Hi Lee Jones,

On 02/16/2015 10:51 PM, Lee Jones wrote:

On Wed, 04 Feb 2015, Jaewon Kim wrote:

quoted

This patch adds MAX77843 core/irq driver to support PMIC,
MUIC(Micro USB Interface Controller), Charger, Fuel Gauge,
LED and Haptic device.

Cc: Lee Jones <redacted>
Signed-off-by: Jaewon Kim <redacted>
Signed-off-by: Beomho Seo <redacted>
---
  drivers/mfd/Kconfig                  |   14 ++
  drivers/mfd/Makefile                 |    1 +
  drivers/mfd/max77843.c               |  245 +++++++++++++++++++
  include/linux/mfd/max77843-private.h |  441 ++++++++++++++++++++++++++++++++++
  4 files changed, 701 insertions(+)
  create mode 100644 drivers/mfd/max77843.c
  create mode 100644 include/linux/mfd/max77843-private.h

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 2e6b731..0c67c79 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig

@@ -442,6 +442,20 @@ config MFD_MAX77693
  	  additional drivers must be enabled in order to use the functionality
  	  of the device.
  
+config MFD_MAX77843
+	bool "Maxim Semiconductor MAX77843 PMIC Support"
+	depends on I2C=y
+	select MFD_CORE
+	select REGMAP_I2C
+	select REGMAP_IRQ
+	help
+	  Say yes here to add support for Maxim Semiconductor MAX77843.
+	  This is companion Power Management IC with LEDs, Haptic, Charger,
+	  Fuel Gauge, MUIC(Micro USB Interface Controller) controls on chip.
+	  This driver provides common support for accessing the device;
+	  additional drivers must be enabled in order to use the functionality
+	  of the device.
+
  config MFD_MAX8907
  	tristate "Maxim Semiconductor MAX8907 PMIC Support"
  	select MFD_CORE

diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 53467e2..fe4f75c 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile

@@ -117,6 +117,7 @@ obj-$(CONFIG_MFD_DA9063)	+= da9063.o
  obj-$(CONFIG_MFD_MAX14577)	+= max14577.o
  obj-$(CONFIG_MFD_MAX77686)	+= max77686.o
  obj-$(CONFIG_MFD_MAX77693)	+= max77693.o
+obj-$(CONFIG_MFD_MAX77843)	+= max77843.o

This is the 11th MAX driver.  Can't they be supported using device
specific data structures instead of taking a 'one file per device'
approach?

Kzysztof answered already, we try to merge with other files.
But MAX77843 can`t merge with another MAX drivers.
Because This driver has new features (e.g AFC charger, Reverse Boost, 4 
channel LED driver, etc)
so new registers extended and moved.

quoted

  obj-$(CONFIG_MFD_MAX8907)	+= max8907.o
  max8925-objs			:= max8925-core.o max8925-i2c.o
  obj-$(CONFIG_MFD_MAX8925)	+= max8925.o

diff --git a/drivers/mfd/max77843.c b/drivers/mfd/max77843.c
new file mode 100644
index 0000000..191a557
--- /dev/null
+++ b/drivers/mfd/max77843.c

@@ -0,0 +1,245 @@
+/*
+ * max77843.c - MFD core driver for the Maxim MAX77843
+ *
+ * Copyright (C) 2015 Samsung Electronics
+ * Author: Jaewon Kim <jaewon02.kim@samsung.com>
+ * Author: Beomho Seo <beomho.seo@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.
+ */
+
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/max77843-private.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>

[...]

quoted

+static int max77843_probe(struct i2c_client *i2c,
+					const struct i2c_device_id *id)

Strange tabbing here.

