aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/regulator/max77686.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/regulator/max77686.c')
-rw-r--r--drivers/regulator/max77686.c172
1 files changed, 80 insertions, 92 deletions
diff --git a/drivers/regulator/max77686.c b/drivers/regulator/max77686.c
index f69320e1738f..871b96bcd2d0 100644
--- a/drivers/regulator/max77686.c
+++ b/drivers/regulator/max77686.c
@@ -45,6 +45,23 @@
#define MAX77686_DVS_MINUV 600000
#define MAX77686_DVS_UVSTEP 12500
+/*
+ * Values used for configuring LDOs and bucks.
+ * Forcing low power mode: LDO1, 3-5, 9, 13, 17-26
+ */
+#define MAX77686_LDO_LOWPOWER 0x1
+/*
+ * On/off controlled by PWRREQ:
+ * - LDO2, 6-8, 10-12, 14-16
+ * - buck[1234]
+ */
+#define MAX77686_OFF_PWRREQ 0x1
+/* Low power mode controlled by PWRREQ: All LDOs */
+#define MAX77686_LDO_LOWPOWER_PWRREQ 0x2
+/* Forcing low power mode: buck[234] */
+#define MAX77686_BUCK_LOWPOWER 0x2
+#define MAX77686_NORMAL 0x3
+
#define MAX77686_OPMODE_SHIFT 6
#define MAX77686_OPMODE_BUCK234_SHIFT 4
#define MAX77686_OPMODE_MASK 0x3
@@ -65,23 +82,36 @@ enum max77686_ramp_rate {
};
struct max77686_data {
+ /* Array indexed by regulator id */
unsigned int opmode[MAX77686_REGULATORS];
};
-/* Some BUCKS supports Normal[ON/OFF] mode during suspend */
-static int max77686_buck_set_suspend_disable(struct regulator_dev *rdev)
+static unsigned int max77686_get_opmode_shift(int id)
{
- unsigned int val;
+ switch (id) {
+ case MAX77686_BUCK1:
+ case MAX77686_BUCK5 ... MAX77686_BUCK9:
+ return 0;
+ case MAX77686_BUCK2 ... MAX77686_BUCK4:
+ return MAX77686_OPMODE_BUCK234_SHIFT;
+ default:
+ /* all LDOs */
+ return MAX77686_OPMODE_SHIFT;
+ }
+}
+
+/* Some BUCKs and LDOs supports Normal[ON/OFF] mode during suspend */
+static int max77686_set_suspend_disable(struct regulator_dev *rdev)
+{
+ unsigned int val, shift;
struct max77686_data *max77686 = rdev_get_drvdata(rdev);
int ret, id = rdev_get_id(rdev);
- if (id == MAX77686_BUCK1)
- val = 0x1;
- else
- val = 0x1 << MAX77686_OPMODE_BUCK234_SHIFT;
+ shift = max77686_get_opmode_shift(id);
+ val = MAX77686_OFF_PWRREQ;
ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
- rdev->desc->enable_mask, val);
+ rdev->desc->enable_mask, val << shift);
if (ret)
return ret;
@@ -103,10 +133,10 @@ static int max77686_set_suspend_mode(struct regulator_dev *rdev,
switch (mode) {
case REGULATOR_MODE_IDLE: /* ON in LP Mode */
- val = 0x2 << MAX77686_OPMODE_SHIFT;
+ val = MAX77686_LDO_LOWPOWER_PWRREQ;
break;
case REGULATOR_MODE_NORMAL: /* ON in Normal Mode */
- val = 0x3 << MAX77686_OPMODE_SHIFT;
+ val = MAX77686_NORMAL;
break;
default:
pr_warn("%s: regulator_suspend_mode : 0x%x not supported\n",
@@ -115,7 +145,8 @@ static int max77686_set_suspend_mode(struct regulator_dev *rdev,
}
ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
- rdev->desc->enable_mask, val);
+ rdev->desc->enable_mask,
+ val << MAX77686_OPMODE_SHIFT);
if (ret)
return ret;
@@ -133,13 +164,13 @@ static int max77686_ldo_set_suspend_mode(struct regulator_dev *rdev,
switch (mode) {
case REGULATOR_MODE_STANDBY: /* switch off */
- val = 0x1 << MAX77686_OPMODE_SHIFT;
+ val = MAX77686_OFF_PWRREQ;
break;
case REGULATOR_MODE_IDLE: /* ON in LP Mode */
- val = 0x2 << MAX77686_OPMODE_SHIFT;
+ val = MAX77686_LDO_LOWPOWER_PWRREQ;
break;
case REGULATOR_MODE_NORMAL: /* ON in Normal Mode */
- val = 0x3 << MAX77686_OPMODE_SHIFT;
+ val = MAX77686_NORMAL;
break;
default:
pr_warn("%s: regulator_suspend_mode : 0x%x not supported\n",
@@ -148,7 +179,8 @@ static int max77686_ldo_set_suspend_mode(struct regulator_dev *rdev,
}
ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
