^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * axp288_adc.c - X-Powers AXP288 PMIC ADC Driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2014 Intel Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/dmi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/regmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/mfd/axp20x.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/iio/iio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/iio/machine.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/iio/driver.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * This mask enables all ADCs except for the battery temp-sensor (TS), that is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * left as-is to avoid breaking charging on devices without a temp-sensor.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #define AXP288_ADC_EN_MASK 0xF0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define AXP288_ADC_TS_ENABLE 0x01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define AXP288_ADC_TS_BIAS_MASK GENMASK(5, 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #define AXP288_ADC_TS_BIAS_20UA (0 << 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define AXP288_ADC_TS_BIAS_40UA (1 << 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #define AXP288_ADC_TS_BIAS_60UA (2 << 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #define AXP288_ADC_TS_BIAS_80UA (3 << 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #define AXP288_ADC_TS_CURRENT_ON_OFF_MASK GENMASK(1, 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #define AXP288_ADC_TS_CURRENT_OFF (0 << 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #define AXP288_ADC_TS_CURRENT_ON_WHEN_CHARGING (1 << 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #define AXP288_ADC_TS_CURRENT_ON_ONDEMAND (2 << 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #define AXP288_ADC_TS_CURRENT_ON (3 << 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) enum axp288_adc_id {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) AXP288_ADC_TS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) AXP288_ADC_PMIC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) AXP288_ADC_GP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) AXP288_ADC_BATT_CHRG_I,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) AXP288_ADC_BATT_DISCHRG_I,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) AXP288_ADC_BATT_V,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) AXP288_ADC_NR_CHAN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) struct axp288_adc_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) int irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) struct regmap *regmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) bool ts_enabled;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) static const struct iio_chan_spec axp288_adc_channels[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) .indexed = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) .type = IIO_TEMP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) .channel = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) .address = AXP288_TS_ADC_H,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) .datasheet_name = "TS_PIN",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) }, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) .indexed = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) .type = IIO_TEMP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) .channel = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) .address = AXP288_PMIC_ADC_H,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) .datasheet_name = "PMIC_TEMP",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) }, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) .indexed = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) .type = IIO_TEMP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) .channel = 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) .address = AXP288_GP_ADC_H,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) .datasheet_name = "GPADC",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) }, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) .indexed = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) .type = IIO_CURRENT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) .channel = 3,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) .address = AXP20X_BATT_CHRG_I_H,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) .datasheet_name = "BATT_CHG_I",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) }, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) .indexed = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) .type = IIO_CURRENT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) .channel = 4,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) .address = AXP20X_BATT_DISCHRG_I_H,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) .datasheet_name = "BATT_DISCHRG_I",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) }, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) .indexed = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) .type = IIO_VOLTAGE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) .channel = 5,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) .address = AXP20X_BATT_V_H,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) .datasheet_name = "BATT_V",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) /* for consumer drivers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) static struct iio_map axp288_adc_default_maps[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) IIO_MAP("TS_PIN", "axp288-batt", "axp288-batt-temp"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) IIO_MAP("PMIC_TEMP", "axp288-pmic", "axp288-pmic-temp"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) IIO_MAP("GPADC", "axp288-gpadc", "axp288-system-temp"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) IIO_MAP("BATT_CHG_I", "axp288-chrg", "axp288-chrg-curr"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) IIO_MAP("BATT_DISCHRG_I", "axp288-chrg", "axp288-chrg-d-curr"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) IIO_MAP("BATT_V", "axp288-batt", "axp288-batt-volt"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) {},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) static int axp288_adc_read_channel(int *val, unsigned long address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) struct regmap *regmap)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) u8 buf[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) if (regmap_bulk_read(regmap, address, buf, 2))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) *val = (buf[0] << 4) + ((buf[1] >> 4) & 0x0F);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) return IIO_VAL_INT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) * The current-source used for the battery temp-sensor (TS) is shared
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) * with the GPADC. For proper fuel-gauge and charger operation the TS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) * current-source needs to be permanently on. But to read the GPADC we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) * need to temporary switch the TS current-source to ondemand, so that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) * the GPADC can use it, otherwise we will always read an all 0 value.