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-rw-r--r--drivers/clk/microchip/Kconfig11
-rw-r--r--drivers/clk/microchip/Makefile5
-rw-r--r--drivers/clk/microchip/clk-core.c1028
-rw-r--r--drivers/clk/microchip/clk-core.h76
-rw-r--r--drivers/clk/microchip/clk-mpfs-ccc.c294
-rw-r--r--drivers/clk/microchip/clk-mpfs.c515
-rw-r--r--drivers/clk/microchip/clk-pic32mzda.c269
7 files changed, 2198 insertions, 0 deletions
diff --git a/drivers/clk/microchip/Kconfig b/drivers/clk/microchip/Kconfig
new file mode 100644
index 000000000..b46e864b3
--- /dev/null
+++ b/drivers/clk/microchip/Kconfig
@@ -0,0 +1,11 @@
+# SPDX-License-Identifier: GPL-2.0
+
+config COMMON_CLK_PIC32
+ def_bool COMMON_CLK && MACH_PIC32
+
+config MCHP_CLK_MPFS
+ bool "Clk driver for PolarFire SoC"
+ depends on (RISCV && SOC_MICROCHIP_POLARFIRE) || COMPILE_TEST
+ select AUXILIARY_BUS
+ help
+ Supports Clock Configuration for PolarFire SoC
diff --git a/drivers/clk/microchip/Makefile b/drivers/clk/microchip/Makefile
new file mode 100644
index 000000000..13250e04e
--- /dev/null
+++ b/drivers/clk/microchip/Makefile
@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0-only
+obj-$(CONFIG_COMMON_CLK_PIC32) += clk-core.o
+obj-$(CONFIG_PIC32MZDA) += clk-pic32mzda.o
+obj-$(CONFIG_MCHP_CLK_MPFS) += clk-mpfs.o
+obj-$(CONFIG_MCHP_CLK_MPFS) += clk-mpfs-ccc.o
diff --git a/drivers/clk/microchip/clk-core.c b/drivers/clk/microchip/clk-core.c
new file mode 100644
index 000000000..1b4f023cd
--- /dev/null
+++ b/drivers/clk/microchip/clk-core.c
@@ -0,0 +1,1028 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Purna Chandra Mandal,<purna.mandal@microchip.com>
+ * Copyright (C) 2015 Microchip Technology Inc. All rights reserved.
+ */
+#include <linux/clk-provider.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <asm/mach-pic32/pic32.h>
+#include <asm/traps.h>
+
+#include "clk-core.h"
+
+/* OSCCON Reg fields */
+#define OSC_CUR_MASK 0x07
+#define OSC_CUR_SHIFT 12
+#define OSC_NEW_MASK 0x07
+#define OSC_NEW_SHIFT 8
+#define OSC_SWEN BIT(0)
+
+/* SPLLCON Reg fields */
+#define PLL_RANGE_MASK 0x07
+#define PLL_RANGE_SHIFT 0
+#define PLL_ICLK_MASK 0x01
+#define PLL_ICLK_SHIFT 7
+#define PLL_IDIV_MASK 0x07
+#define PLL_IDIV_SHIFT 8
+#define PLL_ODIV_MASK 0x07
+#define PLL_ODIV_SHIFT 24
+#define PLL_MULT_MASK 0x7F
+#define PLL_MULT_SHIFT 16
+#define PLL_MULT_MAX 128
+#define PLL_ODIV_MIN 1
+#define PLL_ODIV_MAX 5
+
+/* Peripheral Bus Clock Reg Fields */
+#define PB_DIV_MASK 0x7f
+#define PB_DIV_SHIFT 0
+#define PB_DIV_READY BIT(11)
+#define PB_DIV_ENABLE BIT(15)
+#define PB_DIV_MAX 128
+#define PB_DIV_MIN 0
+
+/* Reference Oscillator Control Reg fields */
+#define REFO_SEL_MASK 0x0f
+#define REFO_SEL_SHIFT 0
+#define REFO_ACTIVE BIT(8)
+#define REFO_DIVSW_EN BIT(9)
+#define REFO_OE BIT(12)
+#define REFO_ON BIT(15)
+#define REFO_DIV_SHIFT 16
+#define REFO_DIV_MASK 0x7fff
+
+/* Reference Oscillator Trim Register Fields */
+#define REFO_TRIM_REG 0x10
+#define REFO_TRIM_MASK 0x1ff
+#define REFO_TRIM_SHIFT 23
+#define REFO_TRIM_MAX 511
+
+/* Mux Slew Control Register fields */
+#define SLEW_BUSY BIT(0)
+#define SLEW_DOWNEN BIT(1)
+#define SLEW_UPEN BIT(2)
+#define SLEW_DIV 0x07
+#define SLEW_DIV_SHIFT 8
+#define SLEW_SYSDIV 0x0f
+#define SLEW_SYSDIV_SHIFT 20
+
+/* Clock Poll Timeout */
+#define LOCK_TIMEOUT_US USEC_PER_MSEC
+
+/* SoC specific clock needed during SPLL clock rate switch */
+static struct clk_hw *pic32_sclk_hw;
+
+/* add instruction pipeline delay while CPU clock is in-transition. */
+#define cpu_nop5() \
+do { \
+ __asm__ __volatile__("nop"); \
+ __asm__ __volatile__("nop"); \
+ __asm__ __volatile__("nop"); \
+ __asm__ __volatile__("nop"); \
+ __asm__ __volatile__("nop"); \
+} while (0)
+
+/* Perpheral bus clocks */
+struct pic32_periph_clk {
+ struct clk_hw hw;
+ void __iomem *ctrl_reg;
+ struct pic32_clk_common *core;
+};
+
+#define clkhw_to_pbclk(_hw) container_of(_hw, struct pic32_periph_clk, hw)
+
+static int pbclk_is_enabled(struct clk_hw *hw)
+{
+ struct pic32_periph_clk *pb = clkhw_to_pbclk(hw);
+
+ return readl(pb->ctrl_reg) & PB_DIV_ENABLE;
+}
+
+static int pbclk_enable(struct clk_hw *hw)
+{
+ struct pic32_periph_clk *pb = clkhw_to_pbclk(hw);
+
+ writel(PB_DIV_ENABLE, PIC32_SET(pb->ctrl_reg));
+ return 0;
+}
+
+static void pbclk_disable(struct clk_hw *hw)
+{
+ struct pic32_periph_clk *pb = clkhw_to_pbclk(hw);
+
+ writel(PB_DIV_ENABLE, PIC32_CLR(pb->ctrl_reg));
+}
+
+static unsigned long calc_best_divided_rate(unsigned long rate,
+ unsigned long parent_rate,
+ u32 divider_max,
+ u32 divider_min)
+{
+ unsigned long divided_rate, divided_rate_down, best_rate;
+ unsigned long div, div_up;
+
+ /* eq. clk_rate = parent_rate / divider.
+ *
+ * Find best divider to produce closest of target divided rate.
+ */
+ div = parent_rate / rate;
+ div = clamp_val(div, divider_min, divider_max);
+ div_up = clamp_val(div + 1, divider_min, divider_max);
+
+ divided_rate = parent_rate / div;
+ divided_rate_down = parent_rate / div_up;
+ if (abs(rate - divided_rate_down) < abs(rate - divided_rate))
+ best_rate = divided_rate_down;
+ else
+ best_rate = divided_rate;
+
+ return best_rate;
+}
+
+static inline u32 pbclk_read_pbdiv(struct pic32_periph_clk *pb)
+{
+ return ((readl(pb->ctrl_reg) >> PB_DIV_SHIFT) & PB_DIV_MASK) + 1;
+}
+
+static unsigned long pbclk_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct pic32_periph_clk *pb = clkhw_to_pbclk(hw);
+
+ return parent_rate / pbclk_read_pbdiv(pb);
+}
+
+static long pbclk_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *parent_rate)
+{
+ return calc_best_divided_rate(rate, *parent_rate,
+ PB_DIV_MAX, PB_DIV_MIN);
+}
+
+static int pbclk_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct pic32_periph_clk *pb = clkhw_to_pbclk(hw);
+ unsigned long flags;
+ u32 v, div;
+ int err;
+
+ /* check & wait for DIV_READY */
+ err = readl_poll_timeout(pb->ctrl_reg, v, v & PB_DIV_READY,
+ 1, LOCK_TIMEOUT_US);
+ if (err)
+ return err;
+
+ /* calculate clkdiv and best rate */
+ div = DIV_ROUND_CLOSEST(parent_rate, rate);
+
+ spin_lock_irqsave(&pb->core->reg_lock, flags);
+
+ /* apply new div */
+ v = readl(pb->ctrl_reg);
+ v &= ~PB_DIV_MASK;
+ v |= (div - 1);
+
+ pic32_syskey_unlock();
+
+ writel(v, pb->ctrl_reg);
+
+ spin_unlock_irqrestore(&pb->core->reg_lock, flags);
+
+ /* wait again for DIV_READY */
+ err = readl_poll_timeout(pb->ctrl_reg, v, v & PB_DIV_READY,
+ 1, LOCK_TIMEOUT_US);
+ if (err)
+ return err;
+
+ /* confirm that new div is applied correctly */
+ return (pbclk_read_pbdiv(pb) == div) ? 0 : -EBUSY;
+}
+
+const struct clk_ops pic32_pbclk_ops = {
+ .enable = pbclk_enable,
+ .disable = pbclk_disable,
+ .is_enabled = pbclk_is_enabled,
+ .recalc_rate = pbclk_recalc_rate,
+ .round_rate = pbclk_round_rate,
+ .set_rate = pbclk_set_rate,
+};
+
+struct clk *pic32_periph_clk_register(const struct pic32_periph_clk_data *desc,
+ struct pic32_clk_common *core)
+{
+ struct pic32_periph_clk *pbclk;
+ struct clk *clk;
+
+ pbclk = devm_kzalloc(core->dev, sizeof(*pbclk), GFP_KERNEL);
+ if (!pbclk)
+ return ERR_PTR(-ENOMEM);
+
+ pbclk->hw.init = &desc->init_data;
+ pbclk->core = core;
+ pbclk->ctrl_reg = desc->ctrl_reg + core->iobase;
+
+ clk = devm_clk_register(core->dev, &pbclk->hw);
+ if (IS_ERR(clk)) {
+ dev_err(core->dev, "%s: clk_register() failed\n", __func__);
+ devm_kfree(core->dev, pbclk);
+ }
+
+ return clk;
+}
+
+/* Reference oscillator operations */
+struct pic32_ref_osc {
+ struct clk_hw hw;
+ void __iomem *ctrl_reg;
+ const u32 *parent_map;
+ struct pic32_clk_common *core;
+};
+
+#define clkhw_to_refosc(_hw) container_of(_hw, struct pic32_ref_osc, hw)
+
+static int roclk_is_enabled(struct clk_hw *hw)
+{
+ struct pic32_ref_osc *refo = clkhw_to_refosc(hw);
+
+ return readl(refo->ctrl_reg) & REFO_ON;
+}
+
+static int roclk_enable(struct clk_hw *hw)
+{
+ struct pic32_ref_osc *refo = clkhw_to_refosc(hw);
+
+ writel(REFO_ON | REFO_OE, PIC32_SET(refo->ctrl_reg));
+ return 0;
+}
+
+static void roclk_disable(struct clk_hw *hw)
+{
+ struct pic32_ref_osc *refo = clkhw_to_refosc(hw);
+
+ writel(REFO_ON | REFO_OE, PIC32_CLR(refo->ctrl_reg));
+}
+
+static int roclk_init(struct clk_hw *hw)
+{
+ /* initialize clock in disabled state */
+ roclk_disable(hw);
+
+ return 0;
+}
+
+static u8 roclk_get_parent(struct clk_hw *hw)
+{
+ struct pic32_ref_osc *refo = clkhw_to_refosc(hw);
+ u32 v, i;
+
+ v = (readl(refo->ctrl_reg) >> REFO_SEL_SHIFT) & REFO_SEL_MASK;
+
+ if (!refo->parent_map)
+ return v;
+
+ for (i = 0; i < clk_hw_get_num_parents(hw); i++)
+ if (refo->parent_map[i] == v)
+ return i;
+
+ return -EINVAL;
+}
+
+static unsigned long roclk_calc_rate(unsigned long parent_rate,
+ u32 rodiv, u32 rotrim)
+{
+ u64 rate64;
+
+ /* fout = fin / [2 * {div + (trim / 512)}]
+ * = fin * 512 / [1024 * div + 2 * trim]
+ * = fin * 256 / (512 * div + trim)
+ * = (fin << 8) / ((div << 9) + trim)
+ */
+ if (rotrim) {
+ rodiv = (rodiv << 9) + rotrim;
+ rate64 = parent_rate;
+ rate64 <<= 8;
+ do_div(rate64, rodiv);
+ } else if (rodiv) {
+ rate64 = parent_rate / (rodiv << 1);
+ } else {
+ rate64 = parent_rate;
+ }
+ return rate64;
+}
+
+static void roclk_calc_div_trim(unsigned long rate,
+ unsigned long parent_rate,
+ u32 *rodiv_p, u32 *rotrim_p)
+{
+ u32 div, rotrim, rodiv;
+ u64 frac;
+
+ /* Find integer approximation of floating-point arithmetic.
