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iio: adc: axp20x_adc: Add support for AXP192

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The AXP192 is identical to the AXP20x, except for the addition of
two more GPIO ADC channels.

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Aidan MacDonald <aidanmacdonald.0x0@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Aidan MacDonald 2022-10-17 00:43:31 +01:00 • committed by Jonathan Cameron
parent 038c57c179
commit f451fbd73b
1 changed files with 279 additions and 0 deletions
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279
drivers/iio/adc/axp20x_adc.c
View file

@ -22,11 +22,19 @@
#include <linux/iio/machine.h>
#include <linux/mfd/axp20x.h>
#define AXP192_ADC_EN1_MASK GENMASK(7, 0)
#define AXP192_ADC_EN2_MASK (GENMASK(3, 0) | BIT(7))
#define AXP20X_ADC_EN1_MASK GENMASK(7, 0)
#define AXP20X_ADC_EN2_MASK (GENMASK(3, 2) | BIT(7))
#define AXP22X_ADC_EN1_MASK (GENMASK(7, 5) | BIT(0))
#define AXP192_GPIO30_IN_RANGE_GPIO0 BIT(0)
#define AXP192_GPIO30_IN_RANGE_GPIO1 BIT(1)
#define AXP192_GPIO30_IN_RANGE_GPIO2 BIT(2)
#define AXP192_GPIO30_IN_RANGE_GPIO3 BIT(3)
#define AXP20X_GPIO10_IN_RANGE_GPIO0 BIT(0)
#define AXP20X_GPIO10_IN_RANGE_GPIO1 BIT(1)
@ -71,6 +79,25 @@ struct axp20x_adc_iio {
const struct axp_data *data;
};
enum axp192_adc_channel_v {
AXP192_ACIN_V = 0,
AXP192_VBUS_V,
AXP192_TS_IN,
AXP192_GPIO0_V,
AXP192_GPIO1_V,
AXP192_GPIO2_V,
AXP192_GPIO3_V,
AXP192_IPSOUT_V,
AXP192_BATT_V,
};
enum axp192_adc_channel_i {
AXP192_ACIN_I = 0,
AXP192_VBUS_I,
AXP192_BATT_CHRG_I,
AXP192_BATT_DISCHRG_I,
};
enum axp20x_adc_channel_v {
AXP20X_ACIN_V = 0,
AXP20X_VBUS_V,
@ -158,6 +185,43 @@ static struct iio_map axp22x_maps[] = {
* The only exception is for the battery. batt_v will be in_voltage6_raw and
* charge current in_current6_raw and discharge current will be in_current7_raw.
*/
static const struct iio_chan_spec axp192_adc_channels[] = {
AXP20X_ADC_CHANNEL(AXP192_ACIN_V, "acin_v", IIO_VOLTAGE,
AXP20X_ACIN_V_ADC_H),
AXP20X_ADC_CHANNEL(AXP192_ACIN_I, "acin_i", IIO_CURRENT,
AXP20X_ACIN_I_ADC_H),
AXP20X_ADC_CHANNEL(AXP192_VBUS_V, "vbus_v", IIO_VOLTAGE,
AXP20X_VBUS_V_ADC_H),
AXP20X_ADC_CHANNEL(AXP192_VBUS_I, "vbus_i", IIO_CURRENT,
AXP20X_VBUS_I_ADC_H),
{
.type = IIO_TEMP,
.address = AXP20X_TEMP_ADC_H,
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
BIT(IIO_CHAN_INFO_SCALE) |
BIT(IIO_CHAN_INFO_OFFSET),
.datasheet_name = "pmic_temp",
},
AXP20X_ADC_CHANNEL_OFFSET(AXP192_GPIO0_V, "gpio0_v", IIO_VOLTAGE,
AXP20X_GPIO0_V_ADC_H),
AXP20X_ADC_CHANNEL_OFFSET(AXP192_GPIO1_V, "gpio1_v", IIO_VOLTAGE,
AXP20X_GPIO1_V_ADC_H),
AXP20X_ADC_CHANNEL_OFFSET(AXP192_GPIO2_V, "gpio2_v", IIO_VOLTAGE,
AXP192_GPIO2_V_ADC_H),
AXP20X_ADC_CHANNEL_OFFSET(AXP192_GPIO3_V, "gpio3_v", IIO_VOLTAGE,
AXP192_GPIO3_V_ADC_H),
AXP20X_ADC_CHANNEL(AXP192_IPSOUT_V, "ipsout_v", IIO_VOLTAGE,
AXP20X_IPSOUT_V_HIGH_H),
AXP20X_ADC_CHANNEL(AXP192_BATT_V, "batt_v", IIO_VOLTAGE,
AXP20X_BATT_V_H),
AXP20X_ADC_CHANNEL(AXP192_BATT_CHRG_I, "batt_chrg_i", IIO_CURRENT,
AXP20X_BATT_CHRG_I_H),
AXP20X_ADC_CHANNEL(AXP192_BATT_DISCHRG_I, "batt_dischrg_i", IIO_CURRENT,
AXP20X_BATT_DISCHRG_I_H),
AXP20X_ADC_CHANNEL(AXP192_TS_IN, "ts_v", IIO_VOLTAGE,
AXP20X_TS_IN_H),
};
static const struct iio_chan_spec axp20x_adc_channels[] = {
AXP20X_ADC_CHANNEL(AXP20X_ACIN_V, "acin_v", IIO_VOLTAGE,
AXP20X_ACIN_V_ADC_H),
@ -231,6 +295,27 @@ static const struct iio_chan_spec axp813_adc_channels[] = {
AXP288_TS_ADC_H),
};
static int axp192_adc_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan, int *val)
{
struct axp20x_adc_iio *info = iio_priv(indio_dev);
int ret, size;
if (chan->type == IIO_CURRENT &&
(chan->channel == AXP192_BATT_CHRG_I ||
chan->channel == AXP192_BATT_DISCHRG_I))
size = 13;
else
size = 12;
ret = axp20x_read_variable_width(info->regmap, chan->address, size);
if (ret < 0)
return ret;
*val = ret;