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) static int axp288_adc_set_ts(struct axp288_adc_info *info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) unsigned int mode, unsigned long address)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) /* No need to switch the current-source if the TS pin is disabled */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) if (!info->ts_enabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) /* Channels other than GPADC do not need the current source */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) if (address != AXP288_GP_ADC_H)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) ret = regmap_update_bits(info->regmap, AXP288_ADC_TS_PIN_CTRL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) AXP288_ADC_TS_CURRENT_ON_OFF_MASK, mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) /* When switching to the GPADC pin give things some time to settle */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) if (mode == AXP288_ADC_TS_CURRENT_ON_ONDEMAND)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) usleep_range(6000, 10000);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) static int axp288_adc_read_raw(struct iio_dev *indio_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) struct iio_chan_spec const *chan,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) int *val, int *val2, long mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) struct axp288_adc_info *info = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) mutex_lock(&indio_dev->mlock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) switch (mask) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) case IIO_CHAN_INFO_RAW:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) if (axp288_adc_set_ts(info, AXP288_ADC_TS_CURRENT_ON_ONDEMAND,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) chan->address)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) dev_err(&indio_dev->dev, "GPADC mode\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) ret = axp288_adc_read_channel(val, chan->address, info->regmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) if (axp288_adc_set_ts(info, AXP288_ADC_TS_CURRENT_ON,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) chan->address))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) dev_err(&indio_dev->dev, "TS pin restore\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) mutex_unlock(&indio_dev->mlock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) * We rely on the machine's firmware to correctly setup the TS pin bias current
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) * at boot. This lists systems with broken fw where we need to set it ourselves.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) static const struct dmi_system_id axp288_adc_ts_bias_override[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) /* Lenovo Ideapad 100S (11 inch) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) .matches = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad 100S-11IBY"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) .driver_data = (void *)(uintptr_t)AXP288_ADC_TS_BIAS_80UA,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) static int axp288_adc_initialize(struct axp288_adc_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) const struct dmi_system_id *bias_override;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) int ret, adc_enable_val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) bias_override = dmi_first_match(axp288_adc_ts_bias_override);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) if (bias_override) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) ret = regmap_update_bits(info->regmap, AXP288_ADC_TS_PIN_CTRL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) AXP288_ADC_TS_BIAS_MASK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) (uintptr_t)bias_override->driver_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) * Determine if the TS pin is enabled and set the TS current-source
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) * accordingly.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) ret = regmap_read(info->regmap, AXP20X_ADC_EN1, &adc_enable_val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) if (adc_enable_val & AXP288_ADC_TS_ENABLE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) info->ts_enabled = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) ret = regmap_update_bits(info->regmap, AXP288_ADC_TS_PIN_CTRL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) AXP288_ADC_TS_CURRENT_ON_OFF_MASK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) AXP288_ADC_TS_CURRENT_ON);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) info->ts_enabled = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) ret = regmap_update_bits(info->regmap, AXP288_ADC_TS_PIN_CTRL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) AXP288_ADC_TS_CURRENT_ON_OFF_MASK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) AXP288_ADC_TS_CURRENT_OFF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) /* Turn on the ADC for all channels except TS, leave TS as is */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) return regmap_update_bits(info->regmap, AXP20X_ADC_EN1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) AXP288_ADC_EN_MASK, AXP288_ADC_EN_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) static const struct iio_info axp288_adc_iio_info = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) .read_raw = &axp288_adc_read_raw,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) static int axp288_adc_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) struct axp288_adc_info *info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) struct iio_dev *indio_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*info));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) if (!indio_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) info = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) info->irq = platform_get_irq(pdev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) if (info->irq < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) return info->irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) platform_set_drvdata(pdev, indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) info->regmap = axp20x->regmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) * Set ADC to enabled state at all time, including system suspend.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) * otherwise internal fuel gauge functionality may be affected.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) ret = axp288_adc_initialize(info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) dev_err(&pdev->dev, "unable to enable ADC device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) indio_dev->name = pdev->name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) indio_dev->channels = axp288_adc_channels;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) indio_dev->num_channels = ARRAY_SIZE(axp288_adc_channels);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) indio_dev->info = &axp288_adc_iio_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) indio_dev->modes = INDIO_DIRECT_MODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) ret = iio_map_array_register(indio_dev, axp288_adc_default_maps);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) ret = iio_device_register(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) dev_err(&pdev->dev, "unable to register iio device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) goto err_array_unregister;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) err_array_unregister:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) iio_map_array_unregister(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) static int axp288_adc_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) struct iio_dev *indio_dev = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) iio_device_unregister(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) iio_map_array_unregister(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) static const struct platform_device_id axp288_adc_id_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) { .name = "axp288_adc" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) {},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) static struct platform_driver axp288_adc_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) .probe = axp288_adc_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) .remove = axp288_adc_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) .id_table = axp288_adc_id_table,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) .name = "axp288_adc",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) MODULE_DEVICE_TABLE(platform, axp288_adc_id_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) module_platform_driver(axp288_adc_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) MODULE_AUTHOR("Jacob Pan <jacob.jun.pan@linux.intel.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) MODULE_DESCRIPTION("X-Powers AXP288 ADC Driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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