* [PATCH V3 1/4] clk: max77686: Combine Maxim max77686 and max77802 driver
2016-06-17 10:51 [PATCH V3 0/4] clk: Combine MAX77686 and MAX77802 driver and extend for MAX77620 Laxman Dewangan
@ 2016-06-17 10:51 ` Laxman Dewangan
2016-08-15 22:40 ` Stephen Boyd
2016-06-17 10:51 ` [PATCH V3 2/4] clk: Combine DT binding doc for max77686 and max77802 Laxman Dewangan
` (2 subsequent siblings)
3 siblings, 1 reply; 15+ messages in thread
From: Laxman Dewangan @ 2016-06-17 10:51 UTC (permalink / raw)
To: mturquette, sboyd, robh+dt
Cc: linux-clk, devicetree, linux-kernel, Laxman Dewangan,
Krzysztof Kozlowski, Javier Martinez Canillas
The clock IP used on the Maxim PMICs max77686 and max77802 are
same. The configuration of clock register is also same except
the number of clocks.
Part of common code utilisation, there is 3 files for these chips
clock driver, one for common and two files for driver registration.
Combine both drivers into single file and move common code into
same common file reduces the 2 files and make max77686 and max77802
clock driver in single fine. This driver does not depends on the
parent driver structure. The regmap handle is acquired through
regmap APIs for the register access.
This combination of driver helps on adding clock driver for different
Maxim PMICs which has similar clock IP like MAX77620 and MAX20024.
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
CC: Krzysztof Kozlowski <k.kozlowski@samsung.com>
CC: Javier Martinez Canillas <javier@dowhile0.org>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
Tested-by: Javier Martinez Canillas <javier@osg.samsung.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Tested-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
---
Changes from V1:
- Collected RB and TB from Javier.
- Change the max_gen to max77686.
- Rename structure and avoid duplication for reg and mask.
- Taken care of comment from Krzysztof on coding.
Changes from V2:
- COllected RBs.
---
drivers/clk/Kconfig | 15 +--
drivers/clk/Makefile | 2 -
drivers/clk/clk-max-gen.c | 194 -----------------------------------
drivers/clk/clk-max-gen.h | 32 ------
drivers/clk/clk-max77686.c | 244 ++++++++++++++++++++++++++++++++++++++++++---
drivers/clk/clk-max77802.c | 96 ------------------
6 files changed, 234 insertions(+), 349 deletions(-)
delete mode 100644 drivers/clk/clk-max-gen.c
delete mode 100644 drivers/clk/clk-max-gen.h
delete mode 100644 drivers/clk/clk-max77802.c
diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig
index 98efbfc..6afad74 100644
--- a/drivers/clk/Kconfig
+++ b/drivers/clk/Kconfig
@@ -31,22 +31,11 @@ config COMMON_CLK_WM831X
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"
diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
index dcc5e69..0a3a91b 100644
--- a/drivers/clk/Makefile
+++ b/drivers/clk/Makefile
@@ -26,9 +26,7 @@ obj-$(CONFIG_ARCH_CLPS711X) += clk-clps711x.o
obj-$(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
diff --git a/drivers/clk/clk-max-gen.c b/drivers/clk/clk-max-gen.c
deleted file mode 100644
index 35af9cb..0000000
--- a/drivers/clk/clk-max-gen.c
+++ /dev/null
@@ -1,194 +0,0 @@
-/*
- * 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);
diff --git a/drivers/clk/clk-max-gen.h b/drivers/clk/clk-max-gen.h
deleted file mode 100644
index 997e86f..0000000
--- a/drivers/clk/clk-max-gen.h
+++ /dev/null
@@ -1,32 +0,0 @@
-/*
- * 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__ */
diff --git a/drivers/clk/clk-max77686.c b/drivers/clk/clk-max77686.c
index 9b6f277..9aba3a8 100644
--- a/drivers/clk/clk-max77686.c
+++ b/drivers/clk/clk-max77686.c
@@ -1,5 +1,5 @@
/*
