display: Modify LDO driver initialization voltage compatibility
1. During startup, judge whether to register the LDO driver for the first time. If it is the first time, it is not necessary to disable all LDOS; 2. When different pmics are used, different initialization voltages are used for initialization; Change-Id: Ic22e2c05fb9edcb48f93f51add369cb71997741f Signed-off-by: huaqin79 <huaqin79@motorola.com> Reviewed-on: https://gerrit.mot.com/2138715 SME-Granted: SME Approvals Granted SLTApproved: Slta Waiver Tested-by: Jira Key Reviewed-by: Hua Tan <tanhua1@motorola.com> Reviewed-by: Xiangpo Zhao <zhaoxp3@motorola.com> Submit-Approved: Jira Key
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huaqin79 authored and Gilberto Gambugge committed
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2 files changed
+69
-37
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@@ -20,7 +20,17 @@
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#include <linux/regulator/machine.h>
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#include <linux/regulator/of_regulator.h>
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#include "wl2868c-regulator.h"
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static int ldo_chipid = -1;
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static int first_init_flag = 0;
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static int ldo_driver_id = 0;
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enum ldo_device_id {
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WL2868C_ID = 0,
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FAN53870_ID,
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ET5907_ID,
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};
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enum slg51000_regulators {
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WL2868C_REGULATOR_LDO1 = 0,
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WL2868C_REGULATOR_LDO2,
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@@ -96,19 +106,19 @@ static int wl2868c_get_error_flags(struct regulator_dev *rdev, unsigned int *fla
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uint8_t reg_idx;
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unsigned int val = 0;
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printk("************ start dump wl2868c register ************\n");
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printk("register 0x00: chip version\n");
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printk("register 0x01: LDO CL\n");
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printk("register 0x03~0x09: LDO1~LDO7 OUT Voltage\n");
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printk("register 0x0e: Bit[6:0] LDO7~LDO1 EN\n");
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dev_err(chip->dev, "************ start dump wl2868c register ************\n");
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dev_err(chip->dev, "register 0x00: chip version\n");
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dev_err(chip->dev, "register 0x01: LDO CL\n");
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dev_err(chip->dev, "register 0x03~0x09: LDO1~LDO7 OUT Voltage\n");
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dev_err(chip->dev, "register 0x0e: Bit[6:0] LDO7~LDO1 EN\n");
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for (reg_idx = 0; reg_idx < WL2868C_REG_NUM; reg_idx++) {
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regmap_read(chip->regmap, reg_idx, &val);
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reg_dump[reg_idx] = val;
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printk("Reg[0x%02x] = 0x%x", reg_idx, reg_dump[reg_idx]);
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printk("Reg[0x%02x] = 0x%x", reg_idx, reg_dump[reg_idx]);
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dev_err(chip->dev, "Reg[0x%02x] = 0x%x", reg_idx, reg_dump[reg_idx]);
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}
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printk("************ end dump wl2868c register ************\n");
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dev_err(chip->dev, "************ end dump wl2868c register ************\n");
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if (flags != NULL) {
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*flags = 0;
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}
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@@ -124,8 +134,7 @@ static int wl2868c_get_status(struct regulator_dev *rdev)
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ret = regulator_is_enabled_regmap(rdev);
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if (ret < 0) {
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printk("Failed to read enable register(%d)\n", ret);
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dev_err(chip->dev, "Failed to read enable register(%d)\n", ret);
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return ret;
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}
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@@ -139,7 +148,7 @@ static int wl2868c_get_status(struct regulator_dev *rdev)
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}
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ret = regmap_read(chip->regmap, wl2868c_status_reg, &status);
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if (ret < 0) {
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printk("Failed to read status register(%d)\n", ret);
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dev_err(chip->dev, "Failed to read status register(%d)\n", ret);
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return ret;
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}
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@@ -225,29 +234,47 @@ static int wl2868c_regulator_init(struct wl2868c *chip)
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WL2868C_LDO7_VOUT,
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};
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unsigned int initial_voltage[WL2868C_MAX_REGULATORS] = {
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0x24,//LDO1 1.05V
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unsigned int initial_voltage[LDO_DEVICE_MAX][WL2868C_MAX_REGULATORS] = {