return IIO_VAL_INT;
}
static int axp20x_adc_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan, int *val)
{
@ -283,6 +368,44 @@ static int axp813_adc_raw(struct iio_dev *indio_dev,
return IIO_VAL_INT;
}
static int axp192_adc_scale_voltage(int channel, int *val, int *val2)
{
switch (channel) {
case AXP192_ACIN_V:
case AXP192_VBUS_V:
*val = 1;
*val2 = 700000;
return IIO_VAL_INT_PLUS_MICRO;
case AXP192_GPIO0_V:
case AXP192_GPIO1_V:
case AXP192_GPIO2_V:
case AXP192_GPIO3_V:
*val = 0;
*val2 = 500000;
return IIO_VAL_INT_PLUS_MICRO;
case AXP192_BATT_V:
*val = 1;
*val2 = 100000;
return IIO_VAL_INT_PLUS_MICRO;
case AXP192_IPSOUT_V:
*val = 1;
*val2 = 400000;
return IIO_VAL_INT_PLUS_MICRO;
case AXP192_TS_IN:
/* 0.8 mV per LSB */
*val = 0;
*val2 = 800000;
return IIO_VAL_INT_PLUS_MICRO;
default:
return -EINVAL;
}
}
static int axp20x_adc_scale_voltage(int channel, int *val, int *val2)
{
switch (channel) {
@ -386,6 +509,29 @@ static int axp20x_adc_scale_current(int channel, int *val, int *val2)
}
}
static int axp192_adc_scale(struct iio_chan_spec const *chan, int *val,
int *val2)
{
switch (chan->type) {
case IIO_VOLTAGE:
return axp192_adc_scale_voltage(chan->channel, val, val2);
case IIO_CURRENT:
/*
* AXP192 current channels are identical to the AXP20x,
* therefore we can re-use the scaling function.
*/
return axp20x_adc_scale_current(chan->channel, val, val2);
case IIO_TEMP:
*val = 100;
return IIO_VAL_INT;
default:
return -EINVAL;
}
}
static int axp20x_adc_scale(struct iio_chan_spec const *chan, int *val,
int *val2)
{
@ -445,6 +591,42 @@ static int axp813_adc_scale(struct iio_chan_spec const *chan, int *val,
}
}
static int axp192_adc_offset_voltage(struct iio_dev *indio_dev, int channel,
int *val)
{
struct axp20x_adc_iio *info = iio_priv(indio_dev);
unsigned int regval;
int ret;
ret = regmap_read(info->regmap, AXP192_GPIO30_IN_RANGE, &regval);
if (ret < 0)
return ret;
switch (channel) {
case AXP192_GPIO0_V:
regval = FIELD_GET(AXP192_GPIO30_IN_RANGE_GPIO0, regval);
break;
case AXP192_GPIO1_V:
regval = FIELD_GET(AXP192_GPIO30_IN_RANGE_GPIO1, regval);
break;
case AXP192_GPIO2_V:
regval = FIELD_GET(AXP192_GPIO30_IN_RANGE_GPIO2, regval);
break;
case AXP192_GPIO3_V:
regval = FIELD_GET(AXP192_GPIO30_IN_RANGE_GPIO3, regval);
break;
default:
return -EINVAL;
}
*val = regval ? 700000 : 0;
return IIO_VAL_INT;
}
static int axp20x_adc_offset_voltage(struct iio_dev *indio_dev, int channel,
int *val)
{
@ -473,6 +655,22 @@ static int axp20x_adc_offset_voltage(struct iio_dev *indio_dev, int channel,
return IIO_VAL_INT;
}
static int axp192_adc_offset(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan, int *val)
{
switch (chan->type) {
case IIO_VOLTAGE:
return axp192_adc_offset_voltage(indio_dev, chan->channel, val);
case IIO_TEMP:
*val = -1447;
return IIO_VAL_INT;
default:
return -EINVAL;
}
}
static int axp20x_adc_offset(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan, int *val)
{
@ -489,6 +687,25 @@ static int axp20x_adc_offset(struct iio_dev *indio_dev,
}
}
static int axp192_read_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan, int *val,
int *val2, long mask)
{
switch (mask) {
case IIO_CHAN_INFO_OFFSET:
return axp192_adc_offset(indio_dev, chan, val);
case IIO_CHAN_INFO_SCALE:
return axp192_adc_scale(chan, val, val2);
case IIO_CHAN_INFO_RAW:
return axp192_adc_raw(indio_dev, chan, val);
default:
return -EINVAL;
}
}
static int axp20x_read_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan, int *val,
int *val2, long mask)
@ -549,6 +766,51 @@ static int axp813_read_raw(struct iio_dev *indio_dev,
}
}
static int axp192_write_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan, int val, int val2,
long mask)
{
struct axp20x_adc_iio *info = iio_priv(indio_dev);
unsigned int regmask, regval;
/*
* The AXP192 PMIC allows the user to choose between 0V and 0.7V offsets
* for (independently) GPIO0-3 when in ADC mode.
