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Date:   Sat, 7 Jan 2017 14:13:41 -0500
From:   Jonathan Cameron <jic23@...nel.org>
To:     Quentin Schulz <quentin.schulz@...e-electrons.com>,
        knaack.h@....de, lars@...afoo.de, pmeerw@...erw.net,
        robh+dt@...nel.org, mark.rutland@....com, wens@...e.org,
        sre@...nel.org, linux@...linux.org.uk,
        maxime.ripard@...e-electrons.com, lee.jones@...aro.org
Cc:     linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        thomas.petazzoni@...e-electrons.com, icenowy@...c.xyz,
        bonbons@...ux-vserver.org
Subject: Re: [PATCH 03/22] iio: adc: add support for X-Powers AXP20X and
 AXP22X PMICs ADCs

On 02/01/17 11:37, Quentin Schulz wrote:
> The X-Powers AXP20X and AXP22X PMICs have multiple ADCs. They expose the
> battery voltage, battery charge and discharge currents, AC-in and VBUS
> voltages and currents, 2 GPIOs muxable in ADC mode and PMIC temperature.
> 
> This adds support for most of AXP20X and AXP22X ADCs.
> 
> Signed-off-by: Quentin Schulz <quentin.schulz@...e-electrons.com>
Couple of little bits from me. Peter got the bigger stuff.

Jonathan
> ---
>  drivers/iio/adc/Kconfig      |  10 +
>  drivers/iio/adc/Makefile     |   1 +
>  drivers/iio/adc/axp20x_adc.c | 490 +++++++++++++++++++++++++++++++++++++++++++
>  include/linux/mfd/axp20x.h   |   4 +
>  4 files changed, 505 insertions(+)
>  create mode 100644 drivers/iio/adc/axp20x_adc.c
> 
> diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig
> index 38bc319..5c5b51f 100644
> --- a/drivers/iio/adc/Kconfig
> +++ b/drivers/iio/adc/Kconfig
> @@ -154,6 +154,16 @@ config AT91_SAMA5D2_ADC
>  	  To compile this driver as a module, choose M here: the module will be
>  	  called at91-sama5d2_adc.
>  
> +config AXP20X_ADC
> +	tristate "X-Powers AXP20X and AXP22X ADC driver"
> +	depends on MFD_AXP20X
> +	help
> +	  Say yes here to have support for X-Powers power management IC (PMIC)
> +	  AXP20X and AXP22X ADC devices.
> +
> +	  To compile this driver as a module, choose M here: the module will be
> +	  called axp20x_adc.
> +
>  config AXP288_ADC
>  	tristate "X-Powers AXP288 ADC driver"
>  	depends on MFD_AXP20X
> diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile
> index d36c4be..f5c28a5 100644
> --- a/drivers/iio/adc/Makefile
> +++ b/drivers/iio/adc/Makefile
> @@ -16,6 +16,7 @@ obj-$(CONFIG_AD7887) += ad7887.o
>  obj-$(CONFIG_AD799X) += ad799x.o
>  obj-$(CONFIG_AT91_ADC) += at91_adc.o
>  obj-$(CONFIG_AT91_SAMA5D2_ADC) += at91-sama5d2_adc.o
> +obj-$(CONFIG_AXP20X_ADC) += axp20x_adc.o
>  obj-$(CONFIG_AXP288_ADC) += axp288_adc.o
>  obj-$(CONFIG_BCM_IPROC_ADC) += bcm_iproc_adc.o
>  obj-$(CONFIG_BERLIN2_ADC) += berlin2-adc.o
> diff --git a/drivers/iio/adc/axp20x_adc.c b/drivers/iio/adc/axp20x_adc.c
> new file mode 100644
> index 0000000..8df972a
> --- /dev/null
> +++ b/drivers/iio/adc/axp20x_adc.c
> @@ -0,0 +1,490 @@
> +/* ADC driver for AXP20X and AXP22X PMICs
> + *
> + * Copyright (c) 2016 Free Electrons NextThing Co.
> + *	Quentin Schulz <quentin.schulz@...e-electrons.com>
> + *
> + * This program is free software; you can redistribute it and/or modify it under
> + * the terms of the GNU General Public License version 2 as published by the
> + * Free Software Foundation.
> + *
Pet hate : why a blank line here? ;) I'm grumpy - my flight home is delayed.
