[PATCH] drivers: regulator: add Maxim 8998 driver

From: Marek Szyprowski
Date: Fri Jun 11 2010 - 03:03:23 EST

From: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>

This patch adds voltage regulator driver for Maxim 8998 chip. This chip
is used on Samsung Aquila and GONI boards.

Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
---
drivers/regulator/Kconfig | 8 +
drivers/regulator/Makefile | 1 +
drivers/regulator/max8998.c | 842 +++++++++++++++++++++++++++++++++++++
include/linux/regulator/max8998.h | 77 ++++
4 files changed, 928 insertions(+), 0 deletions(-)
create mode 100644 drivers/regulator/max8998.c
create mode 100644 include/linux/regulator/max8998.h

diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 679ea37..e041dce 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -100,6 +100,14 @@ 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
+ 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
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index c256668..eafaa68 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -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
index 0000000..ae7c970
--- /dev/null
+++ b/drivers/regulator/max8998.c
@@ -0,0 +1,842 @@
+/*
+ * max8698.c - Voltage regulator driver for the Maxim 8998
+ *
+ * Copyright (C) 2009-2010 Samsung Electronics
+ * Kyungmin Park <kyungmin.park@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.
+ *
+ * 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/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/max8998.h>
+#include <linux/mutex.h>
+
+/* 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_data {
+ struct i2c_client *client;
+ struct device *dev;
+
+ struct mutex mutex;
+
+ int ono_pin;
+ int ono_irq;
+
+ int num_regulators;
+ struct regulator_dev **rdev;
+};
+
+static unsigned int cache_regs_initialized;
+
+static u8 max8998_cache_regs[64] = {
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ -1, -1, 0xff, 0xff, 0x0a, 0x80, 0xff, 0xff,
+ 0xff, 0xed, 0xb8, 0x00, 0xe9, 0x12, 0x12, 0x12,
+ 0x12, 0x12, 0x12, 0x02, 0x04, 0x88, 0x02, 0x0c,
+ 0x0a, 0x0e, 0x30, 0xac, 0x0a, 0x14, 0x06, 0x10,
+ 0x11, 0x01, 0x17, 0x14, -1, -1, -1, -1,
+};
+
+static int max8998_i2c_cache_read(struct i2c_client *client, u8 reg, u8 *dest)
+{
+ *dest = max8998_cache_regs[reg];
+ return 0;
+}
+
+static int max8998_cache_read_allow(u8 reg)
+{
+ switch (reg) {
+ case MAX8998_REG_CHGR2:
+ return 0;
+ default:
+ break;
+ }
+
+ return 1;
+}
+
+static int max8998_i2c_read(struct i2c_client *client, u8 reg, u8 *dest)
+{
+ int ret;
+
+ if (max8998_cache_read_allow(reg) && cache_regs_initialized)
+ return max8998_i2c_cache_read(client, reg, dest);
+
+ ret = i2c_smbus_read_byte_data(client, reg);
+ if (ret < 0)
+ return -EIO;
+
+ ret &= 0xff;
+ max8998_cache_regs[reg] = ret;
+ *dest = ret;
+ return 0;
+}
+
+static int max8998_i2c_write(struct i2c_client *client, u8 reg, u8 value)
+{
+ int ret;
+
+ ret = i2c_smbus_write_byte_data(client, reg, value);
+ if (!ret)
+ max8998_cache_regs[reg] = value;
+ return ret;
+}
+
+static void max8998_cache_register_init(struct i2c_client *client)
