| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Jacob jun Pan | 746 | 60.31% | 2 | 15.38% |
| Hans de Goede | 425 | 34.36% | 5 | 38.46% |
| Aaron Lu | 29 | 2.34% | 1 | 7.69% |
| Nuno Sá | 20 | 1.62% | 1 | 7.69% |
| Alexandru Ardelean | 8 | 0.65% | 1 | 7.69% |
| Lukas Wunner | 6 | 0.49% | 1 | 7.69% |
| Thomas Gleixner | 2 | 0.16% | 1 | 7.69% |
| Krzysztof Kozlowski | 1 | 0.08% | 1 | 7.69% |
| Total | 1237 | 13 |
// SPDX-License-Identifier: GPL-2.0-only /* * axp288_adc.c - X-Powers AXP288 PMIC ADC Driver * * Copyright (C) 2014 Intel Corporation * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ #include <linux/dmi.h> #include <linux/module.h> #include <linux/mutex.h> #include <linux/kernel.h> #include <linux/device.h> #include <linux/regmap.h> #include <linux/mfd/axp20x.h> #include <linux/platform_device.h> #include <linux/iio/iio.h> #include <linux/iio/machine.h> #include <linux/iio/driver.h> /* * This mask enables all ADCs except for the battery temp-sensor (TS), that is * left as-is to avoid breaking charging on devices without a temp-sensor. */ #define AXP288_ADC_EN_MASK 0xF0 #define AXP288_ADC_TS_ENABLE 0x01 #define AXP288_ADC_TS_BIAS_MASK GENMASK(5, 4) #define AXP288_ADC_TS_BIAS_20UA (0 << 4) #define AXP288_ADC_TS_BIAS_40UA (1 << 4) #define AXP288_ADC_TS_BIAS_60UA (2 << 4) #define AXP288_ADC_TS_BIAS_80UA (3 << 4) #define AXP288_ADC_TS_CURRENT_ON_OFF_MASK GENMASK(1, 0) #define AXP288_ADC_TS_CURRENT_OFF (0 << 0) #define AXP288_ADC_TS_CURRENT_ON_WHEN_CHARGING (1 << 0) #define AXP288_ADC_TS_CURRENT_ON_ONDEMAND (2 << 0) #define AXP288_ADC_TS_CURRENT_ON (3 << 0) enum axp288_adc_id { AXP288_ADC_TS, AXP288_ADC_PMIC, AXP288_ADC_GP, AXP288_ADC_BATT_CHRG_I, AXP288_ADC_BATT_DISCHRG_I, AXP288_ADC_BATT_V, AXP288_ADC_NR_CHAN, }; struct axp288_adc_info { int irq; struct regmap *regmap; /* lock to protect against multiple access to the device */ struct mutex lock; bool ts_enabled; }; static const struct iio_chan_spec axp288_adc_channels[] = { { .indexed = 1, .type = IIO_TEMP, .channel = 0, .address = AXP288_TS_ADC_H, .datasheet_name = "TS_PIN", .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), }, { .indexed = 1, .type = IIO_TEMP, .channel = 1, .address = AXP288_PMIC_ADC_H, .datasheet_name = "PMIC_TEMP", .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), }, { .indexed = 1, .type = IIO_TEMP, .channel = 2, .address = AXP288_GP_ADC_H, .datasheet_name = "GPADC", .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), }, { .indexed = 1, .type = IIO_CURRENT, .channel = 3, .address = AXP20X_BATT_CHRG_I_H, .datasheet_name = "BATT_CHG_I", .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), }, { .indexed = 1, .type = IIO_CURRENT, .channel = 4, .address = AXP20X_BATT_DISCHRG_I_H, .datasheet_name = "BATT_DISCHRG_I", .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), }, { .indexed = 1, .type = IIO_VOLTAGE, .channel = 5, .address = AXP20X_BATT_V_H, .datasheet_name = "BATT_V", .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), }, }; /* for consumer drivers */ static struct iio_map axp288_adc_default_maps[] = { IIO_MAP("TS_PIN", "axp288-batt", "axp288-batt-temp"), IIO_MAP("PMIC_TEMP", "axp288-pmic", "axp288-pmic-temp"), IIO_MAP("GPADC", "axp288-gpadc", "axp288-system-temp"), IIO_MAP("BATT_CHG_I", "axp288-chrg", "axp288-chrg-curr"), IIO_MAP("BATT_DISCHRG_I", "axp288-chrg", "axp288-chrg-d-curr"), IIO_MAP("BATT_V", "axp288-batt", "axp288-batt-volt"), {}, }; static int axp288_adc_read_channel(int *val, unsigned long address, struct regmap *regmap) { u8 buf[2]; if (regmap_bulk_read(regmap, address, buf, 2)) return -EIO; *val = (buf[0] << 4) + ((buf[1] >> 4) & 0x0F); return IIO_VAL_INT; } /* * The current-source used for the battery temp-sensor (TS) is shared * with the GPADC. For proper fuel-gauge and charger operation the TS * current-source needs to be permanently on. But to read the GPADC we * need to temporary switch the TS current-source to ondemand, so that * the GPADC can use it, otherwise we will always read an all 0 value. */ static int axp288_adc_set_ts(struct axp288_adc_info *info, unsigned int mode, unsigned long address) { int ret; /* No need to switch the current-source if the TS pin is disabled */ if (!info->ts_enabled) return 0; /* Channels other than