source "drivers/clk/versatile/Kconfig"
-config COMMON_CLK_MAX_GEN
- bool
-
config COMMON_CLK_MAX77686
- tristate "Clock driver for Maxim 77686 MFD"
- depends on MFD_MAX77686
- select COMMON_CLK_MAX_GEN
- ---help---
- This driver supports Maxim 77686 crystal oscillator clock.
-
-config COMMON_CLK_MAX77802
- tristate "Clock driver for Maxim 77802 PMIC"
+ tristate "Clock driver for Maxim 77686/77802 MFD"
depends on MFD_MAX77686
- select COMMON_CLK_MAX_GEN
---help---
- This driver supports Maxim 77802 crystal oscillator clock.
+ This driver supports Maxim 77686/77802 crystal oscillator clock.
config COMMON_CLK_RK808
tristate "Clock driver for RK808/RK818"
obj-$(CONFIG_ARCH_EFM32) += clk-efm32gg.o
obj-$(CONFIG_ARCH_HIGHBANK) += clk-highbank.o
obj-$(CONFIG_MACH_LOONGSON32) += clk-ls1x.o
-obj-$(CONFIG_COMMON_CLK_MAX_GEN) += clk-max-gen.o
obj-$(CONFIG_COMMON_CLK_MAX77686) += clk-max77686.o
-obj-$(CONFIG_COMMON_CLK_MAX77802) += clk-max77802.o
obj-$(CONFIG_ARCH_MB86S7X) += clk-mb86s7x.o
obj-$(CONFIG_ARCH_MOXART) += clk-moxart.o
obj-$(CONFIG_ARCH_NOMADIK) += clk-nomadik.o
+++ /dev/null
-/*
- * clk-max-gen.c - Generic clock driver for Maxim PMICs clocks
- *
- * Copyright (C) 2014 Google, Inc
- *
- * Copyright (C) 2012 Samsung Electornics
- * Jonghwa Lee <jonghwa3.lee@samsung.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; either version 2 of the License, or (at your
- * option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * This driver is based on clk-max77686.c
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/err.h>
-#include <linux/regmap.h>
-#include <linux/platform_device.h>
-#include <linux/clk-provider.h>
-#include <linux/mutex.h>
-#include <linux/clkdev.h>
-#include <linux/of.h>
-#include <linux/export.h>
-
-#include "clk-max-gen.h"
-
-struct max_gen_clk {
- struct regmap *regmap;
- u32 mask;
- u32 reg;
- struct clk_hw hw;
-};
-
-static struct max_gen_clk *to_max_gen_clk(struct clk_hw *hw)
-{
- return container_of(hw, struct max_gen_clk, hw);
-}
-
-static int max_gen_clk_prepare(struct clk_hw *hw)
-{
- struct max_gen_clk *max_gen = to_max_gen_clk(hw);
-
- return regmap_update_bits(max_gen->regmap, max_gen->reg,
- max_gen->mask, max_gen->mask);
-}
-
-static void max_gen_clk_unprepare(struct clk_hw *hw)
-{
- struct max_gen_clk *max_gen = to_max_gen_clk(hw);
-
- regmap_update_bits(max_gen->regmap, max_gen->reg,
- max_gen->mask, ~max_gen->mask);
-}
-
-static int max_gen_clk_is_prepared(struct clk_hw *hw)
-{
- struct max_gen_clk *max_gen = to_max_gen_clk(hw);
- int ret;
- u32 val;
-
- ret = regmap_read(max_gen->regmap, max_gen->reg, &val);
-
- if (ret < 0)
- return -EINVAL;
-
- return val & max_gen->mask;
-}
-
-static unsigned long max_gen_recalc_rate(struct clk_hw *hw,
- unsigned long parent_rate)
-{
- return 32768;
-}
-
-struct clk_ops max_gen_clk_ops = {
- .prepare = max_gen_clk_prepare,
- .unprepare = max_gen_clk_unprepare,
- .is_prepared = max_gen_clk_is_prepared,
- .recalc_rate = max_gen_recalc_rate,
-};
-EXPORT_SYMBOL_GPL(max_gen_clk_ops);
-
-static struct clk *max_gen_clk_register(struct device *dev,
- struct max_gen_clk *max_gen)
-{
- struct clk *clk;
