* [PATCH v5 4/5] clk: shmobile: Add new CPG/MSSR driver core
2015-10-29 11:20 [PATCH v5 0/5] clk: shmobile: Add new CPG/MSSR driver Geert Uytterhoeven
` (2 preceding siblings ...)
2015-10-29 11:21 ` [PATCH v5 3/5] clk: shmobile: div6: Extract cpg_div6_register() Geert Uytterhoeven
@ 2015-10-29 11:21 ` Geert Uytterhoeven
2015-10-29 11:21 ` [PATCH v5 5/5] clk: shmobile: r8a7795: Add new CPG/MSSR driver Geert Uytterhoeven
4 siblings, 0 replies; 10+ messages in thread
From: Geert Uytterhoeven @ 2015-10-29 11:21 UTC (permalink / raw)
To: Michael Turquette, Stephen Boyd, Magnus Damm, Simon Horman,
Laurent Pinchart
Cc: linux-clk, linux-sh, linux-kernel, Geert Uytterhoeven
Add the common core for the new Renesas Clock Pulse Generator / Module
Standby and Software Reset driver.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
v5:
- Convert from CLK_OF_DECLARE() to a real platform_driver, initialized
using platform_driver_probe() from subsys_initcall().
Note that arch_initcall() would be OK for arm32, but not for arm64:
- arm32 calls of_platform_populate() from arch_initcall(),
- arm64 calls of_platform_populate() from arch_initcall_sync().
- Implement handling of core clocks that are suitable for power
management (not needed for R-Car, but useful for SH-Mobile AG5 and
R-Mobile APE6),
- Add cpg_mssr_info.init(), as initialization is now done from the
core driver,
- Move conversion from Module Clock numbers to IDs from run time (C
code) to compile time (CPP macros for filling in tables),
- Unify some code to handle CLK_TYPE_IN and CLK_TYPE_FF,
- Rename from clk-cpg-mssr to renesas-cpg-mssr,
- Add include guards to clk-cpg-mssr.h,
- Improve struct documentation,
- Clean up debugging code,
- Drop RFC state,
v4:
- New.
---
drivers/clk/shmobile/renesas-cpg-mssr.c | 587 ++++++++++++++++++++++++++++++++
drivers/clk/shmobile/renesas-cpg-mssr.h | 131 +++++++
2 files changed, 718 insertions(+)
create mode 100644 drivers/clk/shmobile/renesas-cpg-mssr.c
create mode 100644 drivers/clk/shmobile/renesas-cpg-mssr.h
diff --git a/drivers/clk/shmobile/renesas-cpg-mssr.c b/drivers/clk/shmobile/renesas-cpg-mssr.c
new file mode 100644
index 0000000000000000..e4382ba4e1e31aca
--- /dev/null
+++ b/drivers/clk/shmobile/renesas-cpg-mssr.c
@@ -0,0 +1,587 @@
+/*
+ * Renesas Clock Pulse Generator / Module Standby and Software Reset
+ *
+ * Copyright (C) 2015 Glider bvba
+ *
+ * Based on clk-mstp.c, clk-rcar-gen2.c, and clk-rcar-gen3.c
+ *
+ * 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>
+#include <linux/clk-provider.h>
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/pm_clock.h>
+#include <linux/pm_domain.h>
+#include <linux/slab.h>
+
+#include <dt-bindings/clock/renesas-cpg-mssr.h>
+
+#include "renesas-cpg-mssr.h"
+#include "clk-div6.h"
+
+#ifdef DEBUG
+#define WARN_DEBUG(x) do { } while (0)
+#else
+#define WARN_DEBUG(x) WARN_ON(x)
+#endif
+
+
+/*
+ * Module Standby and Software Reset register offets.
+ *
+ * If the registers exist, these are valid for SH-Mobile, R-Mobile,
+ * R-Car Gen 2, and R-Car Gen 3.
+ * These are NOT valid for R-Car Gen1 and RZ/A1!
+ */
+
+/*
+ * Module Stop Status Register offsets
+ */
+
+static const u16 mstpsr[] = {
+ 0x030, 0x038, 0x040, 0x048, 0x04C, 0x03C, 0x1C0, 0x1C4,
+ 0x9A0, 0x9A4, 0x9A8, 0x9AC,
+};
+
+#define MSTPSR(i) mstpsr[i]
+
+
+/*
+ * System Module Stop Control Register offsets
+ */
+
+static const u16 smstpcr[] = {
+ 0x130, 0x134, 0x138, 0x13C, 0x140, 0x144, 0x148, 0x14C,
+ 0x990, 0x994, 0x998, 0x99C,
+};
+
+#define SMSTPCR(i) smstpcr[i]
+
+
+/*
+ * Software Reset Register offsets
+ */
+
+static const u16 srcr[] = {
+ 0x0A0, 0x0A8, 0x0B0, 0x0B8, 0x0BC, 0x0C4, 0x1C8, 0x1CC,
+ 0x920, 0x924, 0x928, 0x92C,
+};
+
+#define SRCR(i) srcr[i]
+
+
+/* Realtime Module Stop Control Register offsets */
+#define RMSTPCR(i) (smstpcr[i] - 0x20)
+
+/* Modem Module Stop Control Register offsets (r8a73a4) */
+#define MMSTPCR(i) (smstpcr[i] + 0x20)
+
+/* Software Reset Clearing Register offsets */
+#define SRSTCLR(i) (0x940 + (i) * 4)
+
+
+/**
+ * Clock Pulse Generator / Module Standby and Software Reset Private Data
+ *
+ * @dev: CPG/MSSR device
+ * @base: CPG/MSSR register block base address
+ * @mstp_lock: protects writes to SMSTPCR
+ * @clks: Array containing all Core and Module Clocks
+ * @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
+ */
+struct cpg_mssr_priv {
+ struct device *dev;
+ void __iomem *base;
+ spinlock_t mstp_lock;
+
+ struct clk **clks;
+ unsigned int num_core_clks;
+ unsigned int num_mod_clks;
+ unsigned int last_dt_core_clk;
+};
+
+
+/**
+ * struct mstp_clock - MSTP gating clock
+ * @hw: handle between common and hardware-specific interfaces
+ * @index: MSTP clock number
+ * @priv: CPG/MSSR private data
+ */
+struct mstp_clock {
+ struct clk_hw hw;
+ u32 index;
+ struct cpg_mssr_priv *priv;
+};
+
+#define to_mstp_clock(_hw) container_of(_hw, struct mstp_clock, hw)
+
+static int cpg_mstp_clock_endisable(struct clk_hw *hw, bool enable)
+{
