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From:   Gene Chen <gene.chen.richtek@gmail.com>
To:     sre@kernel.org, matthias.bgg@gmail.com, robh+dt@kernel.org
Cc:     linux-pm@vger.kernel.org, devicetree@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org,
        linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org,
        gene_chen@richtek.com, Wilma.Wu@mediatek.com,
        shufan_lee@richtek.com, cy_huang@richtek.com,
        benjamin.chao@mediatek.com
Subject: [PATCH v2 2/2] power: supply: mt6360_charger: add MT6360 charger support
Date:   Tue,  3 Nov 2020 18:41:31 +0800
Message-Id: <1604400091-14618-3-git-send-email-gene.chen.richtek@gmail.com>
In-Reply-To: <1604400091-14618-1-git-send-email-gene.chen.richtek@gmail.com>
References: <1604400091-14618-1-git-send-email-gene.chen.richtek@gmail.com>
Precedence: bulk

From: Gene Chen <gene_chen@richtek.com>

Add basic support for the battery charger for MT6360 PMIC

Signed-off-by: Gene Chen <gene_chen@richtek.com>
---
 drivers/power/supply/Kconfig          |   10 +
 drivers/power/supply/Makefile         |    1 +
 drivers/power/supply/mt6360_charger.c | 1022 +++++++++++++++++++++++++++++++++
 3 files changed, 1033 insertions(+)
 create mode 100644 drivers/power/supply/mt6360_charger.c

diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig
index faf2830..e2d53a3 100644
--- a/drivers/power/supply/Kconfig
+++ b/drivers/power/supply/Kconfig
@@ -562,6 +562,16 @@ config CHARGER_MP2629
 	  Battery charger. This driver provides Battery charger power management
 	  functions on the systems.
 
+config CHARGER_MT6360
+	tristate "Mediatek MT6360 Charger Driver"
+	depends on MFD_MT6360
+	depends on REGULATOR
+	help
+	  Say Y here to enable MT6360 Charger Part.
+	  The device supports High-Accuracy Voltage/Current Regulation,
+	  Average Input Current Regulation, Battery Tempature Sensing,
+	  Over-Temperature Protection, DPDM Detection for BC1.2
+
 config CHARGER_QCOM_SMBB
 	tristate "Qualcomm Switch-Mode Battery Charger and Boost"
 	depends on MFD_SPMI_PMIC || COMPILE_TEST
diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile
index b3c694a..9abecb9c 100644
--- a/drivers/power/supply/Makefile
+++ b/drivers/power/supply/Makefile
@@ -77,6 +77,7 @@ obj-$(CONFIG_CHARGER_MAX77693)	+= max77693_charger.o
 obj-$(CONFIG_CHARGER_MAX8997)	+= max8997_charger.o
 obj-$(CONFIG_CHARGER_MAX8998)	+= max8998_charger.o
 obj-$(CONFIG_CHARGER_MP2629)	+= mp2629_charger.o
+obj-$(CONFIG_CHARGER_MT6360)	+= mt6360_charger.o
 obj-$(CONFIG_CHARGER_QCOM_SMBB)	+= qcom_smbb.o
 obj-$(CONFIG_CHARGER_BQ2415X)	+= bq2415x_charger.o
 obj-$(CONFIG_CHARGER_BQ24190)	+= bq24190_charger.o
diff --git a/drivers/power/supply/mt6360_charger.c b/drivers/power/supply/mt6360_charger.c
new file mode 100644
index 0000000..5631875
--- /dev/null
+++ b/drivers/power/supply/mt6360_charger.c
@@ -0,0 +1,1022 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2019 MediaTek Inc.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/regmap.h>
+#include <linux/platform_device.h>
+#include <linux/of.h>
+#include <linux/interrupt.h>
+#include <linux/power_supply.h>
+#include <linux/regulator/driver.h>
+
+#define MT6360_PMU_CHG_CTRL1	0x311
+#define MT6360_PMU_CHG_CTRL2	0x312
+#define MT6360_PMU_CHG_CTRL3	0x313
+#define MT6360_PMU_CHG_CTRL4	0x314
+#define MT6360_PMU_CHG_CTRL5	0x315
+#define MT6360_PMU_CHG_CTRL6	0x316
+#define MT6360_PMU_CHG_CTRL7	0x317
+#define MT6360_PMU_CHG_CTRL8	0x318
+#define MT6360_PMU_CHG_CTRL9	0x319
+#define MT6360_PMU_CHG_CTRL10	0x31A
+#define MT6360_PMU_CHG_CTRL11	0x31B
+#define MT6360_PMU_CHG_CTRL12	0x31C
+#define MT6360_PMU_CHG_CTRL13	0x31D
+#define MT6360_PMU_DEVICE_TYPE	0x322
+#define MT6360_PMU_USB_STATUS1	0x327
+#define MT6360_PMU_CHG_CTRL17	0x32B
+#define MT6360_PMU_CHG_CTRL18	0x32C
+#define MT6360_PMU_CHG_STAT	0x34A
+#define MT6360_PMU_CHG_CTRL19	0x361
+#define MT6360_PMU_FOD_STAT	0x3E7
+
+/* MT6360_PMU_CHG_CTRL1 */
+#define MT6360_FSLP_SHFT	(3)
+#define MT6360_FSLP_MASK	BIT(MT6360_FSLP_SHFT)
