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path: root/drivers/regulator/max17135-regulator.c
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Diffstat (limited to 'drivers/regulator/max17135-regulator.c')
-rw-r--r--drivers/regulator/max17135-regulator.c749
1 files changed, 749 insertions, 0 deletions
diff --git a/drivers/regulator/max17135-regulator.c b/drivers/regulator/max17135-regulator.c
new file mode 100644
index 000000000000..a667c2f7cf59
--- /dev/null
+++ b/drivers/regulator/max17135-regulator.c
@@ -0,0 +1,749 @@
+/*
+ * Copyright (C) 2010 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/mutex.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/machine.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/max17135.h>
+#include <linux/gpio.h>
+
+/*
+ * PMIC Register Addresses
+ */
+enum {
+ REG_MAX17135_EXT_TEMP = 0x0,
+ REG_MAX17135_CONFIG,
+ REG_MAX17135_INT_TEMP = 0x4,
+ REG_MAX17135_STATUS,
+ REG_MAX17135_PRODUCT_REV,
+ REG_MAX17135_PRODUCT_ID,
+ REG_MAX17135_DVR,
+ REG_MAX17135_ENABLE,
+ REG_MAX17135_FAULT, /*0x0A*/
+ REG_MAX17135_HVINP,
+ REG_MAX17135_PRGM_CTRL,
+ REG_MAX17135_TIMING1 = 0x10, /* Timing regs base address is 0x10 */
+ REG_MAX17135_TIMING2,
+ REG_MAX17135_TIMING3,
+ REG_MAX17135_TIMING4,
+ REG_MAX17135_TIMING5,
+ REG_MAX17135_TIMING6,
+ REG_MAX17135_TIMING7,
+ REG_MAX17135_TIMING8,
+};
+#define MAX17135_REG_NUM 21
+#define MAX17135_MAX_REGISTER 0xFF
+
+/*
+ * Bitfield macros that use rely on bitfield width/shift information.
+ */
+#define BITFMASK(field) (((1U << (field ## _WID)) - 1) << (field ## _LSH))
+#define BITFVAL(field, val) ((val) << (field ## _LSH))
+#define BITFEXT(var, bit) ((var & BITFMASK(bit)) >> (bit ## _LSH))
+
+/*
+ * Shift and width values for each register bitfield
+ */
+#define EXT_TEMP_LSH 7
+#define EXT_TEMP_WID 9
+
+#define THERMAL_SHUTDOWN_LSH 0
+#define THERMAL_SHUTDOWN_WID 1
+
+#define INT_TEMP_LSH 7
+#define INT_TEMP_WID 9
+
+#define STAT_BUSY_LSH 0
+#define STAT_BUSY_WID 1
+#define STAT_OPEN_LSH 1
+#define STAT_OPEN_WID 1
+#define STAT_SHRT_LSH 2
+#define STAT_SHRT_WID 1
+
+#define PROD_REV_LSH 0
+#define PROD_REV_WID 8
+
+#define PROD_ID_LSH 0
+#define PROD_ID_WID 8
+
+#define DVR_LSH 0
+#define DVR_WID 8
+
+#define ENABLE_LSH 0
+#define ENABLE_WID 1
+#define VCOM_ENABLE_LSH 1
+#define VCOM_ENABLE_WID 1
+
+#define FAULT_FBPG_LSH 0
+#define FAULT_FBPG_WID 1
+#define FAULT_HVINP_LSH 1
+#define FAULT_HVINP_WID 1
+#define FAULT_HVINN_LSH 2
+#define FAULT_HVINN_WID 1
+#define FAULT_FBNG_LSH 3
+#define FAULT_FBNG_WID 1
+#define FAULT_HVINPSC_LSH 4
+#define FAULT_HVINPSC_WID 1
+#define FAULT_HVINNSC_LSH 5
+#define FAULT_HVINNSC_WID 1
+#define FAULT_OT_LSH 6
+#define FAULT_OT_WID 1
+#define FAULT_POK_LSH 7
+#define FAULT_POK_WID 1
+
+#define HVINP_LSH 0
+#define HVINP_WID 4
+
+#define CTRL_DVR_LSH 0
+#define CTRL_DVR_WID 1
+#define CTRL_TIMING_LSH 1
+#define CTRL_TIMING_WID 1
+
+#define TIMING1_LSH 0
+#define TIMING1_WID 8