+{
+ u8 value;
+ int ret;
+
+ ret = max8998_i2c_read(client, MAX8998_REG_STATUS1, &value);
+ if (ret)
+ return;
+ ret = max8998_i2c_read(client, MAX8998_REG_STATUS2, &value);
+ if (ret)
+ return;
+
+ cache_regs_initialized = 1;
+}
+
+static int max8998_read_reg(struct max8998_data *max8998, u8 reg)
+{
+ u8 value = 0;
+ int ret;
+
+ mutex_lock(&max8998->mutex);
+ ret = max8998_i2c_read(max8998->client, reg, &value);
+ mutex_unlock(&max8998->mutex);
+ if (!ret)
+ ret = value & 0xff;
+
+ return ret;
+}
+
+static int max8998_write_reg(struct max8998_data *max8998, u8 reg, u8 value)
+{
+ int ret;
+
+ mutex_lock(&max8998->mutex);
+ ret = max8998_i2c_write(max8998->client, reg, value);
+ mutex_unlock(&max8998->mutex);
+
+ return ret;
+}
+
+/* Voltage */
+static const int ldo23_voltage_map[] = {
+ 800, 850, 900, 950, 1000,
+ 1050, 1100, 1150, 1200, 1250,
+ 1300,
+};
+
+static const int ldo456711_voltage_map[] = {
+ 1600, 1700, 1800, 1900, 2000,
+ 2100, 2200, 2300, 2400, 2500,
+ 2600, 2700, 2800, 2900, 3000,
+ 3100, 3200, 3300, 3400, 3500,
+ 3600,
+};
+
+static const int ldo8_voltage_map[] = {
+ 3000, 3100, 3200, 3300, 3400,
+ 3500, 3600,
+};
+
+static const int ldo9_voltage_map[] = {
+ 2800, 2900, 3000, 3100,
+};
+
+static const int ldo10_voltage_map[] = {
+ 950, 1000, 1050, 1100, 1150,
+ 1200, 1250, 1300,
+};
+
+static const int ldo1213_voltage_map[] = {
+ 800, 900, 1000, 1100, 1200,
+ 1300, 1400, 1500, 1600, 1700,
+ 1800, 1900, 2000, 2100, 2200,
+ 2300, 2400, 2500, 2600, 2700,
+ 2800, 2900, 3000, 3100, 3200,
+ 3300,
+};
+
+static const int ldo1415_voltage_map[] = {
+ 1200, 1300, 1400, 1500, 1600,
+ 1700, 1800, 1900, 2000, 2100,
+ 2200, 2300, 2400, 2500, 2600,
+ 2700, 2800, 2900, 3000, 3100,
+ 3200, 3300,
+};
+
+static const int ldo1617_voltage_map[] = {
+ 1600, 1700, 1800, 1900, 2000,
+ 2100, 2200, 2300, 2400, 2500,
+ 2600, 2700, 2800, 2900, 3000,
+ 3100, 3200, 3300, 3400, 3500,
+ 3600,
+};
+
+static const int buck12_voltage_map[] = {
+ 750, 775, 800, 825, 850,
+ 875, 900, 925, 950, 975,
+ 1000, 1025, 1050, 1075, 1100,
+ 1125, 1150, 1175, 1200, 1225,
+ 1250, 1275, 1300, 1325, 1350,
+ 1375, 1400, 1425, 1450, 1475,
+ 1500, 1525,
+};
+
+static const int buck3_voltage_map[] = {
+ 1600, 1700, 1800, 1900, 2000,
+ 2100, 2200, 2300, 2400, 2500,
+ 2600, 2700, 2800, 2900, 3000,
+ 3100, 3200, 3300, 3400, 3500,
+ 3600,
+};
+
+static const int buck4_voltage_map[] = {
+ 800, 900, 1000, 1100, 1200,
+ 1300, 1400, 1500, 1600, 1700,
+ 1800, 1900, 2000, 2100, 2200,
+ 2300,
+};
+
+static const int *ldo_voltage_map[] = {
+ NULL,
+ NULL,
+ ldo23_voltage_map, /* LDO2 */
+ ldo23_voltage_map, /* LDO3 */
+ ldo456711_voltage_map, /* LDO4 */
+ ldo456711_voltage_map, /* LDO5 */
+ ldo456711_voltage_map, /* LDO6 */
+ ldo456711_voltage_map, /* LDO7 */
+ ldo8_voltage_map, /* LDO8 */
+ ldo9_voltage_map, /* LDO9 */
+ ldo10_voltage_map, /* LDO10 */
+ ldo456711_voltage_map, /* LDO11 */
+ ldo1213_voltage_map, /* LDO12 */
+ ldo1213_voltage_map, /* LDO13 */
+ ldo1415_voltage_map, /* LDO14 */
+ ldo1415_voltage_map, /* LDO15 */
+ ldo1617_voltage_map, /* LDO16 */
+ ldo1617_voltage_map, /* LDO17 */