+#define MT6360_HIZ_SHFT		(2)
+#define MT6360_HIZ_MASK		BIT(MT6360_HIZ_SHFT)
+#define MT6360_OPA_MODE_SHFT	(0)
+#define MT6360_OPA_MODE_MASK	BIT(MT6360_OPA_MODE_SHFT)
+/* MT6360_PMU_CHG_CTRL2 */
+#define MT6360_TE_SHFT		(4)
+#define MT6360_TE_MASK		BIT(MT6360_TE_SHFT)
+#define MT6360_IINLMTSEL_SHFT	(2)
+#define MT6360_IINLMTSEL_MASK	GENMASK(3, 2)
+#define MT6360_CHG_EN_SHFT	(0)
+#define MT6360_CHG_EN_MASK	BIT(MT6360_CHG_EN_SHFT)
+/* MT6360_PMU_CHG_CTRL3 */
+#define MT6360_IAICR_SHFT	(2)
+#define MT6360_IAICR_MASK	GENMASK(7, 2)
+#define MT6360_ILIM_EN_MASK	BIT(0)
+/* MT6360_PMU_CHG_CTRL4 */
+#define MT6360_VOREG_SHFT	(1)
+#define MT6360_VOREG_MASK	GENMASK(7, 1)
+/* MT6360_PMU_CHG_CTRL5 */
+#define MT6360_VOBST_MASK	GENMASK(7, 2)
+/* MT6360_PMU_CHG_CTRL6 */
+#define MT6360_VMIVR_SHFT	(1)
+#define MT6360_VMIVR_MASK	GENMASK(7, 1)
+/* MT6360_PMU_CHG_CTRL7 */
+#define MT6360_ICHG_SHFT	(2)
+#define MT6360_ICHG_MASK	GENMASK(7, 2)
+/* MT6360_PMU_CHG_CTRL8 */
+#define MT6360_IPREC_SHFT	(0)
+#define MT6360_IPREC_MASK	GENMASK(3, 0)
+/* MT6360_PMU_CHG_CTRL9 */
+#define MT6360_IEOC_SHFT	(4)
+#define MT6360_IEOC_MASK	GENMASK(7, 4)
+/* MT6360_PMU_CHG_CTRL10 */
+#define MT6360_LBP_SHFT		(4)
+#define MT6360_LBP_MASK		GENMASK(7, 4)
+#define MT6360_OTG_OC_SHFT	(0)
+#define MT6360_OTG_OC_MASK	GENMASK(3, 0)
+/* MT6360_PMU_CHG_CTRL11 */
+#define MT6360_SYSREG_SHFT	(2)
+#define MT6360_SYSREG_MASK	GENMASK(4, 2)
+#define MT6360_VREC_SHFT	(0)
+#define MT6360_VREC_MASK	GENMASK(2, 0)
+/* MT6360_PMU_CHG_CTRL12 */
+#define MT6360_WT_FC_SHFT	(5)
+#define MT6360_WT_FC_MASK	GENMASK(7, 5)
+/* MT6360_PMU_CHG_CTRL13 */
+#define MT6360_CHG_WDT_EN_SHFT	(7)
+#define MT6360_CHG_WDT_EN_MASK	BIT(MT6360_CHG_WDT_EN_SHFT)
+#define MT6360_CHG_WDT_SHFT	(4)
+#define MT6360_CHG_WDT_MASK	GENMASK(5, 4)
+/* MT6360_PMU_DEVICE_TYPE */
+#define MT6360_USBCHGEN_SHFT	(7)
+#define MT6360_USBCHGEN_MASK	BIT(MT6360_USBCHGEN_SHFT)
+/* MT6360_PMU_USB_STATUS1 */
+#define MT6360_USB_STATUS_SHFT	(4)
+#define MT6360_USB_STATUS_MASK	GENMASK(6, 4)
+/* MT6360_PMU_CHG_CTRL18 */
+#define MT6360_BAT_COMP_SHFT	(3)
+#define MT6360_BAT_COMP_MASK	GENMASK(5, 3)
+#define MT6360_VCLAMP_SHFT	(0)
+#define MT6360_VCLAMP_MASK	GENMASK(2, 0)
+/* MT6360_PMU_CHG_STAT */
+#define MT6360_CHG_STAT_SHFT	(6)
+#define MT6360_CHG_STAT_MASK	GENMASK(7, 6)
+#define MT6360_VBAT_LVL_MASK	BIT(5)
+/* MT6360_PMU_CHG_CTRL19 */
+#define MT6360_VINOVP_SHFT	(5)
+#define MT6360_VINOVP_MASK	GENMASK(6, 5)
+/* MT6360_PMU_FOD_STAT */
+#define MT6360_CHRDET_EXT_SHFT	(4)
+#define MT6360_CHRDET_EXT_MASK	BIT(4)
+
+/* uA */
+#define MT6360_ICHG_MIN		100000
+#define MT6360_ICHG_MAX		5000000
+#define MT6360_ICHG_STEP	100000
+/* uV */
+#define MT6360_VOREG_MIN	3900000
+#define MT6360_VOREG_MAX	4710000
+#define MT6360_VOREG_STEP	10000
+/* uA */
+#define MT6360_AICR_MIN		100000
+#define MT6360_AICR_MAX		3250000
+#define MT6360_AICR_STEP	50000
+/* uA */
+#define MT6360_IPREC_MIN	100000
+#define MT6360_IPREC_MAX	850000
+#define MT6360_IPREC_STEP	50000
+/* uA */
+#define MT6360_IEOC_MIN		100000
+#define MT6360_IEOC_MAX		850000
+#define MT6360_IEOC_STEP	50000
+
+struct mt6360_chg_platform_data {
+	u32 vinovp;
+};
+
+struct mt6360_chg_info {
+	struct device *dev;
+	struct mt6360_chg_platform_data *pdata;
+	struct regmap *regmap;
+	struct power_supply_desc psy_desc;
+	struct power_supply *psy;
+	struct regulator_dev *otg_rdev;
+	struct mutex chgdet_lock;
+	bool pwr_rdy;
+	bool bc12_en;
+	int psy_usb_type;
+	struct work_struct chrdet_work;
+};
+
+static struct mt6360_chg_platform_data def_platform_data = {
+	.vinovp = 6500000,
+};
+
+enum mt6360_iinlmtsel {
+	MT6360_IINLMTSEL_AICR_3250 = 0,
+	MT6360_IINLMTSEL_CHG_TYPE,
+	MT6360_IINLMTSEL_AICR,
+	MT6360_IINLMTSEL_LOWER_LEVEL,
+};
+
+enum mt6360_pmu_chg_type {
+	MT6360_CHG_TYPE_NOVBUS = 0,
+	MT6360_CHG_TYPE_UNDER_GOING,
+	MT6360_CHG_TYPE_SDP,
+	MT6360_CHG_TYPE_SDPNSTD,
+	MT6360_CHG_TYPE_DCP,
+	MT6360_CHG_TYPE_CDP,
+	MT6360_CHG_TYPE_MAX,
+};
+
+static enum power_supply_usb_type mt6360_charger_usb_types[] = {
