Based on the datasheet found here:
http://www.richtek.com/download_ds.jsp?p=RT9455
Signed-off-by: Anda-Maria Nicolae <anda-maria.nico...@intel.com>
---
.../devicetree/bindings/power/rt9455_charger.txt | 38 +
.../devicetree/bindings/vendor-prefixes.txt | 1 +
drivers/power/Kconfig | 6 +
drivers/power/Makefile | 1 +
drivers/power/rt9455_charger.c | 1770 ++++++++++++++++++++
5 files changed, 1816 insertions(+)
create mode 100644 Documentation/devicetree/bindings/power/rt9455_charger.txt
create mode 100644 drivers/power/rt9455_charger.c
diff --git a/Documentation/devicetree/bindings/power/rt9455_charger.txt
b/Documentation/devicetree/bindings/power/rt9455_charger.txt
new file mode 100644
index 0000000..f716cf6
--- /dev/null
+++ b/Documentation/devicetree/bindings/power/rt9455_charger.txt
@@ -0,0 +1,38 @@
+Binding for RT rt9455 battery charger
+
+Required properties:
+- compatible: Should contain one of the following:
+ * "rt,rt9455"
+
+- reg: integer, i2c address of the device.
+- rt,ICHRG: integer, output charge current in uA.
+- rt,IEOC_PERCENTAGE: integer, the percent of the output charge current
(ICHRG).
+ When the current in constant-voltage phase drops below
+ ICHRG x IEOC_PERCENTAGE, charge is terminated.
+- rt,VOREG: integer, battery regulation voltage in uV.
+
+Optional properties:
+- rt,VMIVR: integer, minimum input voltage regulation in uV.
+ Prevents input voltage drop due to insufficient current
+ provided by the power source.
+- rt,IAICR: integer, input current regulation in uA.
+
+Example:
+
+rt9455@22 {
+ compatible = "rt,rt9455";
+ reg = <0x22>;
+
+ interrupt-parent = <&gpio1>;
+ interrupts = <0 1>;
+
+ interrupt-gpio = <&gpio1 0 1>;
+ reset-gpio = <&gpio1 1 1>;
+
+ rt,ICHRG = <500000>;
+ rt,IEOC_PERCENTAGE = <10>;
+ rt,VOREG = <4200000>;
+
+ rt,VMIVR = <4500000>;
+ rt,IAICR = <500000>;
+};
diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt
b/Documentation/devicetree/bindings/vendor-prefixes.txt
index 389ca13..dc868ed 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.txt
+++ b/Documentation/devicetree/bindings/vendor-prefixes.txt
@@ -148,6 +148,7 @@ raidsonic RaidSonic Technology GmbH
ralink Mediatek/Ralink Technology Corp.
ramtron Ramtron International
realtek Realtek Semiconductor Corp.
+rt Richtek Technology Corporation
renesas Renesas Electronics Corporation
ricoh Ricoh Co. Ltd.
rockchip Fuzhou Rockchip Electronics Co., Ltd
diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
index 4091fb0..39f208d 100644
--- a/drivers/power/Kconfig
+++ b/drivers/power/Kconfig
@@ -439,6 +439,12 @@ config BATTERY_RT5033
The fuelgauge calculates and determines the battery state of charge
according to battery open circuit voltage.
+config CHARGER_RT9455
+ tristate "Richtek RT9455 battery charger driver"
+ depends on I2C && GPIOLIB
+ help
+ Say Y to enable support for the Richtek RT9455 battery charger.
+
source "drivers/power/reset/Kconfig"
endif # POWER_SUPPLY
diff --git a/drivers/power/Makefile b/drivers/power/Makefile
index b7b0181..e49abbf 100644
--- a/drivers/power/Makefile
+++ b/drivers/power/Makefile
@@ -37,6 +37,7 @@ obj-$(CONFIG_BATTERY_MAX17040) += max17040_battery.o
obj-$(CONFIG_BATTERY_MAX17042) += max17042_battery.o
obj-$(CONFIG_BATTERY_Z2) += z2_battery.o
obj-$(CONFIG_BATTERY_RT5033) += rt5033_battery.o
+obj-$(CONFIG_CHARGER_RT9455) += rt9455_charger.o
obj-$(CONFIG_BATTERY_S3C_ADC) += s3c_adc_battery.o
obj-$(CONFIG_BATTERY_TWL4030_MADC) += twl4030_madc_battery.o
obj-$(CONFIG_CHARGER_88PM860X) += 88pm860x_charger.o
diff --git a/drivers/power/rt9455_charger.c b/drivers/power/rt9455_charger.c
new file mode 100644
index 0000000..57bb97d
--- /dev/null
+++ b/drivers/power/rt9455_charger.c
@@ -0,0 +1,1770 @@
+/*
+ * Driver for Richtek RT9455WSC battery charger.
+ *
+ * Copyright (C) 2015 Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/of_irq.h>
+#include <linux/of_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/power_supply.h>
+#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/acpi.h>
+#include <linux/usb/phy.h>
+
+#define RT9455_MANUFACTURER "Richtek"
+#define RT9455_MODEL_NAME "RT9455"
+#define RT9455_DRIVER_NAME "rt9455-charger"
+
+#define RT9455_IRQ_NAME "interrupt"
+
+#define RT9455_PWR_RDY_DELAY 1 /* 1 second */
+#define RT9455_MAX_CHARGING_TIME 21600 /* 6 hrs */
+#define RT9455_BATT_PRESENCE_DELAY 60 /* 60 seconds */
+
+#define RT9455_CHARGE_MODE 0x00
+#define RT9455_BOOST_MODE 0x01
+
+#define RT9455_FAULT 0x03
+
+#define RT9455_IAICR_100MA 0x00
+#define RT9455_IAICR_500MA 0x01
+#define RT9455_IAICR_NO_LIMIT 0x03
+
+#define RT9455_CHARGE_DISABLE 0x00
+#define RT9455_CHARGE_ENABLE 0x01
+
+#define RT9455_PWR_FAULT 0x00
+#define RT9455_PWR_GOOD 0x01
+
+#define RT9455_REG_CTRL1 0x00 /* Control1 */
+#define RT9455_REG_CTRL1_STAT_MASK (BIT(5) | BIT(4))
+#define RT9455_REG_CTRL1_STAT_SHIFT 4
+#define RT9455_REG_CTRL1_BOOST_MASK BIT(3)
+#define RT9455_REG_CTRL1_BOOST_SHIFT 3
+#define RT9455_REG_CTRL1_PWR_RDY_MASK BIT(2)
+#define RT9455_REG_CTRL1_PWR_RDY_SHIFT 2
+#define RT9455_REG_CTRL1_OTG_PIN_POLARITY_MASK BIT(1)
+#define RT9455_REG_CTRL1_OTG_PIN_POLARITY_SHIFT 1
+
+#define RT9455_REG_CTRL2 0x01 /* Control2 */
+#define RT9455_REG_CTRL2_IAICR_MASK (BIT(7) | BIT(6))
+#define RT9455_REG_CTRL2_IAICR_SHIFT 6
+#define RT9455_REG_CTRL2_TE_SHDN_EN_MASK BIT(5)
+#define RT9455_REG_CTRL2_TE_SHDN_EN_SHIFT 5