- * 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>
@@ -30,41 +30,261 @@
#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);
diff --git a/drivers/clk/clk-max77802.c b/drivers/clk/clk-max77802.c
deleted file mode 100644
index 355dd2e..0000000
--- a/drivers/clk/clk-max77802.c
+++ /dev/null
@@ -1,96 +0,0 @@
-/*
- * 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");
--
2.1.4
^ permalink raw reply related [flat|nested] 15+ messages in thread* [PATCH V3 2/4] clk: Combine DT binding doc for max77686 and max77802
2016-06-17 10:51 [PATCH V3 0/4] clk: Combine MAX77686 and MAX77802 driver and extend for MAX77620 Laxman Dewangan
2016-06-17 10:51 ` [PATCH V3 1/4] clk: max77686: Combine Maxim max77686 and max77802 driver Laxman Dewangan
@ 2016-06-17 10:51 ` Laxman Dewangan
2016-06-20 16:39 ` Rob Herring
2016-08-15 22:40 ` Stephen Boyd
2016-06-17 10:51 ` [PATCH V3 3/4] clk: max77686: Add DT binding details for PMIC MAX77620 Laxman Dewangan
2016-06-17 10:51 ` [PATCH V3 4/4] clk: max77686: Add support for MAX77620 clocks Laxman Dewangan
3 siblings, 2 replies; 15+ messages in thread
From: Laxman Dewangan @ 2016-06-17 10:51 UTC (permalink / raw)
To: mturquette, sboyd, robh+dt
Cc: linux-clk, devicetree, linux-kernel, Laxman Dewangan,
Krzysztof Kozlowski, Javier Martinez Canillas
The clock IP used on the Maxim PMICs max77686 and max77802 are
same. The configuration of clock register is also same except
the number of clocks.
Define the common DT binding file for the clocks of Maxim PMICs
MAX77686 and MAX77802. For this, remove the separate DT binding
document file for maxim,max77802 and move all information to
maxim,max77686 DT binding document.
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
CC: Krzysztof Kozlowski <k.kozlowski@samsung.com>
CC: Javier Martinez Canillas <javier@dowhile0.org>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
---
Changes from V1:
- Rewrite description to remvoe ref to driver.
- Taken care of comment from Krzysztof on the supported clocks and
DT bindings.
Changes from V2:
- Collected RBs.
---
.../devicetree/bindings/clock/maxim,max77686.txt | 82 ++++++++++++++++------
.../devicetree/bindings/clock/maxim,max77802.txt | 44 ------------
2 files changed, 59 insertions(+), 67 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/clock/maxim,max77802.txt
diff --git a/Documentation/devicetree/bindings/clock/maxim,max77686.txt b/Documentation/devicetree/bindings/clock/maxim,max77686.txt
index 9c40739..4d973b5 100644
--- a/Documentation/devicetree/bindings/clock/maxim,max77686.txt
+++ b/Documentation/devicetree/bindings/clock/maxim,max77686.txt
@@ -1,11 +1,15 @@
-Binding for Maxim MAX77686 32k clock generator block
+Binding for Maxim MAX77686/MAX77802 32k clock generator block
-This is a part of device tree bindings of MAX77686 multi-function device.
-More information can be found in bindings/mfd/max77686.txt file.
+This is a part of device tree bindings of MAX77686/MAX77802 multi-function
+device. More information can be found in bindings/mfd/max77686.txt file for
+MAX77686 and bindings/mfd/max77802.txt for MAX77802.
The MAX77686 contains three 32.768khz clock outputs that can be controlled
(gated/ungated) over I2C.
+The MAX77802 contains two 32.768khz clock outputs that can be controlled
+(gated/ungated) over I2C.
+
Following properties should be presend in main device node of the MFD chip.
Required properties:
@@ -17,30 +21,62 @@ Optional properties:
Each clock is assigned an identifier and client nodes can use this identifier
to specify the clock which they consume. Following indices are allowed:
- - 0: 32khz_ap clock,
- - 1: 32khz_cp clock,
- - 2: 32khz_pmic clock.
