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path: root/drivers/regulator/max8998.c
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Diffstat (limited to 'drivers/regulator/max8998.c')
-rw-r--r--drivers/regulator/max8998.c304
1 files changed, 179 insertions, 125 deletions
diff --git a/drivers/regulator/max8998.c b/drivers/regulator/max8998.c
index 1f0df4046b8..961091b4655 100644
--- a/drivers/regulator/max8998.c
+++ b/drivers/regulator/max8998.c
@@ -28,8 +28,11 @@
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
+#include <linux/regulator/of_regulator.h>
#include <linux/mfd/max8998.h>
#include <linux/mfd/max8998-private.h>
@@ -37,7 +40,6 @@ struct max8998_data {
struct device *dev;
struct max8998_dev *iodev;
int num_regulators;
- struct regulator_dev **rdev;
u8 buck1_vol[4]; /* voltages for selection */
u8 buck2_vol[2];
unsigned int buck1_idx; /* index to last changed voltage */
@@ -65,7 +67,7 @@ static const struct voltage_map_desc ldo9_voltage_map_desc = {
.min = 2800000, .step = 100000, .max = 3100000,
};
static const struct voltage_map_desc ldo10_voltage_map_desc = {
- .min = 95000, .step = 50000, .max = 1300000,
+ .min = 950000, .step = 50000, .max = 1300000,
};
static const struct voltage_map_desc ldo1213_voltage_map_desc = {
.min = 800000, .step = 100000, .max = 3300000,
@@ -311,25 +313,13 @@ static int max8998_set_voltage_buck_sel(struct regulator_dev *rdev,
dev_get_platdata(max8998->iodev->dev);
struct i2c_client *i2c = max8998->iodev->i2c;
int buck = rdev_get_id(rdev);
- int reg, shift = 0, mask, ret;
- int j, previous_sel;
+ int reg, shift = 0, mask, ret, j;
static u8 buck1_last_val;
ret = max8998_get_voltage_register(rdev, &reg, &shift, &mask);
if (ret)
return ret;
- previous_sel = max8998_get_voltage_sel(rdev);
-
- /* Check if voltage needs to be changed */
- /* if previous_voltage equal new voltage, return */
- if (previous_sel == selector) {
- dev_dbg(max8998->dev, "No voltage change, old:%d, new:%d\n",
- regulator_list_voltage_linear(rdev, previous_sel),
- regulator_list_voltage_linear(rdev, selector));
- return ret;
- }
-
switch (buck) {
case MAX8998_BUCK1:
dev_dbg(max8998->dev,
@@ -601,13 +591,13 @@ static struct regulator_desc regulators[] = {
.type = REGULATOR_VOLTAGE,
.owner = THIS_MODULE,
}, {
- .name = "EN32KHz AP",
+ .name = "EN32KHz-AP",
.id = MAX8998_EN32KHZ_AP,
.ops = &max8998_others_ops,
.type = REGULATOR_VOLTAGE,
.owner = THIS_MODULE,
}, {
- .name = "EN32KHz CP",
+ .name = "EN32KHz-CP",
.id = MAX8998_EN32KHZ_CP,
.ops = &max8998_others_ops,
.type = REGULATOR_VOLTAGE,
@@ -633,32 +623,150 @@ static struct regulator_desc regulators[] = {
}
};
+static int max8998_pmic_dt_parse_dvs_gpio(struct max8998_dev *iodev,
+ struct max8998_platform_data *pdata,
+ struct device_node *pmic_np)
+{
+ int gpio;
+
+ gpio = of_get_named_gpio(pmic_np, "max8998,pmic-buck1-dvs-gpios", 0);
+ if (!gpio_is_valid(gpio)) {
+ dev_err(iodev->dev, "invalid buck1 gpio[0]: %d\n", gpio);