+#define RT9455_REG_CTRL2_HIGHER_OCP_MASK BIT(4)
+#define RT9455_REG_CTRL2_HIGHER_OCP_SHIFT 4
+#define RT9455_REG_CTRL2_TE_MASK BIT(3)
+#define RT9455_REG_CTRL2_TE_SHIFT 3
+#define RT9455_REG_CTRL2_IAICR_INT_MASK BIT(2)
+#define RT9455_REG_CTRL2_IAICR_INT_SHIFT 2
+#define RT9455_REG_CTRL2_HIZ_MASK BIT(1)
+#define RT9455_REG_CTRL2_HIZ_SHIFT 1
+#define RT9455_REG_CTRL2_OPA_MODE_MASK BIT(0)
+#define RT9455_REG_CTRL2_OPA_MODE_SHIFT 0
+
+#define RT9455_REG_CTRL3 0x02 /* Control3 */
+#define RT9455_REG_CTRL3_VOREG_MASK (BIT(7) | BIT(6) | BIT(5) | \
+ BIT(4) | BIT(3) | BIT(2))
+#define RT9455_REG_CTRL3_VOREG_SHIFT 2
+#define RT9455_REG_CTRL3_OTG_PL_MASK BIT(1)
+#define RT9455_REG_CTRL3_OTG_PL_SHIFT 1
+#define RT9455_REG_CTRL3_OTG_EN_MASK BIT(0)
+#define RT9455_REG_CTRL3_OTG_EN_SHIFT 0
+
+#define RT9455_REG_DEV_ID 0x03 /* Device ID */
+#define RT9455_REG_DEV_ID_VENDOR_ID_MASK (BIT(7) | BIT(6) | BIT(5) | \
+ BIT(4))
+#define RT9455_REG_DEV_ID_VENDOR_ID_SHIFT 4
+#define RT9455_REG_DEV_ID_CHIP_REV_MASK (BIT(3) | BIT(2) |
BIT(1) | \
+ BIT(0))
+#define RT9455_REG_DEV_ID_CHIP_REV_SHIFT 0
+
+#define RT9455_REG_CTRL4 0x04 /* Control4 */
+#define RT9455_REG_CTRL4_RST_MASK BIT(7)
+#define RT9455_REG_CTRL4_RST_SHIFT 7
+
+#define RT9455_REG_CTRL5 0x05 /* Control5 */
+#define RT9455_REG_CTRL5_TMR_EN_MASK BIT(7)
+#define RT9455_REG_CTRL5_TMR_EN_SHIFT 7
+#define RT9455_REG_CTRL5_VMIVR_MASK (BIT(5) | BIT(4))
+#define RT9455_REG_CTRL5_VMIVR_SHIFT 4
+#define RT9455_REG_CTRL5_IPREC_MASK (BIT(3) | BIT(2))
+#define RT9455_REG_CTRL5_IPREC_SHIFT 2
+#define RT9455_REG_CTRL5_IEOC_PERCENTAGE_MASK (BIT(1) | BIT(0))
+#define RT9455_REG_CTRL5_IEOC_PERCENTAGE_SHIFT 0
+
+#define RT9455_REG_CTRL6 0x06 /* Control6 */
+#define RT9455_REG_CTRL6_IAICR_SEL_MASK BIT(7)
+#define RT9455_REG_CTRL6_IAICR_SEL_SHIFT 7
+#define RT9455_REG_CTRL6_ICHRG_MASK (BIT(6) | BIT(5) | BIT(4))
+#define RT9455_REG_CTRL6_ICHRG_SHIFT 4
+#define RT9455_REG_CTRL6_VPREC_MASK (BIT(2) | BIT(1) | BIT(0))
+#define RT9455_REG_CTRL6_VPREC_SHIFT 0
+
+#define RT9455_REG_CTRL7 0x07 /* Control7 */
+#define RT9455_REG_CTRL7_BATD_EN_MASK BIT(6)
+#define RT9455_REG_CTRL7_BATD_EN_SHIFT 6
+#define RT9455_REG_CTRL7_CHG_EN_MASK BIT(4)
+#define RT9455_REG_CTRL7_CHG_EN_SHIFT 4
+#define RT9455_REG_CTRL7_VMREG_MASK (BIT(3) | BIT(2) | BIT(1) | \
+ BIT(0))
+#define RT9455_REG_CTRL7_VMREG_SHIFT 0
+
+#define RT9455_REG_IRQ1 0x08 /* IRQ1 */
+#define RT9455_REG_IRQ1_TSDI_MASK BIT(7)
+#define RT9455_REG_IRQ1_TSDI_SHIFT 7
+#define RT9455_REG_IRQ1_VINOVPI_MASK BIT(6)
+#define RT9455_REG_IRQ1_VINOVPI_SHIFT 6
+#define RT9455_REG_IRQ1_BATAB_MASK BIT(0)
+#define RT9455_REG_IRQ1_BATAB_SHIFT 0
+
+#define RT9455_REG_IRQ2 0x09 /* IRQ2 */
+#define RT9455_REG_IRQ2_CHRVPI_MASK BIT(7)
+#define RT9455_REG_IRQ2_CHRVPI_SHIFT 7
+#define RT9455_REG_IRQ2_CHBATOVI_MASK BIT(5)
+#define RT9455_REG_IRQ2_CHBATOVI_SHIFT 5
+#define RT9455_REG_IRQ2_CHTERMI_MASK BIT(4)
+#define RT9455_REG_IRQ2_CHTERMI_SHIFT 4
+#define RT9455_REG_IRQ2_CHRCHGI_MASK BIT(3)
+#define RT9455_REG_IRQ2_CHRCHGI_SHIFT 3
+#define RT9455_REG_IRQ2_CH32MI_MASK BIT(2)
+#define RT9455_REG_IRQ2_CH32MI_SHIFT 2
+#define RT9455_REG_IRQ2_CHTREGI_MASK BIT(1)
+#define RT9455_REG_IRQ2_CHTREGI_SHIFT 1
+#define RT9455_REG_IRQ2_CHMIVRI_MASK BIT(0)
+#define RT9455_REG_IRQ2_CHMIVRI_SHIFT 0
+
+#define RT9455_REG_IRQ3 0x0A /* IRQ3 */
+#define RT9455_REG_IRQ3_BSTBUSOVI_MASK BIT(7)
+#define RT9455_REG_IRQ3_BSTBUSOVI_SHIFT 7
+#define RT9455_REG_IRQ3_BSTOLI_MASK BIT(6)
+#define RT9455_REG_IRQ3_BSTOLI_SHIFT 6
+#define RT9455_REG_IRQ3_BSTLOWVI_MASK BIT(5)
+#define RT9455_REG_IRQ3_BSTLOWVI_SHIFT 5
+#define RT9455_REG_IRQ3_BST32SI_MASK BIT(3)
+#define RT9455_REG_IRQ3_BST32SI_SHIFT 3
+
+#define RT9455_REG_MASK1 0x0B /* MASK1 */
+#define RT9455_REG_MASK1_TSDM_MASK BIT(7)
+#define RT9455_REG_MASK1_TSDM_SHIFT 7
+#define RT9455_REG_MASK1_VINOVPIM_MASK BIT(6)
+#define RT9455_REG_MASK1_VINOVPIM_SHIFT 6
+#define RT9455_REG_MASK1_BATABM_MASK BIT(0)
+#define RT9455_REG_MASK1_BATABM_SHIFT 0
+
+#define RT9455_REG_MASK2 0x0C /* MASK2 */
+#define RT9455_REG_MASK2_CHRVPIM_MASK BIT(7)
+#define RT9455_REG_MASK2_CHRVPIM_SHIFT 7
+#define RT9455_REG_MASK2_CHBATOVIM_MASK BIT(5)
+#define RT9455_REG_MASK2_CHBATOVIM_SHIFT 5
+#define RT9455_REG_MASK2_CHTERMIM_MASK BIT(4)
+#define RT9455_REG_MASK2_CHTERMIM_SHIFT 4
+#define RT9455_REG_MASK2_CHRCHGIM_MASK BIT(3)
+#define RT9455_REG_MASK2_CHRCHGIM_SHIFT 3
+#define RT9455_REG_MASK2_CH32MIM_MASK BIT(2)
+#define RT9455_REG_MASK2_CH32MIM_SHIFT 2
+#define RT9455_REG_MASK2_CHTREGIM_MASK BIT(1)
+#define RT9455_REG_MASK2_CHTREGIM_SHIFT 1
+#define RT9455_REG_MASK2_CHMIVRIM_MASK BIT(0)
+#define RT9455_REG_MASK2_CHMIVRIM_SHIFT 0
+
+#define RT9455_REG_MASK3 0x0D /* MASK3 */
+#define RT9455_REG_MASK3_BSTVINOVIM_MASK BIT(7)
+#define RT9455_REG_MASK3_BSTVINOVIM_SHIFT 7
+#define RT9455_REG_MASK3_BSTOLIM_MASK BIT(6)
+#define RT9455_REG_MASK3_BSTOLIM_SHIFT 6
+#define RT9455_REG_MASK3_BSTLOWVIM_MASK BIT(5)
+#define RT9455_REG_MASK3_BSTLOWVIM_SHIFT 5
+#define RT9455_REG_MASK3_BST32SIM_MASK BIT(3)
+#define RT9455_REG_MASK3_BST32SIM_SHIFT 3
+
+/*
+ * Each array initialised below shows the possible real-world values for a
+ * group of bits belonging to RT9455 registers. The arrays are sorted in
+ * ascending order. The index of each real-world value represents the value
+ * that is encoded in the group of bits belonging to RT9455 registers.