+ * fout = fin / [2 * {rodiv + (rotrim / 512)}] ... (1)
+ * i.e. fout = fin / 2 * DIV
+ * whereas DIV = rodiv + (rotrim / 512)
+ *
+ * Since kernel does not perform floating-point arithmatic so
+ * (rotrim/512) will be zero. And DIV & rodiv will result same.
+ *
+ * ie. fout = (fin * 256) / [(512 * rodiv) + rotrim] ... from (1)
+ * ie. rotrim = ((fin * 256) / fout) - (512 * DIV)
+ */
+ if (parent_rate <= rate) {
+ div = 0;
+ frac = 0;
+ rodiv = 0;
+ rotrim = 0;
+ } else {
+ div = parent_rate / (rate << 1);
+ frac = parent_rate;
+ frac <<= 8;
+ do_div(frac, rate);
+ frac -= (u64)(div << 9);
+
+ rodiv = (div > REFO_DIV_MASK) ? REFO_DIV_MASK : div;
+ rotrim = (frac >= REFO_TRIM_MAX) ? REFO_TRIM_MAX : frac;
+ }
+
+ if (rodiv_p)
+ *rodiv_p = rodiv;
+
+ if (rotrim_p)
+ *rotrim_p = rotrim;
+}
+
+static unsigned long roclk_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct pic32_ref_osc *refo = clkhw_to_refosc(hw);
+ u32 v, rodiv, rotrim;
+
+ /* get rodiv */
+ v = readl(refo->ctrl_reg);
+ rodiv = (v >> REFO_DIV_SHIFT) & REFO_DIV_MASK;
+
+ /* get trim */
+ v = readl(refo->ctrl_reg + REFO_TRIM_REG);
+ rotrim = (v >> REFO_TRIM_SHIFT) & REFO_TRIM_MASK;
+
+ return roclk_calc_rate(parent_rate, rodiv, rotrim);
+}
+
+static long roclk_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *parent_rate)
+{
+ u32 rotrim, rodiv;
+
+ /* calculate dividers for new rate */
+ roclk_calc_div_trim(rate, *parent_rate, &rodiv, &rotrim);
+
+ /* caclulate new rate (rounding) based on new rodiv & rotrim */
+ return roclk_calc_rate(*parent_rate, rodiv, rotrim);
+}
+
+static int roclk_determine_rate(struct clk_hw *hw,
+ struct clk_rate_request *req)
+{
+ struct clk_hw *parent_clk, *best_parent_clk = NULL;
+ unsigned int i, delta, best_delta = -1;
+ unsigned long parent_rate, best_parent_rate = 0;
+ unsigned long best = 0, nearest_rate;
+
+ /* find a parent which can generate nearest clkrate >= rate */
+ for (i = 0; i < clk_hw_get_num_parents(hw); i++) {
+ /* get parent */
+ parent_clk = clk_hw_get_parent_by_index(hw, i);
+ if (!parent_clk)
+ continue;
+
+ /* skip if parent runs slower than target rate */
+ parent_rate = clk_hw_get_rate(parent_clk);
+ if (req->rate > parent_rate)
+ continue;
+
+ nearest_rate = roclk_round_rate(hw, req->rate, &parent_rate);
+ delta = abs(nearest_rate - req->rate);
+ if ((nearest_rate >= req->rate) && (delta < best_delta)) {
+ best_parent_clk = parent_clk;
+ best_parent_rate = parent_rate;
+ best = nearest_rate;
+ best_delta = delta;
+
+ if (delta == 0)
+ break;
+ }
+ }
+
+ /* if no match found, retain old rate */
+ if (!best_parent_clk) {
+ pr_err("%s:%s, no parent found for rate %lu.\n",
+ __func__, clk_hw_get_name(hw), req->rate);
+ return clk_hw_get_rate(hw);
+ }
+
+ pr_debug("%s,rate %lu, best_parent(%s, %lu), best %lu, delta %d\n",
+ clk_hw_get_name(hw), req->rate,
+ clk_hw_get_name(best_parent_clk), best_parent_rate,
+ best, best_delta);
+
+ if (req->best_parent_rate)
+ req->best_parent_rate = best_parent_rate;
+
+ if (req->best_parent_hw)
+ req->best_parent_hw = best_parent_clk;
+
+ return best;
+}
+
+static int roclk_set_parent(struct clk_hw *hw, u8 index)
+{
+ struct pic32_ref_osc *refo = clkhw_to_refosc(hw);
+ unsigned long flags;
+ u32 v;
+ int err;
+
+ if (refo->parent_map)
+ index = refo->parent_map[index];
+
+ /* wait until ACTIVE bit is zero or timeout */
+ err = readl_poll_timeout(refo->ctrl_reg, v, !(v & REFO_ACTIVE),
+ 1, LOCK_TIMEOUT_US);
+ if (err) {
+ pr_err("%s: poll failed, clk active\n", clk_hw_get_name(hw));
+ return err;
+ }
+
+ spin_lock_irqsave(&refo->core->reg_lock, flags);
+
+ pic32_syskey_unlock();
+
+ /* calculate & apply new */
+ v = readl(refo->ctrl_reg);
+ v &= ~(REFO_SEL_MASK << REFO_SEL_SHIFT);
+ v |= index << REFO_SEL_SHIFT;
+
+ writel(v, refo->ctrl_reg);
+
+ spin_unlock_irqrestore(&refo->core->reg_lock, flags);
+
+ return 0;
+}
+
+static int roclk_set_rate_and_parent(struct clk_hw *hw,
+ unsigned long rate,
+ unsigned long parent_rate,
+ u8 index)
+{
+ struct pic32_ref_osc *refo = clkhw_to_refosc(hw);
+ unsigned long flags;
+ u32 trim, rodiv, v;
+ int err;
+
+ /* calculate new rodiv & rotrim for new rate */
+ roclk_calc_div_trim(rate, parent_rate, &rodiv, &trim);
+
+ pr_debug("parent_rate = %lu, rate = %lu, div = %d, trim = %d\n",
+ parent_rate, rate, rodiv, trim);
+
+ /* wait till source change is active */
+ err = readl_poll_timeout(refo->ctrl_reg, v,
+ !(v & (REFO_ACTIVE | REFO_DIVSW_EN)),
+ 1, LOCK_TIMEOUT_US);
+ if (err) {
+ pr_err("%s: poll timedout, clock is still active\n", __func__);
+ return err;
+ }
+
+ spin_lock_irqsave(&refo->core->reg_lock, flags);
+ v = readl(refo->ctrl_reg);
+
+ pic32_syskey_unlock();
+
+ /* apply parent, if required */
+ if (refo->parent_map)
+ index = refo->parent_map[index];
+
+ v &= ~(REFO_SEL_MASK << REFO_SEL_SHIFT);
+ v |= index << REFO_SEL_SHIFT;
+
+ /* apply RODIV */
+ v &= ~(REFO_DIV_MASK << REFO_DIV_SHIFT);
+ v |= rodiv << REFO_DIV_SHIFT;
+ writel(v, refo->ctrl_reg);
+
+ /* apply ROTRIM */
+ v = readl(refo->ctrl_reg + REFO_TRIM_REG);
+ v &= ~(REFO_TRIM_MASK << REFO_TRIM_SHIFT);
+ v |= trim << REFO_TRIM_SHIFT;
+ writel(v, refo->ctrl_reg + REFO_TRIM_REG);
+
+ /* enable & activate divider switching */
+ writel(REFO_ON | REFO_DIVSW_EN, PIC32_SET(refo->ctrl_reg));
+
+ /* wait till divswen is in-progress */
+ err = readl_poll_timeout_atomic(refo->ctrl_reg, v, !(v & REFO_DIVSW_EN),
+ 1, LOCK_TIMEOUT_US);
+ /* leave the clk gated as it was */
+ writel(REFO_ON, PIC32_CLR(refo->ctrl_reg));
+
+ spin_unlock_irqrestore(&refo->core->reg_lock, flags);
+
+ return err;
+}
+
+static int roclk_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ u8 index = roclk_get_parent(hw);
+
+ return roclk_set_rate_and_parent(hw, rate, parent_rate, index);
+}
+
+const struct clk_ops pic32_roclk_ops = {
+ .enable = roclk_enable,
+ .disable = roclk_disable,
+ .is_enabled = roclk_is_enabled,
+ .get_parent = roclk_get_parent,
+ .set_parent = roclk_set_parent,
+ .determine_rate = roclk_determine_rate,
+ .recalc_rate = roclk_recalc_rate,
+ .set_rate_and_parent = roclk_set_rate_and_parent,
+ .set_rate = roclk_set_rate,
+ .init = roclk_init,
+};
+
+struct clk *pic32_refo_clk_register(const struct pic32_ref_osc_data *data,
+ struct pic32_clk_common *core)
+{
+ struct pic32_ref_osc *refo;
+ struct clk *clk;
+
+ refo = devm_kzalloc(core->dev, sizeof(*refo), GFP_KERNEL);
+ if (!refo)
+ return ERR_PTR(-ENOMEM);
+
+ refo->core = core;
+ refo->hw.init = &data->init_data;
+ refo->ctrl_reg = data->ctrl_reg + core->iobase;
+ refo->parent_map = data->parent_map;
+
+ clk = devm_clk_register(core->dev, &refo->hw);
+ if (IS_ERR(clk))
+ dev_err(core->dev, "%s: clk_register() failed\n", __func__);
+
+ return clk;
+}
+
+struct pic32_sys_pll {
+ struct clk_hw hw;
+ void __iomem *ctrl_reg;
+ void __iomem *status_reg;
+ u32 lock_mask;
+ u32 idiv; /* PLL iclk divider, treated fixed */
+ struct pic32_clk_common *core;
+};
+
+#define clkhw_to_spll(_hw) container_of(_hw, struct pic32_sys_pll, hw)
+
+static inline u32 spll_odiv_to_divider(u32 odiv)
+{
+ odiv = clamp_val(odiv, PLL_ODIV_MIN, PLL_ODIV_MAX);
+
+ return 1 << odiv;
+}
+
+static unsigned long spll_calc_mult_div(struct pic32_sys_pll *pll,
+ unsigned long rate,
+ unsigned long parent_rate,
+ u32 *mult_p, u32 *odiv_p)
+{
+ u32 mul, div, best_mul = 1, best_div = 1;
+ unsigned long new_rate, best_rate = rate;
+ unsigned int best_delta = -1, delta, match_found = 0;
+ u64 rate64;
+
+ parent_rate /= pll->idiv;
+
+ for (mul = 1; mul <= PLL_MULT_MAX; mul++) {
+ for (div = PLL_ODIV_MIN; div <= PLL_ODIV_MAX; div++) {
+ rate64 = parent_rate;
+ rate64 *= mul;
+ do_div(rate64, 1 << div);
+ new_rate = rate64;
+ delta = abs(rate - new_rate);
+ if ((new_rate >= rate) && (delta < best_delta)) {
+ best_delta = delta;
+ best_rate = new_rate;
+ best_mul = mul;
+ best_div = div;
+ match_found = 1;
+ }
+ }
+ }
+
+ if (!match_found) {
+ pr_warn("spll: no match found\n");
+ return 0;
+ }
+
+ pr_debug("rate %lu, par_rate %lu/mult %u, div %u, best_rate %lu\n",
+ rate, parent_rate, best_mul, best_div, best_rate);
+
+ if (mult_p)
+ *mult_p = best_mul - 1;
+
+ if (odiv_p)
+ *odiv_p = best_div;
+
+ return best_rate;
+}
+
+static unsigned long spll_clk_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct pic32_sys_pll *pll = clkhw_to_spll(hw);
+ unsigned long pll_in_rate;
+ u32 mult, odiv, div, v;
+ u64 rate64;
+
+ v = readl(pll->ctrl_reg);
+ odiv = ((v >> PLL_ODIV_SHIFT) & PLL_ODIV_MASK);
+ mult = ((v >> PLL_MULT_SHIFT) & PLL_MULT_MASK) + 1;
+ div = spll_odiv_to_divider(odiv);
+
+ /* pll_in_rate = parent_rate / idiv
+ * pll_out_rate = pll_in_rate * mult / div;
+ */
+ pll_in_rate = parent_rate / pll->idiv;
+ rate64 = pll_in_rate;
+ rate64 *= mult;
+ do_div(rate64, div);
+
+ return rate64;
+}
+
+static long spll_clk_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *parent_rate)
+{
+ struct pic32_sys_pll *pll = clkhw_to_spll(hw);
+
+ return spll_calc_mult_div(pll, rate, *parent_rate, NULL, NULL);
+}
+
+static int spll_clk_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct pic32_sys_pll *pll = clkhw_to_spll(hw);
+ unsigned long ret, flags;
+ u32 mult, odiv, v;
+ int err;
+
+ ret = spll_calc_mult_div(pll, rate, parent_rate, &mult, &odiv);
+ if (!ret)
+ return -EINVAL;
+
+ /*
+ * We can't change SPLL counters when it is in-active use
+ * by SYSCLK. So check before applying new counters/rate.
