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iio: adc: mt6370: Fix ibus and ibat scaling value of some specific vendor ID chips

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The scale value of ibus and ibat on the datasheet is incorrect due to the
customer report after the experimentation with some specific vendor ID
chips.

Fixes: c1404d1b65 ("iio: adc: mt6370: Add MediaTek MT6370 support")
Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com>
Reviewed-by: Alexandre Mergnat <amergnat@baylibre.com>
Link: https://lore.kernel.org/r/1681122862-1994-1-git-send-email-chiaen_wu@richtek.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
ChiaEn Wu 2023-04-10 18:34:22 +08:00 committed by Jonathan Cameron
parent 20f291b88e
commit 00ffdd6fa9
1 changed files with 51 additions and 2 deletions
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53
drivers/iio/adc/mt6370-adc.c
View File

@ -19,6 +19,7 @@
#include <dt-bindings/iio/adc/mediatek,mt6370_adc.h>
#define MT6370_REG_DEV_INFO 0x100
#define MT6370_REG_CHG_CTRL3 0x113
#define MT6370_REG_CHG_CTRL7 0x117
#define MT6370_REG_CHG_ADC 0x121
@ -27,6 +28,7 @@
#define MT6370_ADC_START_MASK BIT(0)
#define MT6370_ADC_IN_SEL_MASK GENMASK(7, 4)
#define MT6370_AICR_ICHG_MASK GENMASK(7, 2)
#define MT6370_VENID_MASK GENMASK(7, 4)
#define MT6370_AICR_100_mA 0x0
#define MT6370_AICR_150_mA 0x1
@ -47,6 +49,10 @@
#define ADC_CONV_TIME_MS 35
#define ADC_CONV_POLLING_TIME_US 1000
#define MT6370_VID_RT5081 0x8
#define MT6370_VID_RT5081A 0xA
#define MT6370_VID_MT6370 0xE
struct mt6370_adc_data {
struct device *dev;
struct regmap *regmap;
@ -55,6 +61,7 @@ struct mt6370_adc_data {
* from being read at the same time.
*/
struct mutex adc_lock;
unsigned int vid;
};
static int mt6370_adc_read_channel(struct mt6370_adc_data *priv, int chan,
@ -98,6 +105,30 @@ static int mt6370_adc_read_channel(struct mt6370_adc_data *priv, int chan,
return ret;
}
static int mt6370_adc_get_ibus_scale(struct mt6370_adc_data *priv)
{
switch (priv->vid) {
case MT6370_VID_RT5081:
case MT6370_VID_RT5081A:
case MT6370_VID_MT6370:
return 3350;
default:
return 3875;
}
}
static int mt6370_adc_get_ibat_scale(struct mt6370_adc_data *priv)
{
switch (priv->vid) {
case MT6370_VID_RT5081:
case MT6370_VID_RT5081A:
case MT6370_VID_MT6370:
return 2680;
default:
return 3870;
}
}
static int mt6370_adc_read_scale(struct mt6370_adc_data *priv,
int chan, int *val1, int *val2)
{
@ -123,7 +154,7 @@ static int mt6370_adc_read_scale(struct mt6370_adc_data *priv,
case MT6370_AICR_250_mA:
case MT6370_AICR_300_mA:
case MT6370_AICR_350_mA:
*val1 = 3350;
*val1 = mt6370_adc_get_ibus_scale(priv);
break;
default:
*val1 = 5000;
@ -150,7 +181,7 @@ static int mt6370_adc_read_scale(struct mt6370_adc_data *priv,
case MT6370_ICHG_600_mA:
case MT6370_ICHG_700_mA:
case MT6370_ICHG_800_mA:
*val1 = 2680;
*val1 = mt6370_adc_get_ibat_scale(priv);
break;
default:
*val1 = 5000;
@ -251,6 +282,20 @@ static const struct iio_chan_spec mt6370_adc_channels[] = {
MT6370_ADC_CHAN(TEMP_JC, IIO_TEMP, 12, BIT(IIO_CHAN_INFO_OFFSET)),
};
static int mt6370_get_vendor_info(struct mt6370_adc_data *priv)
{
unsigned int dev_info;
int ret;
ret = regmap_read(priv->regmap, MT6370_REG_DEV_INFO, &dev_info);
if (ret)
return ret;
priv->vid = FIELD_GET(MT6370_VENID_MASK, dev_info);
return 0;
}
static int mt6370_adc_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@ -272,6 +317,10 @@ static int mt6370_adc_probe(struct platform_device *pdev)
priv->regmap = regmap;
mutex_init(&priv->adc_lock);
ret = mt6370_get_vendor_info(priv);
if (ret)
return dev_err_probe(dev, ret, "Failed to get vid\n");
ret = regmap_write(priv->regmap, MT6370_REG_CHG_ADC, 0);
if (ret)
return dev_err_probe(dev, ret, "Failed to reset ADC\n");