summaryrefslogtreecommitdiffstats
path: root/drivers/clk/baikal-t1
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/clk/baikal-t1')
-rw-r--r--drivers/clk/baikal-t1/Kconfig52
-rw-r--r--drivers/clk/baikal-t1/Makefile4
-rw-r--r--drivers/clk/baikal-t1/ccu-div.c648
-rw-r--r--drivers/clk/baikal-t1/ccu-div.h121
-rw-r--r--drivers/clk/baikal-t1/ccu-pll.c558
-rw-r--r--drivers/clk/baikal-t1/ccu-pll.h72
-rw-r--r--drivers/clk/baikal-t1/ccu-rst.c217
-rw-r--r--drivers/clk/baikal-t1/ccu-rst.h67
-rw-r--r--drivers/clk/baikal-t1/clk-ccu-div.c521
-rw-r--r--drivers/clk/baikal-t1/clk-ccu-pll.c277
10 files changed, 2537 insertions, 0 deletions
diff --git a/drivers/clk/baikal-t1/Kconfig b/drivers/clk/baikal-t1/Kconfig
new file mode 100644
index 000000000..f0b186830
--- /dev/null
+++ b/drivers/clk/baikal-t1/Kconfig
@@ -0,0 +1,52 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config CLK_BAIKAL_T1
+ bool "Baikal-T1 Clocks Control Unit interface"
+ depends on (MIPS_BAIKAL_T1 && OF) || COMPILE_TEST
+ default MIPS_BAIKAL_T1
+ help
+ Clocks Control Unit is the core of Baikal-T1 SoC System Controller
+ responsible for the chip subsystems clocking and resetting. It
+ consists of multiple global clock domains, which can be reset by
+ means of the CCU control registers. These domains and devices placed
+ in them are fed with clocks generated by a hierarchy of PLLs,
+ configurable and fixed clock dividers. Enable this option to be able
+ to select Baikal-T1 CCU PLLs and Dividers drivers.
+
+if CLK_BAIKAL_T1
+
+config CLK_BT1_CCU_PLL
+ bool "Baikal-T1 CCU PLLs support"
+ select MFD_SYSCON
+ default MIPS_BAIKAL_T1
+ help
+ Enable this to support the PLLs embedded into the Baikal-T1 SoC
+ System Controller. These are five PLLs placed at the root of the
+ clocks hierarchy, right after an external reference oscillator
+ (normally of 25MHz). They are used to generate high frequency
+ signals, which are either directly wired to the consumers (like
+ CPUs, DDR, etc.) or passed over the clock dividers to be only
+ then used as an individual reference clock of a target device.
+
+config CLK_BT1_CCU_DIV
+ bool "Baikal-T1 CCU Dividers support"
+ select MFD_SYSCON
+ default MIPS_BAIKAL_T1
+ help
+ Enable this to support the CCU dividers used to distribute clocks
+ between AXI-bus and system devices coming from CCU PLLs of Baikal-T1
+ SoC. CCU dividers can be either configurable or with fixed divider,
+ either gateable or ungateable. Some of the CCU dividers can be as well
+ used to reset the domains they're supplying clock to.
+
+config CLK_BT1_CCU_RST
+ bool "Baikal-T1 CCU Resets support"
+ select RESET_CONTROLLER
+ select MFD_SYSCON
+ default MIPS_BAIKAL_T1
+ help
+ Enable this to support the CCU reset blocks responsible for the
+ AXI-bus and some subsystems reset. These are mainly the
+ self-deasserted reset controls but there are several lines which
+ can be directly asserted/de-asserted (PCIe and DDR sub-domains).
+
+endif
diff --git a/drivers/clk/baikal-t1/Makefile b/drivers/clk/baikal-t1/Makefile
new file mode 100644
index 000000000..9c3637de9
--- /dev/null
+++ b/drivers/clk/baikal-t1/Makefile
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
+obj-$(CONFIG_CLK_BT1_CCU_PLL) += ccu-pll.o clk-ccu-pll.o
+obj-$(CONFIG_CLK_BT1_CCU_DIV) += ccu-div.o clk-ccu-div.o
+obj-$(CONFIG_CLK_BT1_CCU_RST) += ccu-rst.o
diff --git a/drivers/clk/baikal-t1/ccu-div.c b/drivers/clk/baikal-t1/ccu-div.c
new file mode 100644
index 000000000..8d5fc7158
--- /dev/null
+++ b/drivers/clk/baikal-t1/ccu-div.c
@@ -0,0 +1,648 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2020 BAIKAL ELECTRONICS, JSC
+ *
+ * Authors:
+ * Serge Semin <Sergey.Semin@baikalelectronics.ru>
+ * Dmitry Dunaev <dmitry.dunaev@baikalelectronics.ru>
+ *
+ * Baikal-T1 CCU Dividers interface driver
+ */
+
+#define pr_fmt(fmt) "bt1-ccu-div: " fmt
+
+#include <linux/kernel.h>
+#include <linux/printk.h>
+#include <linux/bits.h>
+#include <linux/bitfield.h>
+#include <linux/slab.h>
+#include <linux/clk-provider.h>
+#include <linux/of.h>
+#include <linux/spinlock.h>
+#include <linux/regmap.h>
+#include <linux/delay.h>
+#include <linux/time64.h>
+#include <linux/debugfs.h>
+
+#include "ccu-div.h"
+
+#define CCU_DIV_CTL 0x00
+#define CCU_DIV_CTL_EN BIT(0)
+#define CCU_DIV_CTL_RST BIT(1)
+#define CCU_DIV_CTL_SET_CLKDIV BIT(2)
+#define CCU_DIV_CTL_CLKDIV_FLD 4
+#define CCU_DIV_CTL_CLKDIV_MASK(_width) \
+ GENMASK((_width) + CCU_DIV_CTL_CLKDIV_FLD - 1, CCU_DIV_CTL_CLKDIV_FLD)
+#define CCU_DIV_CTL_LOCK_SHIFTED BIT(27)
+#define CCU_DIV_CTL_GATE_REF_BUF BIT(28)
+#define CCU_DIV_CTL_LOCK_NORMAL BIT(31)
+
+#define CCU_DIV_LOCK_CHECK_RETRIES 50
+
+#define CCU_DIV_CLKDIV_MIN 0
+#define CCU_DIV_CLKDIV_MAX(_mask) \
+ ((_mask) >> CCU_DIV_CTL_CLKDIV_FLD)
+
+/*
+ * Use the next two methods until there are generic field setter and
+ * getter available with non-constant mask support.
+ */
+static inline u32 ccu_div_get(u32 mask, u32 val)
+{
+ return (val & mask) >> CCU_DIV_CTL_CLKDIV_FLD;
+}
+
+static inline u32 ccu_div_prep(u32 mask, u32 val)
+{
+ return (val << CCU_DIV_CTL_CLKDIV_FLD) & mask;
+}
+
+static inline unsigned long ccu_div_lock_delay_ns(unsigned long ref_clk,
+ unsigned long div)
+{
+ u64 ns = 4ULL * (div ?: 1) * NSEC_PER_SEC;
+
+ do_div(ns, ref_clk);
+
+ return ns;
+}
+
+static inline unsigned long ccu_div_calc_freq(unsigned long ref_clk,
+ unsigned long div)
+{
+ return ref_clk / (div ?: 1);
+}
+
+static int ccu_div_var_update_clkdiv(struct ccu_div *div,
+ unsigned long parent_rate,
+ unsigned long divider)
+{
+ unsigned long nd;
+ u32 val = 0;
+ u32 lock;
+ int count;
+
+ nd = ccu_div_lock_delay_ns(parent_rate, divider);
+
+ if (div->features & CCU_DIV_LOCK_SHIFTED)
+ lock = CCU_DIV_CTL_LOCK_SHIFTED;
+ else
+ lock = CCU_DIV_CTL_LOCK_NORMAL;
+
+ regmap_update_bits(div->sys_regs, div->reg_ctl,
+ CCU_DIV_CTL_SET_CLKDIV, CCU_DIV_CTL_SET_CLKDIV);
+
+ /*
+ * Until there is nsec-version of readl_poll_timeout() is available
+ * we have to implement the next polling loop.
+ */
+ count = CCU_DIV_LOCK_CHECK_RETRIES;
+ do {
+ ndelay(nd);
+ regmap_read(div->sys_regs, div->reg_ctl, &val);
+ if (val & lock)
+ return 0;
+ } while (--count);
+
+ return -ETIMEDOUT;
+}
+
+static int ccu_div_var_enable(struct clk_hw *hw)
+{
+ struct clk_hw *parent_hw = clk_hw_get_parent(hw);
+ struct ccu_div *div = to_ccu_div(hw);
+ unsigned long flags;
+ u32 val = 0;
+ int ret;
+
+ if (!parent_hw) {
+ pr_err("Can't enable '%s' with no parent", clk_hw_get_name(hw));
+ return -EINVAL;
+ }
+
+ regmap_read(div->sys_regs, div->reg_ctl, &val);
+ if (val & CCU_DIV_CTL_EN)
+ return 0;
+
+ spin_lock_irqsave(&div->lock, flags);
+ ret = ccu_div_var_update_clkdiv(div, clk_hw_get_rate(parent_hw),
+ ccu_div_get(div->mask, val));
+ if (!ret)
+ regmap_update_bits(div->sys_regs, div->reg_ctl,
+ CCU_DIV_CTL_EN, CCU_DIV_CTL_EN);
+ spin_unlock_irqrestore(&div->lock, flags);
+ if (ret)
+ pr_err("Divider '%s' lock timed out\n", clk_hw_get_name(hw));
+
+ return ret;
+}
+
+static int ccu_div_gate_enable(struct clk_hw *hw)
+{
+ struct ccu_div *div = to_ccu_div(hw);
+ unsigned long flags;
+
+ spin_lock_irqsave(&div->lock, flags);
+ regmap_update_bits(div->sys_regs, div->reg_ctl,
+ CCU_DIV_CTL_EN, CCU_DIV_CTL_EN);
+ spin_unlock_irqrestore(&div->lock, flags);
+
+ return 0;
+}
+
+static void ccu_div_gate_disable(struct clk_hw *hw)
+{
+ struct ccu_div *div = to_ccu_div(hw);
+ unsigned long flags;
+
+ spin_lock_irqsave(&div->lock, flags);
+ regmap_update_bits(div->sys_regs, div->reg_ctl, CCU_DIV_CTL_EN, 0);
+ spin_unlock_irqrestore(&div->lock, flags);
+}
+
+static int ccu_div_gate_is_enabled(struct clk_hw *hw)
+{
+ struct ccu_div *div = to_ccu_div(hw);
+ u32 val = 0;
+
+ regmap_read(div->sys_regs, div->reg_ctl, &val);
+
+ return !!(val & CCU_DIV_CTL_EN);
+}
+
+static int ccu_div_buf_enable(struct clk_hw *hw)
+{
+ struct ccu_div *div = to_ccu_div(hw);
+ unsigned long flags;
+
+ spin_lock_irqsave(&div->lock, flags);
+ regmap_update_bits(div->sys_regs, div->reg_ctl,
+ CCU_DIV_CTL_GATE_REF_BUF, 0);
+ spin_unlock_irqrestore(&div->lock, flags);
+
+ return 0;
+}
+
+static void ccu_div_buf_disable(struct clk_hw *hw)
+{
+ struct ccu_div *div = to_ccu_div(hw);
+ unsigned long flags;
+
+ spin_lock_irqsave(&div->lock, flags);
+ regmap_update_bits(div->sys_regs, div->reg_ctl,
+ CCU_DIV_CTL_GATE_REF_BUF, CCU_DIV_CTL_GATE_REF_BUF);
+ spin_unlock_irqrestore(&div->lock, flags);
+}
+
+static int ccu_div_buf_is_enabled(struct clk_hw *hw)
+{
+ struct ccu_div *div = to_ccu_div(hw);
+ u32 val = 0;
+
+ regmap_read(div->sys_regs, div->reg_ctl, &val);
+
+ return !(val & CCU_DIV_CTL_GATE_REF_BUF);
+}
+
+static unsigned long ccu_div_var_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct ccu_div *div = to_ccu_div(hw);
+ unsigned long divider;
+ u32 val = 0;
+
+ regmap_read(div->sys_regs, div->reg_ctl, &val);
+ divider = ccu_div_get(div->mask, val);
+
+ return ccu_div_calc_freq(parent_rate, divider);
+}
+
+static inline unsigned long ccu_div_var_calc_divider(unsigned long rate,
+ unsigned long parent_rate,
+ unsigned int mask)
+{
+ unsigned long divider;
+
+ divider = parent_rate / rate;
+ return clamp_t(unsigned long, divider, CCU_DIV_CLKDIV_MIN,
+ CCU_DIV_CLKDIV_MAX(mask));
+}
+
+static long ccu_div_var_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *parent_rate)
+{
+ struct ccu_div *div = to_ccu_div(hw);
+ unsigned long divider;
+
+ divider = ccu_div_var_calc_divider(rate, *parent_rate, div->mask);
+
+ return ccu_div_calc_freq(*parent_rate, divider);
+}
+
+/*
+ * This method is used for the clock divider blocks, which support the
+ * on-the-fly rate change. So due to lacking the EN bit functionality
+ * they can't be gated before the rate adjustment.