+	POWER_SUPPLY_USB_TYPE_UNKNOWN,
+	POWER_SUPPLY_USB_TYPE_SDP,
+	POWER_SUPPLY_USB_TYPE_DCP,
+	POWER_SUPPLY_USB_TYPE_CDP,
+	POWER_SUPPLY_USB_TYPE_C,
+	POWER_SUPPLY_USB_TYPE_PD,
+	POWER_SUPPLY_USB_TYPE_PD_DRP,
+	POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID
+};
+
+static unsigned int mt6360_trans_reg_sel(u32 data, u32 min_val, u32 step,
+						u32 max_sel)
+{
+	unsigned int target = 0;
+
+	if (data >= min_val)
+		target = (data - min_val) / step;
+	if (target > max_sel)
+		target = max_sel;
+	return target;
+}
+
+static int mt6360_get_chrdet_ext_stat(struct mt6360_chg_info *mci,
+					     bool *pwr_rdy)
+{
+	int ret;
+	unsigned int regval;
+
+	ret = regmap_read(mci->regmap, MT6360_PMU_FOD_STAT, &regval);
+	if (ret < 0)
+		return ret;
+	*pwr_rdy = (regval & MT6360_CHRDET_EXT_MASK) ? true : false;
+	return 0;
+}
+
+static int mt6360_charger_get_online(struct mt6360_chg_info *mci,
+				     union power_supply_propval *val)
+{
+	int ret;
+	bool pwr_rdy;
+
+	ret = mt6360_get_chrdet_ext_stat(mci, &pwr_rdy);
+	if (ret < 0)
+		return ret;
+	val->intval = pwr_rdy ? true : false;
+	return 0;
+}
+
+static int mt6360_charger_get_status(struct mt6360_chg_info *mci,
+				     union power_supply_propval *val)
+{
+	int status, ret;
+	unsigned int regval;
+	bool pwr_rdy;
+
+	ret = mt6360_get_chrdet_ext_stat(mci, &pwr_rdy);
+	if (ret < 0)
+		return ret;
+	if (!pwr_rdy) {
+		status = POWER_SUPPLY_STATUS_DISCHARGING;
+		goto out;
+	}
+
+	ret = regmap_read(mci->regmap, MT6360_PMU_CHG_STAT, &regval);
+	if (ret < 0)
+		return ret;
+	regval &= MT6360_CHG_STAT_MASK;
+	regval >>= MT6360_CHG_STAT_SHFT;
+	switch (regval) {
+	case 0x0:
+		status = POWER_SUPPLY_STATUS_NOT_CHARGING;
+		break;
+	case 0x1:
+		status = POWER_SUPPLY_STATUS_CHARGING;
+		break;
+	case 0x2:
+		status = POWER_SUPPLY_STATUS_FULL;
+		break;
+	default:
+		ret = -EIO;
+	}
+out:
+	if (!ret)
+		val->intval = status;
+	return ret;
+}
+
+static int mt6360_charger_get_charge_type(struct mt6360_chg_info *mci,
+					  union power_supply_propval *val)
+{
+	int type, ret;
+	unsigned int regval;
+	u8 chg_stat;
+
+	ret = regmap_read(mci->regmap, MT6360_PMU_CHG_STAT, &regval);
+	if (ret < 0)
+		return ret;
+
+	chg_stat = (regval & MT6360_CHG_STAT_MASK) >> MT6360_CHG_STAT_SHFT;
+	switch (chg_stat) {
+	case 0x01: /* Charge in Progress */
+		if (regval & MT6360_VBAT_LVL_MASK)
+			type = POWER_SUPPLY_CHARGE_TYPE_FAST;
+		else
+			type = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
+		break;
+	case 0x00: /* Not Charging */
+	case 0x02: /* Charge Done */
+	case 0x03: /* Charge Fault */
+	default:
+		type = POWER_SUPPLY_CHARGE_TYPE_NONE;
+		break;
+	}
+
+	val->intval = type;
+	return 0;
+}
+
+static int mt6360_charger_get_ichg(struct mt6360_chg_info *mci,
+				   union power_supply_propval *val)
+{
+	int ichg, ret;
+	unsigned int regval;
+
+	ret = regmap_read(mci->regmap, MT6360_PMU_CHG_CTRL7, &regval);
+	if (ret < 0)
+		return ret;
+	regval = (regval & MT6360_ICHG_MASK) >> MT6360_ICHG_SHFT;
+	ichg = MT6360_ICHG_MIN + (regval * MT6360_ICHG_STEP);
+	if (ichg > MT6360_ICHG_MAX)
+		ichg = MT6360_ICHG_MAX;
+	val->intval = ichg;
+	return 0;
+}
+
+static int mt6360_charger_get_max_ichg(struct mt6360_chg_info *mci,
+				       union power_supply_propval *val)
+{
+	val->intval = MT6360_ICHG_MAX;
+	return 0;
+}
+
+static int mt6360_charger_get_cv(struct mt6360_chg_info *mci,
+				 union power_supply_propval *val)
+{
+	int cv, ret;
+	unsigned int regval;
+
+	ret = regmap_read(mci->regmap, MT6360_PMU_CHG_CTRL4, &regval);
+	if (ret < 0)
+		return ret;
+	regval = (regval & MT6360_VOREG_MASK) >> MT6360_VOREG_SHFT;
+	cv = MT6360_VOREG_MIN + (regval * MT6360_VOREG_STEP);
+	if (cv > MT6360_VOREG_MAX)
+		cv = MT6360_VOREG_MAX;
+	val->intval = cv;
+	return 0;
+}
+
+static int mt6360_charger_get_max_cv(struct mt6360_chg_info *mci,
+				     union power_supply_propval *val)
+{
+	val->intval = MT6360_VOREG_MAX;
+	return 0;
+}
+
+static int mt6360_charger_get_aicr(struct mt6360_chg_info *mci,