+ */
+
+ /* Is spll_clk active parent of sys_clk ? */
+ if (unlikely(clk_hw_get_parent(pic32_sclk_hw) == hw)) {
+ pr_err("%s: failed, clk in-use\n", __func__);
+ return -EBUSY;
+ }
+
+ spin_lock_irqsave(&pll->core->reg_lock, flags);
+
+ /* apply new multiplier & divisor */
+ v = readl(pll->ctrl_reg);
+ v &= ~(PLL_MULT_MASK << PLL_MULT_SHIFT);
+ v &= ~(PLL_ODIV_MASK << PLL_ODIV_SHIFT);
+ v |= (mult << PLL_MULT_SHIFT) | (odiv << PLL_ODIV_SHIFT);
+
+ /* sys unlock before write */
+ pic32_syskey_unlock();
+
+ writel(v, pll->ctrl_reg);
+ cpu_relax();
+
+ /* insert few nops (5-stage) to ensure CPU does not hang */
+ cpu_nop5();
+ cpu_nop5();
+
+ /* Wait until PLL is locked (maximum 100 usecs). */
+ err = readl_poll_timeout_atomic(pll->status_reg, v,
+ v & pll->lock_mask, 1, 100);
+ spin_unlock_irqrestore(&pll->core->reg_lock, flags);
+
+ return err;
+}
+
+/* SPLL clock operation */
+const struct clk_ops pic32_spll_ops = {
+ .recalc_rate = spll_clk_recalc_rate,
+ .round_rate = spll_clk_round_rate,
+ .set_rate = spll_clk_set_rate,
+};
+
+struct clk *pic32_spll_clk_register(const struct pic32_sys_pll_data *data,
+ struct pic32_clk_common *core)
+{
+ struct pic32_sys_pll *spll;
+ struct clk *clk;
+
+ spll = devm_kzalloc(core->dev, sizeof(*spll), GFP_KERNEL);
+ if (!spll)
+ return ERR_PTR(-ENOMEM);
+
+ spll->core = core;
+ spll->hw.init = &data->init_data;
+ spll->ctrl_reg = data->ctrl_reg + core->iobase;
+ spll->status_reg = data->status_reg + core->iobase;
+ spll->lock_mask = data->lock_mask;
+
+ /* cache PLL idiv; PLL driver uses it as constant.*/
+ spll->idiv = (readl(spll->ctrl_reg) >> PLL_IDIV_SHIFT) & PLL_IDIV_MASK;
+ spll->idiv += 1;
+
+ clk = devm_clk_register(core->dev, &spll->hw);
+ if (IS_ERR(clk))
+ dev_err(core->dev, "sys_pll: clk_register() failed\n");
+
+ return clk;
+}
+
+/* System mux clock(aka SCLK) */
+
+struct pic32_sys_clk {
+ struct clk_hw hw;
+ void __iomem *mux_reg;
+ void __iomem *slew_reg;
+ u32 slew_div;
+ const u32 *parent_map;
+ struct pic32_clk_common *core;
+};
+
+#define clkhw_to_sys_clk(_hw) container_of(_hw, struct pic32_sys_clk, hw)
+
+static unsigned long sclk_get_rate(struct clk_hw *hw, unsigned long parent_rate)
+{
+ struct pic32_sys_clk *sclk = clkhw_to_sys_clk(hw);
+ u32 div;
+
+ div = (readl(sclk->slew_reg) >> SLEW_SYSDIV_SHIFT) & SLEW_SYSDIV;
+ div += 1; /* sys-div to divider */
+
+ return parent_rate / div;
+}
+
+static long sclk_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *parent_rate)
+{
+ return calc_best_divided_rate(rate, *parent_rate, SLEW_SYSDIV, 1);
+}
+
+static int sclk_set_rate(struct clk_hw *hw,
+ unsigned long rate, unsigned long parent_rate)
+{
+ struct pic32_sys_clk *sclk = clkhw_to_sys_clk(hw);
+ unsigned long flags;
+ u32 v, div;
+ int err;
+
+ div = parent_rate / rate;
+
+ spin_lock_irqsave(&sclk->core->reg_lock, flags);
+
+ /* apply new div */
+ v = readl(sclk->slew_reg);
+ v &= ~(SLEW_SYSDIV << SLEW_SYSDIV_SHIFT);
+ v |= (div - 1) << SLEW_SYSDIV_SHIFT;
+
+ pic32_syskey_unlock();
+
+ writel(v, sclk->slew_reg);
+
+ /* wait until BUSY is cleared */
+ err = readl_poll_timeout_atomic(sclk->slew_reg, v,
+ !(v & SLEW_BUSY), 1, LOCK_TIMEOUT_US);
+
+ spin_unlock_irqrestore(&sclk->core->reg_lock, flags);
+
+ return err;
+}
+
+static u8 sclk_get_parent(struct clk_hw *hw)
+{
+ struct pic32_sys_clk *sclk = clkhw_to_sys_clk(hw);
+ u32 i, v;
+
+ v = (readl(sclk->mux_reg) >> OSC_CUR_SHIFT) & OSC_CUR_MASK;
+
+ if (!sclk->parent_map)
+ return v;
+
+ for (i = 0; i < clk_hw_get_num_parents(hw); i++)
+ if (sclk->parent_map[i] == v)
+ return i;
+ return -EINVAL;
+}
+
+static int sclk_set_parent(struct clk_hw *hw, u8 index)
+{
+ struct pic32_sys_clk *sclk = clkhw_to_sys_clk(hw);
+ unsigned long flags;
+ u32 nosc, cosc, v;
+ int err;
+
+ spin_lock_irqsave(&sclk->core->reg_lock, flags);
+
+ /* find new_osc */
+ nosc = sclk->parent_map ? sclk->parent_map[index] : index;
+
+ /* set new parent */
+ v = readl(sclk->mux_reg);
+ v &= ~(OSC_NEW_MASK << OSC_NEW_SHIFT);
+ v |= nosc << OSC_NEW_SHIFT;
+
+ pic32_syskey_unlock();
+
+ writel(v, sclk->mux_reg);
+
+ /* initate switch */
+ writel(OSC_SWEN, PIC32_SET(sclk->mux_reg));
+ cpu_relax();
+
+ /* add nop to flush pipeline (as cpu_clk is in-flux) */
+ cpu_nop5();
+
+ /* wait for SWEN bit to clear */
+ err = readl_poll_timeout_atomic(sclk->slew_reg, v,
+ !(v & OSC_SWEN), 1, LOCK_TIMEOUT_US);
+
+ spin_unlock_irqrestore(&sclk->core->reg_lock, flags);
+
+ /*
+ * SCLK clock-switching logic might reject a clock switching request
+ * if pre-requisites (like new clk_src not present or unstable) are
+ * not met.
+ * So confirm before claiming success.
