drivers/mfd/s2mpb02-core.c - LeafOS-Devices/android_kernel_samsung_universal7904 - Gitiles

 /*
  * s2mpb02-core.c - mfd core driver for the Samsung s2mpb02
  *
  * Copyright (C) 2014 Samsung Electronics
  *
  * 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.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  *
  * This driver is based on max77804.c
  */

 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/i2c.h>
 #include <linux/irq.h>
 #include <linux/interrupt.h>
 #include <linux/mutex.h>
 #include <linux/mfd/core.h>
 #include <linux/mfd/s2mpb02.h>
 #include <linux/mfd/s2mpb02-private.h>
 #include <linux/regulator/machine.h>

 #ifdef	CONFIG_OF
 #include <linux/of_device.h>
 #include <linux/of_gpio.h>
 #endif /* CONFIG_OF */

 static struct mfd_cell s2mpb02_devs[] = {
 #ifdef	CONFIG_LEDS_S2MPB02
 	{ .name = "s2mpb02-led", },
 #endif /* CONFIG_LEDS_S2MPB02 */
 	{ .name = "s2mpb02-regulator", },
 };

 int s2mpb02_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest)
 {
 	struct s2mpb02_dev *s2mpb02 = i2c_get_clientdata(i2c);
 	int ret;

 	mutex_lock(&s2mpb02->i2c_lock);
 	ret = i2c_smbus_read_byte_data(i2c, reg);
 	mutex_unlock(&s2mpb02->i2c_lock);
 	if (ret < 0) {
 		pr_info("%s:%s reg(0x%x), ret(%d)\n",
 				MFD_DEV_NAME, __func__, reg, ret);
 		return ret;
 	}

 	ret &= 0xff;
 	*dest = ret;
 	return 0;
 }
 EXPORT_SYMBOL_GPL(s2mpb02_read_reg);

 int s2mpb02_bulk_read(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
 {
 	struct s2mpb02_dev *s2mpb02 = i2c_get_clientdata(i2c);
 	int ret;

 	mutex_lock(&s2mpb02->i2c_lock);
 	ret = i2c_smbus_read_i2c_block_data(i2c, reg, count, buf);
 	mutex_unlock(&s2mpb02->i2c_lock);
 	if (ret < 0)
 		return ret;

 	return 0;
 }
 EXPORT_SYMBOL_GPL(s2mpb02_bulk_read);

 int s2mpb02_write_reg(struct i2c_client *i2c, u8 reg, u8 value)
 {
 	struct s2mpb02_dev *s2mpb02 = i2c_get_clientdata(i2c);
 	int ret;

 	mutex_lock(&s2mpb02->i2c_lock);
 	ret = i2c_smbus_write_byte_data(i2c, reg, value);
 	mutex_unlock(&s2mpb02->i2c_lock);
 	if (ret < 0)
 		pr_info("%s:%s reg(0x%x), ret(%d)\n",
 				MFD_DEV_NAME, __func__, reg, ret);

 	return ret;
 }
 EXPORT_SYMBOL_GPL(s2mpb02_write_reg);

 int s2mpb02_bulk_write(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
 {
 	struct s2mpb02_dev *s2mpb02 = i2c_get_clientdata(i2c);
 	int ret;

 	mutex_lock(&s2mpb02->i2c_lock);
 	ret = i2c_smbus_write_i2c_block_data(i2c, reg, count, buf);
 	mutex_unlock(&s2mpb02->i2c_lock);
 	if (ret < 0)
 		return ret;

 	return 0;
 }
 EXPORT_SYMBOL_GPL(s2mpb02_bulk_write);

 int s2mpb02_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask)
 {
 	struct s2mpb02_dev *s2mpb02 = i2c_get_clientdata(i2c);
 	int ret;

 	mutex_lock(&s2mpb02->i2c_lock);
 	ret = i2c_smbus_read_byte_data(i2c, reg);
 	if (ret >= 0) {
 		u8 old_val = ret & 0xff;
 		u8 new_val = (val & mask) | (old_val & (~mask));
 		ret = i2c_smbus_write_byte_data(i2c, reg, new_val);
 	}
 	mutex_unlock(&s2mpb02->i2c_lock);
 	return ret;
 }
 EXPORT_SYMBOL_GPL(s2mpb02_update_reg);

