778 lines
19 KiB
C
778 lines
19 KiB
C
|
// SPDX-License-Identifier: GPL-2.0-only
|
||
|
|
/* ADC driver for AXP20X and AXP22X PMICs
|
||
|
|
*
|
||
|
|
* Copyright (c) 2016 Free Electrons NextThing Co.
|
||
|
|
* Quentin Schulz <quentin.schulz@free-electrons.com>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/completion.h>
|
||
|
|
#include <linux/interrupt.h>
|
||
|
|
#include <linux/io.h>
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/mod_devicetable.h>
|
||
|
|
#include <linux/platform_device.h>
|
||
|
|
#include <linux/pm_runtime.h>
|
||
|
|
#include <linux/property.h>
|
||
|
|
#include <linux/regmap.h>
|
||
|
|
#include <linux/thermal.h>
|
||
|
|
|
||
|
|
#include <linux/iio/iio.h>
|
||
|
|
#include <linux/iio/driver.h>
|
||
|
|
#include <linux/iio/machine.h>
|
||
|
|
#include <linux/mfd/axp20x.h>
|
||
|
|
|
||
|
|
#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 AXP20X_GPIO10_IN_RANGE_GPIO0 BIT(0)
|
||
|
|
#define AXP20X_GPIO10_IN_RANGE_GPIO1 BIT(1)
|
||
|
|
#define AXP20X_GPIO10_IN_RANGE_GPIO0_VAL(x) ((x) & BIT(0))
|
||
|
|
#define AXP20X_GPIO10_IN_RANGE_GPIO1_VAL(x) (((x) & BIT(0)) << 1)
|
||
|
|
|
||
|
|
#define AXP20X_ADC_RATE_MASK GENMASK(7, 6)
|
||
|
|
#define AXP813_V_I_ADC_RATE_MASK GENMASK(5, 4)
|
||
|
|
#define AXP813_ADC_RATE_MASK (AXP20X_ADC_RATE_MASK | AXP813_V_I_ADC_RATE_MASK)
|
||
|
|
#define AXP20X_ADC_RATE_HZ(x) ((ilog2((x) / 25) << 6) & AXP20X_ADC_RATE_MASK)
|
||
|
|
#define AXP22X_ADC_RATE_HZ(x) ((ilog2((x) / 100) << 6) & AXP20X_ADC_RATE_MASK)
|
||
|
|
#define AXP813_TS_GPIO0_ADC_RATE_HZ(x) AXP20X_ADC_RATE_HZ(x)
|
||
|
|
#define AXP813_V_I_ADC_RATE_HZ(x) ((ilog2((x) / 100) << 4) & AXP813_V_I_ADC_RATE_MASK)
|
||
|
|
#define AXP813_ADC_RATE_HZ(x) (AXP20X_ADC_RATE_HZ(x) | AXP813_V_I_ADC_RATE_HZ(x))
|
||
|
|
|
||
|
|
#define AXP20X_ADC_CHANNEL(_channel, _name, _type, _reg) \
|
||
|
|
{ \
|
||
|
|
.type = _type, \
|
||
|
|
.indexed = 1, \
|
||
|
|
.channel = _channel, \
|
||
|
|
.address = _reg, \
|
||
|
|
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
|
||
|
|
BIT(IIO_CHAN_INFO_SCALE), \
|
||
|
|
.datasheet_name = _name, \
|
||
|
|
}
|
||
|
|
|
||
|
|
#define AXP20X_ADC_CHANNEL_OFFSET(_channel, _name, _type, _reg) \
|
||
|
|
{ \
|
||
|
|
.type = _type, \
|
||
|
|
.indexed = 1, \
|
||
|
|
.channel = _channel, \
|
||
|
|
.address = _reg, \
|
||
|
|
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
|
||
|
|
BIT(IIO_CHAN_INFO_SCALE) |\
|
||
|
|
BIT(IIO_CHAN_INFO_OFFSET),\
|
||
|
|
.datasheet_name = _name, \
|
||
|
|
}
|
||
|
|
|
||
|
|
struct axp_data;
|
||
|
|
|
||
|
|
struct axp20x_adc_iio {
|
||
|
|
struct regmap *regmap;
|
||
|
|
const struct axp_data *data;
|
||
|
|
};
