--- /dev/null
+/*
+ * Copyright (C) 2010-2015 Freescale Semiconductor, Inc.
+ *
+ * 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
+ *
+ */
+
+/*!
+ * @file pmic/core/max17135.c
+ * @brief This file contains MAX17135 specific PMIC code. This implementaion
+ * may differ for each PMIC chip.
+ *
+ * @ingroup PMIC_CORE
+ */
+
+/*
+ * Includes
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/device.h>
+#include <linux/i2c.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/uaccess.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_gpio.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/machine.h>
+#include <linux/pmic_status.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/max17135.h>
+#include <asm/mach-types.h>
+
+static int max17135_detect(struct i2c_client *client,
+ struct i2c_board_info *info);
+struct i2c_client *max17135_client;
+static struct regulator *gpio_regulator;
+
+static struct mfd_cell max17135_devs[] = {
+ { .name = "max17135-pmic", },
+ { .name = "max17135-sns", },
+};
+
+static const unsigned short normal_i2c[] = {0x48, I2C_CLIENT_END};
+
+int max17135_reg_read(int reg_num, unsigned int *reg_val)
+{
+ int result;
+
+ if (max17135_client == NULL)
+ return PMIC_ERROR;
+
+ if ((reg_num == REG_MAX17135_EXT_TEMP) ||
+ (reg_num == REG_MAX17135_INT_TEMP)) {
+ result = i2c_smbus_read_word_data(max17135_client, reg_num);
+ if (result < 0) {
+ dev_err(&max17135_client->dev,
+ "Unable to read MAX17135 register via I2C\n");
+ return PMIC_ERROR;
+ }
+ /* Swap bytes for dword read */
+ result = (result >> 8) | ((result & 0xFF) << 8);
+ } else {
+ result = i2c_smbus_read_byte_data(max17135_client, reg_num);
+ if (result < 0) {
+ dev_err(&max17135_client->dev,
+ "Unable to read MAX17135 register via I2C\n");
+ return PMIC_ERROR;
+ }
+ }
+
+ *reg_val = result;
+ return PMIC_SUCCESS;
+}
+
+int max17135_reg_write(int reg_num, const unsigned int reg_val)
+{
+ int result;
+
+ if (max17135_client == NULL)
+ return PMIC_ERROR;
+
+ result = i2c_smbus_write_byte_data(max17135_client, reg_num, reg_val);
+ if (result < 0) {
+ dev_err(&max17135_client->dev,
+ "Unable to write MAX17135 register via I2C\n");
+ return PMIC_ERROR;
+ }
+
+ return PMIC_SUCCESS;
+}
+
+#ifdef CONFIG_OF
+static struct max17135_platform_data *max17135_i2c_parse_dt_pdata(
+ struct device *dev)
+{
+ struct max17135_platform_data *pdata;
+
+ pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata) {
+ dev_err(dev, "could not allocate memory for pdata\n");
+ return ERR_PTR(-ENOMEM);
+ }
+
+ return pdata;
+}
+#else
+static struct max17135_platform_data *max17135_i2c_parse_dt_pdata(
+ struct device *dev)
+{
+ return NULL;
+}
+#endif /* !CONFIG_OF */
+
+static int max17135_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct max17135 *max17135;
+ struct max17135_platform_data *pdata = client->dev.platform_data;
+ struct device_node *np = client->dev.of_node;
+ int ret = 0;
+
+ if (!np)
+ return -ENODEV;
+
