diff options
Diffstat (limited to 'drivers/acpi/pmic/intel_pmic_xpower.c')
-rw-r--r-- | drivers/acpi/pmic/intel_pmic_xpower.c | 367 |
1 files changed, 367 insertions, 0 deletions
diff --git a/drivers/acpi/pmic/intel_pmic_xpower.c b/drivers/acpi/pmic/intel_pmic_xpower.c new file mode 100644 index 000000000..61bbe4c24 --- /dev/null +++ b/drivers/acpi/pmic/intel_pmic_xpower.c @@ -0,0 +1,367 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * XPower AXP288 PMIC operation region driver + * + * Copyright (C) 2014 Intel Corporation. All rights reserved. + */ + +#include <linux/acpi.h> +#include <linux/init.h> +#include <linux/mfd/axp20x.h> +#include <linux/regmap.h> +#include <linux/platform_device.h> +#include <asm/iosf_mbi.h> +#include "intel_pmic.h" + +#define XPOWER_GPADC_LOW 0x5b +#define XPOWER_GPI1_CTRL 0x92 + +#define GPI1_LDO_MASK GENMASK(2, 0) +#define GPI1_LDO_ON (3 << 0) +#define GPI1_LDO_OFF (4 << 0) + +#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) + +static struct pmic_table power_table[] = { + { + .address = 0x00, + .reg = 0x13, + .bit = 0x05, + }, /* ALD1 */ + { + .address = 0x04, + .reg = 0x13, + .bit = 0x06, + }, /* ALD2 */ + { + .address = 0x08, + .reg = 0x13, + .bit = 0x07, + }, /* ALD3 */ + { + .address = 0x0c, + .reg = 0x12, + .bit = 0x03, + }, /* DLD1 */ + { + .address = 0x10, + .reg = 0x12, + .bit = 0x04, + }, /* DLD2 */ + { + .address = 0x14, + .reg = 0x12, + .bit = 0x05, + }, /* DLD3 */ + { + .address = 0x18, + .reg = 0x12, + .bit = 0x06, + }, /* DLD4 */ + { + .address = 0x1c, + .reg = 0x12, + .bit = 0x00, + }, /* ELD1 */ + { + .address = 0x20, + .reg = 0x12, + .bit = 0x01, + }, /* ELD2 */ + { + .address = 0x24, + .reg = 0x12, + .bit = 0x02, + }, /* ELD3 */ + { + .address = 0x28, + .reg = 0x13, + .bit = 0x02, + }, /* FLD1 */ + { + .address = 0x2c, + .reg = 0x13, + .bit = 0x03, + }, /* FLD2 */ + { + .address = 0x30, + .reg = 0x13, + .bit = 0x04, + }, /* FLD3 */ + { + .address = 0x34, + .reg = 0x10, + .bit = 0x03, + }, /* BUC1 */ + { + .address = 0x38, + .reg = 0x10, + .bit = 0x06, + }, /* BUC2 */ + { + .address = 0x3c, + .reg = 0x10, + .bit = 0x05, + }, /* BUC3 */ + { + .address = 0x40, + .reg = 0x10, + .bit = 0x04, + }, /* BUC4 */ + { + .address = 0x44, + .reg = 0x10, + .bit = 0x01, + }, /* BUC5 */ + { + .address = 0x48, + .reg = 0x10, + .bit = 0x00 + }, /* BUC6 */ + { + .address = 0x4c, + .reg = 0x92, + }, /* GPI1 */ +}; + +/* TMP0 - TMP5 are the same, all from GPADC */ +static struct pmic_table thermal_table[] = { + { + .address = 0x00, + .reg = XPOWER_GPADC_LOW + }, + { + .address = 0x0c, + .reg = XPOWER_GPADC_LOW + }, + { + .address = 0x18, + .reg = XPOWER_GPADC_LOW + }, + { + .address = 0x24, + .reg = XPOWER_GPADC_LOW + }, + { + .address = 0x30, + .reg = XPOWER_GPADC_LOW + }, + { + .address = 0x3c, + .reg = XPOWER_GPADC_LOW + }, +}; + +static int intel_xpower_pmic_get_power(struct regmap *regmap, int reg, + int bit, u64 *value) +{ + int data; + + if (regmap_read(regmap, reg, &data)) + return -EIO; + + /* GPIO1 LDO regulator needs special handling */ + if (reg == XPOWER_GPI1_CTRL) + *value = ((data & GPI1_LDO_MASK) == GPI1_LDO_ON); + else + *value = (data & BIT(bit)) ? 1 : 0; + + return 0; +} + +static int intel_xpower_pmic_update_power(struct regmap *regmap, int reg, + int bit, bool on) +{ + int data, ret; + + ret = iosf_mbi_block_punit_i2c_access(); + if (ret) + return ret; + + /* GPIO1 LDO regulator needs special handling */ + if (reg == XPOWER_GPI1_CTRL) { + ret = regmap_update_bits(regmap, reg, GPI1_LDO_MASK, + on ? GPI1_LDO_ON : GPI1_LDO_OFF); + goto out; + } + + if (regmap_read(regmap, reg, &data)) { + ret = -EIO; + goto out; + } + + if (on) + data |= BIT(bit); + else + data &= ~BIT(bit); + + if (regmap_write(regmap, reg, data)) + ret = -EIO; +out: + iosf_mbi_unblock_punit_i2c_access(); + + return ret; +} + +/** + * intel_xpower_pmic_get_raw_temp(): Get raw temperature reading from the PMIC + * + * @regmap: regmap of the PMIC device + * @reg: register to get the reading + * + * Return a positive value on success, errno on failure. + */ +static int intel_xpower_pmic_get_raw_temp(struct regmap *regmap, int reg) +{ + int ret, adc_ts_pin_ctrl; + u8 