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| author | Bryan O'Donoghue <bryan.odonoghue@linaro.org> | 2021-04-27 14:07:11 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2021-05-10 13:06:50 +0100 |
| commit | 67823d9dadd4dddee4b6bd075f6852b6ade5604a (patch) | |
| tree | 20080e1937ff02b3fb47845781ea530acbca7e9d | |
| parent | 6efb943b8616ec53a5e444193dccf1af9ad627b5 (diff) | |
| download | linux-67823d9dadd4dddee4b6bd075f6852b6ade5604a.tar.gz linux-67823d9dadd4dddee4b6bd075f6852b6ade5604a.tar.bz2 linux-67823d9dadd4dddee4b6bd075f6852b6ade5604a.zip | |
regulator: Add a routine to set the current limit for QCOM PMIC VBUS
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@kernel.org>
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Link: https://lore.kernel.org/r/20210427130712.2005456-2-bryan.odonoghue@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
| -rw-r--r-- | drivers/regulator/qcom_usb_vbus-regulator.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/regulator/qcom_usb_vbus-regulator.c b/drivers/regulator/qcom_usb_vbus-regulator.c index 457788b50572..2e627c2b6c51 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; |