|
||
|
|
|
||
|
|
enum axp20x_adc_channel_v {
|
||
|
|
AXP20X_ACIN_V = 0,
|
||
|
|
AXP20X_VBUS_V,
|
||
|
|
AXP20X_TS_IN,
|
||
|
|
AXP20X_GPIO0_V,
|
||
|
|
AXP20X_GPIO1_V,
|
||
|
|
AXP20X_IPSOUT_V,
|
||
|
|
AXP20X_BATT_V,
|
||
|
|
};
|
||
|
|
|
||
|
|
enum axp20x_adc_channel_i {
|
||
|
|
AXP20X_ACIN_I = 0,
|
||
|
|
AXP20X_VBUS_I,
|
||
|
|
AXP20X_BATT_CHRG_I,
|
||
|
|
AXP20X_BATT_DISCHRG_I,
|
||
|
|
};
|
||
|
|
|
||
|
|
enum axp22x_adc_channel_v {
|
||
|
|
AXP22X_TS_IN = 0,
|
||
|
|
AXP22X_BATT_V,
|
||
|
|
};
|
||
|
|
|
||
|
|
enum axp22x_adc_channel_i {
|
||
|
|
AXP22X_BATT_CHRG_I = 1,
|
||
|
|
AXP22X_BATT_DISCHRG_I,
|
||
|
|
};
|
||
|
|
|
||
|
|
enum axp813_adc_channel_v {
|
||
|
|
AXP813_TS_IN = 0,
|
||
|
|
AXP813_GPIO0_V,
|
||
|
|
AXP813_BATT_V,
|
||
|
|
};
|
||
|
|
|
||
|
|
static struct iio_map axp20x_maps[] = {
|
||
|
|
{
|
||
|
|
.consumer_dev_name = "axp20x-usb-power-supply",
|
||
|
|
.consumer_channel = "vbus_v",
|
||
|
|
.adc_channel_label = "vbus_v",
|
||
|
|
}, {
|
||
|
|
.consumer_dev_name = "axp20x-usb-power-supply",
|
||
|
|
.consumer_channel = "vbus_i",
|
||
|
|
.adc_channel_label = "vbus_i",
|
||
|
|
}, {
|
||
|
|
.consumer_dev_name = "axp20x-ac-power-supply",
|
||
|
|
.consumer_channel = "acin_v",
|
||
|
|
.adc_channel_label = "acin_v",
|
||
|
|
}, {
|
||
|
|
.consumer_dev_name = "axp20x-ac-power-supply",
|
||
|
|
.consumer_channel = "acin_i",
|
||
|
|
.adc_channel_label = "acin_i",
|
||
|
|
}, {
|
||
|
|
.consumer_dev_name = "axp20x-battery-power-supply",
|
||
|
|
.consumer_channel = "batt_v",
|
||
|
|
.adc_channel_label = "batt_v",
|
||
|
|
}, {
|
||
|
|
.consumer_dev_name = "axp20x-battery-power-supply",
|
||
|
|
.consumer_channel = "batt_chrg_i",
|
||
|
|
.adc_channel_label = "batt_chrg_i",
|
||
|
|
}, {
|
||
|
|
.consumer_dev_name = "axp20x-battery-power-supply",
|
||
|
|
.consumer_channel = "batt_dischrg_i",
|
||
|
|
.adc_channel_label = "batt_dischrg_i",
|
||
|
|
}, { /* sentinel */ }
|
||
|
|
};
|
||
|
|
|
||
|
|
static struct iio_map axp22x_maps[] = {
|
||
|
|
{
|
||
|
|
.consumer_dev_name = "axp20x-battery-power-supply",
|
||
|
|
.consumer_channel = "batt_v",
|
||
|
|
.adc_channel_label = "batt_v",
|
||
|
|
}, {
|
||
|
|
.consumer_dev_name = "axp20x-battery-power-supply",
|
||
|
|
.consumer_channel = "batt_chrg_i",
|
||
|
|
.adc_channel_label = "batt_chrg_i",
|
||
|
|
}, {
|
||
|
|
.consumer_dev_name = "axp20x-battery-power-supply",
|
||
|
|
.consumer_channel = "batt_dischrg_i",
|
||
|
|
.adc_channel_label = "batt_dischrg_i",
|
||
|
|
}, { /* sentinel */ }
|
||
|
|
};
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Channels are mapped by physical system. Their channels share the same index.