+ return -EINVAL;
+ }
+ pdata->buck1_set1 = gpio;
+
+ gpio = of_get_named_gpio(pmic_np, "max8998,pmic-buck1-dvs-gpios", 1);
+ if (!gpio_is_valid(gpio)) {
+ dev_err(iodev->dev, "invalid buck1 gpio[1]: %d\n", gpio);
+ return -EINVAL;
+ }
+ pdata->buck1_set2 = gpio;
+
+ gpio = of_get_named_gpio(pmic_np, "max8998,pmic-buck2-dvs-gpio", 0);
+ if (!gpio_is_valid(gpio)) {
+ dev_err(iodev->dev, "invalid buck 2 gpio: %d\n", gpio);
+ return -EINVAL;
+ }
+ pdata->buck2_set3 = gpio;
+
+ return 0;
+}
+
+static int max8998_pmic_dt_parse_pdata(struct max8998_dev *iodev,
+ struct max8998_platform_data *pdata)
+{
+ struct device_node *pmic_np = iodev->dev->of_node;
+ struct device_node *regulators_np, *reg_np;
+ struct max8998_regulator_data *rdata;
+ unsigned int i;
+ int ret;
+
+ regulators_np = of_get_child_by_name(pmic_np, "regulators");
+ if (!regulators_np) {
+ dev_err(iodev->dev, "could not find regulators sub-node\n");
+ return -EINVAL;
+ }
+
+ /* count the number of regulators to be supported in pmic */
+ pdata->num_regulators = of_get_child_count(regulators_np);
+
+ rdata = devm_kzalloc(iodev->dev, sizeof(*rdata) *
+ pdata->num_regulators, GFP_KERNEL);
+ if (!rdata) {
+ of_node_put(regulators_np);
+ return -ENOMEM;
+ }
+
+ pdata->regulators = rdata;
+ for (i = 0; i < ARRAY_SIZE(regulators); ++i) {
+ reg_np = of_get_child_by_name(regulators_np,
+ regulators[i].name);
+ if (!reg_np)
+ continue;
+
+ rdata->id = regulators[i].id;
+ rdata->initdata = of_get_regulator_init_data(
+ iodev->dev, reg_np);
+ rdata->reg_node = reg_np;
+ ++rdata;
+ }
+ pdata->num_regulators = rdata - pdata->regulators;
+
+ of_node_put(reg_np);
+ of_node_put(regulators_np);
+
+ ret = max8998_pmic_dt_parse_dvs_gpio(iodev, pdata, pmic_np);
+ if (ret)
+ return -EINVAL;
+
+ if (of_find_property(pmic_np, "max8998,pmic-buck-voltage-lock", NULL))
+ pdata->buck_voltage_lock = true;
+
+ ret = of_property_read_u32(pmic_np,
+ "max8998,pmic-buck1-default-dvs-idx",
+ &pdata->buck1_default_idx);
+ if (!ret && pdata->buck1_default_idx >= 4) {
+ pdata->buck1_default_idx = 0;
+ dev_warn(iodev->dev, "invalid value for default dvs index, using 0 instead\n");
+ }
+
+ ret = of_property_read_u32(pmic_np,
+ "max8998,pmic-buck2-default-dvs-idx",
+ &pdata->buck2_default_idx);
+ if (!ret && pdata->buck2_default_idx >= 2) {
+ pdata->buck2_default_idx = 0;
+ dev_warn(iodev->dev, "invalid value for default dvs index, using 0 instead\n");
+ }
+
+ ret = of_property_read_u32_array(pmic_np,
+ "max8998,pmic-buck1-dvs-voltage",
+ pdata->buck1_voltage,
+ ARRAY_SIZE(pdata->buck1_voltage));
+ if (ret) {
+ dev_err(iodev->dev, "buck1 voltages not specified\n");
+ return -EINVAL;
+ }
+
+ ret = of_property_read_u32_array(pmic_np,
+ "max8998,pmic-buck2-dvs-voltage",
+ pdata->buck2_voltage,
+ ARRAY_SIZE(pdata->buck2_voltage));
+ if (ret) {
+ dev_err(iodev->dev, "buck2 voltages not specified\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