+ */
+ cosc = (readl(sclk->mux_reg) >> OSC_CUR_SHIFT) & OSC_CUR_MASK;
+ if (cosc != nosc) {
+ pr_err("%s: err, failed to set_parent() to %d, current %d\n",
+ clk_hw_get_name(hw), nosc, cosc);
+ err = -EBUSY;
+ }
+
+ return err;
+}
+
+static int sclk_init(struct clk_hw *hw)
+{
+ struct pic32_sys_clk *sclk = clkhw_to_sys_clk(hw);
+ unsigned long flags;
+ u32 v;
+
+ /* Maintain reference to this clk, required in spll_clk_set_rate() */
+ pic32_sclk_hw = hw;
+
+ /* apply slew divider on both up and down scaling */
+ if (sclk->slew_div) {
+ spin_lock_irqsave(&sclk->core->reg_lock, flags);
+ v = readl(sclk->slew_reg);
+ v &= ~(SLEW_DIV << SLEW_DIV_SHIFT);
+ v |= sclk->slew_div << SLEW_DIV_SHIFT;
+ v |= SLEW_DOWNEN | SLEW_UPEN;
+ writel(v, sclk->slew_reg);
+ spin_unlock_irqrestore(&sclk->core->reg_lock, flags);
+ }
+
+ return 0;
+}
+
+/* sclk with post-divider */
+const struct clk_ops pic32_sclk_ops = {
+ .get_parent = sclk_get_parent,
+ .set_parent = sclk_set_parent,
+ .round_rate = sclk_round_rate,
+ .set_rate = sclk_set_rate,
+ .recalc_rate = sclk_get_rate,
+ .init = sclk_init,
+ .determine_rate = __clk_mux_determine_rate,
+};
+
+/* sclk with no slew and no post-divider */
+const struct clk_ops pic32_sclk_no_div_ops = {
+ .get_parent = sclk_get_parent,
+ .set_parent = sclk_set_parent,
+ .init = sclk_init,
+ .determine_rate = __clk_mux_determine_rate,
+};
+
+struct clk *pic32_sys_clk_register(const struct pic32_sys_clk_data *data,
+ struct pic32_clk_common *core)
+{
+ struct pic32_sys_clk *sclk;
+ struct clk *clk;
+
+ sclk = devm_kzalloc(core->dev, sizeof(*sclk), GFP_KERNEL);
+ if (!sclk)
+ return ERR_PTR(-ENOMEM);
+
+ sclk->core = core;
+ sclk->hw.init = &data->init_data;
+ sclk->mux_reg = data->mux_reg + core->iobase;
+ sclk->slew_reg = data->slew_reg + core->iobase;
+ sclk->slew_div = data->slew_div;
+ sclk->parent_map = data->parent_map;
+
+ clk = devm_clk_register(core->dev, &sclk->hw);
+ if (IS_ERR(clk))
+ dev_err(core->dev, "%s: clk register failed\n", __func__);
+
+ return clk;
+}
+
+/* secondary oscillator */
+struct pic32_sec_osc {
+ struct clk_hw hw;
+ void __iomem *enable_reg;
+ void __iomem *status_reg;
+ u32 enable_mask;
+ u32 status_mask;
+ unsigned long fixed_rate;
+ struct pic32_clk_common *core;
+};
+
+#define clkhw_to_sosc(_hw) container_of(_hw, struct pic32_sec_osc, hw)
+static int sosc_clk_enable(struct clk_hw *hw)
+{
+ struct pic32_sec_osc *sosc = clkhw_to_sosc(hw);
+ u32 v;
+
+ /* enable SOSC */
+ pic32_syskey_unlock();
+ writel(sosc->enable_mask, PIC32_SET(sosc->enable_reg));
+
+ /* wait till warm-up period expires or ready-status is updated */
+ return readl_poll_timeout_atomic(sosc->status_reg, v,
+ v & sosc->status_mask, 1, 100);
+}
+
+static void sosc_clk_disable(struct clk_hw *hw)
+{
+ struct pic32_sec_osc *sosc = clkhw_to_sosc(hw);
+
+ pic32_syskey_unlock();
+ writel(sosc->enable_mask, PIC32_CLR(sosc->enable_reg));
+}
+
+static int sosc_clk_is_enabled(struct clk_hw *hw)
+{
+ struct pic32_sec_osc *sosc = clkhw_to_sosc(hw);
+ u32 enabled, ready;
+
+ /* check enabled and ready status */
+ enabled = readl(sosc->enable_reg) & sosc->enable_mask;
+ ready = readl(sosc->status_reg) & sosc->status_mask;
+
+ return enabled && ready;
+}
+
+static unsigned long sosc_clk_calc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ return clkhw_to_sosc(hw)->fixed_rate;
+}
+
+const struct clk_ops pic32_sosc_ops = {
+ .enable = sosc_clk_enable,
+ .disable = sosc_clk_disable,
+ .is_enabled = sosc_clk_is_enabled,
+ .recalc_rate = sosc_clk_calc_rate,
+};
+
+struct clk *pic32_sosc_clk_register(const struct pic32_sec_osc_data *data,
+ struct pic32_clk_common *core)
+{
+ struct pic32_sec_osc *sosc;
+
+ sosc = devm_kzalloc(core->dev, sizeof(*sosc), GFP_KERNEL);
+ if (!sosc)
+ return ERR_PTR(-ENOMEM);
+
+ sosc->core = core;
+ sosc->hw.init = &data->init_data;
+ sosc->fixed_rate = data->fixed_rate;
+ sosc->enable_mask = data->enable_mask;
+ sosc->status_mask = data->status_mask;
+ sosc->enable_reg = data->enable_reg + core->iobase;
+ sosc->status_reg = data->status_reg + core->iobase;
+
+ return devm_clk_register(core->dev, &sosc->hw);
+}
diff --git a/drivers/clk/microchip/clk-core.h b/drivers/clk/microchip/clk-core.h
new file mode 100644
index 000000000..acb81739a
--- /dev/null
+++ b/drivers/clk/microchip/clk-core.h
@@ -0,0 +1,76 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Purna Chandra Mandal,<purna.mandal@microchip.com>
+ * Copyright (C) 2015 Microchip Technology Inc. All rights reserved.
+ */
+#ifndef __MICROCHIP_CLK_PIC32_H_
+#define __MICROCHIP_CLK_PIC32_H_
+
+#include <linux/clk-provider.h>
+
+/* PIC32 clock data */
+struct pic32_clk_common {
+ struct device *dev;
+ void __iomem *iobase;
+ spinlock_t reg_lock; /* clock lock */
+};
+
+/* System PLL clock */
+struct pic32_sys_pll_data {
+ struct clk_init_data init_data;
+ const u32 ctrl_reg;
+ const u32 status_reg;
+ const u32 lock_mask;
+};
+
+/* System clock */
+struct pic32_sys_clk_data {
+ struct clk_init_data init_data;
+ const u32 mux_reg;
+ const u32 slew_reg;
+ const u32 *parent_map;
+ const u32 slew_div;
+};
+
+/* Reference Oscillator clock */
+struct pic32_ref_osc_data {
+ struct clk_init_data init_data;
+ const u32 ctrl_reg;
+ const u32 *parent_map;
+};
+
+/* Peripheral Bus clock */
+struct pic32_periph_clk_data {
+ struct clk_init_data init_data;
+ const u32 ctrl_reg;
+};
+
+/* External Secondary Oscillator clock */
+struct pic32_sec_osc_data {
+ struct clk_init_data init_data;
+ const u32 enable_reg;
+ const u32 status_reg;
+ const u32 enable_mask;
+ const u32 status_mask;
+ const unsigned long fixed_rate;
+};
+
+extern const struct clk_ops pic32_pbclk_ops;
+extern const struct clk_ops pic32_sclk_ops;
+extern const struct clk_ops pic32_sclk_no_div_ops;
+extern const struct clk_ops pic32_spll_ops;
+extern const struct clk_ops pic32_roclk_ops;
+extern const struct clk_ops pic32_sosc_ops;
+
+struct clk *pic32_periph_clk_register(const struct pic32_periph_clk_data *data,
+ struct pic32_clk_common *core);
+struct clk *pic32_refo_clk_register(const struct pic32_ref_osc_data *data,
+ struct pic32_clk_common *core);
+struct clk *pic32_sys_clk_register(const struct pic32_sys_clk_data *data,
+ struct pic32_clk_common *core);
+struct clk *pic32_spll_clk_register(const struct pic32_sys_pll_data *data,
+ struct pic32_clk_common *core);
+struct clk *pic32_sosc_clk_register(const struct pic32_sec_osc_data *data,
+ struct pic32_clk_common *core);
+
+#endif /* __MICROCHIP_CLK_PIC32_H_*/
diff --git a/drivers/clk/microchip/clk-mpfs-ccc.c b/drivers/clk/microchip/clk-mpfs-ccc.c
new file mode 100644
index 000000000..0ddc73e07
--- /dev/null
+++ b/drivers/clk/microchip/clk-mpfs-ccc.c
@@ -0,0 +1,294 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Author: Conor Dooley <conor.dooley@microchip.com>
+ *
+ * Copyright (C) 2022 Microchip Technology Inc. and its subsidiaries
+ */
+#include "asm-generic/errno-base.h"
+#include <linux/clk-provider.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <dt-bindings/clock/microchip,mpfs-clock.h>
+
+/* address offset of control registers */
+#define MPFS_CCC_PLL_CR 0x04u
+#define MPFS_CCC_REF_CR 0x08u
+#define MPFS_CCC_SSCG_2_CR 0x2Cu
+#define MPFS_CCC_POSTDIV01_CR 0x10u
+#define MPFS_CCC_POSTDIV23_CR 0x14u
+
+#define MPFS_CCC_FBDIV_SHIFT 0x00u
+#define MPFS_CCC_FBDIV_WIDTH 0x0Cu
+#define MPFS_CCC_POSTDIV0_SHIFT 0x08u
+#define MPFS_CCC_POSTDIV1_SHIFT 0x18u
+#define MPFS_CCC_POSTDIV2_SHIFT MPFS_CCC_POSTDIV0_SHIFT
+#define MPFS_CCC_POSTDIV3_SHIFT MPFS_CCC_POSTDIV1_SHIFT
+#define MPFS_CCC_POSTDIV_WIDTH 0x06u
+#define MPFS_CCC_REFCLK_SEL BIT(6)
+#define MPFS_CCC_REFDIV_SHIFT 0x08u
+#define MPFS_CCC_REFDIV_WIDTH 0x06u
+
+#define MPFS_CCC_FIXED_DIV 4
+#define MPFS_CCC_OUTPUTS_PER_PLL 4
+#define MPFS_CCC_REFS_PER_PLL 2
+
+struct mpfs_ccc_data {
+ void __iomem **pll_base;
+ struct device *dev;
+ struct clk_hw_onecell_data hw_data;
+};
+
+struct mpfs_ccc_pll_hw_clock {
+ void __iomem *base;
+ const char *name;
+ const struct clk_parent_data *parents;
+ unsigned int id;
+ u32 reg_offset;
+ u32 shift;
+ u32 width;
+ u32 flags;
+ struct clk_hw hw;
+ struct clk_init_data init;
+};
+
+#define to_mpfs_ccc_clk(_hw) container_of(_hw, struct mpfs_ccc_pll_hw_clock, hw)
+
+/*
+ * mpfs_ccc_lock prevents anything else from writing to a fabric ccc
+ * while a software locked register is being written.
