samsung update 1

1 files changed, 407 insertions, 0 deletions

diff --git a/drivers/mfd/max77686.c b/drivers/mfd/max77686.c
new file mode 100644
index 0000000..9f5004d
--- /dev/null
+++ b/drivers/mfd/max77686.c
@@ -0,0 +1,407 @@
+/*
+ * max77686.c - mfd core driver for the Maxim 77686
+ *
+ * Copyright (C) 2011 Samsung Electronics
+ * Chiwoong Byun <woong.byun@smasung.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.
+ *
+ * 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 max8997.c
+ */
+
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/pm_runtime.h>
+#include <linux/mutex.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/max77686.h>
+#include <linux/mfd/max77686-private.h>
+#include <linux/interrupt.h>
+
+#define I2C_ADDR_RTC	(0x0C >> 1)
+
+static struct mfd_cell max77686_devs[] = {
+	{ .name = "max77686-pmic", },
+#ifdef CONFIG_RTC_DRV_MAX77686
+	{ .name = "max77686-rtc", },
+#endif
+};
+
+int max77686_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest)
+{
+	struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
+	int ret;
+
+	mutex_lock(&max77686->iolock);
+	ret = i2c_smbus_read_byte_data(i2c, reg);
+	mutex_unlock(&max77686->iolock);
+	if (ret < 0)
+		return ret;
+
+	ret &= 0xff;
+	*dest = ret;
+	return 0;
+}
+EXPORT_SYMBOL_GPL(max77686_read_reg);
+
+int max77686_bulk_read(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
+{
+	struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
+	int ret;
+
+	mutex_lock(&max77686->iolock);
+	ret = i2c_smbus_read_i2c_block_data(i2c, reg, count, buf);
+	mutex_unlock(&max77686->iolock);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(max77686_bulk_read);
+
+int max77686_write_reg(struct i2c_client *i2c, u8 reg, u8 value)
+{
+	struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
+	int ret;
+
+	mutex_lock(&max77686->iolock);
+	ret = i2c_smbus_write_byte_data(i2c, reg, value);
+	mutex_unlock(&max77686->iolock);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(max77686_write_reg);
+
+int max77686_bulk_write(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
+{
+	struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
+	int ret;
+
+	mutex_lock(&max77686->iolock);
+	ret = i2c_smbus_write_i2c_block_data(i2c, reg, count, buf);
+	mutex_unlock(&max77686->iolock);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(max77686_bulk_write);
+
+int max77686_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask)
+{
+	struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
+	int ret;
+
+	mutex_lock(&max77686->iolock);
+	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(&max77686->iolock);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(max77686_update_reg);
+
+static int max77686_i2c_probe(struct i2c_client *i2c,
+			      const struct i2c_device_id *id)
+{
+	struct max77686_dev *max77686;
+	struct max77686_platform_data *pdata = i2c->dev.platform_data;
+	u8 data;
+	int ret = 0;
+
+	max77686 = kzalloc(sizeof(struct max77686_dev), GFP_KERNEL);
+	if (max77686 == NULL)
+		return -ENOMEM;
+
+	i2c_set_clientdata(i2c, max77686);
+	max77686->dev = &i2c->dev;
+	max77686->i2c = i2c;
+	max77686->type = id->driver_data;
+
+	if (!pdata) {
+		ret = -EIO;
+		goto err;
+	}
+
+	max77686->wakeup = pdata->wakeup;
+	max77686->irq_gpio = pdata->irq_gpio;