+ */
+static int ccu_div_var_set_rate_slow(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct ccu_div *div = to_ccu_div(hw);
+ unsigned long flags, divider;
+ u32 val;
+ int ret;
+
+ divider = ccu_div_var_calc_divider(rate, parent_rate, div->mask);
+ if (divider == 1 && div->features & CCU_DIV_SKIP_ONE) {
+ divider = 0;
+ } else if (div->features & CCU_DIV_SKIP_ONE_TO_THREE) {
+ if (divider == 1 || divider == 2)
+ divider = 0;
+ else if (divider == 3)
+ divider = 4;
+ }
+
+ val = ccu_div_prep(div->mask, divider);
+
+ spin_lock_irqsave(&div->lock, flags);
+ regmap_update_bits(div->sys_regs, div->reg_ctl, div->mask, val);
+ ret = ccu_div_var_update_clkdiv(div, parent_rate, divider);
+ spin_unlock_irqrestore(&div->lock, flags);
+ if (ret)
+ pr_err("Divider '%s' lock timed out\n", clk_hw_get_name(hw));
+
+ return ret;
+}
+
+/*
+ * This method is used for the clock divider blocks, which don't support
+ * the on-the-fly rate change.
+ */
+static int ccu_div_var_set_rate_fast(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct ccu_div *div = to_ccu_div(hw);
+ unsigned long flags, divider;
+ u32 val;
+
+ divider = ccu_div_var_calc_divider(rate, parent_rate, div->mask);
+ val = ccu_div_prep(div->mask, divider);
+
+ /*
+ * Also disable the clock divider block if it was enabled by default
+ * or by the bootloader.
+ */
+ spin_lock_irqsave(&div->lock, flags);
+ regmap_update_bits(div->sys_regs, div->reg_ctl,
+ div->mask | CCU_DIV_CTL_EN, val);
+ spin_unlock_irqrestore(&div->lock, flags);
+
+ return 0;
+}
+
+static unsigned long ccu_div_fixed_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct ccu_div *div = to_ccu_div(hw);
+
+ return ccu_div_calc_freq(parent_rate, div->divider);
+}
+
+static long ccu_div_fixed_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *parent_rate)
+{
+ struct ccu_div *div = to_ccu_div(hw);
+
+ return ccu_div_calc_freq(*parent_rate, div->divider);
+}
+
+static int ccu_div_fixed_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ return 0;
+}
+
+#ifdef CONFIG_DEBUG_FS
+
+struct ccu_div_dbgfs_bit {
+ struct ccu_div *div;
+ const char *name;
+ u32 mask;
+};
+
+#define CCU_DIV_DBGFS_BIT_ATTR(_name, _mask) { \
+ .name = _name, \
+ .mask = _mask \
+ }
+
+static const struct ccu_div_dbgfs_bit ccu_div_bits[] = {
+ CCU_DIV_DBGFS_BIT_ATTR("div_en", CCU_DIV_CTL_EN),
+ CCU_DIV_DBGFS_BIT_ATTR("div_rst", CCU_DIV_CTL_RST),
+ CCU_DIV_DBGFS_BIT_ATTR("div_bypass", CCU_DIV_CTL_SET_CLKDIV),
+ CCU_DIV_DBGFS_BIT_ATTR("div_buf", CCU_DIV_CTL_GATE_REF_BUF),
+ CCU_DIV_DBGFS_BIT_ATTR("div_lock", CCU_DIV_CTL_LOCK_NORMAL)
+};
+
+#define CCU_DIV_DBGFS_BIT_NUM ARRAY_SIZE(ccu_div_bits)
+
+/*
+ * It can be dangerous to change the Divider settings behind clock framework
+ * back, therefore we don't provide any kernel config based compile time option
+ * for this feature to enable.
+ */
+#undef CCU_DIV_ALLOW_WRITE_DEBUGFS
+#ifdef CCU_DIV_ALLOW_WRITE_DEBUGFS
+
+static int ccu_div_dbgfs_bit_set(void *priv, u64 val)
+{
+ const struct ccu_div_dbgfs_bit *bit = priv;
+ struct ccu_div *div = bit->div;
+ unsigned long flags;
+
+ spin_lock_irqsave(&div->lock, flags);
+ regmap_update_bits(div->sys_regs, div->reg_ctl,
+ bit->mask, val ? bit->mask : 0);
+ spin_unlock_irqrestore(&div->lock, flags);
+
+ return 0;
+}
+
+static int ccu_div_dbgfs_var_clkdiv_set(void *priv, u64 val)
+{
+ struct ccu_div *div = priv;
+ unsigned long flags;
+ u32 data;
+
+ val = clamp_t(u64, val, CCU_DIV_CLKDIV_MIN,
+ CCU_DIV_CLKDIV_MAX(div->mask));
+ data = ccu_div_prep(div->mask, val);
+
+ spin_lock_irqsave(&div->lock, flags);
+ regmap_update_bits(div->sys_regs, div->reg_ctl, div->mask, data);
+ spin_unlock_irqrestore(&div->lock, flags);
+
+ return 0;
+}
+
+#define ccu_div_dbgfs_mode 0644
+
+#else /* !CCU_DIV_ALLOW_WRITE_DEBUGFS */
+
+#define ccu_div_dbgfs_bit_set NULL
+#define ccu_div_dbgfs_var_clkdiv_set NULL
+#define ccu_div_dbgfs_mode 0444
+
+#endif /* !CCU_DIV_ALLOW_WRITE_DEBUGFS */
+
+static int ccu_div_dbgfs_bit_get(void *priv, u64 *val)
+{
+ const struct ccu_div_dbgfs_bit *bit = priv;
+ struct ccu_div *div = bit->div;
+ u32 data = 0;
+
+ regmap_read(div->sys_regs, div->reg_ctl, &data);
+ *val = !!(data & bit->mask);
+
+ return 0;
+}
+DEFINE_DEBUGFS_ATTRIBUTE(ccu_div_dbgfs_bit_fops,
+ ccu_div_dbgfs_bit_get, ccu_div_dbgfs_bit_set, "%llu\n");
+
+static int ccu_div_dbgfs_var_clkdiv_get(void *priv, u64 *val)
+{
+ struct ccu_div *div = priv;
+ u32 data = 0;
+
+ regmap_read(div->sys_regs, div->reg_ctl, &data);
+ *val = ccu_div_get(div->mask, data);
+
+ return 0;
+}
+DEFINE_DEBUGFS_ATTRIBUTE(ccu_div_dbgfs_var_clkdiv_fops,
+ ccu_div_dbgfs_var_clkdiv_get, ccu_div_dbgfs_var_clkdiv_set, "%llu\n");
+
+static int ccu_div_dbgfs_fixed_clkdiv_get(void *priv, u64 *val)
+{
+ struct ccu_div *div = priv;
+
+ *val = div->divider;
+
+ return 0;
+}
+DEFINE_DEBUGFS_ATTRIBUTE(ccu_div_dbgfs_fixed_clkdiv_fops,
+ ccu_div_dbgfs_fixed_clkdiv_get, NULL, "%llu\n");
+
+static void ccu_div_var_debug_init(struct clk_hw *hw, struct dentry *dentry)
+{
+ struct ccu_div *div = to_ccu_div(hw);
+ struct ccu_div_dbgfs_bit *bits;
+ int didx, bidx, num = 2;
+ const char *name;
+
+ num += !!(div->flags & CLK_SET_RATE_GATE) +
+ !!(div->features & CCU_DIV_RESET_DOMAIN);
+
+ bits = kcalloc(num, sizeof(*bits), GFP_KERNEL);
+ if (!bits)
+ return;
+
+ for (didx = 0, bidx = 0; bidx < CCU_DIV_DBGFS_BIT_NUM; ++bidx) {
+ name = ccu_div_bits[bidx].name;
+ if (!(div->flags & CLK_SET_RATE_GATE) &&
+ !strcmp("div_en", name)) {
+ continue;
+ }
+
+ if (!(div->features & CCU_DIV_RESET_DOMAIN) &&
+ !strcmp("div_rst", name)) {
+ continue;
+ }
+
+ if (!strcmp("div_buf", name))
+ continue;
+
+ bits[didx] = ccu_div_bits[bidx];
+ bits[didx].div = div;
+
+ if (div->features & CCU_DIV_LOCK_SHIFTED &&
+ !strcmp("div_lock", name)) {
+ bits[didx].mask = CCU_DIV_CTL_LOCK_SHIFTED;
+ }
+
+ debugfs_create_file_unsafe(bits[didx].name, ccu_div_dbgfs_mode,
+ dentry, &bits[didx],
+ &ccu_div_dbgfs_bit_fops);
+ ++didx;
+ }
+
+ debugfs_create_file_unsafe("div_clkdiv", ccu_div_dbgfs_mode, dentry,
+ div, &ccu_div_dbgfs_var_clkdiv_fops);
+}
+
+static void ccu_div_gate_debug_init(struct clk_hw *hw, struct dentry *dentry)
+{
+ struct ccu_div *div = to_ccu_div(hw);
+ struct ccu_div_dbgfs_bit *bit;
+
+ bit = kmalloc(sizeof(*bit), GFP_KERNEL);
+ if (!bit)
+ return;
+
+ *bit = ccu_div_bits[0];
+ bit->div = div;
+ debugfs_create_file_unsafe(bit->name, ccu_div_dbgfs_mode, dentry, bit,
+ &ccu_div_dbgfs_bit_fops);
+
+ debugfs_create_file_unsafe("div_clkdiv", 0400, dentry, div,
+ &ccu_div_dbgfs_fixed_clkdiv_fops);
+}
+
+static void ccu_div_buf_debug_init(struct clk_hw *hw, struct dentry *dentry)
+{
+ struct ccu_div *div = to_ccu_div(hw);
+ struct ccu_div_dbgfs_bit *bit;
+
+ bit = kmalloc(sizeof(*bit), GFP_KERNEL);
+ if (!bit)
+ return;
+
+ *bit = ccu_div_bits[3];
+ bit->div = div;
+ debugfs_create_file_unsafe(bit->name, ccu_div_dbgfs_mode, dentry, bit,
+ &ccu_div_dbgfs_bit_fops);
+}
+
+static void ccu_div_fixed_debug_init(struct clk_hw *hw, struct dentry *dentry)
+{
+ struct ccu_div *div = to_ccu_div(hw);
+
+ debugfs_create_file_unsafe("div_clkdiv", 0400, dentry, div,
+ &ccu_div_dbgfs_fixed_clkdiv_fops);
+}
+
+#else /* !CONFIG_DEBUG_FS */
+
+#define ccu_div_var_debug_init NULL
+#define ccu_div_gate_debug_init NULL
+#define ccu_div_buf_debug_init NULL
+#define ccu_div_fixed_debug_init NULL
+
+#endif /* !CONFIG_DEBUG_FS */
+
+static const struct clk_ops ccu_div_var_gate_to_set_ops = {
+ .enable = ccu_div_var_enable,
+ .disable = ccu_div_gate_disable,
+ .is_enabled = ccu_div_gate_is_enabled,
+ .recalc_rate = ccu_div_var_recalc_rate,
+ .round_rate = ccu_div_var_round_rate,
+ .set_rate = ccu_div_var_set_rate_fast,
+ .debug_init = ccu_div_var_debug_init
+};
+
+static const struct clk_ops ccu_div_var_nogate_ops = {
+ .recalc_rate = ccu_div_var_recalc_rate,
+ .round_rate = ccu_div_var_round_rate,
+ .set_rate = ccu_div_var_set_rate_slow,
+ .debug_init = ccu_div_var_debug_init
+};
+
+static const struct clk_ops ccu_div_gate_ops = {
+ .enable = ccu_div_gate_enable,
+ .disable = ccu_div_gate_disable,
+ .is_enabled = ccu_div_gate_is_enabled,
+ .recalc_rate = ccu_div_fixed_recalc_rate,
+ .round_rate = ccu_div_fixed_round_rate,
+ .set_rate = ccu_div_fixed_set_rate,
+ .debug_init = ccu_div_gate_debug_init
+};
+
+static const struct clk_ops ccu_div_buf_ops = {
+ .enable = ccu_div_buf_enable,
+ .disable = ccu_div_buf_disable,
+ .is_enabled = ccu_div_buf_is_enabled,
+ .debug_init = ccu_div_buf_debug_init
+};
+
+static const struct clk_ops ccu_div_fixed_ops = {
+ .recalc_rate = ccu_div_fixed_recalc_rate,
+ .round_rate = ccu_div_fixed_round_rate,
+ .set_rate = ccu_div_fixed_set_rate,
+ .debug_init = ccu_div_fixed_debug_init
+};
+
+struct ccu_div *ccu_div_hw_register(const struct ccu_div_init_data *div_init)
+{
+ struct clk_parent_data parent_data = { };
+ struct clk_init_data hw_init = { };
+ struct ccu_div *div;
+ int ret;
+
+ if (!div_init)
+ return ERR_PTR(-EINVAL);
+
+ div = kzalloc(sizeof(*div), GFP_KERNEL);
+ if (!div)
+ return ERR_PTR(-ENOMEM);
+
+ /*
+ * Note since Baikal-T1 System Controller registers are MMIO-backed
+ * we won't check the regmap IO operations return status, because it
+ * must be zero anyway.