+ */
+/* REG06[6:4] (ICHRG) in uAh */
+static const int rt9455_ichrg_values[] = {
+ 500000, 650000, 800000, 950000, 1100000, 1250000, 1400000, 1550000
+};
+
+/* REG02[7:2] (VOREG) in uV */
+static const int rt9455_voreg_values[] = {
+ 3500000, 3520000, 3540000, 3560000, 3580000, 3600000, 3620000, 3640000,
+ 3660000, 3680000, 3700000, 3720000, 3740000, 3760000, 3780000, 3800000,
+ 3820000, 3840000, 3860000, 3880000, 3900000, 3920000, 3940000, 3960000,
+ 3980000, 4000000, 4020000, 4040000, 4060000, 4080000, 4100000, 4120000,
+ 4140000, 4160000, 4180000, 4200000, 4220000, 4240000, 4260000, 4280000,
+ 4300000, 4330000, 4350000, 4370000, 4390000, 4410000, 4430000, 4450000,
+ 4450000, 4450000, 4450000, 4450000, 4450000, 4450000, 4450000, 4450000,
+ 4450000, 4450000, 4450000, 4450000, 4450000, 4450000, 4450000, 4450000
+};
+
+/* REG07[3:0] (VMREG) in uV */
+static const int rt9455_vmreg_values[] = {
+ 4200000, 4220000, 4240000, 4260000, 4280000, 4300000, 4320000, 4340000,
+ 4360000, 4380000, 4400000, 4430000, 4450000, 4450000, 4450000, 4450000
+};
+
+/* REG05[5:4] (IEOC_PERCENTAGE) */
+static const int rt9455_ieoc_percentage_values[] = {
+ 10, 30, 20, 30
+};
+
+/* REG05[1:0] (VMIVR) in uV */
+static const int rt9455_vmivr_values[] = {
+ 4000000, 4250000, 4500000, 5000000
+};
+
+/* REG05[1:0] (IAICR) in uA */
+static const int rt9455_iaicr_values[] = {
+ 100000, 500000, 1000000, 2000000
+};
+
+struct rt9455_info {
+ struct i2c_client *client;
+ struct power_supply *charger;
+#if IS_ENABLED(CONFIG_USB_PHY)
+ struct usb_phy *usb_phy;
+ struct notifier_block nb;
+#endif
+ struct gpio_desc *gpiod_irq;
+ unsigned int gpio_irq;
+ struct delayed_work pwr_rdy_work;
+ struct delayed_work max_charging_time_work;
+ struct delayed_work batt_presence_work;
+};
+
+/* I2C read/write API */
+static int rt9455_read(struct rt9455_info *info, u8 reg, u8 *data)
+{
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(info->client, reg);
+ if (ret < 0)
+ return ret;
+
+ *data = ret;
+ return 0;
+}
+
+static int rt9455_write(struct rt9455_info *info, u8 reg, u8 data)
+{
+ return i2c_smbus_write_byte_data(info->client, reg, data);
+}
+
+static int rt9455_read_mask(struct rt9455_info *info, u8 reg,
+ u8 mask, u8 shift, u8 *data)
+{
+ u8 v;
+ int ret;
+
+ ret = rt9455_read(info, reg, &v);
+ if (ret < 0)
+ return ret;
+
+ v &= mask;
+ v >>= shift;
+ *data = v;
+
+ return 0;
+}
+
+static int rt9455_write_mask(struct rt9455_info *info, u8 reg,
+ u8 mask, u8 shift, u8 data)
+{
+ u8 v;
+ int ret;
+
+ ret = rt9455_read(info, reg, &v);
+ if (ret < 0)
+ return ret;
+
+ v &= ~mask;
+ v |= ((data << shift) & mask);
+
+ return rt9455_write(info, reg, v);
+}
+
+/*
+ * Iterate through each element of the 'tbl' array until an element whose value
+ * is greater than v is found. Return the index of the respective element,
+ * or the index of the last element in the array, if no such element is found.
+ */
+static u8 rt9455_find_idx(const int tbl[], int tbl_size, int v)
+{
+ int i;
+
+ /* No need to iterate until the last index in the table because
+ * if no element greater than v is found in the table,
+ * or if only the last element is greater than v,
+ * function returns the index of the last element.
+ */
+ for (i = 0; i < tbl_size - 1; i++)
+ if (v <= tbl[i])
+ return i;
+
+ return (tbl_size - 1);
+}
+
+static int rt9455_get_field_val(struct rt9455_info *info,
+ u8 reg, u8 mask, u8 shift,
+ const int tbl[], int tbl_size,
+ int *val)
+{
+ u8 v;
+ int ret;
+
+ ret = rt9455_read_mask(info, reg, mask, shift, &v);
+ if (ret)
+ return ret;
+
+ v = (v >= tbl_size) ? (tbl_size - 1) : v;
+ *val = tbl[v];
+
+ return 0;
+}
+
+static int rt9455_set_field_val(struct rt9455_info *info,
+ u8 reg, u8 mask, u8 shift,
+ const int tbl[], int tbl_size,
+ int val)
+{
+ u8 idx;
+
+ idx = rt9455_find_idx(tbl, tbl_size, val);
+
+ return rt9455_write_mask(info, reg, mask, shift, idx);
+}
+
+static int rt9455_register_reset(struct rt9455_info *info)
+{
+ struct device *dev = &info->client->dev;
+ int ret, limit = 100;
+ u8 v;
+
+ ret = rt9455_write_mask(info, RT9455_REG_CTRL4,
+ RT9455_REG_CTRL4_RST_MASK,
+ RT9455_REG_CTRL4_RST_SHIFT,
+ 0x1);
+ if (ret) {
+ dev_err(dev, "Failed to set RST bit\n");
+ return ret;
+ }
+
+ /* To make sure that reset operation has finished, loop until RST bit
+ * is set to 0.
+ */
+ do {
+ ret = rt9455_read_mask(info, RT9455_REG_CTRL4,
+ RT9455_REG_CTRL4_RST_MASK,
+ RT9455_REG_CTRL4_RST_SHIFT,
+ &v);
+ if (ret) {
+ dev_err(dev, "Failed to read RST bit\n");
+ return ret;
+ }
+
+ if (!v)
+ break;
+
+ usleep_range(10, 100);
+ } while (--limit);
+
+ if (!limit)
+ return -EIO;
+
+ return 0;
+}
+
+/* Charger power supply property routines */
+static enum power_supply_property rt9455_charger_properties[] = {
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_HEALTH,
+ POWER_SUPPLY_PROP_PRESENT,
+ POWER_SUPPLY_PROP_ONLINE,
+ 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_SCOPE,
+ POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
+ POWER_SUPPLY_PROP_MODEL_NAME,
+ POWER_SUPPLY_PROP_MANUFACTURER,
+};
+
+static char *rt9455_charger_supplied_to[] = {
+ "main-battery",
+};
+
+static int rt9455_charger_get_status(struct rt9455_info *info,
+ union power_supply_propval *val)
+{
+ int ret;
+ u8 v;
+
+ ret = rt9455_read_mask(info, RT9455_REG_CTRL1,
+ RT9455_REG_CTRL1_STAT_MASK,
+ RT9455_REG_CTRL1_STAT_SHIFT,
+ &v);
+ if (ret) {
+ dev_err(&info->client->dev, "Failed to read STAT bits\n");
+ return ret;
+ }
+
+ switch (v) {
+ case 0:
+ val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
+ break;
+ case 1:
+ val->intval = POWER_SUPPLY_STATUS_CHARGING;
+ break;
+ case 2:
+ val->intval = POWER_SUPPLY_STATUS_FULL;
+ break;
+ default:
+ val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
+ break;
+ }
+
+ return 0;
+}
+
+static int rt9455_charger_get_health(struct rt9455_info *info,
+ union power_supply_propval *val)
+{
+ struct device *dev = &info->client->dev;
+ int ret;
+ u8 v;
+
+ val->intval = POWER_SUPPLY_HEALTH_GOOD;
+
+ ret = rt9455_read_mask(info, RT9455_REG_CTRL1,
+ RT9455_REG_CTRL1_STAT_MASK,
+ RT9455_REG_CTRL1_STAT_SHIFT,
+ &v);
+ if (ret) {
+ dev_err(dev, "Failed to read STAT bits\n");
+ return ret;
+ }
+
+ if (v == RT9455_FAULT) {
+ val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
+ return 0;
+ }
+
+ ret = rt9455_read(info, RT9455_REG_IRQ1, &v);
+ if (ret) {
+ dev_err(dev, "Failed to read IRQ1 register\n");
+ return ret;
+ }
+
+ if (v & RT9455_REG_IRQ1_TSDI_MASK) {
+ val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
+ return 0;
+ }
+ if (v & RT9455_REG_IRQ1_VINOVPI_MASK) {
+ val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+ return 0;
+ }
+ if (v & RT9455_REG_IRQ1_BATAB_MASK) {
+ val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
+ return 0;
+ }
+
+ ret = rt9455_read(info, RT9455_REG_IRQ2, &v);
+ if (ret) {
+ dev_err(dev, "Failed to read IRQ2 register\n");
+ return ret;
+ }
+
+ if (v & RT9455_REG_IRQ2_CHBATOVI_MASK) {
+ val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
+ return 0;
+ }
+ if (v & RT9455_REG_IRQ2_CH32MI_MASK) {
+ val->intval = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
+ return 0;
+ }
+
+ ret = rt9455_read(info, RT9455_REG_IRQ3, &v);
+ if (ret) {
+ dev_err(dev, "Failed to read IRQ3 register\n");
+ return ret;
+ }
+
+ if (v & RT9455_REG_IRQ3_BSTBUSOVI_MASK) {
+ val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
+ return 0;
+ }
+ if (v & RT9455_REG_IRQ3_BSTOLI_MASK) {
+ val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+ return 0;
+ }
+ if (v & RT9455_REG_IRQ3_BSTLOWVI_MASK) {
+ val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
+ return 0;
+ }
+ if (v & RT9455_REG_IRQ3_BST32SI_MASK) {
+ val->intval = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
+ return 0;
+ }
+
+ return 0;
+}
+
+static int rt9455_charger_get_battery_presence(struct rt9455_info *info,
+ union power_supply_propval *val)
+{
+ int ret;
+ u8 v;
+
+ ret = rt9455_read_mask(info, RT9455_REG_IRQ1,
+ RT9455_REG_IRQ1_BATAB_MASK,
+ RT9455_REG_IRQ1_BATAB_SHIFT,
+ &v);
+ if (ret) {
+ dev_err(&info->client->dev, "Failed to read BATAB bit\n");
+ return ret;
+ }
+
+ /* Since BATAB is 1 when battery is NOT present and 0 otherwise,
+ * we return !BATAB.