GPADC do not need the current source */ if (address != AXP288_GP_ADC_H) return 0; ret = regmap_update_bits(info->regmap, AXP288_ADC_TS_PIN_CTRL, AXP288_ADC_TS_CURRENT_ON_OFF_MASK, mode); if (ret) return ret; /* When switching to the GPADC pin give things some time to settle */ if (mode == AXP288_ADC_TS_CURRENT_ON_ONDEMAND) usleep_range(6000, 10000); return 0; } static int axp288_adc_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) { int ret; struct axp288_adc_info *info = iio_priv(indio_dev); mutex_lock(&info->lock); switch (mask) { case IIO_CHAN_INFO_RAW: if (axp288_adc_set_ts(info, AXP288_ADC_TS_CURRENT_ON_ONDEMAND, chan->address)) { dev_err(&indio_dev->dev, "GPADC mode\n"); ret = -EINVAL; break; } ret = axp288_adc_read_channel(val, chan->address, info->regmap); if (axp288_adc_set_ts(info, AXP288_ADC_TS_CURRENT_ON, chan->address)) dev_err(&indio_dev->dev, "TS pin restore\n"); break; default: ret = -EINVAL; } mutex_unlock(&info->lock); return ret; } /* * We rely on the machine's firmware to correctly setup the TS pin bias current * at boot. This lists systems with broken fw where we need to set it ourselves. */ static const struct dmi_system_id axp288_adc_ts_bias_override[] = { { /* Lenovo Ideapad 100S (11 inch) */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad 100S-11IBY"), }, .driver_data = (void *)(uintptr_t)AXP288_ADC_TS_BIAS_80UA, }, { /* Nuvision Solo 10 Draw */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "TMAX"), DMI_MATCH(DMI_PRODUCT_NAME, "TM101W610L"), }, .driver_data = (void *)(uintptr_t)AXP288_ADC_TS_BIAS_80UA, }, {} }; static int axp288_adc_initialize(struct axp288_adc_info *info) { const struct dmi_system_id *bias_override; int ret, adc_enable_val; bias_override = dmi_first_match(axp288_adc_ts_bias_override); if (bias_override) { ret = regmap_update_bits(info->regmap, AXP288_ADC_TS_PIN_CTRL, AXP288_ADC_TS_BIAS_MASK, (uintptr_t)bias_override->driver_data); if (ret) return ret; } /* * Determine if the TS pin is enabled and set the TS current-source * accordingly. */ ret = regmap_read(info->regmap, AXP20X_ADC_EN1, &adc_enable_val); if (ret) return ret; if (adc_enable_val & AXP288_ADC_TS_ENABLE) { info->ts_enabled = true; ret = regmap_update_bits(info->regmap, AXP288_ADC_TS_PIN_CTRL, AXP288_ADC_TS_CURRENT_ON_OFF_MASK, AXP288_ADC_TS_CURRENT_ON); } else { info->ts_enabled = false; ret = regmap_update_bits(info->regmap, AXP288_ADC_TS_PIN_CTRL, AXP288_ADC_TS_CURRENT_ON_OFF_MASK, AXP288_ADC_TS_CURRENT_OFF); } if (ret) return ret; /* Turn on the ADC for all channels except TS, leave TS as is */ return regmap_update_bits(info->regmap, AXP20X_ADC_EN1, AXP288_ADC_EN_MASK, AXP288_ADC_EN_MASK); } static const struct iio_info axp288_adc_iio_info = { .read_raw = &axp288_adc_read_raw, }; static int axp288_adc_probe(struct platform_device *pdev) { int ret; struct axp288_adc_info *info; struct iio_dev *indio_dev; struct axp20x_dev *axp20x = 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); info->irq = platform_get_irq(pdev, 0); if (info->irq < 0) return info->irq; info->regmap = axp20x->regmap; /* * Set ADC to enabled state at all time, including system suspend. * otherwise internal fuel gauge functionality may be affected. */ ret = axp288_adc_initialize(info); if (ret) { dev_err(&pdev->dev, "unable to enable ADC device\n"); return ret; } indio_dev->name = pdev->name; indio_dev->channels = axp288_adc_channels; indio_dev->num_channels = ARRAY_SIZE(axp288_adc_channels); indio_dev->info = &axp288_adc_iio_info; indio_dev->modes = INDIO_DIRECT_MODE; ret = devm_iio_map_array_register(&pdev->dev, indio_dev, axp288_adc_default_maps); if (ret < 0) return ret; mutex_init(&info->lock); return devm_iio_device_register(&pdev->dev, indio_dev); } static const struct platform_device_id axp288_adc_id_table[] = { { .name = "axp288_adc" }, {}, }; static struct platform_driver axp288_adc_driver = { .probe = axp288_adc_probe, .id_table = axp288_adc_id_table, .driver = { .name = "axp288_adc", }, }; MODULE_DEVICE_TABLE(platform, axp288_adc_id_table); module_platform_driver(axp288_adc_driver); MODULE_AUTHOR("Jacob Pan <jacob.jun.pan@linux.intel.com>"); MODULE_DESCRIPTION("X-Powers AXP288 ADC Driver"); MODULE_LICENSE("GPL");
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