+ struct mstp_clock *clock = to_mstp_clock(hw);
+ struct cpg_mssr_priv *priv = clock->priv;
+ unsigned int reg = clock->index / 32;
+ unsigned int bit = clock->index % 32;
+ struct device *dev = priv->dev;
+ u32 bitmask = BIT(bit);
+ unsigned long flags;
+ unsigned int i;
+ u32 value;
+
+ dev_dbg(dev, "MSTP %u%02u/%pC %s\n", reg, bit, hw->clk,
+ enable ? "ON" : "OFF");
+ spin_lock_irqsave(&priv->mstp_lock, flags);
+
+ value = clk_readl(priv->base + SMSTPCR(reg));
+ if (enable)
+ value &= ~bitmask;
+ else
+ value |= bitmask;
+ clk_writel(value, priv->base + SMSTPCR(reg));
+
+ spin_unlock_irqrestore(&priv->mstp_lock, flags);
+
+ if (!enable)
+ return 0;
+
+ for (i = 1000; i > 0; --i) {
+ if (!(clk_readl(priv->base + MSTPSR(reg)) &
+ bitmask))
+ break;
+ cpu_relax();
+ }
+
+ if (!i) {
+ dev_err(dev, "Failed to enable SMSTP %p[%d]\n",
+ priv->base + SMSTPCR(reg), bit);
+ return -ETIMEDOUT;
+ }
+
+ return 0;
+}
+
+static int cpg_mstp_clock_enable(struct clk_hw *hw)
+{
+ return cpg_mstp_clock_endisable(hw, true);
+}
+
+static void cpg_mstp_clock_disable(struct clk_hw *hw)
+{
+ cpg_mstp_clock_endisable(hw, false);
+}
+
+static int cpg_mstp_clock_is_enabled(struct clk_hw *hw)
+{
+ struct mstp_clock *clock = to_mstp_clock(hw);
+ struct cpg_mssr_priv *priv = clock->priv;
+ u32 value;
+
+ value = clk_readl(priv->base + MSTPSR(clock->index / 32));
+
+ return !(value & BIT(clock->index % 32));
+}
+
+static const struct clk_ops cpg_mstp_clock_ops = {
+ .enable = cpg_mstp_clock_enable,
+ .disable = cpg_mstp_clock_disable,
+ .is_enabled = cpg_mstp_clock_is_enabled,
+};
+
+static
+struct clk *cpg_mssr_clk_src_twocell_get(struct of_phandle_args *clkspec,
+ void *data)
+{
+ unsigned int clkidx = clkspec->args[1];
+ struct cpg_mssr_priv *priv = data;
+ struct device *dev = priv->dev;
+ unsigned int idx;
+ const char *type;
+ struct clk *clk;
+
+ switch (clkspec->args[0]) {
+ case CPG_CORE:
+ type = "core";
+ if (clkidx > priv->last_dt_core_clk) {
+ dev_err(dev, "Invalid %s clock index %u\n", type,
+ clkidx);
+ return ERR_PTR(-EINVAL);
+ }
+ clk = priv->clks[clkidx];
+ break;
+
+ case CPG_MOD:
+ type = "module";
+ idx = MOD_CLK_PACK(clkidx);
+ if (clkidx % 100 > 31 || idx >= priv->num_mod_clks) {
+ dev_err(dev, "Invalid %s clock index %u\n", type,
+ clkidx);
+ return ERR_PTR(-EINVAL);
+ }
+ clk = priv->clks[priv->num_core_clks + idx];
+ break;
+
+ default:
+ dev_err(dev, "Invalid CPG clock type %u\n", clkspec->args[0]);
+ return ERR_PTR(-EINVAL);
+ }
+
+ if (IS_ERR(clk))
+ dev_err(dev, "Cannot get %s clock %u: %ld", type, clkidx,
+ PTR_ERR(clk));
+ else
+ dev_dbg(dev, "clock (%u, %u) is %pC at %pCr Hz\n",
+ clkspec->args[0], clkspec->args[1], clk, clk);
+ return clk;
+}
+
+static void __init cpg_mssr_register_core_clk(const struct cpg_core_clk *core,
+ const struct cpg_mssr_info *info,
+ struct cpg_mssr_priv *priv)
+{
+ struct clk *clk = NULL, *parent;
+ struct device *dev = priv->dev;
+ unsigned int id = core->id;
+ const char *parent_name;
+
+ WARN_DEBUG(id >= priv->num_core_clks);
+ WARN_DEBUG(PTR_ERR(priv->clks[id]) != -ENOENT);
+
+ switch (core->type) {
+ case CLK_TYPE_IN:
+ clk = of_clk_get_by_name(priv->dev->of_node, core->name);
+ break;
+
+ case CLK_TYPE_FF:
+ case CLK_TYPE_DIV6P1:
+ WARN_DEBUG(core->parent >= priv->num_core_clks);
+ parent = priv->clks[core->parent];
+ if (IS_ERR(parent)) {
+ clk = parent;
+ goto fail;
+ }
+
+ parent_name = __clk_get_name(parent);
+ if (core->type = CLK_TYPE_FF) {
+ clk = clk_register_fixed_factor(NULL, core->name,
+ parent_name, 0,
+ core->mult, core->div);
+ } else {
+ clk = cpg_div6_register(core->name, 1, &parent_name,
+ priv->base + core->offset);
+ }
+ break;
+
+ default:
+ if (info->cpg_clk_register)
+ clk = info->cpg_clk_register(dev, core, info,
+ priv->clks, priv->base);
+ else
+ dev_err(dev, "%s has unsupported core clock type %u\n",
+ core->name, core->type);
+ break;
+ }
+
+ if (IS_ERR_OR_NULL(clk))
+ goto fail;
+
+ dev_dbg(dev, "Core clock %pC at %pCr Hz\n", clk, clk);
+ priv->clks[id] = clk;
+ return;
+
+fail:
+ dev_err(dev, "Failed to register %s clock %s: %ld\n", "core,",
+ core->name, PTR_ERR(clk));
+}
+
+static void __init cpg_mssr_register_mod_clk(const struct mssr_mod_clk *mod,
+ const struct cpg_mssr_info *info,
+ struct cpg_mssr_priv *priv)
+{
+ struct mstp_clock *clock = NULL;
+ struct device *dev = priv->dev;
+ unsigned int id = mod->id;
+ struct clk_init_data init;
+ struct clk *parent, *clk;
+ const char *parent_name;
+ unsigned int i;
+
+ WARN_DEBUG(id < priv->num_core_clks);
+ WARN_DEBUG(id >= priv->num_core_clks + priv->num_mod_clks);
+ WARN_DEBUG(mod->parent >= priv->num_core_clks + priv->num_mod_clks);
+ WARN_DEBUG(PTR_ERR(priv->clks[id]) != -ENOENT);
+
+ parent = priv->clks[mod->parent];
+ if (IS_ERR(parent)) {
+ clk = parent;
+ goto fail;
+ }
+
+ clock = kzalloc(sizeof(*clock), GFP_KERNEL);
+ if (!clock) {
+ clk = ERR_PTR(-ENOMEM);
+ goto fail;
+ }
+
+ 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]) {
+#ifdef CLK_ENABLE_HAND_OFF
