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power: supply: rt9471: Add Richtek RT9471 charger driver
Add support for the RT9471 3A 1-Cell Li+ battery charger. The RT9471 is a highly-integrated 3A switch mode battery charger with low impedance power path to better optimize the charging efficiency. Co-developed-by: Alina Yu <alina_yu@richtek.com> Signed-off-by: Alina Yu <alina_yu@richtek.com> Signed-off-by: ChiYuan Huang <cy_huang@richtek.com> Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
This commit is contained in:
parent
2bc68e5881
commit
4a1a5f6781
@ -793,6 +793,22 @@ config CHARGER_RT9455
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help
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Say Y to enable support for Richtek RT9455 battery charger.
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config CHARGER_RT9471
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tristate "Richtek RT9471 battery charger driver"
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depends on I2C && GPIOLIB && REGULATOR
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select REGMAP_I2C
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select REGMAP_IRQ
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select LINEAR_RANGES
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help
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This adds support for Richtek RT9471 battery charger. RT9471 is
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highly-integrated switch mode battery charger which is system power
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patch manageable device for single cell Li-Ion and Li-polymer battery.
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It can support BC12 detection on DPDM, and current and voltage
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regulation on both charging and boost mode.
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This driver can also be built as a module. If so, the module will be
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called rt9471.
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config CHARGER_CROS_USBPD
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tristate "ChromeOS EC based USBPD charger"
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depends on CROS_USBPD_NOTIFY
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@ -57,6 +57,7 @@ obj-$(CONFIG_BATTERY_MAX1721X) += max1721x_battery.o
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obj-$(CONFIG_BATTERY_Z2) += z2_battery.o
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obj-$(CONFIG_BATTERY_RT5033) += rt5033_battery.o
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obj-$(CONFIG_CHARGER_RT9455) += rt9455_charger.o
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obj-$(CONFIG_CHARGER_RT9471) += rt9471.o
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obj-$(CONFIG_BATTERY_S3C_ADC) += s3c_adc_battery.o
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obj-$(CONFIG_BATTERY_TWL4030_MADC) += twl4030_madc_battery.o
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obj-$(CONFIG_CHARGER_88PM860X) += 88pm860x_charger.o
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931
drivers/power/supply/rt9471.c
Normal file
931
drivers/power/supply/rt9471.c
Normal file
@ -0,0 +1,931 @@
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2022 Richtek Technology Corp.
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*
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* Authors: Alina Yu <alina_yu@richtek.com>
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* ChiYuan Huang <cy_huang@richtek.com>
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*/
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#include <linux/bits.h>
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#include <linux/gpio/consumer.h>
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#include <linux/i2c.h>
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#include <linux/interrupt.h>
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#include <linux/kstrtox.h>
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#include <linux/linear_range.h>
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#include <linux/mod_devicetable.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/of.h>
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#include <linux/power_supply.h>
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#include <linux/regmap.h>
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#include <linux/regulator/driver.h>
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#include <linux/sysfs.h>
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#define RT9471_REG_OTGCFG 0x00
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#define RT9471_REG_TOP 0x01
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#define RT9471_REG_FUNC 0x02
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#define RT9471_REG_IBUS 0x03
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#define RT9471_REG_VBUS 0x04
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#define RT9471_REG_PRECHG 0x05
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#define RT9471_REG_VCHG 0x07
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#define RT9471_REG_ICHG 0x08
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#define RT9471_REG_CHGTMR 0x09
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#define RT9471_REG_EOC 0x0A
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#define RT9471_REG_INFO 0x0B
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#define RT9471_REG_JEITA 0x0C
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#define RT9471_REG_PUMP_EXP 0x0D
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#define RT9471_REG_DPDMDET 0x0E
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#define RT9471_REG_ICSTAT 0x0F
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#define RT9471_REG_STAT0 0x10
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#define RT9471_REG_STAT1 0x11
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#define RT9471_REG_STAT2 0x12