+ */
+ div->hw.init = &hw_init;
+ div->id = div_init->id;
+ div->reg_ctl = div_init->base + CCU_DIV_CTL;
+ div->sys_regs = div_init->sys_regs;
+ div->flags = div_init->flags;
+ div->features = div_init->features;
+ spin_lock_init(&div->lock);
+
+ hw_init.name = div_init->name;
+ hw_init.flags = div_init->flags;
+
+ if (div_init->type == CCU_DIV_VAR) {
+ if (hw_init.flags & CLK_SET_RATE_GATE)
+ hw_init.ops = &ccu_div_var_gate_to_set_ops;
+ else
+ hw_init.ops = &ccu_div_var_nogate_ops;
+ div->mask = CCU_DIV_CTL_CLKDIV_MASK(div_init->width);
+ } else if (div_init->type == CCU_DIV_GATE) {
+ hw_init.ops = &ccu_div_gate_ops;
+ div->divider = div_init->divider;
+ } else if (div_init->type == CCU_DIV_BUF) {
+ hw_init.ops = &ccu_div_buf_ops;
+ } else if (div_init->type == CCU_DIV_FIXED) {
+ hw_init.ops = &ccu_div_fixed_ops;
+ div->divider = div_init->divider;
+ } else {
+ ret = -EINVAL;
+ goto err_free_div;
+ }
+
+ if (!div_init->parent_name) {
+ ret = -EINVAL;
+ goto err_free_div;
+ }
+ parent_data.fw_name = div_init->parent_name;
+ parent_data.name = div_init->parent_name;
+ hw_init.parent_data = &parent_data;
+ hw_init.num_parents = 1;
+
+ ret = of_clk_hw_register(div_init->np, &div->hw);
+ if (ret)
+ goto err_free_div;
+
+ return div;
+
+err_free_div:
+ kfree(div);
+
+ return ERR_PTR(ret);
+}
+
+void ccu_div_hw_unregister(struct ccu_div *div)
+{
+ clk_hw_unregister(&div->hw);
+
+ kfree(div);
+}
diff --git a/drivers/clk/baikal-t1/ccu-div.h b/drivers/clk/baikal-t1/ccu-div.h
new file mode 100644
index 000000000..76d8ee44d
--- /dev/null
+++ b/drivers/clk/baikal-t1/ccu-div.h
@@ -0,0 +1,121 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2020 BAIKAL ELECTRONICS, JSC
+ *
+ * Baikal-T1 CCU Dividers interface driver
+ */
+#ifndef __CLK_BT1_CCU_DIV_H__
+#define __CLK_BT1_CCU_DIV_H__
+
+#include <linux/clk-provider.h>
+#include <linux/spinlock.h>
+#include <linux/regmap.h>
+#include <linux/bits.h>
+#include <linux/of.h>
+
+/*
+ * CCU Divider private clock IDs
+ * @CCU_SYS_SATA_CLK: CCU SATA internal clock
+ * @CCU_SYS_XGMAC_CLK: CCU XGMAC internal clock
+ */
+#define CCU_SYS_SATA_CLK -1
+#define CCU_SYS_XGMAC_CLK -2
+
+/*
+ * CCU Divider private flags
+ * @CCU_DIV_BASIC: Basic divider clock required by the kernel as early as
+ * possible.
+ * @CCU_DIV_SKIP_ONE: Due to some reason divider can't be set to 1.
+ * It can be 0 though, which is functionally the same.
+ * @CCU_DIV_SKIP_ONE_TO_THREE: For some reason divider can't be within [1,3].
+ * It can be either 0 or greater than 3.
+ * @CCU_DIV_LOCK_SHIFTED: Find lock-bit at non-standard position.
+ * @CCU_DIV_RESET_DOMAIN: There is a clock domain reset handle.
+ */
+#define CCU_DIV_BASIC BIT(0)
+#define CCU_DIV_SKIP_ONE BIT(1)
+#define CCU_DIV_SKIP_ONE_TO_THREE BIT(2)
+#define CCU_DIV_LOCK_SHIFTED BIT(3)
+#define CCU_DIV_RESET_DOMAIN BIT(4)
+
+/*
+ * enum ccu_div_type - CCU Divider types
+ * @CCU_DIV_VAR: Clocks gate with variable divider.
+ * @CCU_DIV_GATE: Clocks gate with fixed divider.
+ * @CCU_DIV_BUF: Clock gate with no divider.
+ * @CCU_DIV_FIXED: Ungateable clock with fixed divider.
+ */
+enum ccu_div_type {
+ CCU_DIV_VAR,
+ CCU_DIV_GATE,
+ CCU_DIV_BUF,
+ CCU_DIV_FIXED
+};
+
+/*
+ * struct ccu_div_init_data - CCU Divider initialization data
+ * @id: Clocks private identifier.
+ * @name: Clocks name.
+ * @parent_name: Parent clocks name in a fw node.
+ * @base: Divider register base address with respect to the sys_regs base.
+ * @sys_regs: Baikal-T1 System Controller registers map.
+ * @np: Pointer to the node describing the CCU Dividers.
+ * @type: CCU divider type (variable, fixed with and without gate).
+ * @width: Divider width if it's variable.
+ * @divider: Divider fixed value.
+ * @flags: CCU Divider clock flags.
+ * @features: CCU Divider private features.
+ */
+struct ccu_div_init_data {
+ unsigned int id;
+ const char *name;
+ const char *parent_name;
+ unsigned int base;
+ struct regmap *sys_regs;
+ struct device_node *np;
+ enum ccu_div_type type;
+ union {
+ unsigned int width;
+ unsigned int divider;
+ };
+ unsigned long flags;
+ unsigned long features;
+};
+
+/*
+ * struct ccu_div - CCU Divider descriptor
+ * @hw: clk_hw of the divider.
+ * @id: Clock private identifier.
+ * @reg_ctl: Divider control register base address.
+ * @sys_regs: Baikal-T1 System Controller registers map.
+ * @lock: Divider state change spin-lock.
+ * @mask: Divider field mask.
+ * @divider: Divider fixed value.
+ * @flags: Divider clock flags.
+ * @features: CCU Divider private features.
+ */
+struct ccu_div {
+ struct clk_hw hw;
+ unsigned int id;
+ unsigned int reg_ctl;
+ struct regmap *sys_regs;
+ spinlock_t lock;
+ union {
+ u32 mask;
+ unsigned int divider;
+ };
+ unsigned long flags;
+ unsigned long features;
+};
+#define to_ccu_div(_hw) container_of(_hw, struct ccu_div, hw)
+
+static inline struct clk_hw *ccu_div_get_clk_hw(struct ccu_div *div)
+{
+ return div ? &div->hw : NULL;
+}
+
+struct ccu_div *ccu_div_hw_register(const struct ccu_div_init_data *init);
+
+void ccu_div_hw_unregister(struct ccu_div *div);
+
+#endif /* __CLK_BT1_CCU_DIV_H__ */
diff --git a/drivers/clk/baikal-t1/ccu-pll.c b/drivers/clk/baikal-t1/ccu-pll.c
new file mode 100644
index 000000000..13ef28001
--- /dev/null
+++ b/drivers/clk/baikal-t1/ccu-pll.c
@@ -0,0 +1,558 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2020 BAIKAL ELECTRONICS, JSC
+ *
+ * Authors:
+ * Serge Semin <Sergey.Semin@baikalelectronics.ru>
+ * Dmitry Dunaev <dmitry.dunaev@baikalelectronics.ru>
+ *
+ * Baikal-T1 CCU PLL interface driver
+ */
+
+#define pr_fmt(fmt) "bt1-ccu-pll: " fmt
+
+#include <linux/kernel.h>
+#include <linux/printk.h>
+#include <linux/limits.h>
+#include <linux/bits.h>
+#include <linux/bitfield.h>
+#include <linux/slab.h>
+#include <linux/clk-provider.h>
+#include <linux/of.h>
+#include <linux/spinlock.h>
+#include <linux/regmap.h>
+#include <linux/iopoll.h>
+#include <linux/time64.h>
+#include <linux/rational.h>
+#include <linux/debugfs.h>
+
+#include "ccu-pll.h"
+
+#define CCU_PLL_CTL 0x000
+#define CCU_PLL_CTL_EN BIT(0)
+#define CCU_PLL_CTL_RST BIT(1)
+#define CCU_PLL_CTL_CLKR_FLD 2
+#define CCU_PLL_CTL_CLKR_MASK GENMASK(7, CCU_PLL_CTL_CLKR_FLD)
+#define CCU_PLL_CTL_CLKF_FLD 8
+#define CCU_PLL_CTL_CLKF_MASK GENMASK(20, CCU_PLL_CTL_CLKF_FLD)
+#define CCU_PLL_CTL_CLKOD_FLD 21
+#define CCU_PLL_CTL_CLKOD_MASK GENMASK(24, CCU_PLL_CTL_CLKOD_FLD)
+#define CCU_PLL_CTL_BYPASS BIT(30)
+#define CCU_PLL_CTL_LOCK BIT(31)
+#define CCU_PLL_CTL1 0x004
+#define CCU_PLL_CTL1_BWADJ_FLD 3
+#define CCU_PLL_CTL1_BWADJ_MASK GENMASK(14, CCU_PLL_CTL1_BWADJ_FLD)
+
+#define CCU_PLL_LOCK_CHECK_RETRIES 50
+
+#define CCU_PLL_NR_MAX \
+ ((CCU_PLL_CTL_CLKR_MASK >> CCU_PLL_CTL_CLKR_FLD) + 1)
+#define CCU_PLL_NF_MAX \
+ ((CCU_PLL_CTL_CLKF_MASK >> (CCU_PLL_CTL_CLKF_FLD + 1)) + 1)
+#define CCU_PLL_OD_MAX \
+ ((CCU_PLL_CTL_CLKOD_MASK >> CCU_PLL_CTL_CLKOD_FLD) + 1)
+#define CCU_PLL_NB_MAX \
+ ((CCU_PLL_CTL1_BWADJ_MASK >> CCU_PLL_CTL1_BWADJ_FLD) + 1)
+#define CCU_PLL_FDIV_MIN 427000UL
+#define CCU_PLL_FDIV_MAX 3500000000UL
+#define CCU_PLL_FOUT_MIN 200000000UL
+#define CCU_PLL_FOUT_MAX 2500000000UL
+#define CCU_PLL_FVCO_MIN 700000000UL
+#define CCU_PLL_FVCO_MAX 3500000000UL
+#define CCU_PLL_CLKOD_FACTOR 2
+
+static inline unsigned long ccu_pll_lock_delay_us(unsigned long ref_clk,
+ unsigned long nr)
+{
+ u64 us = 500ULL * nr * USEC_PER_SEC;
+
+ do_div(us, ref_clk);
+
+ return us;
+}
+
+static inline unsigned long ccu_pll_calc_freq(unsigned long ref_clk,
+ unsigned long nr,
+ unsigned long nf,
+ unsigned long od)
+{
+ u64 tmp = ref_clk;
+
+ do_div(tmp, nr);
+ tmp *= nf;
+ do_div(tmp, od);
+
+ return tmp;
+}
+
+static int ccu_pll_reset(struct ccu_pll *pll, unsigned long ref_clk,
+ unsigned long nr)
+{
+ unsigned long ud, ut;
+ u32 val;
+
+ ud = ccu_pll_lock_delay_us(ref_clk, nr);
+ ut = ud * CCU_PLL_LOCK_CHECK_RETRIES;
+
+ regmap_update_bits(pll->sys_regs, pll->reg_ctl,
+ CCU_PLL_CTL_RST, CCU_PLL_CTL_RST);
+
+ return regmap_read_poll_timeout_atomic(pll->sys_regs, pll->reg_ctl, val,
+ val & CCU_PLL_CTL_LOCK, ud, ut);
+}
+
+static int ccu_pll_enable(struct clk_hw *hw)
+{
+ struct clk_hw *parent_hw = clk_hw_get_parent(hw);
+ struct ccu_pll *pll = to_ccu_pll(hw);
+ unsigned long flags;
+ u32 val = 0;
+ int ret;
+
+ if (!parent_hw) {
+ pr_err("Can't enable '%s' with no parent", clk_hw_get_name(hw));
+ return -EINVAL;
+ }
+
+ regmap_read(pll->sys_regs, pll->reg_ctl, &val);
+ if (val & CCU_PLL_CTL_EN)
+ return 0;
+
+ spin_lock_irqsave(&pll->lock, flags);
+ regmap_write(pll->sys_regs, pll->reg_ctl, val | CCU_PLL_CTL_EN);
+ ret = ccu_pll_reset(pll, clk_hw_get_rate(parent_hw),
+ FIELD_GET(CCU_PLL_CTL_CLKR_MASK, val) + 1);
+ spin_unlock_irqrestore(&pll->lock, flags);
+ if (ret)
+ pr_err("PLL '%s' reset timed out\n", clk_hw_get_name(hw));
+
+ return ret;
+}
+
+static void ccu_pll_disable(struct clk_hw *hw)
+{
+ struct ccu_pll *pll = to_ccu_pll(hw);
+ unsigned long flags;
+
+ spin_lock_irqsave(&pll->lock, flags);
+ regmap_update_bits(pll->sys_regs, pll->reg_ctl, CCU_PLL_CTL_EN, 0);
+ spin_unlock_irqrestore(&pll->lock, flags);
+}
+
+static int ccu_pll_is_enabled(struct clk_hw *hw)
+{
+ struct ccu_pll *pll = to_ccu_pll(hw);
+ u32 val = 0;
+
+ regmap_read(pll->sys_regs, pll->reg_ctl, &val);
+
+ return !!(val & CCU_PLL_CTL_EN);
+}
+
+static unsigned long ccu_pll_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct ccu_pll *pll = to_ccu_pll(hw);
+ unsigned long nr, nf, od;
+ u32 val = 0;
+
+ regmap_read(pll->sys_regs, pll->reg_ctl, &val);
+ nr = FIELD_GET(CCU_PLL_CTL_CLKR_MASK, val) + 1;
+ nf = FIELD_GET(CCU_PLL_CTL_CLKF_MASK, val) + 1;
+ od = FIELD_GET(CCU_PLL_CTL_CLKOD_MASK, val) + 1;
+
+ return ccu_pll_calc_freq(parent_rate, nr, nf, od);
+}
+
+static void ccu_pll_calc_factors(unsigned long rate, unsigned long parent_rate,
+ unsigned long *nr, unsigned long *nf,
+ unsigned long *od)
+{
+ unsigned long err, freq, min_err = ULONG_MAX;
+ unsigned long num, denom, n1, d1, nri;
+ unsigned long nr_max, nf_max, od_max;
+
+ /*
+ * Make sure PLL is working with valid input signal (Fdiv). If
+ * you want to speed the function up just reduce CCU_PLL_NR_MAX.