*/
if (mask != IIO_CHAN_INFO_OFFSET)
return -EINVAL;
if (val != 0 && val != 700000)
return -EINVAL;
switch (chan->channel) {
case AXP192_GPIO0_V:
regmask = AXP192_GPIO30_IN_RANGE_GPIO0;
regval = FIELD_PREP(AXP192_GPIO30_IN_RANGE_GPIO0, !!val);
break;
case AXP192_GPIO1_V:
regmask = AXP192_GPIO30_IN_RANGE_GPIO1;
regval = FIELD_PREP(AXP192_GPIO30_IN_RANGE_GPIO1, !!val);
break;
case AXP192_GPIO2_V:
regmask = AXP192_GPIO30_IN_RANGE_GPIO2;
regval = FIELD_PREP(AXP192_GPIO30_IN_RANGE_GPIO2, !!val);
break;
case AXP192_GPIO3_V:
regmask = AXP192_GPIO30_IN_RANGE_GPIO3;
regval = FIELD_PREP(AXP192_GPIO30_IN_RANGE_GPIO3, !!val);
break;
default:
return -EINVAL;
}
return regmap_update_bits(info->regmap, AXP192_GPIO30_IN_RANGE, regmask, regval);
}
static int axp20x_write_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan, int val, int val2,
long mask)
@ -584,6 +846,11 @@ static int axp20x_write_raw(struct iio_dev *indio_dev,
return regmap_update_bits(info->regmap, AXP20X_GPIO10_IN_RANGE, regmask, regval);
}
static const struct iio_info axp192_adc_iio_info = {
.read_raw = axp192_read_raw,
.write_raw = axp192_write_raw,
};
static const struct iio_info axp20x_adc_iio_info = {
.read_raw = axp20x_read_raw,
.write_raw = axp20x_write_raw,
@ -629,6 +896,16 @@ struct axp_data {
struct iio_map *maps;
};
static const struct axp_data axp192_data = {
.iio_info = &axp192_adc_iio_info,
.num_channels = ARRAY_SIZE(axp192_adc_channels),
.channels = axp192_adc_channels,
.adc_en1_mask = AXP192_ADC_EN1_MASK,
.adc_en2_mask = AXP192_ADC_EN2_MASK,
.adc_rate = axp20x_adc_rate,
.maps = axp20x_maps,
};
static const struct axp_data axp20x_data = {
.iio_info = &axp20x_adc_iio_info,
.num_channels = ARRAY_SIZE(axp20x_adc_channels),
@ -658,6 +935,7 @@ static const struct axp_data axp813_data = {
};
static const struct of_device_id axp20x_adc_of_match[] = {
{ .compatible = "x-powers,axp192-adc", .data = (void *)&axp192_data, },
{ .compatible = "x-powers,axp209-adc", .data = (void *)&axp20x_data, },
{ .compatible = "x-powers,axp221-adc", .data = (void *)&axp22x_data, },
{ .compatible = "x-powers,axp813-adc", .data = (void *)&axp813_data, },
@ -666,6 +944,7 @@ static const struct of_device_id axp20x_adc_of_match[] = {
MODULE_DEVICE_TABLE(of, axp20x_adc_of_match);
static const struct platform_device_id axp20x_adc_id_match[] = {
{ .name = "axp192-adc", .driver_data = (kernel_ulong_t)&axp192_data, },
{ .name = "axp20x-adc", .driver_data = (kernel_ulong_t)&axp20x_data, },
{ .name = "axp22x-adc", .driver_data = (kernel_ulong_t)&axp22x_data, },
{ .name = "axp813-adc", .driver_data = (kernel_ulong_t)&axp813_data, },