+ gpio_regulator = devm_regulator_get(&client->dev, "SENSOR");
+ if (!IS_ERR(gpio_regulator)) {
+ ret = regulator_enable(gpio_regulator);
+ if (ret) {
+ dev_err(&client->dev, "gpio set voltage error\n");
+ return ret;
+ }
+ }
+
+ /* 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_client = client;
+ ret = max17135_detect(client, NULL);
+ if (ret)
+ goto err1;
+
+ mfd_add_devices(max17135->dev, -1, max17135_devs,
+ ARRAY_SIZE(max17135_devs),
+ NULL, 0, NULL);
+
+ if (max17135->dev->of_node) {
+ pdata = max17135_i2c_parse_dt_pdata(max17135->dev);
+ if (IS_ERR(pdata)) {
+ ret = PTR_ERR(pdata);
+ goto err2;
+ }
+
+ }
+ max17135->pdata = pdata;
+
+ dev_info(&client->dev, "PMIC MAX17135 for eInk display\n");
+
+ return ret;
+err2:
+ mfd_remove_devices(max17135->dev);
+err1:
+ kfree(max17135);
+
+ return ret;
+}
+
+
+static int max17135_remove(struct i2c_client *i2c)
+{
+ struct max17135 *max17135 = i2c_get_clientdata(i2c);
+
+ mfd_remove_devices(max17135->dev);
+ return 0;
+}
+
+/* Return 0 if detection is successful, -ENODEV otherwise */
+static int max17135_detect(struct i2c_client *client,
+ struct i2c_board_info *info)
+{
+ struct i2c_adapter *adapter = client->adapter;
+ u8 chip_rev, chip_id;
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+ return -ENODEV;
+
+ /* detection */
+ if (i2c_smbus_read_byte_data(client,
+ REG_MAX17135_PRODUCT_REV) != 0) {
+ dev_err(&adapter->dev,
+ "Max17135 PMIC not found!\n");
+ return -ENODEV;
+ }
+
+ /* identification */
+ chip_rev = i2c_smbus_read_byte_data(client,
+ REG_MAX17135_PRODUCT_REV);
+ chip_id = i2c_smbus_read_byte_data(client,
+ REG_MAX17135_PRODUCT_ID);
+
+ if (chip_rev != 0x00 || chip_id != 0x4D) { /* identification failed */
+ dev_info(&adapter->dev,
+ "Unsupported chip (man_id=0x%02X, "
+ "chip_id=0x%02X).\n", chip_rev, chip_id);
+ return -ENODEV;
+ }
+
+ if (info)
+ strlcpy(info->type, "max17135_sensor", I2C_NAME_SIZE);
+
+ return 0;
+}
+
+static const struct i2c_device_id max17135_id[] = {
+ { "max17135", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, max17135_id);
+
+static const struct of_device_id max17135_dt_ids[] = {
+ {
+ .compatible = "maxim,max17135",
+ .data = (void *) &max17135_id[0],
+ }, {
+ /* sentinel */
+ }
+};
+MODULE_DEVICE_TABLE(of, max17135_dt_ids);
+
+
+static struct i2c_driver max17135_driver = {
+ .driver = {
+ .name = "max17135",
+ .owner = THIS_MODULE,
+ .of_match_table = max17135_dt_ids,
+ },
+ .probe = max17135_probe,
+ .remove = max17135_remove,
+ .id_table = max17135_id,
+ .detect = max17135_detect,
+ .address_list = &normal_i2c[0],
+};
+
+static int __init max17135_init(void)
+{
+ return i2c_add_driver(&max17135_driver);
+}
+
+static void __exit max17135_exit(void)
+{
+ i2c_del_driver(&max17135_driver);
+}
+
+/*
+ * Module entry points
+ */
+subsys_initcall(max17135_init);
+module_exit(max17135_exit);
--- /dev/null
+/*
+ * Copyright (C) 2010-2015 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/of_regulator.h>