I will fix it in next version.

quoted

+{
+	struct max77843 *max77843;
+	unsigned int reg_data;
+	int ret;
+
+	max77843 = devm_kzalloc(&i2c->dev, sizeof(*max77843), GFP_KERNEL);
+	if (!max77843)
+		return -ENOMEM;
+
+	i2c_set_clientdata(i2c, max77843);
+	max77843->dev = &i2c->dev;
+	max77843->i2c = i2c;
+	max77843->irq = i2c->irq;
+
+	max77843->regmap = devm_regmap_init_i2c(i2c,
+			&max77843_regmap_config);
+	if (IS_ERR(max77843->regmap)) {
+		dev_err(&i2c->dev, "Failed to allocate topsys register map\n");
+		return PTR_ERR(max77843->regmap);
+	}
+
+	ret = regmap_add_irq_chip(max77843->regmap, max77843->irq,
+			IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED,
+			0, &max77843_irq_chip, &max77843->irq_data);
+	if (ret) {
+		dev_err(&i2c->dev, "Failed to add TOPSYS IRQ chip\n");
+		return ret;
+	}
+
+	ret = regmap_read(max77843->regmap,
+			MAX77843_SYS_REG_PMICID, &reg_data);
+	if (ret < 0) {
+		dev_err(&i2c->dev, "Failed to read PMIC ID\n");
+		goto err_pmic_id;
+	}
+	dev_info(&i2c->dev, "device ID: 0x%x\n", reg_data);
+
+	ret = max77843_chg_init(max77843);
+	if (ret) {
+		dev_err(&i2c->dev, "Failed to init Charger\n");
+		goto err_pmic_id;
+	}
+
+	ret = regmap_update_bits(max77843->regmap,
+			MAX77843_SYS_REG_INTSRCMASK,
+			MAX77843_INTSRC_MASK_MASK,
+			(unsigned int)~MAX77843_INTSRC_MASK_MASK);

This stuff looks so much better/easier to read if you line up against
the '('.

Okay, I will line up against '('.

quoted

+	if (ret < 0) {
+		dev_err(&i2c->dev, "Failed to unmask interrupt source\n");
+		goto err_pmic_id;
+	}
+
+	ret = mfd_add_devices(max77843->dev, -1, max77843_devs,
+			ARRAY_SIZE(max77843_devs), NULL, 0, NULL);
+	if (ret < 0) {
+		dev_err(&i2c->dev, "Failed to add mfd device\n");
+		goto err_pmic_id;
+	}
+
+	device_init_wakeup(max77843->dev, 1);
+
+	return 0;
+
+err_pmic_id:
+	regmap_del_irq_chip(max77843->irq, max77843->irq_data);
+
+	return ret;
+}
+
+static int max77843_remove(struct i2c_client *i2c)
+{
+	struct max77843 *max77843 = i2c_get_clientdata(i2c);
+
+	mfd_remove_devices(max77843->dev);
+
+	regmap_del_irq_chip(max77843->irq, max77843->irq_data);
+
+	i2c_unregister_device(max77843->i2c_chg);
+	i2c_unregister_device(max77843->i2c);
+
+	return 0;
+}
+
+static const struct of_device_id max77843_dt_match[] = {
+	{ .compatible = "maxim,max77843", },
+	{ /* sentinel */ },
+};
+
+static const struct i2c_device_id max77843_id[] = {
+	{ "max77843", },
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(i2c, max77843_id);
+
+static int __maybe_unused max77843_suspend(struct device *dev)
+{
+	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
+	struct max77843 *max77843 = i2c_get_clientdata(i2c);
+
+	if (device_may_wakeup(dev))
+		enable_irq_wake(max77843->irq);
+	disable_irq(max77843->irq);
+
+	return 0;
+}
+
+static int __maybe_unused max77843_resume(struct device *dev)
+{
+	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
+	struct max77843 *max77843 = i2c_get_clientdata(i2c);
+
+	if (device_may_wakeup(dev))
+		disable_irq_wake(max77843->irq);
+	enable_irq(max77843->irq);
+
+	return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(max77843_pm, max77843_suspend, max77843_resume);
+
+static struct i2c_driver max77843_i2c_driver = {
+	.driver		= {

More strange whitespace stuff.

I'm gussing you haven't run checkpatch.pl.

Please do so and fix-up the warnings.

".drivers" is seven letters. So, it seems like a white space but it is tab
Anyway, I will not lining up driver structure in next version.

quoted

+		.name		= "max77843",
+		.pm		= &max77843_pm,
+		.of_match_table = max77843_dt_match,
+	},

Lining these up with the '=' doesn't make the code any better IMO.

[...]

Thanks to review my patch.
I will send version4 soon.


Thanks,
Jaewon Kim