From: Billy Tsai Date: Fri, 20 Mar 2026 05:46:35 +0000 (+0800) Subject: iio: adc: Add battery channel definition for ADC X-Git-Tag: v7.1-rc1~17^2~120^2~55 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a28069be7d34597159840c4a0dfd3886787455db;p=thirdparty%2Fkernel%2Fstable.git iio: adc: Add battery channel definition for ADC Defines a constant for the battery sensing channel, typically the last channel of the ADC. Clarifies channel usage and improves code readability. Signed-off-by: Billy Tsai Signed-off-by: Jonathan Cameron --- diff --git a/drivers/iio/adc/aspeed_adc.c b/drivers/iio/adc/aspeed_adc.c index 4be44c524b4da..8eebaa3dc5348 100644 --- a/drivers/iio/adc/aspeed_adc.c +++ b/drivers/iio/adc/aspeed_adc.c @@ -75,6 +75,8 @@ #define ASPEED_ADC_INIT_POLLING_TIME 500 #define ASPEED_ADC_INIT_TIMEOUT 500000 +/* Battery sensing is typically on the last channel */ +#define ASPEED_ADC_BATTERY_CHANNEL 7 /* * When the sampling rate is too high, the ADC may not have enough charging * time, resulting in a low voltage value. Thus, the default uses a slow @@ -285,7 +287,7 @@ static int aspeed_adc_read_raw(struct iio_dev *indio_dev, switch (mask) { case IIO_CHAN_INFO_RAW: - if (data->battery_sensing && chan->channel == 7) { + if (data->battery_sensing && chan->channel == ASPEED_ADC_BATTERY_CHANNEL) { adc_engine_control_reg_val = readl(data->base + ASPEED_REG_ENGINE_CONTROL); writel(adc_engine_control_reg_val | @@ -309,7 +311,7 @@ static int aspeed_adc_read_raw(struct iio_dev *indio_dev, return IIO_VAL_INT; case IIO_CHAN_INFO_OFFSET: - if (data->battery_sensing && chan->channel == 7) + if (data->battery_sensing && chan->channel == ASPEED_ADC_BATTERY_CHANNEL) *val = (data->cv * data->battery_mode_gain.mult) / data->battery_mode_gain.div; else