+#include <linux/mfd/max17135.h>
+#include <linux/gpio.h>
+#include <linux/of_gpio.h>
+
+/*
+ * 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 12
+
+#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_data {
+ int num_regulators;
+ struct max17135 *max17135;
+ struct regulator_dev **rdev;
+};
+
+static long unsigned int max17135_pass_num = { 1 };
+static int max17135_vcom = { -1250000 };
+
+struct max17135_vcom_programming_data vcom_data[2] = {
+ {
+ -4325000,
+ -500000,
+ 15000,
+ },
+ {
+ -3050000,
+ -500000,
+ 10000,
+ },
+};
+
+static int max17135_is_power_good(struct max17135 *max17135);
+
+/*
+ * Regulator operations
+ */
+static int max17135_hvinp_set_voltage(struct regulator_dev *reg,
+ int minuV, int uV, unsigned *selector)
+{
+ unsigned int reg_val;
+ unsigned int fld_val;
+
+ 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;
+
+ max17135_reg_read(REG_MAX17135_HVINP, ®_val);
+
+ reg_val &= ~BITFMASK(HVINP);
+ reg_val |= BITFVAL(HVINP, fld_val); /* shift to correct bit */
+
+ return max17135_reg_write(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;
+
+ max17135_reg_read(REG_MAX17135_HVINP, ®_val);
+
+ 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, unsigned *selector)
+{
+ struct max17135 *max17135 = rdev_get_drvdata(reg);
+ 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;
+
+ max17135_reg_read(REG_MAX17135_DVR, ®_val);
+
+ /*
+ * 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));
+ max17135_reg_write(REG_MAX17135_DVR, reg_val);
+
+ reg_val = BITFVAL(CTRL_DVR, true); /* shift to correct bit */
+ return max17135_reg_write(REG_MAX17135_PRGM_CTRL, reg_val);
+ }
+
+ return 0;
+}
+
+static int max17135_vcom_get_voltage(struct regulator_dev *reg)
+{
+ struct max17135 *max17135 = rdev_get_drvdata(reg);
+ unsigned int reg_val;
+
+ max17135_reg_read(REG_MAX17135_DVR, ®_val);
+ 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 && max17135_is_power_good(max17135)) {
+ max17135_vcom_set_voltage(reg,
+ max17135->vcom_uV,
+ max17135->vcom_uV,
+ NULL);
+ max17135->vcom_setup = true;
+ }
+
+ /* enable VCOM regulator output */
+ if (max17135->pass_num == 1)
+ gpio_set_value(max17135->gpio_pmic_vcom_ctrl, 1);
+ else {
+ unsigned int reg_val;
+
+ max17135_reg_read(REG_MAX17135_ENABLE, ®_val);
+ reg_val &= ~BITFMASK(VCOM_ENABLE);
+ reg_val |= BITFVAL(VCOM_ENABLE, 1); /* shift to correct bit */
+ max17135_reg_write(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 {
+ unsigned int reg_val;
+
+ max17135_reg_read(REG_MAX17135_ENABLE, ®_val);
+ reg_val &= ~BITFMASK(VCOM_ENABLE);
+ max17135_reg_write(REG_MAX17135_ENABLE, reg_val);
+ }
+
+ return 0;
+}
+
+static int max17135_vcom_is_enabled(struct regulator_dev *reg)
+{
+ struct max17135 *max17135 = rdev_get_drvdata(reg);
+
+ /* read VCOM regulator enable setting */
+ if (max17135->pass_num == 1) {
+ int gpio = gpio_get_value(max17135->gpio_pmic_vcom_ctrl);
+ if (gpio == 0)
+ return 0;
+ else
+ return 1;
+ } else {