+#define TIMING2_LSH 0
+#define TIMING2_WID 8
+#define TIMING3_LSH 0
+#define TIMING3_WID 8
+#define TIMING4_LSH 0
+#define TIMING4_WID 8
+#define TIMING5_LSH 0
+#define TIMING5_WID 8
+#define TIMING6_LSH 0
+#define TIMING6_WID 8
+#define TIMING7_LSH 0
+#define TIMING7_WID 8
+#define TIMING8_LSH 0
+#define TIMING8_WID 8
+
+/*
+ * Regulator definitions
+ * *_MIN_uV - minimum microvolt for regulator
+ * *_MAX_uV - maximum microvolt for regulator
+ * *_STEP_uV - microvolts between regulator output levels
+ * *_MIN_VAL - minimum register field value for regulator
+ * *_MAX_VAL - maximum register field value for regulator
+ */
+#define MAX17135_HVINP_MIN_uV 5000000
+#define MAX17135_HVINP_MAX_uV 20000000
+#define MAX17135_HVINP_STEP_uV 1000000
+#define MAX17135_HVINP_MIN_VAL 0
+#define MAX17135_HVINP_MAX_VAL 1
+
+#define MAX17135_HVINN_MIN_uV 5000000
+#define MAX17135_HVINN_MAX_uV 20000000
+#define MAX17135_HVINN_STEP_uV 1000000
+#define MAX17135_HVINN_MIN_VAL 0
+#define MAX17135_HVINN_MAX_VAL 1
+
+#define MAX17135_GVDD_MIN_uV 5000000
+#define MAX17135_GVDD_MAX_uV 20000000
+#define MAX17135_GVDD_STEP_uV 1000000
+#define MAX17135_GVDD_MIN_VAL 0
+#define MAX17135_GVDD_MAX_VAL 1
+
+#define MAX17135_GVEE_MIN_uV 5000000
+#define MAX17135_GVEE_MAX_uV 20000000
+#define MAX17135_GVEE_STEP_uV 1000000
+#define MAX17135_GVEE_MIN_VAL 0
+#define MAX17135_GVEE_MAX_VAL 1
+
+#define MAX17135_VCOM_MIN_VAL 0
+#define MAX17135_VCOM_MAX_VAL 255
+
+#define MAX17135_VNEG_MIN_uV 5000000
+#define MAX17135_VNEG_MAX_uV 20000000
+#define MAX17135_VNEG_STEP_uV 1000000
+#define MAX17135_VNEG_MIN_VAL 0
+#define MAX17135_VNEG_MAX_VAL 1
+
+#define MAX17135_VPOS_MIN_uV 5000000
+#define MAX17135_VPOS_MAX_uV 20000000
+#define MAX17135_VPOS_STEP_uV 1000000
+#define MAX17135_VPOS_MIN_VAL 0
+#define MAX17135_VPOS_MAX_VAL 1
+
+struct max17135_vcom_programming_data {
+ int vcom_min_uV;
+ int vcom_max_uV;
+ int vcom_step_uV;
+};
+
+struct max17135_vcom_programming_data vcom_data[2] = {
+ {
+ -4325000,
+ -500000,
+ 15000,
+ },
+ {
+ -3050000,
+ -500000,
+ 10000,
+ },
+};
+
+struct max17135 {
+ /* chip revision */
+ int rev;
+
+ struct device *dev;
+
+ /* Platform connection */
+ struct i2c_client *i2c_client;
+
+ /* Client devices */
+ struct platform_device *pdev[MAX17135_REG_NUM];
+
+ /* GPIOs */
+ int gpio_pmic_pwrgood;
+ int gpio_pmic_vcom_ctrl;
+ int gpio_pmic_wakeup;
+ int gpio_pmic_intr;
+
+ int pass_num;
+ int vcom_uV;
+
+ bool vcom_setup;
+
+ int max_wait;
+};
+
+/*
+ * Regulator operations
+ */
+static int max17135_hvinp_set_voltage(struct regulator_dev *reg,
+ int minuV, int uV)
+{
+ unsigned int reg_val;
+ unsigned int fld_val;
+ struct max17135 *max17135 = rdev_get_drvdata(reg);
+ struct i2c_client *client = max17135->i2c_client;
+
+ if ((uV >= MAX17135_HVINP_MIN_uV) &&
+ (uV <= MAX17135_HVINP_MAX_uV))
+ fld_val = (uV - MAX17135_HVINP_MIN_uV) /
+ MAX17135_HVINP_STEP_uV;
+ else
+ return -EINVAL;
+