+				   union power_supply_propval *val)
+{
+	int ret;
+	unsigned int regval;
+
+	ret = regmap_read(mci->regmap, MT6360_PMU_CHG_CTRL3, &regval);
+	if (ret < 0)
+		return ret;
+	regval = (regval & MT6360_IAICR_MASK) >> MT6360_IAICR_SHFT;
+	val->intval = MT6360_AICR_MIN + (regval * MT6360_AICR_STEP);
+	return 0;
+}
+
+static int mt6360_charger_get_iprechg(struct mt6360_chg_info *mci,
+				      union power_supply_propval *val)
+{
+	int ret;
+	unsigned int regval;
+
+	ret = regmap_read(mci->regmap, MT6360_PMU_CHG_CTRL8, &regval);
+	if (ret < 0)
+		return ret;
+	regval = (regval & MT6360_IPREC_MASK) >> MT6360_IPREC_SHFT;
+	val->intval = MT6360_IPREC_MIN + (regval * MT6360_IPREC_STEP);
+	return 0;
+}
+
+static int mt6360_charger_get_ieoc(struct mt6360_chg_info *mci,
+				   union power_supply_propval *val)
+{
+	int ret;
+	unsigned int regval;
+
+	ret = regmap_read(mci->regmap, MT6360_PMU_CHG_CTRL9, &regval);
+	if (ret < 0)
+		return ret;
+	regval = (regval & MT6360_IEOC_MASK) >> MT6360_IEOC_SHFT;
+	val->intval = MT6360_IEOC_MIN + (regval * MT6360_IEOC_STEP);
+	return 0;
+}
+
+static int mt6360_charger_set_online(struct mt6360_chg_info *mci,
+				     const union power_supply_propval *val)
+{
+	u8 force_sleep = val->intval ? 0 : 1;
+
+	return regmap_update_bits(mci->regmap, MT6360_PMU_CHG_CTRL1,
+				  MT6360_FSLP_MASK,
+				  force_sleep << MT6360_FSLP_SHFT);
+}
+
+static int mt6360_charger_set_ichg(struct mt6360_chg_info *mci,
+				   const union power_supply_propval *val)
+{
+	unsigned int regval;
+
+	regval = mt6360_trans_reg_sel(val->intval, 100000, 100000, 0x31);
+	return regmap_update_bits(mci->regmap, MT6360_PMU_CHG_CTRL7,
+				  MT6360_ICHG_MASK, regval << MT6360_ICHG_SHFT);
+}
+
+static int mt6360_charger_set_cv(struct mt6360_chg_info *mci,
+				 const union power_supply_propval *val)
+{
+	unsigned int regval;
+
+	regval = mt6360_trans_reg_sel(val->intval, 3900000, 10000, 0x51);
+	return regmap_update_bits(mci->regmap,
+				  MT6360_PMU_CHG_CTRL4,
+				  MT6360_VOREG_MASK,
+				  regval << MT6360_VOREG_SHFT);
+}
+
+static int mt6360_charger_set_aicr(struct mt6360_chg_info *mci,
+				   const union power_supply_propval *val)
+{
+	unsigned int regval;
+
+	regval = mt6360_trans_reg_sel(val->intval, 100000, 50000, 0x3F);
+	return regmap_update_bits(mci->regmap,
+				  MT6360_PMU_CHG_CTRL3,
+				  MT6360_IAICR_MASK,
+				  regval << MT6360_IAICR_SHFT);
+}
+
+static int mt6360_charger_set_iprechg(struct mt6360_chg_info *mci,
+				      const union power_supply_propval *val)
+{
+	unsigned int regval;
+
+	regval = mt6360_trans_reg_sel(val->intval, 100000, 50000, 0x0F);
+	return regmap_update_bits(mci->regmap,
+				  MT6360_PMU_CHG_CTRL8,
+				  MT6360_IPREC_MASK,
+				  regval << MT6360_IPREC_SHFT);
+}
+
+static int mt6360_charger_set_ieoc(struct mt6360_chg_info *mci,
+				   const union power_supply_propval *val)
+{
+	unsigned int regval;
+
+	regval = mt6360_trans_reg_sel(val->intval, 100000, 50000, 0x0F);
+	return regmap_update_bits(mci->regmap,
+				  MT6360_PMU_CHG_CTRL9,
+				  MT6360_IEOC_MASK,
+				  regval << MT6360_IEOC_SHFT);
+}
+
+static int mt6360_charger_get_property(struct power_supply *psy,
+				       enum power_supply_property psp,
+				       union power_supply_propval *val)
+{
+	struct mt6360_chg_info *mci = power_supply_get_drvdata(psy);
+	int ret = 0;
+
+	dev_dbg(mci->dev, "%s: prop = %d\n", __func__, psp);
+	switch (psp) {
+	case POWER_SUPPLY_PROP_ONLINE:
+		ret = mt6360_charger_get_online(mci, val);
+		break;
+	case POWER_SUPPLY_PROP_STATUS:
+		ret = mt6360_charger_get_status(mci, val);
+		break;
+	case POWER_SUPPLY_PROP_CHARGE_TYPE:
+		ret = mt6360_charger_get_charge_type(mci, val);
+		break;
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+		ret = mt6360_charger_get_ichg(mci, val);
+		break;
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
+		ret = mt6360_charger_get_max_ichg(mci, val);
+		break;
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+		ret = mt6360_charger_get_cv(mci, val);