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#define RT9471_REG_IRQ0 0x20
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#define RT9471_REG_MASK0 0x30
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#define RT9471_OTGCV_MASK GENMASK(7, 6)
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#define RT9471_OTGCC_MASK BIT(0)
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#define RT9471_OTGEN_MASK BIT(1)
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#define RT9471_CHGFAULT_MASK GENMASK(4, 1)
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#define RT9471_NUM_IRQ_REGS 4
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#define RT9471_OTGCV_MINUV 4850000
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#define RT9471_OTGCV_STEPUV 150000
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#define RT9471_NUM_VOTG 4
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#define RT9471_VCHG_MAXUV 4700000
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#define RT9471_ICHG_MAXUA 3150000
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/* Device ID */
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#define RT9470_DEVID 0x09
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#define RT9470D_DEVID 0x0A
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#define RT9471_DEVID 0x0D
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#define RT9471D_DEVID 0x0E
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/* IRQ number */
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#define RT9471_IRQ_BC12_DONE 0
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#define RT9471_IRQ_DETACH 1
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#define RT9471_IRQ_RECHG 2
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#define RT9471_IRQ_CHG_DONE 3
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#define RT9471_IRQ_BG_CHG 4
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#define RT9471_IRQ_IE0C 5
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#define RT9471_IRQ_CHG_RDY 6
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#define RT9471_IRQ_VBUS_GD 7
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#define RT9471_IRQ_CHG_BATOV 9
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#define RT9471_IRQ_CHG_SYSOV 10
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#define RT9471_IRQ_CHG_TOUT 11
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#define RT9471_IRQ_CHG_BUSUV 12
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#define RT9471_IRQ_CHG_THREG 13
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#define RT9471_IRQ_CHG_AICR 14
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#define RT9471_IRQ_CHG_MIVR 15
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#define RT9471_IRQ_SYS_SHORT 16
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#define RT9471_IRQ_SYS_MIN 17
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#define RT9471_IRQ_AICC_DONE 18
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#define RT9471_IRQ_PE_DONE 19
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#define RT9471_IRQ_JEITA_COLD 20
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#define RT9471_IRQ_JEITA_COOL 21
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#define RT9471_IRQ_JEITA_WARM 22
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#define RT9471_IRQ_JEITA_HOT 23
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#define RT9471_IRQ_OTG_FAULT 24
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#define RT9471_IRQ_OTG_LBP 25
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#define RT9471_IRQ_OTG_CC 26
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#define RT9471_IRQ_WDT 29
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#define RT9471_IRQ_VAC_OV 30
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#define RT9471_IRQ_OTP 31
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enum rt9471_fields {
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F_WDT = 0,
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F_WDT_RST,
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F_CHG_EN,
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F_HZ,
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F_BATFET_DIS,
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F_AICR,
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F_AICC_EN,
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F_MIVR,
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F_IPRE_CHG,
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F_VPRE_CHG,
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F_VBAT_REG,
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F_ICHG_REG,
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F_EOC_RST,
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F_TE,
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F_IEOC_CHG,
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F_DEVICE_ID,
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F_REG_RST,
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F_BC12_EN,
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F_IC_STAT,
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F_PORT_STAT,
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F_ST_CHG_DONE,
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F_ST_CHG_RDY,
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F_ST_VBUS_GD,
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F_MAX_FIELDS
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};
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enum rt9471_ranges {
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RT9471_RANGE_AICR = 0,
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RT9471_RANGE_MIVR,
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RT9471_RANGE_IPRE,
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RT9471_RANGE_VCHG,
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RT9471_RANGE_ICHG,
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RT9471_RANGE_IEOC,
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RT9471_MAX_RANGES
