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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>
pull/958/head
Chris Morgan 2024-08-21 16:54:47 -05:00 committed by Sebastian Reichel
parent 6f5cdb7ec8
commit 6934da720a
1 changed files with 22 additions and 0 deletions
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22
drivers/power/supply/axp20x_usb_power.c
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@ -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);