> + */
> +
> +#include <linux/completion.h>
> +#include <linux/interrupt.h>
> +#include <linux/io.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/of_device.h>
> +#include <linux/platform_device.h>
> +#include <linux/pm_runtime.h>
> +#include <linux/regmap.h>
> +#include <linux/thermal.h>
> +
> +#include <linux/iio/iio.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_ADC_EN2_TEMP_ADC			BIT(7)
> +#define AXP20X_ADC_EN2_GPIO0_ADC		BIT(3)
> +#define AXP20X_ADC_EN2_GPIO1_ADC		BIT(2)
> +
> +#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			(3 << 6)
> +#define AXP20X_ADC_RATE_25HZ			(0 << 6)
> +#define AXP20X_ADC_RATE_50HZ			BIT(6)
> +#define AXP20X_ADC_RATE_100HZ			(2 << 6)
> +#define AXP20X_ADC_RATE_200HZ			(3 << 6)
> +
> +#define AXP22X_ADC_RATE_100HZ			(0 << 6)
> +#define AXP22X_ADC_RATE_200HZ			BIT(6)
> +#define AXP22X_ADC_RATE_400HZ			(2 << 6)
> +#define AXP22X_ADC_RATE_800HZ			(3 << 6)
> +
> +#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 axp20x_adc_iio {
Why?  I'm not seeing this used anywhere.
> +	struct iio_dev		*indio_dev;
> +	struct regmap		*regmap;
> +};
> +
> +enum axp20x_adc_channel {
> +	AXP20X_ACIN_V = 0,
> +	AXP20X_ACIN_I,
> +	AXP20X_VBUS_V,
> +	AXP20X_VBUS_I,
> +	AXP20X_TEMP_ADC,
> +	AXP20X_GPIO0_V,
> +	AXP20X_GPIO1_V,
> +	AXP20X_BATT_V,
> +	AXP20X_BATT_CHRG_I,
> +	AXP20X_BATT_DISCHRG_I,
> +	AXP20X_IPSOUT_V,
> +};
> +
> +enum axp22x_adc_channel {
> +	AXP22X_TEMP_ADC = 0,
> +	AXP22X_BATT_V,
> +	AXP22X_BATT_CHRG_I,
> +	AXP22X_BATT_DISCHRG_I,
> +};
> +
> +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),
> +	AXP20X_ADC_CHANNEL_OFFSET(AXP20X_TEMP_ADC, "temp_adc", IIO_TEMP,
> +				  AXP20X_TEMP_ADC_H),
> +	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_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_IPSOUT_V, "ipsout_v", IIO_VOLTAGE,
> +			   AXP20X_IPSOUT_V_HIGH_H),
> +};
> +
> +static const struct iio_chan_spec axp22x_adc_channels[] = {
> +	AXP20X_ADC_CHANNEL_OFFSET(AXP22X_TEMP_ADC, "temp_adc", IIO_TEMP,
> +				  AXP22X_TEMP_ADC_H),
> +	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),
> +};
> +
> +static int axp20x_adc_read_raw(struct iio_dev *indio_dev,
> +			       struct iio_chan_spec const *channel, int *val,
> +			       int *val2)
> +{
> +	struct axp20x_adc_iio *info = iio_priv(indio_dev);
> +	int size = 12, ret;
> +
> +	switch (channel->channel) {
> +	case AXP20X_BATT_DISCHRG_I:
> +		size = 13;
> +	case AXP20X_ACIN_V:
> +	case AXP20X_ACIN_I:
> +	case AXP20X_VBUS_V:
> +	case AXP20X_VBUS_I:
> +	case AXP20X_TEMP_ADC:
> +	case AXP20X_BATT_V:
> +	case AXP20X_BATT_CHRG_I:
> +	case AXP20X_IPSOUT_V:
> +	case AXP20X_GPIO0_V:
> +	case AXP20X_GPIO1_V:
> +		ret = axp20x_read_variable_width(info->regmap, channel->address,
> +						 size);
> +		if (ret < 0)
> +			return ret;
> +		*val = ret;
> +		return IIO_VAL_INT;
> +
> +	default:
> +		return -EINVAL;
> +	}
> +
> +	return -EINVAL;
> +}
> +
> +static int axp22x_adc_read_raw(struct iio_dev *indio_dev,
> +			       struct iio_chan_spec const *channel, int *val,
> +			       int *val2)
> +{
> +	struct axp20x_adc_iio *info = iio_priv(indio_dev);
> +	int size = 12, ret;
> +
> +	switch (channel->channel) {
> +	case AXP22X_BATT_DISCHRG_I:
> +		size = 13;
> +	case AXP22X_TEMP_ADC:
> +	case AXP22X_BATT_V:
> +	case AXP22X_BATT_CHRG_I:
> +		ret = axp20x_read_variable_width(info->regmap, channel->address,
> +						 size);
> +		if (ret < 0)
> +			return ret;
> +		*val = ret;
> +		return IIO_VAL_INT;
> +
> +	default:
> +		return -EINVAL;
> +	}
> +
> +	return -EINVAL;
> +}
> +
> +static int axp20x_adc_scale(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_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_TEMP_ADC:
> +		*val = 100;
> +		return IIO_VAL_INT;
> +
> +	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_BATT_DISCHRG_I:
> +	case AXP20X_BATT_CHRG_I:
> +		*val = 0;
> +		*val2 = 500000;
> +		return IIO_VAL_INT_PLUS_MICRO;
> +
> +	case AXP20X_IPSOUT_V:
> +		*val = 1;
> +		*val2 = 400000;
> +		return IIO_VAL_INT_PLUS_MICRO;
> +
> +	default:
> +		return -EINVAL;
> +	}
> +
> +	return -EINVAL;
> +}
> +
> +static int axp22x_adc_scale(int channel, int *val, int *val2)
> +{
> +	switch (channel) {
> +	case AXP22X_TEMP_ADC:
> +		*val = 100;
> +		return IIO_VAL_INT;
> +
> +	case AXP22X_BATT_V:
> +		*val = 1;
> +		*val2 = 100000;
> +		return IIO_VAL_INT_PLUS_MICRO;
> +
> +	case AXP22X_BATT_DISCHRG_I:
> +	case AXP22X_BATT_CHRG_I:
> +		*val = 0;
> +		*val2 = 500000;
> +		return IIO_VAL_INT_PLUS_MICRO;
> +
> +	default:
> +		return -EINVAL;
> +	}
> +
> +	return -EINVAL;
> +}
> +
> +static int axp20x_adc_offset(struct iio_dev *indio_dev, int channel, int *val)
> +{
> +	struct axp20x_adc_iio *info = iio_priv(indio_dev);
> +	int ret, reg;
> +
> +	switch (channel) {
> +	case AXP20X_TEMP_ADC:
> +		*val = -1447;
> +		return IIO_VAL_INT;
> +
> +	case AXP20X_GPIO0_V:
> +	case AXP20X_GPIO1_V:
> +		ret = regmap_read(info->regmap, AXP20X_GPIO10_IN_RANGE, &reg);
> +		if (ret < 0)
> +			return ret;
> +
> +		if (channel == AXP20X_GPIO0_V)
> +			*val = reg & AXP20X_GPIO10_IN_RANGE_GPIO0;
> +		else
> +			*val = reg & AXP20X_GPIO10_IN_RANGE_GPIO1;
> +
> +		*val = !!(*val) * 700000;
> +
> +		return IIO_VAL_INT;
> +
> +	default:
> +		return -EINVAL;
> +	}
> +
> +	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->channel, val);
> +
> +	case IIO_CHAN_INFO_SCALE:
> +		return axp20x_adc_scale(chan->channel, val, val2);
> +
> +	case IIO_CHAN_INFO_RAW:
> +		return axp20x_adc_read_raw(indio_dev, chan, val, val2);
> +
> +	default:
> +		return -EINVAL;
> +	}
> +
> +	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:
> +		*val = -2667;
> +		return IIO_VAL_INT;
> +
> +	case IIO_CHAN_INFO_SCALE:
> +		return axp22x_adc_scale(chan->channel, val, val2);
> +
> +	case IIO_CHAN_INFO_RAW:
> +		return axp22x_adc_read_raw(indio_dev, chan, val, val2);
> +
> +	default:
> +		return -EINVAL;
> +	}
> +
> +	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);
> +
> +	/*
> +	 * 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 (chan->channel != AXP20X_GPIO0_V && chan->channel != AXP20X_GPIO1_V)
> +		return -EINVAL;
> +
> +	if (val != 0 && val != 700000)
> +		return -EINVAL;
> +
> +	if (chan->channel == AXP20X_GPIO0_V)
> +		return regmap_update_bits(info->regmap, AXP20X_GPIO10_IN_RANGE,
> +					  AXP20X_GPIO10_IN_RANGE_GPIO0,
> +					  AXP20X_GPIO10_IN_RANGE_GPIO0_VAL(!!val));
> +
> +	return regmap_update_bits(info->regmap, AXP20X_GPIO10_IN_RANGE,
> +				  AXP20X_GPIO10_IN_RANGE_GPIO1,
