From 2f7c68cb55ecb7331f2381deb497c27155f32faf Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 03 Jan 2024 09:43:39 +0000
Subject: [PATCH] update kernel to 5.10.198
---
kernel/drivers/clk/renesas/renesas-cpg-mssr.c | 354 +++++++++++++++++++++++++++++++++++++++++++++-------------
1 files changed, 272 insertions(+), 82 deletions(-)
diff --git a/kernel/drivers/clk/renesas/renesas-cpg-mssr.c b/kernel/drivers/clk/renesas/renesas-cpg-mssr.c
index 7928925..a5a68e1 100644
--- a/kernel/drivers/clk/renesas/renesas-cpg-mssr.c
+++ b/kernel/drivers/clk/renesas/renesas-cpg-mssr.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Renesas Clock Pulse Generator / Module Standby and Software Reset
*
@@ -7,10 +8,6 @@
*
* Copyright (C) 2013 Ideas On Board SPRL
* Copyright (C) 2015 Renesas Electronics Corp.
- *
- * 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 of the License.
*/
#include <linux/clk.h>
@@ -19,6 +16,7 @@
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/init.h>
+#include <linux/io.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/of_address.h>
@@ -59,8 +57,10 @@
0x9A0, 0x9A4, 0x9A8, 0x9AC,
};
-#define MSTPSR(i) mstpsr[i]
-
+static const u16 mstpsr_for_v3u[] = {
+ 0x2E00, 0x2E04, 0x2E08, 0x2E0C, 0x2E10, 0x2E14, 0x2E18, 0x2E1C,
+ 0x2E20, 0x2E24, 0x2E28, 0x2E2C, 0x2E30, 0x2E34, 0x2E38,
+};
/*
* System Module Stop Control Register offsets
@@ -71,8 +71,20 @@
0x990, 0x994, 0x998, 0x99C,
};
-#define SMSTPCR(i) smstpcr[i]
+static const u16 mstpcr_for_v3u[] = {
+ 0x2D00, 0x2D04, 0x2D08, 0x2D0C, 0x2D10, 0x2D14, 0x2D18, 0x2D1C,
+ 0x2D20, 0x2D24, 0x2D28, 0x2D2C, 0x2D30, 0x2D34, 0x2D38,
+};
+/*
+ * Standby Control Register offsets (RZ/A)
+ * Base address is FRQCR register
+ */
+
+static const u16 stbcr[] = {
+ 0xFFFF/*dummy*/, 0x010, 0x014, 0x410, 0x414, 0x418, 0x41C, 0x420,
+ 0x424, 0x428, 0x42C,
+};
/*
* Software Reset Register offsets
@@ -83,8 +95,10 @@
0x920, 0x924, 0x928, 0x92C,
};
-#define SRCR(i) srcr[i]
-
+static const u16 srcr_for_v3u[] = {
+ 0x2C00, 0x2C04, 0x2C08, 0x2C0C, 0x2C10, 0x2C14, 0x2C18, 0x2C1C,
+ 0x2C20, 0x2C24, 0x2C28, 0x2C2C, 0x2C30, 0x2C34, 0x2C38,
+};
/* Realtime Module Stop Control Register offsets */
#define RMSTPCR(i) (smstpcr[i] - 0x20)
@@ -93,8 +107,16 @@
#define MMSTPCR(i) (smstpcr[i] + 0x20)
/* Software Reset Clearing Register offsets */
-#define SRSTCLR(i) (0x940 + (i) * 4)
+static const u16 srstclr[] = {
+ 0x940, 0x944, 0x948, 0x94C, 0x950, 0x954, 0x958, 0x95C,
+ 0x960, 0x964, 0x968, 0x96C,
+};
+
+static const u16 srstclr_for_v3u[] = {
+ 0x2C80, 0x2C84, 0x2C88, 0x2C8C, 0x2C90, 0x2C94, 0x2C98, 0x2C9C,
+ 0x2CA0, 0x2CA4, 0x2CA8, 0x2CAC, 0x2CB0, 0x2CB4, 0x2CB8,
+};
/**
* Clock Pulse Generator / Module Standby and Software Reset Private Data
@@ -102,14 +124,20 @@
* @rcdev: Optional reset controller entity
* @dev: CPG/MSSR device
* @base: CPG/MSSR register block base address
+ * @reg_layout: CPG/MSSR register layout
* @rmw_lock: protects RMW register accesses
- * @clks: Array containing all Core and Module Clocks