+ dev_dbg(dev, "MSTP %s setting CLK_ENABLE_HAND_OFF\n",
+ mod->name);
+ init.flags |= CLK_ENABLE_HAND_OFF;
+ break;
+#else
+ dev_dbg(dev, "Ignoring MSTP %s to prevent disabling\n",
+ mod->name);
+ return;
+#endif
+ }
+
+ parent_name = __clk_get_name(parent);
+ init.parent_names = &parent_name;
+ init.num_parents = 1;
+
+ clock->index = id - priv->num_core_clks;
+ clock->priv = priv;
+ clock->hw.init = &init;
+
+ clk = clk_register(NULL, &clock->hw);
+ if (IS_ERR(clk))
+ goto fail;
+
+ dev_dbg(dev, "Module clock %pC at %pCr Hz\n", clk, clk);
+ priv->clks[id] = clk;
+ return;
+
+fail:
+ dev_err(dev, "Failed to register %s clock %s: %ld\n", "module,",
+ mod->name, PTR_ERR(clk));
+ kfree(clock);
+}
+
+
+#ifdef CONFIG_PM_GENERIC_DOMAINS_OF
+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];
+};
+
+static bool cpg_mssr_is_pm_clk(const struct of_phandle_args *clkspec,
+ struct cpg_mssr_clk_domain *pd)
+{
+ unsigned int i;
+
+ if (clkspec->np != pd->np || clkspec->args_count != 2)
+ return false;
+
+ switch (clkspec->args[0]) {
+ case CPG_CORE:
+ for (i = 0; i < pd->num_core_pm_clks; i++)
+ if (clkspec->args[1] = pd->core_pm_clks[i])
+ return true;
+ return false;
+
+ case CPG_MOD:
+ return true;
+
+ default:
+ return false;
+ }
+}
+
+static int cpg_mssr_attach_dev(struct generic_pm_domain *genpd,
+ struct device *dev)
+{
+ struct cpg_mssr_clk_domain *pd + container_of(genpd, struct cpg_mssr_clk_domain, genpd);
+ struct device_node *np = dev->of_node;
+ struct of_phandle_args clkspec;
+ struct clk *clk;
+ int i = 0;
+ int error;
+
+ while (!of_parse_phandle_with_args(np, "clocks", "#clock-cells", i,
+ &clkspec)) {
+ if (cpg_mssr_is_pm_clk(&clkspec, pd))
+ goto found;
+
+ of_node_put(clkspec.np);
+ i++;
+ }
+
+ return 0;
+
+found:
+ clk = of_clk_get_from_provider(&clkspec);
+ of_node_put(clkspec.np);
+
+ if (IS_ERR(clk))
+ return PTR_ERR(clk);
+
+ error = pm_clk_create(dev);
+ if (error) {
+ dev_err(dev, "pm_clk_create failed %d\n", 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);
+ goto fail_destroy;
+ }
+
+ return 0;
+
+fail_destroy:
+ pm_clk_destroy(dev);
+fail_put:
+ clk_put(clk);
+ return error;
+}
+
+static void cpg_mssr_detach_dev(struct generic_pm_domain *genpd,
+ struct device *dev)
+{
+ if (!list_empty(&dev->power.subsys_data->clock_list))
+ pm_clk_destroy(dev);
+}
+
+static int __init cpg_mssr_add_clk_domain(struct device *dev,
+ const unsigned int *core_pm_clks,
+ unsigned int num_core_pm_clks)
+{
+ struct device_node *np = dev->of_node;
+ struct generic_pm_domain *genpd;
+ struct cpg_mssr_clk_domain *pd;
+ size_t pm_size = num_core_pm_clks * sizeof(core_pm_clks[0]);
+
+ pd = devm_kzalloc(dev, sizeof(*pd) + pm_size, GFP_KERNEL);
+ 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);
+
+ genpd = &pd->genpd;
+ genpd->name = np->name;
+ genpd->flags = GENPD_FLAG_PM_CLK;
+ pm_genpd_init(genpd, &simple_qos_governor, false);
+ genpd->attach_dev = cpg_mssr_attach_dev;
+ genpd->detach_dev = cpg_mssr_detach_dev;
+
+ of_genpd_add_provider_simple(np, genpd);
+ return 0;
+}
+#else
+static inline int cpg_mssr_add_clk_domain(struct device *dev,
+ const unsigned int *core_pm_clks,
+ unsigned int num_core_pm_clks) {}
+#endif /* !CONFIG_PM_GENERIC_DOMAINS_OF */
+
+
+static const struct of_device_id cpg_mssr_match[] = {
+ { /* sentinel */ }
+};
+
+static void cpg_mssr_del_clk_provider(void *data)
+{
+ of_clk_del_provider(data);
+}
+
+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 nclks, i;
+ struct resource *res;
+ struct clk **clks;
+ int error;
+
+ info = of_match_node(cpg_mssr_match, np)->data;
+ if (info->init) {
+ error = info->init(dev);
+ if (error)
+ return error;
+ }
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->dev = dev;
+ spin_lock_init(&priv->mstp_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);
+
+ 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;
+
+ 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;
+
+ for (i = 0; i < nclks; i++)
+ clks[i] = ERR_PTR(-ENOENT);
+
+ 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;
+
+ devm_add_action(dev, cpg_mssr_del_clk_provider, np);
+
+ error = cpg_mssr_add_clk_domain(dev, info->core_pm_clks,
+ info->num_core_pm_clks);
+ if (error)
+ return error;
+
+ return 0;
+}
+
+static struct platform_driver cpg_mssr_driver = {
+ .driver = {
+ .name = "renesas-cpg-mssr",
+ .of_match_table = cpg_mssr_match,
+ },
+};
+
+static int __init cpg_mssr_init(void)
+{
+ return platform_driver_probe(&cpg_mssr_driver, cpg_mssr_probe);
+}
+
+subsys_initcall(cpg_mssr_init);
+
+MODULE_DESCRIPTION("Renesas CPG/MSSR Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/clk/shmobile/renesas-cpg-mssr.h b/drivers/clk/shmobile/renesas-cpg-mssr.h
new file mode 100644
index 0000000000000000..e6d24875b56f7755
--- /dev/null
+++ b/drivers/clk/shmobile/renesas-cpg-mssr.h
@@ -0,0 +1,131 @@
+/*
+ * Renesas Clock Pulse Generator / Module Standby and Software Reset
+ *
+ * Copyright (C) 2015 Glider bvba
+ *
+ * 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.