+ - 0: 32khz_ap clock (max77686, max77802),
+ - 1: 32khz_cp clock (max77686, max77802),
+ - 2: 32khz_pmic clock (max77686).
Clocks are defined as preprocessor macros in dt-bindings/clock/maxim,max77686.h
-header and can be used in device tree sources.
+header for MAX77686 and dt-bindings/clock/maxim,max77802.h for MAX77802 and can
+be used in device tree sources.
+
+Example:
+
+1. With MAX77686:
+
+#include <dt-bindings/clock/maxim,max77686.h>
+/* ... */
+
+ Node of the MFD chip
+ max77686: max77686@09 {
+ compatible = "maxim,max77686";
+ interrupt-parent = <&wakeup_eint>;
+ interrupts = <26 0>;
+ reg = <0x09>;
+ #clock-cells = <1>;
+
+ /* ... */
+ };
+
+ Clock consumer node
+
+ foo@0 {
+ compatible = "bar,foo";
+ /* ... */
+ clock-names = "my-clock";
+ clocks = <&max77686 MAX77686_CLK_PMIC>;
+ };
+
+2. With MAX77802:
-Example: Node of the MFD chip
+#include <dt-bindings/clock/maxim,max77802.h>
+/* ... */
- max77686: max77686@09 {
- compatible = "maxim,max77686";
- interrupt-parent = <&wakeup_eint>;
- interrupts = <26 0>;
- reg = <0x09>;
- #clock-cells = <1>;
+ Node of the MFD chip
+ max77802: max77802@09 {
+ compatible = "maxim,max77802";
+ interrupt-parent = <&wakeup_eint>;
+ interrupts = <26 0>;
+ reg = <0x09>;
+ #clock-cells = <1>;
- /* ... */
- };
+ /* ... */
+ };
-Example: Clock consumer node
+ Clock consumer node
- foo@0 {
- compatible = "bar,foo";
- /* ... */
- clock-names = "my-clock";
- clocks = <&max77686 MAX77686_CLK_PMIC>;
- };
+ foo@0 {
+ compatible = "bar,foo";
+ /* ... */
+ clock-names = "my-clock";
+ clocks = <&max77802 MAX77802_CLK_32K_AP>;
+ };
diff --git a/Documentation/devicetree/bindings/clock/maxim,max77802.txt b/Documentation/devicetree/bindings/clock/maxim,max77802.txt
deleted file mode 100644
index c6dc783..0000000
--- a/Documentation/devicetree/bindings/clock/maxim,max77802.txt
+++ /dev/null
@@ -1,44 +0,0 @@
-Binding for Maxim MAX77802 32k clock generator block
-
-This is a part of device tree bindings of MAX77802 multi-function device.
-More information can be found in bindings/mfd/max77802.txt file.
-
-The MAX77802 contains two 32.768khz clock outputs that can be controlled
-(gated/ungated) over I2C.
-
-Following properties should be present in main device node of the MFD chip.
-
-Required properties:
-- #clock-cells: From common clock binding; shall be set to 1.
-
-Optional properties:
-- clock-output-names: From common clock binding.
-
-Each clock is assigned an identifier and client nodes can use this identifier
-to specify the clock which they consume. Following indices are allowed:
- - 0: 32khz_ap clock,
- - 1: 32khz_cp clock.
-
-Clocks are defined as preprocessor macros in dt-bindings/clock/maxim,max77802.h
-header and can be used in device tree sources.