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{0x24,//LDO1 1.05V
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0x5D,//LDO2 1.24V
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0x80,//LDO3 2.8V
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0x80,//LDO4 2.8V
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0x80,//LDO5 2.8V
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0xA2,//LDO6 2.8V
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0xA2,//LDO6 3.0V
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0x30,//LDO7 1.8V
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},//wl2868c init voltage
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{0x24,//LDO1 1.05V
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0x9A,//LDO2 1.24V
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0x80,//LDO3 2.8V
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0x80,//LDO4 2.8V
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0x80,//LDO5 2.8V
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0xB2,//LDO6 3.0V
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0x30,//LDO7 1.8V
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},//fan53870 init voltage
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{0x24,//LDO1 1.05V
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0x6A,//LDO2 1.24V
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0x80,//LDO3 2.8V
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0x80,//LDO4 2.8V
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0x80,//LDO5 2.8V
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0xA0,//LDO6 3.0V
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0x30,//LDO7 1.8V
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},//et5907 init voltage
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};
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/*Disable all ldo output by default*/
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if (ldo_chipid == 0x33)
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{
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ret = regmap_write(chip->regmap, WL2868C_LDO_EN, 0x80);
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}
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else if((ldo_chipid == 0x01) ||(ldo_chipid == 0x00))
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{
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ret = regmap_write(chip->regmap, fan53870_LDO_EN, 0);
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}
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if (first_init_flag == 1) {
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if (ldo_chipid == 0x33)
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{
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ret = regmap_write(chip->regmap, WL2868C_LDO_EN, 0x80);
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}
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else if((ldo_chipid == 0x01) ||(ldo_chipid == 0x00))
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{
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ret = regmap_write(chip->regmap, fan53870_LDO_EN, 0);
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}
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if (ret < 0) {
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printk("Disable all LDO output failed!!!\n");
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return ret;
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if (ret < 0) {
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dev_err(chip->dev, "Disable all LDO output failed!!!\n");
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return ret;
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}
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}
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//ET5907 chipid is 0x00,Fan53870 chipid is 0x01.for change min_uV and step by chip
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@@ -303,23 +330,23 @@ static int wl2868c_regulator_init(struct wl2868c *chip)
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ret = regmap_bulk_read(chip->regmap, ldo_regs[id], vsel_range, 1);
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pr_err("wl2868c_regulator_init: LDO%d, ldo_regs=0x%x default value:0x%x", (id+1),ldo_regs[id],vsel_range[0]);
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if (ret < 0) {
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printk("Failed to read the ldo register\n");
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dev_err(chip->dev, "Failed to read the ldo register\n");
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return ret;
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}
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pr_err("wl2868c_regulator_init: enable_reg0x%x, enable_mask:0x%x", wl2868c_regls_desc[id].enable_reg, wl2868c_regls_desc[id].enable_mask);
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ret = regmap_write(chip->regmap, ldo_regs[id], initial_voltage[id]);
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ret = regmap_write(chip->regmap, ldo_regs[id], initial_voltage[ldo_driver_id][id]);
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if (ret < 0) {
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printk("Failed to write inital voltage register\n");
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dev_err(chip->dev, "Failed to write inital voltage register\n");
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return ret;
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}
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pr_err("wl2868c_regulator_init: LDO%d, initial value:0x%x", (id+1), initial_voltage[id]);
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pr_err("wl2868c_regulator_init: ldo_driver_id=%d LDO%d, initial value:0x%x", ldo_driver_id, (id+1), initial_voltage[ldo_driver_id][id]);
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chip->rdev[id] = devm_regulator_register(chip->dev, rdesc, &config);
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if (IS_ERR(chip->rdev[id])) {
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ret = PTR_ERR(chip->rdev[id]);
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printk("Failed to register regulator(%s):%d\n", chip->rdesc[id]->name, ret);