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};
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enum {
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RT9471_PORTSTAT_APPLE_10W = 8,
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RT9471_PORTSTAT_SAMSUNG_10W,
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RT9471_PORTSTAT_APPLE_5W,
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RT9471_PORTSTAT_APPLE_12W,
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RT9471_PORTSTAT_NSTD,
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RT9471_PORTSTAT_SDP,
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RT9471_PORTSTAT_CDP,
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RT9471_PORTSTAT_DCP,
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};
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struct rt9471_chip {
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struct device *dev;
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struct gpio_desc *ce_gpio;
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struct regmap *regmap;
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struct regmap_field *rm_fields[F_MAX_FIELDS];
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struct regmap_irq_chip_data *irq_chip_data;
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struct regulator_dev *otg_rdev;
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struct power_supply *psy;
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struct power_supply_desc psy_desc;
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struct mutex var_lock;
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enum power_supply_usb_type psy_usb_type;
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int psy_usb_curr;
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};
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static const struct reg_field rt9471_reg_fields[F_MAX_FIELDS] = {
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[F_WDT] = REG_FIELD(RT9471_REG_TOP, 0, 0),
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[F_WDT_RST] = REG_FIELD(RT9471_REG_TOP, 1, 1),
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[F_CHG_EN] = REG_FIELD(RT9471_REG_FUNC, 0, 0),
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[F_HZ] = REG_FIELD(RT9471_REG_FUNC, 5, 5),
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[F_BATFET_DIS] = REG_FIELD(RT9471_REG_FUNC, 7, 7),
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[F_AICR] = REG_FIELD(RT9471_REG_IBUS, 0, 5),
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[F_AICC_EN] = REG_FIELD(RT9471_REG_IBUS, 7, 7),
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[F_MIVR] = REG_FIELD(RT9471_REG_VBUS, 0, 3),
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[F_IPRE_CHG] = REG_FIELD(RT9471_REG_PRECHG, 0, 3),
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[F_VPRE_CHG] = REG_FIELD(RT9471_REG_PRECHG, 4, 6),
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[F_VBAT_REG] = REG_FIELD(RT9471_REG_VCHG, 0, 6),
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[F_ICHG_REG] = REG_FIELD(RT9471_REG_ICHG, 0, 5),
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[F_EOC_RST] = REG_FIELD(RT9471_REG_EOC, 0, 0),
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[F_TE] = REG_FIELD(RT9471_REG_EOC, 1, 1),
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[F_IEOC_CHG] = REG_FIELD(RT9471_REG_EOC, 4, 7),
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[F_DEVICE_ID] = REG_FIELD(RT9471_REG_INFO, 3, 6),
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[F_REG_RST] = REG_FIELD(RT9471_REG_INFO, 7, 7),
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[F_BC12_EN] = REG_FIELD(RT9471_REG_DPDMDET, 7, 7),
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[F_IC_STAT] = REG_FIELD(RT9471_REG_ICSTAT, 0, 3),
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[F_PORT_STAT] = REG_FIELD(RT9471_REG_ICSTAT, 4, 7),
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[F_ST_CHG_DONE] = REG_FIELD(RT9471_REG_STAT0, 3, 3),
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[F_ST_CHG_RDY] = REG_FIELD(RT9471_REG_STAT0, 6, 6),
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[F_ST_VBUS_GD] = REG_FIELD(RT9471_REG_STAT0, 7, 7),
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};
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static const struct linear_range rt9471_chg_ranges[RT9471_MAX_RANGES] = {
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[RT9471_RANGE_AICR] = { .min = 50000, .min_sel = 1, .max_sel = 63, .step = 50000 },
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[RT9471_RANGE_MIVR] = { .min = 3900000, .min_sel = 0, .max_sel = 15, .step = 100000 },
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[RT9471_RANGE_IPRE] = { .min = 50000, .min_sel = 0, .max_sel = 15, .step = 50000 },
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[RT9471_RANGE_VCHG] = { .min = 3900000, .min_sel = 0, .max_sel = 80, .step = 10000 },
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[RT9471_RANGE_ICHG] = { .min = 0, .min_sel = 0, .max_sel = 63, .step = 50000 },
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[RT9471_RANGE_IEOC] = { .min = 50000, .min_sel = 0, .max_sel = 15, .step = 50000 },
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};
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static int rt9471_set_value_by_field_range(struct rt9471_chip *chip,
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enum rt9471_fields field,
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enum rt9471_ranges range, int val)
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{
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unsigned int sel;
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if (val < 0)
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return -EINVAL;
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linear_range_get_selector_within(rt9471_chg_ranges + range, val, &sel);
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return regmap_field_write(chip->rm_fields[field], sel);