+	max77686->irq_base = pdata->irq_base;
+	max77686->wtsr_smpl = pdata->wtsr_smpl;
+
+	mutex_init(&max77686->iolock);
+
+	if (max77686_read_reg(i2c, MAX77686_REG_DEVICE_ID, &data) < 0) {
+		dev_err(max77686->dev,
+			"device not found on this channel (this is not an error)\n");
+		ret = -ENODEV;
+		goto err;
+	} else
+		dev_info(max77686->dev, "device found\n");
+
+#ifdef CONFIG_RTC_DRV_MAX77686
+	max77686->rtc = i2c_new_dummy(i2c->adapter, I2C_ADDR_RTC);
+	i2c_set_clientdata(max77686->rtc, max77686);
+#endif
+
+	max77686_irq_init(max77686);
+
+	ret = mfd_add_devices(max77686->dev, -1, max77686_devs,
+			      ARRAY_SIZE(max77686_devs), NULL, 0);
+
+	if (ret < 0)
+		goto err_mfd;
+
+	device_init_wakeup(max77686->dev, pdata->wakeup);
+
+	return ret;
+
+err_mfd:
+	mfd_remove_devices(max77686->dev);
+#ifdef CONFIG_RTC_DRV_MAX77686
+	i2c_unregister_device(max77686->rtc);
+#endif
+err:
+	kfree(max77686);
+	return ret;
+}
+
+static int max77686_i2c_remove(struct i2c_client *i2c)
+{
+	struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
+
+	mfd_remove_devices(max77686->dev);
+#ifdef CONFIG_RTC_DRV_MAX77686
+	i2c_unregister_device(max77686->rtc);
+#endif
+	kfree(max77686);
+
+	return 0;
+}
+
+static const struct i2c_device_id max77686_i2c_id[] = {
+	{ "max77686", TYPE_MAX77686 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, max77686_i2c_id);
+
+#ifdef CONFIG_PM
+static int max77686_suspend(struct device *dev)
+{
+	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
+	struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
+
+	disable_irq(max77686->irq);
+
+	if (device_may_wakeup(dev))
+		enable_irq_wake(max77686->irq);
+
+	return 0;
+}
+
+static int max77686_resume(struct device *dev)
+{
+	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
+	struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
+
+	if (device_may_wakeup(dev))
+		disable_irq_wake(max77686->irq);
+
+	enable_irq(max77686->irq);
+
+	return max77686_irq_resume(max77686);
+}
+#else
+#define max77686_suspend	NULL
+#define max77686_resume		NULL
+#endif /* CONFIG_PM */
+
+#ifdef CONFIG_HIBERNATION
+
+u8 max77686_dumpaddr_pmic[] = {
+	MAX77686_REG_INT1MSK,
+	MAX77686_REG_INT2MSK,
+	MAX77686_REG_ONOFF_DELAY,
+	MAX77686_REG_MRSTB	,
+	/* Reserved: 0x0B-0x0F */
+	MAX77686_REG_BUCK1CTRL,
+	MAX77686_REG_BUCK1OUT,
+	MAX77686_REG_BUCK2CTRL1,
+	MAX77686_REG_BUCK234FREQ,
+	MAX77686_REG_BUCK2DVS1,
+	MAX77686_REG_BUCK2DVS2,
+	MAX77686_REG_BUCK2DVS3,
+	MAX77686_REG_BUCK2DVS4,
+	MAX77686_REG_BUCK2DVS5,
+	MAX77686_REG_BUCK2DVS6,
+	MAX77686_REG_BUCK2DVS7,
+	MAX77686_REG_BUCK2DVS8,
+	MAX77686_REG_BUCK3CTRL1,
+	/* Reserved: 0x1D */
+	MAX77686_REG_BUCK3DVS1,
+	MAX77686_REG_BUCK3DVS2,
+	MAX77686_REG_BUCK3DVS3,
+	MAX77686_REG_BUCK3DVS4,
+	MAX77686_REG_BUCK3DVS5,
+	MAX77686_REG_BUCK3DVS6,
+	MAX77686_REG_BUCK3DVS7,
+	MAX77686_REG_BUCK3DVS8,
+	MAX77686_REG_BUCK4CTRL1,
+	/* Reserved: 0x27 */
+	MAX77686_REG_BUCK4DVS1,
+	MAX77686_REG_BUCK4DVS2,
+	MAX77686_REG_BUCK4DVS3,
+	MAX77686_REG_BUCK4DVS4,
+	MAX77686_REG_BUCK4DVS5,
+	MAX77686_REG_BUCK4DVS6,
+	MAX77686_REG_BUCK4DVS7,
+	MAX77686_REG_BUCK4DVS8,
+	MAX77686_REG_BUCK5CTRL,
+	MAX77686_REG_BUCK5OUT,
+	MAX77686_REG_BUCK6CTRL,
+	MAX77686_REG_BUCK6OUT,
+	MAX77686_REG_BUCK7CTRL,
+	MAX77686_REG_BUCK7OUT,