|
||
|
|
* i.e. acin_i is in_current0_raw and acin_v is in_voltage0_raw.
|
||
|
|
* 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 axp20x_adc_channels[] = {
|
||
|
|
AXP20X_ADC_CHANNEL(AXP20X_ACIN_V, "acin_v", IIO_VOLTAGE,
|
||
|
|
AXP20X_ACIN_V_ADC_H),
|
||
|
|
AXP20X_ADC_CHANNEL(AXP20X_ACIN_I, "acin_i", IIO_CURRENT,
|
||
|
|
AXP20X_ACIN_I_ADC_H),
|
||
|
|
AXP20X_ADC_CHANNEL(AXP20X_VBUS_V, "vbus_v", IIO_VOLTAGE,
|
||
|
|
AXP20X_VBUS_V_ADC_H),
|
||
|
|
AXP20X_ADC_CHANNEL(AXP20X_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(AXP20X_GPIO0_V, "gpio0_v", IIO_VOLTAGE,
|
||
|
|
AXP20X_GPIO0_V_ADC_H),
|
||
|
|
AXP20X_ADC_CHANNEL_OFFSET(AXP20X_GPIO1_V, "gpio1_v", IIO_VOLTAGE,
|
||
|
|
AXP20X_GPIO1_V_ADC_H),
|
||
|
|
AXP20X_ADC_CHANNEL(AXP20X_IPSOUT_V, "ipsout_v", IIO_VOLTAGE,
|
||
|
|
AXP20X_IPSOUT_V_HIGH_H),
|
||
|
|
AXP20X_ADC_CHANNEL(AXP20X_BATT_V, "batt_v", IIO_VOLTAGE,
|
||
|
|
AXP20X_BATT_V_H),
|
||
|
|
AXP20X_ADC_CHANNEL(AXP20X_BATT_CHRG_I, "batt_chrg_i", IIO_CURRENT,
|
||
|
|
AXP20X_BATT_CHRG_I_H),
|
||
|
|
AXP20X_ADC_CHANNEL(AXP20X_BATT_DISCHRG_I, "batt_dischrg_i", IIO_CURRENT,
|
||
|
|
AXP20X_BATT_DISCHRG_I_H),
|
||
|
|
AXP20X_ADC_CHANNEL(AXP20X_TS_IN, "ts_v", IIO_VOLTAGE,
|
||
|
|
AXP20X_TS_IN_H),
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct iio_chan_spec axp22x_adc_channels[] = {
|
||
|
|
{
|
||
|
|
.type = IIO_TEMP,
|
||
|
|
.address = AXP22X_PMIC_TEMP_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(AXP22X_BATT_V, "batt_v", IIO_VOLTAGE,
|
||
|
|
AXP20X_BATT_V_H),
|
||
|
|
AXP20X_ADC_CHANNEL(AXP22X_BATT_CHRG_I, "batt_chrg_i", IIO_CURRENT,
|
||
|
|
AXP20X_BATT_CHRG_I_H),
|
||
|
|
AXP20X_ADC_CHANNEL(AXP22X_BATT_DISCHRG_I, "batt_dischrg_i", IIO_CURRENT,
|
||
|
|
AXP20X_BATT_DISCHRG_I_H),
|
||
|
|
AXP20X_ADC_CHANNEL(AXP22X_TS_IN, "ts_v", IIO_VOLTAGE,
|
||
|
|
AXP22X_TS_ADC_H),
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct iio_chan_spec axp813_adc_channels[] = {
|
||
|
|
{
|
||
|
|
.type = IIO_TEMP,
|
||
|
|
.address = AXP22X_PMIC_TEMP_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(AXP813_GPIO0_V, "gpio0_v", IIO_VOLTAGE,
|
||
|
|
AXP288_GP_ADC_H),
|
||
|
|
AXP20X_ADC_CHANNEL(AXP813_BATT_V, "batt_v", IIO_VOLTAGE,
|
||
|
|
AXP20X_BATT_V_H),
|
||
|
|
AXP20X_ADC_CHANNEL(AXP22X_BATT_CHRG_I, "batt_chrg_i", IIO_CURRENT,
|
||
|
|
AXP20X_BATT_CHRG_I_H),
|
||
|
|
AXP20X_ADC_CHANNEL(AXP22X_BATT_DISCHRG_I, "batt_dischrg_i", IIO_CURRENT,
|
||
|
|
AXP20X_BATT_DISCHRG_I_H),
|
||
|
|
AXP20X_ADC_CHANNEL(AXP813_TS_IN, "ts_v", IIO_VOLTAGE,
|
||
|
|
AXP288_TS_ADC_H),
|
||
|
|
};
|
||
|
|
|
||
|
|
static int axp20x_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 size = 12;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* N.B.: Unlike the Chinese datasheets tell, the charging current is
|
||
|
|
* stored on 12 bits, not 13 bits. Only discharging current is on 13
|
||
|
|
* bits.