-
-Example: Node of the MFD chip
-
- max77802: max77802@09 {
- compatible = "maxim,max77802";
- interrupt-parent = <&wakeup_eint>;
- interrupts = <26 0>;
- reg = <0x09>;
- #clock-cells = <1>;
-
- /* ... */
- };
-
-Example: Clock consumer node
-
- foo@0 {
- compatible = "bar,foo";
- /* ... */
- clock-names = "my-clock";
- clocks = <&max77802 MAX77802_CLK_32K_AP>;
- };
--
2.1.4
^ permalink raw reply related [flat|nested] 15+ messages in thread* [PATCH V3 3/4] clk: max77686: Add DT binding details for PMIC MAX77620
2016-06-17 10:51 [PATCH V3 0/4] clk: Combine MAX77686 and MAX77802 driver and extend for MAX77620 Laxman Dewangan
2016-06-17 10:51 ` [PATCH V3 1/4] clk: max77686: Combine Maxim max77686 and max77802 driver Laxman Dewangan
2016-06-17 10:51 ` [PATCH V3 2/4] clk: Combine DT binding doc for max77686 and max77802 Laxman Dewangan
@ 2016-06-17 10:51 ` Laxman Dewangan
2016-06-20 16:41 ` Rob Herring
2016-08-15 22:40 ` Stephen Boyd
2016-06-17 10:51 ` [PATCH V3 4/4] clk: max77686: Add support for MAX77620 clocks Laxman Dewangan
3 siblings, 2 replies; 15+ messages in thread
From: Laxman Dewangan @ 2016-06-17 10:51 UTC (permalink / raw)
To: mturquette, sboyd, robh+dt
Cc: linux-clk, devicetree, linux-kernel, Laxman Dewangan,
Krzysztof Kozlowski, Javier Martinez Canillas
Maxim has used the same clock IP on multiple PMICs like MAX77686,
MAX77802, MAX77620. Only differences are the number of clocks
from these PMICs like MAX77686 has 3 clocks output, MAX776802 have
two clock output and MAX77620 has one clock output.
Add clock binding details and DT example for the MAX77620.
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
CC: Krzysztof Kozlowski <k.kozlowski@samsung.com>
CC: Javier Martinez Canillas <javier@dowhile0.org>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
---
Changes from V1:
- Use proper comment for the ::::
- Added dt binding preprocessor file as maxim,max77620.h for max77620
inline with the other chip.
- Refer the dt binding header for the supported clock index.
Changes from V2:
- Collected RBs.
---
.../devicetree/bindings/clock/maxim,max77686.txt | 52 +++++++++++++++++-----
include/dt-bindings/clock/maxim,max77620.h | 21 +++++++++
2 files changed, 63 insertions(+), 10 deletions(-)
create mode 100644 include/dt-bindings/clock/maxim,max77620.h
diff --git a/Documentation/devicetree/bindings/clock/maxim,max77686.txt b/Documentation/devicetree/bindings/clock/maxim,max77686.txt
index 4d973b5..8398a3a 100644
--- a/Documentation/devicetree/bindings/clock/maxim,max77686.txt
+++ b/Documentation/devicetree/bindings/clock/maxim,max77686.txt
@@ -1,14 +1,24 @@
-Binding for Maxim MAX77686/MAX77802 32k clock generator block
+Binding for Maxim MAX77686/MAX77802/MAX77620 32k clock generator block
-This is a part of device tree bindings of MAX77686/MAX77802 multi-function
-device. More information can be found in bindings/mfd/max77686.txt file for
-MAX77686 and bindings/mfd/max77802.txt for MAX77802.
+This is a part of device tree bindings of MAX77686/MAX77802/MAX77620
+multi-function device. More information can be found in MFD DT binding
+doc as follows:
+ bindings/mfd/max77686.txt for MAX77686 and
+ bindings/mfd/max77802.txt for MAX77802 and
+ bindings/mfd/max77620.txt for MAX77620.
The MAX77686 contains three 32.768khz clock outputs that can be controlled
-(gated/ungated) over I2C.
+(gated/ungated) over I2C. Clocks are defined as preprocessor macros in
+dt-bindings/clock/maxim,max77686.h.
+
The MAX77802 contains two 32.768khz clock outputs that can be controlled
-(gated/ungated) over I2C.
+(gated/ungated) over I2C. Clocks are defined as preprocessor macros in
+dt-bindings/clock/maxim,max77802.h.
