drivers: regulator: add Maxim 8998 driver
Kyungmin Park [Wed, 16 Jun 2010 07:04:16 +0000 (09:04 +0200)]
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

This patch adds voltage regulator driver for Maxim 8998 chip. This chip
is used on Samsung Aquila and GONI boards and provides following
functionalities:
- 4 BUCK voltage converters, 17 LDO power regulators and 5 other power
  controllers
- battery charger

This patch adds basic driver for voltage regulators and MAX 8998 MFD core.

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>

drivers/mfd/Kconfig
drivers/mfd/Makefile
drivers/mfd/max8998.c [new file with mode: 0644]
drivers/regulator/Kconfig
drivers/regulator/Makefile
drivers/regulator/max8998.c [new file with mode: 0644]
include/linux/mfd/max8998-private.h [new file with mode: 0644]
include/linux/mfd/max8998.h [new file with mode: 0644]

index 9da0e50..ad61a9e 100644 (file)
@@ -252,6 +252,16 @@ 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
index fb503e7..a362ccf 100644 (file)
@@ -56,6 +56,7 @@ 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/max8998.c b/drivers/mfd/max8998.c
new file mode 100644 (file)
index 0000000..0d68de2
--- /dev/null
@@ -0,0 +1,160 @@
+/*
+ * 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) {
+               kfree(i2c);
+               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");
index 6bf56c9..671b81a 100644 (file)
@@ -100,6 +100,15 @@ config REGULATOR_MAX8925
        help
          Say y here to support the voltage regulaltor of Maxim MAX8925 PMIC.
 
+config REGULATOR_MAX8998
+       tristate "Maxim 8998 voltage regulator"
+       depends on I2C
+       default n
+       help
+         This driver controls a Maxim 8998 voltage output regulator
+         via I2C bus. The provided regulator is suitable for S3C6410
+         and S5PC1XX chips to control VCC_CORE and VCC_USIM voltages.
+
 config REGULATOR_TWL4030
        bool "TI TWL4030/TWL5030/TWL6030/TPS695x0 PMIC"
        depends on TWL4030_CORE
index 451a14a..74a4638 100644 (file)
@@ -17,6 +17,7 @@ obj-$(CONFIG_REGULATOR_TWL4030) += twl-regulator.o
 obj-$(CONFIG_REGULATOR_MAX8649)        += max8649.o
 obj-$(CONFIG_REGULATOR_MAX8660) += max8660.o
 obj-$(CONFIG_REGULATOR_MAX8925) += max8925-regulator.o
+obj-$(CONFIG_REGULATOR_MAX8998) += max8998.o
 obj-$(CONFIG_REGULATOR_WM831X) += wm831x-dcdc.o
 obj-$(CONFIG_REGULATOR_WM831X) += wm831x-isink.o
 obj-$(CONFIG_REGULATOR_WM831X) += wm831x-ldo.o
diff --git a/drivers/regulator/max8998.c b/drivers/regulator/max8998.c
new file mode 100644 (file)
index 0000000..174fd19
--- /dev/null
@@ -0,0 +1,610 @@
+/*
+ * max8998.c - Voltage regulator 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/init.h>
+#include <linux/i2c.h>
+#include <linux/err.h>
+#include <linux/gpio.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/mutex.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/mfd/max8998.h>
+#include <linux/mfd/max8998-private.h>
+
+struct max8998_data {
+       struct device           *dev;
+       struct max8998_dev      *iodev;
+       int                     num_regulators;
+       struct regulator_dev    **rdev;
+};
+
+struct voltage_map_desc {
+       int min;
+       int max;
+       int step;
+};
+
+/* Voltage maps */
+static const struct voltage_map_desc ldo23_voltage_map_desc = {
+       .min = 800,     .step = 50,     .max = 1300,
+};
+static const struct voltage_map_desc ldo456711_voltage_map_desc = {
+       .min = 1600,    .step = 100,    .max = 3600,
+};
