Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 361 insertions, 0 deletions

diff --git a/drivers/clk/ti/clk-3xxx.c b/drivers/clk/ti/clk-3xxx.c
new file mode 100644
index 000000000..8aa5f5793
--- /dev/null
+++ b/drivers/clk/ti/clk-3xxx.c
@@ -0,0 +1,361 @@
+/*
+ * OMAP3 Clock init
+ *
+ * Copyright (C) 2013 Texas Instruments, Inc
+ *     Tero Kristo (t-kristo@ti.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/clk/ti.h>
+
+#include "clock.h"
+
+#define OMAP3430ES2_ST_DSS_IDLE_SHIFT			1
+#define OMAP3430ES2_ST_HSOTGUSB_IDLE_SHIFT		5
+#define OMAP3430ES2_ST_SSI_IDLE_SHIFT			8
+
+#define OMAP34XX_CM_IDLEST_VAL				1
+
+/*
+ * In AM35xx IPSS, the {ICK,FCK} enable bits for modules are exported
+ * in the same register at a bit offset of 0x8. The EN_ACK for ICK is
+ * at an offset of 4 from ICK enable bit.
+ */
+#define AM35XX_IPSS_ICK_MASK			0xF
+#define AM35XX_IPSS_ICK_EN_ACK_OFFSET		0x4
+#define AM35XX_IPSS_ICK_FCK_OFFSET		0x8
+#define AM35XX_IPSS_CLK_IDLEST_VAL		0
+
+#define AM35XX_ST_IPSS_SHIFT			5
+
+/**
+ * omap3430es2_clk_ssi_find_idlest - return CM_IDLEST info for SSI
+ * @clk: struct clk * being enabled
+ * @idlest_reg: void __iomem ** to store CM_IDLEST reg address into
+ * @idlest_bit: pointer to a u8 to store the CM_IDLEST bit shift into
+ * @idlest_val: pointer to a u8 to store the CM_IDLEST indicator
+ *
+ * The OMAP3430ES2 SSI target CM_IDLEST bit is at a different shift
+ * from the CM_{I,F}CLKEN bit.  Pass back the correct info via
+ * @idlest_reg and @idlest_bit.  No return value.
+ */
+static void omap3430es2_clk_ssi_find_idlest(struct clk_hw_omap *clk,
+					    struct clk_omap_reg *idlest_reg,
+					    u8 *idlest_bit,
+					    u8 *idlest_val)
+{
+	memcpy(idlest_reg, &clk->enable_reg, sizeof(*idlest_reg));
+	idlest_reg->offset &= ~0xf0;
+	idlest_reg->offset |= 0x20;
+	*idlest_bit = OMAP3430ES2_ST_SSI_IDLE_SHIFT;
+	*idlest_val = OMAP34XX_CM_IDLEST_VAL;
+}
+
+const struct clk_hw_omap_ops clkhwops_omap3430es2_iclk_ssi_wait = {
+	.allow_idle	= omap2_clkt_iclk_allow_idle,
+	.deny_idle	= omap2_clkt_iclk_deny_idle,
+	.find_idlest	= omap3430es2_clk_ssi_find_idlest,
+	.find_companion	= omap2_clk_dflt_find_companion,
+};
+
+/**
+ * omap3430es2_clk_dss_usbhost_find_idlest - CM_IDLEST info for DSS, USBHOST
+ * @clk: struct clk * being enabled
+ * @idlest_reg: void __iomem ** to store CM_IDLEST reg address into
+ * @idlest_bit: pointer to a u8 to store the CM_IDLEST bit shift into
+ * @idlest_val: pointer to a u8 to store the CM_IDLEST indicator
+ *
+ * Some OMAP modules on OMAP3 ES2+ chips have both initiator and
+ * target IDLEST bits.  For our purposes, we are concerned with the
+ * target IDLEST bits, which exist at a different bit position than
+ * the *CLKEN bit position for these modules (DSS and USBHOST) (The
+ * default find_idlest code assumes that they are at the same
+ * position.)  No return value.