+ unsigned int reg_val;
+
+ max17135_reg_read(REG_MAX17135_ENABLE, ®_val);
+ reg_val &= BITFMASK(VCOM_ENABLE);
+ if (reg_val != 0)
+ return 1;
+ else
+ return 0;
+ }
+}
+
+static int max17135_is_power_good(struct max17135 *max17135)
+{
+ unsigned int reg_val;
+ unsigned int fld_val;
+
+ max17135_reg_read(REG_MAX17135_FAULT, ®_val);
+ fld_val = (reg_val & BITFMASK(FAULT_POK)) >> FAULT_POK_LSH;
+
+ /* Check the POK bit */
+ return fld_val;
+}
+
+static int max17135_wait_power_good(struct max17135 *max17135)
+{
+ int i;
+
+ for (i = 0; i < max17135->max_wait * 3; i++) {
+ if (max17135_is_power_good(max17135))
+ 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 {
+ unsigned int reg_val;
+
+ max17135_reg_read(REG_MAX17135_ENABLE, ®_val);
+ reg_val &= ~BITFMASK(ENABLE);
+ reg_val |= BITFVAL(ENABLE, 1);
+ max17135_reg_write(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 {
+ unsigned int reg_val;
+
+ max17135_reg_read(REG_MAX17135_ENABLE, ®_val);
+ reg_val &= ~BITFMASK(ENABLE);
+ max17135_reg_write(REG_MAX17135_ENABLE, reg_val);
+ }
+
+ msleep(max17135->max_wait);
+
+ 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;
+}
+
+static int max17135_v3p3_enable(struct regulator_dev *reg)
+{
+ struct max17135 *max17135 = rdev_get_drvdata(reg);
+
+ gpio_set_value(max17135->gpio_pmic_v3p3, 1);
+ return 0;
+}
+
+static int max17135_v3p3_disable(struct regulator_dev *reg)
+{
+ struct max17135 *max17135 = rdev_get_drvdata(reg);
+
+ gpio_set_value(max17135->gpio_pmic_v3p3, 0);
+ return 0;
+}
+
+static int max17135_v3p3_is_enabled(struct regulator_dev *reg)
+{
+ struct max17135 *max17135 = rdev_get_drvdata(reg);
+ int gpio = gpio_get_value(max17135->gpio_pmic_v3p3);
+
+ 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,
+ .is_enabled = max17135_vcom_is_enabled,
+};
+
+static struct regulator_ops max17135_vneg_ops = {
+};
+
+static struct regulator_ops max17135_vpos_ops = {
+};
+
+static struct regulator_ops max17135_v3p3_ops = {
+ .enable = max17135_v3p3_enable,
+ .disable = max17135_v3p3_disable,
+ .is_enabled = max17135_v3p3_is_enabled,
+};
+
+
+/*
+ * 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,
+},
+{
+ .name = "V3P3",
+ .id = MAX17135_V3P3,
+ .ops = &max17135_v3p3_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+},
+};
+
+static void max17135_setup_timings(struct max17135 *max17135)
+{
+ unsigned int reg_val;
+
+ int timing1, timing2, timing3, timing4,
+ timing5, timing6, timing7, timing8;
+
+ max17135_reg_read(REG_MAX17135_TIMING1, &timing1);
+ max17135_reg_read(REG_MAX17135_TIMING2, &timing2);
+ max17135_reg_read(REG_MAX17135_TIMING3, &timing3);
+ max17135_reg_read(REG_MAX17135_TIMING4, &timing4);
+ max17135_reg_read(REG_MAX17135_TIMING5, &timing5);
+ max17135_reg_read(REG_MAX17135_TIMING6, &timing6);
+ max17135_reg_read(REG_MAX17135_TIMING7, &timing7);
+ max17135_reg_read(REG_MAX17135_TIMING8, &timing8);
+
+ if ((timing1 != max17135->gvee_pwrup) ||
+ (timing2 != max17135->vneg_pwrup) ||