 #ifdef	CONFIG_OF
 static int of_s2mpb02_dt(struct device *dev,
 		struct s2mpb02_platform_data *pdata)
 {
 	struct device_node *np_s2mpb02 = dev->of_node;

 	if (!np_s2mpb02)
 		return -EINVAL;

 	pdata->wakeup = of_property_read_bool(np_s2mpb02, "s2mpb02,wakeup");

 	return 0;
 }
 #else
 static int of_s2mpb02_dt(struct device *dev,
 		struct s2mpb02_platform_data *pdata)
 {
 	return 0;
 }
 #endif /* CONFIG_OF */

 static int s2mpb02_i2c_probe(struct i2c_client *i2c,
 				const struct i2c_device_id *dev_id)
 {
 	struct s2mpb02_dev *s2mpb02;
 	struct s2mpb02_platform_data *pdata = i2c->dev.platform_data;

 	int ret = 0;
 	u8 reg_data;

 	pr_info("%s:%s\n", MFD_DEV_NAME, __func__);

 	s2mpb02 = kzalloc(sizeof(struct s2mpb02_dev), GFP_KERNEL);
 	if (!s2mpb02) {
 		dev_err(&i2c->dev, "%s: Failed to alloc mem for s2mpb02\n",
 							__func__);
 		return -ENOMEM;
 	}

 	if (i2c->dev.of_node) {
 		pdata = devm_kzalloc(&i2c->dev,
 			sizeof(struct s2mpb02_platform_data), GFP_KERNEL);
 		if (!pdata) {
 			dev_err(&i2c->dev, "Failed to allocate memory\n");
 			ret = -ENOMEM;
 			goto err_pdata;
 		}

 		ret = of_s2mpb02_dt(&i2c->dev, pdata);
 		if (ret < 0) {
 			dev_err(&i2c->dev, "Failed to get device of_node\n");
 			goto err;
 		}

 		i2c->dev.platform_data = pdata;
 	} else
 		pdata = i2c->dev.platform_data;

 	s2mpb02->dev = &i2c->dev;
 	s2mpb02->i2c = i2c;
 	s2mpb02->irq = i2c->irq;
 	if (pdata) {
 		s2mpb02->pdata = pdata;

 		pdata->irq_base = irq_alloc_descs(-1, 600, S2MPB02_IRQ_NR, 0);
 		if (pdata->irq_base < 0) {
 			pr_err("%s:%s irq_alloc_descs Fail! ret(%d)\n",
 				MFD_DEV_NAME, __func__, pdata->irq_base);
 			ret = -EINVAL;
 			goto err;
 		} else {
 			s2mpb02->irq_base = pdata->irq_base;
 		}

 		s2mpb02->wakeup = pdata->wakeup;
 	} else {
 		ret = -EINVAL;
 		goto err;
 	}
 	mutex_init(&s2mpb02->i2c_lock);

 	i2c_set_clientdata(i2c, s2mpb02);

 	if (s2mpb02_read_reg(s2mpb02->i2c,
 			S2MPB02_REG_BST_CTRL2, &reg_data) < 0) {
 		pr_err("device not found on this channel!!\n");
 		ret = -ENODEV;
 	} else {
 		if (reg_data == 0x90) {
 			S2MPB02_PMIC_REV(s2mpb02) = 1;
 		} else
 			S2MPB02_PMIC_REV(s2mpb02) = 0;
 		pr_info("%s: device id 0x%x is found\n",
 				__func__, s2mpb02->rev_num);
 	}