|
||
|
|
*/
|
||
|
|
if (chan->type == IIO_CURRENT && chan->channel == AXP20X_BATT_DISCHRG_I)
|
||
|
|
size = 13;
|
||
|
|
else
|
||
|
|
size = 12;
|
||
|
|
|
||
|
|
*val = axp20x_read_variable_width(info->regmap, chan->address, size);
|
||
|
|
if (*val < 0)
|
||
|
|
return *val;
|
||
|
|
|
||
|
|
return IIO_VAL_INT;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int axp22x_adc_raw(struct iio_dev *indio_dev,
|
||
|
|
struct iio_chan_spec const *chan, int *val)
|
||
|
|
{
|
||
|
|
struct axp20x_adc_iio *info = iio_priv(indio_dev);
|
||
|
|
|
||
|
|
*val = axp20x_read_variable_width(info->regmap, chan->address, 12);
|
||
|
|
if (*val < 0)
|
||
|
|
return *val;
|
||
|
|
|
||
|
|
return IIO_VAL_INT;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int axp813_adc_raw(struct iio_dev *indio_dev,
|
||
|
|
struct iio_chan_spec const *chan, int *val)
|
||
|
|
{
|
||
|
|
struct axp20x_adc_iio *info = iio_priv(indio_dev);
|
||
|
|
|
||
|
|
*val = axp20x_read_variable_width(info->regmap, chan->address, 12);
|
||
|
|
if (*val < 0)
|
||
|
|
return *val;
|
||
|
|
|
||
|
|
return IIO_VAL_INT;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int axp20x_adc_scale_voltage(int channel, int *val, int *val2)
|
||
|
|
{
|
||
|
|
switch (channel) {
|
||
|
|
case AXP20X_ACIN_V:
|
||
|
|
case AXP20X_VBUS_V:
|
||
|
|
*val = 1;
|
||
|
|
*val2 = 700000;
|
||
|
|
return IIO_VAL_INT_PLUS_MICRO;
|
||
|
|
|
||
|
|
case AXP20X_GPIO0_V:
|
||
|
|
case AXP20X_GPIO1_V:
|
||
|
|
*val = 0;
|
||
|
|
*val2 = 500000;
|
||
|
|
return IIO_VAL_INT_PLUS_MICRO;
|
||
|
|
|
||
|
|
case AXP20X_BATT_V:
|
||
|
|
*val = 1;
|
||
|
|
*val2 = 100000;
|
||
|
|
return IIO_VAL_INT_PLUS_MICRO;
|
||
|
|
|
||
|
|
case AXP20X_IPSOUT_V:
|
||
|
|
*val = 1;
|
||
|
|
*val2 = 400000;
|
||
|
|
return IIO_VAL_INT_PLUS_MICRO;
|
||
|
|
|
||
|
|
case AXP20X_TS_IN:
|
||
|
|
/* 0.8 mV per LSB */
|
||
|
|
*val = 0;
|
||
|
|
*val2 = 800000;
|
||
|
|
return IIO_VAL_INT_PLUS_MICRO;
|
||
|
|
|
||
|
|
default:
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static int axp22x_adc_scale_voltage(int channel, int *val, int *val2)
|
||
|
|
{
|
||
|
|
switch (channel) {
|
||
|
|
case AXP22X_BATT_V:
|
||
|
|
/* 1.1 mV per LSB */
|
||
|
|
*val = 1;
|
||
|
|
*val2 = 100000;
|
||
|
|
return IIO_VAL_INT_PLUS_MICRO;
|
||
|
|
|
||
|
|
case AXP22X_TS_IN:
|
||
|
|
/* 0.8 mV per LSB */
|
||
|
|
*val = 0;
|
||
|
|
*val2 = 800000;
|
||
|
|
return IIO_VAL_INT_PLUS_MICRO;
|
||
|
|
|
||
|
|
default:
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