+ (timing3 != max17135->vpos_pwrup) ||
+ (timing4 != max17135->gvdd_pwrup) ||
+ (timing5 != max17135->gvdd_pwrdn) ||
+ (timing6 != max17135->vpos_pwrdn) ||
+ (timing7 != max17135->vneg_pwrdn) ||
+ (timing8 != max17135->gvee_pwrdn)) {
+ max17135_reg_write(REG_MAX17135_TIMING1, max17135->gvee_pwrup);
+ max17135_reg_write(REG_MAX17135_TIMING2, max17135->vneg_pwrup);
+ max17135_reg_write(REG_MAX17135_TIMING3, max17135->vpos_pwrup);
+ max17135_reg_write(REG_MAX17135_TIMING4, max17135->gvdd_pwrup);
+ max17135_reg_write(REG_MAX17135_TIMING5, max17135->gvdd_pwrdn);
+ max17135_reg_write(REG_MAX17135_TIMING6, max17135->vpos_pwrdn);
+ max17135_reg_write(REG_MAX17135_TIMING7, max17135->vneg_pwrdn);
+ max17135_reg_write(REG_MAX17135_TIMING8, max17135->gvee_pwrdn);
+
+ reg_val = BITFVAL(CTRL_TIMING, true); /* shift to correct bit */
+ max17135_reg_write(REG_MAX17135_PRGM_CTRL, reg_val);
+ }
+}
+
+#define CHECK_PROPERTY_ERROR_KFREE(prop) \
+do { \
+ int ret = of_property_read_u32(max17135->dev->of_node, \
+ #prop, &max17135->prop); \
+ if (ret < 0) { \
+ return ret; \
+ } \
+} while (0);
+
+#ifdef CONFIG_OF
+static int max17135_pmic_dt_parse_pdata(struct platform_device *pdev,
+ struct max17135_platform_data *pdata)
+{
+ struct max17135 *max17135 = dev_get_drvdata(pdev->dev.parent);
+ struct device_node *pmic_np, *regulators_np, *reg_np;
+ struct max17135_regulator_data *rdata;
+ int i, ret;
+
+ pmic_np = of_node_get(max17135->dev->of_node);
+ if (!pmic_np) {
+ dev_err(&pdev->dev, "could not find pmic sub-node\n");
+ return -ENODEV;
+ }
+
+ regulators_np = of_find_node_by_name(pmic_np, "regulators");
+ if (!regulators_np) {
+ dev_err(&pdev->dev, "could not find regulators sub-node\n");
+ return -EINVAL;
+ }
+
+ pdata->num_regulators = of_get_child_count(regulators_np);
+ dev_dbg(&pdev->dev, "num_regulators %d\n", pdata->num_regulators);
+
+ rdata = devm_kzalloc(&pdev->dev, sizeof(*rdata) *
+ pdata->num_regulators, GFP_KERNEL);
+ if (!rdata) {
+ of_node_put(regulators_np);
+ dev_err(&pdev->dev, "could not allocate memory for"
+ "regulator data\n");
+ return -ENOMEM;
+ }
+
+ pdata->regulators = rdata;
+ for_each_child_of_node(regulators_np, reg_np) {
+ for (i = 0; i < ARRAY_SIZE(max17135_reg); i++)
+ if (!of_node_cmp(reg_np->name, max17135_reg[i].name))
+ break;
+
+ if (i == ARRAY_SIZE(max17135_reg)) {
+ dev_warn(&pdev->dev, "don't know how to configure"
+ "regulator %s\n", reg_np->name);
+ continue;
+ }
+
+ rdata->id = i;
+ rdata->initdata = of_get_regulator_init_data(&pdev->dev,
+ reg_np,
+ &max17135_reg[i]);
+ rdata->reg_node = reg_np;
+ rdata++;
+ }
+ of_node_put(regulators_np);
+
+ CHECK_PROPERTY_ERROR_KFREE(vneg_pwrup);
+ CHECK_PROPERTY_ERROR_KFREE(gvee_pwrup);
+ CHECK_PROPERTY_ERROR_KFREE(vpos_pwrup);
+ CHECK_PROPERTY_ERROR_KFREE(gvdd_pwrup);
+ CHECK_PROPERTY_ERROR_KFREE(gvdd_pwrdn);
+ CHECK_PROPERTY_ERROR_KFREE(vpos_pwrdn);
+ CHECK_PROPERTY_ERROR_KFREE(gvee_pwrdn);
+ CHECK_PROPERTY_ERROR_KFREE(vneg_pwrdn);