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dev_err(chip->dev, "Failed to register regulator(%s):%d\n", chip->rdesc[id]->name, ret);
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return ret;
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}
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}
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@@ -334,7 +361,7 @@ static int wl2868c_i2c_probe(struct i2c_client *client, const struct i2c_device_
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int error, cs_gpio, ret;
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chip = devm_kzalloc(dev, sizeof(struct wl2868c), GFP_KERNEL);
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if (!chip) {
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printk("wl2868c_i2c_probe Memory error...\n");
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dev_err(chip->dev, "wl2868c_i2c_probe Memory error...\n");
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return -ENOMEM;
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}
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@@ -343,13 +370,13 @@ static int wl2868c_i2c_probe(struct i2c_client *client, const struct i2c_device_
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cs_gpio = of_get_named_gpio(dev->of_node, "semi,cs-gpios", 0);
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if (cs_gpio > 0) {
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if (!gpio_is_valid(cs_gpio)) {
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printk("Invalid chip select pin\n");
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dev_err(dev, "Invalid chip select pin\n");
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return -EPERM;
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}
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ret = devm_gpio_request_one(dev, cs_gpio, GPIOF_OUT_INIT_HIGH, "wl2868c_cs_pin");
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if (ret) {
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printk("GPIO(%d) request failed(%d)\n", cs_gpio, ret);
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dev_err(dev, "GPIO(%d) request failed(%d)\n", cs_gpio, ret);
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return ret;
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}
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@@ -377,7 +404,7 @@ static int wl2868c_i2c_probe(struct i2c_client *client, const struct i2c_device_
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regmap_read(chip->regmap, WL2868C_CHIP_REV, &ldo_chipid);
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if (IS_ERR(chip->regmap)) {
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error = PTR_ERR(chip->regmap);
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printk("Failed to allocate register map: %d\n",
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dev_err(dev, "Failed to allocate register map: %d\n",
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error);
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return error;
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}
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@@ -386,19 +413,22 @@ static int wl2868c_i2c_probe(struct i2c_client *client, const struct i2c_device_
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ret = regmap_read(chip->regmap, WL2868C_CHIP_REV, &ldo_chipid);
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if (0x33 == ldo_chipid)
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{
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ldo_driver_id = WL2868C_ID;
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dev_info(chip->dev, "wl2868c chipid=:0x%x\n", ldo_chipid);
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}
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else if (0x01 == ldo_chipid)
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{
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ldo_driver_id = FAN53870_ID;
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dev_info(chip->dev, "fan53870 chipid=:0x%x\n", ldo_chipid);
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}
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else if (0x00 == ldo_chipid)
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{
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ldo_driver_id = ET5907_ID;
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dev_info(chip->dev, "et5907 chipid=:0x%x\n", ldo_chipid);
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}
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else
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{
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printk("ldo read chipid error...chipid=:0x%x\n",ldo_chipid);
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dev_err(chip->dev, "ldo read chipid error...chipid=:0x%x\n",ldo_chipid);
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return -ENOMEM;
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}
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@@ -411,10 +441,11 @@ static int wl2868c_i2c_probe(struct i2c_client *client, const struct i2c_device_
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ret = wl2868c_regulator_init(chip);
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if (ret < 0) {
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printk("Failed to init regulator(%d)\n", ret);
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dev_err(chip->dev, "Failed to init regulator(%d)\n", ret);
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return ret;
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}
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dev_info(chip->dev, "wl2868c_i2c_probe Exit...\n");
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first_init_flag = 1;
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return ret;
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}
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@@ -59,4 +59,5 @@
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#define WL2868C_VSEL_SHIFT 0
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#define WL2868C_VSEL_MASK (0xff << 0)
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#define LDO_DEVICE_MAX 3
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#endif /* __WL2868C_REGISTERS_H__ */
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