+ * @np: Device node in DT for this CPG/MSSR module
* @num_core_clks: Number of Core Clocks in clks[]
* @num_mod_clks: Number of Module Clocks in clks[]
* @last_dt_core_clk: ID of the last Core Clock exported to DT
* @notifiers: Notifier chain to save/restore clock state for system resume
+ * @status_regs: Pointer to status registers array
+ * @control_regs: Pointer to control registers array
+ * @reset_regs: Pointer to reset registers array
+ * @reset_clear_regs: Pointer to reset clearing registers array
* @smstpcr_saved[].mask: Mask of SMSTPCR[] bits under our control
* @smstpcr_saved[].val: Saved values of SMSTPCR[]
+ * @clks: Array containing all Core and Module Clocks
*/
struct cpg_mssr_priv {
#ifdef CONFIG_RESET_CONTROLLER
@@ -117,20 +145,28 @@
#endif
struct device *dev;
void __iomem *base;
+ enum clk_reg_layout reg_layout;
spinlock_t rmw_lock;
+ struct device_node *np;
- struct clk **clks;
unsigned int num_core_clks;
unsigned int num_mod_clks;
unsigned int last_dt_core_clk;
struct raw_notifier_head notifiers;
+ const u16 *status_regs;
+ const u16 *control_regs;
+ const u16 *reset_regs;
+ const u16 *reset_clear_regs;
struct {
u32 mask;
u32 val;
- } smstpcr_saved[ARRAY_SIZE(smstpcr)];
+ } smstpcr_saved[ARRAY_SIZE(mstpsr_for_v3u)];
+
+ struct clk *clks[];
};
+static struct cpg_mssr_priv *cpg_mssr_priv;
/**
* struct mstp_clock - MSTP gating clock
@@ -162,27 +198,40 @@
enable ? "ON" : "OFF");
spin_lock_irqsave(&priv->rmw_lock, flags);
- value = readl(priv->base + SMSTPCR(reg));
- if (enable)
- value &= ~bitmask;
- else
- value |= bitmask;
- writel(value, priv->base + SMSTPCR(reg));
+ if (priv->reg_layout == CLK_REG_LAYOUT_RZ_A) {
+ value = readb(priv->base + priv->control_regs[reg]);
+ if (enable)
+ value &= ~bitmask;
+ else
+ value |= bitmask;
+ writeb(value, priv->base + priv->control_regs[reg]);
+
+ /* dummy read to ensure write has completed */
+ readb(priv->base + priv->control_regs[reg]);
+ barrier_data(priv->base + priv->control_regs[reg]);
+ } else {
+ value = readl(priv->base + priv->control_regs[reg]);
+ if (enable)
+ value &= ~bitmask;
+ else
+ value |= bitmask;
+ writel(value, priv->base + priv->control_regs[reg]);
+ }
spin_unlock_irqrestore(&priv->rmw_lock, flags);
- if (!enable)
+ if (!enable || priv->reg_layout == CLK_REG_LAYOUT_RZ_A)
return 0;
for (i = 1000; i > 0; --i) {
- if (!(readl(priv->base + MSTPSR(reg)) & bitmask))
+ if (!(readl(priv->base + priv->status_regs[reg]) & bitmask))
break;
cpu_relax();
}
if (!i) {
dev_err(dev, "Failed to enable SMSTP %p[%d]\n",
- priv->base + SMSTPCR(reg), bit);
+ priv->base + priv->control_regs[reg], bit);
return -ETIMEDOUT;
}
@@ -205,7 +254,10 @@
struct cpg_mssr_priv *priv = clock->priv;
u32 value;
- value = readl(priv->base + MSTPSR(clock->index / 32));
+ if (priv->reg_layout == CLK_REG_LAYOUT_RZ_A)
+ value = readb(priv->base + priv->control_regs[clock->index / 32]);
+ else
+ value = readl(priv->base + priv->status_regs[clock->index / 32]);
return !(value & BIT(clock->index % 32));
}
@@ -226,6 +278,7 @@
unsigned int idx;