+ buck12_voltage_map, /* BUCK1 */
+ buck12_voltage_map, /* BUCK2 */
+ buck3_voltage_map, /* BUCK3 */
+ buck4_voltage_map, /* BUCK4 */
+};
+
+static 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)
+{
+ int ldo = max8998_get_ldo(rdev);
+
+ if (ldo > ARRAY_SIZE(ldo_voltage_map))
+ return -EINVAL;
+
+ return ldo_voltage_map[ldo][selector] * 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 reg, shift = 8, value;
+
+ value = max8998_get_enable_register(rdev, &reg, &shift);
+ if (value)
+ return value;
+
+ value = max8998_read_reg(max8998, reg);
+
+ return value & (1 << shift);
+}
+
+static int max8998_ldo_enable(struct regulator_dev *rdev)
+{
+ struct max8998_data *max8998 = rdev_get_drvdata(rdev);
+ int reg, shift = 8, value, ret;
+
+ ret = max8998_get_enable_register(rdev, &reg, &shift);
+ if (ret)
+ return ret;
+
+ value = max8998_read_reg(max8998, reg);
+ value |= (1 << shift);
+ ret = max8998_write_reg(max8998, reg, value);
+
+ return ret;
+}
+
+static int max8998_ldo_disable(struct regulator_dev *rdev)
+{
+ struct max8998_data *max8998 = rdev_get_drvdata(rdev);
+ int reg, shift = 8, value, ret;
+
+ ret = max8998_get_enable_register(rdev, &reg, &shift);
+ if (ret)
+ return ret;
+
+ value = max8998_read_reg(max8998, reg);
+ value &= ~(1 << shift);
+ ret = max8998_write_reg(max8998, reg, value);
+
+ return ret;
+}
+
+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 = -1, 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 ldo = max8998_get_ldo(rdev);
+ int reg, shift = -1, mask, value, ret;
+
+ ret = max8998_get_voltage_register(rdev, &reg, &shift, &mask);
+ if (ret)
+ return ret;
+
+ value = max8998_read_reg(max8998, reg);
+ if (shift >= 0) {
+ value >>= shift;
+ value &= mask;
+ }
+ if (ldo > ARRAY_SIZE(ldo_voltage_map))
+ return -EINVAL;
+
+ return ldo_voltage_map[ldo][value] * 1000;
+}
+
+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;
+ int ldo = max8998_get_ldo(rdev);
+ const int *vol_map = ldo_voltage_map[ldo];
+ int reg, shift = -1, mask, value, ret;
+ int i;
+
+ for (i = 0; i < vol_map[i]; i++) {
+ if (vol_map[i] >= min_vol)
+ break;
+ }
+
+ if (!vol_map[i] || vol_map[i] > max_vol)
+ return -EINVAL;
+
+ ret = max8998_get_voltage_register(rdev, &reg, &shift, &mask);
+ if (ret)
+ return ret;
+
+ value = max8998_read_reg(max8998, reg);
+ if (shift >= 0) {
+ value &= ~(mask << shift);
+ value |= i << shift;
+ } else
+ value = i;
+ ret = max8998_write_reg(max8998, reg, value);
+
+ return ret;
+}
+
+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,
+ .n_voltages = ARRAY_SIZE(ldo23_voltage_map),
+ .ops = &max8998_ldo_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+ }, {
+ .name = "LDO3",
+ .id = MAX8998_LDO3,
+ .n_voltages = ARRAY_SIZE(ldo23_voltage_map),
+ .ops = &max8998_ldo_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+ }, {
+ .name = "LDO4",
+ .id = MAX8998_LDO4,
+ .n_voltages = ARRAY_SIZE(ldo456711_voltage_map),
+ .ops = &max8998_ldo_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+ }, {
+ .name = "LDO5",
+ .id = MAX8998_LDO5,
+ .n_voltages = ARRAY_SIZE(ldo456711_voltage_map),