+		break;
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
+		ret = mt6360_charger_get_max_cv(mci, val);
+		break;
+	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+		ret = mt6360_charger_get_aicr(mci, val);
+		break;
+	case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
+		ret = mt6360_charger_get_iprechg(mci, val);
+		break;
+	case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
+		ret = mt6360_charger_get_ieoc(mci, val);
+		break;
+	case POWER_SUPPLY_PROP_USB_TYPE:
+		val->intval = mci->psy_usb_type;
+		break;
+	default:
+		ret = -ENODATA;
+	}
+	return ret;
+}
+
+static int mt6360_charger_set_property(struct power_supply *psy,
+				       enum power_supply_property psp,
+				       const union power_supply_propval *val)
+{
+	struct mt6360_chg_info *mci = power_supply_get_drvdata(psy);
+	int ret;
+
+	dev_dbg(mci->dev, "%s: prop = %d\n", __func__, psp);
+	switch (psp) {
+	case POWER_SUPPLY_PROP_ONLINE:
+		ret = mt6360_charger_set_online(mci, val);
+		break;
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+		ret = mt6360_charger_set_ichg(mci, val);
+		break;
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+		ret = mt6360_charger_set_cv(mci, val);
+		break;
+	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+		ret = mt6360_charger_set_aicr(mci, val);
+		break;
+	case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
+		ret = mt6360_charger_set_iprechg(mci, val);
+		break;
+	case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
+		ret = mt6360_charger_set_ieoc(mci, val);
+		break;
+	default:
+		ret = -EINVAL;
+	}
+	return ret;
+}
+
+static int mt6360_charger_property_is_writeable(struct power_supply *psy,
+					       enum power_supply_property psp)
+{
+	switch (psp) {
+	case POWER_SUPPLY_PROP_ONLINE:
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+	case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
+	case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
+		return 1;
+	default:
+		return 0;
+	}
+}
+
+static enum power_supply_property mt6360_charger_properties[] = {
+	POWER_SUPPLY_PROP_ONLINE,
+	POWER_SUPPLY_PROP_STATUS,
+	POWER_SUPPLY_PROP_CHARGE_TYPE,
+	POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
+	POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
+	POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
+	POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
+	POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
+	POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
+	POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
+	POWER_SUPPLY_PROP_USB_TYPE,
+};
+
+static char *mt6360_charger_supplied_to[] = {
+	"main-battery"
+};
+
+static const struct power_supply_desc mt6360_charger_desc = {
+	.type			= POWER_SUPPLY_TYPE_USB,
+	.properties		= mt6360_charger_properties,
+	.num_properties		= ARRAY_SIZE(mt6360_charger_properties),
+	.get_property		= mt6360_charger_get_property,
+	.set_property		= mt6360_charger_set_property,
+	.property_is_writeable	= mt6360_charger_property_is_writeable,
+	.usb_types		= mt6360_charger_usb_types,
+	.num_usb_types		= ARRAY_SIZE(mt6360_charger_usb_types),
+};
+
+static const struct regulator_ops mt6360_chg_otg_ops = {
+	.list_voltage = regulator_list_voltage_linear,
+	.enable = regulator_enable_regmap,
+	.disable = regulator_disable_regmap,
+	.is_enabled = regulator_is_enabled_regmap,
+	.set_voltage_sel = regulator_set_voltage_sel_regmap,
+	.get_voltage_sel = regulator_get_voltage_sel_regmap,
+};
+
+static const struct regulator_desc mt6360_otg_rdesc = {
+	.of_match = "usb-otg-vbus",
+	.name = "usb-otg-vbus",
+	.ops = &mt6360_chg_otg_ops,
+	.owner = THIS_MODULE,
+	.type = REGULATOR_VOLTAGE,
+	.min_uV = 4425000,
+	.uV_step = 25000, /* step  25mV */
+	.n_voltages = 57, /* 4425mV to 5825mV */
+	.vsel_reg = MT6360_PMU_CHG_CTRL5,
+	.vsel_mask = MT6360_VOBST_MASK,
+	.enable_reg = MT6360_PMU_CHG_CTRL1,
+	.enable_mask = MT6360_OPA_MODE_MASK,
+};
+
+static irqreturn_t mt6360_pmu_attach_i_handler(int irq, void *data)