const char *type;
struct clk *clk;
+ int range_check;
switch (clkspec->args[0]) {
case CPG_CORE:
@@ -240,8 +293,14 @@
case CPG_MOD:
type = "module";
- idx = MOD_CLK_PACK(clkidx);
- if (clkidx % 100 > 31 || idx >= priv->num_mod_clks) {
+ if (priv->reg_layout == CLK_REG_LAYOUT_RZ_A) {
+ idx = MOD_CLK_PACK_10(clkidx);
+ range_check = 7 - (clkidx % 10);
+ } else {
+ idx = MOD_CLK_PACK(clkidx);
+ range_check = 31 - (clkidx % 100);
+ }
+ if (range_check < 0 || idx >= priv->num_mod_clks) {
dev_err(dev, "Invalid %s clock index %u\n", type,
clkidx);
return ERR_PTR(-EINVAL);
@@ -283,7 +342,7 @@
switch (core->type) {
case CLK_TYPE_IN:
- clk = of_clk_get_by_name(priv->dev->of_node, core->name);
+ clk = of_clk_get_by_name(priv->np, core->name);
break;
case CLK_TYPE_FF:
@@ -311,6 +370,11 @@
parent_name, 0,
core->mult, div);
}
+ break;
+
+ case CLK_TYPE_FR:
+ clk = clk_register_fixed_rate(NULL, core->name, NULL, 0,
+ core->mult);
break;
default:
@@ -343,7 +407,7 @@
struct mstp_clock *clock = NULL;
struct device *dev = priv->dev;
unsigned int id = mod->id;
- struct clk_init_data init = {};
+ struct clk_init_data init;
struct clk *parent, *clk;
const char *parent_name;
unsigned int i;
@@ -372,15 +436,7 @@
init.name = mod->name;
init.ops = &cpg_mstp_clock_ops;
- init.flags = CLK_IS_BASIC | CLK_SET_RATE_PARENT;
- for (i = 0; i < info->num_crit_mod_clks; i++)
- if (id == info->crit_mod_clks[i]) {
- dev_dbg(dev, "MSTP %s setting CLK_IS_CRITICAL\n",
- mod->name);
- init.flags |= CLK_IS_CRITICAL;
- break;
- }
-
+ init.flags = CLK_SET_RATE_PARENT;
parent_name = __clk_get_name(parent);
init.parent_names = &parent_name;
init.num_parents = 1;
@@ -388,6 +444,15 @@
clock->index = id - priv->num_core_clks;
clock->priv = priv;
clock->hw.init = &init;
+
+ for (i = 0; i < info->num_crit_mod_clks; i++)
+ if (id == info->crit_mod_clks[i] &&
+ cpg_mstp_clock_is_enabled(&clock->hw)) {
+ dev_dbg(dev, "MSTP %s setting CLK_IS_CRITICAL\n",
+ mod->name);
+ init.flags |= CLK_IS_CRITICAL;
+ break;
+ }
clk = clk_register(NULL, &clock->hw);
if (IS_ERR(clk))
@@ -406,9 +471,8 @@
struct cpg_mssr_clk_domain {
struct generic_pm_domain genpd;
- struct device_node *np;
unsigned int num_core_pm_clks;
- unsigned int core_pm_clks[0];
+ unsigned int core_pm_clks[];
};
static struct cpg_mssr_clk_domain *cpg_mssr_clk_domain;
@@ -418,7 +482,7 @@
{
unsigned int i;
- if (clkspec->np != pd->np || clkspec->args_count != 2)
+ if (clkspec->np != pd->genpd.dev.of_node || clkspec->args_count != 2)
return false;
switch (clkspec->args[0]) {
@@ -469,16 +533,12 @@
return PTR_ERR(clk);
error = pm_clk_create(dev);
- if (error) {
- dev_err(dev, "pm_clk_create failed %d\n", error);
+ if (error)
goto fail_put;
- }
error = pm_clk_add_clk(dev, clk);
- if (error) {
- dev_err(dev, "pm_clk_add_clk %pC failed %d\n", clk, error);
+ if (error)
goto fail_destroy;
- }
return 0;
@@ -508,7 +568,6 @@
if (!pd)
return -ENOMEM;
- pd->np = np;
pd->num_core_pm_clks = num_core_pm_clks;
memcpy(pd->core_pm_clks, core_pm_clks, pm_size);
@@ -540,13 +599,13 @@