static int axp813_adc_scale_voltage(int channel, int *val, int *val2)
|
||
|
|
{
|
||
|
|
switch (channel) {
|
||
|
|
case AXP813_GPIO0_V:
|
||
|
|
*val = 0;
|
||
|
|
*val2 = 800000;
|
||
|
|
return IIO_VAL_INT_PLUS_MICRO;
|
||
|
|
|
||
|
|
case AXP813_BATT_V:
|
||
|
|
*val = 1;
|
||
|
|
*val2 = 100000;
|
||
|
|
return IIO_VAL_INT_PLUS_MICRO;
|
||
|
|
|
||
|
|
case AXP813_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_current(int channel, int *val, int *val2)
|
||
|
|
{
|
||
|
|
switch (channel) {
|
||
|
|
case AXP20X_ACIN_I:
|
||
|
|
*val = 0;
|
||
|
|
*val2 = 625000;
|
||
|
|
return IIO_VAL_INT_PLUS_MICRO;
|
||
|
|
|
||
|
|
case AXP20X_VBUS_I:
|
||
|
|
*val = 0;
|
||
|
|
*val2 = 375000;
|
||
|
|
return IIO_VAL_INT_PLUS_MICRO;
|
||
|
|
|
||
|
|
case AXP20X_BATT_DISCHRG_I:
|
||
|
|
case AXP20X_BATT_CHRG_I:
|
||
|
|
*val = 0;
|
||
|
|
*val2 = 500000;
|
||
|
|
return IIO_VAL_INT_PLUS_MICRO;
|
||
|
|
|
||
|
|
default:
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static int axp20x_adc_scale(struct iio_chan_spec const *chan, int *val,
|
||
|
|
int *val2)
|
||
|
|
{
|
||
|
|
switch (chan->type) {
|
||
|
|
case IIO_VOLTAGE:
|
||
|
|
return axp20x_adc_scale_voltage(chan->channel, val, val2);
|
||
|
|
|
||
|
|
case IIO_CURRENT:
|
||
|
|
return axp20x_adc_scale_current(chan->channel, val, val2);
|
||
|
|
|
||
|
|
case IIO_TEMP:
|
||
|
|
*val = 100;
|
||
|
|
return IIO_VAL_INT;
|
||
|
|
|
||
|
|
default:
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static int axp22x_adc_scale(struct iio_chan_spec const *chan, int *val,
|
||
|
|
int *val2)
|
||
|
|
{
|
||
|
|
switch (chan->type) {
|
||
|
|
case IIO_VOLTAGE:
|
||
|
|
return axp22x_adc_scale_voltage(chan->channel, val, val2);
|
||
|
|
|
||
|
|
case IIO_CURRENT:
|
||
|
|
*val = 1;
|
||
|
|
return IIO_VAL_INT;
|
||
|
|
|
||
|
|
case IIO_TEMP:
|
||
|
|
*val = 100;
|
||
|
|
return IIO_VAL_INT;
|
||
|
|
|
||
|
|
default:
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static int axp813_adc_scale(struct iio_chan_spec const *chan, int *val,
|
||
|
|
int *val2)
|
||
|
|
{
|
||
|
|
switch (chan->type) {
|
||
|
|
case IIO_VOLTAGE:
|
||
|
|
return axp813_adc_scale_voltage(chan->channel, val, val2);
|
||
|
|
|
||
|
|
case IIO_CURRENT:
|
||
|
|
*val = 1;
|
||
|
|
return IIO_VAL_INT;
|
||
|
|
|
||
|
|
case IIO_TEMP:
|
||
|
|
*val = 100;
|
||
|
|
return IIO_VAL_INT;
|
||
|
|
|
||
|
|
default:
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static int axp20x_adc_offset_voltage(struct iio_dev *indio_dev, int channel,
|
||
|
|
int *val)
|
||
|
|
{
|
||
|