- struct clk_hw *hw = &max_gen->hw;
- int ret;
-
- clk = devm_clk_register(dev, hw);
- if (IS_ERR(clk))
- return clk;
-
- ret = clk_register_clkdev(clk, hw->init->name, NULL);
-
- if (ret)
- return ERR_PTR(ret);
-
- return clk;
-}
-
-int max_gen_clk_probe(struct platform_device *pdev, struct regmap *regmap,
- u32 reg, struct clk_init_data *clks_init, int num_init)
-{
- int i, ret;
- struct max_gen_clk *max_gen_clks;
- struct clk **clocks;
- struct device *dev = pdev->dev.parent;
- const char *clk_name;
- struct clk_init_data *init;
-
- clocks = devm_kzalloc(dev, sizeof(struct clk *) * num_init, GFP_KERNEL);
- if (!clocks)
- return -ENOMEM;
-
- max_gen_clks = devm_kzalloc(dev, sizeof(struct max_gen_clk)
- * num_init, GFP_KERNEL);
- if (!max_gen_clks)
- return -ENOMEM;
-
- for (i = 0; i < num_init; i++) {
- max_gen_clks[i].regmap = regmap;
- max_gen_clks[i].mask = 1 << i;
- max_gen_clks[i].reg = reg;
-
- init = devm_kzalloc(dev, sizeof(*init), GFP_KERNEL);
- if (!init)
- return -ENOMEM;
-
- if (dev->of_node &&
- !of_property_read_string_index(dev->of_node,
- "clock-output-names",
- i, &clk_name))
- init->name = clk_name;
- else
- init->name = clks_init[i].name;
-
- init->ops = clks_init[i].ops;
- init->flags = clks_init[i].flags;
-
- max_gen_clks[i].hw.init = init;
-
- clocks[i] = max_gen_clk_register(dev, &max_gen_clks[i]);
- if (IS_ERR(clocks[i])) {
- ret = PTR_ERR(clocks[i]);
- dev_err(dev, "failed to register %s\n",
- max_gen_clks[i].hw.init->name);
- return ret;
- }
- }
-
- platform_set_drvdata(pdev, clocks);
-
- if (dev->of_node) {
- struct clk_onecell_data *of_data;
-
- of_data = devm_kzalloc(dev, sizeof(*of_data), GFP_KERNEL);
- if (!of_data)
- return -ENOMEM;
-
- of_data->clks = clocks;
- of_data->clk_num = num_init;
- ret = of_clk_add_provider(dev->of_node, of_clk_src_onecell_get,
- of_data);
-
- if (ret) {
- dev_err(dev, "failed to register OF clock provider\n");
- return ret;
- }
- }
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(max_gen_clk_probe);
-
-int max_gen_clk_remove(struct platform_device *pdev, int num_init)
-{
- struct device *dev = pdev->dev.parent;
-
- if (dev->of_node)
- of_clk_del_provider(dev->of_node);
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(max_gen_clk_remove);
+++ /dev/null
-/*
- * clk-max-gen.h - Generic clock driver for Maxim PMICs clocks
- *
- * Copyright (C) 2014 Google, Inc
- *
- * 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; either version 2 of the License, or (at your
- * option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- */
-
-#ifndef __CLK_MAX_GEN_H__
-#define __CLK_MAX_GEN_H__
-
-#include <linux/types.h>
-#include <linux/device.h>
-#include <linux/clkdev.h>
-#include <linux/regmap.h>
-#include <linux/platform_device.h>
-
-int max_gen_clk_probe(struct platform_device *pdev, struct regmap *regmap,
- u32 reg, struct clk_init_data *clks_init, int num_init);
-int max_gen_clk_remove(struct platform_device *pdev, int num_init);
-extern struct clk_ops max_gen_clk_ops;
-
-#endif /* __CLK_MAX_GEN_H__ */
/*
- * clk-max77686.c - Clock driver for Maxim 77686