+ */
+ val->intval = !v;
+
+ return 0;
+}
+
+static int rt9455_charger_get_online(struct rt9455_info *info,
+ union power_supply_propval *val)
+{
+ int ret;
+ u8 v;
+
+ ret = rt9455_read_mask(info, RT9455_REG_CTRL1,
+ RT9455_REG_CTRL1_PWR_RDY_MASK,
+ RT9455_REG_CTRL1_PWR_RDY_SHIFT,
+ &v);
+ if (ret) {
+ dev_err(&info->client->dev, "Failed to read PWR_RDY bit\n");
+ return ret;
+ }
+
+ val->intval = v;
+
+ return 0;
+}
+
+static int rt9455_charger_get_current(struct rt9455_info *info,
+ union power_supply_propval *val)
+{
+ int ret, curr;
+
+ ret = rt9455_get_field_val(info, RT9455_REG_CTRL6,
+ RT9455_REG_CTRL6_ICHRG_MASK,
+ RT9455_REG_CTRL6_ICHRG_SHIFT,
+ rt9455_ichrg_values,
+ ARRAY_SIZE(rt9455_ichrg_values),
+ &curr);
+ if (ret) {
+ dev_err(&info->client->dev, "Failed to read ICHRG value\n");
+ return ret;
+ }
+
+ val->intval = curr;
+
+ return 0;
+}
+
+static int rt9455_charger_get_current_max(struct rt9455_info *info,
+ union power_supply_propval *val)
+{
+ int idx = ARRAY_SIZE(rt9455_ichrg_values) - 1;
+
+ val->intval = rt9455_ichrg_values[idx];
+
+ return 0;
+}
+
+static int rt9455_charger_get_voltage(struct rt9455_info *info,
+ union power_supply_propval *val)
+{
+ int voltage, ret;
+
+ ret = rt9455_get_field_val(info, RT9455_REG_CTRL3,
+ RT9455_REG_CTRL3_VOREG_MASK,
+ RT9455_REG_CTRL3_VOREG_SHIFT,
+ rt9455_voreg_values,
+ ARRAY_SIZE(rt9455_voreg_values),
+ &voltage);
+ if (ret) {
+ dev_err(&info->client->dev, "Failed to read VOREG value\n");
+ return ret;
+ }
+
+ val->intval = voltage;
+
+ return 0;
+}
+
+static int rt9455_charger_get_voltage_max(struct rt9455_info *info,
+ union power_supply_propval *val)
+{
+ int voltage_max, ret;
+
+ ret = rt9455_get_field_val(info, RT9455_REG_CTRL7,
+ RT9455_REG_CTRL7_VMREG_MASK,
+ RT9455_REG_CTRL7_VMREG_SHIFT,
+ rt9455_vmreg_values,
+ ARRAY_SIZE(rt9455_vmreg_values),
+ &voltage_max);
+ if (ret) {
+ dev_err(&info->client->dev, "Failed to read VMREG value\n");
+ return ret;
+ }
+
+ val->intval = voltage_max;
+
+ return 0;
+}
+
+static int rt9455_charger_get_term_current(struct rt9455_info *info,
+ union power_supply_propval *val)
+{
+ struct device *dev = &info->client->dev;
+ int ichrg, ieoc_percentage, ret;
+
+ ret = rt9455_get_field_val(info, RT9455_REG_CTRL6,
+ RT9455_REG_CTRL6_ICHRG_MASK,
+ RT9455_REG_CTRL6_ICHRG_SHIFT,
+ rt9455_ichrg_values,
+ ARRAY_SIZE(rt9455_ichrg_values),
+ &ichrg);
+ if (ret) {
+ dev_err(dev, "Failed to read ICHRG value\n");
+ return ret;
+ }
+
+ ret = rt9455_get_field_val(info, RT9455_REG_CTRL5,
+ RT9455_REG_CTRL5_IEOC_PERCENTAGE_MASK,
+ RT9455_REG_CTRL5_IEOC_PERCENTAGE_SHIFT,
+ rt9455_ieoc_percentage_values,
+ ARRAY_SIZE(rt9455_ieoc_percentage_values),
+ &ieoc_percentage);
+ if (ret) {
+ dev_err(dev, "Failed to read IEOC value\n");
+ return ret;
+ }
+
+ val->intval = ichrg * ieoc_percentage / 100;
+
+ return 0;
+}
+
+static int rt9455_charger_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct rt9455_info *info = power_supply_get_drvdata(psy);
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_STATUS:
+ return rt9455_charger_get_status(info, val);
+ case POWER_SUPPLY_PROP_HEALTH:
+ return rt9455_charger_get_health(info, val);
+ case POWER_SUPPLY_PROP_PRESENT:
+ return rt9455_charger_get_battery_presence(info, val);
+ case POWER_SUPPLY_PROP_ONLINE:
+ return rt9455_charger_get_online(info, val);
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+ return rt9455_charger_get_current(info, val);
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
+ return rt9455_charger_get_current_max(info, val);
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+ return rt9455_charger_get_voltage(info, val);
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
+ return rt9455_charger_get_voltage_max(info, val);
+ case POWER_SUPPLY_PROP_SCOPE:
+ val->intval = POWER_SUPPLY_SCOPE_SYSTEM;
+ return 0;
+ case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
+ return rt9455_charger_get_term_current(info, val);
+ case POWER_SUPPLY_PROP_MODEL_NAME:
+ val->strval = RT9455_MODEL_NAME;
+ return 0;
+ case POWER_SUPPLY_PROP_MANUFACTURER:
+ val->strval = RT9455_MANUFACTURER;
+ return 0;
+ default:
+ return -ENODATA;
+ }
+}
+
+static int rt9455_charger_set_current(struct rt9455_info *info,
+ const union power_supply_propval *val)
+{
+ return rt9455_set_field_val(info, RT9455_REG_CTRL6,
+ RT9455_REG_CTRL6_ICHRG_MASK,
+ RT9455_REG_CTRL6_ICHRG_SHIFT,
+ rt9455_ichrg_values,
+ ARRAY_SIZE(rt9455_ichrg_values),
+ val->intval);
+}
+
+static int rt9455_charger_set_voltage(struct rt9455_info *info,
+ const union power_supply_propval *val)
+{
+ return rt9455_set_field_val(info, RT9455_REG_CTRL3,
+ RT9455_REG_CTRL3_VOREG_MASK,
+ RT9455_REG_CTRL3_VOREG_SHIFT,
+ rt9455_voreg_values,
+ ARRAY_SIZE(rt9455_voreg_values),
+ val->intval);
+}
+
+static int rt9455_charger_set_voltage_max(struct rt9455_info *info,
+ const union power_supply_propval *val)
+{
+ return rt9455_set_field_val(info, RT9455_REG_CTRL7,
+ RT9455_REG_CTRL7_VMREG_MASK,
+ RT9455_REG_CTRL7_VMREG_SHIFT,
+ rt9455_voreg_values,
+ ARRAY_SIZE(rt9455_voreg_values),
+ val->intval);
+}
+
+static int rt9455_charger_set_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ const union power_supply_propval *val)
+{
+ struct rt9455_info *info = power_supply_get_drvdata(psy);
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+ return rt9455_charger_set_current(info, val);
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+ return rt9455_charger_set_voltage(info, val);
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
+ return rt9455_charger_set_voltage_max(info, val);
+ default:
+ return -EINVAL;
+ }
+}
+
+static int rt9455_charger_property_is_writeable(struct power_supply *psy,
+ enum power_supply_property psp)
+{
+ switch (psp) {
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
+ return 1;
+ default:
+ return 0;
+ }
+}
+
+static int rt9455_hw_init(struct rt9455_info *info, u32 ichrg,
+ u32 ieoc_percentage, u32 voreg,
+ u32 vmivr, u32 iaicr)
+{
+ struct device *dev = &info->client->dev;
+ int ret;
+
+ ret = rt9455_register_reset(info);
+ if (ret) {
+ dev_err(dev, "Power On Reset failed\n");
+ return ret;
+ }
+
+ /* Set TE bit in order to enable end of charge detection */
+ ret = rt9455_write_mask(info, RT9455_REG_CTRL2,
+ RT9455_REG_CTRL2_TE_MASK,
+ RT9455_REG_CTRL2_TE_SHIFT,
+ 0x01);
+ if (ret) {
+ dev_err(dev, "Failed to set TE bit\n");
+ return ret;
+ }
+
+ /* Set TE_SHDN_EN bit in order to enable end of charge detection */
+ ret = rt9455_write_mask(info, RT9455_REG_CTRL2,
+ RT9455_REG_CTRL2_TE_SHDN_EN_MASK,
+ RT9455_REG_CTRL2_TE_SHDN_EN_SHIFT,
+ 0x01);
+ if (ret) {
+ dev_err(dev, "Failed to set TE_SHDN_EN bit\n");
+ return ret;
+ }
+
+ /* Set BATD_EN bit in order to enable battery detection
+ * when charging is done
+ */
+ ret = rt9455_write_mask(info, RT9455_REG_CTRL7,
+ RT9455_REG_CTRL7_BATD_EN_MASK,
+ RT9455_REG_CTRL7_BATD_EN_SHIFT,
+ 0x01);
+ if (ret) {
+ dev_err(dev, "Failed to set BATD_EN bit\n");
+ return ret;
+ }
+
+ /* Disable Safety Timer. In charge mode, this timer terminates charging
+ * if no read or write via I2C is done within 32 minutes. This timer
+ * avoids overcharging the baterry when the OS is not loaded and the
+ * charger is connected to a power source.
