path: root/drivers/iio/adc/axp20x_adc.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/unaligned.h>
#include <linux/bitfield.h>
#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 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 AXP717_ADC_EN1_MASK			GENMASK(7, 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)

#define AXP20X_ADC_RATE_MASK			GENMASK(7, 6)
#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 AXP717_ADC_DATA_TS			0x00
#define AXP717_ADC_DATA_TEMP			0x01
#define AXP717_ADC_DATA_VMID			0x02
#define AXP717_ADC_DATA_BKUP_BATT		0x03

#define AXP717_ADC_DATA_MASK			GENMASK(13, 0)

#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 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 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,
	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 axp717_adc_channel_v {
	AXP717_BATT_V = 0,
	AXP717_TS_IN,
	AXP717_VBUS_V,
	AXP717_VSYS_V,
	AXP717_DIE_TEMP_V,
	AXP717_VMID_V = 6,
	AXP717_BKUP_BATT_V,
};

enum axp717_adc_channel_i {
	AXP717_BATT_CHRG_I = 5,
};

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",