+ * This will cause a worse approximation though.
+ */
+ nri = (parent_rate / CCU_PLL_FDIV_MAX) + 1;
+ nr_max = min(parent_rate / CCU_PLL_FDIV_MIN, CCU_PLL_NR_MAX);
+
+ /*
+ * Find a closest [nr;nf;od] vector taking into account the
+ * limitations like: 1) 700MHz <= Fvco <= 3.5GHz, 2) PLL Od is
+ * either 1 or even number within the acceptable range (alas 1s
+ * is also excluded by the next loop).
+ */
+ for (; nri <= nr_max; ++nri) {
+ /* Use Od factor to fulfill the limitation 2). */
+ num = CCU_PLL_CLKOD_FACTOR * rate;
+ denom = parent_rate / nri;
+
+ /*
+ * Make sure Fvco is within the acceptable range to fulfill
+ * the condition 1). Note due to the CCU_PLL_CLKOD_FACTOR value
+ * the actual upper limit is also divided by that factor.
+ * It's not big problem for us since practically there is no
+ * need in clocks with that high frequency.
+ */
+ nf_max = min(CCU_PLL_FVCO_MAX / denom, CCU_PLL_NF_MAX);
+ od_max = CCU_PLL_OD_MAX / CCU_PLL_CLKOD_FACTOR;
+
+ /*
+ * Bypass the out-of-bound values, which can't be properly
+ * handled by the rational fraction approximation algorithm.
+ */
+ if (num / denom >= nf_max) {
+ n1 = nf_max;
+ d1 = 1;
+ } else if (denom / num >= od_max) {
+ n1 = 1;
+ d1 = od_max;
+ } else {
+ rational_best_approximation(num, denom, nf_max, od_max,
+ &n1, &d1);
+ }
+
+ /* Select the best approximation of the target rate. */
+ freq = ccu_pll_calc_freq(parent_rate, nri, n1, d1);
+ err = abs((int64_t)freq - num);
+ if (err < min_err) {
+ min_err = err;
+ *nr = nri;
+ *nf = n1;
+ *od = CCU_PLL_CLKOD_FACTOR * d1;
+ }
+ }
+}
+
+static long ccu_pll_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *parent_rate)
+{
+ unsigned long nr = 1, nf = 1, od = 1;
+
+ ccu_pll_calc_factors(rate, *parent_rate, &nr, &nf, &od);
+
+ return ccu_pll_calc_freq(*parent_rate, nr, nf, od);
+}
+
+/*
+ * This method is used for PLLs, which support the on-the-fly dividers
+ * adjustment. So there is no need in gating such clocks.
+ */
+static int ccu_pll_set_rate_reset(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct ccu_pll *pll = to_ccu_pll(hw);
+ unsigned long nr, nf, od;
+ unsigned long flags;
+ u32 mask, val;
+ int ret;
+
+ ccu_pll_calc_factors(rate, parent_rate, &nr, &nf, &od);
+
+ mask = CCU_PLL_CTL_CLKR_MASK | CCU_PLL_CTL_CLKF_MASK |
+ CCU_PLL_CTL_CLKOD_MASK;
+ val = FIELD_PREP(CCU_PLL_CTL_CLKR_MASK, nr - 1) |
+ FIELD_PREP(CCU_PLL_CTL_CLKF_MASK, nf - 1) |
+ FIELD_PREP(CCU_PLL_CTL_CLKOD_MASK, od - 1);
+
+ spin_lock_irqsave(&pll->lock, flags);
+ regmap_update_bits(pll->sys_regs, pll->reg_ctl, mask, val);
+ ret = ccu_pll_reset(pll, parent_rate, nr);
+ spin_unlock_irqrestore(&pll->lock, flags);
+ if (ret)
+ pr_err("PLL '%s' reset timed out\n", clk_hw_get_name(hw));
+
+ return ret;
+}
+
+/*
+ * This method is used for PLLs, which don't support the on-the-fly dividers
+ * adjustment. So the corresponding clocks are supposed to be gated first.
+ */
+static int ccu_pll_set_rate_norst(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct ccu_pll *pll = to_ccu_pll(hw);
+ unsigned long nr, nf, od;
+ unsigned long flags;
+ u32 mask, val;
+
+ ccu_pll_calc_factors(rate, parent_rate, &nr, &nf, &od);
+
+ /*
+ * Disable PLL if it was enabled by default or left enabled by the
+ * system bootloader.
+ */
+ mask = CCU_PLL_CTL_CLKR_MASK | CCU_PLL_CTL_CLKF_MASK |
+ CCU_PLL_CTL_CLKOD_MASK | CCU_PLL_CTL_EN;
+ val = FIELD_PREP(CCU_PLL_CTL_CLKR_MASK, nr - 1) |
+ FIELD_PREP(CCU_PLL_CTL_CLKF_MASK, nf - 1) |
+ FIELD_PREP(CCU_PLL_CTL_CLKOD_MASK, od - 1);
+
+ spin_lock_irqsave(&pll->lock, flags);
+ regmap_update_bits(pll->sys_regs, pll->reg_ctl, mask, val);
+ spin_unlock_irqrestore(&pll->lock, flags);
+
+ return 0;
+}
+
+#ifdef CONFIG_DEBUG_FS
+
+struct ccu_pll_dbgfs_bit {
+ struct ccu_pll *pll;
+ const char *name;
+ unsigned int reg;
+ u32 mask;
+};
+
+struct ccu_pll_dbgfs_fld {
+ struct ccu_pll *pll;
+ const char *name;
+ unsigned int reg;
+ unsigned int lsb;
+ u32 mask;
+ u32 min;
+ u32 max;
+};
+
+#define CCU_PLL_DBGFS_BIT_ATTR(_name, _reg, _mask) \
+ { \
+ .name = _name, \
+ .reg = _reg, \
+ .mask = _mask \
+ }
+
+#define CCU_PLL_DBGFS_FLD_ATTR(_name, _reg, _lsb, _mask, _min, _max) \
+ { \
+ .name = _name, \
+ .reg = _reg, \
+ .lsb = _lsb, \
+ .mask = _mask, \
+ .min = _min, \
+ .max = _max \
+ }
+
+static const struct ccu_pll_dbgfs_bit ccu_pll_bits[] = {
+ CCU_PLL_DBGFS_BIT_ATTR("pll_en", CCU_PLL_CTL, CCU_PLL_CTL_EN),
+ CCU_PLL_DBGFS_BIT_ATTR("pll_rst", CCU_PLL_CTL, CCU_PLL_CTL_RST),
+ CCU_PLL_DBGFS_BIT_ATTR("pll_bypass", CCU_PLL_CTL, CCU_PLL_CTL_BYPASS),
+ CCU_PLL_DBGFS_BIT_ATTR("pll_lock", CCU_PLL_CTL, CCU_PLL_CTL_LOCK)
+};
+
+#define CCU_PLL_DBGFS_BIT_NUM ARRAY_SIZE(ccu_pll_bits)
+
+static const struct ccu_pll_dbgfs_fld ccu_pll_flds[] = {
+ CCU_PLL_DBGFS_FLD_ATTR("pll_nr", CCU_PLL_CTL, CCU_PLL_CTL_CLKR_FLD,
+ CCU_PLL_CTL_CLKR_MASK, 1, CCU_PLL_NR_MAX),
+ CCU_PLL_DBGFS_FLD_ATTR("pll_nf", CCU_PLL_CTL, CCU_PLL_CTL_CLKF_FLD,
+ CCU_PLL_CTL_CLKF_MASK, 1, CCU_PLL_NF_MAX),
+ CCU_PLL_DBGFS_FLD_ATTR("pll_od", CCU_PLL_CTL, CCU_PLL_CTL_CLKOD_FLD,
+ CCU_PLL_CTL_CLKOD_MASK, 1, CCU_PLL_OD_MAX),
+ CCU_PLL_DBGFS_FLD_ATTR("pll_nb", CCU_PLL_CTL1, CCU_PLL_CTL1_BWADJ_FLD,
+ CCU_PLL_CTL1_BWADJ_MASK, 1, CCU_PLL_NB_MAX)
+};
+
+#define CCU_PLL_DBGFS_FLD_NUM ARRAY_SIZE(ccu_pll_flds)
+
+/*
+ * It can be dangerous to change the PLL settings behind clock framework back,
+ * therefore we don't provide any kernel config based compile time option for
+ * this feature to enable.