 	ret = s2mpb02_irq_init(s2mpb02);
 	if (ret < 0)
 		goto err_irq_init;

 	ret = mfd_add_devices(s2mpb02->dev, -1, s2mpb02_devs,
 			ARRAY_SIZE(s2mpb02_devs), NULL, 0, NULL);
 	if (ret < 0)
 		goto err_irq_init;

 	device_init_wakeup(s2mpb02->dev, pdata->wakeup);

 	return ret;

 err_irq_init:
 	mutex_destroy(&s2mpb02->i2c_lock);
 err:
 	kfree(pdata);
 	s2mpb02_irq_exit(s2mpb02);
 err_pdata:
 	kfree(s2mpb02);

 	return ret;
 }

 static int s2mpb02_i2c_remove(struct i2c_client *i2c)
 {
 	struct s2mpb02_dev *s2mpb02 = i2c_get_clientdata(i2c);

 	mfd_remove_devices(s2mpb02->dev);
 	s2mpb02_irq_exit(s2mpb02);
 	mutex_destroy(&s2mpb02->i2c_lock);
 	kfree(s2mpb02);

 	return 0;
 }

 static const struct i2c_device_id s2mpb02_i2c_id[] = {
 	{ MFD_DEV_NAME, TYPE_S2MPB02 },
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, s2mpb02_i2c_id);

 #if defined(CONFIG_OF)
 static struct of_device_id s2mpb02_i2c_dt_ids[] = {
 	{ .compatible = "s2mpb02,s2mpb02mfd" },
 	{},
 };
 MODULE_DEVICE_TABLE(of, s2mpb02_i2c_dt_ids);
 #endif /* CONFIG_OF */

 #if defined(CONFIG_PM)
 static int s2mpb02_suspend(struct device *dev)
 {
 	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
 	struct s2mpb02_dev *s2mpb02 = i2c_get_clientdata(i2c);

 	if (device_may_wakeup(dev))
 		enable_irq_wake(s2mpb02->irq);

 	disable_irq(s2mpb02->irq);

 	return 0;
 }

 static int s2mpb02_resume(struct device *dev)
 {
 	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
 	struct s2mpb02_dev *s2mpb02 = i2c_get_clientdata(i2c);

 	if (device_may_wakeup(dev))
 		disable_irq_wake(s2mpb02->irq);

 	enable_irq(s2mpb02->irq);

 	return 0;
 }
 #else
 #define s2mpb02_suspend	NULL
 #define s2mpb02_resume	NULL
 #endif /* CONFIG_PM */

 const struct dev_pm_ops s2mpb02_pm = {
 	.suspend = s2mpb02_suspend,
 	.resume = s2mpb02_resume,
 };

 static struct i2c_driver s2mpb02_i2c_driver = {
 	.driver		= {
 		.name	= MFD_DEV_NAME,
 		.owner	= THIS_MODULE,
 #if defined(CONFIG_PM)
 		.pm	= &s2mpb02_pm,
 #endif /* CONFIG_PM */
 #if defined(CONFIG_OF)
 		.of_match_table	= s2mpb02_i2c_dt_ids,
 #endif /* CONFIG_OF */
 	},
 	.probe		= s2mpb02_i2c_probe,
 	.remove		= s2mpb02_i2c_remove,
 	.id_table	= s2mpb02_i2c_id,
 };

 static int __init s2mpb02_i2c_init(void)
 {
 	pr_info("%s:%s\n", MFD_DEV_NAME, __func__);
 	return i2c_add_driver(&s2mpb02_i2c_driver);
 }
 /* init early so consumer devices can complete system boot */
 subsys_initcall(s2mpb02_i2c_init);

 static void __exit s2mpb02_i2c_exit(void)
 {
 	i2c_del_driver(&s2mpb02_i2c_driver);
 }
 module_exit(s2mpb02_i2c_exit);