- rdev->desc->enable_mask, val);
+ rdev->desc->enable_mask,
+ val << MAX77686_OPMODE_SHIFT);
if (ret)
return ret;
@@ -159,10 +191,17 @@ static int max77686_ldo_set_suspend_mode(struct regulator_dev *rdev,
static int max77686_enable(struct regulator_dev *rdev)
{
struct max77686_data *max77686 = rdev_get_drvdata(rdev);
+ unsigned int shift;
+ int id = rdev_get_id(rdev);
+
+ shift = max77686_get_opmode_shift(id);
+
+ if (max77686->opmode[id] == MAX77686_OFF_PWRREQ)
+ max77686->opmode[id] = MAX77686_NORMAL;
return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
rdev->desc->enable_mask,
- max77686->opmode[rdev_get_id(rdev)]);
+ max77686->opmode[id] << shift);
}
static int max77686_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
@@ -212,6 +251,7 @@ static struct regulator_ops max77686_ldo_ops = {
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.set_voltage_time_sel = regulator_set_voltage_time_sel,
.set_suspend_mode = max77686_ldo_set_suspend_mode,
+ .set_suspend_disable = max77686_set_suspend_disable,
};
static struct regulator_ops max77686_buck1_ops = {
@@ -223,7 +263,7 @@ static struct regulator_ops max77686_buck1_ops = {
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.set_voltage_time_sel = regulator_set_voltage_time_sel,
- .set_suspend_disable = max77686_buck_set_suspend_disable,
+ .set_suspend_disable = max77686_set_suspend_disable,
};
static struct regulator_ops max77686_buck_dvs_ops = {
@@ -236,11 +276,13 @@ static struct regulator_ops max77686_buck_dvs_ops = {
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.set_voltage_time_sel = regulator_set_voltage_time_sel,
.set_ramp_delay = max77686_set_ramp_delay,
- .set_suspend_disable = max77686_buck_set_suspend_disable,
+ .set_suspend_disable = max77686_set_suspend_disable,
};
#define regulator_desc_ldo(num) { \
.name = "LDO"#num, \
+ .of_match = of_match_ptr("LDO"#num), \
+ .regulators_node = of_match_ptr("voltage-regulators"), \
.id = MAX77686_LDO##num, \
.ops = &max77686_ops, \
.type = REGULATOR_VOLTAGE, \
@@ -257,6 +299,8 @@ static struct regulator_ops max77686_buck_dvs_ops = {
}
#define regulator_desc_lpm_ldo(num) { \
.name = "LDO"#num, \
+ .of_match = of_match_ptr("LDO"#num), \
+ .regulators_node = of_match_ptr("voltage-regulators"), \
.id = MAX77686_LDO##num, \
.ops = &max77686_ldo_ops, \
.type = REGULATOR_VOLTAGE, \
@@ -273,6 +317,8 @@ static struct regulator_ops max77686_buck_dvs_ops = {
}
#define regulator_desc_ldo_low(num) { \
.name = "LDO"#num, \
+ .of_match = of_match_ptr("LDO"#num), \
+ .regulators_node = of_match_ptr("voltage-regulators"), \
.id = MAX77686_LDO##num, \
.ops = &max77686_ldo_ops, \
.type = REGULATOR_VOLTAGE, \
@@ -289,6 +335,8 @@ static struct regulator_ops max77686_buck_dvs_ops = {
}
#define regulator_desc_ldo1_low(num) { \
.name = "LDO"#num, \
+ .of_match = of_match_ptr("LDO"#num), \
+ .regulators_node = of_match_ptr("voltage-regulators"), \
.id = MAX77686_LDO##num, \
.ops = &max77686_ops, \
.type = REGULATOR_VOLTAGE, \
@@ -305,6 +353,8 @@ static struct regulator_ops max77686_buck_dvs_ops = {
}
#define regulator_desc_buck(num) { \
.name = "BUCK"#num, \
+ .of_match = of_match_ptr("BUCK"#num), \
+ .regulators_node = of_match_ptr("voltage-regulators"), \
.id = MAX77686_BUCK##num, \
.ops = &max77686_ops, \
.type = REGULATOR_VOLTAGE, \
@@ -320,6 +370,8 @@ static struct regulator_ops max77686_buck_dvs_ops = {
}
#define regulator_desc_buck1(num) { \
.name = "BUCK"#num, \
+ .of_match = of_match_ptr("BUCK"#num), \
+ .regulators_node = of_match_ptr("voltage-regulators"), \
.id = MAX77686_BUCK##num, \
.ops = &max77686_buck1_ops, \