+ reg_val = i2c_smbus_read_byte_data(client, REG_MAX17135_HVINP);
+
+ reg_val &= ~BITFMASK(HVINP);
+ reg_val |= BITFVAL(HVINP, fld_val); /* shift to correct bit */
+
+ return i2c_smbus_write_byte_data(client, REG_MAX17135_HVINP, reg_val);
+}
+
+static int max17135_hvinp_get_voltage(struct regulator_dev *reg)
+{
+ unsigned int reg_val;
+ unsigned int fld_val;
+ int volt;
+ struct max17135 *max17135 = rdev_get_drvdata(reg);
+ struct i2c_client *client = max17135->i2c_client;
+
+ reg_val = i2c_smbus_read_byte_data(client, REG_MAX17135_HVINP);
+
+ fld_val = (reg_val & BITFMASK(HVINP)) >> HVINP_LSH;
+
+ if ((fld_val >= MAX17135_HVINP_MIN_VAL) &&
+ (fld_val <= MAX17135_HVINP_MAX_VAL)) {
+ volt = (fld_val * MAX17135_HVINP_STEP_uV) +
+ MAX17135_HVINP_MIN_uV;
+ } else {
+ printk(KERN_ERR "MAX17135: HVINP voltage is out of range\n");
+ volt = 0;
+ }
+ return volt;
+}
+
+static int max17135_hvinp_enable(struct regulator_dev *reg)
+{
+ return 0;
+}
+
+static int max17135_hvinp_disable(struct regulator_dev *reg)
+{
+ return 0;
+}
+
+/* Convert uV to the VCOM register bitfield setting */
+static inline int vcom_uV_to_rs(int uV, int pass_num)
+{
+ return (vcom_data[pass_num].vcom_max_uV - uV)
+ / vcom_data[pass_num].vcom_step_uV;
+}
+
+/* Convert the VCOM register bitfield setting to uV */
+static inline int vcom_rs_to_uV(int rs, int pass_num)
+{
+ return vcom_data[pass_num].vcom_max_uV
+ - (vcom_data[pass_num].vcom_step_uV * rs);
+}
+
+static int max17135_vcom_set_voltage(struct regulator_dev *reg,
+ int minuV, int uV)
+{
+ struct max17135 *max17135 = rdev_get_drvdata(reg);
+ struct i2c_client *client = max17135->i2c_client;
+ unsigned int reg_val;
+ int vcom_read;
+
+ if ((uV < vcom_data[max17135->pass_num-1].vcom_min_uV)
+ || (uV > vcom_data[max17135->pass_num-1].vcom_max_uV))
+ return -EINVAL;
+
+ reg_val = i2c_smbus_read_byte_data(client, REG_MAX17135_DVR);
+
+ /*
+ * Only program VCOM if it is not set to the desired value.
+ * Programming VCOM excessively degrades ability to keep
+ * DVR register value persistent.
+ */
+ vcom_read = vcom_rs_to_uV(reg_val, max17135->pass_num-1);
+ if (vcom_read != max17135->vcom_uV) {
+ reg_val &= ~BITFMASK(DVR);
+ reg_val |= BITFVAL(DVR, vcom_uV_to_rs(uV,
+ max17135->pass_num-1));
+ i2c_smbus_write_byte_data(client, REG_MAX17135_DVR, reg_val);
+
+ reg_val = BITFVAL(CTRL_DVR, true); /* shift to correct bit */
+ return i2c_smbus_write_byte_data(client,
+ REG_MAX17135_PRGM_CTRL, reg_val);
+ }
+}
+
+static int max17135_vcom_get_voltage(struct regulator_dev *reg)
+{
+ struct max17135 *max17135 = rdev_get_drvdata(reg);
+ struct i2c_client *client = max17135->i2c_client;
+ unsigned int reg_val;
+
+ reg_val = i2c_smbus_read_byte_data(client, REG_MAX17135_DVR);
+ return vcom_rs_to_uV(BITFEXT(reg_val, DVR), max17135->pass_num-1);
+}
+
+static int max17135_vcom_enable(struct regulator_dev *reg)
+{
+ struct max17135 *max17135 = rdev_get_drvdata(reg);
+
+ /*
+ * Check to see if we need to set the VCOM voltage.