static 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 max8998_platform_data *pdata = iodev->pdata;
struct regulator_config config = { };
- struct regulator_dev **rdev;
+ struct regulator_dev *rdev;
struct max8998_data *max8998;
struct i2c_client *i2c;
- int i, ret, size;
+ int i, ret;
+ unsigned int v;
if (!pdata) {
dev_err(pdev->dev.parent, "No platform init data supplied\n");
return -ENODEV;
}
+ if (IS_ENABLED(CONFIG_OF) && iodev->dev->of_node) {
+ ret = max8998_pmic_dt_parse_pdata(iodev, pdata);
+ if (ret)
+ return ret;
+ }
+
max8998 = devm_kzalloc(&pdev->dev, sizeof(struct max8998_data),
GFP_KERNEL);
if (!max8998)
return -ENOMEM;
- size = sizeof(struct regulator_dev *) * pdata->num_regulators;
- max8998->rdev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
- if (!max8998->rdev)
- return -ENOMEM;
-
- rdev = max8998->rdev;
max8998->dev = &pdev->dev;
max8998->iodev = iodev;
max8998->num_regulators = pdata->num_regulators;
@@ -677,17 +785,17 @@ static int max8998_pmic_probe(struct platform_device *pdev)
gpio_is_valid(pdata->buck1_set2)) {
/* Check if SET1 is not equal to 0 */
if (!pdata->buck1_set1) {
- printk(KERN_ERR "MAX8998 SET1 GPIO defined as 0 !\n");
+ dev_err(&pdev->dev,
+ "MAX8998 SET1 GPIO defined as 0 !\n");
WARN_ON(!pdata->buck1_set1);
- ret = -EIO;
- goto err_out;
+ return -EIO;
}
/* Check if SET2 is not equal to 0 */
if (!pdata->buck1_set2) {
- printk(KERN_ERR "MAX8998 SET2 GPIO defined as 0 !\n");
+ dev_err(&pdev->dev,
+ "MAX8998 SET2 GPIO defined as 0 !\n");
WARN_ON(!pdata->buck1_set2);
- ret = -EIO;
- goto err_out;
+ return -EIO;
}
gpio_request(pdata->buck1_set1, "MAX8998 BUCK1_SET1");
@@ -698,88 +806,49 @@ static int max8998_pmic_probe(struct platform_device *pdev)
gpio_request(pdata->buck1_set2, "MAX8998 BUCK1_SET2");
gpio_direction_output(pdata->buck1_set2,
(max8998->buck1_idx >> 1) & 0x1);
- /* Set predefined value for BUCK1 register 1 */
- i = 0;
- while (buck12_voltage_map_desc.min +
- buck12_voltage_map_desc.step*i
- < pdata->buck1_voltage1)
- i++;
- max8998->buck1_vol[0] = i;
- ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE1, i);
- if (ret)
- goto err_out;
-
- /* Set predefined value for BUCK1 register 2 */
- i = 0;
- while (buck12_voltage_map_desc.min +
- buck12_voltage_map_desc.step*i
- < pdata->buck1_voltage2)
- i++;
-
- max8998->buck1_vol[1] = i;
- ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE2, i);
- if (ret)
- goto err_out;
-
- /* Set predefined value for BUCK1 register 3 */
- i = 0;
- while (buck12_voltage_map_desc.min +
- buck12_voltage_map_desc.step*i
- < pdata->buck1_voltage3)
- i++;
-
- max8998->buck1_vol[2] = i;
- ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE3, i);
- if (ret)
- goto err_out;
-
- /* Set predefined value for BUCK1 register 4 */
- i = 0;
- while (buck12_voltage_map_desc.min +
- buck12_voltage_map_desc.step*i
- < pdata->buck1_voltage4)
- i++;
-
- max8998->buck1_vol[3] = i;
- ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE4, i);