+ .ops = &max8998_ldo_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+ }, {
+ .name = "LDO6",
+ .id = MAX8998_LDO6,
+ .n_voltages = ARRAY_SIZE(ldo456711_voltage_map),
+ .ops = &max8998_ldo_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+ }, {
+ .name = "LDO7",
+ .id = MAX8998_LDO7,
+ .n_voltages = ARRAY_SIZE(ldo456711_voltage_map),
+ .ops = &max8998_ldo_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+ }, {
+ .name = "LDO8",
+ .id = MAX8998_LDO8,
+ .n_voltages = ARRAY_SIZE(ldo8_voltage_map),
+ .ops = &max8998_ldo_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+ }, {
+ .name = "LDO9",
+ .id = MAX8998_LDO9,
+ .n_voltages = ARRAY_SIZE(ldo9_voltage_map),
+ .ops = &max8998_ldo_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+ }, {
+ .name = "LDO10",
+ .id = MAX8998_LDO10,
+ .n_voltages = ARRAY_SIZE(ldo10_voltage_map),
+ .ops = &max8998_ldo_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+ }, {
+ .name = "LDO11",
+ .id = MAX8998_LDO11,
+ .n_voltages = ARRAY_SIZE(ldo456711_voltage_map),
+ .ops = &max8998_ldo_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+ }, {
+ .name = "LDO12",
+ .id = MAX8998_LDO12,
+ .n_voltages = ARRAY_SIZE(ldo1213_voltage_map),
+ .ops = &max8998_ldo_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+ }, {
+ .name = "LDO13",
+ .id = MAX8998_LDO13,
+ .n_voltages = ARRAY_SIZE(ldo1213_voltage_map),
+ .ops = &max8998_ldo_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+ }, {
+ .name = "LDO14",
+ .id = MAX8998_LDO14,
+ .n_voltages = ARRAY_SIZE(ldo1415_voltage_map),
+ .ops = &max8998_ldo_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+ }, {
+ .name = "LDO15",
+ .id = MAX8998_LDO15,
+ .n_voltages = ARRAY_SIZE(ldo1415_voltage_map),
+ .ops = &max8998_ldo_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+ }, {
+ .name = "LDO16",
+ .id = MAX8998_LDO16,
+ .n_voltages = ARRAY_SIZE(ldo1617_voltage_map),
+ .ops = &max8998_ldo_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+ }, {
+ .name = "LDO17",
+ .id = MAX8998_LDO17,
+ .n_voltages = ARRAY_SIZE(ldo1617_voltage_map),
+ .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 irqreturn_t max8998_ono_irq(int irq, void *data)
+{
+ return IRQ_HANDLED;
+}
+
+static int __devinit max8998_pmic_probe(struct i2c_client *client,
+ const struct i2c_device_id *i2c_id)
+{
+ struct max8998_platform_data *pdata = client->dev.platform_data;
+ struct regulator_dev **rdev;
+ struct max8998_data *max8998;
+ int i, id, ret, size;
+ int irq;
+
+ if (!pdata) {
+ dev_err(&client->dev, "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->client = client;
+ max8998->dev = &client->dev;
+ max8998->ono_pin = pdata->ono_pin;
+ mutex_init(&max8998->mutex);
+
+ for (i = 0; i < pdata->num_regulators; i++) {
+ id = pdata->regulators[i].id - MAX8998_LDO2,
+ rdev[i] = regulator_register(&regulators[id], max8998->dev,
+ pdata->regulators[i].initdata, max8998);
+ if (IS_ERR(rdev[i])) {
+ err = PTR_ERR(rdev[i]));
+ dev_err(max8998->dev, "regulator init failed\n");
+ rdev[i] = NULL;
+ }
+ }
+
+ if (gpio_is_valid(max8998->ono_pin)) {
+ ret = gpio_request(max8998->ono_pin, "MAX8998 nONO");