+ */
+static void
+omap3430es2_clk_dss_usbhost_find_idlest(struct clk_hw_omap *clk,
+					struct clk_omap_reg *idlest_reg,
+					u8 *idlest_bit, u8 *idlest_val)
+{
+	memcpy(idlest_reg, &clk->enable_reg, sizeof(*idlest_reg));
+
+	idlest_reg->offset &= ~0xf0;
+	idlest_reg->offset |= 0x20;
+	/* USBHOST_IDLE has same shift */
+	*idlest_bit = OMAP3430ES2_ST_DSS_IDLE_SHIFT;
+	*idlest_val = OMAP34XX_CM_IDLEST_VAL;
+}
+
+const struct clk_hw_omap_ops clkhwops_omap3430es2_dss_usbhost_wait = {
+	.find_idlest	= omap3430es2_clk_dss_usbhost_find_idlest,
+	.find_companion	= omap2_clk_dflt_find_companion,
+};
+
+const struct clk_hw_omap_ops clkhwops_omap3430es2_iclk_dss_usbhost_wait = {
+	.allow_idle	= omap2_clkt_iclk_allow_idle,
+	.deny_idle	= omap2_clkt_iclk_deny_idle,
+	.find_idlest	= omap3430es2_clk_dss_usbhost_find_idlest,
+	.find_companion	= omap2_clk_dflt_find_companion,
+};
+
+/**
+ * omap3430es2_clk_hsotgusb_find_idlest - return CM_IDLEST info for HSOTGUSB
+ * @clk: struct clk * being enabled
+ * @idlest_reg: void __iomem ** to store CM_IDLEST reg address into
+ * @idlest_bit: pointer to a u8 to store the CM_IDLEST bit shift into
+ * @idlest_val: pointer to a u8 to store the CM_IDLEST indicator
+ *
+ * The OMAP3430ES2 HSOTGUSB target CM_IDLEST bit is at a different
+ * shift from the CM_{I,F}CLKEN bit.  Pass back the correct info via
+ * @idlest_reg and @idlest_bit.  No return value.
+ */
+static void
+omap3430es2_clk_hsotgusb_find_idlest(struct clk_hw_omap *clk,
+				     struct clk_omap_reg *idlest_reg,
+				     u8 *idlest_bit,
+				     u8 *idlest_val)
+{
+	memcpy(idlest_reg, &clk->enable_reg, sizeof(*idlest_reg));
+	idlest_reg->offset &= ~0xf0;
+	idlest_reg->offset |= 0x20;
+	*idlest_bit = OMAP3430ES2_ST_HSOTGUSB_IDLE_SHIFT;
+	*idlest_val = OMAP34XX_CM_IDLEST_VAL;
+}
+
+const struct clk_hw_omap_ops clkhwops_omap3430es2_iclk_hsotgusb_wait = {
+	.allow_idle	= omap2_clkt_iclk_allow_idle,
+	.deny_idle	= omap2_clkt_iclk_deny_idle,
+	.find_idlest	= omap3430es2_clk_hsotgusb_find_idlest,
+	.find_companion	= omap2_clk_dflt_find_companion,
+};
+
+/**
+ * am35xx_clk_find_idlest - return clock ACK info for AM35XX IPSS
+ * @clk: struct clk * being enabled
+ * @idlest_reg: void __iomem ** to store CM_IDLEST reg address into
+ * @idlest_bit: pointer to a u8 to store the CM_IDLEST bit shift into
+ * @idlest_val: pointer to a u8 to store the CM_IDLEST indicator
+ *
+ * The interface clocks on AM35xx IPSS reflects the clock idle status
+ * in the enable register itsel at a bit offset of 4 from the enable
+ * bit. A value of 1 indicates that clock is enabled.
+ */
+static void am35xx_clk_find_idlest(struct clk_hw_omap *clk,
+				   struct clk_omap_reg *idlest_reg,
+				   u8 *idlest_bit,
+				   u8 *idlest_val)
+{
+	memcpy(idlest_reg, &clk->enable_reg, sizeof(*idlest_reg));
+	*idlest_bit = clk->enable_bit + AM35XX_IPSS_ICK_EN_ACK_OFFSET;
+	*idlest_val = AM35XX_IPSS_CLK_IDLEST_VAL;
+}
+
+/**
+ * am35xx_clk_find_companion - find companion clock to @clk
+ * @clk: struct clk * to find the companion clock of
+ * @other_reg: void __iomem ** to return the companion clock CM_*CLKEN va in
+ * @other_bit: u8 ** to return the companion clock bit shift in
+ *
+ * Some clocks don't have companion clocks.  For example, modules with
+ * only an interface clock (such as HECC) don't have a companion
+ * clock.  Right now, this code relies on the hardware exporting a bit
+ * in the correct companion register that indicates that the
+ * nonexistent 'companion clock' is active.  Future patches will
+ * associate this type of code with per-module data structures to
+ * avoid this issue, and remove the casts.  No return value.
