+#include <linux/acpi.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/intel_soc_pmic.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+
+/* PMIC device registers */
+#define REG_OFFSET_MASK GENMASK(7, 0)
+#define REG_ADDR_MASK GENMASK(15, 8)
+#define REG_ADDR_SHIFT 8
+
+#define CHT_WC_IRQLVL1 0x6e02
+#define CHT_WC_IRQLVL1_MASK 0x6e0e
+
+/* Whiskey Cove PMIC share same ACPI ID between different platforms */
+#define CHT_WC_HRV 3
+
+/* Level 1 IRQs (level 2 IRQs are handled in the child device drivers) */
+enum {
+ CHT_WC_PWRSRC_IRQ = 0,
+ CHT_WC_THRM_IRQ,
+ CHT_WC_BCU_IRQ,
+ CHT_WC_ADC_IRQ,
+ CHT_WC_EXT_CHGR_IRQ,
+ CHT_WC_GPIO_IRQ,
+ /* There is no irq 6 */
+ CHT_WC_CRIT_IRQ = 7,
+};
+
+static struct resource cht_wc_pwrsrc_resources[] = {
+ DEFINE_RES_IRQ(CHT_WC_PWRSRC_IRQ),
+};
+
+static struct resource cht_wc_ext_charger_resources[] = {
+ DEFINE_RES_IRQ(CHT_WC_EXT_CHGR_IRQ),
+};
+
+static struct mfd_cell cht_wc_dev[] = {
+ {
+ .name = "cht_wcove_pwrsrc",
+ .num_resources = ARRAY_SIZE(cht_wc_pwrsrc_resources),
+ .resources = cht_wc_pwrsrc_resources,
+ },
+ {
+ */
+static int cht_wc_byte_reg_read(void *context, unsigned int reg,
+ unsigned int *val)
+{
+ struct i2c_client *client = context;
+ int ret, orig_addr = client->addr;
+
+ if (!(reg & REG_ADDR_MASK)) {
+ dev_err(&client->dev, "Error i2c address not specified\n");
+ return -EINVAL;
+ }
+
+ client->addr = (reg & REG_ADDR_MASK) >> REG_ADDR_SHIFT;
+ ret = i2c_smbus_read_byte_data(client, reg & REG_OFFSET_MASK);
+ client->addr = orig_addr;
+
+ if (ret < 0)
+ return ret;
+
+ *val = ret;
+ return 0;
+}
+
+static int cht_wc_byte_reg_write(void *context, unsigned int reg,
+ unsigned int val)
+{
+ struct i2c_client *client = context;
+ int ret, orig_addr = client->addr;
+
+ if (!(reg & REG_ADDR_MASK)) {
+ dev_err(&client->dev, "Error i2c address not specified\n");
+ return -EINVAL;
+ }
+
+ client->addr = (reg & REG_ADDR_MASK) >> REG_ADDR_SHIFT;
+ ret = i2c_smbus_write_byte_data(client, reg & REG_OFFSET_MASK, val);
+ client->addr = orig_addr;
+
+ return ret;
+}
+
+static const struct regmap_config cht_wc_regmap_cfg = {
+ .reg_bits = 16,
+ .val_bits = 8,
+ .reg_write = cht_wc_byte_reg_write,
+ .reg_read = cht_wc_byte_reg_read,
+};
+
+static const struct regmap_irq cht_wc_regmap_irqs[] = {
+ REGMAP_IRQ_REG(CHT_WC_PWRSRC_IRQ, 0, BIT(CHT_WC_PWRSRC_IRQ)),
+ REGMAP_IRQ_REG(CHT_WC_THRM_IRQ, 0, BIT(CHT_WC_THRM_IRQ)),
+ REGMAP_IRQ_REG(CHT_WC_BCU_IRQ, 0, BIT(CHT_WC_BCU_IRQ)),
+ REGMAP_IRQ_REG(CHT_WC_ADC_IRQ, 0, BIT(CHT_WC_ADC_IRQ)),
+ REGMAP_IRQ_REG(CHT_WC_EXT_CHGR_IRQ, 0, BIT(CHT_WC_EXT_CHGR_IRQ)),
+ REGMAP_IRQ_REG(CHT_WC_GPIO_IRQ, 0, BIT(CHT_WC_GPIO_IRQ)),
+ REGMAP_IRQ_REG(CHT_WC_CRIT_IRQ, 0, BIT(CHT_WC_CRIT_IRQ)),
+};
+