+ if (ret)
+ goto out_ono;
+ irq = gpio_to_irq(max8998->ono_pin);
+ ret = request_irq(irq, max8998_ono_irq,
+ IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
+ "max8998 nPower", max8998);
+ if (ret) {
+ dev_err(&client->dev, "Can't get interrupt pin\n");
+ goto out_ono_irq;
+ }
+
+ /* enable wakeup source for power button */
+ set_irq_wake(irq, 1);
+ max8998->ono_irq = irq;
+ }
+
+ i2c_set_clientdata(client, max8998);
+
+ max8998_cache_register_init(client);
+
+ return 0;
+out_ono_irq:
+ for (i = 0; i <= max8998->num_regulators; i++)
+ if (rdev[i])
+ regulator_unregister(rdev[i]);
+
+ gpio_free(max8998->ono_pin);
+out_ono:
+ return ret;
+}
+
+static int __devexit max8998_pmic_remove(struct i2c_client *client)
+{
+ struct max8998_data *max8998 = i2c_get_clientdata(client);
+ struct regulator_dev **rdev = max8998->rdev;
+ int i;
+
+ if (max8998->ono_irq)
+ free_irq(max8998->ono_irq, max8998);
+
+ if (gpio_is_valid(max8998->ono_pin))
+ gpio_free(max8998->ono_pin);
+
+ for (i = 0; i <= max8998->num_regulators; i++)
+ if (rdev[i])
+ regulator_unregister(rdev[i]);
+
+ kfree(max8998->rdev);
+ kfree(max8998);
+
+ return 0;
+}
+
+static const struct i2c_device_id max8998_ids[] = {
+ { "max8998", 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(i2c, max8998_ids);
+
+static struct i2c_driver max8998_pmic_driver = {
+ .probe = max8998_pmic_probe,
+ .remove = __devexit_p(max8998_pmic_remove),
+ .driver = {
+ .name = "max8998",
+ },
+ .id_table = max8998_ids,
+};
+
+static int __init max8998_pmic_init(void)
+{
+ return i2c_add_driver(&max8998_pmic_driver);
+}
+subsys_initcall(max8998_pmic_init);
+
+static void __exit max8998_pmic_exit(void)
+{
+ i2c_del_driver(&max8998_pmic_driver);
+}
+module_exit(max8998_pmic_exit);
+
+MODULE_DESCRIPTION("MAXIM 8998 voltage regulator driver");
+MODULE_AUTHOR("Kyungmin Park <kyungmin.park@xxxxxxxxxxx>");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/regulator/max8998.h b/include/linux/regulator/max8998.h
new file mode 100644
index 0000000..9fc2685
--- /dev/null
+++ b/include/linux/regulator/max8998.h
@@ -0,0 +1,77 @@
+/*
+ * max8698.h - Voltage regulator driver for the Maxim 8998
+ *
+ * Copyright (C) 2009-2010 Samsung Electrnoics
+ * Kyungmin Park <kyungmin.park@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.
+ *
+ * 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_REGULATOR_MAX8998
+#define __LINUX_REGULATOR_MAX8998
+
+#include <linux/regulator/machine.h>
+
+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_subdev_data - regulator data
+ * @id: regulator Id
+ * @initdata: regulator init data (contraints, supplies, ...)
+ */
+struct max8998_subdev_data {
+ int id;
+ struct regulator_init_data *initdata;
+};
+
+/**
+ * max8998_platform_data - platform data for max8998
+ * @num_regulators: number of regultors used
+ * @regulators: regulator used
+ * @ono_pin: gpio pin for power button
+ */
+struct max8998_platform_data {
+ int num_regulators;
+ struct max8998_subdev_data *regulators;
+ int ono_pin;
+};
+
+#endif
--
1.7.1.240.g225c

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