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1// SPDX-License-Identifier: GPL-2.02/*3 * MFD core driver for Intel Cherrytrail Whiskey Cove PMIC4 *5 * Copyright (C) 2017 Hans de Goede <hdegoede@redhat.com>6 *7 * Based on various non upstream patches to support the CHT Whiskey Cove PMIC:8 * Copyright (C) 2013-2015 Intel Corporation. All rights reserved.9 */10 11#include <linux/acpi.h>12#include <linux/delay.h>13#include <linux/dmi.h>14#include <linux/err.h>15#include <linux/i2c.h>16#include <linux/interrupt.h>17#include <linux/kernel.h>18#include <linux/mfd/core.h>19#include <linux/mfd/intel_soc_pmic.h>20#include <linux/regmap.h>21 22/* PMIC device registers */23#define REG_OFFSET_MASK GENMASK(7, 0)24#define REG_ADDR_MASK GENMASK(15, 8)25#define REG_ADDR_SHIFT 826 27#define CHT_WC_IRQLVL1 0x6e0228#define CHT_WC_IRQLVL1_MASK 0x6e0e29 30/* Whiskey Cove PMIC share same ACPI ID between different platforms */31#define CHT_WC_HRV 332 33/* Level 1 IRQs (level 2 IRQs are handled in the child device drivers) */34enum {35 CHT_WC_PWRSRC_IRQ = 0,36 CHT_WC_THRM_IRQ,37 CHT_WC_BCU_IRQ,38 CHT_WC_ADC_IRQ,39 CHT_WC_EXT_CHGR_IRQ,40 CHT_WC_GPIO_IRQ,41 /* There is no irq 6 */42 CHT_WC_CRIT_IRQ = 7,43};44 45static const struct resource cht_wc_pwrsrc_resources[] = {46 DEFINE_RES_IRQ(CHT_WC_PWRSRC_IRQ),47};48 49static const struct resource cht_wc_ext_charger_resources[] = {50 DEFINE_RES_IRQ(CHT_WC_EXT_CHGR_IRQ),51};52 53static struct mfd_cell cht_wc_dev[] = {54 {55 .name = "cht_wcove_pwrsrc",56 .num_resources = ARRAY_SIZE(cht_wc_pwrsrc_resources),57 .resources = cht_wc_pwrsrc_resources,58 }, {59 .name = "cht_wcove_ext_chgr",60 .num_resources = ARRAY_SIZE(cht_wc_ext_charger_resources),61 .resources = cht_wc_ext_charger_resources,62 },63 { .name = "cht_wcove_region", },64 { .name = "cht_wcove_leds", },65};66 67/*68 * The CHT Whiskey Cove covers multiple I2C addresses, with a 1 Byte69 * register address space per I2C address, so we use 16 bit register70 * addresses where the high 8 bits contain the I2C client address.71 */72static int cht_wc_byte_reg_read(void *context, unsigned int reg,73 unsigned int *val)74{75 struct i2c_client *client = context;76 int ret, orig_addr = client->addr;77 78 if (!(reg & REG_ADDR_MASK)) {79 dev_err(&client->dev, "Error I2C address not specified\n");80 return -EINVAL;81 }82 83 client->addr = (reg & REG_ADDR_MASK) >> REG_ADDR_SHIFT;84 ret = i2c_smbus_read_byte_data(client, reg & REG_OFFSET_MASK);85 client->addr = orig_addr;86 87 if (ret < 0)88 return ret;89 90 *val = ret;91 return 0;92}93 94static int cht_wc_byte_reg_write(void *context, unsigned int reg,95 unsigned int val)96{97 struct i2c_client *client = context;98 int ret, orig_addr = client->addr;99 100 if (!(reg & REG_ADDR_MASK)) {101 dev_err(&client->dev, "Error I2C address not specified\n");102 return -EINVAL;103 }104 105 client->addr = (reg & REG_ADDR_MASK) >> REG_ADDR_SHIFT;106 ret = i2c_smbus_write_byte_data(client, reg & REG_OFFSET_MASK, val);107 client->addr = orig_addr;108 109 return ret;110}111 112static const struct regmap_config cht_wc_regmap_cfg = {113 .reg_bits = 16,114 .val_bits = 8,115 .reg_write = cht_wc_byte_reg_write,116 .reg_read = cht_wc_byte_reg_read,117};118 119static const struct regmap_irq cht_wc_regmap_irqs[] = {120 REGMAP_IRQ_REG(CHT_WC_PWRSRC_IRQ, 0, BIT(CHT_WC_PWRSRC_IRQ)),121 REGMAP_IRQ_REG(CHT_WC_THRM_IRQ, 0, BIT(CHT_WC_THRM_IRQ)),122 REGMAP_IRQ_REG(CHT_WC_BCU_IRQ, 0, BIT(CHT_WC_BCU_IRQ)),123 REGMAP_IRQ_REG(CHT_WC_ADC_IRQ, 0, BIT(CHT_WC_ADC_IRQ)),124 REGMAP_IRQ_REG(CHT_WC_EXT_CHGR_IRQ, 0, BIT(CHT_WC_EXT_CHGR_IRQ)),125 REGMAP_IRQ_REG(CHT_WC_GPIO_IRQ, 0, BIT(CHT_WC_GPIO_IRQ)),126 REGMAP_IRQ_REG(CHT_WC_CRIT_IRQ, 0, BIT(CHT_WC_CRIT_IRQ)),127};128 129static const struct regmap_irq_chip cht_wc_regmap_irq_chip = {130 .name = "cht_wc_irq_chip",131 .status_base = CHT_WC_IRQLVL1,132 .mask_base = CHT_WC_IRQLVL1_MASK,133 .irqs = cht_wc_regmap_irqs,134 .num_irqs = ARRAY_SIZE(cht_wc_regmap_irqs),135 .num_regs = 1,136};137 138static const struct dmi_system_id cht_wc_model_dmi_ids[] = {139 {140 /* GPD win / GPD pocket mini laptops */141 .driver_data = (void *)(long)INTEL_CHT_WC_GPD_WIN_POCKET,142 /*143 * This DMI match may not seem unique, but it is. In the 67000+144 * DMI decode dumps from linux-hardware.org only 116 have145 * board_vendor set to "AMI Corporation" and of those 116 only146 * the GPD win's and pocket's board_name is "Default string".147 */148 .matches = {149 DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),150 DMI_EXACT_MATCH(DMI_BOARD_NAME, "Default string"),151 DMI_EXACT_MATCH(DMI_BOARD_SERIAL, "Default string"),152 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Default string"),153 },154 }, {155 /* Xiaomi Mi Pad 2 */156 .driver_data = (void *)(long)INTEL_CHT_WC_XIAOMI_MIPAD2,157 .matches = {158 DMI_MATCH(DMI_SYS_VENDOR, "Xiaomi Inc"),159 DMI_MATCH(DMI_PRODUCT_NAME, "Mipad2"),160 },161 }, {162 /* Lenovo Yoga Book X90F / X90L */163 .driver_data = (void *)(long)INTEL_CHT_WC_LENOVO_YOGABOOK1,164 .matches = {165 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Intel Corporation"),166 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "CHERRYVIEW D1 PLATFORM"),167 DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "YETI-11"),168 },169 }, {170 /* Lenovo Yoga Book X91F / X91L */171 .driver_data = (void *)(long)INTEL_CHT_WC_LENOVO_YOGABOOK1,172 .matches = {173 /* Non exact match to match F + L versions */174 DMI_MATCH(DMI_PRODUCT_NAME, "Lenovo YB1-X91"),175 },176 }, {177 /* Lenovo Yoga Tab 3 Pro YT3-X90F */178 .driver_data = (void *)(long)INTEL_CHT_WC_LENOVO_YT3_X90,179 .matches = {180 DMI_MATCH(DMI_SYS_VENDOR, "Intel Corporation"),181 DMI_MATCH(DMI_PRODUCT_VERSION, "Blade3-10A-001"),182 },183 },184 { }185};186 187static int cht_wc_probe(struct i2c_client *client)188{189 struct device *dev = &client->dev;190 const struct dmi_system_id *id;191 struct intel_soc_pmic *pmic;192 acpi_status status;193 unsigned long long hrv;194 int ret;195 196 status = acpi_evaluate_integer(ACPI_HANDLE(dev), "_HRV", NULL, &hrv);197 if (ACPI_FAILURE(status))198 return dev_err_probe(dev, -ENODEV, "Failed to get PMIC hardware revision\n");199 if (hrv != CHT_WC_HRV)200 return dev_err_probe(dev, -ENODEV, "Invalid PMIC hardware revision: %llu\n", hrv);201 202 if (client->irq < 0)203 return dev_err_probe(dev, -EINVAL, "Invalid IRQ\n");204 205 pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL);206 if (!pmic)207 return -ENOMEM;208 209 id = dmi_first_match(cht_wc_model_dmi_ids);210 if (id)211 pmic->cht_wc_model = (long)id->driver_data;212 213 pmic->irq = client->irq;214 pmic->dev = dev;215 i2c_set_clientdata(client, pmic);216 217 pmic->regmap = devm_regmap_init(dev, NULL, client, &cht_wc_regmap_cfg);218 if (IS_ERR(pmic->regmap))219 return PTR_ERR(pmic->regmap);220 221 ret = devm_regmap_add_irq_chip(dev, pmic->regmap, pmic->irq,222 IRQF_ONESHOT | IRQF_SHARED, 0,223 &cht_wc_regmap_irq_chip,224 &pmic->irq_chip_data);225 if (ret)226 return ret;227 228 return devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE,229 cht_wc_dev, ARRAY_SIZE(cht_wc_dev), NULL, 0,230 regmap_irq_get_domain(pmic->irq_chip_data));231}232 233static void cht_wc_shutdown(struct i2c_client *client)234{235 struct intel_soc_pmic *pmic = i2c_get_clientdata(client);236 237 disable_irq(pmic->irq);238}239 240static int cht_wc_suspend(struct device *dev)241{242 struct intel_soc_pmic *pmic = dev_get_drvdata(dev);243 244 disable_irq(pmic->irq);245 246 return 0;247}248 249static int cht_wc_resume(struct device *dev)250{251 struct intel_soc_pmic *pmic = dev_get_drvdata(dev);252 253 enable_irq(pmic->irq);254 255 return 0;256}257static DEFINE_SIMPLE_DEV_PM_OPS(cht_wc_pm_ops, cht_wc_suspend, cht_wc_resume);258 259static const struct i2c_device_id cht_wc_i2c_id[] = {260 { }261};262 263static const struct acpi_device_id cht_wc_acpi_ids[] = {264 { "INT34D3", },265 { }266};267 268static struct i2c_driver cht_wc_driver = {269 .driver = {270 .name = "CHT Whiskey Cove PMIC",271 .pm = pm_sleep_ptr(&cht_wc_pm_ops),272 .acpi_match_table = cht_wc_acpi_ids,273 },274 .probe = cht_wc_probe,275 .shutdown = cht_wc_shutdown,276 .id_table = cht_wc_i2c_id,277};278builtin_i2c_driver(cht_wc_driver);279