+
+The MAX77686 contains one 32.768khz clock outputs that can be controlled
+(gated/ungated) over I2C. Clocks are defined as preprocessor macros in
+dt-bindings/clock/maxim,max77620.h.
Following properties should be presend in main device node of the MFD chip.
@@ -21,13 +31,12 @@ Optional properties:
Each clock is assigned an identifier and client nodes can use this identifier
to specify the clock which they consume. Following indices are allowed:
- - 0: 32khz_ap clock (max77686, max77802),
+ - 0: 32khz_ap clock (max77686, max77802), 32khz_out0 (max77620)
- 1: 32khz_cp clock (max77686, max77802),
- 2: 32khz_pmic clock (max77686).
-Clocks are defined as preprocessor macros in dt-bindings/clock/maxim,max77686.h
-header for MAX77686 and dt-bindings/clock/maxim,max77802.h for MAX77802 and can
-be used in device tree sources.
+Clocks are defined as preprocessor macros in above dt-binding header for
+respective chips.
Example:
@@ -80,3 +89,26 @@ Example:
clock-names = "my-clock";
clocks = <&max77802 MAX77802_CLK_32K_AP>;
};
+
+
+3. With MAX77620:
+
+#include <dt-bindings/clock/maxim,max77620.h>
+/* ... */
+
+ Node of the MFD chip
+ max77620: max77620@3c {
+ compatible = "maxim,max77620";
+ reg = <0x3c>;
+ #clock-cells = <1>;
+ /* ... */
+ };
+
+ Clock consumer node
+
+ foo@0 {
+ compatible = "bar,foo";
+ /* ... */
+ clock-names = "my-clock";
+ clocks = <&max77620 MAX77620_CLK_32K_OUT0>;
+ };
diff --git a/include/dt-bindings/clock/maxim,max77620.h b/include/dt-bindings/clock/maxim,max77620.h
new file mode 100644
index 0000000..82aba28
--- /dev/null
+++ b/include/dt-bindings/clock/maxim,max77620.h
@@ -0,0 +1,21 @@
+/*
+ * Copyright (C) 2016 NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Device Tree binding constants clocks for the Maxim 77620 PMIC.
+ */
+
+#ifndef _DT_BINDINGS_CLOCK_MAXIM_MAX77620_CLOCK_H
+#define _DT_BINDINGS_CLOCK_MAXIM_MAX77620_CLOCK_H
+
+/* Fixed rate clocks. */
+
+#define MAX77620_CLK_32K_OUT0 0
+
+/* Total number of clocks. */
+#define MAX77620_CLKS_NUM (MAX77620_CLK_32K_OUT0 + 1)
+
+#endif /* _DT_BINDINGS_CLOCK_MAXIM_MAX77620_CLOCK_H */
--
2.1.4
^ permalink raw reply related [flat|nested] 15+ messages in thread* [PATCH V3 4/4] clk: max77686: Add support for MAX77620 clocks
2016-06-17 10:51 [PATCH V3 0/4] clk: Combine MAX77686 and MAX77802 driver and extend for MAX77620 Laxman Dewangan
` (2 preceding siblings ...)
2016-06-17 10:51 ` [PATCH V3 3/4] clk: max77686: Add DT binding details for PMIC MAX77620 Laxman Dewangan
@ 2016-06-17 10:51 ` Laxman Dewangan
2016-08-15 22:40 ` Stephen Boyd
3 siblings, 1 reply; 15+ messages in thread
From: Laxman Dewangan @ 2016-06-17 10:51 UTC (permalink / raw)
To: mturquette, sboyd, robh+dt
Cc: linux-clk, devicetree, linux-kernel, Laxman Dewangan,
Krzysztof Kozlowski, Javier Martinez Canillas
Maxim Max77620 has one 32KHz clock output and the clock HW
IP used on this PMIC is same as what it is there in the MAX77686.
Add clock driver support for MAX77620 on the MAX77686 driver.
