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iio: adc: Revert "axp288: Drop bogus AXP288_ADC_TS_PIN_CTRL register modifications"
Inheriting the ADC BIAS current settings from the BIOS instead of
hardcoding then causes the AXP288 to disable charging (I think it
mis-detects an overheated battery) on at least one model tablet.
So lets go back to hard coding the values, this reverts
commit fa2849e964
("iio: adc: axp288: Drop bogus
AXP288_ADC_TS_PIN_CTRL register modifications"), fixing charging not
working on the model tablet in question.
The exact cause is not fully understood, hence the revert to a known working
state.
Cc: stable@vger.kernel.org
Reported-by: Umberto Ixxo <sfumato1977@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
parent
be2ea53330
commit
631b010abc
@ -28,6 +28,8 @@
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#include <linux/iio/driver.h>
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#define AXP288_ADC_EN_MASK 0xF1
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#define AXP288_ADC_TS_PIN_GPADC 0xF2
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#define AXP288_ADC_TS_PIN_ON 0xF3
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enum axp288_adc_id {
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AXP288_ADC_TS,
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@ -121,6 +123,16 @@ static int axp288_adc_read_channel(int *val, unsigned long address,
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return IIO_VAL_INT;
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}
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static int axp288_adc_set_ts(struct regmap *regmap, unsigned int mode,
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unsigned long address)
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{
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/* channels other than GPADC do not need to switch TS pin */
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if (address != AXP288_GP_ADC_H)
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return 0;
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return regmap_write(regmap, AXP288_ADC_TS_PIN_CTRL, mode);
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}
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static int axp288_adc_read_raw(struct iio_dev *indio_dev,
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struct iio_chan_spec const *chan,
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int *val, int *val2, long mask)
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@ -131,7 +143,16 @@ static int axp288_adc_read_raw(struct iio_dev *indio_dev,
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mutex_lock(&indio_dev->mlock);
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switch (mask) {
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case IIO_CHAN_INFO_RAW:
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if (axp288_adc_set_ts(info->regmap, AXP288_ADC_TS_PIN_GPADC,
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chan->address)) {
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dev_err(&indio_dev->dev, "GPADC mode\n");
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ret = -EINVAL;
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break;
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}
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ret = axp288_adc_read_channel(val, chan->address, info->regmap);
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if (axp288_adc_set_ts(info->regmap, AXP288_ADC_TS_PIN_ON,
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chan->address))
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dev_err(&indio_dev->dev, "TS pin restore\n");
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break;
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default:
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ret = -EINVAL;
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@ -141,6 +162,15 @@ static int axp288_adc_read_raw(struct iio_dev *indio_dev,
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return ret;
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}
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static int axp288_adc_set_state(struct regmap *regmap)
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{
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/* ADC should be always enabled for internal FG to function */
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if (regmap_write(regmap, AXP288_ADC_TS_PIN_CTRL, AXP288_ADC_TS_PIN_ON))
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return -EIO;
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return regmap_write(regmap, AXP20X_ADC_EN1, AXP288_ADC_EN_MASK);
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}
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static const struct iio_info axp288_adc_iio_info = {
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.read_raw = &axp288_adc_read_raw,
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.driver_module = THIS_MODULE,
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@ -169,7 +199,7 @@ static int axp288_adc_probe(struct platform_device *pdev)
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* Set ADC to enabled state at all time, including system suspend.
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* otherwise internal fuel gauge functionality may be affected.
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*/
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ret = regmap_write(info->regmap, AXP20X_ADC_EN1, AXP288_ADC_EN_MASK);
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ret = axp288_adc_set_state(axp20x->regmap);
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if (ret) {
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dev_err(&pdev->dev, "unable to enable ADC device\n");
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return ret;
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