+ */
+static DEFINE_SPINLOCK(mpfs_ccc_lock);
+
+static const struct clk_parent_data mpfs_ccc_pll0_refs[] = {
+ { .fw_name = "pll0_ref0" },
+ { .fw_name = "pll0_ref1" },
+};
+
+static const struct clk_parent_data mpfs_ccc_pll1_refs[] = {
+ { .fw_name = "pll1_ref0" },
+ { .fw_name = "pll1_ref1" },
+};
+
+static unsigned long mpfs_ccc_pll_recalc_rate(struct clk_hw *hw, unsigned long prate)
+{
+ struct mpfs_ccc_pll_hw_clock *ccc_hw = to_mpfs_ccc_clk(hw);
+ void __iomem *mult_addr = ccc_hw->base + ccc_hw->reg_offset;
+ void __iomem *ref_div_addr = ccc_hw->base + MPFS_CCC_REF_CR;
+ u32 mult, ref_div;
+
+ mult = readl_relaxed(mult_addr) >> MPFS_CCC_FBDIV_SHIFT;
+ mult &= clk_div_mask(MPFS_CCC_FBDIV_WIDTH);
+ ref_div = readl_relaxed(ref_div_addr) >> MPFS_CCC_REFDIV_SHIFT;
+ ref_div &= clk_div_mask(MPFS_CCC_REFDIV_WIDTH);
+
+ return prate * mult / (ref_div * MPFS_CCC_FIXED_DIV);
+}
+
+static u8 mpfs_ccc_pll_get_parent(struct clk_hw *hw)
+{
+ struct mpfs_ccc_pll_hw_clock *ccc_hw = to_mpfs_ccc_clk(hw);
+ void __iomem *pll_cr_addr = ccc_hw->base + MPFS_CCC_PLL_CR;
+
+ return !!(readl_relaxed(pll_cr_addr) & MPFS_CCC_REFCLK_SEL);
+}
+
+static const struct clk_ops mpfs_ccc_pll_ops = {
+ .recalc_rate = mpfs_ccc_pll_recalc_rate,
+ .get_parent = mpfs_ccc_pll_get_parent,
+};
+
+#define CLK_CCC_PLL(_id, _parents, _shift, _width, _flags, _offset) { \
+ .id = _id, \
+ .shift = _shift, \
+ .width = _width, \
+ .reg_offset = _offset, \
+ .flags = _flags, \
+ .parents = _parents, \
+}
+
+static struct mpfs_ccc_pll_hw_clock mpfs_ccc_pll_clks[] = {
+ CLK_CCC_PLL(CLK_CCC_PLL0, mpfs_ccc_pll0_refs, MPFS_CCC_FBDIV_SHIFT,
+ MPFS_CCC_FBDIV_WIDTH, 0, MPFS_CCC_SSCG_2_CR),
+ CLK_CCC_PLL(CLK_CCC_PLL1, mpfs_ccc_pll1_refs, MPFS_CCC_FBDIV_SHIFT,
+ MPFS_CCC_FBDIV_WIDTH, 0, MPFS_CCC_SSCG_2_CR),
+};
+
+struct mpfs_ccc_out_hw_clock {
+ struct clk_divider divider;
+ struct clk_init_data init;
+ unsigned int id;
+ u32 reg_offset;
+};
+
+#define CLK_CCC_OUT(_id, _shift, _width, _flags, _offset) { \
+ .id = _id, \
+ .divider.shift = _shift, \
+ .divider.width = _width, \
+ .reg_offset = _offset, \
+ .divider.flags = _flags, \
+ .divider.lock = &mpfs_ccc_lock, \
+}
+
+static struct mpfs_ccc_out_hw_clock mpfs_ccc_pll0out_clks[] = {
+ CLK_CCC_OUT(CLK_CCC_PLL0_OUT0, MPFS_CCC_POSTDIV0_SHIFT, MPFS_CCC_POSTDIV_WIDTH,
+ CLK_DIVIDER_ONE_BASED, MPFS_CCC_POSTDIV01_CR),
+ CLK_CCC_OUT(CLK_CCC_PLL0_OUT1, MPFS_CCC_POSTDIV1_SHIFT, MPFS_CCC_POSTDIV_WIDTH,
+ CLK_DIVIDER_ONE_BASED, MPFS_CCC_POSTDIV01_CR),
+ CLK_CCC_OUT(CLK_CCC_PLL0_OUT2, MPFS_CCC_POSTDIV2_SHIFT, MPFS_CCC_POSTDIV_WIDTH,
+ CLK_DIVIDER_ONE_BASED, MPFS_CCC_POSTDIV23_CR),
+ CLK_CCC_OUT(CLK_CCC_PLL0_OUT3, MPFS_CCC_POSTDIV3_SHIFT, MPFS_CCC_POSTDIV_WIDTH,
+ CLK_DIVIDER_ONE_BASED, MPFS_CCC_POSTDIV23_CR),
+};
+
+static struct mpfs_ccc_out_hw_clock mpfs_ccc_pll1out_clks[] = {
+ CLK_CCC_OUT(CLK_CCC_PLL1_OUT0, MPFS_CCC_POSTDIV0_SHIFT, MPFS_CCC_POSTDIV_WIDTH,
+ CLK_DIVIDER_ONE_BASED, MPFS_CCC_POSTDIV01_CR),
+ CLK_CCC_OUT(CLK_CCC_PLL1_OUT1, MPFS_CCC_POSTDIV1_SHIFT, MPFS_CCC_POSTDIV_WIDTH,
+ CLK_DIVIDER_ONE_BASED, MPFS_CCC_POSTDIV01_CR),
+ CLK_CCC_OUT(CLK_CCC_PLL1_OUT2, MPFS_CCC_POSTDIV2_SHIFT, MPFS_CCC_POSTDIV_WIDTH,
+ CLK_DIVIDER_ONE_BASED, MPFS_CCC_POSTDIV23_CR),
+ CLK_CCC_OUT(CLK_CCC_PLL1_OUT3, MPFS_CCC_POSTDIV3_SHIFT, MPFS_CCC_POSTDIV_WIDTH,
+ CLK_DIVIDER_ONE_BASED, MPFS_CCC_POSTDIV23_CR),
+};
+
+static struct mpfs_ccc_out_hw_clock *mpfs_ccc_pllout_clks[] = {
+ mpfs_ccc_pll0out_clks, mpfs_ccc_pll1out_clks
+};
+
+static int mpfs_ccc_register_outputs(struct device *dev, struct mpfs_ccc_out_hw_clock *out_hws,
+ unsigned int num_clks, struct mpfs_ccc_data *data,
+ struct mpfs_ccc_pll_hw_clock *parent)
+{
+ int ret;
+
+ for (unsigned int i = 0; i < num_clks; i++) {
+ struct mpfs_ccc_out_hw_clock *out_hw = &out_hws[i];
+ char *name = devm_kasprintf(dev, GFP_KERNEL, "%s_out%u", parent->name, i);
+
+ if (!name)
+ return -ENOMEM;
+
+ out_hw->divider.hw.init = CLK_HW_INIT_HW(name, &parent->hw, &clk_divider_ops, 0);
+ out_hw->divider.reg = data->pll_base[i / MPFS_CCC_OUTPUTS_PER_PLL] +
+ out_hw->reg_offset;
+
+ ret = devm_clk_hw_register(dev, &out_hw->divider.hw);
+ if (ret)
+ return dev_err_probe(dev, ret, "failed to register clock id: %d\n",
+ out_hw->id);
+
+ data->hw_data.hws[out_hw->id] = &out_hw->divider.hw;
+ }
+
+ return 0;
+}
+
+#define CLK_HW_INIT_PARENTS_DATA_FIXED_SIZE(_name, _parents, _ops, _flags) \
+ (&(struct clk_init_data) { \
+ .flags = _flags, \
+ .name = _name, \
+ .parent_data = _parents, \
+ .num_parents = MPFS_CCC_REFS_PER_PLL, \
+ .ops = _ops, \
+ })
+
+static int mpfs_ccc_register_plls(struct device *dev, struct mpfs_ccc_pll_hw_clock *pll_hws,
+ unsigned int num_clks, struct mpfs_ccc_data *data)
+{
+ int ret;
+
+ for (unsigned int i = 0; i < num_clks; i++) {
+ struct mpfs_ccc_pll_hw_clock *pll_hw = &pll_hws[i];
+
+ pll_hw->name = devm_kasprintf(dev, GFP_KERNEL, "ccc%s_pll%u",
+ strchrnul(dev->of_node->full_name, '@'), i);
+ if (!pll_hw->name)
+ return -ENOMEM;
+
+ pll_hw->base = data->pll_base[i];
+ pll_hw->hw.init = CLK_HW_INIT_PARENTS_DATA_FIXED_SIZE(pll_hw->name,
+ pll_hw->parents,
+ &mpfs_ccc_pll_ops, 0);
+
+ ret = devm_clk_hw_register(dev, &pll_hw->hw);
+ if (ret)
+ return dev_err_probe(dev, ret, "failed to register ccc id: %d\n",
+ pll_hw->id);
+
+ data->hw_data.hws[pll_hw->id] = &pll_hw->hw;
+
+ ret = mpfs_ccc_register_outputs(dev, mpfs_ccc_pllout_clks[i],
+ MPFS_CCC_OUTPUTS_PER_PLL, data, pll_hw);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int mpfs_ccc_probe(struct platform_device *pdev)
+{
+ struct mpfs_ccc_data *clk_data;
+ void __iomem *pll_base[ARRAY_SIZE(mpfs_ccc_pll_clks)];
+ unsigned int num_clks;
+ int ret;
+
+ num_clks = ARRAY_SIZE(mpfs_ccc_pll_clks) + ARRAY_SIZE(mpfs_ccc_pll0out_clks) +
+ ARRAY_SIZE(mpfs_ccc_pll1out_clks);
+
+ clk_data = devm_kzalloc(&pdev->dev, struct_size(clk_data, hw_data.hws, num_clks),
+ GFP_KERNEL);
+ if (!clk_data)
+ return -ENOMEM;
+
+ pll_base[0] = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(pll_base[0]))
+ return PTR_ERR(pll_base[0]);
+
+ pll_base[1] = devm_platform_ioremap_resource(pdev, 1);
+ if (IS_ERR(pll_base[1]))
+ return PTR_ERR(pll_base[1]);
+
+ clk_data->pll_base = pll_base;
+ clk_data->hw_data.num = num_clks;
+ clk_data->dev = &pdev->dev;
+
+ ret = mpfs_ccc_register_plls(clk_data->dev, mpfs_ccc_pll_clks,
+ ARRAY_SIZE(mpfs_ccc_pll_clks), clk_data);
+ if (ret)
+ return ret;
+
+ return devm_of_clk_add_hw_provider(clk_data->dev, of_clk_hw_onecell_get,
+ &clk_data->hw_data);
+}
+
+static const struct of_device_id mpfs_ccc_of_match_table[] = {
+ { .compatible = "microchip,mpfs-ccc", },
+ {}
+};
+MODULE_DEVICE_TABLE(of, mpfs_ccc_of_match_table);
+
+static struct platform_driver mpfs_ccc_driver = {
+ .probe = mpfs_ccc_probe,
+ .driver = {
+ .name = "microchip-mpfs-ccc",
+ .of_match_table = mpfs_ccc_of_match_table,
+ },
+};
+
+static int __init clk_ccc_init(void)
+{
+ return platform_driver_register(&mpfs_ccc_driver);
+}
+core_initcall(clk_ccc_init);
+
+static void __exit clk_ccc_exit(void)
+{
+ platform_driver_unregister(&mpfs_ccc_driver);
+}
+module_exit(clk_ccc_exit);
+
+MODULE_DESCRIPTION("Microchip PolarFire SoC Clock Conditioning Circuitry Driver");
+MODULE_AUTHOR("Conor Dooley <conor.dooley@microchip.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/clk/microchip/clk-mpfs.c b/drivers/clk/microchip/clk-mpfs.c
new file mode 100644
index 000000000..cc5d7dee5
--- /dev/null
+++ b/drivers/clk/microchip/clk-mpfs.c
@@ -0,0 +1,515 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * PolarFire SoC MSS/core complex clock control
+ *
+ * Copyright (C) 2020-2022 Microchip Technology Inc. All rights reserved.