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}
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static int rt9471_get_value_by_field_range(struct rt9471_chip *chip,
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enum rt9471_fields field,
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enum rt9471_ranges range, int *val)
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{
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unsigned int sel, rvalue;
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int ret;
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ret = regmap_field_read(chip->rm_fields[field], &sel);
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if (ret)
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return ret;
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ret = linear_range_get_value(rt9471_chg_ranges + range, sel, &rvalue);
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if (ret)
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return ret;
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*val = rvalue;
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return 0;
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}
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static int rt9471_set_ieoc(struct rt9471_chip *chip, int microamp)
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{
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int ret;
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if (microamp == 0)
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return regmap_field_write(chip->rm_fields[F_TE], 0);
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ret = rt9471_set_value_by_field_range(chip, F_IEOC_CHG, RT9471_RANGE_IEOC, microamp);
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if (ret)
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return ret;
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/* After applying the new IEOC value, enable charge termination */
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return regmap_field_write(chip->rm_fields[F_TE], 1);
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}
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static int rt9471_get_ieoc(struct rt9471_chip *chip, int *microamp)
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{
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unsigned int chg_term_enable;
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int ret;
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ret = regmap_field_read(chip->rm_fields[F_TE], &chg_term_enable);
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if (ret)
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return ret;
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if (!chg_term_enable) {
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*microamp = 0;
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return 0;
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}
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return rt9471_get_value_by_field_range(chip, F_IEOC_CHG, RT9471_RANGE_IEOC, microamp);
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}
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static int rt9471_get_status(struct rt9471_chip *chip, int *status)
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{
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unsigned int chg_ready, chg_done, fault_stat;
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int ret;
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ret = regmap_field_read(chip->rm_fields[F_ST_CHG_RDY], &chg_ready);
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if (ret)
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return ret;
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ret = regmap_field_read(chip->rm_fields[F_ST_CHG_DONE], &chg_done);
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if (ret)
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return ret;
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ret = regmap_read(chip->regmap, RT9471_REG_STAT1, &fault_stat);
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if (ret)
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return ret;
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fault_stat &= RT9471_CHGFAULT_MASK;
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if (chg_ready && chg_done)
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*status = POWER_SUPPLY_STATUS_FULL;
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else if (chg_ready && fault_stat)
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*status = POWER_SUPPLY_STATUS_NOT_CHARGING;
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else if (chg_ready && !fault_stat)
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*status = POWER_SUPPLY_STATUS_CHARGING;
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else
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*status = POWER_SUPPLY_STATUS_DISCHARGING;
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return 0;
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}
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static int rt9471_get_vbus_good(struct rt9471_chip *chip, int *stat)
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{
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unsigned int vbus_gd;
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int ret;
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ret = regmap_field_read(chip->rm_fields[F_ST_VBUS_GD], &vbus_gd);
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if (ret)
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return ret;
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*stat = vbus_gd;
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return 0;
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}
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static int rt9471_get_usb_type(struct rt9471_chip *chip, int *usb_type)
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{
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mutex_lock(&chip->var_lock);