 MODULE_DESCRIPTION("SAMSUNG s2mpb02 multi-function core driver");
 MODULE_LICENSE("GPL");
	/*
	* s2mpb02-core.c - mfd core driver for the Samsung s2mpb02
	*
	* Copyright (C) 2014 Samsung Electronics
	*
	* 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.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	*
	* This driver is based on max77804.c
	*/

	#include <linux/module.h>
	#include <linux/slab.h>
	#include <linux/i2c.h>
	#include <linux/irq.h>
	#include <linux/interrupt.h>
	#include <linux/mutex.h>
	#include <linux/mfd/core.h>
	#include <linux/mfd/s2mpb02.h>
	#include <linux/mfd/s2mpb02-private.h>
	#include <linux/regulator/machine.h>

	#ifdef CONFIG_OF
	#include <linux/of_device.h>
	#include <linux/of_gpio.h>
	#endif /* CONFIG_OF */

	static struct mfd_cell s2mpb02_devs[] = {
	#ifdef CONFIG_LEDS_S2MPB02
	{ .name = "s2mpb02-led", },
	#endif /* CONFIG_LEDS_S2MPB02 */
	{ .name = "s2mpb02-regulator", },
	};

	int s2mpb02_read_reg(struct i2c_client i2c, u8 reg, u8 dest)
	{
	struct s2mpb02_dev *s2mpb02 = i2c_get_clientdata(i2c);
	int ret;

	mutex_lock(&s2mpb02->i2c_lock);
	ret = i2c_smbus_read_byte_data(i2c, reg);
	mutex_unlock(&s2mpb02->i2c_lock);
	if (ret < 0) {
	pr_info("%s:%s reg(0x%x), ret(%d)\n",
	MFD_DEV_NAME, __func__, reg, ret);
	return ret;
	}

	ret &= 0xff;
	*dest = ret;
	return 0;
	}
	EXPORT_SYMBOL_GPL(s2mpb02_read_reg);

	int s2mpb02_bulk_read(struct i2c_client i2c, u8 reg, int count, u8 buf)
	{
	struct s2mpb02_dev *s2mpb02 = i2c_get_clientdata(i2c);
	int ret;

	mutex_lock(&s2mpb02->i2c_lock);
	ret = i2c_smbus_read_i2c_block_data(i2c, reg, count, buf);
	mutex_unlock(&s2mpb02->i2c_lock);
	if (ret < 0)
	return ret;

	return 0;
	}
	EXPORT_SYMBOL_GPL(s2mpb02_bulk_read);

	int s2mpb02_write_reg(struct i2c_client *i2c, u8 reg, u8 value)
	{
	struct s2mpb02_dev *s2mpb02 = i2c_get_clientdata(i2c);
	int ret;

	mutex_lock(&s2mpb02->i2c_lock);
	ret = i2c_smbus_write_byte_data(i2c, reg, value);
	mutex_unlock(&s2mpb02->i2c_lock);
	if (ret < 0)
	pr_info("%s:%s reg(0x%x), ret(%d)\n",
	MFD_DEV_NAME, __func__, reg, ret);

	return ret;
	}
	EXPORT_SYMBOL_GPL(s2mpb02_write_reg);

	int s2mpb02_bulk_write(struct i2c_client i2c, u8 reg, int count, u8 buf)
	{
	struct s2mpb02_dev *s2mpb02 = i2c_get_clientdata(i2c);
	int ret;

	mutex_lock(&s2mpb02->i2c_lock);
	ret = i2c_smbus_write_i2c_block_data(i2c, reg, count, buf);
	mutex_unlock(&s2mpb02->i2c_lock);
	if (ret < 0)
	return ret;

	return 0;
	}
	EXPORT_SYMBOL_GPL(s2mpb02_bulk_write);

	int s2mpb02_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask)
	{
	struct s2mpb02_dev *s2mpb02 = i2c_get_clientdata(i2c);
	int ret;

	mutex_lock(&s2mpb02->i2c_lock);
	ret = i2c_smbus_read_byte_data(i2c, reg);
	if (ret >= 0) {
	u8 old_val = ret & 0xff;
	u8 new_val = (val & mask) \| (old_val & (~mask));
	ret = i2c_smbus_write_byte_data(i2c, reg, new_val);
	}
	mutex_unlock(&s2mpb02->i2c_lock);
	return ret;
	}
	EXPORT_SYMBOL_GPL(s2mpb02_update_reg);