+ * In boost mode, this timer triggers BST32SI interrupt if no read or
+ * write via I2C is done within 32 seconds.
+ * When the OS is loaded and the charger driver is inserted, we use
+ * delayed_work, named max_charging_time_work, to avoid overcharging
+ * the battery.
+ */
+ ret = rt9455_write_mask(info, RT9455_REG_CTRL5,
+ RT9455_REG_CTRL5_TMR_EN_MASK,
+ RT9455_REG_CTRL5_TMR_EN_SHIFT,
+ 0x00);
+ if (ret) {
+ dev_err(dev, "Failed to disable Safety Timer\n");
+ return ret;
+ }
+
+ /* Set ICHRG to value retrieved from device-specific data */
+ ret = rt9455_set_field_val(info, RT9455_REG_CTRL6,
+ RT9455_REG_CTRL6_ICHRG_MASK,
+ RT9455_REG_CTRL6_ICHRG_SHIFT,
+ rt9455_ichrg_values,
+ ARRAY_SIZE(rt9455_ichrg_values), ichrg);
+ if (ret) {
+ dev_err(dev, "Failed to set ICHRG value\n");
+ return ret;
+ }
+
+ /* Set IEOC Percentage to value retrieved from device-specific data */
+ ret = rt9455_set_field_val(info, RT9455_REG_CTRL5,
+ RT9455_REG_CTRL5_IEOC_PERCENTAGE_MASK,
+ RT9455_REG_CTRL5_IEOC_PERCENTAGE_SHIFT,
+ rt9455_ieoc_percentage_values,
+ ARRAY_SIZE(rt9455_ieoc_percentage_values),
+ ieoc_percentage);
+ if (ret) {
+ dev_err(dev, "Failed to set IEOC Percentage value\n");
+ return ret;
+ }
+
+ /* Set VOREG to value retrieved from device-specific data */
+ ret = rt9455_set_field_val(info, RT9455_REG_CTRL3,
+ RT9455_REG_CTRL3_VOREG_MASK,
+ RT9455_REG_CTRL3_VOREG_SHIFT,
+ rt9455_voreg_values,
+ ARRAY_SIZE(rt9455_voreg_values), voreg);
+ if (ret) {
+ dev_err(dev, "Failed to set VOREG value\n");
+ return ret;
+ }
+
+ /* Set VMIVR to value retrieved from device-specific data.
+ * If no value is specified, default value for VMIVR is 4.5V.
+ */
+ if (vmivr == -1)
+ vmivr = 4500000;
+
+ ret = rt9455_set_field_val(info, RT9455_REG_CTRL5,
+ RT9455_REG_CTRL5_VMIVR_MASK,
+ RT9455_REG_CTRL5_VMIVR_SHIFT,
+ rt9455_vmivr_values,
+ ARRAY_SIZE(rt9455_vmivr_values), vmivr);
+ if (ret) {
+ dev_err(dev, "Failed to set VMIVR value\n");
+ return ret;
+ }
+
+ /* Set IAICR to value retrieved from device-specific data.
+ * If no value is specified, default value for IAICR is 500 mA.
+ */
+ if (iaicr == -1)
+ iaicr = 500000;
+
+ ret = rt9455_set_field_val(info, RT9455_REG_CTRL2,
+ RT9455_REG_CTRL2_IAICR_MASK,
+ RT9455_REG_CTRL2_IAICR_SHIFT,
+ rt9455_iaicr_values,
+ ARRAY_SIZE(rt9455_iaicr_values), iaicr);
+ if (ret) {
+ dev_err(dev, "Failed to set IAICR value\n");
+ return ret;
+ }
+
+ ret = rt9455_write_mask(info, RT9455_REG_CTRL2,
+ RT9455_REG_CTRL2_IAICR_INT_MASK,
+ RT9455_REG_CTRL2_IAICR_INT_SHIFT,
+ 0x01);
+ if (ret) {
+ dev_err(dev, "Failed to set IAICR_INT bit\n");
+ return ret;
+ }
+
+ ret = rt9455_write_mask(info, RT9455_REG_MASK2,
+ RT9455_REG_MASK2_CHMIVRIM_MASK,
+ RT9455_REG_MASK2_CHMIVRIM_SHIFT,
+ 0x01);
+ if (ret) {
+ dev_err(dev, "Failed to mask CHMIVRI interrupt\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int rt9455_irq_handler_check_irq1_register(struct rt9455_info *info,
+ bool *_is_battery_absent,
+ bool *_alert_userspace)
+{
+ u8 irq1, mask1, mask2;
+ struct device *dev = &info->client->dev;
+ bool is_battery_absent = false;
+ bool alert_userspace = false;
+ int ret;
+
+ ret = rt9455_read(info, RT9455_REG_IRQ1, &irq1);
+ if (ret) {
+ dev_err(dev, "Failed to read IRQ1 register\n");
+ return ret;
+ }
+
+ ret = rt9455_read(info, RT9455_REG_MASK1, &mask1);
+ if (ret) {
+ dev_err(dev, "Failed to read MASK1 register\n");
+ return ret;
+ }
+
+ if (irq1 & RT9455_REG_IRQ1_TSDI_MASK) {
+ dev_err(dev, "Thermal shutdown fault occurred\n");
+ alert_userspace = true;
+ }
+
+ if (irq1 & RT9455_REG_IRQ1_VINOVPI_MASK) {
+ dev_err(dev, "Overvoltage input occurred\n");
+ alert_userspace = true;
+ }
+
+ if (irq1 & RT9455_REG_IRQ1_BATAB_MASK) {
+ dev_err(dev, "Battery absence occurred\n");
+ is_battery_absent = true;
+ alert_userspace = true;
+
+ if ((mask1 & RT9455_REG_MASK1_BATABM_MASK) == 0) {
+ ret = rt9455_write_mask(info, RT9455_REG_MASK1,
+ RT9455_REG_MASK1_BATABM_MASK,
+ RT9455_REG_MASK1_BATABM_SHIFT,
+ 0x01);
+ if (ret) {
+ dev_err(dev, "Failed to mask BATAB
interrupt\n");
+ return ret;
+ }
+ }
+
+ ret = rt9455_read(info, RT9455_REG_MASK2, &mask2);
+ if (ret) {
+ dev_err(dev, "Failed to read MASK2 register\n");
+ return ret;
+ }
+
+ if ((mask2 & RT9455_REG_MASK2_CHTERMIM_MASK)) {
+ ret = rt9455_write_mask(info, RT9455_REG_MASK2,
+ RT9455_REG_MASK2_CHTERMIM_MASK,
+ RT9455_REG_MASK2_CHTERMIM_SHIFT,
+ 0x00);
+ if (ret) {
+ dev_err(dev, "Failed to unmask CHTERMI
interrupt\n");
+ return ret;
+ }
+ }
+
+ if ((mask2 & RT9455_REG_MASK2_CHRCHGIM_MASK)) {
+ ret = rt9455_write_mask(info, RT9455_REG_MASK2,
+ RT9455_REG_MASK2_CHRCHGIM_MASK,
+ RT9455_REG_MASK2_CHRCHGIM_SHIFT,
+ 0x00);
+ if (ret) {
+ dev_err(dev, "Failed to unmask CHRCHGI
interrupt\n");
+ return ret;
+ }
+ }
+
+ /* When the battery is absent, max_charging_time_work is
+ * cancelled, since no charging is done.
+ */
+ cancel_delayed_work_sync(&info->max_charging_time_work);
+ /* Since no interrupt is triggered when the battery is
+ * reconnected, max_charging_time_work is not rescheduled.
+ * Therefore, batt_presence_work is scheduled to check whether
+ * the battery is still absent or not.
+ */
+ schedule_delayed_work(&info->batt_presence_work,
+ RT9455_BATT_PRESENCE_DELAY * HZ);
+ }
+
+ *_is_battery_absent = is_battery_absent;
+
+ if (alert_userspace)
+ *_alert_userspace = alert_userspace;
+
+ return 0;
+}
+
+static int rt9455_irq_handler_check_irq2_register(struct rt9455_info *info,
+ bool is_battery_absent,
+ bool *_alert_userspace)
+{
+ u8 irq2, mask2;
+ struct device *dev = &info->client->dev;
+ bool alert_userspace = false;
+ int ret;
+
+ ret = rt9455_read(info, RT9455_REG_IRQ2, &irq2);
+ if (ret) {
+ dev_err(dev, "Failed to read IRQ2 register\n");
+ return ret;
+ }
+
+ ret = rt9455_read(info, RT9455_REG_MASK2, &mask2);
+ if (ret) {
+ dev_err(dev, "Failed to read MASK2 register\n");
+ return ret;
+ }
+
+ if (irq2 & RT9455_REG_IRQ2_CHRVPI_MASK) {
+ dev_dbg(dev, "Charger fault occurred\n");
+ alert_userspace = true;
+ /* CHRVPI bit is set in 2 cases:
+ * 1. when the power source is connected to the charger.
+ * 2. when the power source is disconnected from the charger.
+ * To identify the case, PWR_RDY bit is checked. Because
+ * PWR_RDY bit is set / cleared after CHRVPI interrupt is
+ * triggered, we use delayed_work to later read PWR_RDY bit.