dev_dbg(priv->dev, "reset %u%02u\n", reg, bit);
/* Reset module */
- writel(bitmask, priv->base + SRCR(reg));
+ writel(bitmask, priv->base + priv->reset_regs[reg]);
/* Wait for at least one cycle of the RCLK clock (@ ca. 32 kHz) */
udelay(35);
/* Release module from reset state */
- writel(bitmask, priv->base + SRSTCLR(reg));
+ writel(bitmask, priv->base + priv->reset_clear_regs[reg]);
return 0;
}
@@ -560,7 +619,7 @@
dev_dbg(priv->dev, "assert %u%02u\n", reg, bit);
- writel(bitmask, priv->base + SRCR(reg));
+ writel(bitmask, priv->base + priv->reset_regs[reg]);
return 0;
}
@@ -574,7 +633,7 @@
dev_dbg(priv->dev, "deassert %u%02u\n", reg, bit);
- writel(bitmask, priv->base + SRSTCLR(reg));
+ writel(bitmask, priv->base + priv->reset_clear_regs[reg]);
return 0;
}
@@ -586,7 +645,7 @@
unsigned int bit = id % 32;
u32 bitmask = BIT(bit);
- return !!(readl(priv->base + SRCR(reg)) & bitmask);
+ return !!(readl(priv->base + priv->reset_regs[reg]) & bitmask);
}
static const struct reset_control_ops cpg_mssr_reset_ops = {
@@ -630,9 +689,26 @@
static const struct of_device_id cpg_mssr_match[] = {
+#ifdef CONFIG_CLK_R7S9210
+ {
+ .compatible = "renesas,r7s9210-cpg-mssr",
+ .data = &r7s9210_cpg_mssr_info,
+ },
+#endif
+#ifdef CONFIG_CLK_R8A7742
+ {
+ .compatible = "renesas,r8a7742-cpg-mssr",
+ .data = &r8a7742_cpg_mssr_info,
+ },
+#endif
#ifdef CONFIG_CLK_R8A7743
{
.compatible = "renesas,r8a7743-cpg-mssr",
+ .data = &r8a7743_cpg_mssr_info,
+ },
+ /* RZ/G1N is (almost) identical to RZ/G1M w.r.t. clocks. */
+ {
+ .compatible = "renesas,r8a7744-cpg-mssr",
.data = &r8a7743_cpg_mssr_info,
},
#endif
@@ -646,6 +722,30 @@
{
.compatible = "renesas,r8a77470-cpg-mssr",
.data = &r8a77470_cpg_mssr_info,
+ },
+#endif
+#ifdef CONFIG_CLK_R8A774A1
+ {
+ .compatible = "renesas,r8a774a1-cpg-mssr",
+ .data = &r8a774a1_cpg_mssr_info,
+ },
+#endif
+#ifdef CONFIG_CLK_R8A774B1
+ {
+ .compatible = "renesas,r8a774b1-cpg-mssr",
+ .data = &r8a774b1_cpg_mssr_info,
+ },
+#endif
+#ifdef CONFIG_CLK_R8A774C0
+ {
+ .compatible = "renesas,r8a774c0-cpg-mssr",
+ .data = &r8a774c0_cpg_mssr_info,
+ },
+#endif
+#ifdef CONFIG_CLK_R8A774E1
+ {
+ .compatible = "renesas,r8a774e1-cpg-mssr",
+ .data = &r8a774e1_cpg_mssr_info,
},
#endif
#ifdef CONFIG_CLK_R8A7790
@@ -683,9 +783,15 @@
.data = &r8a7795_cpg_mssr_info,
},
#endif
-#ifdef CONFIG_CLK_R8A7796
+#ifdef CONFIG_CLK_R8A77960
{
.compatible = "renesas,r8a7796-cpg-mssr",
+ .data = &r8a7796_cpg_mssr_info,
+ },
+#endif
+#ifdef CONFIG_CLK_R8A77961
+ {
+ .compatible = "renesas,r8a77961-cpg-mssr",
.data = &r8a7796_cpg_mssr_info,
},
#endif
@@ -719,6 +825,12 @@
.data = &r8a77995_cpg_mssr_info,
},
#endif
+#ifdef CONFIG_CLK_R8A779A0
+ {
+ .compatible = "renesas,r8a779a0-cpg-mssr",
+ .data = &r8a779a0_cpg_mssr_info,
+ },
+#endif
{ /* sentinel */ }
};
@@ -741,7 +853,9 @@
for (reg = 0; reg < ARRAY_SIZE(priv->smstpcr_saved); reg++) {
if (priv->smstpcr_saved[reg].mask)
priv->smstpcr_saved[reg].val =
- readl(priv->base + SMSTPCR(reg));
+ priv->reg_layout == CLK_REG_LAYOUT_RZ_A ?