	#ifdef CONFIG_OF
	static int of_s2mpb02_dt(struct device *dev,
	struct s2mpb02_platform_data *pdata)
	{
	struct device_node *np_s2mpb02 = dev->of_node;

	if (!np_s2mpb02)
	return -EINVAL;

	pdata->wakeup = of_property_read_bool(np_s2mpb02, "s2mpb02,wakeup");

	return 0;
	}
	#else
	static int of_s2mpb02_dt(struct device *dev,
	struct s2mpb02_platform_data *pdata)
	{
	return 0;
	}
	#endif /* CONFIG_OF */

	static int s2mpb02_i2c_probe(struct i2c_client *i2c,
	const struct i2c_device_id *dev_id)
	{
	struct s2mpb02_dev *s2mpb02;
	struct s2mpb02_platform_data *pdata = i2c->dev.platform_data;

	int ret = 0;
	u8 reg_data;

	pr_info("%s:%s\n", MFD_DEV_NAME, __func__);

	s2mpb02 = kzalloc(sizeof(struct s2mpb02_dev), GFP_KERNEL);
	if (!s2mpb02) {
	dev_err(&i2c->dev, "%s: Failed to alloc mem for s2mpb02\n",
	__func__);
	return -ENOMEM;
	}

	if (i2c->dev.of_node) {
	pdata = devm_kzalloc(&i2c->dev,
	sizeof(struct s2mpb02_platform_data), GFP_KERNEL);
	if (!pdata) {
	dev_err(&i2c->dev, "Failed to allocate memory\n");
	ret = -ENOMEM;
	goto err_pdata;
	}

	ret = of_s2mpb02_dt(&i2c->dev, pdata);
	if (ret < 0) {
	dev_err(&i2c->dev, "Failed to get device of_node\n");
	goto err;
	}

	i2c->dev.platform_data = pdata;
	} else
	pdata = i2c->dev.platform_data;

	s2mpb02->dev = &i2c->dev;
	s2mpb02->i2c = i2c;
	s2mpb02->irq = i2c->irq;
	if (pdata) {
	s2mpb02->pdata = pdata;

	pdata->irq_base = irq_alloc_descs(-1, 600, S2MPB02_IRQ_NR, 0);
	if (pdata->irq_base < 0) {
	pr_err("%s:%s irq_alloc_descs Fail! ret(%d)\n",
	MFD_DEV_NAME, __func__, pdata->irq_base);
	ret = -EINVAL;
	goto err;
	} else {
	s2mpb02->irq_base = pdata->irq_base;
	}

	s2mpb02->wakeup = pdata->wakeup;
	} else {
	ret = -EINVAL;
	goto err;
	}
	mutex_init(&s2mpb02->i2c_lock);

	i2c_set_clientdata(i2c, s2mpb02);

	if (s2mpb02_read_reg(s2mpb02->i2c,
	S2MPB02_REG_BST_CTRL2, &reg_data) < 0) {
	pr_err("device not found on this channel!!\n");
	ret = -ENODEV;
	} else {
	if (reg_data == 0x90) {
	S2MPB02_PMIC_REV(s2mpb02) = 1;
	} else
	S2MPB02_PMIC_REV(s2mpb02) = 0;
	pr_info("%s: device id 0x%x is found\n",
	__func__, s2mpb02->rev_num);
	}