+ */
+#undef CCU_PLL_ALLOW_WRITE_DEBUGFS
+#ifdef CCU_PLL_ALLOW_WRITE_DEBUGFS
+
+static int ccu_pll_dbgfs_bit_set(void *priv, u64 val)
+{
+ const struct ccu_pll_dbgfs_bit *bit = priv;
+ struct ccu_pll *pll = bit->pll;
+ unsigned long flags;
+
+ spin_lock_irqsave(&pll->lock, flags);
+ regmap_update_bits(pll->sys_regs, pll->reg_ctl + bit->reg,
+ bit->mask, val ? bit->mask : 0);
+ spin_unlock_irqrestore(&pll->lock, flags);
+
+ return 0;
+}
+
+static int ccu_pll_dbgfs_fld_set(void *priv, u64 val)
+{
+ struct ccu_pll_dbgfs_fld *fld = priv;
+ struct ccu_pll *pll = fld->pll;
+ unsigned long flags;
+ u32 data;
+
+ val = clamp_t(u64, val, fld->min, fld->max);
+ data = ((val - 1) << fld->lsb) & fld->mask;
+
+ spin_lock_irqsave(&pll->lock, flags);
+ regmap_update_bits(pll->sys_regs, pll->reg_ctl + fld->reg, fld->mask,
+ data);
+ spin_unlock_irqrestore(&pll->lock, flags);
+
+ return 0;
+}
+
+#define ccu_pll_dbgfs_mode 0644
+
+#else /* !CCU_PLL_ALLOW_WRITE_DEBUGFS */
+
+#define ccu_pll_dbgfs_bit_set NULL
+#define ccu_pll_dbgfs_fld_set NULL
+#define ccu_pll_dbgfs_mode 0444
+
+#endif /* !CCU_PLL_ALLOW_WRITE_DEBUGFS */
+
+static int ccu_pll_dbgfs_bit_get(void *priv, u64 *val)
+{
+ struct ccu_pll_dbgfs_bit *bit = priv;
+ struct ccu_pll *pll = bit->pll;
+ u32 data = 0;
+
+ regmap_read(pll->sys_regs, pll->reg_ctl + bit->reg, &data);
+ *val = !!(data & bit->mask);
+
+ return 0;
+}
+DEFINE_DEBUGFS_ATTRIBUTE(ccu_pll_dbgfs_bit_fops,
+ ccu_pll_dbgfs_bit_get, ccu_pll_dbgfs_bit_set, "%llu\n");
+
+static int ccu_pll_dbgfs_fld_get(void *priv, u64 *val)
+{
+ struct ccu_pll_dbgfs_fld *fld = priv;
+ struct ccu_pll *pll = fld->pll;
+ u32 data = 0;
+
+ regmap_read(pll->sys_regs, pll->reg_ctl + fld->reg, &data);
+ *val = ((data & fld->mask) >> fld->lsb) + 1;
+
+ return 0;
+}
+DEFINE_DEBUGFS_ATTRIBUTE(ccu_pll_dbgfs_fld_fops,
+ ccu_pll_dbgfs_fld_get, ccu_pll_dbgfs_fld_set, "%llu\n");
+
+static void ccu_pll_debug_init(struct clk_hw *hw, struct dentry *dentry)
+{
+ struct ccu_pll *pll = to_ccu_pll(hw);
+ struct ccu_pll_dbgfs_bit *bits;
+ struct ccu_pll_dbgfs_fld *flds;
+ int idx;
+
+ bits = kcalloc(CCU_PLL_DBGFS_BIT_NUM, sizeof(*bits), GFP_KERNEL);
+ if (!bits)
+ return;
+
+ for (idx = 0; idx < CCU_PLL_DBGFS_BIT_NUM; ++idx) {
+ bits[idx] = ccu_pll_bits[idx];
+ bits[idx].pll = pll;
+
+ debugfs_create_file_unsafe(bits[idx].name, ccu_pll_dbgfs_mode,
+ dentry, &bits[idx],
+ &ccu_pll_dbgfs_bit_fops);
+ }
+
+ flds = kcalloc(CCU_PLL_DBGFS_FLD_NUM, sizeof(*flds), GFP_KERNEL);
+ if (!flds)
+ return;
+
+ for (idx = 0; idx < CCU_PLL_DBGFS_FLD_NUM; ++idx) {
+ flds[idx] = ccu_pll_flds[idx];
+ flds[idx].pll = pll;
+
+ debugfs_create_file_unsafe(flds[idx].name, ccu_pll_dbgfs_mode,
+ dentry, &flds[idx],
+ &ccu_pll_dbgfs_fld_fops);
+ }
+}
+
+#else /* !CONFIG_DEBUG_FS */
+
+#define ccu_pll_debug_init NULL
+
+#endif /* !CONFIG_DEBUG_FS */
+
+static const struct clk_ops ccu_pll_gate_to_set_ops = {
+ .enable = ccu_pll_enable,
+ .disable = ccu_pll_disable,
+ .is_enabled = ccu_pll_is_enabled,
+ .recalc_rate = ccu_pll_recalc_rate,
+ .round_rate = ccu_pll_round_rate,
+ .set_rate = ccu_pll_set_rate_norst,
+ .debug_init = ccu_pll_debug_init
+};
+
+static const struct clk_ops ccu_pll_straight_set_ops = {
+ .enable = ccu_pll_enable,
+ .disable = ccu_pll_disable,
+ .is_enabled = ccu_pll_is_enabled,
+ .recalc_rate = ccu_pll_recalc_rate,
+ .round_rate = ccu_pll_round_rate,
+ .set_rate = ccu_pll_set_rate_reset,
+ .debug_init = ccu_pll_debug_init
+};
+
+struct ccu_pll *ccu_pll_hw_register(const struct ccu_pll_init_data *pll_init)
+{
+ struct clk_parent_data parent_data = { };
+ struct clk_init_data hw_init = { };
+ struct ccu_pll *pll;
+ int ret;
+
+ if (!pll_init)
+ return ERR_PTR(-EINVAL);
+
+ pll = kzalloc(sizeof(*pll), GFP_KERNEL);
+ if (!pll)
+ return ERR_PTR(-ENOMEM);
+
+ /*
+ * Note since Baikal-T1 System Controller registers are MMIO-backed
+ * we won't check the regmap IO operations return status, because it
+ * must be zero anyway.
+ */
+ pll->hw.init = &hw_init;
+ pll->reg_ctl = pll_init->base + CCU_PLL_CTL;
+ pll->reg_ctl1 = pll_init->base + CCU_PLL_CTL1;
+ pll->sys_regs = pll_init->sys_regs;
+ pll->id = pll_init->id;
+ spin_lock_init(&pll->lock);
+
+ hw_init.name = pll_init->name;
+ hw_init.flags = pll_init->flags;
+
+ if (hw_init.flags & CLK_SET_RATE_GATE)
+ hw_init.ops = &ccu_pll_gate_to_set_ops;
+ else
+ hw_init.ops = &ccu_pll_straight_set_ops;
+
+ if (!pll_init->parent_name) {
+ ret = -EINVAL;
+ goto err_free_pll;
+ }
+ parent_data.fw_name = pll_init->parent_name;
+ hw_init.parent_data = &parent_data;
+ hw_init.num_parents = 1;
+
+ ret = of_clk_hw_register(pll_init->np, &pll->hw);
+ if (ret)
+ goto err_free_pll;
+
+ return pll;
+
+err_free_pll:
+ kfree(pll);
+
+ return ERR_PTR(ret);
+}
+
+void ccu_pll_hw_unregister(struct ccu_pll *pll)
+{
+ clk_hw_unregister(&pll->hw);
+
+ kfree(pll);
+}
diff --git a/drivers/clk/baikal-t1/ccu-pll.h b/drivers/clk/baikal-t1/ccu-pll.h
new file mode 100644
index 000000000..a71bfd7b9
--- /dev/null
+++ b/drivers/clk/baikal-t1/ccu-pll.h
@@ -0,0 +1,72 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2020 BAIKAL ELECTRONICS, JSC
+ *
+ * Baikal-T1 CCU PLL interface driver
+ */
+#ifndef __CLK_BT1_CCU_PLL_H__
+#define __CLK_BT1_CCU_PLL_H__
+
+#include <linux/clk-provider.h>
+#include <linux/spinlock.h>
+#include <linux/regmap.h>
+#include <linux/bits.h>
+#include <linux/of.h>
+
+/*
+ * CCU PLL private flags
+ * @CCU_PLL_BASIC: Basic PLL required by the kernel as early as possible.
+ */
+#define CCU_PLL_BASIC BIT(0)
+
+/*
+ * struct ccu_pll_init_data - CCU PLL initialization data
+ * @id: Clock private identifier.
+ * @name: Clocks name.
+ * @parent_name: Clocks parent name in a fw node.
+ * @base: PLL registers base address with respect to the sys_regs base.
+ * @sys_regs: Baikal-T1 System Controller registers map.
+ * @np: Pointer to the node describing the CCU PLLs.
+ * @flags: PLL clock flags.
+ * @features: PLL private features.
+ */
+struct ccu_pll_init_data {
+ unsigned int id;
+ const char *name;
+ const char *parent_name;
+ unsigned int base;
+ struct regmap *sys_regs;
+ struct device_node *np;
+ unsigned long flags;
+ unsigned long features;
+};
+
+/*
+ * struct ccu_pll - CCU PLL descriptor
+ * @hw: clk_hw of the PLL.
+ * @id: Clock private identifier.
+ * @reg_ctl: PLL control register base.
+ * @reg_ctl1: PLL control1 register base.
+ * @sys_regs: Baikal-T1 System Controller registers map.
+ * @lock: PLL state change spin-lock.
+ */
+struct ccu_pll {
+ struct clk_hw hw;
+ unsigned int id;
+ unsigned int reg_ctl;
+ unsigned int reg_ctl1;
+ struct regmap *sys_regs;
+ spinlock_t lock;
+};
+#define to_ccu_pll(_hw) container_of(_hw, struct ccu_pll, hw)
+
+static inline struct clk_hw *ccu_pll_get_clk_hw(struct ccu_pll *pll)
+{
+ return pll ? &pll->hw : NULL;
+}
+
+struct ccu_pll *ccu_pll_hw_register(const struct ccu_pll_init_data *init);
+
+void ccu_pll_hw_unregister(struct ccu_pll *pll);
+
+#endif /* __CLK_BT1_CCU_PLL_H__ */
diff --git a/drivers/clk/baikal-t1/ccu-rst.c b/drivers/clk/baikal-t1/ccu-rst.c
new file mode 100644
index 000000000..40023ea67
--- /dev/null
+++ b/drivers/clk/baikal-t1/ccu-rst.c
@@ -0,0 +1,217 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2021 BAIKAL ELECTRONICS, JSC
+ *
+ * Authors:
+ * Serge Semin <Sergey.Semin@baikalelectronics.ru>
+ *
+ * Baikal-T1 CCU Resets interface driver
+ */
+
+#define pr_fmt(fmt) "bt1-ccu-rst: " fmt
+
+#include <linux/bits.h>
+#include <linux/delay.h>
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/printk.h>
+#include <linux/regmap.h>
+#include <linux/reset-controller.h>
+#include <linux/slab.h>
+
+#include <dt-bindings/reset/bt1-ccu.h>
+
+#include "ccu-rst.h"
+
+#define CCU_AXI_MAIN_BASE 0x030
+#define CCU_AXI_DDR_BASE 0x034
+#define CCU_AXI_SATA_BASE 0x038
+#define CCU_AXI_GMAC0_BASE 0x03C
+#define CCU_AXI_GMAC1_BASE 0x040
+#define CCU_AXI_XGMAC_BASE 0x044
+#define CCU_AXI_PCIE_M_BASE 0x048
+#define CCU_AXI_PCIE_S_BASE 0x04C
+#define CCU_AXI_USB_BASE 0x050
+#define CCU_AXI_HWA_BASE 0x054
+#define CCU_AXI_SRAM_BASE 0x058
+
+#define CCU_SYS_DDR_BASE 0x02c
+#define CCU_SYS_SATA_REF_BASE 0x060
+#define CCU_SYS_APB_BASE 0x064
+#define CCU_SYS_PCIE_BASE 0x144
+
+#define CCU_RST_DELAY_US 1
+
+#define CCU_RST_TRIG(_base, _ofs) \
+ { \
+ .type = CCU_RST_TRIG, \
+ .base = _base, \
+ .mask = BIT(_ofs), \
+ }
+
+#define CCU_RST_DIR(_base, _ofs) \
+ { \
+ .type = CCU_RST_DIR, \
+ .base = _base, \
+ .mask = BIT(_ofs), \
+ }
+
+struct ccu_rst_info {
+ enum ccu_rst_type type;
+ unsigned int base;
+ unsigned int mask;
+};
+
+/*
+ * Each AXI-bus clock divider is equipped with the corresponding clock-consumer
+ * domain reset (it's self-deasserted reset control).
+ */
+static const struct ccu_rst_info axi_rst_info[] = {
+ [CCU_AXI_MAIN_RST] = CCU_RST_TRIG(CCU_AXI_MAIN_BASE, 1),
+ [CCU_AXI_DDR_RST] = CCU_RST_TRIG(CCU_AXI_DDR_BASE, 1),
+ [CCU_AXI_SATA_RST] = CCU_RST_TRIG(CCU_AXI_SATA_BASE, 1),
+ [CCU_AXI_GMAC0_RST] = CCU_RST_TRIG(CCU_AXI_GMAC0_BASE, 1),
+ [CCU_AXI_GMAC1_RST] = CCU_RST_TRIG(CCU_AXI_GMAC1_BASE, 1),
+ [CCU_AXI_XGMAC_RST] = CCU_RST_TRIG(CCU_AXI_XGMAC_BASE, 1),
+ [CCU_AXI_PCIE_M_RST] = CCU_RST_TRIG(CCU_AXI_PCIE_M_BASE, 1),
+ [CCU_AXI_PCIE_S_RST] = CCU_RST_TRIG(CCU_AXI_PCIE_S_BASE, 1),
+ [CCU_AXI_USB_RST] = CCU_RST_TRIG(CCU_AXI_USB_BASE, 1),
+ [CCU_AXI_HWA_RST] = CCU_RST_TRIG(CCU_AXI_HWA_BASE, 1),
+ [CCU_AXI_SRAM_RST] = CCU_RST_TRIG(CCU_AXI_SRAM_BASE, 1),
+};
+
+/*
+ * SATA reference clock domain and APB-bus domain are connected with the
+ * sefl-deasserted reset control, which can be activated via the corresponding
+ * clock divider register. DDR and PCIe sub-domains can be reset with directly
+ * controlled reset signals. Resetting the DDR controller though won't end up
+ * well while the Linux kernel is working.