+ * Should only be done one time. And, we can
+ * only change vcom voltage if we have been enabled.
+ */
+ if (!max17135->vcom_setup
+ && gpio_get_value(max17135->gpio_pmic_pwrgood)) {
+ max17135_vcom_set_voltage(reg,
+ max17135->vcom_uV,
+ max17135->vcom_uV);
+ max17135->vcom_setup = true;
+ }
+
+ /* enable VCOM regulator output */
+ if (max17135->pass_num == 1)
+ gpio_set_value(max17135->gpio_pmic_vcom_ctrl, 1);
+ else {
+ struct i2c_client *client = max17135->i2c_client;
+ unsigned int reg_val;
+
+ reg_val = i2c_smbus_read_byte_data(client, REG_MAX17135_ENABLE);
+ reg_val &= ~BITFMASK(VCOM_ENABLE);
+ reg_val |= BITFVAL(VCOM_ENABLE, 1); /* shift to correct bit */
+ i2c_smbus_write_byte_data(client, REG_MAX17135_ENABLE, reg_val);
+ }
+
+ return 0;
+}
+
+static int max17135_vcom_disable(struct regulator_dev *reg)
+{
+ struct max17135 *max17135 = rdev_get_drvdata(reg);
+ if (max17135->pass_num == 1)
+ gpio_set_value(max17135->gpio_pmic_vcom_ctrl, 0);
+ else {
+ struct i2c_client *client = max17135->i2c_client;
+ unsigned int reg_val;
+
+ reg_val = i2c_smbus_read_byte_data(client, REG_MAX17135_ENABLE);
+ reg_val &= ~BITFMASK(VCOM_ENABLE);
+ i2c_smbus_write_byte_data(client, REG_MAX17135_ENABLE, reg_val);
+ }
+
+ return 0;
+}
+
+static int max17135_wait_power_good(struct max17135 *max17135)
+{
+ int i;
+
+ for (i = 0; i < max17135->max_wait * 3; i++) {
+ if (gpio_get_value(max17135->gpio_pmic_pwrgood))
+ return 0;
+
+ msleep(1);
+ }
+ return -ETIMEDOUT;
+}
+
+static int max17135_display_enable(struct regulator_dev *reg)
+{
+ struct max17135 *max17135 = rdev_get_drvdata(reg);
+
+ /* The Pass 1 parts cannot turn on the PMIC via I2C. */
+ if (max17135->pass_num == 1)
+ gpio_set_value(max17135->gpio_pmic_wakeup, 1);
+ else {
+ struct i2c_client *client = max17135->i2c_client;
+ unsigned int reg_val;
+
+ reg_val = i2c_smbus_read_byte_data(client,
+ REG_MAX17135_ENABLE);
+ reg_val &= ~BITFMASK(ENABLE);
+ reg_val |= BITFVAL(ENABLE, 1);
+ i2c_smbus_write_byte_data(client, REG_MAX17135_ENABLE,
+ reg_val);
+ }
+
+ return max17135_wait_power_good(max17135);
+}
+
+static int max17135_display_disable(struct regulator_dev *reg)
+{
+ struct max17135 *max17135 = rdev_get_drvdata(reg);
+
+ if (max17135->pass_num == 1)
+ gpio_set_value(max17135->gpio_pmic_wakeup, 0);
+ else {
+ struct i2c_client *client = max17135->i2c_client;
+ unsigned int reg_val;
+
+ reg_val = i2c_smbus_read_byte_data(client,
+ REG_MAX17135_ENABLE);
+ reg_val &= ~BITFMASK(ENABLE);
+ i2c_smbus_write_byte_data(client, REG_MAX17135_ENABLE,
+ reg_val);
+ }
+
+ return 0;
+}
+
+static int max17135_display_is_enabled(struct regulator_dev *reg)
+{
+ struct max17135 *max17135 = rdev_get_drvdata(reg);
+ int gpio = gpio_get_value(max17135->gpio_pmic_wakeup);
+
+ if (gpio == 0)
+ return 0;
+ else
+ return 1;
+}
+
+/*
+ * Regulator operations
+ */
+
+static struct regulator_ops max17135_display_ops = {
+ .enable = max17135_display_enable,
+ .disable = max17135_display_disable,
+ .is_enabled = max17135_display_is_enabled,
+};
+
+static struct regulator_ops max17135_gvdd_ops = {
+};
+