+ */
+ schedule_delayed_work(&info->pwr_rdy_work,
+ RT9455_PWR_RDY_DELAY * HZ);
+ }
+ if (irq2 & RT9455_REG_IRQ2_CHBATOVI_MASK) {
+ dev_err(dev, "Battery OVP occurred\n");
+ alert_userspace = true;
+ }
+ if (irq2 & RT9455_REG_IRQ2_CHTERMI_MASK) {
+ dev_dbg(dev, "Charge terminated\n");
+ alert_userspace = true;
+
+ if (!is_battery_absent) {
+ if ((mask2 & RT9455_REG_MASK2_CHTERMIM_MASK) == 0) {
+ ret = rt9455_write_mask(info, RT9455_REG_MASK2,
+ RT9455_REG_MASK2_CHTERMIM_MASK,
+ RT9455_REG_MASK2_CHTERMIM_SHIFT,
+ 0x01);
+ if (ret) {
+ dev_err(dev, "Failed to mask CHTERMI
interrupt\n");
+ return ret;
+ }
+ }
+ cancel_delayed_work_sync(&info->max_charging_time_work);
+ }
+ }
+ if (irq2 & RT9455_REG_IRQ2_CHRCHGI_MASK) {
+ dev_dbg(dev, "Recharge request\n");
+ ret = rt9455_write_mask(info, RT9455_REG_CTRL7,
+ RT9455_REG_CTRL7_CHG_EN_MASK,
+ RT9455_REG_CTRL7_CHG_EN_SHIFT,
+ 0x01);
+ if (ret) {
+ dev_err(dev, "Failed to enable charging\n");
+ return ret;
+ }
+ if (mask2 & RT9455_REG_MASK2_CHTERMIM_MASK) {
+ ret = rt9455_write_mask(info, RT9455_REG_MASK2,
+ RT9455_REG_MASK2_CHTERMIM_MASK,
+ RT9455_REG_MASK2_CHTERMIM_SHIFT,
+ 0x00);
+ if (ret) {
+ dev_err(dev, "Failed to unmask CHTERMI
interrupt\n");
+ return ret;
+ }
+ }
+ if (!is_battery_absent) {
+ schedule_delayed_work(&info->max_charging_time_work,
+ RT9455_MAX_CHARGING_TIME * HZ);
+ alert_userspace = true;
+ }
+ }
+ if (irq2 & RT9455_REG_IRQ2_CH32MI_MASK) {
+ dev_err(dev, "Charger fault. 32 mins timeout occurred\n");
+ alert_userspace = true;
+ }
+ if (irq2 & RT9455_REG_IRQ2_CHTREGI_MASK) {
+ dev_warn(dev,
+ "Charger warning. Thermal regulation loop active\n");
+ alert_userspace = true;
+ }
+ if (irq2 & RT9455_REG_IRQ2_CHMIVRI_MASK) {
+ dev_dbg(dev,
+ "Charger warning. Input voltage MIVR loop active\n");
+ }
+
+ if (alert_userspace)
+ *_alert_userspace = alert_userspace;
+
+ return 0;
+}
+
+static int rt9455_irq_handler_check_irq3_register(struct rt9455_info *info,
+ bool *_alert_userspace)
+{
+ u8 irq3, mask3;
+ struct device *dev = &info->client->dev;
+ bool alert_userspace = false;
+ int ret;
+
+ ret = rt9455_read(info, RT9455_REG_IRQ3, &irq3);
+ if (ret) {
+ dev_err(dev, "Failed to read IRQ3 register\n");
+ return ret;
+ }
+
+ ret = rt9455_read(info, RT9455_REG_MASK3, &mask3);
+ if (ret) {
+ dev_err(dev, "Failed to read MASK3 register\n");
+ return ret;
+ }
+
+ if (irq3 & RT9455_REG_IRQ3_BSTBUSOVI_MASK) {
+ dev_err(dev, "Boost fault. Overvoltage input occurred\n");
+ alert_userspace = true;
+ }
+ if (irq3 & RT9455_REG_IRQ3_BSTOLI_MASK) {
+ dev_err(dev, "Boost fault. Overload\n");
+ alert_userspace = true;
+ }
+ if (irq3 & RT9455_REG_IRQ3_BSTLOWVI_MASK) {
+ dev_err(dev, "Boost fault. Battery voltage too low\n");
+ alert_userspace = true;
+ }
+ if (irq3 & RT9455_REG_IRQ3_BST32SI_MASK) {
+ dev_err(dev, "Boost fault. 32 seconds timeout occurred.\n");
+ alert_userspace = true;
+ }
+
+ if (alert_userspace) {
+ dev_dbg(dev, "Boost fault occurred, therefore the charger goes
into charge mode\n");
+ ret = rt9455_write_mask(info, RT9455_REG_CTRL2,
+ RT9455_REG_CTRL2_OPA_MODE_MASK,
+ RT9455_REG_CTRL2_OPA_MODE_SHIFT,
+ RT9455_CHARGE_MODE);
+ if (ret) {
+ dev_err(dev, "Failed to set charger in charge mode\n");
+ return ret;
+ }
+ *_alert_userspace = alert_userspace;
+ }
+
+ return 0;
+}
+
+static irqreturn_t rt9455_irq_handler_thread(int irq, void *data)
+{
+ struct rt9455_info *info = data;
+ struct device *dev = &info->client->dev;
+ bool alert_userspace = false;
+ bool is_battery_absent = false;
+ u8 status;
+ int ret;
+
+ ret = rt9455_read_mask(info, RT9455_REG_CTRL1,
+ RT9455_REG_CTRL1_STAT_MASK,
+ RT9455_REG_CTRL1_STAT_SHIFT,
+ &status);
+ if (ret) {
+ dev_err(dev, "Failed to read STAT bits\n");
+ return IRQ_HANDLED;
+ }
+ dev_dbg(dev, "Charger status is %d\n", status);
+
+ /* Each function that processes an IRQ register receives as output
+ * parameter alert_userspace pointer. alert_userspace is set to true
+ * in such a function only if an interrupt has occurred in the
+ * respective interrupt register. This way, we avoid the following
+ * case: interrupt occurs only in IRQ1 register,
+ * rt9455_irq_handler_check_irq1_register() function sets to true
+ * alert_userspace, but rt9455_irq_handler_check_irq2_register()
+ * and rt9455_irq_handler_check_irq3_register() functions set to false
+ * alert_userspace and power_supply_changed() is never called.
+ */
+ ret = rt9455_irq_handler_check_irq1_register(info, &is_battery_absent,
+ &alert_userspace);
+ if (ret) {
+ dev_err(dev, "Failed to handle IRQ1 register\n");
+ return IRQ_HANDLED;
+ }
+
+ ret = rt9455_irq_handler_check_irq2_register(info, is_battery_absent,
+ &alert_userspace);
+ if (ret) {
+ dev_err(dev, "Failed to handle IRQ2 register\n");
+ return IRQ_HANDLED;
+ }
+
+ ret = rt9455_irq_handler_check_irq3_register(info, &alert_userspace);
+ if (ret) {
+ dev_err(dev, "Failed to handle IRQ3 register\n");
+ return IRQ_HANDLED;
+ }
+
+ if (alert_userspace) {
+ /* Sometimes, an interrupt occurs while probe() function is
+ * executing and power_supply_register() is not yet called.
+ * Do not call power_supply_charged() in this case.
+ */
+ if (!IS_ERR_OR_NULL(info->charger))
+ power_supply_changed(info->charger);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int rt9455_setup_irq(struct rt9455_info *info)
+{
+ struct device *dev = &info->client->dev;
+ int ret;
+
+ /* Obtain IRQ GPIO */
+ info->gpiod_irq = devm_gpiod_get_index(dev, RT9455_IRQ_NAME, 0);
+ if (IS_ERR(info->gpiod_irq)) {
+ dev_err(dev, "Failed to get IRQ GPIO\n");
+ return PTR_ERR(info->gpiod_irq);
+ }
+
+ /* Configure IRQ GPIO */
+ ret = gpiod_direction_input(info->gpiod_irq);
+ if (ret) {
+ dev_err(dev, "Failed to set IRQ GPIO direction err = %d\n",
+ ret);
+ return ret;
+ }
+
+ /* Map the pin to an IRQ */
+ ret = gpiod_to_irq(info->gpiod_irq);
+ if (ret < 0) {
+ dev_err(dev, "Failed to associate GPIO with an IRQ err = %d\n",
+ ret);
+ return ret;
+ }
+
+ dev_dbg(dev, "GPIO resource, no:%d irq:%d\n",
+ desc_to_gpio(info->gpiod_irq), ret);
+ info->client->irq = ret;
+ info->gpio_irq = desc_to_gpio(info->gpiod_irq);
+
+ return 0;
+}
+
+static int rt9455_discover_charger(struct rt9455_info *info, u32 *ichrg,
+ u32 *ieoc_percentage, u32 *voreg,
+ u32 *vmivr, u32 *iaicr)
+{
+ struct device *dev = &info->client->dev;
+ int ret;
+
+ if (!dev->of_node && !ACPI_HANDLE(dev)) {
+ dev_err(dev, "No support for either device tree or ACPI\n");
+ return -EINVAL;
+ }
+ /* ICHRG, IEOC_PERCENTAGE and VOREG are mandatory parameters. */
+ ret = device_property_read_u32(dev, "rt,ICHRG", ichrg);
+ if (ret) {
+ dev_err(dev, "Error: missing \"ICHRG\" property\n");
+ return ret;
+ }
+
+ ret = device_property_read_u32(dev, "rt,IEOC_PERCENTAGE",
+ ieoc_percentage);
+ if (ret) {
+ dev_err(dev, "Error: missing \"IEOC_PERCENTAGE\" property\n");
+ return ret;
+ }
+
+ ret = device_property_read_u32(dev, "rt,VOREG", voreg);
+ if (ret) {
+ dev_err(dev, "Error: missing \"VOREG\" property\n");
+ return ret;
+ }
+
+ /* MIVR and IAICR are optional parameters. Do not return error if one
+ * of them is not present in ACPI table or device tree specification,
+ */
+ device_property_read_u32(dev, "rt,VMIVR", vmivr);
+ device_property_read_u32(dev, "rt,IAICR", iaicr);
+
+ ret = rt9455_setup_irq(info);
+ if (ret) {
+ dev_err(dev, "Failed to allocate IRQ resource\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int rt9455_usb_event_none(struct rt9455_info *info,
+ u8 opa_mode, u8 iaicr)
+{
+ struct device *dev = &info->client->dev;
+ int ret;
+
+ if (opa_mode == RT9455_BOOST_MODE) {
+ /* If the charger is in boost mode, and it has received
+ * USB_EVENT_NONE, this means the device powered by the
+ * charger is not connected anymore.