+ * clk-max77686.c - Clock driver for Maxim 77686/MAX77802
*
* Copyright (C) 2012 Samsung Electornics
* Jonghwa Lee <jonghwa3.lee@samsung.com>
#include <linux/clk-provider.h>
#include <linux/mutex.h>
#include <linux/clkdev.h>
+#include <linux/of.h>
+#include <linux/regmap.h>
#include <dt-bindings/clock/maxim,max77686.h>
-#include "clk-max-gen.h"
+#include <dt-bindings/clock/maxim,max77802.h>
-static struct clk_init_data max77686_clks_init[MAX77686_CLKS_NUM] = {
+#define MAX77802_CLOCK_LOW_JITTER_SHIFT 0x3
+
+enum max77686_chip_name {
+ CHIP_MAX77686,
+ CHIP_MAX77802,
+};
+
+struct max77686_hw_clk_info {
+ const char *name;
+ u32 clk_reg;
+ u32 clk_enable_mask;
+ u32 flags;
+};
+
+struct max77686_clk_init_data {
+ struct regmap *regmap;
+ struct clk_hw hw;
+ struct clk_init_data clk_idata;
+ const struct max77686_hw_clk_info *clk_info;
+};
+
+struct max77686_clk_driver_data {
+ enum max77686_chip_name chip;
+ struct clk **clks;
+ struct max77686_clk_init_data *max_clk_data;
+ struct clk_onecell_data of_data;
+};
+
+static const struct
+max77686_hw_clk_info max77686_hw_clks_info[MAX77686_CLKS_NUM] = {
[MAX77686_CLK_AP] = {
.name = "32khz_ap",
- .ops = &max_gen_clk_ops,
+ .clk_reg = MAX77686_REG_32KHZ,
+ .clk_enable_mask = BIT(MAX77686_CLK_AP),
},
[MAX77686_CLK_CP] = {
.name = "32khz_cp",
- .ops = &max_gen_clk_ops,
+ .clk_reg = MAX77686_REG_32KHZ,
+ .clk_enable_mask = BIT(MAX77686_CLK_CP),
},
[MAX77686_CLK_PMIC] = {
.name = "32khz_pmic",
- .ops = &max_gen_clk_ops,
+ .clk_reg = MAX77686_REG_32KHZ,
+ .clk_enable_mask = BIT(MAX77686_CLK_PMIC),
+ },
+};
+
+static const struct
+max77686_hw_clk_info max77802_hw_clks_info[MAX77802_CLKS_NUM] = {
+ [MAX77802_CLK_32K_AP] = {
+ .name = "32khz_ap",
+ .clk_reg = MAX77802_REG_32KHZ,
+ .clk_enable_mask = BIT(MAX77802_CLK_32K_AP),
+ },
+ [MAX77802_CLK_32K_CP] = {
+ .name = "32khz_cp",
+ .clk_reg = MAX77802_REG_32KHZ,
+ .clk_enable_mask = BIT(MAX77802_CLK_32K_CP),
},
};
+static struct max77686_clk_init_data *to_max77686_clk_init_data(
+ struct clk_hw *hw)
+{
+ return container_of(hw, struct max77686_clk_init_data, hw);
+}
+
+static int max77686_clk_prepare(struct clk_hw *hw)
+{
+ struct max77686_clk_init_data *max77686 = to_max77686_clk_init_data(hw);
+
+ return regmap_update_bits(max77686->regmap, max77686->clk_info->clk_reg,
+ max77686->clk_info->clk_enable_mask,
+ max77686->clk_info->clk_enable_mask);
+}
+
+static void max77686_clk_unprepare(struct clk_hw *hw)
+{
+ struct max77686_clk_init_data *max77686 = to_max77686_clk_init_data(hw);
+
+ regmap_update_bits(max77686->regmap, max77686->clk_info->clk_reg,
+ max77686->clk_info->clk_enable_mask,
+ ~max77686->clk_info->clk_enable_mask);
+}
+
+static int max77686_clk_is_prepared(struct clk_hw *hw)
+{
+ struct max77686_clk_init_data *max77686 = to_max77686_clk_init_data(hw);
+ int ret;
+ u32 val;
+
+ ret = regmap_read(max77686->regmap, max77686->clk_info->clk_reg, &val);
+
+ if (ret < 0)
+ return -EINVAL;
+
+ return val & max77686->clk_info->clk_enable_mask;
+}
+
+static unsigned long max77686_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ return 32768;
+}
+
+static struct clk_ops max77686_clk_ops = {