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*usb_type = chip->psy_usb_type;
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mutex_unlock(&chip->var_lock);
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return 0;
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}
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static int rt9471_get_usb_type_current(struct rt9471_chip *chip,
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int *microamp)
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{
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mutex_lock(&chip->var_lock);
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*microamp = chip->psy_usb_curr;
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mutex_unlock(&chip->var_lock);
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return 0;
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}
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static enum power_supply_property rt9471_charger_properties[] = {
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POWER_SUPPLY_PROP_STATUS,
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POWER_SUPPLY_PROP_ONLINE,
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POWER_SUPPLY_PROP_CURRENT_MAX,
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POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
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POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
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POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
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POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
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POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
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POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT,
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POWER_SUPPLY_PROP_USB_TYPE,
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POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
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POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
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POWER_SUPPLY_PROP_MODEL_NAME,
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POWER_SUPPLY_PROP_MANUFACTURER,
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};
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static enum power_supply_usb_type rt9471_charger_usb_types[] = {
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POWER_SUPPLY_USB_TYPE_UNKNOWN,
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POWER_SUPPLY_USB_TYPE_SDP,
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POWER_SUPPLY_USB_TYPE_DCP,
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POWER_SUPPLY_USB_TYPE_CDP,
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POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID,
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};
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static int rt9471_charger_property_is_writeable(struct power_supply *psy,
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enum power_supply_property psp)
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{
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switch (psp) {
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case POWER_SUPPLY_PROP_STATUS:
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case POWER_SUPPLY_PROP_ONLINE:
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case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
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case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
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case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
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case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
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case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
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case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
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return 1;
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default:
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return 0;
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}
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}
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static int rt9471_charger_set_property(struct power_supply *psy,
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enum power_supply_property psp,
|
||||
const union power_supply_propval *val)
|
||||
{
|
||||
struct rt9471_chip *chip = power_supply_get_drvdata(psy);
|
||||
int value = val->intval;
|
||||
|
||||
switch (psp) {
|
||||
case POWER_SUPPLY_PROP_STATUS:
|
||||
return regmap_field_write(chip->rm_fields[F_CHG_EN], !!value);
|
||||
case POWER_SUPPLY_PROP_ONLINE:
|
||||
return regmap_field_write(chip->rm_fields[F_HZ], !value);
|
||||
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
|
||||
return rt9471_set_value_by_field_range(chip, F_ICHG_REG, RT9471_RANGE_ICHG, value);
|
||||
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
|
||||
return rt9471_set_value_by_field_range(chip, F_VBAT_REG, RT9471_RANGE_VCHG, value);
|
||||
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
|
||||
return rt9471_set_value_by_field_range(chip, F_AICR, RT9471_RANGE_AICR, value);
|
||||
case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
|
||||
return rt9471_set_value_by_field_range(chip, F_MIVR, RT9471_RANGE_MIVR, value);
|
||||
case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
|
||||
return rt9471_set_value_by_field_range(chip, F_IPRE_CHG, RT9471_RANGE_IPRE, value);
|
||||
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
|
||||
return rt9471_set_ieoc(chip, val->intval);
|
||||
default:
|
||||
return -EINVAL;
|
||||
}
|
||||
}
|
||||
|
||||
static const char * const rt9471_manufacturer = "Richtek Technology Corp.";
|