+{
+	struct mt6360_chg_info *mci = data;
+	int ret;
+	unsigned int usb_status;
+	int last_usb_type;
+
+	dev_dbg(mci->dev, "%s\n", __func__);
+	mutex_lock(&mci->chgdet_lock);
+	if (!mci->bc12_en) {
+		dev_info(mci->dev, "%s: bc12 disabled, ignore irq\n", __func__);
+		goto out;
+	}
+	last_usb_type = mci->psy_usb_type;
+	/* Plug in */
+	ret = regmap_read(mci->regmap, MT6360_PMU_USB_STATUS1, &usb_status);
+	if (ret < 0)
+		goto out;
+	usb_status &= MT6360_USB_STATUS_MASK;
+	usb_status >>= MT6360_USB_STATUS_SHFT;
+	switch (usb_status) {
+	case MT6360_CHG_TYPE_UNDER_GOING:
+		dev_info(mci->dev, "%s: under going...\n", __func__);
+		goto out;
+	case MT6360_CHG_TYPE_SDP:
+		mci->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP;
+		break;
+	case MT6360_CHG_TYPE_SDPNSTD:
+		mci->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP;
+		break;
+	case MT6360_CHG_TYPE_CDP:
+		mci->psy_usb_type = POWER_SUPPLY_USB_TYPE_CDP;
+		break;
+	case MT6360_CHG_TYPE_DCP:
+		mci->psy_usb_type = POWER_SUPPLY_USB_TYPE_DCP;
+		break;
+	default:
+		dev_warn(mci->dev,
+			 "%s: disconnect or unknown status\n", __func__);
+		goto out;
+	}
+
+	dev_info(mci->dev, "%s: chg_type = %d\n", __func__, mci->psy_usb_type);
+	if (last_usb_type != mci->psy_usb_type)
+		power_supply_changed(mci->psy);
+out:
+	mutex_unlock(&mci->chgdet_lock);
+	return IRQ_HANDLED;
+}
+
+static void mt6360_handle_chrdet_ext_evt(struct mt6360_chg_info *mci)
+{
+	int ret;
+	bool pwr_rdy;
+	int last_usb_type;
+
+	mutex_lock(&mci->chgdet_lock);
+	ret = mt6360_get_chrdet_ext_stat(mci, &pwr_rdy);
+	if (ret < 0)
+		goto out;
+	if (mci->pwr_rdy == pwr_rdy) {
+		dev_info(mci->dev,
+			 "%s: pwr_rdy is same(%d)\n", __func__, pwr_rdy);
+		goto out;
+	}
+	mci->pwr_rdy = pwr_rdy;
+	last_usb_type = mci->psy_usb_type;
+	dev_info(mci->dev, "%s: pwr_rdy = %d\n", __func__, pwr_rdy);
+	if (!pwr_rdy) {
+		mci->psy_usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
+		if (last_usb_type != mci->psy_usb_type)
+			power_supply_changed(mci->psy);
+
+	}
+	ret = regmap_update_bits(mci->regmap,
+				 MT6360_PMU_DEVICE_TYPE,
+				 MT6360_USBCHGEN_MASK,
+				 pwr_rdy ? MT6360_USBCHGEN_MASK : 0);
+	if (ret < 0)
+		goto out;
+	mci->bc12_en = pwr_rdy;
+out:
+	mutex_unlock(&mci->chgdet_lock);
+}
+
+static void mt6360_chrdet_work(struct work_struct *work)
+{
+	struct mt6360_chg_info *mci = (struct mt6360_chg_info *)container_of(
+				     work, struct mt6360_chg_info, chrdet_work);
+
+	dev_info(mci->dev, "%s\n", __func__);
+	mt6360_handle_chrdet_ext_evt(mci);
+}
+
+static irqreturn_t mt6360_pmu_chrdet_ext_evt_handler(int irq, void *data)
+{
+	struct mt6360_chg_info *mci = data;
+
+	dev_info(mci->dev, "%s\n", __func__);
+	mt6360_handle_chrdet_ext_evt(mci);
+	return IRQ_HANDLED;
+}
+
+static int mt6360_chg_irq_register(struct platform_device *pdev)
+{
+	const struct {
+		const char *name;
+		irq_handler_t handler;
+	} irq_descs[] = {
+		{ "attach_i", mt6360_pmu_attach_i_handler },
+		{ "chrdet_ext_evt", mt6360_pmu_chrdet_ext_evt_handler }
+	};
+	int i, ret;
+
+	for (i = 0; i < ARRAY_SIZE(irq_descs); i++) {
+		ret = platform_get_irq_byname(pdev, irq_descs[i].name);
+		if (ret < 0)
+			return ret;
+
+		ret = devm_request_threaded_irq(&pdev->dev, ret, NULL,
+						irq_descs[i].handler,
+						IRQF_TRIGGER_FALLING,
+						irq_descs[i].name,
+						platform_get_drvdata(pdev));
+		if (ret < 0) {
+			dev_err(&pdev->dev,
+				"request %s irq fail\n", irq_descs[i].name);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+struct mt6360_field_info {
+	struct device_attribute dev_attr;
+	u16 reg;
+	u8 mask;
+	u8 shft;
+};
+
+static ssize_t mt6360_sysfs_show(struct device *dev,
+		struct device_attribute *attr, char *buf);
+static ssize_t mt6360_sysfs_store(struct device *dev,
+		struct device_attribute *attr, const char *buf, size_t count);
+
+#define MT6360_FIELD_RW(_name, _reg, _nbit)			\
+{								\
+	.dev_attr = __ATTR(_name, 0664,				\
+		       mt6360_sysfs_show, mt6360_sysfs_store),	\