+ */
+
+#ifndef __CLK_RENESAS_CPG_MSSR_H__
+#define __CLK_RENESAS_CPG_MSSR_H__
+
+ /*
+ * Definitions of CPG Core Clocks
+ *
+ * These include:
+ * - Clock outputs exported to DT
+ * - External input clocks
+ * - Internal CPG clocks
+ */
+
+struct cpg_core_clk {
+ /* Common */
+ const char *name;
+ unsigned int id;
+ unsigned int type;
+ /* Depending on type */
+ unsigned int parent; /* Core Clocks only */
+ unsigned int div;
+ unsigned int mult;
+ unsigned int offset;
+};
+
+enum clk_types {
+ /* Generic */
+ CLK_TYPE_IN, /* External Clock Input */
+ CLK_TYPE_FF, /* Fixed Factor Clock */
+ CLK_TYPE_DIV6P1, /* DIV6 Clock with 1 parent clock */
+
+ /* Custom definitions start here */
+ CLK_TYPE_CUSTOM,
+};
+
+#define DEF_TYPE(_name, _id, _type...) \
+ { .name = _name, .id = _id, .type = _type }
+#define DEF_BASE(_name, _id, _type, _parent...) \
+ DEF_TYPE(_name, _id, _type, .parent = _parent)
+
+#define DEF_INPUT(_name, _id) \
+ DEF_TYPE(_name, _id, CLK_TYPE_IN)
+#define DEF_FIXED(_name, _id, _parent, _div, _mult) \
+ DEF_BASE(_name, _id, CLK_TYPE_FF, _parent, .div = _div, .mult = _mult)
+#define DEF_DIV6P1(_name, _id, _parent, _offset) \
+ DEF_BASE(_name, _id, CLK_TYPE_DIV6P1, _parent, .offset = _offset)
+
+
+ /*
+ * Definitions of Module Clocks
+ */
+
+struct mssr_mod_clk {
+ const char *name;
+ unsigned int id;
+ unsigned int parent; /* Add MOD_CLK_BASE for Module Clocks */
+};
+
+/* Convert from sparse base-100 to packed index space */
+#define MOD_CLK_PACK(x) ((x) - ((x) / 100) * (100 - 32))
+
+#define MOD_CLK_ID(x) (MOD_CLK_BASE + MOD_CLK_PACK(x))
+
+#define DEF_MOD(_name, _mod, _parent...) \
+ { .name = _name, .id = MOD_CLK_ID(_mod), .parent = _parent }
+
+
+struct device_node;
+
+ /**
+ * SoC-specific CPG/MSSR Description
+ *
+ * @core_clks: Array of Core Clock definitions
+ * @num_core_clks: Number of entries in core_clks[]
+ * @last_dt_core_clk: ID of the last Core Clock exported to DT
+ * @num_total_core_clks: Total number of Core Clocks (exported + internal)
+ *
+ * @mod_clks: Array of Module Clock definitions
+ * @num_mod_clks: Number of entries in mod_clks[]
+ * @num_hw_mod_clks: Number of Module Clocks supported by the hardware
+ *
+ * @crit_mod_clks: Array with Module Clock IDs of critical clocks that
+ * should not be disabled without a knowledgeable driver
+ * @num_crit_mod_clks: Number of entries in crit_mod_clks[]
+ *
+ * @core_pm_clks: Array with IDs of Core Clocks that are suitable for Power
+ * Management, in addition to Module Clocks
+ * @num_core_pm_clks: Number of entries in core_pm_clks[]
+ *
+ * @init: Optional callback to perform SoC-specific initialization
+ * @cpg_clk_register: Optional callback to handle special Core Clock types
+ */
+
+struct cpg_mssr_info {
+ /* Core Clocks */
+ const struct cpg_core_clk *core_clks;
+ unsigned int num_core_clks;
+ unsigned int last_dt_core_clk;
+ unsigned int num_total_core_clks;
+
+ /* Module Clocks */
+ const struct mssr_mod_clk *mod_clks;
+ unsigned int num_mod_clks;
+ unsigned int num_hw_mod_clks;
+
+ /* Critical Module Clocks that should not be disabled */
+ const unsigned int *crit_mod_clks;
+ unsigned int num_crit_mod_clks;
+
+ /* Core Clocks suitable for PM, in addition to the Module Clocks */
+ const unsigned int *core_pm_clks;
+ unsigned int num_core_pm_clks;
+
+ /* Callbacks */
+ int (*init)(struct device *dev);
+ struct clk *(*cpg_clk_register)(struct device *dev,
+ const struct cpg_core_clk *core,
+ const struct cpg_mssr_info *info,
+ struct clk **clks, void __iomem *base);
+};
+
+#endif
--
1.9.1
^ permalink raw reply related [flat|nested] 10+ messages in thread* [PATCH v5 5/5] clk: shmobile: r8a7795: Add new CPG/MSSR driver
2015-10-29 11:20 [PATCH v5 0/5] clk: shmobile: Add new CPG/MSSR driver Geert Uytterhoeven
` (3 preceding siblings ...)