+ * In this case, the charger goes into charge mode.
+ */
+ dev_dbg(dev, "USB_EVENT_NONE received, therefore the charger
goes into charge mode\n");
+ ret = rt9455_write_mask(info, RT9455_REG_CTRL2,
+ RT9455_REG_CTRL2_OPA_MODE_MASK,
+ RT9455_REG_CTRL2_OPA_MODE_SHIFT,
+ RT9455_CHARGE_MODE);
+ if (ret) {
+ dev_err(dev, "Failed to set charger in charge mode\n");
+ return NOTIFY_DONE;
+ }
+ }
+
+ dev_dbg(dev, "USB_EVENT_NONE received, therefore IAICR is set to its
minimum value\n");
+ if (iaicr != RT9455_IAICR_100MA) {
+ ret = rt9455_write_mask(info, RT9455_REG_CTRL2,
+ RT9455_REG_CTRL2_IAICR_MASK,
+ RT9455_REG_CTRL2_IAICR_SHIFT,
+ RT9455_IAICR_100MA);
+ if (ret) {
+ dev_err(dev, "Failed to set IAICR value\n");
+ return NOTIFY_DONE;
+ }
+ }
+
+ return NOTIFY_OK;
+}
+
+static int rt9455_usb_event_vbus(struct rt9455_info *info,
+ u8 opa_mode, u8 iaicr)
+{
+ struct device *dev = &info->client->dev;
+ int ret;
+
+ if (opa_mode == RT9455_BOOST_MODE) {
+ /* If the charger is in boost mode, and it has received
+ * USB_EVENT_VBUS, this means the device powered by the
+ * charger is not connected anymore.
+ * In this case, the charger goes into charge mode.
+ */
+ dev_dbg(dev, "USB_EVENT_VBUS received, therefore the charger
goes into charge mode\n");
+ ret = rt9455_write_mask(info, RT9455_REG_CTRL2,
+ RT9455_REG_CTRL2_OPA_MODE_MASK,
+ RT9455_REG_CTRL2_OPA_MODE_SHIFT,
+ RT9455_CHARGE_MODE);
+ if (ret) {
+ dev_err(dev, "Failed to set charger in charge mode\n");
+ return NOTIFY_DONE;
+ }
+ }
+
+ dev_dbg(dev, "USB_EVENT_VBUS received, therefore IAICR is set to 500
mA\n");
+ if (iaicr != RT9455_IAICR_500MA) {
+ ret = rt9455_write_mask(info, RT9455_REG_CTRL2,
+ RT9455_REG_CTRL2_IAICR_MASK,
+ RT9455_REG_CTRL2_IAICR_SHIFT,
+ RT9455_IAICR_500MA);
+ if (ret) {
+ dev_err(dev, "Failed to set IAICR value\n");
+ return NOTIFY_DONE;
+ }
+ }
+
+ return NOTIFY_OK;
+}
+
+static int rt9455_usb_event_id(struct rt9455_info *info,
+ u8 opa_mode, u8 iaicr)
+{
+ struct device *dev = &info->client->dev;
+ int ret;
+
+ if (opa_mode == RT9455_CHARGE_MODE) {
+ /* If the charger is in charge mode, and it has received
+ * USB_EVENT_ID, this means the device powered by the
+ * charger is not connected anymore.
+ * In this case, the charger goes into charge mode.
+ */
+ dev_dbg(dev, "USB_EVENT_ID received, therefore the charger goes
into boost mode\n");
+ ret = rt9455_write_mask(info, RT9455_REG_CTRL2,
+ RT9455_REG_CTRL2_OPA_MODE_MASK,
+ RT9455_REG_CTRL2_OPA_MODE_SHIFT,
+ RT9455_BOOST_MODE);
+ if (ret) {
+ dev_err(dev, "Failed to set charger in boost mode\n");
+ return NOTIFY_DONE;
+ }
+ }
+
+ dev_dbg(dev, "USB_EVENT_ID received, therefore IAICR is set to its
minimum value\n");
+ if (iaicr != RT9455_IAICR_100MA) {
+ ret = rt9455_write_mask(info, RT9455_REG_CTRL2,
+ RT9455_REG_CTRL2_IAICR_MASK,
+ RT9455_REG_CTRL2_IAICR_SHIFT,
+ RT9455_IAICR_100MA);
+ if (ret) {
+ dev_err(dev, "Failed to set IAICR value\n");
+ return NOTIFY_DONE;
+ }
+ }
+
+ return NOTIFY_OK;
+}
+
+static int rt9455_usb_event_charger(struct rt9455_info *info,
+ u8 opa_mode, u8 iaicr)
+{
+ struct device *dev = &info->client->dev;
+ int ret;
+
+ if (opa_mode == RT9455_BOOST_MODE) {
+ /* If the charger is in boost mode, and it has received
+ * USB_EVENT_CHARGER, this means the device powered by the
+ * charger is not connected anymore.
+ * In this case, the charger goes into charge mode.
+ */
+ dev_dbg(dev, "USB_EVENT_CHARGER received, therefore the charger
goes into charge mode\n");
+ ret = rt9455_write_mask(info, RT9455_REG_CTRL2,
+ RT9455_REG_CTRL2_OPA_MODE_MASK,
+ RT9455_REG_CTRL2_OPA_MODE_SHIFT,
+ RT9455_CHARGE_MODE);
+ if (ret) {
+ dev_err(dev, "Failed to set charger in charge mode\n");
+ return NOTIFY_DONE;
+ }
+ }
+
+ dev_dbg(dev, "USB_EVENT_CHARGER received, therefore IAICR is set to no
current limit\n");
+ if (iaicr != RT9455_IAICR_NO_LIMIT) {
+ ret = rt9455_write_mask(info, RT9455_REG_CTRL2,
+ RT9455_REG_CTRL2_IAICR_MASK,
+ RT9455_REG_CTRL2_IAICR_SHIFT,
+ RT9455_IAICR_NO_LIMIT);
+ if (ret) {
+ dev_err(dev, "Failed to set IAICR value\n");
+ return NOTIFY_DONE;
+ }
+ }
+
+ return NOTIFY_OK;
+}
+
+static int rt9455_usb_event(struct notifier_block *nb,
+ unsigned long event, void *power)
+{
+ struct rt9455_info *info = container_of(nb, struct rt9455_info, nb);
+ struct device *dev = &info->client->dev;
+ u8 opa_mode, iaicr;
+ int ret;
+
+ if (!info)
+ return NOTIFY_DONE;
+
+ /* Determine whether the charger is in charge mode
+ * or in boost mode.