+ readb(priv->base + priv->control_regs[reg]) :
+ readl(priv->base + priv->control_regs[reg]);
}
/* Save core clocks */
@@ -769,13 +883,23 @@
if (!mask)
continue;
- oldval = readl(priv->base + SMSTPCR(reg));
+ if (priv->reg_layout == CLK_REG_LAYOUT_RZ_A)
+ oldval = readb(priv->base + priv->control_regs[reg]);
+ else
+ oldval = readl(priv->base + priv->control_regs[reg]);
newval = oldval & ~mask;
newval |= priv->smstpcr_saved[reg].val & mask;
if (newval == oldval)
continue;
- writel(newval, priv->base + SMSTPCR(reg));
+ if (priv->reg_layout == CLK_REG_LAYOUT_RZ_A) {
+ writeb(newval, priv->base + priv->control_regs[reg]);
+ /* dummy read to ensure write has completed */
+ readb(priv->base + priv->control_regs[reg]);
+ barrier_data(priv->base + priv->control_regs[reg]);
+ continue;
+ } else
+ writel(newval, priv->base + priv->control_regs[reg]);
/* Wait until enabled clocks are really enabled */
mask &= ~priv->smstpcr_saved[reg].val;
@@ -783,15 +907,15 @@
continue;
for (i = 1000; i > 0; --i) {
- oldval = readl(priv->base + MSTPSR(reg));
+ oldval = readl(priv->base + priv->status_regs[reg]);
if (!(oldval & mask))
break;
cpu_relax();
}
if (!i)
- dev_warn(dev, "Failed to enable SMSTP %p[0x%x]\n",
- priv->base + SMSTPCR(reg), oldval & mask);
+ dev_warn(dev, "Failed to enable SMSTP%u[0x%x]\n", reg,
+ oldval & mask);
}
return 0;
@@ -806,60 +930,122 @@
#define DEV_PM_OPS NULL
#endif /* CONFIG_PM_SLEEP && CONFIG_ARM_PSCI_FW */
-static int __init cpg_mssr_probe(struct platform_device *pdev)
+static int __init cpg_mssr_common_init(struct device *dev,
+ struct device_node *np,
+ const struct cpg_mssr_info *info)
{
- struct device *dev = &pdev->dev;
- struct device_node *np = dev->of_node;
- const struct cpg_mssr_info *info;
struct cpg_mssr_priv *priv;
unsigned int nclks, i;
- struct resource *res;
- struct clk **clks;
int error;
- info = of_device_get_match_data(dev);
if (info->init) {
error = info->init(dev);
if (error)
return error;
}
- priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ nclks = info->num_total_core_clks + info->num_hw_mod_clks;
+ priv = kzalloc(struct_size(priv, clks, nclks), GFP_KERNEL);
if (!priv)
return -ENOMEM;
+ priv->np = np;
priv->dev = dev;
spin_lock_init(&priv->rmw_lock);
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- priv->base = devm_ioremap_resource(dev, res);
- if (IS_ERR(priv->base))
- return PTR_ERR(priv->base);
+ priv->base = of_iomap(np, 0);
+ if (!priv->base) {
+ error = -ENOMEM;
+ goto out_err;
+ }
- nclks = info->num_total_core_clks + info->num_hw_mod_clks;
- clks = devm_kmalloc_array(dev, nclks, sizeof(*clks), GFP_KERNEL);
- if (!clks)
- return -ENOMEM;
-
- dev_set_drvdata(dev, priv);