+ */
+#include <linux/auxiliary_bus.h>
+#include <linux/clk-provider.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <dt-bindings/clock/microchip,mpfs-clock.h>
+#include <soc/microchip/mpfs.h>
+
+/* address offset of control registers */
+#define REG_MSSPLL_REF_CR 0x08u
+#define REG_MSSPLL_POSTDIV_CR 0x10u
+#define REG_MSSPLL_SSCG_2_CR 0x2Cu
+#define REG_CLOCK_CONFIG_CR 0x08u
+#define REG_RTC_CLOCK_CR 0x0Cu
+#define REG_SUBBLK_CLOCK_CR 0x84u
+#define REG_SUBBLK_RESET_CR 0x88u
+
+#define MSSPLL_FBDIV_SHIFT 0x00u
+#define MSSPLL_FBDIV_WIDTH 0x0Cu
+#define MSSPLL_REFDIV_SHIFT 0x08u
+#define MSSPLL_REFDIV_WIDTH 0x06u
+#define MSSPLL_POSTDIV_SHIFT 0x08u
+#define MSSPLL_POSTDIV_WIDTH 0x07u
+#define MSSPLL_FIXED_DIV 4u
+
+struct mpfs_clock_data {
+ struct device *dev;
+ void __iomem *base;
+ void __iomem *msspll_base;
+ struct clk_hw_onecell_data hw_data;
+};
+
+struct mpfs_msspll_hw_clock {
+ void __iomem *base;
+ unsigned int id;
+ u32 reg_offset;
+ u32 shift;
+ u32 width;
+ u32 flags;
+ struct clk_hw hw;
+ struct clk_init_data init;
+};
+
+#define to_mpfs_msspll_clk(_hw) container_of(_hw, struct mpfs_msspll_hw_clock, hw)
+
+struct mpfs_cfg_hw_clock {
+ struct clk_divider cfg;
+ struct clk_init_data init;
+ unsigned int id;
+ u32 reg_offset;
+};
+
+struct mpfs_periph_hw_clock {
+ struct clk_gate periph;
+ unsigned int id;
+};
+
+/*
+ * mpfs_clk_lock prevents anything else from writing to the
+ * mpfs clk block while a software locked register is being written.
+ */
+static DEFINE_SPINLOCK(mpfs_clk_lock);
+
+static const struct clk_parent_data mpfs_ext_ref[] = {
+ { .index = 0 },
+};
+
+static const struct clk_div_table mpfs_div_cpu_axi_table[] = {
+ { 0, 1 }, { 1, 2 }, { 2, 4 }, { 3, 8 },
+ { 0, 0 }
+};
+
+static const struct clk_div_table mpfs_div_ahb_table[] = {
+ { 1, 2 }, { 2, 4}, { 3, 8 },
+ { 0, 0 }
+};
+
+/*
+ * The only two supported reference clock frequencies for the PolarFire SoC are
+ * 100 and 125 MHz, as the rtc reference is required to be 1 MHz.
+ * It therefore only needs to have divider table entries corresponding to
+ * divide by 100 and 125.
+ */
+static const struct clk_div_table mpfs_div_rtcref_table[] = {
+ { 100, 100 }, { 125, 125 },
+ { 0, 0 }
+};
+
+static unsigned long mpfs_clk_msspll_recalc_rate(struct clk_hw *hw, unsigned long prate)
+{
+ struct mpfs_msspll_hw_clock *msspll_hw = to_mpfs_msspll_clk(hw);
+ void __iomem *mult_addr = msspll_hw->base + msspll_hw->reg_offset;
+ void __iomem *ref_div_addr = msspll_hw->base + REG_MSSPLL_REF_CR;
+ void __iomem *postdiv_addr = msspll_hw->base + REG_MSSPLL_POSTDIV_CR;
+ u32 mult, ref_div, postdiv;
+
+ mult = readl_relaxed(mult_addr) >> MSSPLL_FBDIV_SHIFT;
+ mult &= clk_div_mask(MSSPLL_FBDIV_WIDTH);
+ ref_div = readl_relaxed(ref_div_addr) >> MSSPLL_REFDIV_SHIFT;
+ ref_div &= clk_div_mask(MSSPLL_REFDIV_WIDTH);
+ postdiv = readl_relaxed(postdiv_addr) >> MSSPLL_POSTDIV_SHIFT;
+ postdiv &= clk_div_mask(MSSPLL_POSTDIV_WIDTH);
+
+ return prate * mult / (ref_div * MSSPLL_FIXED_DIV * postdiv);
+}
+
+static long mpfs_clk_msspll_round_rate(struct clk_hw *hw, unsigned long rate, unsigned long *prate)
+{
+ struct mpfs_msspll_hw_clock *msspll_hw = to_mpfs_msspll_clk(hw);
+ void __iomem *mult_addr = msspll_hw->base + msspll_hw->reg_offset;
+ void __iomem *ref_div_addr = msspll_hw->base + REG_MSSPLL_REF_CR;
+ u32 mult, ref_div;
+ unsigned long rate_before_ctrl;
+
+ mult = readl_relaxed(mult_addr) >> MSSPLL_FBDIV_SHIFT;
+ mult &= clk_div_mask(MSSPLL_FBDIV_WIDTH);
+ ref_div = readl_relaxed(ref_div_addr) >> MSSPLL_REFDIV_SHIFT;
+ ref_div &= clk_div_mask(MSSPLL_REFDIV_WIDTH);
+
+ rate_before_ctrl = rate * (ref_div * MSSPLL_FIXED_DIV) / mult;
+
+ return divider_round_rate(hw, rate_before_ctrl, prate, NULL, MSSPLL_POSTDIV_WIDTH,
+ msspll_hw->flags);
+}
+
+static int mpfs_clk_msspll_set_rate(struct clk_hw *hw, unsigned long rate, unsigned long prate)
+{
+ struct mpfs_msspll_hw_clock *msspll_hw = to_mpfs_msspll_clk(hw);
+ void __iomem *mult_addr = msspll_hw->base + msspll_hw->reg_offset;
+ void __iomem *ref_div_addr = msspll_hw->base + REG_MSSPLL_REF_CR;
+ void __iomem *postdiv_addr = msspll_hw->base + REG_MSSPLL_POSTDIV_CR;
+ u32 mult, ref_div, postdiv;
+ int divider_setting;
+ unsigned long rate_before_ctrl, flags;
+
+ mult = readl_relaxed(mult_addr) >> MSSPLL_FBDIV_SHIFT;
+ mult &= clk_div_mask(MSSPLL_FBDIV_WIDTH);
+ ref_div = readl_relaxed(ref_div_addr) >> MSSPLL_REFDIV_SHIFT;
+ ref_div &= clk_div_mask(MSSPLL_REFDIV_WIDTH);
+
+ rate_before_ctrl = rate * (ref_div * MSSPLL_FIXED_DIV) / mult;
+ divider_setting = divider_get_val(rate_before_ctrl, prate, NULL, MSSPLL_POSTDIV_WIDTH,
+ msspll_hw->flags);
+
+ if (divider_setting < 0)
+ return divider_setting;
+
+ spin_lock_irqsave(&mpfs_clk_lock, flags);
+
+ postdiv = readl_relaxed(postdiv_addr);
+ postdiv &= ~(clk_div_mask(MSSPLL_POSTDIV_WIDTH) << MSSPLL_POSTDIV_SHIFT);
+ writel_relaxed(postdiv, postdiv_addr);
+
+ spin_unlock_irqrestore(&mpfs_clk_lock, flags);
+
+ return 0;
+}
+
+static const struct clk_ops mpfs_clk_msspll_ops = {
+ .recalc_rate = mpfs_clk_msspll_recalc_rate,
+ .round_rate = mpfs_clk_msspll_round_rate,
+ .set_rate = mpfs_clk_msspll_set_rate,
+};
+
+#define CLK_PLL(_id, _name, _parent, _shift, _width, _flags, _offset) { \
+ .id = _id, \
+ .shift = _shift, \
+ .width = _width, \
+ .reg_offset = _offset, \
+ .flags = _flags, \
+ .hw.init = CLK_HW_INIT_PARENTS_DATA(_name, _parent, &mpfs_clk_msspll_ops, 0), \
+}
+
+static struct mpfs_msspll_hw_clock mpfs_msspll_clks[] = {
+ CLK_PLL(CLK_MSSPLL, "clk_msspll", mpfs_ext_ref, MSSPLL_FBDIV_SHIFT,
+ MSSPLL_FBDIV_WIDTH, 0, REG_MSSPLL_SSCG_2_CR),
+};
+
+static int mpfs_clk_register_mssplls(struct device *dev, struct mpfs_msspll_hw_clock *msspll_hws,
+ unsigned int num_clks, struct mpfs_clock_data *data)
+{
+ unsigned int i;
+ int ret;
+
+ for (i = 0; i < num_clks; i++) {
+ struct mpfs_msspll_hw_clock *msspll_hw = &msspll_hws[i];
+
+ msspll_hw->base = data->msspll_base;
+ ret = devm_clk_hw_register(dev, &msspll_hw->hw);
+ if (ret)
+ return dev_err_probe(dev, ret, "failed to register msspll id: %d\n",
+ CLK_MSSPLL);
+
+ data->hw_data.hws[msspll_hw->id] = &msspll_hw->hw;
+ }
+
+ return 0;
+}
+
+/*
+ * "CFG" clocks
+ */
+
+#define CLK_CFG(_id, _name, _parent, _shift, _width, _table, _flags, _offset) { \
+ .id = _id, \
+ .cfg.shift = _shift, \
+ .cfg.width = _width, \
+ .cfg.table = _table, \
+ .reg_offset = _offset, \
+ .cfg.flags = _flags, \
+ .cfg.hw.init = CLK_HW_INIT(_name, _parent, &clk_divider_ops, 0), \
+ .cfg.lock = &mpfs_clk_lock, \
+}
+
+#define CLK_CPU_OFFSET 0u
+#define CLK_AXI_OFFSET 1u
+#define CLK_AHB_OFFSET 2u
+#define CLK_RTCREF_OFFSET 3u
+
+static struct mpfs_cfg_hw_clock mpfs_cfg_clks[] = {
+ CLK_CFG(CLK_CPU, "clk_cpu", "clk_msspll", 0, 2, mpfs_div_cpu_axi_table, 0,
+ REG_CLOCK_CONFIG_CR),
+ CLK_CFG(CLK_AXI, "clk_axi", "clk_msspll", 2, 2, mpfs_div_cpu_axi_table, 0,
+ REG_CLOCK_CONFIG_CR),
+ CLK_CFG(CLK_AHB, "clk_ahb", "clk_msspll", 4, 2, mpfs_div_ahb_table, 0,
+ REG_CLOCK_CONFIG_CR),
+ {
+ .id = CLK_RTCREF,
+ .cfg.shift = 0,
+ .cfg.width = 12,
+ .cfg.table = mpfs_div_rtcref_table,
+ .reg_offset = REG_RTC_CLOCK_CR,
+ .cfg.flags = CLK_DIVIDER_ONE_BASED,
+ .cfg.hw.init =
+ CLK_HW_INIT_PARENTS_DATA("clk_rtcref", mpfs_ext_ref, &clk_divider_ops, 0),
+ }
+};
+
+static int mpfs_clk_register_cfgs(struct device *dev, struct mpfs_cfg_hw_clock *cfg_hws,
+ unsigned int num_clks, struct mpfs_clock_data *data)
+{
+ unsigned int i, id;
+ int ret;
+
+ for (i = 0; i < num_clks; i++) {
+ struct mpfs_cfg_hw_clock *cfg_hw = &cfg_hws[i];
+
+ cfg_hw->cfg.reg = data->base + cfg_hw->reg_offset;
+ ret = devm_clk_hw_register(dev, &cfg_hw->cfg.hw);
+ if (ret)
+ return dev_err_probe(dev, ret, "failed to register clock id: %d\n",
+ cfg_hw->id);
+
+ id = cfg_hw->id;
+ data->hw_data.hws[id] = &cfg_hw->cfg.hw;
+ }
+
+ return 0;
+}
+
+/*
+ * peripheral clocks - devices connected to axi or ahb buses.