	ret = s2mpb02_irq_init(s2mpb02);
	if (ret < 0)
	goto err_irq_init;

	ret = mfd_add_devices(s2mpb02->dev, -1, s2mpb02_devs,
	ARRAY_SIZE(s2mpb02_devs), NULL, 0, NULL);
	if (ret < 0)
	goto err_irq_init;

	device_init_wakeup(s2mpb02->dev, pdata->wakeup);

	return ret;

	err_irq_init:
	mutex_destroy(&s2mpb02->i2c_lock);
	err:
	kfree(pdata);
	s2mpb02_irq_exit(s2mpb02);
	err_pdata:
	kfree(s2mpb02);

	return ret;
	}

	static int s2mpb02_i2c_remove(struct i2c_client *i2c)
	{
	struct s2mpb02_dev *s2mpb02 = i2c_get_clientdata(i2c);

	mfd_remove_devices(s2mpb02->dev);
	s2mpb02_irq_exit(s2mpb02);
	mutex_destroy(&s2mpb02->i2c_lock);
	kfree(s2mpb02);

	return 0;
	}

	static const struct i2c_device_id s2mpb02_i2c_id[] = {
	{ MFD_DEV_NAME, TYPE_S2MPB02 },
	{ }
	};
	MODULE_DEVICE_TABLE(i2c, s2mpb02_i2c_id);

	#if defined(CONFIG_OF)
	static struct of_device_id s2mpb02_i2c_dt_ids[] = {
	{ .compatible = "s2mpb02,s2mpb02mfd" },
	{},
	};
	MODULE_DEVICE_TABLE(of, s2mpb02_i2c_dt_ids);
	#endif /* CONFIG_OF */

	#if defined(CONFIG_PM)
	static int s2mpb02_suspend(struct device *dev)
	{
	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
	struct s2mpb02_dev *s2mpb02 = i2c_get_clientdata(i2c);

	if (device_may_wakeup(dev))
	enable_irq_wake(s2mpb02->irq);

	disable_irq(s2mpb02->irq);

	return 0;
	}

	static int s2mpb02_resume(struct device *dev)
	{
	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
	struct s2mpb02_dev *s2mpb02 = i2c_get_clientdata(i2c);

	if (device_may_wakeup(dev))
	disable_irq_wake(s2mpb02->irq);

	enable_irq(s2mpb02->irq);

	return 0;
	}
	#else
	#define s2mpb02_suspend NULL
	#define s2mpb02_resume NULL
	#endif /* CONFIG_PM */

	const struct dev_pm_ops s2mpb02_pm = {
	.suspend = s2mpb02_suspend,
	.resume = s2mpb02_resume,
	};

	static struct i2c_driver s2mpb02_i2c_driver = {
	.driver = {
	.name = MFD_DEV_NAME,
	.owner = THIS_MODULE,
	#if defined(CONFIG_PM)
	.pm = &s2mpb02_pm,
	#endif /* CONFIG_PM */
	#if defined(CONFIG_OF)
	.of_match_table = s2mpb02_i2c_dt_ids,
	#endif /* CONFIG_OF */
	},
	.probe = s2mpb02_i2c_probe,
	.remove = s2mpb02_i2c_remove,
	.id_table = s2mpb02_i2c_id,
	};

	static int __init s2mpb02_i2c_init(void)
	{
	pr_info("%s:%s\n", MFD_DEV_NAME, __func__);
	return i2c_add_driver(&s2mpb02_i2c_driver);
	}
	/* init early so consumer devices can complete system boot */
	subsys_initcall(s2mpb02_i2c_init);

	static void __exit s2mpb02_i2c_exit(void)
	{
	i2c_del_driver(&s2mpb02_i2c_driver);
	}
	module_exit(s2mpb02_i2c_exit);

	MODULE_DESCRIPTION("SAMSUNG s2mpb02 multi-function core driver");
	MODULE_LICENSE("GPL");