+ .prepare = max77686_clk_prepare,
+ .unprepare = max77686_clk_unprepare,
+ .is_prepared = max77686_clk_is_prepared,
+ .recalc_rate = max77686_recalc_rate,
+};
+
static int max77686_clk_probe(struct platform_device *pdev)
{
- struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
+ struct device *dev = &pdev->dev;
+ struct device *parent = dev->parent;
+ const struct platform_device_id *id = platform_get_device_id(pdev);
+ struct max77686_clk_driver_data *drv_data;
+ const struct max77686_hw_clk_info *hw_clks;
+ struct regmap *regmap;
+ int i, ret, num_clks;
+
+ drv_data = devm_kzalloc(dev, sizeof(*drv_data), GFP_KERNEL);
+ if (!drv_data)
+ return -ENOMEM;
+
+ regmap = dev_get_regmap(parent, NULL);
+ if (!regmap) {
+ dev_err(dev, "Failed to get rtc regmap\n");
+ return -ENODEV;
+ }
+
+ drv_data->chip = id->driver_data;
+
+ switch (drv_data->chip) {
+ case CHIP_MAX77686:
+ num_clks = MAX77686_CLKS_NUM;
+ hw_clks = max77686_hw_clks_info;
+ break;
+
+ case CHIP_MAX77802:
+ num_clks = MAX77802_CLKS_NUM;
+ hw_clks = max77802_hw_clks_info;
+ break;
+
+ default:
+ dev_err(dev, "Unknown Chip ID\n");
+ return -EINVAL;
+ }
+
+ drv_data->max_clk_data = devm_kcalloc(dev, num_clks,
+ sizeof(*drv_data->max_clk_data),
+ GFP_KERNEL);
+ if (!drv_data->max_clk_data)
+ return -ENOMEM;
+
+ drv_data->clks = devm_kcalloc(dev, num_clks,
+ sizeof(*drv_data->clks), GFP_KERNEL);
+ if (!drv_data->clks)
+ return -ENOMEM;
- return max_gen_clk_probe(pdev, iodev->regmap, MAX77686_REG_32KHZ,
- max77686_clks_init, MAX77686_CLKS_NUM);
+ for (i = 0; i < num_clks; i++) {
+ struct max77686_clk_init_data *max_clk_data;
+ struct clk *clk;
+ const char *clk_name;
+
+ max_clk_data = &drv_data->max_clk_data[i];
+
+ max_clk_data->regmap = regmap;
+ max_clk_data->clk_info = &hw_clks[i];
+ max_clk_data->clk_idata.flags = hw_clks[i].flags;
+ max_clk_data->clk_idata.ops = &max77686_clk_ops;
+
+ if (parent->of_node &&
+ !of_property_read_string_index(parent->of_node,
+ "clock-output-names",
+ i, &clk_name))
+ max_clk_data->clk_idata.name = clk_name;
+ else
+ max_clk_data->clk_idata.name = hw_clks[i].name;
+
+ max_clk_data->hw.init = &max_clk_data->clk_idata;
+
+ clk = devm_clk_register(dev, &max_clk_data->hw);
+ if (IS_ERR(clk)) {
+ ret = PTR_ERR(clk);
+ dev_err(dev, "Failed to clock register: %d\n", ret);
+ return ret;
+ }
+
+ ret = clk_register_clkdev(clk, max_clk_data->clk_idata.name,
+ NULL);
+ if (ret < 0) {
+ dev_err(dev, "Failed to clkdev register: %d\n", ret);
+ return ret;
+ }
+ drv_data->clks[i] = clk;
+ }
+
+ platform_set_drvdata(pdev, drv_data);
+
+ if (parent->of_node) {
+ drv_data->of_data.clks = drv_data->clks;
+ drv_data->of_data.clk_num = num_clks;
+ ret = of_clk_add_provider(parent->of_node,
+ of_clk_src_onecell_get,
+ &drv_data->of_data);
+
+ if (ret < 0) {
+ dev_err(dev, "Failed to register OF clock provider: %d\n",
+ ret);
+ return ret;
+ }
+ }
+
+ /* MAX77802: Enable low-jitter mode on the 32khz clocks. */
+ if (drv_data->chip == CHIP_MAX77802) {
+ ret = regmap_update_bits(regmap, MAX77802_REG_32KHZ,
+ 1 << MAX77802_CLOCK_LOW_JITTER_SHIFT,
+ 1 << MAX77802_CLOCK_LOW_JITTER_SHIFT);