2015-10-29 11:21 ` [PATCH v5 4/5] clk: shmobile: Add new CPG/MSSR driver core Geert Uytterhoeven
@ 2015-10-29 11:21 ` Geert Uytterhoeven
2015-10-30 8:27 ` Geert Uytterhoeven
4 siblings, 1 reply; 10+ messages in thread
From: Geert Uytterhoeven @ 2015-10-29 11:21 UTC (permalink / raw)
To: Michael Turquette, Stephen Boyd, Magnus Damm, Simon Horman,
Laurent Pinchart
Cc: linux-clk, linux-sh, linux-kernel, Geert Uytterhoeven
Add a new R-Car H3 Clock Pulse Generator / Module Standby and Software
Reset driver, using the new CPG/MSSR driver core.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
v5:
- Convert to real platform_driver,
- Drop dependency on undocumented "renesas,modemr" property,
- Move conversion from Module Clock numbers to IDs from run time (C
code) to compile time (CPP macros for filling in tables),
- Rename driver from clk-r8a7795-cpg-mssr to r8a7795-cpg-mssr,
- Enter shmobile subdir if CONFIG_ARCH_RENESAS=y,
- Clean up debugging code,
- Drop RFC state,
v4:
- New.
---
drivers/clk/Makefile | 1 +
drivers/clk/shmobile/Makefile | 2 +
drivers/clk/shmobile/r8a7795-cpg-mssr.c | 373 ++++++++++++++++++++++++++++++++
drivers/clk/shmobile/renesas-cpg-mssr.c | 6 +
drivers/clk/shmobile/renesas-cpg-mssr.h | 1 +
5 files changed, 383 insertions(+)
create mode 100644 drivers/clk/shmobile/r8a7795-cpg-mssr.c
diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
index c4cf075a2320f7ae..4ef2475aebd64d81 100644
--- a/drivers/clk/Makefile
+++ b/drivers/clk/Makefile
@@ -67,6 +67,7 @@ obj-$(CONFIG_COMMON_CLK_QCOM) += qcom/
obj-$(CONFIG_ARCH_ROCKCHIP) += rockchip/
obj-$(CONFIG_COMMON_CLK_SAMSUNG) += samsung/
obj-$(CONFIG_ARCH_SHMOBILE_MULTI) += shmobile/
+obj-$(CONFIG_ARCH_RENESAS) += shmobile/
obj-$(CONFIG_ARCH_SIRF) += sirf/
obj-$(CONFIG_ARCH_SOCFPGA) += socfpga/
obj-$(CONFIG_PLAT_SPEAR) += spear/
diff --git a/drivers/clk/shmobile/Makefile b/drivers/clk/shmobile/Makefile
index 1eb947db6f5926a0..7e2579b303267d8b 100644
--- a/drivers/clk/shmobile/Makefile
+++ b/drivers/clk/shmobile/Makefile
@@ -8,4 +8,6 @@ obj-$(CONFIG_ARCH_R8A7790) += clk-rcar-gen2.o clk-mstp.o clk-div6.o
obj-$(CONFIG_ARCH_R8A7791) += clk-rcar-gen2.o clk-mstp.o clk-div6.o
obj-$(CONFIG_ARCH_R8A7793) += clk-rcar-gen2.o clk-mstp.o clk-div6.o
obj-$(CONFIG_ARCH_R8A7794) += clk-rcar-gen2.o clk-mstp.o clk-div6.o
+obj-$(CONFIG_ARCH_R8A7795) += renesas-cpg-mssr.o \
+ r8a7795-cpg-mssr.o clk-div6.o
obj-$(CONFIG_ARCH_SH73A0) += clk-sh73a0.o clk-mstp.o clk-div6.o
diff --git a/drivers/clk/shmobile/r8a7795-cpg-mssr.c b/drivers/clk/shmobile/r8a7795-cpg-mssr.c
new file mode 100644
index 0000000000000000..38760c9fa18cdf22
--- /dev/null
+++ b/drivers/clk/shmobile/r8a7795-cpg-mssr.c
@@ -0,0 +1,373 @@
+/*
+ * r8a7795 Clock Pulse Generator / Module Standby and Software Reset
+ *
+ * Copyright (C) 2015 Glider bvba
+ *
+ * Based on clk-rcar-gen3.c
+ *
+ * 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/bug.h>
+#include <linux/clk-provider.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/of.h>
+
+#include <dt-bindings/clock/r8a7795-cpg-mssr.h>
+
+#include "renesas-cpg-mssr.h"
+
+
+enum clk_ids {
+ /* Core Clock Outputs exported to DT */
+ LAST_DT_CORE_CLK = R8A7795_CLK_OSC,
+
+ /* External Input Clocks */
+ CLK_EXTAL,
+ CLK_EXTALR,
+
+ /* Internal Core Clocks */
+ CLK_MAIN,
+ CLK_PLL0,
+ CLK_PLL1,
+ CLK_PLL2,
+ CLK_PLL3,
+ CLK_PLL4,
+ CLK_PLL1_DIV2,
+ CLK_PLL1_DIV4,
+ CLK_S0,
+ CLK_S1,
+ CLK_S2,
+ CLK_S3,
+ CLK_SDSRC,
+ CLK_SSPSRC,
+
+ /* Module Clocks */
+ MOD_CLK_BASE
+};
+
+enum r8a7795_clk_types {
+ CLK_TYPE_GEN3_MAIN = CLK_TYPE_CUSTOM,
+ CLK_TYPE_GEN3_PLL0,
+ CLK_TYPE_GEN3_PLL1,
+ CLK_TYPE_GEN3_PLL2,
+ CLK_TYPE_GEN3_PLL3,
+ CLK_TYPE_GEN3_PLL4,
+};
+
+static const struct cpg_core_clk r8a7795_core_clks[] __initconst = {