- if (ret)
- goto err_out;
+ /* Set predefined values for BUCK1 registers */
+ for (v = 0; v < ARRAY_SIZE(pdata->buck1_voltage); ++v) {
+ i = 0;
+ while (buck12_voltage_map_desc.min +
+ buck12_voltage_map_desc.step*i
+ < pdata->buck1_voltage[v])
+ i++;
+
+ max8998->buck1_vol[v] = i;
+ ret = max8998_write_reg(i2c,
+ MAX8998_REG_BUCK1_VOLTAGE1 + v, i);
+ if (ret)
+ return ret;
+ }
}
if (gpio_is_valid(pdata->buck2_set3)) {
/* Check if SET3 is not equal to 0 */
if (!pdata->buck2_set3) {
- printk(KERN_ERR "MAX8998 SET3 GPIO defined as 0 !\n");
+ dev_err(&pdev->dev,
+ "MAX8998 SET3 GPIO defined as 0 !\n");
WARN_ON(!pdata->buck2_set3);
- ret = -EIO;
- goto err_out;
+ return -EIO;
}
gpio_request(pdata->buck2_set3, "MAX8998 BUCK2_SET3");
gpio_direction_output(pdata->buck2_set3,
max8998->buck2_idx & 0x1);
- /* BUCK2 register 1 */
- i = 0;
- while (buck12_voltage_map_desc.min +
- buck12_voltage_map_desc.step*i
- < pdata->buck2_voltage1)
- i++;
- max8998->buck2_vol[0] = i;
- ret = max8998_write_reg(i2c, MAX8998_REG_BUCK2_VOLTAGE1, i);
- if (ret)
- goto err_out;
-
- /* BUCK2 register 2 */
- i = 0;
- while (buck12_voltage_map_desc.min +
- buck12_voltage_map_desc.step*i
- < pdata->buck2_voltage2)
- i++;
- max8998->buck2_vol[1] = i;
- ret = max8998_write_reg(i2c, MAX8998_REG_BUCK2_VOLTAGE2, i);
- if (ret)
- goto err_out;
+ /* Set predefined values for BUCK2 registers */
+ for (v = 0; v < ARRAY_SIZE(pdata->buck2_voltage); ++v) {
+ i = 0;
+ while (buck12_voltage_map_desc.min +
+ buck12_voltage_map_desc.step*i
+ < pdata->buck2_voltage[v])
+ i++;
+
+ max8998->buck2_vol[v] = i;
+ ret = max8998_write_reg(i2c,
+ MAX8998_REG_BUCK2_VOLTAGE1 + v, i);
+ if (ret)
+ return ret;
+ }
}
for (i = 0; i < pdata->num_regulators; i++) {
@@ -797,36 +866,22 @@ static int max8998_pmic_probe(struct platform_device *pdev)
}
config.dev = max8998->dev;
+ config.of_node = pdata->regulators[i].reg_node;
config.init_data = pdata->regulators[i].initdata;
config.driver_data = max8998;
- rdev[i] = regulator_register(&regulators[index], &config);
- if (IS_ERR(rdev[i])) {
- ret = PTR_ERR(rdev[i]);
- dev_err(max8998->dev, "regulator init failed\n");
- rdev[i] = NULL;
- goto err;
+ rdev = devm_regulator_register(&pdev->dev, &regulators[index],
+ &config);
+ if (IS_ERR(rdev)) {
+ ret = PTR_ERR(rdev);
+ dev_err(max8998->dev, "regulator %s init failed (%d)\n",
+ regulators[index].name, ret);
+ return ret;
}
}
return 0;
-err:
- while (--i >= 0)
- regulator_unregister(rdev[i]);
-err_out:
- return ret;
-}
-
-static int 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++)
- regulator_unregister(rdev[i]);
- return 0;
}
static const struct platform_device_id max8998_pmic_id[] = {
@@ -842,7 +897,6 @@ static struct platform_driver max8998_pmic_driver = {
.owner = THIS_MODULE,
},
.probe = max8998_pmic_probe,
- .remove = max8998_pmic_remove,
.id_table = max8998_pmic_id,
};
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 19:19:37 +0000