+static struct regulator_ops max17135_gvee_ops = {
+};
+
+static struct regulator_ops max17135_hvinn_ops = {
+};
+
+static struct regulator_ops max17135_hvinp_ops = {
+ .enable = max17135_hvinp_enable,
+ .disable = max17135_hvinp_disable,
+ .get_voltage = max17135_hvinp_get_voltage,
+ .set_voltage = max17135_hvinp_set_voltage,
+};
+
+static struct regulator_ops max17135_vcom_ops = {
+ .enable = max17135_vcom_enable,
+ .disable = max17135_vcom_disable,
+ .get_voltage = max17135_vcom_get_voltage,
+ .set_voltage = max17135_vcom_set_voltage,
+};
+
+static struct regulator_ops max17135_vneg_ops = {
+};
+
+static struct regulator_ops max17135_vpos_ops = {
+};
+
+/*
+ * Regulator descriptors
+ */
+static struct regulator_desc max17135_reg[MAX17135_NUM_REGULATORS] = {
+{
+ .name = "DISPLAY",
+ .id = MAX17135_DISPLAY,
+ .ops = &max17135_display_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+},
+{
+ .name = "GVDD",
+ .id = MAX17135_GVDD,
+ .ops = &max17135_gvdd_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+},
+{
+ .name = "GVEE",
+ .id = MAX17135_GVEE,
+ .ops = &max17135_gvee_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+},
+{
+ .name = "HVINN",
+ .id = MAX17135_HVINN,
+ .ops = &max17135_hvinn_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+},
+{
+ .name = "HVINP",
+ .id = MAX17135_HVINP,
+ .ops = &max17135_hvinp_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+},
+{
+ .name = "VCOM",
+ .id = MAX17135_VCOM,
+ .ops = &max17135_vcom_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+},
+{
+ .name = "VNEG",
+ .id = MAX17135_VNEG,
+ .ops = &max17135_vneg_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+},
+{
+ .name = "VPOS",
+ .id = MAX17135_VPOS,
+ .ops = &max17135_vpos_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+},
+};
+
+/*
+ * Regulator init/probing/exit functions
+ */
+static int max17135_regulator_probe(struct platform_device *pdev)
+{
+ struct regulator_dev *rdev;
+
+ rdev = regulator_register(&max17135_reg[pdev->id], &pdev->dev,
+ pdev->dev.platform_data,
+ dev_get_drvdata(&pdev->dev));
+
+ if (IS_ERR(rdev)) {
+ dev_err(&pdev->dev, "failed to register %s\n",
+ max17135_reg[pdev->id].name);
+ return PTR_ERR(rdev);
+ }
+
+ return 0;
+}
+
+static int max17135_regulator_remove(struct platform_device *pdev)
+{
+ struct regulator_dev *rdev = platform_get_drvdata(pdev);
+ regulator_unregister(rdev);
+ return 0;
+}
+
+static struct platform_driver max17135_regulator_driver = {
+ .probe = max17135_regulator_probe,
+ .remove = max17135_regulator_remove,
+ .driver = {
+ .name = "max17135-reg",
+ },
+};
+
+static int max17135_register_regulator(struct max17135 *max17135, int reg,
+ struct regulator_init_data *initdata)
+{
+ struct platform_device *pdev;
+ int ret;
+
+ struct i2c_client *client = max17135->i2c_client;
+ /* If we can't find PMIC via I2C, we should not register regulators */
+ if (i2c_smbus_read_byte_data(client,
+ REG_MAX17135_PRODUCT_REV >= 0)) {
+ dev_err(max17135->dev,
+ "Max17135 PMIC not found!\n");
+ return -ENXIO;
+ }
+
+ if (max17135->pdev[reg])
+ return -EBUSY;
+