|
struct axp20x_adc_iio *info = iio_priv(indio_dev);
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
ret = regmap_read(info->regmap, AXP20X_GPIO10_IN_RANGE, val);
|
||
|
|
if (ret < 0)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
switch (channel) {
|
||
|
|
case AXP20X_GPIO0_V:
|
||
|
|
*val &= AXP20X_GPIO10_IN_RANGE_GPIO0;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case AXP20X_GPIO1_V:
|
||
|
|
*val &= AXP20X_GPIO10_IN_RANGE_GPIO1;
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
*val = *val ? 700000 : 0;
|
||
|
|
|
||
|
|
return IIO_VAL_INT;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int axp20x_adc_offset(struct iio_dev *indio_dev,
|
||
|
|
struct iio_chan_spec const *chan, int *val)
|
||
|
|
{
|
||
|
|
switch (chan->type) {
|
||
|
|
case IIO_VOLTAGE:
|
||
|
|
return axp20x_adc_offset_voltage(indio_dev, chan->channel, val);
|
||
|
|
|
||
|
|
case IIO_TEMP:
|
||
|
|
*val = -1447;
|
||
|
|
return IIO_VAL_INT;
|
||
|
|
|
||
|
|
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)
|
||
|
|
{
|
||
|
|
switch (mask) {
|
||
|
|
case IIO_CHAN_INFO_OFFSET:
|
||
|
|
return axp20x_adc_offset(indio_dev, chan, val);
|
||
|
|
|
||
|
|
case IIO_CHAN_INFO_SCALE:
|
||
|
|
return axp20x_adc_scale(chan, val, val2);
|
||
|
|
|
||
|
|
case IIO_CHAN_INFO_RAW:
|
||
|
|
return axp20x_adc_raw(indio_dev, chan, val);
|
||
|
|
|
||
|
|
default:
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static int axp22x_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:
|
||
|
|
/* For PMIC temp only */
|
||
|
|
*val = -2677;
|
||
|
|
return IIO_VAL_INT;
|
||
|
|
|
||
|
|
case IIO_CHAN_INFO_SCALE:
|
||
|
|
return axp22x_adc_scale(chan, val, val2);
|
||
|
|
|
||
|
|
case IIO_CHAN_INFO_RAW:
|
||
|
|
return axp22x_adc_raw(indio_dev, chan, val);
|
||
|
|
|
||
|
|
default:
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static int axp813_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:
|
||
|
|
*val = -2667;
|
||
|
|
return IIO_VAL_INT;
|
||
|
|
|
||
|
|
case IIO_CHAN_INFO_SCALE:
|
||
|
|
return axp813_adc_scale(chan, val, val2);
|
||
|
|
|
||
|
|
case IIO_CHAN_INFO_RAW:
|
||
|
|
return axp813_adc_raw(indio_dev, chan, val);
|
||
|
|
|
||
|
|
default:
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static int axp20x_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 reg, regval;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The AXP20X PMIC allows the user to choose between 0V and 0.7V offsets
|
||
|
|
* for (independently) GPIO0 and GPIO1 when in ADC mode.