+	.reg	= MT6360_PMU_##_reg,				\
+	.mask	= MT6360_##_nbit##_MASK,				\
+	.shft	= MT6360_##_nbit##_SHFT,				\
+}
+
+#define MT6360_FIELD_RO(_name, _reg, _nbit)			\
+{								\
+	.dev_attr = __ATTR(_name, 0444,				\
+			mt6360_sysfs_show, NULL),		\
+	.reg	= MT6360_PMU_##_reg,				\
+	.mask	= MT6360_##_nbit##_MASK,			\
+	.shft	= MT6360_##_nbit##_SHFT,			\
+}
+
+static struct mt6360_field_info mt6360_field_tbl[] = {
+	MT6360_FIELD_RW(hiz,		CHG_CTRL1,	HIZ),
+	MT6360_FIELD_RW(vmivr,		CHG_CTRL6,	VMIVR),
+	MT6360_FIELD_RW(iaicr,		CHG_CTRL3,	IAICR),
+	MT6360_FIELD_RW(SYSREG,		CHG_CTRL11,	SYSREG),
+	MT6360_FIELD_RW(otg_oc,		CHG_CTRL10,	OTG_OC),
+	MT6360_FIELD_RW(ichg,		CHG_CTRL17,	ICHG),
+	MT6360_FIELD_RW(iprec,		CHG_CTRL8,	IPREC),
+	MT6360_FIELD_RW(ieoc,		CHG_CTRL9,	IEOC),
+	MT6360_FIELD_RW(voreg,		CHG_CTRL4,	VOREG),
+	MT6360_FIELD_RW(lbp,		CHG_CTRL10,	LBP),
+	MT6360_FIELD_RW(vrec,		CHG_CTRL11,	VREC),
+	MT6360_FIELD_RW(te,		CHG_CTRL2,	TE),
+	MT6360_FIELD_RW(chg_wdt_en,	CHG_CTRL13,	CHG_WDT_EN),
+	MT6360_FIELD_RW(chg_wdt,	CHG_CTRL13,	CHG_WDT),
+	MT6360_FIELD_RW(wt_fc,		CHG_CTRL12,	WT_FC),
+	MT6360_FIELD_RW(bat_comp,	CHG_CTRL18,	BAT_COMP),
+	MT6360_FIELD_RW(vclamp,		CHG_CTRL18,	VCLAMP),
+	MT6360_FIELD_RW(usbchgen,	DEVICE_TYPE,	USBCHGEN),
+	MT6360_FIELD_RW(chg_en,		CHG_CTRL2,	CHG_EN),
+	MT6360_FIELD_RO(chrdet_ext,	FOD_STAT,	CHRDET_EXT),
+};
+
+static struct attribute *mt6360_attrs[ARRAY_SIZE(mt6360_field_tbl) + 1];
+
+static const struct attribute_group mt6360_attr_group = {
+	.attrs = mt6360_attrs,
+};
+
+static ssize_t mt6360_sysfs_show(struct device *dev,
+				 struct device_attribute *attr, char *buf)
+{
+	struct mt6360_chg_info *mci = dev_get_drvdata(dev->parent);
+	struct mt6360_field_info *info = (void *)attr;
+	unsigned int regval;
+	int ret;
+
+	ret = regmap_read(mci->regmap, info->reg, &regval);
+	if (ret < 0)
+		return ret;
+	regval = (regval & info->mask) >> info->shft;
+	return scnprintf(buf, PAGE_SIZE, "%02x\n", regval);
+}
+
+static ssize_t mt6360_sysfs_store(struct device *dev,
+		   struct device_attribute *attr, const char *buf, size_t count)
+{
+	struct mt6360_chg_info *mci = dev_get_drvdata(dev->parent);
+	struct mt6360_field_info *info = (void *)attr;
+	int ret, tmp;
+
+	if (kstrtoint(buf, 10, &tmp) < 0) {
+		dev_err(dev, "failed to parsing number\n");
+		return -EINVAL;
+	}
+	ret = regmap_update_bits(mci->regmap,
+				 info->reg, info->mask, tmp << info->shft);
+	if (ret < 0)
+		return ret;
+	return count;
+}
+
+static int mt6360_sysfs_create_group(struct mt6360_chg_info *mci)
+{
+	int i, tb_size = ARRAY_SIZE(mt6360_field_tbl);
+
+	for (i = 0; i < tb_size; i++)
+		mt6360_attrs[i] = &(mt6360_field_tbl[i].dev_attr.attr);
+	return devm_device_add_group(&mci->psy->dev, &mt6360_attr_group);
+}
+
+static int mt6360_chg_init_setting(struct mt6360_chg_info *mci)
+{
+	int ret;
+
+	/* Disable bc12 */
+	ret = regmap_update_bits(mci->regmap, MT6360_PMU_DEVICE_TYPE,
+				 MT6360_USBCHGEN_MASK, 0);
+	if (ret < 0) {
+		dev_err(mci->dev, "%s: disable bc12 fail\n", __func__);
+		goto out;
+	}
+	/* Set input current limit select by AICR */
+	ret = regmap_update_bits(mci->regmap, MT6360_PMU_CHG_CTRL2,
+				 MT6360_IINLMTSEL_MASK,
+				 MT6360_IINLMTSEL_AICR <<
+					MT6360_IINLMTSEL_SHFT);
+	if (ret < 0) {
+		dev_err(mci->dev,
+			"%s: switch iinlmtsel to aicr fail\n", __func__);
+		goto out;
+	}
+	usleep_range(5000, 6000);
+	/* Disable ilim */
+	ret = regmap_update_bits(mci->regmap, MT6360_PMU_CHG_CTRL3,
+				 MT6360_ILIM_EN_MASK, 0);
+	if (ret < 0) {
+		dev_err(mci->dev,
+			"%s: switch iinlmtsel to aicr fail\n", __func__);
+		goto out;
+	}
+	/* Enlarge OTG_OC to max 3A */
+	ret = regmap_update_bits(mci->regmap,
+				 MT6360_PMU_CHG_CTRL10, 0x07, 0x07);
+	if (ret < 0) {
+		dev_err(mci->dev,
+			"%s: faled config otg oc to maximum\n", __func__);
+	}
+out:
+	return ret;
+}
+
+static u32 mt6360_vinovp_trans_to_sel(u32 val)
+{
+	u32 vinovp_tbl[] = { 5500000, 6500000, 11000000, 14500000 };
+	int i;
+