+ pdev = platform_device_alloc("max17135-reg", reg);
+ if (!pdev)
+ return -ENOMEM;
+
+ max17135->pdev[reg] = pdev;
+
+ initdata->driver_data = max17135;
+
+ pdev->dev.platform_data = initdata;
+ pdev->dev.parent = max17135->dev;
+ platform_set_drvdata(pdev, max17135);
+
+ ret = platform_device_add(pdev);
+
+ if (ret != 0) {
+ dev_err(max17135->dev,
+ "Failed to register regulator %d: %d\n",
+ reg, ret);
+ platform_device_del(pdev);
+ max17135->pdev[reg] = NULL;
+ }
+
+ return ret;
+}
+
+static int max17135_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ int i;
+ struct max17135 *max17135;
+ struct max17135_platform_data *pdata = client->dev.platform_data;
+ int ret = 0;
+
+ if (!pdata || !pdata->regulator_init)
+ return -ENODEV;
+
+ /* Create the PMIC data structure */
+ max17135 = kzalloc(sizeof(struct max17135), GFP_KERNEL);
+ if (max17135 == NULL) {
+ kfree(client);
+ return -ENOMEM;
+ }
+
+ /* Initialize the PMIC data structure */
+ i2c_set_clientdata(client, max17135);
+ max17135->dev = &client->dev;
+ max17135->i2c_client = client;
+
+ max17135->gpio_pmic_pwrgood = pdata->gpio_pmic_pwrgood;
+ max17135->gpio_pmic_vcom_ctrl = pdata->gpio_pmic_vcom_ctrl;
+ max17135->gpio_pmic_wakeup = pdata->gpio_pmic_wakeup;
+ max17135->gpio_pmic_intr = pdata->gpio_pmic_intr;
+
+ max17135->pass_num = pdata->pass_num;
+ max17135->vcom_uV = pdata->vcom_uV;
+
+ max17135->vcom_setup = false;
+
+ ret = platform_driver_register(&max17135_regulator_driver);
+ if (ret < 0)
+ goto err;
+
+ for (i = 0; i <= MAX17135_VPOS; i++) {
+ ret = max17135_register_regulator(max17135, i, &pdata->regulator_init[i]);
+ if (ret != 0) {
+ dev_err(max17135->dev, "Platform init() failed: %d\n",
+ ret);
+ goto err;
+ }
+ }
+
+ max17135->max_wait = pdata->vpos_pwrup + pdata->vneg_pwrup +
+ pdata->gvdd_pwrup + pdata->gvee_pwrup;
+
+ /* Initialize the PMIC device */
+ dev_info(&client->dev, "PMIC MAX17135 for eInk display\n");
+
+ return ret;
+err:
+ kfree(max17135);
+
+ return ret;
+}
+
+
+static int max17135_i2c_remove(struct i2c_client *i2c)
+{
+ struct max17135 *max17135 = i2c_get_clientdata(i2c);
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(max17135->pdev); i++)
+ platform_device_unregister(max17135->pdev[i]);
+
+ platform_driver_unregister(&max17135_regulator_driver);
+
+ kfree(max17135);
+
+ return 0;
+}
+
+static const struct i2c_device_id max17135_i2c_id[] = {
+ { "max17135", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, max17135_i2c_id);
+
+
+static struct i2c_driver max17135_i2c_driver = {
+ .driver = {
+ .name = "max17135",
+ .owner = THIS_MODULE,
+ },
+ .probe = max17135_i2c_probe,
+ .remove = max17135_i2c_remove,
+ .id_table = max17135_i2c_id,
+};
+
+static int __init max17135_init(void)
+{
+ return i2c_add_driver(&max17135_i2c_driver);
+}
+module_init(max17135_init);
+
+static void __exit max17135_exit(void)
+{
+ i2c_del_driver(&max17135_i2c_driver);
+}
+module_exit(max17135_exit);
+
+/* Module information */
+MODULE_DESCRIPTION("MAX17135 regulator driver");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.0.4) at 2024-04-30 21:47:41 +0000