+
+ dev_dbg(&pdev->dev, "vneg_pwrup %d, vneg_pwrdn %d, vpos_pwrup %d,"
+ "vpos_pwrdn %d, gvdd_pwrup %d, gvdd_pwrdn %d, gvee_pwrup %d,"
+ "gvee_pwrdn %d\n", max17135->vneg_pwrup, max17135->vneg_pwrdn,
+ max17135->vpos_pwrup, max17135->vpos_pwrdn,
+ max17135->gvdd_pwrup, max17135->gvdd_pwrdn,
+ max17135->gvee_pwrup, max17135->gvee_pwrdn);
+
+ max17135->max_wait = max17135->vpos_pwrup + max17135->vneg_pwrup +
+ max17135->gvdd_pwrup + max17135->gvee_pwrup;
+
+ max17135->gpio_pmic_wakeup = of_get_named_gpio(pmic_np,
+ "gpio_pmic_wakeup", 0);
+ if (!gpio_is_valid(max17135->gpio_pmic_wakeup)) {
+ dev_err(&pdev->dev, "no epdc pmic wakeup pin available\n");
+ goto err;
+ }
+ ret = devm_gpio_request_one(&pdev->dev, max17135->gpio_pmic_wakeup,
+ GPIOF_OUT_INIT_LOW, "epdc-pmic-wake");
+ if (ret < 0)
+ goto err;
+
+ max17135->gpio_pmic_vcom_ctrl = of_get_named_gpio(pmic_np,
+ "gpio_pmic_vcom_ctrl", 0);
+ if (!gpio_is_valid(max17135->gpio_pmic_vcom_ctrl)) {
+ dev_err(&pdev->dev, "no epdc pmic vcom_ctrl pin available\n");
+ goto err;
+ }
+ ret = devm_gpio_request_one(&pdev->dev, max17135->gpio_pmic_vcom_ctrl,
+ GPIOF_OUT_INIT_LOW, "epdc-vcom");
+ if (ret < 0)
+ goto err;
+
+ max17135->gpio_pmic_v3p3 = of_get_named_gpio(pmic_np,
+ "gpio_pmic_v3p3", 0);
+ if (!gpio_is_valid(max17135->gpio_pmic_v3p3)) {
+ dev_err(&pdev->dev, "no epdc pmic v3p3 pin available\n");
+ goto err;
+ }
+ ret = devm_gpio_request_one(&pdev->dev, max17135->gpio_pmic_v3p3,
+ GPIOF_OUT_INIT_LOW, "epdc-v3p3");
+ if (ret < 0)
+ goto err;
+
+ max17135->gpio_pmic_intr = of_get_named_gpio(pmic_np,
+ "gpio_pmic_intr", 0);
+ if (!gpio_is_valid(max17135->gpio_pmic_intr)) {
+ dev_err(&pdev->dev, "no epdc pmic intr pin available\n");
+ goto err;
+ }
+ ret = devm_gpio_request_one(&pdev->dev, max17135->gpio_pmic_intr,
+ GPIOF_IN, "epdc-pmic-int");
+ if (ret < 0)
+ goto err;
+
+ max17135->gpio_pmic_pwrgood = of_get_named_gpio(pmic_np,
+ "gpio_pmic_pwrgood", 0);
+ if (!gpio_is_valid(max17135->gpio_pmic_pwrgood)) {
+ dev_err(&pdev->dev, "no epdc pmic pwrgood pin available\n");
+ goto err;
+ }
+ ret = devm_gpio_request_one(&pdev->dev, max17135->gpio_pmic_pwrgood,
+ GPIOF_IN, "epdc-pwrstat");
+ if (ret < 0)
+ goto err;
+
+err:
+ return 0;
+
+}
+#else
+static int max17135_pmic_dt_parse_pdata(struct platform_device *pdev,
+ struct max17135 *max17135)
+{
+ return 0;
+}
+#endif /* !CONFIG_OF */
+
+/*
+ * Regulator init/probing/exit functions
+ */
+static int max17135_regulator_probe(struct platform_device *pdev)
+{
+ struct max17135 *max17135 = dev_get_drvdata(pdev->dev.parent);
+ struct max17135_platform_data *pdata = max17135->pdata;
+ struct max17135_data *priv;
+ struct regulator_dev **rdev;
+ struct regulator_config config = { };
+ int size, i, ret = 0;
+
+ if (max17135->dev->of_node) {
+ ret = max17135_pmic_dt_parse_pdata(pdev, pdata);
+ if (ret)
+ return ret;
+ }
+ priv = devm_kzalloc(&pdev->dev, sizeof(struct max17135_data),
+ GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ size = sizeof(struct regulator_dev *) * pdata->num_regulators;
+ priv->rdev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
+ if (!priv->rdev)
+ return -ENOMEM;
+
+ rdev = priv->rdev;
+ priv->num_regulators = pdata->num_regulators;
+ platform_set_drvdata(pdev, priv);
+
+ max17135->vcom_setup = false;
+ max17135->pass_num = max17135_pass_num;
+ max17135->vcom_uV = max17135_vcom;
+
+ for (i = 0; i < pdata->num_regulators; i++) {
+ int id = pdata->regulators[i].id;
+
+ config.dev = max17135->dev;
+ config.init_data = pdata->regulators[i].initdata;
+ config.driver_data = max17135;
+ config.of_node = pdata->regulators[i].reg_node;
+
+ rdev[i] = regulator_register(&max17135_reg[id], &config);
+ if (IS_ERR(rdev[i])) {
+ ret = PTR_ERR(rdev[i]);
+ dev_err(&pdev->dev, "regulator init failed for %d\n",
+ id);
+ rdev[i] = NULL;
+ goto err;
+ }
+ }
+
+ /*
+ * Set up PMIC timing values.
+ * Should only be done one time! Timing values may only be
+ * changed a limited number of times according to spec.
+ */
+ max17135_setup_timings(max17135);
+
+ return 0;
+err:
+ while (--i >= 0)
+ regulator_unregister(rdev[i]);
+ return ret;
+}
+
+static int max17135_regulator_remove(struct platform_device *pdev)
+{
+ struct max17135_data *priv = platform_get_drvdata(pdev);
+ struct regulator_dev **rdev = priv->rdev;
+ int i;
+
+ for (i = 0; i < priv->num_regulators; i++)
+ regulator_unregister(rdev[i]);
+ return 0;
+}
+
+static const struct platform_device_id max17135_pmic_id[] = {
+ { "max17135-pmic", 0},
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(platform, max17135_pmic_id);
+
+static struct platform_driver max17135_regulator_driver = {
+ .probe = max17135_regulator_probe,
+ .remove = max17135_regulator_remove,
+ .id_table = max17135_pmic_id,
+ .driver = {
+ .name = "max17135-pmic",
+ },
+};
+
+static int __init max17135_regulator_init(void)
+{
+ return platform_driver_register(&max17135_regulator_driver);
+}
+subsys_initcall_sync(max17135_regulator_init);
+
+static void __exit max17135_regulator_exit(void)
+{
+ platform_driver_unregister(&max17135_regulator_driver);
+}
+module_exit(max17135_regulator_exit);
+
+/*
+ * Parse user specified options (`max17135:')
+ * example:
+ * max17135:pass=2,vcom=-1250000
+ */
+static int __init max17135_setup(char *options)
+{
+ int ret;
+ char *opt;
+ while ((opt = strsep(&options, ",")) != NULL) {
+ if (!*opt)
+ continue;
+ if (!strncmp(opt, "pass=", 5)) {
+ ret = kstrtoul(opt + 5, 0, &max17135_pass_num);
+ if (ret < 0)
+ return ret;
+ }
+ if (!strncmp(opt, "vcom=", 5)) {
+ int offs = 5;
+ if (opt[5] == '-')
+ offs = 6;
+ ret = kstrtoul(opt + offs, 0,
+ (long *)&max17135_vcom);
+ if (ret < 0)
+ return ret;
+ max17135_vcom = -max17135_vcom;
+ }
+ }
+
+ return 1;
+}
+
+__setup("max17135:", max17135_setup);
+
+/* Module information */
+MODULE_DESCRIPTION("MAX17135 regulator driver");
+MODULE_LICENSE("GPL");
projects / linux.git / commitdiff