+ */
+static void am35xx_clk_find_companion(struct clk_hw_omap *clk,
+				      struct clk_omap_reg *other_reg,
+				      u8 *other_bit)
+{
+	memcpy(other_reg, &clk->enable_reg, sizeof(*other_reg));
+	if (clk->enable_bit & AM35XX_IPSS_ICK_MASK)
+		*other_bit = clk->enable_bit + AM35XX_IPSS_ICK_FCK_OFFSET;
+	else
+	*other_bit = clk->enable_bit - AM35XX_IPSS_ICK_FCK_OFFSET;
+}
+
+const struct clk_hw_omap_ops clkhwops_am35xx_ipss_module_wait = {
+	.find_idlest	= am35xx_clk_find_idlest,
+	.find_companion	= am35xx_clk_find_companion,
+};
+
+/**
+ * am35xx_clk_ipss_find_idlest - return CM_IDLEST info for IPSS
+ * @clk: struct clk * being enabled
+ * @idlest_reg: void __iomem ** to store CM_IDLEST reg address into
+ * @idlest_bit: pointer to a u8 to store the CM_IDLEST bit shift into
+ * @idlest_val: pointer to a u8 to store the CM_IDLEST indicator
+ *
+ * The IPSS target CM_IDLEST bit is at a different shift from the
+ * CM_{I,F}CLKEN bit.  Pass back the correct info via @idlest_reg
+ * and @idlest_bit.  No return value.
+ */
+static void am35xx_clk_ipss_find_idlest(struct clk_hw_omap *clk,
+					struct clk_omap_reg *idlest_reg,
+					u8 *idlest_bit,
+					u8 *idlest_val)
+{
+	memcpy(idlest_reg, &clk->enable_reg, sizeof(*idlest_reg));
+
+	idlest_reg->offset &= ~0xf0;
+	idlest_reg->offset |= 0x20;
+	*idlest_bit = AM35XX_ST_IPSS_SHIFT;
+	*idlest_val = OMAP34XX_CM_IDLEST_VAL;
+}
+
+const struct clk_hw_omap_ops clkhwops_am35xx_ipss_wait = {
+	.allow_idle	= omap2_clkt_iclk_allow_idle,
+	.deny_idle	= omap2_clkt_iclk_deny_idle,
+	.find_idlest	= am35xx_clk_ipss_find_idlest,
+	.find_companion	= omap2_clk_dflt_find_companion,
+};
+
+static struct ti_dt_clk omap3xxx_clks[] = {
+	DT_CLK(NULL, "timer_32k_ck", "omap_32k_fck"),
+	DT_CLK(NULL, "timer_sys_ck", "sys_ck"),
+	{ .node_name = NULL },
+};
+
+static struct ti_dt_clk omap36xx_omap3430es2plus_clks[] = {
+	DT_CLK(NULL, "ssi_ssr_fck", "ssi_ssr_fck_3430es2"),
+	DT_CLK(NULL, "ssi_sst_fck", "ssi_sst_fck_3430es2"),
+	DT_CLK(NULL, "hsotgusb_ick", "hsotgusb_ick_3430es2"),
+	DT_CLK(NULL, "ssi_ick", "ssi_ick_3430es2"),
+	{ .node_name = NULL },
+};
+
+static struct ti_dt_clk omap3430es1_clks[] = {
+	DT_CLK(NULL, "ssi_ssr_fck", "ssi_ssr_fck_3430es1"),
+	DT_CLK(NULL, "ssi_sst_fck", "ssi_sst_fck_3430es1"),
+	DT_CLK(NULL, "hsotgusb_ick", "hsotgusb_ick_3430es1"),
+	DT_CLK(NULL, "ssi_ick", "ssi_ick_3430es1"),
+	DT_CLK(NULL, "dss1_alwon_fck", "dss1_alwon_fck_3430es1"),
+	DT_CLK(NULL, "dss_ick", "dss_ick_3430es1"),
+	{ .node_name = NULL },
+};
+
+static struct ti_dt_clk omap36xx_am35xx_omap3430es2plus_clks[] = {
+	DT_CLK(NULL, "dss1_alwon_fck", "dss1_alwon_fck_3430es2"),
+	DT_CLK(NULL, "dss_ick", "dss_ick_3430es2"),
+	{ .node_name = NULL },
+};
+
+static struct ti_dt_clk am35xx_clks[] = {
+	DT_CLK(NULL, "hsotgusb_ick", "hsotgusb_ick_am35xx"),
+	DT_CLK(NULL, "hsotgusb_fck", "hsotgusb_fck_am35xx"),
+	DT_CLK(NULL, "uart4_ick", "uart4_ick_am35xx"),
+	DT_CLK(NULL, "uart4_fck", "uart4_fck_am35xx"),
+	{ .node_name = NULL },
+};
+
+static const char *enable_init_clks[] = {
+	"sdrc_ick",
+	"gpmc_fck",
+	"omapctrl_ick",
+};
+
+enum {
+	OMAP3_SOC_AM35XX,
+	OMAP3_SOC_OMAP3430_ES1,
+	OMAP3_SOC_OMAP3430_ES2_PLUS,
+	OMAP3_SOC_OMAP3630,
+};
+
+/**
+ * omap3_clk_lock_dpll5 - locks DPLL5
+ *
+ * Locks DPLL5 to a pre-defined frequency. This is required for proper
+ * operation of USB.