+static const struct voltage_map_desc ldo8_voltage_map_desc = {
+       .min = 3000,    .step = 100,    .max = 3600,
+};
+static const struct voltage_map_desc ldo9_voltage_map_desc = {
+       .min = 2800,    .step = 100,    .max = 3100,
+};
+static const struct voltage_map_desc ldo10_voltage_map_desc = {
+       .min = 950,     .step = 50,     .max = 1300,
+};
+static const struct voltage_map_desc ldo1213_voltage_map_desc = {
+       .min = 800,     .step = 100,    .max = 3300,
+};
+static const struct voltage_map_desc ldo1415_voltage_map_desc = {
+       .min = 1200,    .step = 100,    .max = 3300,
+};
+static const struct voltage_map_desc ldo1617_voltage_map_desc = {
+       .min = 1600,    .step = 100,    .max = 3600,
+};
+static const struct voltage_map_desc buck12_voltage_map_desc = {
+       .min = 750,     .step = 25,     .max = 1525,
+};
+static const struct voltage_map_desc buck3_voltage_map_desc = {
+       .min = 1600,    .step = 100,    .max = 3600,
+};
+static const struct voltage_map_desc buck4_voltage_map_desc = {
+       .min = 800,     .step = 100,    .max = 2300,
+};
+
+static const struct voltage_map_desc *ldo_voltage_map[] = {
+       NULL,
+       NULL,
+       &ldo23_voltage_map_desc,        /* LDO2 */
+       &ldo23_voltage_map_desc,        /* LDO3 */
+       &ldo456711_voltage_map_desc,    /* LDO4 */
+       &ldo456711_voltage_map_desc,    /* LDO5 */
+       &ldo456711_voltage_map_desc,    /* LDO6 */
+       &ldo456711_voltage_map_desc,    /* LDO7 */
+       &ldo8_voltage_map_desc,         /* LDO8 */
+       &ldo9_voltage_map_desc,         /* LDO9 */
+       &ldo10_voltage_map_desc,        /* LDO10 */
+       &ldo456711_voltage_map_desc,    /* LDO11 */
+       &ldo1213_voltage_map_desc,      /* LDO12 */
+       &ldo1213_voltage_map_desc,      /* LDO13 */
+       &ldo1415_voltage_map_desc,      /* LDO14 */
+       &ldo1415_voltage_map_desc,      /* LDO15 */
+       &ldo1617_voltage_map_desc,      /* LDO16 */
+       &ldo1617_voltage_map_desc,      /* LDO17 */
+       &buck12_voltage_map_desc,       /* BUCK1 */
+       &buck12_voltage_map_desc,       /* BUCK2 */
+       &buck3_voltage_map_desc,        /* BUCK3 */
+       &buck4_voltage_map_desc,        /* BUCK4 */
+};
+
+static inline int max8998_get_ldo(struct regulator_dev *rdev)
+{
+       return rdev_get_id(rdev);
+}
+
+static int max8998_list_voltage(struct regulator_dev *rdev,
+                               unsigned int selector)
+{
+       const struct voltage_map_desc *desc;
+       int ldo = max8998_get_ldo(rdev);
+       int val;
+
+       if (ldo > ARRAY_SIZE(ldo_voltage_map))
+               return -EINVAL;
+
+       desc = ldo_voltage_map[ldo];
+       if (desc == NULL)
+               return -EINVAL;
+
+       val = desc->min + desc->step * selector;
+       if (val > desc->max)
+               return -EINVAL;
+
+       return val * 1000;
+}
+
+static int max8998_get_enable_register(struct regulator_dev *rdev,
+                                       int *reg, int *shift)
+{
+       int ldo = max8998_get_ldo(rdev);
+
+       switch (ldo) {
+       case MAX8998_LDO2 ... MAX8998_LDO5:
+               *reg = MAX8998_REG_ONOFF1;
+               *shift = 3 - (ldo - MAX8998_LDO2);
+               break;
+       case MAX8998_LDO6 ... MAX8998_LDO13:
+               *reg = MAX8998_REG_ONOFF2;
+               *shift = 7 - (ldo - MAX8998_LDO6);
+               break;
+       case MAX8998_LDO14 ... MAX8998_LDO17:
+               *reg = MAX8998_REG_ONOFF3;
+               *shift = 7 - (ldo - MAX8998_LDO14);