+ /* External Clock Inputs */
+ DEF_INPUT("extal", CLK_EXTAL),
+ DEF_INPUT("extalr", CLK_EXTALR),
+
+ /* Internal Core Clocks */
+ DEF_BASE(".main", CLK_MAIN, CLK_TYPE_GEN3_MAIN, CLK_EXTAL),
+ DEF_BASE(".pll0", CLK_PLL0, CLK_TYPE_GEN3_PLL0, CLK_MAIN),
+ DEF_BASE(".pll1", CLK_PLL1, CLK_TYPE_GEN3_PLL1, CLK_MAIN),
+ DEF_BASE(".pll2", CLK_PLL2, CLK_TYPE_GEN3_PLL2, CLK_MAIN),
+ DEF_BASE(".pll3", CLK_PLL3, CLK_TYPE_GEN3_PLL3, CLK_MAIN),
+ DEF_BASE(".pll4", CLK_PLL4, CLK_TYPE_GEN3_PLL4, CLK_MAIN),
+
+ DEF_FIXED(".pll1_div2", CLK_PLL1_DIV2, CLK_PLL1, 2, 1),
+ DEF_FIXED(".pll1_div4", CLK_PLL1_DIV4, CLK_PLL1_DIV2, 2, 1),
+ DEF_FIXED(".s0", CLK_S0, CLK_PLL1_DIV2, 2, 1),
+ DEF_FIXED(".s1", CLK_S1, CLK_PLL1_DIV2, 3, 1),
+ DEF_FIXED(".s2", CLK_S2, CLK_PLL1_DIV2, 4, 1),
+ DEF_FIXED(".s3", CLK_S3, CLK_PLL1_DIV2, 6, 1),
+
+ /* Core Clock Outputs */
+ DEF_FIXED("ztr", R8A7795_CLK_ZTR, CLK_PLL1_DIV2, 6, 1),
+ DEF_FIXED("ztrd2", R8A7795_CLK_ZTRD2, CLK_PLL1_DIV2, 12, 1),
+ DEF_FIXED("zt", R8A7795_CLK_ZT, CLK_PLL1_DIV2, 4, 1),
+ DEF_FIXED("zx", R8A7795_CLK_ZX, CLK_PLL1_DIV2, 2, 1),
+ DEF_FIXED("s0d1", R8A7795_CLK_S0D1, CLK_S0, 1, 1),
+ DEF_FIXED("s0d4", R8A7795_CLK_S0D4, CLK_S0, 4, 1),
+ DEF_FIXED("s1d1", R8A7795_CLK_S1D1, CLK_S1, 1, 1),
+ DEF_FIXED("s1d2", R8A7795_CLK_S1D2, CLK_S1, 2, 1),
+ DEF_FIXED("s1d4", R8A7795_CLK_S1D4, CLK_S1, 4, 1),
+ DEF_FIXED("s2d1", R8A7795_CLK_S2D1, CLK_S2, 1, 1),
+ DEF_FIXED("s2d2", R8A7795_CLK_S2D2, CLK_S2, 2, 1),
+ DEF_FIXED("s2d4", R8A7795_CLK_S2D4, CLK_S2, 4, 1),
+ DEF_FIXED("s3d1", R8A7795_CLK_S3D1, CLK_S3, 1, 1),
+ DEF_FIXED("s3d2", R8A7795_CLK_S3D2, CLK_S3, 2, 1),
+ DEF_FIXED("s3d4", R8A7795_CLK_S3D4, CLK_S3, 4, 1),
+ DEF_FIXED("cl", R8A7795_CLK_CL, CLK_PLL1_DIV2, 48, 1),
+ DEF_FIXED("cp", R8A7795_CLK_CP, CLK_EXTAL, 2, 1),
+
+ DEF_DIV6P1("mso", R8A7795_CLK_MSO, CLK_PLL1_DIV4, 0x014),
+ DEF_DIV6P1("hdmi", R8A7795_CLK_HDMI, CLK_PLL1_DIV2, 0x250),
+};
+
+static const struct mssr_mod_clk r8a7795_mod_clks[] __initconst = {
+ DEF_MOD("scif5", 202, R8A7795_CLK_S3D4),
+ DEF_MOD("scif4", 203, R8A7795_CLK_S3D4),
+ DEF_MOD("scif3", 204, R8A7795_CLK_S3D4),
+ DEF_MOD("scif1", 206, R8A7795_CLK_S3D4),
+ DEF_MOD("scif0", 207, R8A7795_CLK_S3D4),
+ DEF_MOD("msiof3", 208, R8A7795_CLK_MSO),
+ DEF_MOD("msiof2", 209, R8A7795_CLK_MSO),
+ DEF_MOD("msiof1", 210, R8A7795_CLK_MSO),
+ DEF_MOD("msiof0", 211, R8A7795_CLK_MSO),
+ DEF_MOD("sys-dmac2", 217, R8A7795_CLK_S3D1),
+ DEF_MOD("sys-dmac1", 218, R8A7795_CLK_S3D1),
+ DEF_MOD("sys-dmac0", 219, R8A7795_CLK_S3D1),
+ DEF_MOD("scif2", 310, R8A7795_CLK_S3D4),
+ DEF_MOD("intc-ap", 408, R8A7795_CLK_S3D1),
+ DEF_MOD("audmac0", 502, R8A7795_CLK_S3D4),
+ DEF_MOD("audmac1", 501, R8A7795_CLK_S3D4),
+ DEF_MOD("hscif4", 516, R8A7795_CLK_S3D1),
+ DEF_MOD("hscif3", 517, R8A7795_CLK_S3D1),
+ DEF_MOD("hscif2", 518, R8A7795_CLK_S3D1),
+ DEF_MOD("hscif1", 519, R8A7795_CLK_S3D1),
+ DEF_MOD("hscif0", 520, R8A7795_CLK_S3D1),
+ DEF_MOD("vspd3", 620, R8A7795_CLK_S2D1),
+ DEF_MOD("vspd2", 621, R8A7795_CLK_S2D1),
+ DEF_MOD("vspd1", 622, R8A7795_CLK_S2D1),
+ DEF_MOD("vspd0", 623, R8A7795_CLK_S2D1),
+ DEF_MOD("vspbc", 624, R8A7795_CLK_S2D1),
+ DEF_MOD("vspbd", 626, R8A7795_CLK_S2D1),
+ DEF_MOD("vspi2", 629, R8A7795_CLK_S2D1),
+ DEF_MOD("vspi1", 630, R8A7795_CLK_S2D1),
+ DEF_MOD("vspi0", 631, R8A7795_CLK_S2D1),
+ DEF_MOD("ehci2", 701, R8A7795_CLK_S3D4),
+ DEF_MOD("ehci1", 702, R8A7795_CLK_S3D4),
+ DEF_MOD("ehci0", 703, R8A7795_CLK_S3D4),
+ DEF_MOD("hsusb", 704, R8A7795_CLK_S3D4),
+ DEF_MOD("du3", 721, R8A7795_CLK_S2D1),
+ DEF_MOD("du2", 722, R8A7795_CLK_S2D1),
+ DEF_MOD("du1", 723, R8A7795_CLK_S2D1),
+ DEF_MOD("du0", 724, R8A7795_CLK_S2D1),
+ DEF_MOD("hdmi1", 728, R8A7795_CLK_HDMI),
+ DEF_MOD("hdmi0", 729, R8A7795_CLK_HDMI),
+ DEF_MOD("etheravb", 812, R8A7795_CLK_S3D2),
