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-rw-r--r--drivers/mfd/Kconfig10
-rw-r--r--drivers/mfd/Makefile1
-rw-r--r--drivers/mfd/ab8500-core.c4
-rw-r--r--drivers/mfd/max8998.c158
4 files changed, 172 insertions, 1 deletions
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index d75909e7cf2f..db51ea1c6082 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -293,6 +293,16 @@ config MFD_MAX8925
accessing the device, additional drivers must be enabled in order
to use the functionality of the device.
+config MFD_MAX8998
+ bool "Maxim Semiconductor MAX8998 PMIC Support"
+ depends on I2C=y
+ select MFD_CORE
+ help
+ Say yes here to support for Maxim Semiconductor MAX8998. This is
+ a Power Management IC. This driver provies common support for
+ accessing the device, additional drivers must be enabled in order
+ to use the functionality of the device.
+
config MFD_WM8400
tristate "Support Wolfson Microelectronics WM8400"
select MFD_CORE
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 1e48d7e3e884..feaeeaeeddb7 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -58,6 +58,7 @@ obj-$(CONFIG_UCB1400_CORE) += ucb1400_core.o
obj-$(CONFIG_PMIC_DA903X) += da903x.o
max8925-objs := max8925-core.o max8925-i2c.o
obj-$(CONFIG_MFD_MAX8925) += max8925.o
+obj-$(CONFIG_MFD_MAX8998) += max8998.o
pcf50633-objs := pcf50633-core.o pcf50633-irq.o
obj-$(CONFIG_MFD_PCF50633) += pcf50633.o
diff --git a/drivers/mfd/ab8500-core.c b/drivers/mfd/ab8500-core.c
index f3d26fa9c34d..defa786dee34 100644
--- a/drivers/mfd/ab8500-core.c
+++ b/drivers/mfd/ab8500-core.c
@@ -16,6 +16,7 @@
#include <linux/platform_device.h>
#include <linux/mfd/core.h>
#include <linux/mfd/ab8500.h>
+#include <linux/regulator/ab8500.h>
/*
* Interrupt register offsets
@@ -352,6 +353,7 @@ static struct mfd_cell ab8500_devs[] = {
{ .name = "ab8500-audio", },
{ .name = "ab8500-usb", },
{ .name = "ab8500-pwm", },
+ { .name = "ab8500-regulator", },
};
int __devinit ab8500_init(struct ab8500 *ab8500)
@@ -411,7 +413,7 @@ int __devinit ab8500_init(struct ab8500 *ab8500)
goto out_removeirq;
}
- ret = mfd_add_devices(ab8500->dev, -1, ab8500_devs,
+ ret = mfd_add_devices(ab8500->dev, 0, ab8500_devs,
ARRAY_SIZE(ab8500_devs), NULL,
ab8500->irq_base);
if (ret)
diff --git a/drivers/mfd/max8998.c b/drivers/mfd/max8998.c
new file mode 100644
index 000000000000..73e6f5c4efc9
--- /dev/null
+++ b/drivers/mfd/max8998.c
@@ -0,0 +1,158 @@
+/*
+ * max8698.c - mfd core driver for the Maxim 8998
+ *
+ * Copyright (C) 2009-2010 Samsung Electronics
+ * Kyungmin Park <kyungmin.park@samsung.com>
+ * Marek Szyprowski <m.szyprowski@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.
+ *
+ * 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
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/mutex.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/max8998.h>
+#include <linux/mfd/max8998-private.h>
+
+static struct mfd_cell max8998_devs[] = {
+ {
+ .name = "max8998-pmic",
+ }
+};
+
+static int max8998_i2c_device_read(struct max8998_dev *max8998, u8 reg, u8 *dest)
+{
+ struct i2c_client *client = max8998->i2c_client;
+ int ret;
+
+ mutex_lock(&max8998->iolock);
+ ret = i2c_smbus_read_byte_data(client, reg);
+ mutex_unlock(&max8998->iolock);
+ if (ret < 0)
+ return ret;
+
+ ret &= 0xff;
+ *dest = ret;
+ return 0;
+}
+
+static int max8998_i2c_device_write(struct max8998_dev *max8998, u8 reg, u8 value)
+{
+ struct i2c_client *client = max8998->i2c_client;
+ int ret;
+
+ mutex_lock(&max8998->iolock);
+ ret = i2c_smbus_write_byte_data(client, reg, value);
+ mutex_unlock(&max8998->iolock);
+ return ret;
+}
+
+static int max8998_i2c_device_update(struct max8998_dev *max8998, u8 reg,
+ u8 val, u8 mask)
+{
+ struct i2c_client *client = max8998->i2c_client;
+ int ret;
+
+ mutex_lock(&max8998->iolock);
+ ret = i2c_smbus_read_byte_data(client, reg);
+ if (ret >= 0) {
+ u8 old_val = ret & 0xff;
+ u8 new_val = (val & mask) | (old_val & (~mask));
+ ret = i2c_smbus_write_byte_data(client, reg, new_val);
+ if (ret >= 0)
+ ret = 0;
+ }
+ mutex_unlock(&max8998->iolock);
+ return ret;
+}
+
+static int max8998_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ struct max8998_dev *max8998;
+ int ret = 0;
+
+ max8998 = kzalloc(sizeof(struct max8998_dev), GFP_KERNEL);
+ if (max8998 == NULL)
+ return -ENOMEM;
+
+ i2c_set_clientdata(i2c, max8998);
+ max8998->dev = &i2c->dev;
+ max8998->i2c_client = i2c;
+ max8998->dev_read = max8998_i2c_device_read;
+ max8998->dev_write = max8998_i2c_device_write;
+ max8998->dev_update = max8998_i2c_device_update;
+ mutex_init(&max8998->iolock);
+
+ ret = mfd_add_devices(max8998->dev, -1,
+ max8998_devs, ARRAY_SIZE(max8998_devs),
+ NULL, 0);
+ if (ret < 0)
+ goto err;
+
+ return ret;
+
+err:
+ mfd_remove_devices(max8998->dev);
+ kfree(max8998);
+ return ret;
+}
+
+static int max8998_i2c_remove(struct i2c_client *i2c)
+{
+ struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
+
+ mfd_remove_devices(max8998->dev);
+ kfree(max8998);
+
+ return 0;
+}
+
+static const struct i2c_device_id max8998_i2c_id[] = {
+ { "max8998", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, max8998_i2c_id);
+
+static struct i2c_driver max8998_i2c_driver = {
+ .driver = {
+ .name = "max8998",
+ .owner = THIS_MODULE,
+ },
+ .probe = max8998_i2c_probe,
+ .remove = max8998_i2c_remove,
+ .id_table = max8998_i2c_id,
+};
+
+static int __init max8998_i2c_init(void)
+{
+ return i2c_add_driver(&max8998_i2c_driver);
+}
+/* init early so consumer devices can complete system boot */
+subsys_initcall(max8998_i2c_init);
+
+static void __exit max8998_i2c_exit(void)
+{
+ i2c_del_driver(&max8998_i2c_driver);
+}
+module_exit(max8998_i2c_exit);
+
+MODULE_DESCRIPTION("MAXIM 8998 multi-function core driver");
+MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>");
+MODULE_LICENSE("GPL");