diff options
| author | Chris Morgan <macromorgan@hotmail.com> | 2024-08-21 16:54:47 -0500 |
|---|---|---|
| committer | Sebastian Reichel <sebastian.reichel@collabora.com> | 2024-08-27 18:12:25 +0200 |
| commit | 6934da720aac7b0feb99d08ff27fd245a962d8d2 (patch) | |
| tree | 14fd719276c5d03b5ab7a90d9587334b9bbe00a6 /drivers/power | |
| parent | 6f5cdb7ec8836bb5e5ab221c2f49e2b170d5a978 (diff) | |
| download | linux-6934da720aac7b0feb99d08ff27fd245a962d8d2.tar.gz linux-6934da720aac7b0feb99d08ff27fd245a962d8d2.tar.bz2 linux-6934da720aac7b0feb99d08ff27fd245a962d8d2.zip | |
power: supply: axp20x_usb_power: add input-current-limit-microamp
Allow users to specify a maximum input current for the device. Some
devices allow up to 3.25A of input current (such as the AXP717), which
may be too much for some implementations.
Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240821215456.962564-7-macroalpha82@gmail.com
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Diffstat (limited to 'drivers/power')
| -rw-r--r-- | drivers/power/supply/axp20x_usb_power.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/power/supply/axp20x_usb_power.c b/drivers/power/supply/axp20x_usb_power.c index cd9e92f2ce71..69fbb5861934 100644 --- a/drivers/power/supply/axp20x_usb_power.c +++ b/drivers/power/supply/axp20x_usb_power.c @@ -80,6 +80,7 @@ struct axp20x_usb_power { struct iio_channel *vbus_v; struct iio_channel *vbus_i; struct delayed_work vbus_detect; + int max_input_cur; unsigned int old_status; unsigned int online; unsigned int num_irqs; @@ -323,6 +324,13 @@ static int axp20x_usb_power_set_input_current_limit(struct axp20x_usb_power *pow if (intval == -1) return -EINVAL; + if (power->max_input_cur && (intval > power->max_input_cur)) { + dev_warn(power->dev, + "reqested current %d clamped to max current %d\n", + intval, power->max_input_cur); + intval = power->max_input_cur; + } + /* * BC1.2 detection can cause a race condition if we try to set a current * limit while it's in progress. When it finishes it will overwrite the @@ -661,6 +669,18 @@ static int axp20x_regmap_field_alloc_optional(struct device *dev, return 0; } +/* Optionally allow users to specify a maximum charging current. */ +static void axp20x_usb_power_parse_dt(struct device *dev, + struct axp20x_usb_power *power) +{ + int ret; + + ret = device_property_read_u32(dev, "input-current-limit-microamp", + &power->max_input_cur); + if (ret) + dev_dbg(dev, "%s() no input-current-limit specified\n", __func__); +} + static int axp20x_usb_power_probe(struct platform_device *pdev) { struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent); @@ -697,6 +717,8 @@ static int axp20x_usb_power_probe(struct platform_device *pdev) if (IS_ERR(power->curr_lim_fld)) return PTR_ERR(power->curr_lim_fld); + axp20x_usb_power_parse_dt(&pdev->dev, power); + ret = axp20x_regmap_field_alloc_optional(&pdev->dev, power->regmap, axp_data->vbus_valid_bit, &power->vbus_valid_bit); |