||||
static const char * const rt9471_model = "RT9471";
|
||||
|
||||
static int rt9471_charger_get_property(struct power_supply *psy,
|
||||
enum power_supply_property psp,
|
||||
union power_supply_propval *val)
|
||||
{
|
||||
struct rt9471_chip *chip = power_supply_get_drvdata(psy);
|
||||
int *pvalue = &val->intval;
|
||||
|
||||
switch (psp) {
|
||||
case POWER_SUPPLY_PROP_STATUS:
|
||||
return rt9471_get_status(chip, pvalue);
|
||||
case POWER_SUPPLY_PROP_ONLINE:
|
||||
return rt9471_get_vbus_good(chip, pvalue);
|
||||
case POWER_SUPPLY_PROP_CURRENT_MAX:
|
||||
return rt9471_get_usb_type_current(chip, pvalue);
|
||||
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
|
||||
return rt9471_get_value_by_field_range(chip, F_ICHG_REG, RT9471_RANGE_ICHG, pvalue);
|
||||
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
|
||||
*pvalue = RT9471_ICHG_MAXUA;
|
||||
return 0;
|
||||
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
|
||||
return rt9471_get_value_by_field_range(chip, F_VBAT_REG, RT9471_RANGE_VCHG, pvalue);
|
||||
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
|
||||
val->intval = RT9471_VCHG_MAXUV;
|
||||
return 0;
|
||||
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
|
||||
return rt9471_get_value_by_field_range(chip, F_AICR, RT9471_RANGE_AICR, pvalue);
|
||||
case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
|
||||
return rt9471_get_value_by_field_range(chip, F_MIVR, RT9471_RANGE_MIVR, pvalue);
|
||||
case POWER_SUPPLY_PROP_USB_TYPE:
|
||||
return rt9471_get_usb_type(chip, pvalue);
|
||||
case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
|
||||
return rt9471_get_value_by_field_range(chip, F_IPRE_CHG, RT9471_RANGE_IPRE, pvalue);
|
||||
case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
|
||||
return rt9471_get_ieoc(chip, pvalue);
|
||||
case POWER_SUPPLY_PROP_MODEL_NAME:
|
||||
val->strval = rt9471_model;
|
||||
return 0;
|
||||
case POWER_SUPPLY_PROP_MANUFACTURER:
|
||||
val->strval = rt9471_manufacturer;
|
||||
return 0;
|
||||
default:
|
||||
return -ENODATA;
|
||||
}
|
||||
}
|
||||
|
||||
static irqreturn_t rt9471_vbus_gd_handler(int irqno, void *devid)
|
||||
{
|
||||
struct rt9471_chip *chip = devid;
|
||||
|
||||
power_supply_changed(chip->psy);
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static irqreturn_t rt9471_detach_handler(int irqno, void *devid)
|
||||
{
|
||||
struct rt9471_chip *chip = devid;
|
||||
unsigned int vbus_gd;
|
||||
int ret;
|
||||
|
||||
ret = regmap_field_read(chip->rm_fields[F_ST_VBUS_GD], &vbus_gd);
|
||||
if (ret)
|
||||
return IRQ_NONE;
|
||||
|
||||
/* Only focus on really detached */
|
||||
if (vbus_gd)
|
||||
return IRQ_HANDLED;
|
||||
|
||||
mutex_lock(&chip->var_lock);
|
||||
chip->psy_usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
|
||||
chip->psy_usb_curr = 0;
|
||||
mutex_unlock(&chip->var_lock);
|
||||
|
||||
power_supply_changed(chip->psy);
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static irqreturn_t rt9471_bc12_done_handler(int irqno, void *devid)
|
||||
{
|
||||
struct rt9471_chip *chip = devid;
|
||||
enum power_supply_usb_type usb_type;
|
||||
unsigned int port_stat;
|
||||
int usb_curr, ret;
|
||||
|
||||
ret = regmap_field_read(chip->rm_fields[F_PORT_STAT], &port_stat);
|
||||
if (ret)
|
||||
return IRQ_NONE;
|
||||
|
||||
switch (port_stat) {
|
||||
case RT9471_PORTSTAT_APPLE_10W:
|
||||
usb_type = POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID;
|
||||
usb_curr = 2000000;
|
||||
break;
|
||||
case RT9471_PORTSTAT_APPLE_5W:
|
||||
usb_type = POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID;
|
||||
usb_curr = 1000000;
|
||||
break;
|
||||
case RT9471_PORTSTAT_APPLE_12W:
|
||||
usb_type = POWER_SUPPLY_USB_TYPE_APPLE_BRICK_ID;
|
||||
usb_curr = 2400000;
|
||||
break;
|
||||
case RT9471_PORTSTAT_SAMSUNG_10W:
|
||||
usb_type = POWER_SUPPLY_USB_TYPE_DCP;
|
||||
usb_curr = 2000000;
|
||||
break;
|
||||
case RT9471_PORTSTAT_DCP:
|
||||
usb_type = POWER_SUPPLY_USB_TYPE_DCP;
|
||||
usb_curr = 1500000;
|
||||
break;
|
||||
case RT9471_PORTSTAT_NSTD:
|
||||
case RT9471_PORTSTAT_SDP:
|
||||
usb_type = POWER_SUPPLY_USB_TYPE_SDP;
|
||||
usb_curr = 500000;
|
||||
break;
|
||||
case RT9471_PORTSTAT_CDP:
|
||||
usb_type = POWER_SUPPLY_USB_TYPE_CDP;
|
||||
usb_curr = 1500000;
|
||||
break;
|
||||
default:
|
||||
usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;
|
||||
usb_curr = 0;
|
||||
break;
|
||||
}
|
||||
|
||||
mutex_lock(&chip->var_lock);
|
||||
chip->psy_usb_type = usb_type;
|
||||
chip->psy_usb_curr = usb_curr;
|
||||
mutex_unlock(&chip->var_lock);
|
||||
|
||||
power_supply_changed(chip->psy);
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static irqreturn_t rt9471_wdt_handler(int irqno, void *devid)
|
||||
{
|
||||
struct rt9471_chip *chip = devid;
|
||||
int ret;
|
||||
|
||||
ret = regmap_field_write(chip->rm_fields[F_WDT_RST], 1);
|
||||
|
||||
return ret ? IRQ_NONE : IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static irqreturn_t rt9471_otg_fault_handler(int irqno, void *devid)
|
||||
{
|
||||
struct rt9471_chip *chip = devid;
|
||||
|
||||
regulator_notifier_call_chain(chip->otg_rdev, REGULATOR_EVENT_FAIL, NULL);
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
#define RT9471_IRQ_DESC(_name, _hwirq) \
|
||||
{ \
|
||||
.name = #_name, \
|
||||
.hwirq = _hwirq, \
|
||||
.handler = rt9471_##_name##_handler, \
|
||||
}
|
||||
|
||||
static int rt9471_register_interrupts(struct rt9471_chip *chip)
|
||||
{
|
||||
struct device *dev = chip->dev;
|
||||
static const struct {
|
||||
char *name;
|
||||
int hwirq;
|
||||
irq_handler_t handler;
|
||||
} chg_irqs[] = {
|
||||
RT9471_IRQ_DESC(vbus_gd, RT9471_IRQ_VBUS_GD),
|
||||
RT9471_IRQ_DESC(detach, RT9471_IRQ_DETACH),
|
||||
RT9471_IRQ_DESC(bc12_done, RT9471_IRQ_BC12_DONE),
|
||||
RT9471_IRQ_DESC(wdt, RT9471_IRQ_WDT),
|
||||
RT9471_IRQ_DESC(otg_fault, RT9471_IRQ_OTG_FAULT),
|
||||
}, *curr;
|
||||
int i, virq, ret;
|
||||
|
||||
for (i = 0; i < ARRAY_SIZE(chg_irqs); i++) {
|
||||
curr = chg_irqs + i;
|
||||
|
||||
virq = regmap_irq_get_virq(chip->irq_chip_data, curr->hwirq);
|
||||
if (virq <= 0)
|
||||
return virq;
|
||||