+ */
+
+#define CLK_PERIPH(_id, _name, _parent, _shift, _flags) { \
+ .id = _id, \
+ .periph.bit_idx = _shift, \
+ .periph.hw.init = CLK_HW_INIT_HW(_name, _parent, &clk_gate_ops, \
+ _flags), \
+ .periph.lock = &mpfs_clk_lock, \
+}
+
+#define PARENT_CLK(PARENT) (&mpfs_cfg_clks[CLK_##PARENT##_OFFSET].cfg.hw)
+
+/*
+ * Critical clocks:
+ * - CLK_ENVM: reserved by hart software services (hss) superloop monitor/m mode interrupt
+ * trap handler
+ * - CLK_MMUART0: reserved by the hss
+ * - CLK_DDRC: provides clock to the ddr subsystem
+ * - CLK_RTC: the onboard RTC's AHB bus clock must be kept running as the rtc will stop
+ * if the AHB interface clock is disabled
+ * - CLK_FICx: these provide the processor side clocks to the "FIC" (Fabric InterConnect)
+ * clock domain crossers which provide the interface to the FPGA fabric. Disabling them
+ * causes the FPGA fabric to go into reset.
+ * - CLK_ATHENA: The athena clock is FIC4, which is reserved for the Athena TeraFire.
+ */
+
+static struct mpfs_periph_hw_clock mpfs_periph_clks[] = {
+ CLK_PERIPH(CLK_ENVM, "clk_periph_envm", PARENT_CLK(AHB), 0, CLK_IS_CRITICAL),
+ CLK_PERIPH(CLK_MAC0, "clk_periph_mac0", PARENT_CLK(AHB), 1, 0),
+ CLK_PERIPH(CLK_MAC1, "clk_periph_mac1", PARENT_CLK(AHB), 2, 0),
+ CLK_PERIPH(CLK_MMC, "clk_periph_mmc", PARENT_CLK(AHB), 3, 0),
+ CLK_PERIPH(CLK_TIMER, "clk_periph_timer", PARENT_CLK(RTCREF), 4, 0),
+ CLK_PERIPH(CLK_MMUART0, "clk_periph_mmuart0", PARENT_CLK(AHB), 5, CLK_IS_CRITICAL),
+ CLK_PERIPH(CLK_MMUART1, "clk_periph_mmuart1", PARENT_CLK(AHB), 6, 0),
+ CLK_PERIPH(CLK_MMUART2, "clk_periph_mmuart2", PARENT_CLK(AHB), 7, 0),
+ CLK_PERIPH(CLK_MMUART3, "clk_periph_mmuart3", PARENT_CLK(AHB), 8, 0),
+ CLK_PERIPH(CLK_MMUART4, "clk_periph_mmuart4", PARENT_CLK(AHB), 9, 0),
+ CLK_PERIPH(CLK_SPI0, "clk_periph_spi0", PARENT_CLK(AHB), 10, 0),
+ CLK_PERIPH(CLK_SPI1, "clk_periph_spi1", PARENT_CLK(AHB), 11, 0),
+ CLK_PERIPH(CLK_I2C0, "clk_periph_i2c0", PARENT_CLK(AHB), 12, 0),
+ CLK_PERIPH(CLK_I2C1, "clk_periph_i2c1", PARENT_CLK(AHB), 13, 0),
+ CLK_PERIPH(CLK_CAN0, "clk_periph_can0", PARENT_CLK(AHB), 14, 0),
+ CLK_PERIPH(CLK_CAN1, "clk_periph_can1", PARENT_CLK(AHB), 15, 0),
+ CLK_PERIPH(CLK_USB, "clk_periph_usb", PARENT_CLK(AHB), 16, 0),
+ CLK_PERIPH(CLK_RTC, "clk_periph_rtc", PARENT_CLK(AHB), 18, CLK_IS_CRITICAL),
+ CLK_PERIPH(CLK_QSPI, "clk_periph_qspi", PARENT_CLK(AHB), 19, 0),
+ CLK_PERIPH(CLK_GPIO0, "clk_periph_gpio0", PARENT_CLK(AHB), 20, 0),
+ CLK_PERIPH(CLK_GPIO1, "clk_periph_gpio1", PARENT_CLK(AHB), 21, 0),
+ CLK_PERIPH(CLK_GPIO2, "clk_periph_gpio2", PARENT_CLK(AHB), 22, 0),
+ CLK_PERIPH(CLK_DDRC, "clk_periph_ddrc", PARENT_CLK(AHB), 23, CLK_IS_CRITICAL),
+ CLK_PERIPH(CLK_FIC0, "clk_periph_fic0", PARENT_CLK(AXI), 24, CLK_IS_CRITICAL),
+ CLK_PERIPH(CLK_FIC1, "clk_periph_fic1", PARENT_CLK(AXI), 25, CLK_IS_CRITICAL),
+ CLK_PERIPH(CLK_FIC2, "clk_periph_fic2", PARENT_CLK(AXI), 26, CLK_IS_CRITICAL),
+ CLK_PERIPH(CLK_FIC3, "clk_periph_fic3", PARENT_CLK(AXI), 27, CLK_IS_CRITICAL),
+ CLK_PERIPH(CLK_ATHENA, "clk_periph_athena", PARENT_CLK(AXI), 28, CLK_IS_CRITICAL),
+ CLK_PERIPH(CLK_CFM, "clk_periph_cfm", PARENT_CLK(AHB), 29, 0),
+};
+
+static int mpfs_clk_register_periphs(struct device *dev, struct mpfs_periph_hw_clock *periph_hws,
+ int num_clks, struct mpfs_clock_data *data)
+{
+ unsigned int i, id;
+ int ret;
+
+ for (i = 0; i < num_clks; i++) {
+ struct mpfs_periph_hw_clock *periph_hw = &periph_hws[i];
+
+ periph_hw->periph.reg = data->base + REG_SUBBLK_CLOCK_CR;
+ ret = devm_clk_hw_register(dev, &periph_hw->periph.hw);
+ if (ret)
+ return dev_err_probe(dev, ret, "failed to register clock id: %d\n",
+ periph_hw->id);
+
+ id = periph_hws[i].id;
+ data->hw_data.hws[id] = &periph_hw->periph.hw;
+ }
+
+ return 0;
+}
+
+/*
+ * Peripheral clock resets
+ */
+
+#if IS_ENABLED(CONFIG_RESET_CONTROLLER)
+
+u32 mpfs_reset_read(struct device *dev)
+{
+ struct mpfs_clock_data *clock_data = dev_get_drvdata(dev->parent);
+
+ return readl_relaxed(clock_data->base + REG_SUBBLK_RESET_CR);
+}
+EXPORT_SYMBOL_NS_GPL(mpfs_reset_read, MCHP_CLK_MPFS);
+
+void mpfs_reset_write(struct device *dev, u32 val)
+{
+ struct mpfs_clock_data *clock_data = dev_get_drvdata(dev->parent);
+
+ writel_relaxed(val, clock_data->base + REG_SUBBLK_RESET_CR);
+}
+EXPORT_SYMBOL_NS_GPL(mpfs_reset_write, MCHP_CLK_MPFS);
+
+static void mpfs_reset_unregister_adev(void *_adev)
+{
+ struct auxiliary_device *adev = _adev;
+
+ auxiliary_device_delete(adev);
+ auxiliary_device_uninit(adev);
+}
+
+static void mpfs_reset_adev_release(struct device *dev)
+{
+ struct auxiliary_device *adev = to_auxiliary_dev(dev);
+
+ kfree(adev);
+}
+
+static struct auxiliary_device *mpfs_reset_adev_alloc(struct mpfs_clock_data *clk_data)
+{
+ struct auxiliary_device *adev;
+ int ret;
+
+ adev = kzalloc(sizeof(*adev), GFP_KERNEL);
+ if (!adev)
+ return ERR_PTR(-ENOMEM);
+
+ adev->name = "reset-mpfs";
+ adev->dev.parent = clk_data->dev;
+ adev->dev.release = mpfs_reset_adev_release;
+ adev->id = 666u;
+
+ ret = auxiliary_device_init(adev);
+ if (ret) {
+ kfree(adev);
+ return ERR_PTR(ret);
+ }
+
+ return adev;
+}
+
+static int mpfs_reset_controller_register(struct mpfs_clock_data *clk_data)
+{
+ struct auxiliary_device *adev;
+ int ret;
+
+ adev = mpfs_reset_adev_alloc(clk_data);
+ if (IS_ERR(adev))
+ return PTR_ERR(adev);
+
+ ret = auxiliary_device_add(adev);
+ if (ret) {
+ auxiliary_device_uninit(adev);
+ return ret;
+ }
+
+ return devm_add_action_or_reset(clk_data->dev, mpfs_reset_unregister_adev, adev);
+}
+
+#else /* !CONFIG_RESET_CONTROLLER */
+
+static int mpfs_reset_controller_register(struct mpfs_clock_data *clk_data)
+{
+ return 0;
+}
+
+#endif /* !CONFIG_RESET_CONTROLLER */
+
+static int mpfs_clk_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct mpfs_clock_data *clk_data;
+ unsigned int num_clks;
+ int ret;
+
+ /* CLK_RESERVED is not part of clock arrays, so add 1 */
+ num_clks = ARRAY_SIZE(mpfs_msspll_clks) + ARRAY_SIZE(mpfs_cfg_clks)
+ + ARRAY_SIZE(mpfs_periph_clks) + 1;
+
+ clk_data = devm_kzalloc(dev, struct_size(clk_data, hw_data.hws, num_clks), GFP_KERNEL);
+ if (!clk_data)
+ return -ENOMEM;
+
+ clk_data->base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(clk_data->base))
+ return PTR_ERR(clk_data->base);
+
+ clk_data->msspll_base = devm_platform_ioremap_resource(pdev, 1);
+ if (IS_ERR(clk_data->msspll_base))
+ return PTR_ERR(clk_data->msspll_base);
+
+ clk_data->hw_data.num = num_clks;
+ clk_data->dev = dev;
+ dev_set_drvdata(dev, clk_data);
+
+ ret = mpfs_clk_register_mssplls(dev, mpfs_msspll_clks, ARRAY_SIZE(mpfs_msspll_clks),
+ clk_data);
+ if (ret)
+ return ret;
+
+ ret = mpfs_clk_register_cfgs(dev, mpfs_cfg_clks, ARRAY_SIZE(mpfs_cfg_clks), clk_data);
+ if (ret)
+ return ret;
+
+ ret = mpfs_clk_register_periphs(dev, mpfs_periph_clks, ARRAY_SIZE(mpfs_periph_clks),
+ clk_data);
+ if (ret)
+ return ret;
+
+ ret = devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get, &clk_data->hw_data);
+ if (ret)
+ return ret;
+
+ return mpfs_reset_controller_register(clk_data);
+}
+
+static const struct of_device_id mpfs_clk_of_match_table[] = {
+ { .compatible = "microchip,mpfs-clkcfg", },
+ {}
+};
+MODULE_DEVICE_TABLE(of, mpfs_clk_of_match_table);
+
+static struct platform_driver mpfs_clk_driver = {
+ .probe = mpfs_clk_probe,
+ .driver = {
+ .name = "microchip-mpfs-clkcfg",
+ .of_match_table = mpfs_clk_of_match_table,
+ },
+};
+
+static int __init clk_mpfs_init(void)
+{
+ return platform_driver_register(&mpfs_clk_driver);
+}
+core_initcall(clk_mpfs_init);
+
+static void __exit clk_mpfs_exit(void)
+{
+ platform_driver_unregister(&mpfs_clk_driver);
+}
+module_exit(clk_mpfs_exit);
+
+MODULE_DESCRIPTION("Microchip PolarFire SoC Clock Driver");
+MODULE_AUTHOR("Padmarao Begari <padmarao.begari@microchip.com>");
+MODULE_AUTHOR("Daire McNamara <daire.mcnamara@microchip.com>");
+MODULE_AUTHOR("Conor Dooley <conor.dooley@microchip.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/clk/microchip/clk-pic32mzda.c b/drivers/clk/microchip/clk-pic32mzda.c
new file mode 100644
index 000000000..b72c76f9e
--- /dev/null
+++ b/drivers/clk/microchip/clk-pic32mzda.c
@@ -0,0 +1,269 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Purna Chandra Mandal,<purna.mandal@microchip.com>
+ * Copyright (C) 2015 Microchip Technology Inc. All rights reserved.
