Add hooks to regulator_get_current_limit_regmap() and
regulator_set_current_limit_regmap() with an accompanying map of amperages.
This lets us use the existing helper functions to map requested current
settings to register bit-map/indicies.
This change is required to elevate the default 2 Amps set by the bootloader
to 3 Amps or indeed to constrain the value lower as the system design may
dictate.
The valid range is 500 mA to 3 A in increments of 500 mA.
Cc: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@xxxxxxxxxx>
---
drivers/regulator/qcom_usb_vbus-regulator.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/drivers/regulator/qcom_usb_vbus-regulator.c b/drivers/regulator/qcom_usb_vbus-regulator.c
index 457788b505720..2e627c2b6c512 100644
--- a/drivers/regulator/qcom_usb_vbus-regulator.c
+++ b/drivers/regulator/qcom_usb_vbus-regulator.c
@@ -16,13 +16,21 @@
#define CMD_OTG 0x40
#define OTG_EN BIT(0)
+#define OTG_CURRENT_LIMIT_CFG 0x52
+#define OTG_CURRENT_LIMIT_MASK GENMASK(2, 0)
#define OTG_CFG 0x53
#define OTG_EN_SRC_CFG BIT(1)
+static const unsigned int curr_table[] = {
+ 500000, 1000000, 1500000, 2000000, 2500000, 3000000,
+};
+
static const struct regulator_ops qcom_usb_vbus_reg_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
+ .get_current_limit = regulator_get_current_limit_regmap,
+ .set_current_limit = regulator_set_current_limit_regmap,
};
static struct regulator_desc qcom_usb_vbus_rdesc = {
@@ -30,6 +38,8 @@ static struct regulator_desc qcom_usb_vbus_rdesc = {
.ops = &qcom_usb_vbus_reg_ops,
.owner = THIS_MODULE,
.type = REGULATOR_VOLTAGE,
+ .curr_table = curr_table,
+ .n_current_limits = ARRAY_SIZE(curr_table),
};
static int qcom_usb_vbus_regulator_probe(struct platform_device *pdev)
@@ -61,6 +71,8 @@ static int qcom_usb_vbus_regulator_probe(struct platform_device *pdev)
qcom_usb_vbus_rdesc.enable_reg = base + CMD_OTG;
qcom_usb_vbus_rdesc.enable_mask = OTG_EN;
+ qcom_usb_vbus_rdesc.csel_reg = base + OTG_CURRENT_LIMIT_CFG;
+ qcom_usb_vbus_rdesc.csel_mask = OTG_CURRENT_LIMIT_MASK;
config.dev = dev;
config.init_data = init_data;
config.of_node = dev->of_node;
--
2.30.1