|
||||
ret = devm_request_threaded_irq(dev, virq, NULL, curr->handler,
|
||||
IRQF_ONESHOT, curr->name, chip);
|
||||
if (ret)
|
||||
return dev_err_probe(dev, ret, "Failed to register IRQ (%s)\n",
|
||||
curr->name);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct regulator_ops rt9471_otg_ops = {
|
||||
.enable = regulator_enable_regmap,
|
||||
.disable = regulator_disable_regmap,
|
||||
.is_enabled = regulator_is_enabled_regmap,
|
||||
.list_voltage = regulator_list_voltage_linear,
|
||||
.get_voltage_sel = regulator_get_voltage_sel_regmap,
|
||||
.set_voltage_sel = regulator_set_voltage_sel_regmap,
|
||||
.set_current_limit = regulator_set_current_limit_regmap,
|
||||
.get_current_limit = regulator_get_current_limit_regmap,
|
||||
};
|
||||
|
||||
static const unsigned int rt9471_otg_microamp[] = { 500000, 1200000, };
|
||||
|
||||
static const struct regulator_desc rt9471_otg_rdesc = {
|
||||
.of_match = of_match_ptr("usb-otg-vbus-regulator"),
|
||||
.name = "rt9471-otg-vbus",
|
||||
.owner = THIS_MODULE,
|
||||
.type = REGULATOR_VOLTAGE,
|
||||
.ops = &rt9471_otg_ops,
|
||||
.min_uV = RT9471_OTGCV_MINUV,
|
||||
.uV_step = RT9471_OTGCV_STEPUV,
|
||||
.n_voltages = RT9471_NUM_VOTG,
|
||||
.curr_table = rt9471_otg_microamp,
|
||||
.n_current_limits = ARRAY_SIZE(rt9471_otg_microamp),
|
||||
.enable_mask = RT9471_OTGEN_MASK,
|
||||
.enable_reg = RT9471_REG_FUNC,
|
||||
.vsel_reg = RT9471_REG_OTGCFG,
|
||||
.vsel_mask = RT9471_OTGCV_MASK,
|
||||
.csel_reg = RT9471_REG_OTGCFG,
|
||||
.csel_mask = RT9471_OTGCC_MASK,
|
||||
};
|
||||
|
||||
static int rt9471_register_otg_regulator(struct rt9471_chip *chip)
|
||||
{
|
||||
struct device *dev = chip->dev;
|
||||
struct regulator_config cfg = { .dev = dev, .driver_data = chip };
|
||||
|
||||
chip->otg_rdev = devm_regulator_register(dev, &rt9471_otg_rdesc, &cfg);
|
||||
|
||||
return PTR_ERR_OR_ZERO(chip->otg_rdev);
|
||||
}
|
||||
|
||||
static inline struct rt9471_chip *psy_device_to_chip(struct device *dev)
|
||||
{
|
||||
return power_supply_get_drvdata(to_power_supply(dev));
|
||||
}
|
||||
|
||||
static ssize_t sysoff_enable_show(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
struct rt9471_chip *chip = psy_device_to_chip(dev);
|
||||
unsigned int sysoff_enable;
|
||||
int ret;
|
||||
|
||||
ret = regmap_field_read(chip->rm_fields[F_BATFET_DIS], &sysoff_enable);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
return sysfs_emit(buf, "%d\n", sysoff_enable);
|
||||
}
|
||||
|
||||
static ssize_t sysoff_enable_store(struct device *dev,
|
||||
struct device_attribute *attr,
|
||||
const char *buf, size_t count)
|
||||
{
|
||||
struct rt9471_chip *chip = psy_device_to_chip(dev);
|
||||
unsigned int tmp;
|
||||
int ret;
|
||||
|
||||
ret = kstrtouint(buf, 10, &tmp);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
ret = regmap_field_write(chip->rm_fields[F_BATFET_DIS], !!tmp);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
return count;
|
||||
}
|
||||
|
||||
static ssize_t port_detect_enable_show(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
struct rt9471_chip *chip = psy_device_to_chip(dev);
|
||||
unsigned int bc12_enable;
|
||||
int ret;
|
||||
|
||||
ret = regmap_field_read(chip->rm_fields[F_BC12_EN], &bc12_enable);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
return sysfs_emit(buf, "%d\n", bc12_enable);
|
||||
}
|
||||
|
||||
static ssize_t port_detect_enable_store(struct device *dev,
|
||||
struct device_attribute *attr,
|
||||
const char *buf, size_t count)
|
||||
{
|
||||
struct rt9471_chip *chip = psy_device_to_chip(dev);
|
||||
unsigned int tmp;
|
||||
int ret;
|
||||
|
||||
ret = kstrtouint(buf, 10, &tmp);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
ret = regmap_field_write(chip->rm_fields[F_BC12_EN], !!tmp);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
return count;
|
||||
}
|
||||
|
||||
static DEVICE_ATTR_RW(sysoff_enable);
|
||||
static DEVICE_ATTR_RW(port_detect_enable);
|
||||
|
||||
static struct attribute *rt9471_sysfs_attrs[] = {
|
||||
&dev_attr_sysoff_enable.attr,
|
||||
&dev_attr_port_detect_enable.attr,
|
||||
NULL
|
||||
};
|
||||
|
||||
ATTRIBUTE_GROUPS(rt9471_sysfs);
|
||||
|
||||
static int rt9471_register_psy(struct rt9471_chip *chip)
|
||||
{
|
||||
struct device *dev = chip->dev;
|
||||
struct power_supply_desc *desc = &chip->psy_desc;
|
||||
struct power_supply_config cfg = {};
|
||||
char *psy_name;
|
||||
|
||||
cfg.drv_data = chip;
|
||||
cfg.of_node = dev->of_node;
|
||||
cfg.attr_grp = rt9471_sysfs_groups;
|
||||
|
||||
psy_name = devm_kasprintf(dev, GFP_KERNEL, "rt9471-%s", dev_name(dev));
|
||||
if (!psy_name)
|
||||
return -ENOMEM;
|
||||
|
||||
desc->name = psy_name;
|
||||
desc->type = POWER_SUPPLY_TYPE_USB;
|
||||
desc->usb_types = rt9471_charger_usb_types;
|
||||
desc->num_usb_types = ARRAY_SIZE(rt9471_charger_usb_types);
|
||||
desc->properties = rt9471_charger_properties;
|
||||
desc->num_properties = ARRAY_SIZE(rt9471_charger_properties);
|
||||
desc->get_property = rt9471_charger_get_property;
|
||||
desc->set_property = rt9471_charger_set_property;
|
||||
desc->property_is_writeable = rt9471_charger_property_is_writeable;
|
||||
|
||||
chip->psy = devm_power_supply_register(dev, desc, &cfg);
|
||||
|
||||
return PTR_ERR_OR_ZERO(chip->psy);
|
||||
}
|
||||
|
||||
static const struct regmap_irq rt9471_regmap_irqs[] = {
|
||||
REGMAP_IRQ_REG_LINE(RT9471_IRQ_BC12_DONE, 8),
|
||||
REGMAP_IRQ_REG_LINE(RT9471_IRQ_DETACH, 8),
|
||||
REGMAP_IRQ_REG_LINE(RT9471_IRQ_RECHG, 8),
|
||||
REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_DONE, 8),
|
||||
REGMAP_IRQ_REG_LINE(RT9471_IRQ_BG_CHG, 8),
|
||||
REGMAP_IRQ_REG_LINE(RT9471_IRQ_IE0C, 8),
|
||||
REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_RDY, 8),
|
||||
REGMAP_IRQ_REG_LINE(RT9471_IRQ_VBUS_GD, 8),
|
||||
REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_BATOV, 8),
|
||||
REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_SYSOV, 8),
|
||||
REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_TOUT, 8),
|
||||
REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_BUSUV, 8),
|
||||
REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_THREG, 8),