+ */
+#include <dt-bindings/clock/microchip,pic32-clock.h>
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/clkdev.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <asm/traps.h>
+
+#include "clk-core.h"
+
+/* FRC Postscaler */
+#define OSC_FRCDIV_MASK 0x07
+#define OSC_FRCDIV_SHIFT 24
+
+/* SPLL fields */
+#define PLL_ICLK_MASK 0x01
+#define PLL_ICLK_SHIFT 7
+
+#define DECLARE_PERIPHERAL_CLOCK(__clk_name, __reg, __flags) \
+ { \
+ .ctrl_reg = (__reg), \
+ .init_data = { \
+ .name = (__clk_name), \
+ .parent_names = (const char *[]) { \
+ "sys_clk" \
+ }, \
+ .num_parents = 1, \
+ .ops = &pic32_pbclk_ops, \
+ .flags = (__flags), \
+ }, \
+ }
+
+#define DECLARE_REFO_CLOCK(__clkid, __reg) \
+ { \
+ .ctrl_reg = (__reg), \
+ .init_data = { \
+ .name = "refo" #__clkid "_clk", \
+ .parent_names = (const char *[]) { \
+ "sys_clk", "pb1_clk", "posc_clk", \
+ "frc_clk", "lprc_clk", "sosc_clk", \
+ "sys_pll", "refi" #__clkid "_clk", \
+ "bfrc_clk", \
+ }, \
+ .num_parents = 9, \
+ .flags = CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE,\
+ .ops = &pic32_roclk_ops, \
+ }, \
+ .parent_map = (const u32[]) { \
+ 0, 1, 2, 3, 4, 5, 7, 8, 9 \
+ }, \
+ }
+
+static const struct pic32_ref_osc_data ref_clks[] = {
+ DECLARE_REFO_CLOCK(1, 0x80),
+ DECLARE_REFO_CLOCK(2, 0xa0),
+ DECLARE_REFO_CLOCK(3, 0xc0),
+ DECLARE_REFO_CLOCK(4, 0xe0),
+ DECLARE_REFO_CLOCK(5, 0x100),
+};
+
+static const struct pic32_periph_clk_data periph_clocks[] = {
+ DECLARE_PERIPHERAL_CLOCK("pb1_clk", 0x140, 0),
+ DECLARE_PERIPHERAL_CLOCK("pb2_clk", 0x150, CLK_IGNORE_UNUSED),
+ DECLARE_PERIPHERAL_CLOCK("pb3_clk", 0x160, 0),
+ DECLARE_PERIPHERAL_CLOCK("pb4_clk", 0x170, 0),
+ DECLARE_PERIPHERAL_CLOCK("pb5_clk", 0x180, 0),
+ DECLARE_PERIPHERAL_CLOCK("pb6_clk", 0x190, 0),
+ DECLARE_PERIPHERAL_CLOCK("cpu_clk", 0x1a0, CLK_IGNORE_UNUSED),
+};
+
+static const struct pic32_sys_clk_data sys_mux_clk = {
+ .slew_reg = 0x1c0,
+ .slew_div = 2, /* step of div_4 -> div_2 -> no_div */
+ .init_data = {
+ .name = "sys_clk",
+ .parent_names = (const char *[]) {
+ "frcdiv_clk", "sys_pll", "posc_clk",
+ "sosc_clk", "lprc_clk", "frcdiv_clk",
+ },
+ .num_parents = 6,
+ .ops = &pic32_sclk_ops,
+ },
+ .parent_map = (const u32[]) {
+ 0, 1, 2, 4, 5, 7,
+ },
+};
+
+static const struct pic32_sys_pll_data sys_pll = {
+ .ctrl_reg = 0x020,
+ .status_reg = 0x1d0,
+ .lock_mask = BIT(7),
+ .init_data = {
+ .name = "sys_pll",
+ .parent_names = (const char *[]) {
+ "spll_mux_clk"
+ },
+ .num_parents = 1,
+ .ops = &pic32_spll_ops,
+ },
+};
+
+static const struct pic32_sec_osc_data sosc_clk = {
+ .status_reg = 0x1d0,
+ .enable_mask = BIT(1),
+ .status_mask = BIT(4),
+ .fixed_rate = 32768,
+ .init_data = {
+ .name = "sosc_clk",
+ .parent_names = NULL,
+ .ops = &pic32_sosc_ops,
+ },
+};
+
+static int pic32mzda_critical_clks[] = {
+ PB2CLK, PB7CLK
+};
+
+/* PIC32MZDA clock data */
+struct pic32mzda_clk_data {
+ struct clk *clks[MAXCLKS];
+ struct pic32_clk_common core;
+ struct clk_onecell_data onecell_data;
+ struct notifier_block failsafe_notifier;
+};
+
+static int pic32_fscm_nmi(struct notifier_block *nb,
+ unsigned long action, void *data)
+{
+ struct pic32mzda_clk_data *cd;
+
+ cd = container_of(nb, struct pic32mzda_clk_data, failsafe_notifier);
+
+ /* SYSCLK is now running from BFRCCLK. Report clock failure. */
+ if (readl(cd->core.iobase) & BIT(2))
+ pr_alert("pic32-clk: FSCM detected clk failure.\n");
+
+ /* TODO: detect reason of failure and recover accordingly */
+
+ return NOTIFY_OK;
+}
+
+static int pic32mzda_clk_probe(struct platform_device *pdev)
+{
+ const char *const pll_mux_parents[] = {"posc_clk", "frc_clk"};
+ struct device_node *np = pdev->dev.of_node;
+ struct pic32mzda_clk_data *cd;
+ struct pic32_clk_common *core;
+ struct clk *pll_mux_clk, *clk;
+ struct clk **clks;
+ int nr_clks, i, ret;
+
+ cd = devm_kzalloc(&pdev->dev, sizeof(*cd), GFP_KERNEL);
+ if (!cd)
+ return -ENOMEM;
+
+ core = &cd->core;
+ core->iobase = of_io_request_and_map(np, 0, of_node_full_name(np));
+ if (IS_ERR(core->iobase)) {
+ dev_err(&pdev->dev, "pic32-clk: failed to map registers\n");
+ return PTR_ERR(core->iobase);
+ }
+
+ spin_lock_init(&core->reg_lock);
+ core->dev = &pdev->dev;
+ clks = &cd->clks[0];
+
+ /* register fixed rate clocks */
+ clks[POSCCLK] = clk_register_fixed_rate(&pdev->dev, "posc_clk", NULL,
+ 0, 24000000);
+ clks[FRCCLK] = clk_register_fixed_rate(&pdev->dev, "frc_clk", NULL,
+ 0, 8000000);
+ clks[BFRCCLK] = clk_register_fixed_rate(&pdev->dev, "bfrc_clk", NULL,
+ 0, 8000000);
+ clks[LPRCCLK] = clk_register_fixed_rate(&pdev->dev, "lprc_clk", NULL,
+ 0, 32000);
+ clks[UPLLCLK] = clk_register_fixed_rate(&pdev->dev, "usbphy_clk", NULL,
+ 0, 24000000);
+ /* fixed rate (optional) clock */
+ if (of_find_property(np, "microchip,pic32mzda-sosc", NULL)) {
+ pr_info("pic32-clk: dt requests SOSC.\n");
+ clks[SOSCCLK] = pic32_sosc_clk_register(&sosc_clk, core);
+ }
+ /* divider clock */
+ clks[FRCDIVCLK] = clk_register_divider(&pdev->dev, "frcdiv_clk",
+ "frc_clk", 0,
+ core->iobase,
+ OSC_FRCDIV_SHIFT,
+ OSC_FRCDIV_MASK,
+ CLK_DIVIDER_POWER_OF_TWO,
+ &core->reg_lock);
+ /* PLL ICLK mux */
+ pll_mux_clk = clk_register_mux(&pdev->dev, "spll_mux_clk",
+ pll_mux_parents, 2, 0,
+ core->iobase + 0x020,
+ PLL_ICLK_SHIFT, 1, 0, &core->reg_lock);
+ if (IS_ERR(pll_mux_clk))
+ pr_err("spll_mux_clk: clk register failed\n");
+
+ /* PLL */
+ clks[PLLCLK] = pic32_spll_clk_register(&sys_pll, core);
+ /* SYSTEM clock */
+ clks[SCLK] = pic32_sys_clk_register(&sys_mux_clk, core);
+ /* Peripheral bus clocks */
+ for (nr_clks = PB1CLK, i = 0; nr_clks <= PB7CLK; i++, nr_clks++)
+ clks[nr_clks] = pic32_periph_clk_register(&periph_clocks[i],
+ core);
+ /* Reference oscillator clock */
+ for (nr_clks = REF1CLK, i = 0; nr_clks <= REF5CLK; i++, nr_clks++)
+ clks[nr_clks] = pic32_refo_clk_register(&ref_clks[i], core);
+
+ /* register clkdev */
+ for (i = 0; i < MAXCLKS; i++) {
+ if (IS_ERR(clks[i]))
+ continue;
+ clk_register_clkdev(clks[i], NULL, __clk_get_name(clks[i]));
+ }
+
+ /* register clock provider */
+ cd->onecell_data.clks = clks;
+ cd->onecell_data.clk_num = MAXCLKS;
+ ret = of_clk_add_provider(np, of_clk_src_onecell_get,
+ &cd->onecell_data);
+ if (ret)
+ return ret;
+
+ /* force enable critical clocks */
+ for (i = 0; i < ARRAY_SIZE(pic32mzda_critical_clks); i++) {
+ clk = clks[pic32mzda_critical_clks[i]];
+ if (clk_prepare_enable(clk))
+ dev_err(&pdev->dev, "clk_prepare_enable(%s) failed\n",
+ __clk_get_name(clk));
+ }
+
+ /* register NMI for failsafe clock monitor */
+ cd->failsafe_notifier.notifier_call = pic32_fscm_nmi;
+ return register_nmi_notifier(&cd->failsafe_notifier);
+}
+
+static const struct of_device_id pic32mzda_clk_match_table[] = {
+ { .compatible = "microchip,pic32mzda-clk", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, pic32mzda_clk_match_table);
+
+static struct platform_driver pic32mzda_clk_driver = {
+ .probe = pic32mzda_clk_probe,
+ .driver = {
+ .name = "clk-pic32mzda",
+ .of_match_table = pic32mzda_clk_match_table,
+ },
+};
+
+static int __init microchip_pic32mzda_clk_init(void)
+{
+ return platform_driver_register(&pic32mzda_clk_driver);
+}
+core_initcall(microchip_pic32mzda_clk_init);
+
+MODULE_DESCRIPTION("Microchip PIC32MZDA Clock Driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:clk-pic32mzda");