- priv->clks = clks;
priv->num_core_clks = info->num_total_core_clks;
priv->num_mod_clks = info->num_hw_mod_clks;
priv->last_dt_core_clk = info->last_dt_core_clk;
RAW_INIT_NOTIFIER_HEAD(&priv->notifiers);
+ priv->reg_layout = info->reg_layout;
+ if (priv->reg_layout == CLK_REG_LAYOUT_RCAR_GEN2_AND_GEN3) {
+ priv->status_regs = mstpsr;
+ priv->control_regs = smstpcr;
+ priv->reset_regs = srcr;
+ priv->reset_clear_regs = srstclr;
+ } else if (priv->reg_layout == CLK_REG_LAYOUT_RZ_A) {
+ priv->control_regs = stbcr;
+ } else if (priv->reg_layout == CLK_REG_LAYOUT_RCAR_V3U) {
+ priv->status_regs = mstpsr_for_v3u;
+ priv->control_regs = mstpcr_for_v3u;
+ priv->reset_regs = srcr_for_v3u;
+ priv->reset_clear_regs = srstclr_for_v3u;
+ } else {
+ error = -EINVAL;
+ goto out_err;
+ }
for (i = 0; i < nclks; i++)
- clks[i] = ERR_PTR(-ENOENT);
+ priv->clks[i] = ERR_PTR(-ENOENT);
+
+ error = of_clk_add_provider(np, cpg_mssr_clk_src_twocell_get, priv);
+ if (error)
+ goto out_err;
+
+ cpg_mssr_priv = priv;
+
+ return 0;
+
+out_err:
+ if (priv->base)
+ iounmap(priv->base);
+ kfree(priv);
+
+ return error;
+}
+
+void __init cpg_mssr_early_init(struct device_node *np,
+ const struct cpg_mssr_info *info)
+{
+ int error;
+ int i;
+
+ error = cpg_mssr_common_init(NULL, np, info);
+ if (error)
+ return;
+
+ for (i = 0; i < info->num_early_core_clks; i++)
+ cpg_mssr_register_core_clk(&info->early_core_clks[i], info,
+ cpg_mssr_priv);
+
+ for (i = 0; i < info->num_early_mod_clks; i++)
+ cpg_mssr_register_mod_clk(&info->early_mod_clks[i], info,
+ cpg_mssr_priv);
+
+}
+
+static int __init cpg_mssr_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+ const struct cpg_mssr_info *info;
+ struct cpg_mssr_priv *priv;
+ unsigned int i;
+ int error;
+
+ info = of_device_get_match_data(dev);
+
+ if (!cpg_mssr_priv) {
+ error = cpg_mssr_common_init(dev, dev->of_node, info);
+ if (error)
+ return error;
+ }
+
+ priv = cpg_mssr_priv;
+ priv->dev = dev;
+ dev_set_drvdata(dev, priv);
for (i = 0; i < info->num_core_clks; i++)
cpg_mssr_register_core_clk(&info->core_clks[i], info, priv);
for (i = 0; i < info->num_mod_clks; i++)
cpg_mssr_register_mod_clk(&info->mod_clks[i], info, priv);
-
- error = of_clk_add_provider(np, cpg_mssr_clk_src_twocell_get, priv);
- if (error)
- return error;
error = devm_add_action_or_reset(dev,
cpg_mssr_del_clk_provider,
@@ -872,6 +1058,10 @@
if (error)
return error;
+ /* Reset Controller not supported for Standby Control SoCs */
+ if (priv->reg_layout == CLK_REG_LAYOUT_RZ_A)
+ return 0;
+
error = cpg_mssr_reset_controller_register(priv);
if (error)
return error;
--
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