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
CC: Krzysztof Kozlowski <k.kozlowski@samsung.com>
CC: Javier Martinez Canillas <javier@dowhile0.org>
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Tested-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
---
Changes from V1:
- Updated based on changes done in first patch.
Changes from V2:
- Collected RBs
- Make uniformity on chip name like 77620/77686/77802 with sequences.
Changes from V2:
- Collected RBs.
- Nit fixes.
---
drivers/clk/Kconfig | 7 ++++---
drivers/clk/clk-max77686.c | 18 ++++++++++++++++++
2 files changed, 22 insertions(+), 3 deletions(-)
diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig
index 6afad74..936a443 100644
--- a/drivers/clk/Kconfig
+++ b/drivers/clk/Kconfig
@@ -32,10 +32,11 @@ config COMMON_CLK_WM831X
source "drivers/clk/versatile/Kconfig"
config COMMON_CLK_MAX77686
- tristate "Clock driver for Maxim 77686/77802 MFD"
- depends on MFD_MAX77686
+ tristate "Clock driver for Maxim 77620/77686/77802 MFD"
+ depends on MFD_MAX77686 || MFD_MAX77620
---help---
- This driver supports Maxim 77686/77802 crystal oscillator clock.
+ This driver supports Maxim 77620/77686/77802 crystal oscillator
+ clock.
config COMMON_CLK_RK808
tristate "Clock driver for RK808"
diff --git a/drivers/clk/clk-max77686.c b/drivers/clk/clk-max77686.c
index 9aba3a8..19f6208 100644
--- a/drivers/clk/clk-max77686.c
+++ b/drivers/clk/clk-max77686.c
@@ -25,6 +25,7 @@
#include <linux/err.h>
#include <linux/module.h>
#include <linux/platform_device.h>
+#include <linux/mfd/max77620.h>
#include <linux/mfd/max77686.h>
#include <linux/mfd/max77686-private.h>
#include <linux/clk-provider.h>
@@ -35,12 +36,14 @@
#include <dt-bindings/clock/maxim,max77686.h>
#include <dt-bindings/clock/maxim,max77802.h>
+#include <dt-bindings/clock/maxim,max77620.h>
#define MAX77802_CLOCK_LOW_JITTER_SHIFT 0x3
enum max77686_chip_name {
CHIP_MAX77686,
CHIP_MAX77802,
+ CHIP_MAX77620,
};
struct max77686_hw_clk_info {
@@ -97,6 +100,15 @@ max77686_hw_clk_info max77802_hw_clks_info[MAX77802_CLKS_NUM] = {
},
};
+static const struct
+max77686_hw_clk_info max77620_hw_clks_info[MAX77620_CLKS_NUM] = {
+ [MAX77620_CLK_32K_OUT0] = {
+ .name = "32khz_out0",
+ .clk_reg = MAX77620_REG_CNFG1_32K,
+ .clk_enable_mask = MAX77620_CNFG1_32K_OUT0_EN,
+ },
+};
+
static struct max77686_clk_init_data *to_max77686_clk_init_data(
struct clk_hw *hw)
{
@@ -181,6 +193,11 @@ static int max77686_clk_probe(struct platform_device *pdev)
hw_clks = max77802_hw_clks_info;
break;
+ case CHIP_MAX77620:
+ num_clks = MAX77620_CLKS_NUM;
+ hw_clks = max77620_hw_clks_info;
+ break;
+
default:
dev_err(dev, "Unknown Chip ID\n");
return -EINVAL;
@@ -284,6 +301,7 @@ static int max77686_clk_remove(struct platform_device *pdev)
static const struct platform_device_id max77686_clk_id[] = {
{ "max77686-clk", .driver_data = CHIP_MAX77686, },
{ "max77802-clk", .driver_data = CHIP_MAX77802, },
+ { "max77620-clock", .driver_data = CHIP_MAX77620, },
{},
};
MODULE_DEVICE_TABLE(platform, max77686_clk_id);
--
2.1.4
^ permalink raw reply related [flat|nested] 15+ messages in thread