+ */
+ ret = rt9455_read_mask(info, RT9455_REG_CTRL2,
+ RT9455_REG_CTRL2_OPA_MODE_MASK,
+ RT9455_REG_CTRL2_OPA_MODE_SHIFT,
+ &opa_mode);
+ if (ret) {
+ dev_err(dev, "Failed to read operation mode value\n");
+ return NOTIFY_DONE;
+ }
+
+ ret = rt9455_read_mask(info, RT9455_REG_CTRL2,
+ RT9455_REG_CTRL2_IAICR_MASK,
+ RT9455_REG_CTRL2_IAICR_SHIFT,
+ &iaicr);
+ if (ret) {
+ dev_err(dev, "Failed to read IAICR value\n");
+ return NOTIFY_DONE;
+ }
+
+ dev_dbg(dev, "Received USB event %lu\n", event);
+ switch (event) {
+ case USB_EVENT_NONE:
+ return rt9455_usb_event_none(info, opa_mode, iaicr);
+ case USB_EVENT_VBUS:
+ return rt9455_usb_event_vbus(info, opa_mode, iaicr);
+ case USB_EVENT_ID:
+ return rt9455_usb_event_id(info, opa_mode, iaicr);
+ case USB_EVENT_CHARGER:
+ return rt9455_usb_event_charger(info, opa_mode, iaicr);
+ default:
+ dev_err(dev, "Unknown USB event\n");
+ }
+ return NOTIFY_DONE;
+}
+
+static void rt9455_pwr_rdy_work_callback(struct work_struct *work)
+{
+ struct rt9455_info *info = container_of(work, struct rt9455_info,
+ pwr_rdy_work.work);
+ struct device *dev = &info->client->dev;
+ u8 pwr_rdy;
+ int ret;
+
+ ret = rt9455_read_mask(info, RT9455_REG_CTRL1,
+ RT9455_REG_CTRL1_PWR_RDY_MASK,
+ RT9455_REG_CTRL1_PWR_RDY_SHIFT,
+ &pwr_rdy);
+ if (ret) {
+ dev_err(dev, "Failed to read Power Ready bit\n");
+ return;
+ }
+ switch (pwr_rdy) {
+ case RT9455_PWR_FAULT:
+ dev_dbg(dev, "Charger disconnected from power source\n");
+ cancel_delayed_work_sync(&info->max_charging_time_work);
+ break;
+ case RT9455_PWR_GOOD:
+ dev_dbg(dev, "Charger connected to power source\n");
+ ret = rt9455_write_mask(info, RT9455_REG_CTRL7,
+ RT9455_REG_CTRL7_CHG_EN_MASK,
+ RT9455_REG_CTRL7_CHG_EN_SHIFT,
+ RT9455_CHARGE_ENABLE);
+ if (ret) {
+ dev_err(dev, "Failed to enable charging\n");
+ return;
+ }
+ schedule_delayed_work(&info->max_charging_time_work,
+ RT9455_MAX_CHARGING_TIME * HZ);
+ break;
+ }
+}
+
+static void rt9455_max_charging_time_work_callback(struct work_struct *work)
+{
+ struct rt9455_info *info = container_of(work, struct rt9455_info,
+ max_charging_time_work.work);
+ struct device *dev = &info->client->dev;
+ int ret;
+
+ dev_err(dev, "Battery has been charging for at least 6 hours and is not
yet fully charged. Battery is dead, therefore charging is disabled.\n");
+ ret = rt9455_write_mask(info, RT9455_REG_CTRL7,
+ RT9455_REG_CTRL7_CHG_EN_MASK,
+ RT9455_REG_CTRL7_CHG_EN_SHIFT,
+ RT9455_CHARGE_DISABLE);
+ if (ret)
+ dev_err(dev, "Failed to disable charging\n");
+}
+
+static void rt9455_batt_presence_work_callback(struct work_struct *work)
+{
+ struct rt9455_info *info = container_of(work, struct rt9455_info,
+ batt_presence_work.work);
+ struct device *dev = &info->client->dev;
+ u8 irq1;
+ int ret;
+
+ ret = rt9455_read(info, RT9455_REG_IRQ1, &irq1);
+ if (ret) {
+ dev_err(dev, "Failed to read IRQ1 register\n");
+ return;
+ }
+
+ /* If the battery is still absent, batt_presence_work is rescheduled.
+ Otherwise, max_charging_time is scheduled.
+ */
+ if (irq1 & RT9455_REG_IRQ1_BATAB_MASK) {
+ schedule_delayed_work(&info->batt_presence_work,
+ RT9455_BATT_PRESENCE_DELAY * HZ);
+ } else {
+ schedule_delayed_work(&info->max_charging_time_work,
+ RT9455_MAX_CHARGING_TIME * HZ);
+ }
+}
+
+struct power_supply_desc rt9455_charger_desc = {
+ .name = RT9455_DRIVER_NAME,
+ .type = POWER_SUPPLY_TYPE_USB,
+ .properties = rt9455_charger_properties,
+ .num_properties = ARRAY_SIZE(rt9455_charger_properties),
+ .get_property = rt9455_charger_get_property,
+ .set_property = rt9455_charger_set_property,
+ .property_is_writeable = rt9455_charger_property_is_writeable,
+};
+
+static int rt9455_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
+ struct device *dev = &client->dev;
+ struct rt9455_info *info;
+ struct power_supply_config rt9455_charger_config = {};
+ /* mandatory device-specific data values */
+ u32 ichrg, ieoc_percentage, voreg;
+ /* optional device-specific data values */
+ u32 vmivr = -1, iaicr = -1;
+ int ret;
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
+ dev_err(dev, "No support for SMBUS_BYTE_DATA\n");
+ return -ENODEV;
+ }
+ info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ info->client = client;
+ i2c_set_clientdata(client, info);
+
+ ret = rt9455_discover_charger(info, &ichrg, &ieoc_percentage,
+ &voreg, &vmivr, &iaicr);
+ if (ret) {
+ dev_err(dev, "Failed to discover charger\n");
+ return ret;
+ }
+
+#if IS_ENABLED(CONFIG_USB_PHY)
+ info->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2);
+ if (IS_ERR_OR_NULL(info->usb_phy)) {
+ dev_err(dev, "Failed to get USB transceiver\n");
+ } else {
+ info->nb.notifier_call = rt9455_usb_event;
+ ret = usb_register_notifier(info->usb_phy, &info->nb);
+ if (ret) {
+ dev_err(dev, "Failed to register USB notifier\n");
+ usb_put_phy(info->usb_phy);
+ }
+ }
+#endif
+
+ INIT_DELAYED_WORK(&info->pwr_rdy_work, rt9455_pwr_rdy_work_callback);
+ INIT_DELAYED_WORK(&info->max_charging_time_work,
+ rt9455_max_charging_time_work_callback);
+ INIT_DELAYED_WORK(&info->batt_presence_work,
+ rt9455_batt_presence_work_callback);
+
+ rt9455_charger_config.of_node = dev->of_node;
+ rt9455_charger_config.drv_data = info;
+ rt9455_charger_config.supplied_to = rt9455_charger_supplied_to;
+ rt9455_charger_config.num_supplicants =
+ ARRAY_SIZE(rt9455_charger_supplied_to);
+ ret = devm_request_threaded_irq(dev, client->irq, NULL,
+ rt9455_irq_handler_thread,
+ IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+ RT9455_DRIVER_NAME, info);
+ if (ret < 0) {
+ dev_err(dev, "Failed to register IRQ handler\n");
+ return ret;
+ }
+
+ ret = rt9455_hw_init(info, ichrg, ieoc_percentage, voreg, vmivr, iaicr);
+ if (ret) {
+ dev_err(dev, "Failed to set charger to its default values\n");
+ return ret;
+ }
+
+ info->charger = power_supply_register(dev, &rt9455_charger_desc,
+ &rt9455_charger_config);
+ if (IS_ERR_OR_NULL(info->charger)) {
+ dev_err(dev, "Failed to register charger\n");
+ ret = PTR_ERR(info->charger);
+ goto put_usb_phy;
+ }
+
+ return 0;
+
+put_usb_phy:
+#if IS_ENABLED(CONFIG_USB_PHY)
+ if (!IS_ERR_OR_NULL(info->usb_phy)) {
+ usb_unregister_notifier(info->usb_phy, &info->nb);
+ usb_put_phy(info->usb_phy);
+ }
+#endif
+ return ret;
+}
+
+static int rt9455_remove(struct i2c_client *client)
+{
+ int ret;
+ struct rt9455_info *info = i2c_get_clientdata(client);
+
+ ret = rt9455_register_reset(info);
+ if (ret)
+ dev_err(&info->client->dev, "Failed to set charger to its
default values\n");
+
+#if IS_ENABLED(CONFIG_USB_PHY)
+ if (!IS_ERR_OR_NULL(info->usb_phy)) {
+ usb_unregister_notifier(info->usb_phy, &info->nb);
+ usb_put_phy(info->usb_phy);
+ }
+#endif
+
+ cancel_delayed_work_sync(&info->pwr_rdy_work);
+ cancel_delayed_work_sync(&info->max_charging_time_work);
+ cancel_delayed_work_sync(&info->batt_presence_work);
+
+ power_supply_unregister(info->charger);
+
+ return ret;
+}
+
+static const struct i2c_device_id rt9455_i2c_id_table[] = {
+ { RT9455_DRIVER_NAME, 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(i2c, rt9455_i2c_id_table);
+
+static const struct of_device_id rt9455_of_match[] = {
+ { .compatible = "rt,rt9455", },
+ { },
+};
+MODULE_DEVICE_TABLE(of, rt9455_of_match);
+
+static const struct acpi_device_id rt9455_i2c_acpi_match[] = {
+ {"RTK9455", 0},
+ {}
+};
+MODULE_DEVICE_TABLE(acpi, rt9455_i2c_acpi_match);
+
+static struct i2c_driver rt9455_driver = {
+ .probe = rt9455_probe,
+ .remove = rt9455_remove,
+ .id_table = rt9455_i2c_id_table,
+ .driver = {
+ .name = RT9455_DRIVER_NAME,
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(rt9455_of_match),
+ .acpi_match_table = ACPI_PTR(rt9455_i2c_acpi_match),
+ },
+};
+module_i2c_driver(rt9455_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Anda-Maria Nicolae <anda-maria.nico...@intel.com>");
+MODULE_ALIAS("i2c:rt9455-charger");
+MODULE_DESCRIPTION("Richtek RT9455 Charger Driver");
--
1.7.9.5
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