+static const struct regmap_irq_chip cht_wc_regmap_irq_chip = {
+ .name = "cht_wc_irq_chip",
+ .status_base = CHT_WC_IRQLVL1,
+ .mask_base = CHT_WC_IRQLVL1_MASK,
+ .irqs = cht_wc_regmap_irqs,
+ .num_irqs = ARRAY_SIZE(cht_wc_regmap_irqs),
+ .num_regs = 1,
+};
+
+static int cht_wc_probe(struct i2c_client *client,
+ const struct i2c_device_id *i2c_id)
+{
+ struct device *dev = &client->dev;
+ struct intel_soc_pmic *pmic;
+ acpi_status status;
+ unsigned long long hrv;
+ int ret;
+
+ status = acpi_evaluate_integer(ACPI_HANDLE(dev), "_HRV", NULL, &hrv);
+ if (ACPI_FAILURE(status)) {
+ dev_err(dev, "Failed to get PMIC hardware revision\n");
+ return -ENODEV;
+ }
+ if (hrv != CHT_WC_HRV) {
+ dev_err(dev, "Invalid PMIC hardware revision: %llu\n", hrv);
+ return -ENODEV;
+ }
+ if (client->irq < 0) {
+ dev_err(dev, "Invalid IRQ\n");
+ return -ENODEV;
+ }
+
+ pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL);
+ if (!pmic)
+ return -ENOMEM;
+
+ pmic->irq = client->irq;
+ pmic->dev = dev;
+ i2c_set_clientdata(client, pmic);
+
+ pmic->regmap = devm_regmap_init(dev, NULL, client, &cht_wc_regmap_cfg);
+ if (IS_ERR(pmic->regmap))
+ return PTR_ERR(pmic->regmap);
+
+ ret = devm_regmap_add_irq_chip(dev, pmic->regmap, pmic->irq,
+ IRQF_ONESHOT | IRQF_SHARED, 0,
+ &cht_wc_regmap_irq_chip,
+ &pmic->irq_chip_data);
+ if (ret)
+ return ret;
+
+ return devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE,
+ cht_wc_dev, ARRAY_SIZE(cht_wc_dev), NULL, 0,
+ regmap_irq_get_domain(pmic->irq_chip_data));
+}
+
+static void cht_wc_shutdown(struct i2c_client *client)
+{
+ struct intel_soc_pmic *pmic = i2c_get_clientdata(client);
+
+ disable_irq(pmic->irq);
+}
+
+static int __maybe_unused cht_wc_suspend(struct device *dev)
+{
+ struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
+
+ disable_irq(pmic->irq);
+ return 0;
+}
+
+static int __maybe_unused cht_wc_resume(struct device *dev)
+{
+ struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
+
+ enable_irq(pmic->irq);
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(cht_wc_pm_ops, cht_wc_suspend, cht_wc_resume);
+
+static const struct i2c_device_id cht_wc_i2c_id[] = {
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, cht_wc_i2c_id);
+
+static const struct acpi_device_id cht_wc_acpi_ids[] = {
+ { "INT34D3", },
+ { }
+};
+MODULE_DEVICE_TABLE(acpi, cht_wc_acpi_ids);
+
+static struct i2c_driver cht_wc_driver = {
+ .driver = {
+ .name = "CHT Whiskey Cove PMIC",
+ .pm = &cht_wc_pm_ops,
+ .acpi_match_table = ACPI_PTR(cht_wc_acpi_ids),
+ },
+ .probe = cht_wc_probe,
+ .shutdown = cht_wc_shutdown,
+ .id_table = cht_wc_i2c_id,
+};
+
+module_i2c_driver(cht_wc_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Hans de Goede <hdegoede@xxxxxxxxxx>");