+               break;
+       case MAX8998_BUCK1 ... MAX8998_BUCK4:
+               *reg = MAX8998_REG_ONOFF1;
+               *shift = 7 - (ldo - MAX8998_BUCK1);
+               break;
+       case MAX8998_EN32KHZ_AP ... MAX8998_ENVICHG:
+               *reg = MAX8998_REG_ONOFF4;
+               *shift = 7 - (ldo - MAX8998_EN32KHZ_AP);
+               break;
+       case MAX8998_ESAFEOUT1 ... MAX8998_ESAFEOUT2:
+               *reg = MAX8998_REG_CHGR2;
+               *shift = 7 - (ldo - MAX8998_ESAFEOUT1);
+               break;
+       default:
+               return -EINVAL;
+       }
+
+       return 0;
+}
+
+static int max8998_ldo_is_enabled(struct regulator_dev *rdev)
+{
+       struct max8998_data *max8998 = rdev_get_drvdata(rdev);
+       int ret, reg, shift = 8;
+       u8 val;
+
+       ret = max8998_get_enable_register(rdev, &reg, &shift);
+       if (ret)
+               return ret;
+
+       ret = max8998_read_reg(max8998->iodev, reg, &val);
+       if (ret)
+               return ret;
+
+       return val & (1 << shift);
+}
+
+static int max8998_ldo_enable(struct regulator_dev *rdev)
+{
+       struct max8998_data *max8998 = rdev_get_drvdata(rdev);
+       int reg, shift = 8, ret;
+
+       ret = max8998_get_enable_register(rdev, &reg, &shift);
+       if (ret)
+               return ret;
+
+       return max8998_update_reg(max8998->iodev, reg, 1<<shift, 1<<shift);
+}
+
+static int max8998_ldo_disable(struct regulator_dev *rdev)
+{
+       struct max8998_data *max8998 = rdev_get_drvdata(rdev);
+       int reg, shift = 8, ret;
+
+       ret = max8998_get_enable_register(rdev, &reg, &shift);
+       if (ret)
+               return ret;
+
+       return max8998_update_reg(max8998->iodev, reg, 0, 1<<shift);
+}
+
+static int max8998_get_voltage_register(struct regulator_dev *rdev,
+                               int *_reg, int *_shift, int *_mask)
+{
+       int ldo = max8998_get_ldo(rdev);
+       int reg, shift = 0, mask = 0xff;
+
+       switch (ldo) {
+       case MAX8998_LDO2 ... MAX8998_LDO3:
+               reg = MAX8998_REG_LDO2_LDO3;
+               mask = 0xf;
+               if (ldo == MAX8998_LDO2)
+                       shift = 4;
+               else
+                       shift = 0;
+               break;
+       case MAX8998_LDO4 ... MAX8998_LDO7:
+               reg = MAX8998_REG_LDO4 + (ldo - MAX8998_LDO4);
+               break;
+       case MAX8998_LDO8 ... MAX8998_LDO9:
+               reg = MAX8998_REG_LDO8_LDO9;
+               mask = 0xf;
+               if (ldo == MAX8998_LDO8)
+                       shift = 4;
+               else
+                       shift = 0;
+               break;
+       case MAX8998_LDO10 ... MAX8998_LDO11:
+               reg = MAX8998_REG_LDO10_LDO11;
+               if (ldo == MAX8998_LDO10) {
+                       shift = 5;
+                       mask = 0x7;
+               } else {
+                       shift = 0;
+                       mask = 0x1f;
+               }
+               break;
+       case MAX8998_LDO12 ... MAX8998_LDO17:
+               reg = MAX8998_REG_LDO12 + (ldo - MAX8998_LDO12);
+               break;
+       case MAX8998_BUCK1:
+               reg = MAX8998_REG_BUCK1_DVSARM1;
+               break;
+       case MAX8998_BUCK2:
+               reg = MAX8998_REG_BUCK2_DVSINT1;
+               break;
+       case MAX8998_BUCK3:
+               reg = MAX8998_REG_BUCK3;
+               break;
+       case MAX8998_BUCK4:
+               reg = MAX8998_REG_BUCK4;
+               break;
+       default:
+               return -EINVAL;
+       }
+
+       *_reg = reg;
+       *_shift = shift;
+       *_mask = mask;
+
+       return 0;
+}
+
+static int max8998_get_voltage(struct regulator_dev *rdev)
+{
+       struct max8998_data *max8998 = rdev_get_drvdata(rdev);
+       int reg, shift = 0, mask, ret;
+       u8 val;
+
+       ret = max8998_get_voltage_register(rdev, &reg, &shift, &mask);
+       if (ret)
+               return ret;
+
+       ret = max8998_read_reg(max8998->iodev, reg, &val);
+       if (ret)
+               return ret;
+
+       val >>= shift;
+       val &= mask;
+
+       return max8998_list_voltage(rdev, val);
+}
+
+static int max8998_set_voltage(struct regulator_dev *rdev,
+                               int min_uV, int max_uV)
+{
+       struct max8998_data *max8998 = rdev_get_drvdata(rdev);
+       int min_vol = min_uV / 1000, max_vol = max_uV / 1000;
+       const struct voltage_map_desc *desc;
+       int ldo = max8998_get_ldo(rdev);
+       int reg, shift = 0, mask, ret;
+       int i = 0;
+
+       if (ldo > ARRAY_SIZE(ldo_voltage_map))
+               return -EINVAL;
+
+       desc = ldo_voltage_map[ldo];
+       if (desc == NULL)
+               return -EINVAL;
+
+       if (max_vol < desc->min || min_vol > desc->max)
+               return -EINVAL;
+
+       while (desc->min + desc->step*i < max_vol &&
+              desc->min + desc->step*i < desc->max)
+               i++;
+
+       ret = max8998_get_voltage_register(rdev, &reg, &shift, &mask);
+       if (ret)
+               return ret;
+
+       return max8998_update_reg(max8998->iodev, reg, i<<shift, mask<<shift);
+}
+
+static struct regulator_ops max8998_ldo_ops = {
+       .list_voltage           = max8998_list_voltage,
+       .is_enabled             = max8998_ldo_is_enabled,
+       .enable                 = max8998_ldo_enable,
+       .disable                = max8998_ldo_disable,
+       .get_voltage            = max8998_get_voltage,
+       .set_voltage            = max8998_set_voltage,
+       .set_suspend_enable     = max8998_ldo_enable,
+       .set_suspend_disable    = max8998_ldo_disable,
+};
+
+static struct regulator_ops max8998_buck_ops = {
+       .list_voltage           = max8998_list_voltage,
+       .is_enabled             = max8998_ldo_is_enabled,
+       .enable                 = max8998_ldo_enable,
+       .disable                = max8998_ldo_disable,
+       .get_voltage            = max8998_get_voltage,
+       .set_voltage            = max8998_set_voltage,
+       .set_suspend_enable     = max8998_ldo_enable,
+       .set_suspend_disable    = max8998_ldo_disable,
+};
+
+static struct regulator_ops max8998_others_ops = {
+       .is_enabled             = max8998_ldo_is_enabled,
+       .enable                 = max8998_ldo_enable,
+       .disable                = max8998_ldo_disable,
+       .set_suspend_enable     = max8998_ldo_enable,
+       .set_suspend_disable    = max8998_ldo_disable,
+};
+
+static struct regulator_desc regulators[] = {
+       {
+               .name           = "LDO2",
+               .id             = MAX8998_LDO2,
+               .ops            = &max8998_ldo_ops,
+               .type           = REGULATOR_VOLTAGE,
+               .owner          = THIS_MODULE,
+       }, {
+               .name           = "LDO3",
+               .id             = MAX8998_LDO3,
+               .ops            = &max8998_ldo_ops,
+               .type           = REGULATOR_VOLTAGE,