> +				  AXP20X_GPIO10_IN_RANGE_GPIO1_VAL(!!val));
> +}
> +
> +static const struct iio_info axp20x_adc_iio_info = {
> +	.read_raw = axp20x_read_raw,
> +	.write_raw = axp20x_write_raw,
> +	.driver_module = THIS_MODULE,
> +};
> +
> +static const struct iio_info axp22x_adc_iio_info = {
> +	.read_raw = axp22x_read_raw,
> +	.driver_module = THIS_MODULE,
> +};
> +
> +static const struct of_device_id axp20x_adc_of_match[] = {
> +	{ .compatible = "x-powers,axp209-adc", .data = (void *)AXP209_ID, },
> +	{ .compatible = "x-powers,axp221-adc", .data = (void *)AXP221_ID, },
> +	{ /* sentinel */ },
> +};
> +
> +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_id;
> +
> +	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;
> +	info->indio_dev = indio_dev;
> +	indio_dev->name = dev_name(&pdev->dev);
> +	indio_dev->dev.parent = &pdev->dev;
> +	indio_dev->dev.of_node = pdev->dev.of_node;
> +	indio_dev->modes = INDIO_DIRECT_MODE;
> +
> +	axp20x_id = (int)of_device_get_match_data(&pdev->dev);
> +
> +	switch (axp20x_id) {
> +	case AXP209_ID:
> +		indio_dev->info = &axp20x_adc_iio_info;
> +		indio_dev->num_channels = ARRAY_SIZE(axp20x_adc_channels);
> +		indio_dev->channels = axp20x_adc_channels;
> +
> +		/* Enable the ADCs on IP */
> +		regmap_write(info->regmap, AXP20X_ADC_EN1, AXP20X_ADC_EN1_MASK);
> +
> +		/* 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 */
> +		regmap_update_bits(info->regmap, AXP20X_ADC_RATE,
> +				   AXP20X_ADC_RATE_MASK, AXP20X_ADC_RATE_50HZ);
> +		break;
> +
> +	case AXP221_ID:
> +		indio_dev->info = &axp22x_adc_iio_info;
> +		indio_dev->num_channels = ARRAY_SIZE(axp22x_adc_channels);
> +		indio_dev->channels = axp22x_adc_channels;
> +
> +		/* Enable the ADCs on IP */
> +		regmap_write(info->regmap, AXP20X_ADC_EN1, AXP22X_ADC_EN1_MASK);
> +
> +		/* Configure ADCs rate */
> +		regmap_update_bits(info->regmap, AXP20X_ADC_RATE,
> +				   AXP20X_ADC_RATE_MASK, AXP22X_ADC_RATE_200HZ);
> +		break;
> +
> +	default:
> +		return -EINVAL;
> +	}
> +
> +	ret = devm_iio_device_register(&pdev->dev, indio_dev);
> +	if (ret < 0) {
> +		dev_err(&pdev->dev, "could not register the device\n");
> +		regmap_write(info->regmap, AXP20X_ADC_EN1, 0);
> +		regmap_write(info->regmap, AXP20X_ADC_EN2, 0);
> +		return ret;
> +	}
> +
> +	return 0;
> +}
> +
> +static int axp20x_remove(struct platform_device *pdev)
> +{
> +	struct axp20x_adc_iio *info;
> +	struct iio_dev *indio_dev = platform_get_drvdata(pdev);
> +
> +	info = iio_priv(indio_dev);
> +	regmap_write(info->regmap, AXP20X_ADC_EN1, 0);
> +	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,
> +	},
> +	.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@...e-electrons.com>");
> +MODULE_LICENSE("GPL");
> diff --git a/include/linux/mfd/axp20x.h b/include/linux/mfd/axp20x.h
> index a4860bc..650c6f6 100644
> --- a/include/linux/mfd/axp20x.h
> +++ b/include/linux/mfd/axp20x.h
> @@ -150,6 +150,10 @@ enum {
>  #define AXP20X_VBUS_I_ADC_L		0x5d
>  #define AXP20X_TEMP_ADC_H		0x5e
>  #define AXP20X_TEMP_ADC_L		0x5f
> +
> +#define AXP22X_TEMP_ADC_H		0x56
> +#define AXP22X_TEMP_ADC_L		0x57
> +
>  #define AXP20X_TS_IN_H			0x62
>  #define AXP20X_TS_IN_L			0x63
>  #define AXP20X_GPIO0_V_ADC_H		0x64
> 

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