+ DEF_MOD("gpio7", 905, R8A7795_CLK_CP),
+ DEF_MOD("gpio6", 906, R8A7795_CLK_CP),
+ DEF_MOD("gpio5", 907, R8A7795_CLK_CP),
+ DEF_MOD("gpio4", 908, R8A7795_CLK_CP),
+ DEF_MOD("gpio3", 909, R8A7795_CLK_CP),
+ DEF_MOD("gpio2", 910, R8A7795_CLK_CP),
+ DEF_MOD("gpio1", 911, R8A7795_CLK_CP),
+ DEF_MOD("gpio0", 912, R8A7795_CLK_CP),
+ DEF_MOD("i2c6", 918, R8A7795_CLK_S3D2),
+ DEF_MOD("i2c5", 919, R8A7795_CLK_S3D2),
+ DEF_MOD("i2c4", 927, R8A7795_CLK_S3D2),
+ DEF_MOD("i2c3", 928, R8A7795_CLK_S3D2),
+ DEF_MOD("i2c2", 929, R8A7795_CLK_S3D2),
+ DEF_MOD("i2c1", 930, R8A7795_CLK_S3D2),
+ DEF_MOD("i2c0", 931, R8A7795_CLK_S3D2),
+ DEF_MOD("ssi-all", 1005, R8A7795_CLK_S3D4),
+ DEF_MOD("ssi9", 1006, MOD_CLK_ID(1005)),
+ DEF_MOD("ssi8", 1007, MOD_CLK_ID(1005)),
+ DEF_MOD("ssi7", 1008, MOD_CLK_ID(1005)),
+ DEF_MOD("ssi6", 1009, MOD_CLK_ID(1005)),
+ DEF_MOD("ssi5", 1010, MOD_CLK_ID(1005)),
+ DEF_MOD("ssi4", 1011, MOD_CLK_ID(1005)),
+ DEF_MOD("ssi3", 1012, MOD_CLK_ID(1005)),
+ DEF_MOD("ssi2", 1013, MOD_CLK_ID(1005)),
+ DEF_MOD("ssi1", 1014, MOD_CLK_ID(1005)),
+ DEF_MOD("ssi0", 1015, MOD_CLK_ID(1005)),
+ DEF_MOD("scu-all", 1017, R8A7795_CLK_S3D4),
+ DEF_MOD("scu-dvc1", 1018, MOD_CLK_ID(1017)),
+ DEF_MOD("scu-dvc0", 1019, MOD_CLK_ID(1017)),
+ DEF_MOD("scu-ctu1-mix1", 1020, MOD_CLK_ID(1017)),
+ DEF_MOD("scu-ctu0-mix0", 1021, MOD_CLK_ID(1017)),
+ DEF_MOD("scu-src9", 1022, MOD_CLK_ID(1017)),
+ DEF_MOD("scu-src8", 1023, MOD_CLK_ID(1017)),
+ DEF_MOD("scu-src7", 1024, MOD_CLK_ID(1017)),
+ DEF_MOD("scu-src6", 1025, MOD_CLK_ID(1017)),
+ DEF_MOD("scu-src5", 1026, MOD_CLK_ID(1017)),
+ DEF_MOD("scu-src4", 1027, MOD_CLK_ID(1017)),
+ DEF_MOD("scu-src3", 1028, MOD_CLK_ID(1017)),
+ DEF_MOD("scu-src2", 1029, MOD_CLK_ID(1017)),
+ DEF_MOD("scu-src1", 1030, MOD_CLK_ID(1017)),
+ DEF_MOD("scu-src0", 1031, MOD_CLK_ID(1017)),
+};
+
+static const unsigned int r8a7795_crit_mod_clks[] __initconst = {
+ MOD_CLK_ID(408), /* INTC-AP (GIC) */
+};
+
+
+#define CPG_PLL0CR 0x00d8
+#define CPG_PLL2CR 0x002c
+
+/*
+ * CPG Clock Data
+ */
+
+/*
+ * MD EXTAL PLL0 PLL1 PLL2 PLL3 PLL4
+ * 14 13 19 17 (MHz)
+ *-------------------------------------------------------------------
+ * 0 0 0 0 16.66 x 1 x180 x192 x144 x192 x144
+ * 0 0 0 1 16.66 x 1 x180 x192 x144 x128 x144
+ * 0 0 1 0 Prohibited setting
+ * 0 0 1 1 16.66 x 1 x180 x192 x144 x192 x144
+ * 0 1 0 0 20 x 1 x150 x156 x120 x156 x120
+ * 0 1 0 1 20 x 1 x150 x156 x120 x106 x120
+ * 0 1 1 0 Prohibited setting
+ * 0 1 1 1 20 x 1 x150 x156 x120 x156 x120
+ * 1 0 0 0 25 x 1 x120 x128 x96 x128 x96
+ * 1 0 0 1 25 x 1 x120 x128 x96 x84 x96
+ * 1 0 1 0 Prohibited setting
+ * 1 0 1 1 25 x 1 x120 x128 x96 x128 x96
+ * 1 1 0 0 33.33 / 2 x180 x192 x144 x192 x144
+ * 1 1 0 1 33.33 / 2 x180 x192 x144 x128 x144
+ * 1 1 1 0 Prohibited setting
+ * 1 1 1 1 33.33 / 2 x180 x192 x144 x192 x144
+ */
+#define CPG_PLL_CONFIG_INDEX(md) ((((md) & BIT(14)) >> 11) | \
+ (((md) & BIT(13)) >> 11) | \
+ (((md) & BIT(19)) >> 18) | \
+ (((md) & BIT(17)) >> 17))
+
+struct cpg_pll_config {
+ unsigned int extal_div;
+ unsigned int pll1_mult;
+ unsigned int pll3_mult;
+ unsigned int pll4_mult;
+};
+
+static const struct cpg_pll_config cpg_pll_configs[16] __initconst = {
+/* EXTAL div PLL1 PLL3 PLL4 */
+ { 1, 192, 192, 144, },
+ { 1, 192, 128, 144, },
+ { 0, 0, 0, 0, }, /* Prohibited setting */
+ { 1, 192, 192, 144, },
+ { 1, 156, 156, 120, },
+ { 1, 156, 106, 120, },
+ { 0, 0, 0, 0, }, /* Prohibited setting */
+ { 1, 156, 156, 120, },
+ { 1, 128, 128, 96, },
+ { 1, 128, 84, 96, },
+ { 0, 0, 0, 0, }, /* Prohibited setting */
+ { 1, 128, 128, 96, },
+ { 2, 192, 192, 144, },
+ { 2, 192, 128, 144, },
+ { 0, 0, 0, 0, }, /* Prohibited setting */
+ { 2, 192, 192, 144, },
+};
+
