1 // SPDX-License-Identifier: GPL-2.0
3 * MFD core driver for Intel Cherrytrail Whiskey Cove PMIC
5 * Copyright (C) 2017 Hans de Goede <hdegoede@redhat.com>
7 * Based on various non upstream patches to support the CHT Whiskey Cove PMIC:
8 * Copyright (C) 2013-2015 Intel Corporation. All rights reserved.
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>
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 8
27 #define CHT_WC_IRQLVL1 0x6e02
28 #define CHT_WC_IRQLVL1_MASK 0x6e0e
30 /* Whiskey Cove PMIC share same ACPI ID between different platforms */
33 /* Level 1 IRQs (level 2 IRQs are handled in the child device drivers) */
35 CHT_WC_PWRSRC_IRQ = 0,
41 /* There is no irq 6 */
45 static const struct resource cht_wc_pwrsrc_resources[] = {
46 DEFINE_RES_IRQ(CHT_WC_PWRSRC_IRQ),
49 static const struct resource cht_wc_ext_charger_resources[] = {
50 DEFINE_RES_IRQ(CHT_WC_EXT_CHGR_IRQ),
53 static struct mfd_cell cht_wc_dev[] = {
55 .name = "cht_wcove_pwrsrc",
56 .num_resources = ARRAY_SIZE(cht_wc_pwrsrc_resources),
57 .resources = cht_wc_pwrsrc_resources,
59 .name = "cht_wcove_ext_chgr",
60 .num_resources = ARRAY_SIZE(cht_wc_ext_charger_resources),
61 .resources = cht_wc_ext_charger_resources,
63 { .name = "cht_wcove_region", },
64 { .name = "cht_wcove_leds", },
68 * The CHT Whiskey Cove covers multiple I2C addresses, with a 1 Byte
69 * register address space per I2C address, so we use 16 bit register
70 * addresses where the high 8 bits contain the I2C client address.
72 static int cht_wc_byte_reg_read(void *context, unsigned int reg,
75 struct i2c_client *client = context;
76 int ret, orig_addr = client->addr;
78 if (!(reg & REG_ADDR_MASK)) {
79 dev_err(&client->dev, "Error I2C address not specified\n");
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;
94 static int cht_wc_byte_reg_write(void *context, unsigned int reg,
97 struct i2c_client *client = context;
98 int ret, orig_addr = client->addr;
100 if (!(reg & REG_ADDR_MASK)) {
101 dev_err(&client->dev, "Error I2C address not specified\n");
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;
112 static const struct regmap_config cht_wc_regmap_cfg = {
115 .reg_write = cht_wc_byte_reg_write,
116 .reg_read = cht_wc_byte_reg_read,
119 static 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)),
129 static 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),
138 static const struct dmi_system_id cht_wc_model_dmi_ids[] = {
140 /* GPD win / GPD pocket mini laptops */
141 .driver_data = (void *)(long)INTEL_CHT_WC_GPD_WIN_POCKET,
143 * This DMI match may not seem unique, but it is. In the 67000+
144 * DMI decode dumps from linux-hardware.org only 116 have
145 * board_vendor set to "AMI Corporation" and of those 116 only
146 * the GPD win's and pocket's board_name is "Default string".
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"),
155 /* Xiaomi Mi Pad 2 */
156 .driver_data = (void *)(long)INTEL_CHT_WC_XIAOMI_MIPAD2,
158 DMI_MATCH(DMI_SYS_VENDOR, "Xiaomi Inc"),
159 DMI_MATCH(DMI_PRODUCT_NAME, "Mipad2"),
162 /* Lenovo Yoga Book X90F / X91F / X91L */
163 .driver_data = (void *)(long)INTEL_CHT_WC_LENOVO_YOGABOOK1,
165 /* Non exact match to match all versions */
166 DMI_MATCH(DMI_PRODUCT_NAME, "Lenovo YB1-X9"),
172 static int cht_wc_probe(struct i2c_client *client)
174 struct device *dev = &client->dev;
175 const struct dmi_system_id *id;
176 struct intel_soc_pmic *pmic;
178 unsigned long long hrv;
181 status = acpi_evaluate_integer(ACPI_HANDLE(dev), "_HRV", NULL, &hrv);
182 if (ACPI_FAILURE(status)) {
183 dev_err(dev, "Failed to get PMIC hardware revision\n");
186 if (hrv != CHT_WC_HRV) {
187 dev_err(dev, "Invalid PMIC hardware revision: %llu\n", hrv);
190 if (client->irq < 0) {
191 dev_err(dev, "Invalid IRQ\n");
195 pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL);
199 id = dmi_first_match(cht_wc_model_dmi_ids);
201 pmic->cht_wc_model = (long)id->driver_data;
203 pmic->irq = client->irq;
205 i2c_set_clientdata(client, pmic);
207 pmic->regmap = devm_regmap_init(dev, NULL, client, &cht_wc_regmap_cfg);
208 if (IS_ERR(pmic->regmap))
209 return PTR_ERR(pmic->regmap);
211 ret = devm_regmap_add_irq_chip(dev, pmic->regmap, pmic->irq,
212 IRQF_ONESHOT | IRQF_SHARED, 0,
213 &cht_wc_regmap_irq_chip,
214 &pmic->irq_chip_data);
218 return devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE,
219 cht_wc_dev, ARRAY_SIZE(cht_wc_dev), NULL, 0,
220 regmap_irq_get_domain(pmic->irq_chip_data));
223 static void cht_wc_shutdown(struct i2c_client *client)
225 struct intel_soc_pmic *pmic = i2c_get_clientdata(client);
227 disable_irq(pmic->irq);
230 static int __maybe_unused cht_wc_suspend(struct device *dev)
232 struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
234 disable_irq(pmic->irq);
239 static int __maybe_unused cht_wc_resume(struct device *dev)
241 struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
243 enable_irq(pmic->irq);
247 static SIMPLE_DEV_PM_OPS(cht_wc_pm_ops, cht_wc_suspend, cht_wc_resume);
249 static const struct i2c_device_id cht_wc_i2c_id[] = {
253 static const struct acpi_device_id cht_wc_acpi_ids[] = {
258 static struct i2c_driver cht_wc_driver = {
260 .name = "CHT Whiskey Cove PMIC",
261 .pm = &cht_wc_pm_ops,
262 .acpi_match_table = cht_wc_acpi_ids,
264 .probe_new = cht_wc_probe,
265 .shutdown = cht_wc_shutdown,
266 .id_table = cht_wc_i2c_id,
268 builtin_i2c_driver(cht_wc_driver);