+               .owner          = THIS_MODULE,
+       }, {
+               .name           = "LDO4",
+               .id             = MAX8998_LDO4,
+               .ops            = &max8998_ldo_ops,
+               .type           = REGULATOR_VOLTAGE,
+               .owner          = THIS_MODULE,
+       }, {
+               .name           = "LDO5",
+               .id             = MAX8998_LDO5,
+               .ops            = &max8998_ldo_ops,
+               .type           = REGULATOR_VOLTAGE,
+               .owner          = THIS_MODULE,
+       }, {
+               .name           = "LDO6",
+               .id             = MAX8998_LDO6,
+               .ops            = &max8998_ldo_ops,
+               .type           = REGULATOR_VOLTAGE,
+               .owner          = THIS_MODULE,
+       }, {
+               .name           = "LDO7",
+               .id             = MAX8998_LDO7,
+               .ops            = &max8998_ldo_ops,
+               .type           = REGULATOR_VOLTAGE,
+               .owner          = THIS_MODULE,
+       }, {
+               .name           = "LDO8",
+               .id             = MAX8998_LDO8,
+               .ops            = &max8998_ldo_ops,
+               .type           = REGULATOR_VOLTAGE,
+               .owner          = THIS_MODULE,
+       }, {
+               .name           = "LDO9",
+               .id             = MAX8998_LDO9,
+               .ops            = &max8998_ldo_ops,
+               .type           = REGULATOR_VOLTAGE,
+               .owner          = THIS_MODULE,
+       }, {
+               .name           = "LDO10",
+               .id             = MAX8998_LDO10,
+               .ops            = &max8998_ldo_ops,
+               .type           = REGULATOR_VOLTAGE,
+               .owner          = THIS_MODULE,
+       }, {
+               .name           = "LDO11",
+               .id             = MAX8998_LDO11,
+               .ops            = &max8998_ldo_ops,
+               .type           = REGULATOR_VOLTAGE,
+               .owner          = THIS_MODULE,
+       }, {
+               .name           = "LDO12",
+               .id             = MAX8998_LDO12,
+               .ops            = &max8998_ldo_ops,
+               .type           = REGULATOR_VOLTAGE,
+               .owner          = THIS_MODULE,
+       }, {
+               .name           = "LDO13",
+               .id             = MAX8998_LDO13,
+               .ops            = &max8998_ldo_ops,
+               .type           = REGULATOR_VOLTAGE,
+               .owner          = THIS_MODULE,
+       }, {
+               .name           = "LDO14",
+               .id             = MAX8998_LDO14,
+               .ops            = &max8998_ldo_ops,
+               .type           = REGULATOR_VOLTAGE,
+               .owner          = THIS_MODULE,
+       }, {
+               .name           = "LDO15",
+               .id             = MAX8998_LDO15,
+               .ops            = &max8998_ldo_ops,
+               .type           = REGULATOR_VOLTAGE,
+               .owner          = THIS_MODULE,
+       }, {
+               .name           = "LDO16",
+               .id             = MAX8998_LDO16,
+               .ops            = &max8998_ldo_ops,
+               .type           = REGULATOR_VOLTAGE,
+               .owner          = THIS_MODULE,
+       }, {
+               .name           = "LDO17",
+               .id             = MAX8998_LDO17,