|
||
|
|
*/
|
||
|
|
if (mask != IIO_CHAN_INFO_OFFSET)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
if (val != 0 && val != 700000)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
val = val ? 1 : 0;
|
||
|
|
|
||
|
|
switch (chan->channel) {
|
||
|
|
case AXP20X_GPIO0_V:
|
||
|
|
reg = AXP20X_GPIO10_IN_RANGE_GPIO0;
|
||
|
|
regval = AXP20X_GPIO10_IN_RANGE_GPIO0_VAL(val);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case AXP20X_GPIO1_V:
|
||
|
|
reg = AXP20X_GPIO10_IN_RANGE_GPIO1;
|
||
|
|
regval = AXP20X_GPIO10_IN_RANGE_GPIO1_VAL(val);
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
return regmap_update_bits(info->regmap, AXP20X_GPIO10_IN_RANGE, reg,
|
||
|
|
regval);
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct iio_info axp20x_adc_iio_info = {
|
||
|
|
.read_raw = axp20x_read_raw,
|
||
|
|
.write_raw = axp20x_write_raw,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct iio_info axp22x_adc_iio_info = {
|
||
|
|
.read_raw = axp22x_read_raw,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct iio_info axp813_adc_iio_info = {
|
||
|
|
.read_raw = axp813_read_raw,
|
||
|
|
};
|
||
|
|
|
||
|
|
static int axp20x_adc_rate(struct axp20x_adc_iio *info, int rate)
|
||
|
|
{
|
||
|
|
return regmap_update_bits(info->regmap, AXP20X_ADC_RATE,
|
||
|
|
AXP20X_ADC_RATE_MASK,
|
||
|
|
AXP20X_ADC_RATE_HZ(rate));
|
||
|
|
}
|
||
|
|
|
||
|
|
static int axp22x_adc_rate(struct axp20x_adc_iio *info, int rate)
|
||
|
|
{
|
||
|
|
return regmap_update_bits(info->regmap, AXP20X_ADC_RATE,
|
||
|
|
AXP20X_ADC_RATE_MASK,
|
||
|
|
AXP22X_ADC_RATE_HZ(rate));
|
||
|
|
}
|
||
|
|
|
||
|
|
static int axp813_adc_rate(struct axp20x_adc_iio *info, int rate)
|
||
|
|
{
|
||
|
|
return regmap_update_bits(info->regmap, AXP813_ADC_RATE,
|
||
|
|
AXP813_ADC_RATE_MASK,
|
||
|
|
AXP813_ADC_RATE_HZ(rate));
|
||
|
|
}
|
||
|
|
|
||
|
|
struct axp_data {
|
||
|
|
const struct iio_info *iio_info;
|
||
|
|
int num_channels;
|
||
|
|
struct iio_chan_spec const *channels;
|
||
|
|
unsigned long adc_en1_mask;
|
||
|
|
int (*adc_rate)(struct axp20x_adc_iio *info,
|
||
|
|
int rate);
|
||
|
|
bool adc_en2;
|
||
|
|
struct iio_map *maps;
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct axp_data axp20x_data = {
|
||
|
|
.iio_info = &axp20x_adc_iio_info,
|
||
|
|
.num_channels = ARRAY_SIZE(axp20x_adc_channels),
|
||
|
|
.channels = axp20x_adc_channels,
|
||
|
|
.adc_en1_mask = AXP20X_ADC_EN1_MASK,
|
||
|
|
.adc_rate = axp20x_adc_rate,
|
||
|
|
.adc_en2 = true,
|
||
|
|
.maps = axp20x_maps,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct axp_data axp22x_data = {
|
||
|
|
.iio_info = &axp22x_adc_iio_info,
|
||
|
|
.num_channels = ARRAY_SIZE(axp22x_adc_channels),
|
||
|
|
.channels = axp22x_adc_channels,
|
||
|
|
.adc_en1_mask = AXP22X_ADC_EN1_MASK,
|
||
|
|
.adc_rate = axp22x_adc_rate,
|
||
|
|
.adc_en2 = false,
|
||
|
|
.maps = axp22x_maps,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct axp_data axp813_data = {
|
||
|
|
.iio_info = &axp813_adc_iio_info,
|
||
|
|
.num_channels = ARRAY_SIZE(axp813_adc_channels),
|
||
|
|
.channels = axp813_adc_channels,
|
||
|
|
.adc_en1_mask = AXP22X_ADC_EN1_MASK,
|
||
|
|
.adc_rate = axp813_adc_rate,
|
||
|
|
.adc_en2 = false,
|
||
|
|
.maps = axp22x_maps,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct of_device_id axp20x_adc_of_match[] = {
|
||
|
|
{ .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, },
|
||
|
|
{ /* sentinel */ }
|
||
|
|
};
|
||
|
|
MODULE_DEVICE_TABLE(of, axp20x_adc_of_match);
|
||
|
|
|
||
|
|
static const struct platform_device_id axp20x_adc_id_match[] = {
