Re: [PATCH v3 1/6] mfd: max77843: Add max77843 MFD driver core driver
From: Jaewon Kim
Date: Sun Feb 22 2015 - 20:43:32 EST
Hi Lee Jones,
On 02/16/2015 10:51 PM, Lee Jones wrote:
On Wed, 04 Feb 2015, Jaewon Kim wrote:
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 <lee.jones@xxxxxxxxxx>
Signed-off-by: Jaewon Kim <jaewon02.kim@xxxxxxxxxxx>
Signed-off-by: Beomho Seo <beomho.seo@xxxxxxxxxxx>
---
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-$(CONFIG_MFD_MAX77843) += max77843.o
This is the 11th MAX driver. Can't they be supported using device
specific data structures instead of taking a 'one file per device'
approach?
Kzysztof answered already, we try to merge with other files.
But MAX77843 can`t merge with another MAX drivers.
Because This driver has new features (e.g AFC charger, Reverse Boost, 4
channel LED driver, etc)
so new registers extended and moved.
obj-$(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@xxxxxxxxxxx>
+ * Author: Beomho Seo <beomho.seo@xxxxxxxxxxx>
+ *
+ * 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>
[...]
+static int max77843_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
Strange tabbing here.
I will fix it in next version.
+{
+ 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, ®_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 '('.
+ 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.
+ .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
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/