+	MAX77686_REG_BUCK8CTRL,
+	MAX77686_REG_BUCK8OUT,
+	MAX77686_REG_BUCK9CTRL,
+	MAX77686_REG_BUCK9OUT,
+	/* Reserved: 0x3A-0x3F */
+	MAX77686_REG_LDO1CTRL1	,
+	MAX77686_REG_LDO2CTRL1	,
+	MAX77686_REG_LDO3CTRL1	,
+	MAX77686_REG_LDO4CTRL1	,
+	MAX77686_REG_LDO5CTRL1	,
+	MAX77686_REG_LDO6CTRL1,
+	MAX77686_REG_LDO7CTRL1	,
+	MAX77686_REG_LDO8CTRL1	,
+	MAX77686_REG_LDO9CTRL1	,
+	MAX77686_REG_LDO10CTRL1,
+	MAX77686_REG_LDO11CTRL1,
+	MAX77686_REG_LDO12CTRL1,
+	MAX77686_REG_LDO13CTRL1,
+	MAX77686_REG_LDO14CTRL1,
+	MAX77686_REG_LDO15CTRL1,
+	MAX77686_REG_LDO16CTRL1,
+	MAX77686_REG_LDO17CTRL1,
+	MAX77686_REG_LDO18CTRL1,
+	MAX77686_REG_LDO19CTRL1,
+	MAX77686_REG_LDO20CTRL1,
+	MAX77686_REG_LDO21CTRL1,
+	MAX77686_REG_LDO22CTRL1,
+	MAX77686_REG_LDO23CTRL1,
+	MAX77686_REG_LDO24CTRL1,
+	MAX77686_REG_LDO25CTRL1,
+	MAX77686_REG_LDO26CTRL1,
+	/* Reserved: 0x5A-0x5F */
+	MAX77686_REG_LDO1CTRL2	,
+	MAX77686_REG_LDO2CTRL2	,
+	MAX77686_REG_LDO3CTRL2	,
+	MAX77686_REG_LDO4CTRL2	,
+	MAX77686_REG_LDO5CTRL2	,
+	MAX77686_REG_LDO6CTRL2,
+	MAX77686_REG_LDO7CTRL2	,
+	MAX77686_REG_LDO8CTRL2	,
+	MAX77686_REG_LDO9CTRL2	,
+	MAX77686_REG_LDO10CTRL2,
+	MAX77686_REG_LDO11CTRL2,
+	MAX77686_REG_LDO12CTRL2,
+	MAX77686_REG_LDO13CTRL2,
+	MAX77686_REG_LDO14CTRL2,
+	MAX77686_REG_LDO15CTRL2,
+	MAX77686_REG_LDO16CTRL2,
+	MAX77686_REG_LDO17CTRL2,
+	MAX77686_REG_LDO18CTRL2,
+	MAX77686_REG_LDO19CTRL2,
+	MAX77686_REG_LDO20CTRL2,
+	MAX77686_REG_LDO21CTRL2,
+	MAX77686_REG_LDO22CTRL2,
+	MAX77686_REG_LDO23CTRL2,
+	MAX77686_REG_LDO24CTRL2,
+	MAX77686_REG_LDO25CTRL2,
+	MAX77686_REG_LDO26CTRL2,
+	MAX77686_REG_BBAT_CHG,
+	MAX77686_REG_32KHZ,
+};
+
+static int max77686_freeze(struct device *dev)
+{
+	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
+	struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(max77686_dumpaddr_pmic); i++)
+		max77686_read_reg(i2c, max77686_dumpaddr_pmic[i],
+				&max77686->reg_dump[i]);
+
+	disable_irq(max77686->irq);
+
+	return 0;
+}
+
+static int max77686_restore(struct device *dev)
+{
+	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
+	struct max77686_dev *max77686 = i2c_get_clientdata(i2c);
+	int i;
+
+	enable_irq(max77686->irq);
+
+	for (i = 0; i < ARRAY_SIZE(max77686_dumpaddr_pmic); i++)
+		max77686_write_reg(i2c, max77686_dumpaddr_pmic[i],
+				max77686->reg_dump[i]);
+
+	return 0;
+}
+#endif
+
+const struct dev_pm_ops max77686_pm = {
+	.suspend = max77686_suspend,
+	.resume = max77686_resume,
+#ifdef CONFIG_HIBERNATION
+	.freeze =  max77686_freeze,
+	.thaw = max77686_restore,
+	.restore = max77686_restore,
+#endif
+};
+
+static struct i2c_driver max77686_i2c_driver = {
+	.driver = {
+		.name = "max77686",
+		.owner = THIS_MODULE,
+		.pm = &max77686_pm,
+	},
+	.probe = max77686_i2c_probe,
+	.remove = max77686_i2c_remove,
+	.id_table = max77686_i2c_id,
+};
+
+static int __init max77686_i2c_init(void)
+{
+	return i2c_add_driver(&max77686_i2c_driver);
+}
+/* init early so consumer devices can complete system boot */
+subsys_initcall(max77686_i2c_init);
+
+static void __exit max77686_i2c_exit(void)
+{
+	i2c_del_driver(&max77686_i2c_driver);
+}
+module_exit(max77686_i2c_exit);
+
+MODULE_DESCRIPTION("MAXIM 77686 multi-function core driver");
+MODULE_AUTHOR("Chiwoong Byun <woong.byun@samsung.com>");
+MODULE_LICENSE("GPL");