|
||||
REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_AICR, 8),
|
||||
REGMAP_IRQ_REG_LINE(RT9471_IRQ_CHG_MIVR, 8),
|
||||
REGMAP_IRQ_REG_LINE(RT9471_IRQ_SYS_SHORT, 8),
|
||||
REGMAP_IRQ_REG_LINE(RT9471_IRQ_SYS_MIN, 8),
|
||||
REGMAP_IRQ_REG_LINE(RT9471_IRQ_AICC_DONE, 8),
|
||||
REGMAP_IRQ_REG_LINE(RT9471_IRQ_PE_DONE, 8),
|
||||
REGMAP_IRQ_REG_LINE(RT9471_IRQ_JEITA_COLD, 8),
|
||||
REGMAP_IRQ_REG_LINE(RT9471_IRQ_JEITA_COOL, 8),
|
||||
REGMAP_IRQ_REG_LINE(RT9471_IRQ_JEITA_WARM, 8),
|
||||
REGMAP_IRQ_REG_LINE(RT9471_IRQ_JEITA_HOT, 8),
|
||||
REGMAP_IRQ_REG_LINE(RT9471_IRQ_OTG_FAULT, 8),
|
||||
REGMAP_IRQ_REG_LINE(RT9471_IRQ_OTG_LBP, 8),
|
||||
REGMAP_IRQ_REG_LINE(RT9471_IRQ_OTG_CC, 8),
|
||||
REGMAP_IRQ_REG_LINE(RT9471_IRQ_WDT, 8),
|
||||
REGMAP_IRQ_REG_LINE(RT9471_IRQ_VAC_OV, 8),
|
||||
REGMAP_IRQ_REG_LINE(RT9471_IRQ_OTP, 8),
|
||||
};
|
||||
|
||||
static const struct regmap_irq_chip rt9471_irq_chip = {
|
||||
.name = "rt9471-irqs",
|
||||
.status_base = RT9471_REG_IRQ0,
|
||||
.mask_base = RT9471_REG_MASK0,
|
||||
.num_regs = RT9471_NUM_IRQ_REGS,
|
||||
.irqs = rt9471_regmap_irqs,
|
||||
.num_irqs = ARRAY_SIZE(rt9471_regmap_irqs),
|
||||
};
|
||||
|
||||
static const struct reg_sequence rt9471_init_regs[] = {
|
||||
REG_SEQ0(RT9471_REG_INFO, 0x80), /* REG_RST */
|
||||
REG_SEQ0(RT9471_REG_TOP, 0xC0), /* WDT = 0 */
|
||||
REG_SEQ0(RT9471_REG_FUNC, 0x01), /* BATFET_DIS_DLY = 0 */
|
||||
REG_SEQ0(RT9471_REG_IBUS, 0x0A), /* AUTO_AICR = 0 */
|
||||
REG_SEQ0(RT9471_REG_VBUS, 0xC6), /* VAC_OVP = 14V */
|
||||
REG_SEQ0(RT9471_REG_JEITA, 0x38), /* JEITA = 0 */
|
||||
REG_SEQ0(RT9471_REG_DPDMDET, 0x31), /* BC12_EN = 0, DCP_DP_OPT = 1 */
|
||||
};
|
||||
|
||||
static int rt9471_check_devinfo(struct rt9471_chip *chip)
|
||||
{
|
||||
struct device *dev = chip->dev;
|
||||
unsigned int dev_id;
|
||||
int ret;
|
||||
|
||||
ret = regmap_field_read(chip->rm_fields[F_DEVICE_ID], &dev_id);
|
||||
if (ret)
|
||||
return dev_err_probe(dev, ret, "Failed to read device_id\n");
|
||||
|
||||
switch (dev_id) {
|
||||
case RT9470_DEVID:
|
||||
case RT9470D_DEVID:
|
||||
case RT9471_DEVID:
|
||||
case RT9471D_DEVID:
|
||||
return 0;
|
||||
default:
|
||||
return dev_err_probe(dev, -ENODEV, "Incorrect device id\n");
|
||||
}
|
||||
}
|
||||
|
||||
static bool rt9471_accessible_reg(struct device *dev, unsigned int reg)
|
||||
{
|
||||
switch (reg) {
|
||||
case 0x00 ... 0x0F:
|
||||
case 0x10 ... 0x13:
|
||||
case 0x20 ... 0x33:
|
||||
case 0x40 ... 0xA1:
|
||||
return true;
|
||||
default:
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
static const struct regmap_config rt9471_regmap_config = {
|
||||
.reg_bits = 8,
|
||||
.val_bits = 8,
|
||||
.max_register = 0xA1,
|
||||
.writeable_reg = rt9471_accessible_reg,
|
||||
.readable_reg = rt9471_accessible_reg,
|
||||
};
|
||||
|
||||
static int rt9471_probe(struct i2c_client *i2c)
|
||||
{
|
||||
struct device *dev = &i2c->dev;
|
||||
struct rt9471_chip *chip;
|
||||
struct gpio_desc *ce_gpio;
|
||||
struct regmap *regmap;
|
||||
int ret;
|
||||
|
||||
chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
|
||||
if (!chip)
|
||||
return -ENOMEM;
|
||||
|
||||
chip->dev = dev;
|
||||
mutex_init(&chip->var_lock);
|
||||
i2c_set_clientdata(i2c, chip);
|
||||
|
||||
/* Default pull charge enable gpio to make 'CHG_EN' by SW control only */
|
||||
ce_gpio = devm_gpiod_get_optional(dev, "charge-enable", GPIOD_OUT_HIGH);
|
||||
if (IS_ERR(chip->ce_gpio))
|
||||
return dev_err_probe(dev, PTR_ERR(ce_gpio),
|
||||
"Failed to config charge enable gpio\n");
|
||||
|
||||
regmap = devm_regmap_init_i2c(i2c, &rt9471_regmap_config);
|
||||
if (IS_ERR(regmap))
|
||||
return dev_err_probe(dev, PTR_ERR(regmap), "Failed to init regmap\n");
|
||||
|
||||
chip->regmap = regmap;
|
||||
|
||||
ret = devm_regmap_field_bulk_alloc(dev, regmap, chip->rm_fields,
|
||||
rt9471_reg_fields,
|
||||
ARRAY_SIZE(rt9471_reg_fields));
|
||||
if (ret)
|
||||
return dev_err_probe(dev, ret, "Failed to alloc regmap field\n");
|
||||
|
||||
ret = rt9471_check_devinfo(chip);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
ret = regmap_register_patch(regmap, rt9471_init_regs,
|
||||
ARRAY_SIZE(rt9471_init_regs));
|
||||
if (ret)
|
||||
return dev_err_probe(dev, ret, "Failed to init registers\n");
|
||||
|
||||
ret = devm_regmap_add_irq_chip(dev, regmap, i2c->irq,
|
||||
IRQF_TRIGGER_FALLING | IRQF_ONESHOT, 0,
|
||||
&rt9471_irq_chip, &chip->irq_chip_data);
|
||||
if (ret)
|
||||
return dev_err_probe(dev, ret, "Failed to add IRQ chip\n");
|
||||
|
||||
ret = rt9471_register_psy(chip);
|
||||
if (ret)
|
||||
return dev_err_probe(dev, ret, "Failed to register psy\n");
|
||||
|
||||
ret = rt9471_register_otg_regulator(chip);
|
||||
if (ret)
|
||||
return dev_err_probe(dev, ret, "Failed to register otg\n");
|
||||
|
||||
ret = rt9471_register_interrupts(chip);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
/* After IRQs are all initialized, enable port detection by default */
|
||||
return regmap_field_write(chip->rm_fields[F_BC12_EN], 1);
|
||||
}
|
||||
|
||||
static void rt9471_shutdown(struct i2c_client *i2c)
|
||||
{
|
||||
struct rt9471_chip *chip = i2c_get_clientdata(i2c);
|
||||
|
||||
/*
|
||||
* There's no external reset pin. Do register reset to guarantee charger
|
||||
* function is normal after shutdown
|
||||
*/
|
||||
regmap_field_write(chip->rm_fields[F_REG_RST], 1);
|
||||
}
|
||||
|
||||
static const struct of_device_id rt9471_of_device_id[] = {
|
||||
{ .compatible = "richtek,rt9471" },
|
||||
{}
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, rt9471_of_device_id);
|
||||
|
||||
static struct i2c_driver rt9471_driver = {
|
||||
.driver = {
|
||||
.name = "rt9471",
|
||||
.of_match_table = rt9471_of_device_id,
|
||||
},
|
||||
.probe_new = rt9471_probe,
|
||||
.shutdown = rt9471_shutdown,
|
||||
};
|
||||
module_i2c_driver(rt9471_driver);
|
||||
|
||||
MODULE_DESCRIPTION("Richtek RT9471 charger driver");
|
||||
MODULE_AUTHOR("Alina Yu <alina_yu@richtek.com>");
|
||||
MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
|
||||
MODULE_LICENSE("GPL");
|
Loading…
Reference in New Issue
Block a user