+               .ops            = &max8998_ldo_ops,
+               .type           = REGULATOR_VOLTAGE,
+               .owner          = THIS_MODULE,
+       }, {
+               .name           = "BUCK1",
+               .id             = MAX8998_BUCK1,
+               .ops            = &max8998_buck_ops,
+               .type           = REGULATOR_VOLTAGE,
+               .owner          = THIS_MODULE,
+       }, {
+               .name           = "BUCK2",
+               .id             = MAX8998_BUCK2,
+               .ops            = &max8998_buck_ops,
+               .type           = REGULATOR_VOLTAGE,
+               .owner          = THIS_MODULE,
+       }, {
+               .name           = "BUCK3",
+               .id             = MAX8998_BUCK3,
+               .ops            = &max8998_buck_ops,
+               .type           = REGULATOR_VOLTAGE,
+               .owner          = THIS_MODULE,
+       }, {
+               .name           = "BUCK4",
+               .id             = MAX8998_BUCK4,
+               .ops            = &max8998_buck_ops,
+               .type           = REGULATOR_VOLTAGE,
+               .owner          = THIS_MODULE,
+       }, {
+               .name           = "EN32KHz AP",
+               .id             = MAX8998_EN32KHZ_AP,
+               .ops            = &max8998_others_ops,
+               .type           = REGULATOR_VOLTAGE,
+               .owner          = THIS_MODULE,
+       }, {
+               .name           = "EN32KHz CP",
+               .id             = MAX8998_EN32KHZ_CP,
+               .ops            = &max8998_others_ops,
+               .type           = REGULATOR_VOLTAGE,
+               .owner          = THIS_MODULE,
+       }, {
+               .name           = "ENVICHG",
+               .id             = MAX8998_ENVICHG,
+               .ops            = &max8998_others_ops,
+               .type           = REGULATOR_VOLTAGE,
+               .owner          = THIS_MODULE,
+       }, {
+               .name           = "ESAFEOUT1",
+               .id             = MAX8998_ESAFEOUT1,
+               .ops            = &max8998_others_ops,
+               .type           = REGULATOR_VOLTAGE,
+               .owner          = THIS_MODULE,
+       }, {
+               .name           = "ESAFEOUT2",
+               .id             = MAX8998_ESAFEOUT2,
+               .ops            = &max8998_others_ops,
+               .type           = REGULATOR_VOLTAGE,
+               .owner          = THIS_MODULE,
+       }
+};
+
+static __devinit int max8998_pmic_probe(struct platform_device *pdev)
+{
+       struct max8998_dev *iodev = dev_get_drvdata(pdev->dev.parent);
+       struct max8998_platform_data *pdata = dev_get_platdata(iodev->dev);
+       struct regulator_dev **rdev;
+       struct max8998_data *max8998;
+       int i, ret, size;
+
+       if (!pdata) {
+               dev_err(pdev->dev.parent, "No platform init data supplied\n");
+               return -ENODEV;
+       }
+
+       max8998 = kzalloc(sizeof(struct max8998_data), GFP_KERNEL);
+       if (!max8998)
+               return -ENOMEM;
+
+       size = sizeof(struct regulator_dev *) * (pdata->num_regulators + 1);
+       max8998->rdev = kzalloc(size, GFP_KERNEL);
+       if (!max8998->rdev) {
+               kfree(max8998);
+               return -ENOMEM;
+       }
+
+       rdev = max8998->rdev;
+       max8998->iodev = iodev;
+       platform_set_drvdata(pdev, max8998);
+
+       for (i = 0; i < pdata->num_regulators; i++) {