+ */
+void __init omap3_clk_lock_dpll5(void)
+{
+	struct clk *dpll5_clk;
+	struct clk *dpll5_m2_clk;
+
+	/*
+	 * Errata sprz319f advisory 2.1 documents a USB host clock drift issue
+	 * that can be worked around using specially crafted dpll5 settings
+	 * with a dpll5_m2 divider set to 8. Set the dpll5 rate to 8x the USB
+	 * host clock rate, its .set_rate handler() will detect that frequency
+	 * and use the errata settings.
+	 */
+	dpll5_clk = clk_get(NULL, "dpll5_ck");
+	clk_set_rate(dpll5_clk, OMAP3_DPLL5_FREQ_FOR_USBHOST * 8);
+	clk_prepare_enable(dpll5_clk);
+
+	/* Program dpll5_m2_clk divider */
+	dpll5_m2_clk = clk_get(NULL, "dpll5_m2_ck");
+	clk_prepare_enable(dpll5_m2_clk);
+	clk_set_rate(dpll5_m2_clk, OMAP3_DPLL5_FREQ_FOR_USBHOST);
+
+	clk_disable_unprepare(dpll5_m2_clk);
+	clk_disable_unprepare(dpll5_clk);
+}
+
+static int __init omap3xxx_dt_clk_init(int soc_type)
+{
+	if (soc_type == OMAP3_SOC_AM35XX || soc_type == OMAP3_SOC_OMAP3630 ||
+	    soc_type == OMAP3_SOC_OMAP3430_ES1 ||
+	    soc_type == OMAP3_SOC_OMAP3430_ES2_PLUS)
+		ti_dt_clocks_register(omap3xxx_clks);
+
+	if (soc_type == OMAP3_SOC_AM35XX)
+		ti_dt_clocks_register(am35xx_clks);
+
+	if (soc_type == OMAP3_SOC_OMAP3630 || soc_type == OMAP3_SOC_AM35XX ||
+	    soc_type == OMAP3_SOC_OMAP3430_ES2_PLUS)
+		ti_dt_clocks_register(omap36xx_am35xx_omap3430es2plus_clks);
+
+	if (soc_type == OMAP3_SOC_OMAP3430_ES1)
+		ti_dt_clocks_register(omap3430es1_clks);
+
+	if (soc_type == OMAP3_SOC_OMAP3430_ES2_PLUS ||
+	    soc_type == OMAP3_SOC_OMAP3630)
+		ti_dt_clocks_register(omap36xx_omap3430es2plus_clks);
+
+	omap2_clk_disable_autoidle_all();
+
+	ti_clk_add_aliases();
+
+	omap2_clk_enable_init_clocks(enable_init_clks,
+				     ARRAY_SIZE(enable_init_clks));
+
+	pr_info("Clocking rate (Crystal/Core/MPU): %ld.%01ld/%ld/%ld MHz\n",
+		(clk_get_rate(clk_get_sys(NULL, "osc_sys_ck")) / 1000000),
+		(clk_get_rate(clk_get_sys(NULL, "osc_sys_ck")) / 100000) % 10,
+		(clk_get_rate(clk_get_sys(NULL, "core_ck")) / 1000000),
+		(clk_get_rate(clk_get_sys(NULL, "arm_fck")) / 1000000));
+
+	if (soc_type != OMAP3_SOC_OMAP3430_ES1)
+		omap3_clk_lock_dpll5();
+
+	return 0;
+}
+
+int __init omap3430_dt_clk_init(void)
+{
+	return omap3xxx_dt_clk_init(OMAP3_SOC_OMAP3430_ES2_PLUS);
+}
+
+int __init omap3630_dt_clk_init(void)
+{
+	return omap3xxx_dt_clk_init(OMAP3_SOC_OMAP3630);
+}
+
+int __init am35xx_dt_clk_init(void)
+{
+	return omap3xxx_dt_clk_init(OMAP3_SOC_AM35XX);
+}