|
||
|
|
{ .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, },
|
||
|
|
{ /* sentinel */ },
|
||
|
|
};
|
||
|
|
MODULE_DEVICE_TABLE(platform, axp20x_adc_id_match);
|
||
|
|
|
||
|
|
static int axp20x_probe(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
struct axp20x_adc_iio *info;
|
||
|
|
struct iio_dev *indio_dev;
|
||
|
|
struct axp20x_dev *axp20x_dev;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
axp20x_dev = dev_get_drvdata(pdev->dev.parent);
|
||
|
|
|
||
|
|
indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*info));
|
||
|
|
if (!indio_dev)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
info = iio_priv(indio_dev);
|
||
|
|
platform_set_drvdata(pdev, indio_dev);
|
||
|
|
|
||
|
|
info->regmap = axp20x_dev->regmap;
|
||
|
|
indio_dev->modes = INDIO_DIRECT_MODE;
|
||
|
|
|
||
|
|
if (!dev_fwnode(&pdev->dev)) {
|
||
|
|
const struct platform_device_id *id;
|
||
|
|
|
||
|
|
id = platform_get_device_id(pdev);
|
||
|
|
info->data = (const struct axp_data *)id->driver_data;
|
||
|
|
} else {
|
||
|
|
struct device *dev = &pdev->dev;
|
||
|
|
|
||
|
|
info->data = device_get_match_data(dev);
|
||
|
|
}
|
||
|
|
|
||
|
|
indio_dev->name = platform_get_device_id(pdev)->name;
|
||
|
|
indio_dev->info = info->data->iio_info;
|
||
|
|
indio_dev->num_channels = info->data->num_channels;
|
||
|
|
indio_dev->channels = info->data->channels;
|
||
|
|
|
||
|
|
/* Enable the ADCs on IP */
|
||
|
|
regmap_write(info->regmap, AXP20X_ADC_EN1, info->data->adc_en1_mask);
|
||
|
|
|
||
|
|
if (info->data->adc_en2)
|
||
|
|
/* Enable GPIO0/1 and internal temperature ADCs */
|
||
|
|
regmap_update_bits(info->regmap, AXP20X_ADC_EN2,
|
||
|
|
AXP20X_ADC_EN2_MASK, AXP20X_ADC_EN2_MASK);
|
||
|
|
|
||
|
|
/* Configure ADCs rate */
|
||
|
|
info->data->adc_rate(info, 100);
|
||
|
|
|
||
|
|
ret = iio_map_array_register(indio_dev, info->data->maps);
|
||
|
|
if (ret < 0) {
|
||
|
|
dev_err(&pdev->dev, "failed to register IIO maps: %d\n", ret);
|
||
|
|
goto fail_map;
|
||
|
|
}
|
||
|
|
|
||
|
|
ret = iio_device_register(indio_dev);
|
||
|
|
if (ret < 0) {
|
||
|
|
dev_err(&pdev->dev, "could not register the device\n");
|
||
|
|
goto fail_register;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
fail_register:
|
||
|
|
iio_map_array_unregister(indio_dev);
|
||
|
|
|
||
|
|
fail_map:
|
||
|
|
regmap_write(info->regmap, AXP20X_ADC_EN1, 0);
|
||
|
|
|
||
|
|
if (info->data->adc_en2)
|
||
|
|
regmap_write(info->regmap, AXP20X_ADC_EN2, 0);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int axp20x_remove(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
struct iio_dev *indio_dev = platform_get_drvdata(pdev);
|
||
|
|
struct axp20x_adc_iio *info = iio_priv(indio_dev);
|
||
|
|
|
||
|
|
iio_device_unregister(indio_dev);
|
||
|
|
iio_map_array_unregister(indio_dev);
|
||
|
|
|
||
|
|
regmap_write(info->regmap, AXP20X_ADC_EN1, 0);
|
||
|
|
|
||
|
|
if (info->data->adc_en2)
|
||
|
|
regmap_write(info->regmap, AXP20X_ADC_EN2, 0);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct platform_driver axp20x_adc_driver = {
|
||
|
|
.driver = {
|
||
|
|
.name = "axp20x-adc",
|
||
|
|
.of_match_table = axp20x_adc_of_match,
|
||
|
|
},
|
||
|
|
.id_table = axp20x_adc_id_match,
|
||
|
|
.probe = axp20x_probe,
|
||
|
|
.remove = axp20x_remove,
|
||
|
|
};
|
||
|
|
|
||
|
|
module_platform_driver(axp20x_adc_driver);
|
||
|
|
|
||
|
|
MODULE_DESCRIPTION("ADC driver for AXP20X and AXP22X PMICs");
|
||
|
|
MODULE_AUTHOR("Quentin Schulz <quentin.schulz@free-electrons.com>");
|
||
|
|
MODULE_LICENSE("GPL");
|