On Tue, 04 Apr 2017, 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 Applied, thanks. > 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"); -- Lee Jones Linaro STMicroelectronics Landing Team Lead Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog -- 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