+static const struct cpg_pll_config *cpg_pll_config __initdata;
+
+static
+struct clk * __init r8a7795_cpg_clk_register(struct device *dev,
+ const struct cpg_core_clk *core,
+ const struct cpg_mssr_info *info,
+ struct clk **clks,
+ void __iomem *base)
+{
+ const struct clk *parent;
+ unsigned int mult = 1;
+ unsigned int div = 1;
+ u32 value;
+
+ parent = clks[core->parent];
+ if (IS_ERR(parent))
+ return ERR_CAST(parent);
+
+ switch (core->type) {
+ case CLK_TYPE_GEN3_MAIN:
+ div = cpg_pll_config->extal_div;
+ break;
+
+ case CLK_TYPE_GEN3_PLL0:
+ /*
+ * PLL0 is a configurable multiplier clock. Register it as a
+ * fixed factor clock for now as there's no generic multiplier
+ * clock implementation and we currently have no need to change
+ * the multiplier value.
+ */
+ value = readl(base + CPG_PLL0CR);
+ mult = ((value >> 24) & 0x3f) + 1;
+ break;
+
+ case CLK_TYPE_GEN3_PLL1:
+ mult = cpg_pll_config->pll1_mult;
+ break;
+
+ case CLK_TYPE_GEN3_PLL2:
+ /*
+ * PLL2 is a configurable multiplier clock. Register it as a
+ * fixed factor clock for now as there's no generic multiplier
+ * clock implementation and we currently have no need to change
+ * the multiplier value.
+ */
+ value = readl(base + CPG_PLL2CR);
+ mult = ((value >> 24) & 0x3f) + 1;
+ break;
+
+ case CLK_TYPE_GEN3_PLL3:
+ mult = cpg_pll_config->pll3_mult;
+ break;
+
+ case CLK_TYPE_GEN3_PLL4:
+ mult = cpg_pll_config->pll4_mult;
+ break;
+
+ default:
+ return ERR_PTR(-EINVAL);
+ }
+
+ return clk_register_fixed_factor(NULL, core->name,
+ __clk_get_name(parent), 0, mult, div);
+}
+
+/*
+ * Reset register definitions.
+ */
+#define MODEMR 0xe6160060
+
+static u32 rcar_gen3_read_mode_pins(void)
+{
+ void __iomem *modemr = ioremap_nocache(MODEMR, 4);
+ u32 mode;
+
+ BUG_ON(!modemr);
+ mode = ioread32(modemr);
+ iounmap(modemr);
+
+ return mode;
+}
+
+static int __init r8a7795_cpg_mssr_init(struct device *dev)
+{
+ u32 cpg_mode = rcar_gen3_read_mode_pins();
+
+ cpg_pll_config = &cpg_pll_configs[CPG_PLL_CONFIG_INDEX(cpg_mode)];
+ if (!cpg_pll_config->extal_div) {
+ dev_err(dev, "Prohibited setting (cpg_mode=0x%x)\n", cpg_mode);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+const struct cpg_mssr_info r8a7795_cpg_mssr_info __initconst = {
+ /* Core Clocks */
+ .core_clks = r8a7795_core_clks,
+ .num_core_clks = ARRAY_SIZE(r8a7795_core_clks),
+ .last_dt_core_clk = LAST_DT_CORE_CLK,
+ .num_total_core_clks = MOD_CLK_BASE,
+
+ /* Module Clocks */
+ .mod_clks = r8a7795_mod_clks,
+ .num_mod_clks = ARRAY_SIZE(r8a7795_mod_clks),
+ .num_hw_mod_clks = 12 * 32,
+
+ /* Critical Module Clocks */
+ .crit_mod_clks = r8a7795_crit_mod_clks,
+ .num_crit_mod_clks = ARRAY_SIZE(r8a7795_crit_mod_clks),
+
+ /* Callbacks */
+ .init = r8a7795_cpg_mssr_init,
+ .cpg_clk_register = r8a7795_cpg_clk_register,
+};
diff --git a/drivers/clk/shmobile/renesas-cpg-mssr.c b/drivers/clk/shmobile/renesas-cpg-mssr.c
index e4382ba4e1e31aca..a2cccc40fca783bf 100644
--- a/drivers/clk/shmobile/renesas-cpg-mssr.c
+++ b/drivers/clk/shmobile/renesas-cpg-mssr.c
@@ -498,6 +498,12 @@ static inline int cpg_mssr_add_clk_domain(struct device *dev,
static const struct of_device_id cpg_mssr_match[] = {
+#ifdef CONFIG_ARCH_R8A7795
+ {
+ .compatible = "renesas,r8a7795-cpg-mssr",
+ .data = &r8a7795_cpg_mssr_info,
+ },
+#endif
{ /* sentinel */ }
};
diff --git a/drivers/clk/shmobile/renesas-cpg-mssr.h b/drivers/clk/shmobile/renesas-cpg-mssr.h
index e6d24875b56f7755..e09f03cbf086b1d3 100644
--- a/drivers/clk/shmobile/renesas-cpg-mssr.h
+++ b/drivers/clk/shmobile/renesas-cpg-mssr.h
@@ -128,4 +128,5 @@ struct cpg_mssr_info {
struct clk **clks, void __iomem *base);
};
+extern const struct cpg_mssr_info r8a7795_cpg_mssr_info;
#endif
--
1.9.1
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