+ */
+static const struct ccu_rst_info sys_rst_info[] = {
+ [CCU_SYS_SATA_REF_RST] = CCU_RST_TRIG(CCU_SYS_SATA_REF_BASE, 1),
+ [CCU_SYS_APB_RST] = CCU_RST_TRIG(CCU_SYS_APB_BASE, 1),
+ [CCU_SYS_DDR_FULL_RST] = CCU_RST_DIR(CCU_SYS_DDR_BASE, 1),
+ [CCU_SYS_DDR_INIT_RST] = CCU_RST_DIR(CCU_SYS_DDR_BASE, 2),
+ [CCU_SYS_PCIE_PCS_PHY_RST] = CCU_RST_DIR(CCU_SYS_PCIE_BASE, 0),
+ [CCU_SYS_PCIE_PIPE0_RST] = CCU_RST_DIR(CCU_SYS_PCIE_BASE, 4),
+ [CCU_SYS_PCIE_CORE_RST] = CCU_RST_DIR(CCU_SYS_PCIE_BASE, 8),
+ [CCU_SYS_PCIE_PWR_RST] = CCU_RST_DIR(CCU_SYS_PCIE_BASE, 9),
+ [CCU_SYS_PCIE_STICKY_RST] = CCU_RST_DIR(CCU_SYS_PCIE_BASE, 10),
+ [CCU_SYS_PCIE_NSTICKY_RST] = CCU_RST_DIR(CCU_SYS_PCIE_BASE, 11),
+ [CCU_SYS_PCIE_HOT_RST] = CCU_RST_DIR(CCU_SYS_PCIE_BASE, 12),
+};
+
+static int ccu_rst_reset(struct reset_controller_dev *rcdev, unsigned long idx)
+{
+ struct ccu_rst *rst = to_ccu_rst(rcdev);
+ const struct ccu_rst_info *info = &rst->rsts_info[idx];
+
+ if (info->type != CCU_RST_TRIG)
+ return -EOPNOTSUPP;
+
+ regmap_update_bits(rst->sys_regs, info->base, info->mask, info->mask);
+
+ /* The next delay must be enough to cover all the resets. */
+ udelay(CCU_RST_DELAY_US);
+
+ return 0;
+}
+
+static int ccu_rst_set(struct reset_controller_dev *rcdev,
+ unsigned long idx, bool high)
+{
+ struct ccu_rst *rst = to_ccu_rst(rcdev);
+ const struct ccu_rst_info *info = &rst->rsts_info[idx];
+
+ if (info->type != CCU_RST_DIR)
+ return high ? -EOPNOTSUPP : 0;
+
+ return regmap_update_bits(rst->sys_regs, info->base,
+ info->mask, high ? info->mask : 0);
+}
+
+static int ccu_rst_assert(struct reset_controller_dev *rcdev,
+ unsigned long idx)
+{
+ return ccu_rst_set(rcdev, idx, true);
+}
+
+static int ccu_rst_deassert(struct reset_controller_dev *rcdev,
+ unsigned long idx)
+{
+ return ccu_rst_set(rcdev, idx, false);
+}
+
+static int ccu_rst_status(struct reset_controller_dev *rcdev,
+ unsigned long idx)
+{
+ struct ccu_rst *rst = to_ccu_rst(rcdev);
+ const struct ccu_rst_info *info = &rst->rsts_info[idx];
+ u32 val;
+
+ if (info->type != CCU_RST_DIR)
+ return -EOPNOTSUPP;
+
+ regmap_read(rst->sys_regs, info->base, &val);
+
+ return !!(val & info->mask);
+}
+
+static const struct reset_control_ops ccu_rst_ops = {
+ .reset = ccu_rst_reset,
+ .assert = ccu_rst_assert,
+ .deassert = ccu_rst_deassert,
+ .status = ccu_rst_status,
+};
+
+struct ccu_rst *ccu_rst_hw_register(const struct ccu_rst_init_data *rst_init)
+{
+ struct ccu_rst *rst;
+ int ret;
+
+ if (!rst_init)
+ return ERR_PTR(-EINVAL);
+
+ rst = kzalloc(sizeof(*rst), GFP_KERNEL);
+ if (!rst)
+ return ERR_PTR(-ENOMEM);
+
+ rst->sys_regs = rst_init->sys_regs;
+ if (of_device_is_compatible(rst_init->np, "baikal,bt1-ccu-axi")) {
+ rst->rcdev.nr_resets = ARRAY_SIZE(axi_rst_info);
+ rst->rsts_info = axi_rst_info;
+ } else if (of_device_is_compatible(rst_init->np, "baikal,bt1-ccu-sys")) {
+ rst->rcdev.nr_resets = ARRAY_SIZE(sys_rst_info);
+ rst->rsts_info = sys_rst_info;
+ } else {
+ pr_err("Incompatible DT node '%s' specified\n",
+ of_node_full_name(rst_init->np));
+ ret = -EINVAL;
+ goto err_kfree_rst;
+ }
+
+ rst->rcdev.owner = THIS_MODULE;
+ rst->rcdev.ops = &ccu_rst_ops;
+ rst->rcdev.of_node = rst_init->np;
+
+ ret = reset_controller_register(&rst->rcdev);
+ if (ret) {
+ pr_err("Couldn't register '%s' reset controller\n",
+ of_node_full_name(rst_init->np));
+ goto err_kfree_rst;
+ }
+
+ return rst;
+
+err_kfree_rst:
+ kfree(rst);
+
+ return ERR_PTR(ret);
+}
+
+void ccu_rst_hw_unregister(struct ccu_rst *rst)
+{
+ reset_controller_unregister(&rst->rcdev);
+
+ kfree(rst);
+}
diff --git a/drivers/clk/baikal-t1/ccu-rst.h b/drivers/clk/baikal-t1/ccu-rst.h
new file mode 100644
index 000000000..d6e8b2f67
--- /dev/null
+++ b/drivers/clk/baikal-t1/ccu-rst.h
@@ -0,0 +1,67 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2021 BAIKAL ELECTRONICS, JSC
+ *
+ * Baikal-T1 CCU Resets interface driver
+ */
+#ifndef __CLK_BT1_CCU_RST_H__
+#define __CLK_BT1_CCU_RST_H__
+
+#include <linux/of.h>
+#include <linux/regmap.h>
+#include <linux/reset-controller.h>
+
+struct ccu_rst_info;
+
+/*
+ * enum ccu_rst_type - CCU Reset types
+ * @CCU_RST_TRIG: Self-deasserted reset signal.
+ * @CCU_RST_DIR: Directly controlled reset signal.
+ */
+enum ccu_rst_type {
+ CCU_RST_TRIG,
+ CCU_RST_DIR,
+};
+
+/*
+ * struct ccu_rst_init_data - CCU Resets initialization data
+ * @sys_regs: Baikal-T1 System Controller registers map.
+ * @np: Pointer to the node with the System CCU block.
+ */
+struct ccu_rst_init_data {
+ struct regmap *sys_regs;
+ struct device_node *np;
+};
+
+/*
+ * struct ccu_rst - CCU Reset descriptor
+ * @rcdev: Reset controller descriptor.
+ * @sys_regs: Baikal-T1 System Controller registers map.
+ * @rsts_info: Reset flag info (base address and mask).
+ */
+struct ccu_rst {
+ struct reset_controller_dev rcdev;
+ struct regmap *sys_regs;
+ const struct ccu_rst_info *rsts_info;
+};
+#define to_ccu_rst(_rcdev) container_of(_rcdev, struct ccu_rst, rcdev)
+
+#ifdef CONFIG_CLK_BT1_CCU_RST
+
+struct ccu_rst *ccu_rst_hw_register(const struct ccu_rst_init_data *init);
+
+void ccu_rst_hw_unregister(struct ccu_rst *rst);
+
+#else
+
+static inline
+struct ccu_rst *ccu_rst_hw_register(const struct ccu_rst_init_data *init)
+{
+ return NULL;
+}
+
+static inline void ccu_rst_hw_unregister(struct ccu_rst *rst) {}
+
+#endif
+
+#endif /* __CLK_BT1_CCU_RST_H__ */
diff --git a/drivers/clk/baikal-t1/clk-ccu-div.c b/drivers/clk/baikal-t1/clk-ccu-div.c
new file mode 100644
index 000000000..0e772e034
--- /dev/null
+++ b/drivers/clk/baikal-t1/clk-ccu-div.c
@@ -0,0 +1,521 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2020 BAIKAL ELECTRONICS, JSC
+ *
+ * Authors:
+ * Serge Semin <Sergey.Semin@baikalelectronics.ru>
+ * Dmitry Dunaev <dmitry.dunaev@baikalelectronics.ru>
+ *
+ * Baikal-T1 CCU Dividers clock driver
+ */
+
+#define pr_fmt(fmt) "bt1-ccu-div: " fmt
+
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/printk.h>
+#include <linux/slab.h>
+#include <linux/clk-provider.h>
+#include <linux/reset-controller.h>
+#include <linux/mfd/syscon.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/ioport.h>
+#include <linux/regmap.h>
+
+#include <dt-bindings/clock/bt1-ccu.h>
+
+#include "ccu-div.h"
+#include "ccu-rst.h"
+
+#define CCU_AXI_MAIN_BASE 0x030
+#define CCU_AXI_DDR_BASE 0x034
+#define CCU_AXI_SATA_BASE 0x038
+#define CCU_AXI_GMAC0_BASE 0x03C
+#define CCU_AXI_GMAC1_BASE 0x040
+#define CCU_AXI_XGMAC_BASE 0x044
+#define CCU_AXI_PCIE_M_BASE 0x048
+#define CCU_AXI_PCIE_S_BASE 0x04C
+#define CCU_AXI_USB_BASE 0x050
+#define CCU_AXI_HWA_BASE 0x054
+#define CCU_AXI_SRAM_BASE 0x058
+
+#define CCU_SYS_SATA_REF_BASE 0x060
+#define CCU_SYS_APB_BASE 0x064
+#define CCU_SYS_GMAC0_BASE 0x068
+#define CCU_SYS_GMAC1_BASE 0x06C
+#define CCU_SYS_XGMAC_BASE 0x070
+#define CCU_SYS_USB_BASE 0x074
+#define CCU_SYS_PVT_BASE 0x078
+#define CCU_SYS_HWA_BASE 0x07C
+#define CCU_SYS_UART_BASE 0x084
+#define CCU_SYS_TIMER0_BASE 0x088
+#define CCU_SYS_TIMER1_BASE 0x08C
+#define CCU_SYS_TIMER2_BASE 0x090
+#define CCU_SYS_WDT_BASE 0x150
+
+#define CCU_DIV_VAR_INFO(_id, _name, _pname, _base, _width, _flags, _features) \
+ { \
+ .id = _id, \
+ .name = _name, \
+ .parent_name = _pname, \
+ .base = _base, \
+ .type = CCU_DIV_VAR, \
+ .width = _width, \
+ .flags = _flags, \
+ .features = _features \
+ }
+
+#define CCU_DIV_GATE_INFO(_id, _name, _pname, _base, _divider) \
+ { \
+ .id = _id, \
+ .name = _name, \
+ .parent_name = _pname, \
+ .base = _base, \
+ .type = CCU_DIV_GATE, \
+ .divider = _divider \
+ }
+
+#define CCU_DIV_BUF_INFO(_id, _name, _pname, _base, _flags) \
+ { \
+ .id = _id, \
+ .name = _name, \
+ .parent_name = _pname, \
+ .base = _base, \
+ .type = CCU_DIV_BUF, \
+ .flags = _flags \
+ }
+
+#define CCU_DIV_FIXED_INFO(_id, _name, _pname, _divider) \
+ { \
+ .id = _id, \
+ .name = _name, \
+ .parent_name = _pname, \
+ .type = CCU_DIV_FIXED, \
+ .divider = _divider \
+ }
+
+struct ccu_div_info {
+ unsigned int id;
+ const char *name;
+ const char *parent_name;
+ unsigned int base;
+ enum ccu_div_type type;
+ union {
+ unsigned int width;
+ unsigned int divider;
+ };
+ unsigned long flags;
+ unsigned long features;
+};
+
+struct ccu_div_data {
+ struct device_node *np;
+ struct regmap *sys_regs;
+
+ unsigned int divs_num;
+ const struct ccu_div_info *divs_info;
+ struct ccu_div **divs;
+
+ struct ccu_rst *rsts;
+};
+
+/*
+ * AXI Main Interconnect (axi_main_clk) and DDR AXI-bus (axi_ddr_clk) clocks
+ * must be left enabled in any case, since former one is responsible for
+ * clocking a bus between CPU cores and the rest of the SoC components, while
+ * the later is clocking the AXI-bus between DDR controller and the Main
+ * Interconnect. So should any of these clocks get to be disabled, the system
+ * will literally stop working. That's why we marked them as critical.
