Hi Lee, On 10/04/2017 16:54, Lee Jones wrote: > On Mon, 10 Apr 2017, Quentin Schulz wrote: > >> Hi Lee, >> >> Just to make sure you didn't miss that patch (can't find it in >> for-mfd-next and for-mfd-next-next). > > It has not been missed, but is yet to be reviewed. > Hum.. What do you mean exactly? The maintainer of the AXP PMICs has given its Acked-by and the maintainer of the IIO subsystem has given its Reviewed-by. Is there something I'm missing (in your workflow maybe)? Thanks, Quentin >> On 04/04/2017 08:34, 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@xxxxxxxxxxxxxxxxxx> >>> Acked-by: Maxime Ripard <maxime.ripard@xxxxxxxxxxxxxxxxxx> >>> Acked-by: Chen-Yu Tsai <wens@xxxxxxxx> >>> Reviewed-by: Jonathan Cameron <jic23@xxxxxxxxxx> >>> --- >>> >>> Lee, could you merge this through the mfd tree please? >>> => https://lkml.org/lkml/2017/3/22/47 >>> >>> v4: >>> - added missing space at the beginning of a comment, >>> - tidied axp20x_adc_offset_voltage and axp20x_write_raw to use switch case >>> instead of if conditions, >>> - added MODULE_DEVICE_TABLE for axp20x_adc_id_match for module autoloading, >>> - merged two lines in axp20x_remove, >>> >>> v3: >>> - moved from switch to if condition in axp20x_adc_raw and >>> axp22x_adc_raw, >>> - removed DT support as DT node has been dropped, >>> - use of platform_device_id >>> - correctly defined the name of the iio device (name used to probe the >>> driver), >>> - added goto for errors in probe, >>> - added iio_map_array_unregister to the remove function, >>> >>> v2: >>> - removed unused defines, >>> - changed BIT(x) to 1 << x when describing bits purpose for which 2 << >>> x or 3 << x exists, to be consistent, >>> - changed ADC rate defines to macro formulas, >>> - reordered IIO channels, now different measures (current/voltage) of >>> the same part of the PMIC (e.g. battery), have the same IIO channel in >>> their respective IIO type. When a part of the PMIC have only one >>> measure, a number is jumped, >>> - left IIO channel mapping in DT to use iio_map structure, >>> - removed indexing of ADC internal temperature, >>> - removed unused iio_dev structure in axp20x_adc_iio, >>> - added a structure for data specific to AXP20X or AXP22X PMICs instead >>> of using an ID and an if condition when needing to separate the >>> behaviour of both, >>> - added a comment on batt_chrg_i really being on 12bits rather than >>> what the Chinese datasheets say (13 bits), >>> - corrected the offset for AXP22X PMIC temperature, >>> - set the ADC rate to a value (100Hz) shared by the AXP20X and AXP22X, >>> - created macro formulas to compute the ADC rate for each, >>> - added a condition on presence of ADC_EN2 reg before setting/resetting >>> it, >>> - switched from devm_iio_device_unregister to the non-devm function >>> because of the need for a remove function, >>> - removed some dead code, >>> >>> drivers/iio/adc/Kconfig | 10 + >>> drivers/iio/adc/Makefile | 1 + >>> drivers/iio/adc/axp20x_adc.c | 617 +++++++++++++++++++++++++++++++++++++++++++ >>> 3 files changed, 628 insertions(+) >>> create mode 100644 drivers/iio/adc/axp20x_adc.c >>> >>> diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig >>> index d777a97..d15e1bd 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 b11bb57..17899b5 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..11e1771 >>> --- /dev/null >>> +++ b/drivers/iio/adc/axp20x_adc.c >>> @@ -0,0 +1,617 @@ >>> +/* ADC driver for AXP20X and AXP22X PMICs >>> + * >>> + * Copyright (c) 2016 Free Electrons NextThing Co. >>> + * Quentin Schulz <quentin.schulz@xxxxxxxxxxxxxxxxxx> >>> + * >>> + * 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. >>> + */ >>> + >>> +#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/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 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 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; >>> + 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, >>> +}; >>> + >>> +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), >>> +}; >>> + >>> +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), >>> +}; >>> + >>> +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); >>> + int size; >>> + >>> + /* >>> + * 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 == AXP22X_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 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; >>> + >>> + 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: >>> + if (chan->channel != AXP22X_BATT_V) >>> + return -EINVAL; >>> + >>> + *val = 1; >>> + *val2 = 100000; >>> + return IIO_VAL_INT_PLUS_MICRO; >>> + >>> + case IIO_CURRENT: >>> + *val = 0; >>> + *val2 = 500000; >>> + return IIO_VAL_INT_PLUS_MICRO; >>> + >>> + 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; >>> + >>> + 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: >>> + *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 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; >>> + >>> + 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, >>> + .driver_module = THIS_MODULE, >>> +}; >>> + >>> +static const struct iio_info axp22x_adc_iio_info = { >>> + .read_raw = axp22x_read_raw, >>> + .driver_module = THIS_MODULE, >>> +}; >>> + >>> +static int axp20x_adc_rate(int rate) >>> +{ >>> + return AXP20X_ADC_RATE_HZ(rate); >>> +} >>> + >>> +static int axp22x_adc_rate(int rate) >>> +{ >>> + return AXP22X_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)(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 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, }, >>> + { /* 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->dev.parent = &pdev->dev; >>> + indio_dev->dev.of_node = pdev->dev.of_node; >>> + indio_dev->modes = INDIO_DIRECT_MODE; >>> + >>> + info->data = (struct axp_data *)platform_get_device_id(pdev)->driver_data; >>> + >>> + 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 */ >>> + regmap_update_bits(info->regmap, AXP20X_ADC_RATE, AXP20X_ADC_RATE_MASK, >>> + info->data->adc_rate(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", >>> + }, >>> + .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@xxxxxxxxxxxxxxxxxx>"); >>> +MODULE_LICENSE("GPL"); >>> >> > -- Quentin Schulz, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