+               const struct voltage_map_desc *desc;
+               int id = pdata->regulators[i].id;
+               int index = id - MAX8998_LDO2;
+
+               desc = ldo_voltage_map[id];
+               if (desc && regulators[index].ops != &max8998_others_ops) {
+                       int count = (desc->max - desc->min) / desc->step + 1;
+                       regulators[index].n_voltages = count;
+               }
+               rdev[i] = regulator_register(&regulators[index], max8998->dev,
+                               pdata->regulators[i].initdata, max8998);
+               if (IS_ERR(rdev[i])) {
+                       ret = PTR_ERR(rdev[i]);
+                       dev_err(max8998->dev, "regulator init failed\n");
+                       rdev[i] = NULL;
+                       goto err;
+               }
+       }
+
+
+       return 0;
+err:
+       for (i = 0; i <= max8998->num_regulators; i++)
+               if (rdev[i])
+                       regulator_unregister(rdev[i]);
+
+       kfree(max8998->rdev);
+       kfree(max8998);
+
+       return ret;
+}
+
+static int __devexit max8998_pmic_remove(struct platform_device *pdev)
+{
+       struct max8998_data *max8998 = platform_get_drvdata(pdev);
+       struct regulator_dev **rdev = max8998->rdev;
+       int i;
+
+       for (i = 0; i <= max8998->num_regulators; i++)
+               if (rdev[i])
+                       regulator_unregister(rdev[i]);
+
+       kfree(max8998->rdev);
+       kfree(max8998);
+
+       return 0;
+}
+
+static struct platform_driver max8998_pmic_driver = {
+       .driver = {
+               .name = "max8998-pmic",
+               .owner = THIS_MODULE,
+       },
+       .probe = max8998_pmic_probe,
+       .remove = __devexit_p(max8998_pmic_remove),
+};
+
+static int __init max8998_pmic_init(void)
+{
+       return platform_driver_register(&max8998_pmic_driver);
+}
+subsys_initcall(max8998_pmic_init);
+
+static void __exit max8998_pmic_cleanup(void)
+{
+       platform_driver_unregister(&max8998_pmic_driver);
+}
+module_exit(max8998_pmic_cleanup);
+
+MODULE_DESCRIPTION("MAXIM 8998 voltage regulator driver");
+MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/mfd/max8998-private.h b/include/linux/mfd/max8998-private.h
new file mode 100644 (file)
index 0000000..6dc75b3
--- /dev/null
@@ -0,0 +1,112 @@
+/*
+ * max8698.h - Voltage regulator driver for the Maxim 8998
+ *
+ *  Copyright (C) 2009-2010 Samsung Electrnoics
+ *  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
+ */
+
+#ifndef __LINUX_MFD_MAX8998_PRIV_H
+#define __LINUX_MFD_MAX8998_PRIV_H
+
+/* MAX 8998 registers */
+enum {
+       MAX8998_REG_IRQ1,
+       MAX8998_REG_IRQ2,
+       MAX8998_REG_IRQ3,
+       MAX8998_REG_IRQ4,
+       MAX8998_REG_IRQM1,
+       MAX8998_REG_IRQM2,
+       MAX8998_REG_IRQM3,
+       MAX8998_REG_IRQM4,
+       MAX8998_REG_STATUS1,
+       MAX8998_REG_STATUS2,
+       MAX8998_REG_STATUSM1,
+       MAX8998_REG_STATUSM2,
+       MAX8998_REG_CHGR1,
+       MAX8998_REG_CHGR2,
+       MAX8998_REG_LDO_ACTIVE_DISCHARGE1,
+       MAX8998_REG_LDO_ACTIVE_DISCHARGE2,
+       MAX8998_REG_BUCK_ACTIVE_DISCHARGE3,
+       MAX8998_REG_ONOFF1,
+       MAX8998_REG_ONOFF2,
+       MAX8998_REG_ONOFF3,
+       MAX8998_REG_ONOFF4,
+       MAX8998_REG_BUCK1_DVSARM1,
+       MAX8998_REG_BUCK1_DVSARM2,
+       MAX8998_REG_BUCK1_DVSARM3,
+       MAX8998_REG_BUCK1_DVSARM4,
+       MAX8998_REG_BUCK2_DVSINT1,
+       MAX8998_REG_BUCK2_DVSINT2,
+       MAX8998_REG_BUCK3,