+	/* Select the smaller and equal supported value */
+	for (i = 0; i < ARRAY_SIZE(vinovp_tbl)-1; i++) {
+		if (val < vinovp_tbl[i+1])
+			break;
+	}
+	return i;
+}
+
+static struct mt6360_chg_platform_data *mt6360_parse_pdata(
+						   struct platform_device *pdev)
+{
+	struct mt6360_chg_platform_data *pdata = dev_get_platdata(&pdev->dev);
+	struct device_node *np = pdev->dev.of_node;
+	int ret;
+
+	pdata = kmemdup(&def_platform_data, sizeof(*pdata), GFP_KERNEL);
+	ret = of_property_read_u32(np, "richtek,vinovp-microvolt", &pdata->vinovp);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to parse vinovp in DT\n");
+		return ERR_PTR(ret);
+	}
+	return pdata;
+}
+
+static int mt6360_apply_pdata(struct platform_device *pdev)
+{
+	struct mt6360_chg_platform_data *pdata = dev_get_platdata(&pdev->dev);
+	struct mt6360_chg_info *mci = dev_get_drvdata(&pdev->dev);
+	int ret;
+	u32 sel;
+
+	sel = mt6360_vinovp_trans_to_sel(pdata->vinovp);
+	ret = regmap_update_bits(mci->regmap, MT6360_PMU_CHG_CTRL19,
+				 MT6360_VINOVP_MASK, sel << MT6360_VINOVP_SHFT);
+	if (ret)
+		return ret;
+	return 0;
+}
+
+static int mt6360_charger_probe(struct platform_device *pdev)
+{
+	struct mt6360_chg_platform_data *pdata = dev_get_platdata(&pdev->dev);
+	struct mt6360_chg_info *mci;
+	struct power_supply_config charger_cfg = {};
+	struct regulator_config config = { };
+	int ret;
+
+	mci = devm_kzalloc(&pdev->dev, sizeof(*mci), GFP_KERNEL);
+	if (!mci)
+		return -ENOMEM;
+
+	pdata = mt6360_parse_pdata(pdev);
+	if (IS_ERR_OR_NULL(pdata))
+		return PTR_ERR(pdata);
+
+	pdev->dev.platform_data = pdata;
+
+	mci->dev = &pdev->dev;
+	mutex_init(&mci->chgdet_lock);
+	platform_set_drvdata(pdev, mci);
+	INIT_WORK(&mci->chrdet_work, &mt6360_chrdet_work);
+
+	mci->regmap = dev_get_regmap(pdev->dev.parent, NULL);
+	if (!mci->regmap) {
+		dev_err(&pdev->dev, "Failed to get parent regmap\n");
+		return -ENODEV;
+	}
+
+	ret = mt6360_apply_pdata(pdev);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to apply pdata\n");
+		return ret;
+	}
+
+	memcpy(&mci->psy_desc, &mt6360_charger_desc, sizeof(mci->psy_desc));
+	mci->psy_desc.name = dev_name(&pdev->dev);
+	charger_cfg.drv_data = mci;
+	charger_cfg.of_node = pdev->dev.of_node;
+	charger_cfg.supplied_to = mt6360_charger_supplied_to;
+	charger_cfg.num_supplicants = ARRAY_SIZE(mt6360_charger_supplied_to);
+	mci->psy = devm_power_supply_register(&pdev->dev,
+					      &mci->psy_desc, &charger_cfg);
+	if (IS_ERR(mci->psy)) {
+		dev_err(&pdev->dev, "Failed to register power supply dev\n");
+		return PTR_ERR(mci->psy);
+	}
+
+	ret = mt6360_chg_init_setting(mci);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to initial setting\n");
+		return ret;
+	}
+
+	schedule_work(&mci->chrdet_work);
+
+	ret = mt6360_chg_irq_register(pdev);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to register irqs\n");
+		return ret;
+	}
+
+	config.dev = &pdev->dev;
+	config.regmap = mci->regmap;
+	mci->otg_rdev = devm_regulator_register(&pdev->dev, &mt6360_otg_rdesc,
+						&config);
+	if (IS_ERR(mci->otg_rdev))
+		return PTR_ERR(mci->otg_rdev);
+
+	ret = mt6360_sysfs_create_group(mci);
+	if (ret) {
+		dev_err(&pdev->dev,
+			"%s: create sysfs attrs fail\n", __func__);
+		return ret;
+	}
+
+	return 0;
+}
+
+static const struct of_device_id __maybe_unused mt6360_charger_of_id[] = {
+	{ .compatible = "mediatek,mt6360-chg", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, mt6360_charger_of_id);
+
+static const struct platform_device_id mt6360_charger_id[] = {
+	{ "mt6360-chg", 0 },
+	{},
+};
+MODULE_DEVICE_TABLE(platform, mt6360_charger_id);
+
+static struct platform_driver mt6360_charger_driver = {
+	.driver = {
+		.name = "mt6360-chg",
+		.of_match_table = of_match_ptr(mt6360_charger_of_id),
+	},
+	.probe = mt6360_charger_probe,
+	.id_table = mt6360_charger_id,
+};
+module_platform_driver(mt6360_charger_driver);
+
+MODULE_AUTHOR("CY_Huang <cy_huang@richtek.com>");
+MODULE_DESCRIPTION("MT6360 Charger Driver");
+MODULE_LICENSE("GPL");
-- 
2.7.4