+ */
+static const struct ccu_div_info axi_info[] = {
+ CCU_DIV_VAR_INFO(CCU_AXI_MAIN_CLK, "axi_main_clk", "pcie_clk",
+ CCU_AXI_MAIN_BASE, 4,
+ CLK_IS_CRITICAL, CCU_DIV_RESET_DOMAIN),
+ CCU_DIV_VAR_INFO(CCU_AXI_DDR_CLK, "axi_ddr_clk", "sata_clk",
+ CCU_AXI_DDR_BASE, 4,
+ CLK_IS_CRITICAL | CLK_SET_RATE_GATE,
+ CCU_DIV_RESET_DOMAIN),
+ CCU_DIV_VAR_INFO(CCU_AXI_SATA_CLK, "axi_sata_clk", "sata_clk",
+ CCU_AXI_SATA_BASE, 4,
+ CLK_SET_RATE_GATE, CCU_DIV_RESET_DOMAIN),
+ CCU_DIV_VAR_INFO(CCU_AXI_GMAC0_CLK, "axi_gmac0_clk", "eth_clk",
+ CCU_AXI_GMAC0_BASE, 4,
+ CLK_SET_RATE_GATE, CCU_DIV_RESET_DOMAIN),
+ CCU_DIV_VAR_INFO(CCU_AXI_GMAC1_CLK, "axi_gmac1_clk", "eth_clk",
+ CCU_AXI_GMAC1_BASE, 4,
+ CLK_SET_RATE_GATE, CCU_DIV_RESET_DOMAIN),
+ CCU_DIV_VAR_INFO(CCU_AXI_XGMAC_CLK, "axi_xgmac_clk", "eth_clk",
+ CCU_AXI_XGMAC_BASE, 4,
+ CLK_SET_RATE_GATE, CCU_DIV_RESET_DOMAIN),
+ CCU_DIV_VAR_INFO(CCU_AXI_PCIE_M_CLK, "axi_pcie_m_clk", "pcie_clk",
+ CCU_AXI_PCIE_M_BASE, 4,
+ CLK_SET_RATE_GATE, CCU_DIV_RESET_DOMAIN),
+ CCU_DIV_VAR_INFO(CCU_AXI_PCIE_S_CLK, "axi_pcie_s_clk", "pcie_clk",
+ CCU_AXI_PCIE_S_BASE, 4,
+ CLK_SET_RATE_GATE, CCU_DIV_RESET_DOMAIN),
+ CCU_DIV_VAR_INFO(CCU_AXI_USB_CLK, "axi_usb_clk", "sata_clk",
+ CCU_AXI_USB_BASE, 4,
+ CLK_SET_RATE_GATE, CCU_DIV_RESET_DOMAIN),
+ CCU_DIV_VAR_INFO(CCU_AXI_HWA_CLK, "axi_hwa_clk", "sata_clk",
+ CCU_AXI_HWA_BASE, 4,
+ CLK_SET_RATE_GATE, CCU_DIV_RESET_DOMAIN),
+ CCU_DIV_VAR_INFO(CCU_AXI_SRAM_CLK, "axi_sram_clk", "eth_clk",
+ CCU_AXI_SRAM_BASE, 4,
+ CLK_SET_RATE_GATE, CCU_DIV_RESET_DOMAIN)
+};
+
+/*
+ * APB-bus clock is marked as critical since it's a main communication bus
+ * for the SoC devices registers IO-operations.
+ */
+static const struct ccu_div_info sys_info[] = {
+ CCU_DIV_VAR_INFO(CCU_SYS_SATA_CLK, "sys_sata_clk",
+ "sata_clk", CCU_SYS_SATA_REF_BASE, 4,
+ CLK_SET_RATE_GATE,
+ CCU_DIV_SKIP_ONE | CCU_DIV_LOCK_SHIFTED |
+ CCU_DIV_RESET_DOMAIN),
+ CCU_DIV_BUF_INFO(CCU_SYS_SATA_REF_CLK, "sys_sata_ref_clk",
+ "sys_sata_clk", CCU_SYS_SATA_REF_BASE,
+ CLK_SET_RATE_PARENT),
+ CCU_DIV_VAR_INFO(CCU_SYS_APB_CLK, "sys_apb_clk",
+ "pcie_clk", CCU_SYS_APB_BASE, 5,
+ CLK_IS_CRITICAL, CCU_DIV_BASIC | CCU_DIV_RESET_DOMAIN),
+ CCU_DIV_GATE_INFO(CCU_SYS_GMAC0_TX_CLK, "sys_gmac0_tx_clk",
+ "eth_clk", CCU_SYS_GMAC0_BASE, 5),
+ CCU_DIV_FIXED_INFO(CCU_SYS_GMAC0_PTP_CLK, "sys_gmac0_ptp_clk",
+ "eth_clk", 10),
+ CCU_DIV_GATE_INFO(CCU_SYS_GMAC1_TX_CLK, "sys_gmac1_tx_clk",
+ "eth_clk", CCU_SYS_GMAC1_BASE, 5),
+ CCU_DIV_FIXED_INFO(CCU_SYS_GMAC1_PTP_CLK, "sys_gmac1_ptp_clk",
+ "eth_clk", 10),
+ CCU_DIV_GATE_INFO(CCU_SYS_XGMAC_CLK, "sys_xgmac_clk",
+ "eth_clk", CCU_SYS_XGMAC_BASE, 1),
+ CCU_DIV_FIXED_INFO(CCU_SYS_XGMAC_REF_CLK, "sys_xgmac_ref_clk",
+ "sys_xgmac_clk", 8),
+ CCU_DIV_FIXED_INFO(CCU_SYS_XGMAC_PTP_CLK, "sys_xgmac_ptp_clk",
+ "sys_xgmac_clk", 8),
+ CCU_DIV_GATE_INFO(CCU_SYS_USB_CLK, "sys_usb_clk",
+ "eth_clk", CCU_SYS_USB_BASE, 10),
+ CCU_DIV_VAR_INFO(CCU_SYS_PVT_CLK, "sys_pvt_clk",
+ "ref_clk", CCU_SYS_PVT_BASE, 5,
+ CLK_SET_RATE_GATE, 0),
+ CCU_DIV_VAR_INFO(CCU_SYS_HWA_CLK, "sys_hwa_clk",
+ "sata_clk", CCU_SYS_HWA_BASE, 4,
+ CLK_SET_RATE_GATE, 0),
+ CCU_DIV_VAR_INFO(CCU_SYS_UART_CLK, "sys_uart_clk",
+ "eth_clk", CCU_SYS_UART_BASE, 17,
+ CLK_SET_RATE_GATE, 0),
+ CCU_DIV_FIXED_INFO(CCU_SYS_I2C1_CLK, "sys_i2c1_clk",
+ "eth_clk", 10),
+ CCU_DIV_FIXED_INFO(CCU_SYS_I2C2_CLK, "sys_i2c2_clk",
+ "eth_clk", 10),
+ CCU_DIV_FIXED_INFO(CCU_SYS_GPIO_CLK, "sys_gpio_clk",
+ "ref_clk", 25),
+ CCU_DIV_VAR_INFO(CCU_SYS_TIMER0_CLK, "sys_timer0_clk",
+ "ref_clk", CCU_SYS_TIMER0_BASE, 17,
+ CLK_SET_RATE_GATE, CCU_DIV_BASIC),
+ CCU_DIV_VAR_INFO(CCU_SYS_TIMER1_CLK, "sys_timer1_clk",
+ "ref_clk", CCU_SYS_TIMER1_BASE, 17,
+ CLK_SET_RATE_GATE, CCU_DIV_BASIC),
+ CCU_DIV_VAR_INFO(CCU_SYS_TIMER2_CLK, "sys_timer2_clk",
+ "ref_clk", CCU_SYS_TIMER2_BASE, 17,
+ CLK_SET_RATE_GATE, CCU_DIV_BASIC),
+ CCU_DIV_VAR_INFO(CCU_SYS_WDT_CLK, "sys_wdt_clk",
+ "eth_clk", CCU_SYS_WDT_BASE, 17,
+ CLK_SET_RATE_GATE, CCU_DIV_SKIP_ONE_TO_THREE)
+};
+
+static struct ccu_div_data *axi_data;
+static struct ccu_div_data *sys_data;
+
+static void ccu_div_set_data(struct ccu_div_data *data)
+{
+ struct device_node *np = data->np;
+
+ if (of_device_is_compatible(np, "baikal,bt1-ccu-axi"))
+ axi_data = data;
+ else if (of_device_is_compatible(np, "baikal,bt1-ccu-sys"))
+ sys_data = data;
+ else
+ pr_err("Invalid DT node '%s' specified\n", of_node_full_name(np));
+}
+
+static struct ccu_div_data *ccu_div_get_data(struct device_node *np)
+{
+ if (of_device_is_compatible(np, "baikal,bt1-ccu-axi"))
+ return axi_data;
+ else if (of_device_is_compatible(np, "baikal,bt1-ccu-sys"))
+ return sys_data;
+
+ pr_err("Invalid DT node '%s' specified\n", of_node_full_name(np));
+
+ return NULL;
+}
+
+static struct ccu_div *ccu_div_find_desc(struct ccu_div_data *data,
+ unsigned int clk_id)
+{
+ int idx;
+
+ for (idx = 0; idx < data->divs_num; ++idx) {
+ if (data->divs_info[idx].id == clk_id)
+ return data->divs[idx];
+ }
+
+ return ERR_PTR(-EINVAL);
+}
+
+static struct ccu_div_data *ccu_div_create_data(struct device_node *np)
+{
+ struct ccu_div_data *data;
+ int ret;
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return ERR_PTR(-ENOMEM);
+
+ data->np = np;
+ if (of_device_is_compatible(np, "baikal,bt1-ccu-axi")) {
+ data->divs_num = ARRAY_SIZE(axi_info);
+ data->divs_info = axi_info;
+ } else if (of_device_is_compatible(np, "baikal,bt1-ccu-sys")) {
+ data->divs_num = ARRAY_SIZE(sys_info);
+ data->divs_info = sys_info;
+ } else {
+ pr_err("Incompatible DT node '%s' specified\n",
+ of_node_full_name(np));
+ ret = -EINVAL;
+ goto err_kfree_data;
+ }
+
+ data->divs = kcalloc(data->divs_num, sizeof(*data->divs), GFP_KERNEL);
+ if (!data->divs) {
+ ret = -ENOMEM;
+ goto err_kfree_data;
+ }
+
+ return data;
+
+err_kfree_data:
+ kfree(data);
+
+ return ERR_PTR(ret);
+}
+
+static void ccu_div_free_data(struct ccu_div_data *data)
+{
+ kfree(data->divs);
+
+ kfree(data);
+}
+
+static int ccu_div_find_sys_regs(struct ccu_div_data *data)
+{
+ data->sys_regs = syscon_node_to_regmap(data->np->parent);
+ if (IS_ERR(data->sys_regs)) {
+ pr_err("Failed to find syscon regs for '%s'\n",
+ of_node_full_name(data->np));
+ return PTR_ERR(data->sys_regs);
+ }
+
+ return 0;
+}
+
+static struct clk_hw *ccu_div_of_clk_hw_get(struct of_phandle_args *clkspec,
+ void *priv)
+{
+ struct ccu_div_data *data = priv;
+ struct ccu_div *div;
+ unsigned int clk_id;
+
+ clk_id = clkspec->args[0];
+ div = ccu_div_find_desc(data, clk_id);
+ if (IS_ERR(div)) {
+ if (div != ERR_PTR(-EPROBE_DEFER))
+ pr_info("Invalid clock ID %d specified\n", clk_id);
+
+ return ERR_CAST(div);
+ }
+
+ return ccu_div_get_clk_hw(div);
+}
+
+static int ccu_div_clk_register(struct ccu_div_data *data, bool defer)
+{
+ int idx, ret;
+
+ for (idx = 0; idx < data->divs_num; ++idx) {
+ const struct ccu_div_info *info = &data->divs_info[idx];
+ struct ccu_div_init_data init = {0};
+
+ if (!!(info->features & CCU_DIV_BASIC) ^ defer) {
+ if (!data->divs[idx])
+ data->divs[idx] = ERR_PTR(-EPROBE_DEFER);
+
+ continue;
+ }
+
+ init.id = info->id;
+ init.name = info->name;
+ init.parent_name = info->parent_name;
+ init.np = data->np;
+ init.type = info->type;
+ init.flags = info->flags;
+ init.features = info->features;
+
+ if (init.type == CCU_DIV_VAR) {
+ init.base = info->base;
+ init.sys_regs = data->sys_regs;
+ init.width = info->width;
+ } else if (init.type == CCU_DIV_GATE) {
+ init.base = info->base;
+ init.sys_regs = data->sys_regs;
+ init.divider = info->divider;
+ } else if (init.type == CCU_DIV_BUF) {
+ init.base = info->base;
+ init.sys_regs = data->sys_regs;
+ } else {
+ init.divider = info->divider;
+ }
+
+ data->divs[idx] = ccu_div_hw_register(&init);
+ if (IS_ERR(data->divs[idx])) {
+ ret = PTR_ERR(data->divs[idx]);
+ pr_err("Couldn't register divider '%s' hw\n",
+ init.name);
+ goto err_hw_unregister;
+ }
+ }
+
+ return 0;
+
+err_hw_unregister:
+ for (--idx; idx >= 0; --idx) {
+ if (!!(data->divs_info[idx].features & CCU_DIV_BASIC) ^ defer)
+ continue;
+
+ ccu_div_hw_unregister(data->divs[idx]);
+ }
+
+ return ret;
+}
+
+static void ccu_div_clk_unregister(struct ccu_div_data *data, bool defer)
+{
+ int idx;
+
+ /* Uninstall only the clocks registered on the specfied stage */
+ for (idx = 0; idx < data->divs_num; ++idx) {
+ if (!!(data->divs_info[idx].features & CCU_DIV_BASIC) ^ defer)
+ continue;
+
+ ccu_div_hw_unregister(data->divs[idx]);
+ }
+}
+
+static int ccu_div_of_register(struct ccu_div_data *data)
+{
+ int ret;
+
+ ret = of_clk_add_hw_provider(data->np, ccu_div_of_clk_hw_get, data);
+ if (ret) {
+ pr_err("Couldn't register dividers '%s' clock provider\n",
+ of_node_full_name(data->np));
+ }
+
+ return ret;
+}
+
+static int ccu_div_rst_register(struct ccu_div_data *data)