buf[2]; + + /* + * 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. + * + * Note that the switching from on to on-ondemand is not necessary + * when the TS current-source is off (this happens on devices which + * do not use the TS-pin). + */ + ret = regmap_read(regmap, AXP288_ADC_TS_PIN_CTRL, &adc_ts_pin_ctrl); + if (ret) + return ret; + + if (adc_ts_pin_ctrl & AXP288_ADC_TS_CURRENT_ON_OFF_MASK) { + /* + * AXP288_ADC_TS_PIN_CTRL reads are cached by the regmap, so + * this does to a single I2C-transfer, and thus there is no + * need to explicitly call iosf_mbi_block_punit_i2c_access(). + */ + ret = regmap_update_bits(regmap, AXP288_ADC_TS_PIN_CTRL, + AXP288_ADC_TS_CURRENT_ON_OFF_MASK, + AXP288_ADC_TS_CURRENT_ON_ONDEMAND); + if (ret) + return ret; + + /* Wait a bit after switching the current-source */ + usleep_range(6000, 10000); + } + + ret = iosf_mbi_block_punit_i2c_access(); + if (ret) + return ret; + + ret = regmap_bulk_read(regmap, AXP288_GP_ADC_H, buf, 2); + if (ret == 0) + ret = (buf[0] << 4) + ((buf[1] >> 4) & 0x0f); + + if (adc_ts_pin_ctrl & AXP288_ADC_TS_CURRENT_ON_OFF_MASK) { + regmap_update_bits(regmap, AXP288_ADC_TS_PIN_CTRL, + AXP288_ADC_TS_CURRENT_ON_OFF_MASK, + AXP288_ADC_TS_CURRENT_ON); + } + + iosf_mbi_unblock_punit_i2c_access(); + + return ret; +} + +static int intel_xpower_exec_mipi_pmic_seq_element(struct regmap *regmap, + u16 i2c_address, u32 reg_address, + u32 value, u32 mask) +{ + int ret; + + if (i2c_address != 0x34) { + pr_err("%s: Unexpected i2c-addr: 0x%02x (reg-addr 0x%x value 0x%x mask 0x%x)\n", + __func__, i2c_address, reg_address, value, mask); + return -ENXIO; + } + + ret = iosf_mbi_block_punit_i2c_access(); + if (ret) + return ret; + + ret = regmap_update_bits(regmap, reg_address, mask, value); + + iosf_mbi_unblock_punit_i2c_access(); + + return ret; +} + +static int intel_xpower_lpat_raw_to_temp(struct acpi_lpat_conversion_table *lpat_table, + int raw) +{ + struct acpi_lpat first = lpat_table->lpat[0]; + struct acpi_lpat last = lpat_table->lpat[lpat_table->lpat_count - 1]; + + /* + * Some LPAT tables in the ACPI Device for the AXP288 PMIC for some + * reason only describe a small temperature range, e.g. 27° - 37° + * Celcius. Resulting in errors when the tablet is idle in a cool room. + * + * To avoid these errors clamp the raw value to be inside the LPAT. + */ + if (first.raw < last.raw) + raw = clamp(raw, first.raw, last.raw); + else + raw = clamp(raw, last.raw, first.raw); + + return acpi_lpat_raw_to_temp(lpat_table, raw); +} + +static const struct intel_pmic_opregion_data intel_xpower_pmic_opregion_data = { + .get_power = intel_xpower_pmic_get_power, + .update_power = intel_xpower_pmic_update_power, + .get_raw_temp = intel_xpower_pmic_get_raw_temp, + .exec_mipi_pmic_seq_element = intel_xpower_exec_mipi_pmic_seq_element, + .lpat_raw_to_temp = intel_xpower_lpat_raw_to_temp, + .power_table = power_table, + .power_table_count = ARRAY_SIZE(power_table), + .thermal_table = thermal_table, + .thermal_table_count = ARRAY_SIZE(thermal_table), + .pmic_i2c_address = 0x34, +}; + +static acpi_status intel_xpower_pmic_gpio_handler(u32 function, + acpi_physical_address address, u32 bit_width, u64 *value, + void *handler_context, void *region_context) +{ + return AE_OK; +} + +static int intel_xpower_pmic_opregion_probe(struct platform_device *pdev) +{ + struct device *parent = pdev->dev.parent; + struct axp20x_dev *axp20x = dev_get_drvdata(parent); + acpi_status status; + int result; + + status = acpi_install_address_space_handler(ACPI_HANDLE(parent), + ACPI_ADR_SPACE_GPIO, intel_xpower_pmic_gpio_handler, + NULL, NULL); + if (ACPI_FAILURE(status)) + return -ENODEV; + + result = intel_pmic_install_opregion_handler(&pdev->dev, + ACPI_HANDLE(parent), axp20x->regmap, + &intel_xpower_pmic_opregion_data); + if (result) + acpi_remove_address_space_handler(ACPI_HANDLE(parent), + ACPI_ADR_SPACE_GPIO, + intel_xpower_pmic_gpio_handler); + + return result; +} + +static struct platform_driver intel_xpower_pmic_opregion_driver = { + .probe = intel_xpower_pmic_opregion_probe, + .driver = { + .name = "axp288_pmic_acpi", + }, +}; +builtin_platform_driver(intel_xpower_pmic_opregion_driver); |