.type = REGULATOR_VOLTAGE, \
@@ -335,6 +387,8 @@ static struct regulator_ops max77686_buck_dvs_ops = {
}
#define regulator_desc_buck_dvs(num) { \
.name = "BUCK"#num, \
+ .of_match = of_match_ptr("BUCK"#num), \
+ .regulators_node = of_match_ptr("voltage-regulators"), \
.id = MAX77686_BUCK##num, \
.ops = &max77686_buck_dvs_ops, \
.type = REGULATOR_VOLTAGE, \
@@ -350,7 +404,7 @@ static struct regulator_ops max77686_buck_dvs_ops = {
<< MAX77686_OPMODE_BUCK234_SHIFT, \
}
-static struct regulator_desc regulators[] = {
+static const struct regulator_desc regulators[] = {
regulator_desc_ldo1_low(1),
regulator_desc_ldo_low(2),
regulator_desc_ldo(3),
@@ -388,103 +442,37 @@ static struct regulator_desc regulators[] = {
regulator_desc_buck(9),
};
-#ifdef CONFIG_OF
-static int max77686_pmic_dt_parse_pdata(struct platform_device *pdev,
- struct max77686_platform_data *pdata)
-{
- struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
- struct device_node *pmic_np, *regulators_np;
- struct max77686_regulator_data *rdata;
- struct of_regulator_match rmatch = { };
- unsigned int i;
-
- pmic_np = iodev->dev->of_node;
- regulators_np = of_get_child_by_name(pmic_np, "voltage-regulators");
- if (!regulators_np) {
- dev_err(&pdev->dev, "could not find regulators sub-node\n");
- return -EINVAL;
- }
-
- pdata->num_regulators = ARRAY_SIZE(regulators);
- rdata = devm_kzalloc(&pdev->dev, sizeof(*rdata) *
- pdata->num_regulators, GFP_KERNEL);
- if (!rdata) {
- of_node_put(regulators_np);
- return -ENOMEM;
- }
-
- for (i = 0; i < pdata->num_regulators; i++) {
- rmatch.name = regulators[i].name;
- rmatch.init_data = NULL;
- rmatch.of_node = NULL;
- of_regulator_match(&pdev->dev, regulators_np, &rmatch, 1);
- rdata[i].initdata = rmatch.init_data;
- rdata[i].of_node = rmatch.of_node;
- }
-
- pdata->regulators = rdata;
- of_node_put(regulators_np);
-
- return 0;
-}
-#else
-static int max77686_pmic_dt_parse_pdata(struct platform_device *pdev,
- struct max77686_platform_data *pdata)
-{
- return 0;
-}
-#endif /* CONFIG_OF */
-
static int max77686_pmic_probe(struct platform_device *pdev)
{
struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
- struct max77686_platform_data *pdata = dev_get_platdata(iodev->dev);
struct max77686_data *max77686;
- int i, ret = 0;
+ int i;
struct regulator_config config = { };
dev_dbg(&pdev->dev, "%s\n", __func__);
- if (!pdata) {
- dev_err(&pdev->dev, "no platform data found for regulator\n");
- return -ENODEV;
- }
-
- if (iodev->dev->of_node) {
- ret = max77686_pmic_dt_parse_pdata(pdev, pdata);
- if (ret)
- return ret;
- }
-
- if (pdata->num_regulators != MAX77686_REGULATORS) {
- dev_err(&pdev->dev,
- "Invalid initial data for regulator's initialiation\n");
- return -EINVAL;
- }
-
max77686 = devm_kzalloc(&pdev->dev, sizeof(struct max77686_data),
GFP_KERNEL);
if (!max77686)
return -ENOMEM;
- config.dev = &pdev->dev;
+ config.dev = iodev->dev;
config.regmap = iodev->regmap;
config.driver_data = max77686;
platform_set_drvdata(pdev, max77686);
for (i = 0; i < MAX77686_REGULATORS; i++) {
struct regulator_dev *rdev;
+ int id = regulators[i].id;
- config.init_data = pdata->regulators[i].initdata;
- config.of_node = pdata->regulators[i].of_node;
-
- max77686->opmode[i] = regulators[i].enable_mask;
+ max77686->opmode[id] = MAX77686_NORMAL;
rdev = devm_regulator_register(&pdev->dev,
&regulators[i], &config);
if (IS_ERR(rdev)) {
+ int ret = PTR_ERR(rdev);
dev_err(&pdev->dev,
- "regulator init failed for %d\n", i);
- return PTR_ERR(rdev);
+ "regulator init failed for %d: %d\n", i, ret);
+ return ret;
}
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.