+{
+ struct ccu_rst_init_data init = {0};
+
+ init.sys_regs = data->sys_regs;
+ init.np = data->np;
+
+ data->rsts = ccu_rst_hw_register(&init);
+ if (IS_ERR(data->rsts)) {
+ pr_err("Couldn't register divider '%s' reset controller\n",
+ of_node_full_name(data->np));
+ return PTR_ERR(data->rsts);
+ }
+
+ return 0;
+}
+
+static int ccu_div_probe(struct platform_device *pdev)
+{
+ struct ccu_div_data *data;
+ int ret;
+
+ data = ccu_div_get_data(dev_of_node(&pdev->dev));
+ if (!data)
+ return -EINVAL;
+
+ ret = ccu_div_clk_register(data, false);
+ if (ret)
+ return ret;
+
+ ret = ccu_div_rst_register(data);
+ if (ret)
+ goto err_clk_unregister;
+
+ return 0;
+
+err_clk_unregister:
+ ccu_div_clk_unregister(data, false);
+
+ return ret;
+}
+
+static const struct of_device_id ccu_div_of_match[] = {
+ { .compatible = "baikal,bt1-ccu-axi" },
+ { .compatible = "baikal,bt1-ccu-sys" },
+ { }
+};
+
+static struct platform_driver ccu_div_driver = {
+ .probe = ccu_div_probe,
+ .driver = {
+ .name = "clk-ccu-div",
+ .of_match_table = ccu_div_of_match,
+ .suppress_bind_attrs = true,
+ },
+};
+builtin_platform_driver(ccu_div_driver);
+
+static __init void ccu_div_init(struct device_node *np)
+{
+ struct ccu_div_data *data;
+ int ret;
+
+ data = ccu_div_create_data(np);
+ if (IS_ERR(data))
+ return;
+
+ ret = ccu_div_find_sys_regs(data);
+ if (ret)
+ goto err_free_data;
+
+ ret = ccu_div_clk_register(data, true);
+ if (ret)
+ goto err_free_data;
+
+ ret = ccu_div_of_register(data);
+ if (ret)
+ goto err_clk_unregister;
+
+ ccu_div_set_data(data);
+
+ return;
+
+err_clk_unregister:
+ ccu_div_clk_unregister(data, true);
+
+err_free_data:
+ ccu_div_free_data(data);
+}
+CLK_OF_DECLARE_DRIVER(ccu_axi, "baikal,bt1-ccu-axi", ccu_div_init);
+CLK_OF_DECLARE_DRIVER(ccu_sys, "baikal,bt1-ccu-sys", ccu_div_init);
diff --git a/drivers/clk/baikal-t1/clk-ccu-pll.c b/drivers/clk/baikal-t1/clk-ccu-pll.c
new file mode 100644
index 000000000..fce02ce77
--- /dev/null
+++ b/drivers/clk/baikal-t1/clk-ccu-pll.c
@@ -0,0 +1,277 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2020 BAIKAL ELECTRONICS, JSC
+ *
+ * Authors:
+ * Serge Semin <Sergey.Semin@baikalelectronics.ru>
+ * Dmitry Dunaev <dmitry.dunaev@baikalelectronics.ru>
+ *
+ * Baikal-T1 CCU PLL clocks driver
+ */
+
+#define pr_fmt(fmt) "bt1-ccu-pll: " fmt
+
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/printk.h>
+#include <linux/slab.h>
+#include <linux/clk-provider.h>
+#include <linux/mfd/syscon.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/ioport.h>
+#include <linux/regmap.h>
+
+#include <dt-bindings/clock/bt1-ccu.h>
+
+#include "ccu-pll.h"
+
+#define CCU_CPU_PLL_BASE 0x000
+#define CCU_SATA_PLL_BASE 0x008
+#define CCU_DDR_PLL_BASE 0x010
+#define CCU_PCIE_PLL_BASE 0x018
+#define CCU_ETH_PLL_BASE 0x020
+
+#define CCU_PLL_INFO(_id, _name, _pname, _base, _flags, _features) \
+ { \
+ .id = _id, \
+ .name = _name, \
+ .parent_name = _pname, \
+ .base = _base, \
+ .flags = _flags, \
+ .features = _features, \
+ }
+
+#define CCU_PLL_NUM ARRAY_SIZE(pll_info)
+
+struct ccu_pll_info {
+ unsigned int id;
+ const char *name;
+ const char *parent_name;
+ unsigned int base;
+ unsigned long flags;
+ unsigned long features;
+};
+
+/*
+ * Alas we have to mark all PLLs as critical. CPU and DDR PLLs are sources of
+ * CPU cores and DDR controller reference clocks, due to which they obviously
+ * shouldn't be ever gated. SATA and PCIe PLLs are the parents of APB-bus and
+ * DDR controller AXI-bus clocks. If they are gated the system will be
+ * unusable. Moreover disabling SATA and Ethernet PLLs causes automatic reset
+ * of the corresponding subsystems. So until we aren't ready to re-initialize
+ * all the devices consuming those PLLs, they will be marked as critical too.
+ */
+static const struct ccu_pll_info pll_info[] = {
+ CCU_PLL_INFO(CCU_CPU_PLL, "cpu_pll", "ref_clk", CCU_CPU_PLL_BASE,
+ CLK_IS_CRITICAL, CCU_PLL_BASIC),
+ CCU_PLL_INFO(CCU_SATA_PLL, "sata_pll", "ref_clk", CCU_SATA_PLL_BASE,
+ CLK_IS_CRITICAL | CLK_SET_RATE_GATE, 0),
+ CCU_PLL_INFO(CCU_DDR_PLL, "ddr_pll", "ref_clk", CCU_DDR_PLL_BASE,
+ CLK_IS_CRITICAL | CLK_SET_RATE_GATE, 0),
+ CCU_PLL_INFO(CCU_PCIE_PLL, "pcie_pll", "ref_clk", CCU_PCIE_PLL_BASE,
+ CLK_IS_CRITICAL, CCU_PLL_BASIC),
+ CCU_PLL_INFO(CCU_ETH_PLL, "eth_pll", "ref_clk", CCU_ETH_PLL_BASE,
+ CLK_IS_CRITICAL | CLK_SET_RATE_GATE, 0)
+};
+
+struct ccu_pll_data {
+ struct device_node *np;
+ struct regmap *sys_regs;
+ struct ccu_pll *plls[CCU_PLL_NUM];
+};
+
+static struct ccu_pll_data *pll_data;
+
+static struct ccu_pll *ccu_pll_find_desc(struct ccu_pll_data *data,
+ unsigned int clk_id)
+{
+ int idx;
+
+ for (idx = 0; idx < CCU_PLL_NUM; ++idx) {
+ if (pll_info[idx].id == clk_id)
+ return data->plls[idx];
+ }
+
+ return ERR_PTR(-EINVAL);
+}
+
+static struct ccu_pll_data *ccu_pll_create_data(struct device_node *np)
+{
+ struct ccu_pll_data *data;
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return ERR_PTR(-ENOMEM);
+
+ data->np = np;
+
+ return data;
+}
+
+static void ccu_pll_free_data(struct ccu_pll_data *data)
+{
+ kfree(data);
+}
+
+static int ccu_pll_find_sys_regs(struct ccu_pll_data *data)
+{
+ data->sys_regs = syscon_node_to_regmap(data->np->parent);
+ if (IS_ERR(data->sys_regs)) {
+ pr_err("Failed to find syscon regs for '%s'\n",
+ of_node_full_name(data->np));
+ return PTR_ERR(data->sys_regs);
+ }
+
+ return 0;
+}
+
+static struct clk_hw *ccu_pll_of_clk_hw_get(struct of_phandle_args *clkspec,
+ void *priv)
+{
+ struct ccu_pll_data *data = priv;
+ struct ccu_pll *pll;
+ unsigned int clk_id;
+
+ clk_id = clkspec->args[0];
+ pll = ccu_pll_find_desc(data, clk_id);
+ if (IS_ERR(pll)) {
+ if (pll != ERR_PTR(-EPROBE_DEFER))
+ pr_info("Invalid PLL clock ID %d specified\n", clk_id);
+
+ return ERR_CAST(pll);
+ }
+
+ return ccu_pll_get_clk_hw(pll);
+}
+
+static int ccu_pll_clk_register(struct ccu_pll_data *data, bool defer)
+{
+ int idx, ret;
+
+ for (idx = 0; idx < CCU_PLL_NUM; ++idx) {
+ const struct ccu_pll_info *info = &pll_info[idx];
+ struct ccu_pll_init_data init = {0};
+
+ /* Defer non-basic PLLs allocation for the probe stage */
+ if (!!(info->features & CCU_PLL_BASIC) ^ defer) {
+ if (!data->plls[idx])
+ data->plls[idx] = ERR_PTR(-EPROBE_DEFER);
+
+ continue;
+ }
+
+ init.id = info->id;
+ init.name = info->name;
+ init.parent_name = info->parent_name;
+ init.base = info->base;
+ init.sys_regs = data->sys_regs;
+ init.np = data->np;
+ init.flags = info->flags;
+ init.features = info->features;
+
+ data->plls[idx] = ccu_pll_hw_register(&init);
+ if (IS_ERR(data->plls[idx])) {
+ ret = PTR_ERR(data->plls[idx]);
+ pr_err("Couldn't register PLL hw '%s'\n",
+ init.name);
+ goto err_hw_unregister;
+ }
+ }
+
+ return 0;
+
+err_hw_unregister:
+ for (--idx; idx >= 0; --idx) {
+ if (!!(pll_info[idx].features & CCU_PLL_BASIC) ^ defer)
+ continue;
+
+ ccu_pll_hw_unregister(data->plls[idx]);
+ }
+
+ return ret;
+}
+
+static void ccu_pll_clk_unregister(struct ccu_pll_data *data, bool defer)
+{
+ int idx;
+
+ /* Uninstall only the clocks registered on the specfied stage */
+ for (idx = 0; idx < CCU_PLL_NUM; ++idx) {
+ if (!!(pll_info[idx].features & CCU_PLL_BASIC) ^ defer)
+ continue;
+
+ ccu_pll_hw_unregister(data->plls[idx]);
+ }
+}
+
+static int ccu_pll_of_register(struct ccu_pll_data *data)
+{
+ int ret;
+
+ ret = of_clk_add_hw_provider(data->np, ccu_pll_of_clk_hw_get, data);
+ if (ret) {
+ pr_err("Couldn't register PLL provider of '%s'\n",
+ of_node_full_name(data->np));
+ }
+
+ return ret;
+}
+
+static int ccu_pll_probe(struct platform_device *pdev)
+{
+ struct ccu_pll_data *data = pll_data;
+
+ if (!data)
+ return -EINVAL;
+
+ return ccu_pll_clk_register(data, false);
+}
+
+static const struct of_device_id ccu_pll_of_match[] = {
+ { .compatible = "baikal,bt1-ccu-pll" },
+ { }
+};
+
+static struct platform_driver ccu_pll_driver = {
+ .probe = ccu_pll_probe,
+ .driver = {
+ .name = "clk-ccu-pll",
+ .of_match_table = ccu_pll_of_match,
+ .suppress_bind_attrs = true,
+ },
+};
+builtin_platform_driver(ccu_pll_driver);
+
+static __init void ccu_pll_init(struct device_node *np)
+{
+ struct ccu_pll_data *data;
+ int ret;
+
+ data = ccu_pll_create_data(np);
+ if (IS_ERR(data))
+ return;
+
+ ret = ccu_pll_find_sys_regs(data);
+ if (ret)
+ goto err_free_data;
+
+ ret = ccu_pll_clk_register(data, true);
+ if (ret)
+ goto err_free_data;
+
+ ret = ccu_pll_of_register(data);
+ if (ret)
+ goto err_clk_unregister;
+
+ pll_data = data;
+
+ return;
+
+err_clk_unregister:
+ ccu_pll_clk_unregister(data, true);
+
+err_free_data:
+ ccu_pll_free_data(data);
+}
+CLK_OF_DECLARE_DRIVER(ccu_pll, "baikal,bt1-ccu-pll", ccu_pll_init);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-06 23:21:00 +0000