+ if (ret < 0) {
+ dev_err(dev, "Failed to config low-jitter: %d\n", ret);
+ goto remove_of_clk_provider;
+ }
+ }
+
+ return 0;
+
+remove_of_clk_provider:
+ if (parent->of_node)
+ of_clk_del_provider(parent->of_node);
+
+ return ret;
}
static int max77686_clk_remove(struct platform_device *pdev)
{
- return max_gen_clk_remove(pdev, MAX77686_CLKS_NUM);
+ struct device *parent = pdev->dev.parent;
+
+ if (parent->of_node)
+ of_clk_del_provider(parent->of_node);
+
+ return 0;
}
static const struct platform_device_id max77686_clk_id[] = {
- { "max77686-clk", 0},
- { },
+ { "max77686-clk", .driver_data = CHIP_MAX77686, },
+ { "max77802-clk", .driver_data = CHIP_MAX77802, },
+ {},
};
MODULE_DEVICE_TABLE(platform, max77686_clk_id);
+++ /dev/null
-/*
- * clk-max77802.c - Clock driver for Maxim 77802
- *
- * Copyright (C) 2014 Google, Inc
- *
- * Copyright (C) 2012 Samsung Electornics
- * Jonghwa Lee <jonghwa3.lee@samsung.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; either version 2 of the License, or (at your
- * option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * This driver is based on clk-max77686.c
- */
-
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/err.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/mfd/max77686-private.h>
-#include <linux/clk-provider.h>
-#include <linux/mutex.h>
-#include <linux/clkdev.h>
-
-#include <dt-bindings/clock/maxim,max77802.h>
-#include "clk-max-gen.h"
-
-#define MAX77802_CLOCK_OPMODE_MASK 0x1
-#define MAX77802_CLOCK_LOW_JITTER_SHIFT 0x3
-
-static struct clk_init_data max77802_clks_init[MAX77802_CLKS_NUM] = {
- [MAX77802_CLK_32K_AP] = {
- .name = "32khz_ap",
- .ops = &max_gen_clk_ops,
- },
- [MAX77802_CLK_32K_CP] = {
- .name = "32khz_cp",
- .ops = &max_gen_clk_ops,
- },
-};
-
-static int max77802_clk_probe(struct platform_device *pdev)
-{
- struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
- int ret;
-
- ret = max_gen_clk_probe(pdev, iodev->regmap, MAX77802_REG_32KHZ,
- max77802_clks_init, MAX77802_CLKS_NUM);
-
- if (ret) {
- dev_err(&pdev->dev, "generic probe failed %d\n", ret);
- return ret;
- }
-
- /* Enable low-jitter mode on the 32khz clocks. */
- ret = regmap_update_bits(iodev->regmap, MAX77802_REG_32KHZ,
- 1 << MAX77802_CLOCK_LOW_JITTER_SHIFT,
- 1 << MAX77802_CLOCK_LOW_JITTER_SHIFT);
- if (ret < 0)
- dev_err(&pdev->dev, "failed to enable low-jitter mode\n");
-
- return ret;
-}
-
-static int max77802_clk_remove(struct platform_device *pdev)
-{
- return max_gen_clk_remove(pdev, MAX77802_CLKS_NUM);
-}
-
-static const struct platform_device_id max77802_clk_id[] = {
- { "max77802-clk", 0},
- { },
-};
-MODULE_DEVICE_TABLE(platform, max77802_clk_id);
-
-static struct platform_driver max77802_clk_driver = {
- .driver = {
- .name = "max77802-clk",
- },
- .probe = max77802_clk_probe,
- .remove = max77802_clk_remove,
- .id_table = max77802_clk_id,
-};
-
-module_platform_driver(max77802_clk_driver);
-
-MODULE_DESCRIPTION("MAXIM 77802 Clock Driver");
-MODULE_AUTHOR("Javier Martinez Canillas <javier@osg.samsung.com");
-MODULE_LICENSE("GPL");
projects / platform / kernel / linux-exynos.git / commitdiff