+       MAX8998_REG_BUCK4,
+       MAX8998_REG_LDO2_LDO3,
+       MAX8998_REG_LDO4,
+       MAX8998_REG_LDO5,
+       MAX8998_REG_LDO6,
+       MAX8998_REG_LDO7,
+       MAX8998_REG_LDO8_LDO9,
+       MAX8998_REG_LDO10_LDO11,
+       MAX8998_REG_LDO12,
+       MAX8998_REG_LDO13,
+       MAX8998_REG_LDO14,
+       MAX8998_REG_LDO15,
+       MAX8998_REG_LDO16,
+       MAX8998_REG_LDO17,
+       MAX8998_REG_BKCHR,
+       MAX8998_REG_LBCNFG1,
+       MAX8998_REG_LBCNFG2,
+};
+
+/**
+ * struct max8998_dev - max8998 master device for sub-drivers
+ * @dev: master device of the chip (can be used to access platform data)
+ * @i2c_client: i2c client private data
+ * @dev_read():        chip register read function
+ * @dev_write(): chip register write function
+ * @dev_update(): chip register update function
+ * @iolock: mutex for serializing io access
+ */
+
+struct max8998_dev {
+       struct device *dev;
+       struct i2c_client *i2c_client;
+       int (*dev_read)(struct max8998_dev *max8998, u8 reg, u8 *dest);
+       int (*dev_write)(struct max8998_dev *max8998, u8 reg, u8 val);
+       int (*dev_update)(struct max8998_dev *max8998, u8 reg, u8 val, u8 mask);
+       struct mutex iolock;
+};
+
+static inline int max8998_read_reg(struct max8998_dev *max8998, u8 reg,
+                                  u8 *value)
+{
+       return max8998->dev_read(max8998, reg, value);
+}
+
+static inline int max8998_write_reg(struct max8998_dev *max8998, u8 reg,
+                                   u8 value)
+{
+       return max8998->dev_write(max8998, reg, value);
+}
+
+static inline int max8998_update_reg(struct max8998_dev *max8998, u8 reg,
+                                    u8 value, u8 mask)
+{
+       return max8998->dev_update(max8998, reg, value, mask);
+}
+
+#endif /*  __LINUX_MFD_MAX8998_PRIV_H */
diff --git a/include/linux/mfd/max8998.h b/include/linux/mfd/max8998.h
new file mode 100644 (file)
index 0000000..1d3601a
--- /dev/null
@@ -0,0 +1,78 @@
+/*
+ * max8698.h - Voltage regulator driver for the Maxim 8998
+ *
+ *  Copyright (C) 2009-2010 Samsung Electrnoics
+ *  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
+ */
+
+#ifndef __LINUX_MFD_MAX8998_H
+#define __LINUX_MFD_MAX8998_H
+
+#include <linux/regulator/machine.h>
+
+/* MAX 8998 regulator ids */
+enum {
+       MAX8998_LDO2 = 2,
+       MAX8998_LDO3,
+       MAX8998_LDO4,
+       MAX8998_LDO5,
+       MAX8998_LDO6,
+       MAX8998_LDO7,
+       MAX8998_LDO8,
+       MAX8998_LDO9,
+       MAX8998_LDO10,
+       MAX8998_LDO11,
+       MAX8998_LDO12,
+       MAX8998_LDO13,
+       MAX8998_LDO14,
+       MAX8998_LDO15,
+       MAX8998_LDO16,
+       MAX8998_LDO17,
+       MAX8998_BUCK1,
+       MAX8998_BUCK2,
+       MAX8998_BUCK3,
+       MAX8998_BUCK4,
+       MAX8998_EN32KHZ_AP,
+       MAX8998_EN32KHZ_CP,
+       MAX8998_ENVICHG,
+       MAX8998_ESAFEOUT1,
+       MAX8998_ESAFEOUT2,
+};
+
+/**
+ * max8998_regulator_data - regulator data
+ * @id: regulator id
+ * @initdata: regulator init data (contraints, supplies, ...)
+ */
+struct max8998_regulator_data {
+       int                             id;
+       struct regulator_init_data      *initdata;
+};
+
+/**
+ * struct max8998_board - packages regulator init data
+ * @num_regulators: number of regultors used
+ * @regulators: array of defined regulators
+ */
+
+struct max8998_platform_data {
+       int                             num_regulators;
+       struct max8998_regulator_data   *regulators;
+};
+
+#endif /*  __LINUX_MFD_MAX8998_H */