* [PATCH v4 2/3] power: supply: Add Richtek RT9759 smart cap divider charger
2023-02-06 1:45 [PATCH v4 0/3] Add Richtek RT9759 smart cap divider charger support cy_huang
2023-02-06 1:45 ` [PATCH v4 1/3] dt-bindings: power: supply: Add Richtek RT9759 smart cap divider charger cy_huang
@ 2023-02-06 1:45 ` cy_huang
2023-02-06 1:45 ` [PATCH v4 3/3] Documentation: power: rt9759: Document exported sysfs entries cy_huang
2 siblings, 0 replies; 4+ messages in thread
From: cy_huang @ 2023-02-06 1:45 UTC (permalink / raw)
To: sre, robh+dt, krzysztof.kozlowski+dt
Cc: cy_huang, allen_chiang, u0084500, linux-pm, linux-kernel,
devicetree
From: ChiYuan Huang <cy_huang@richtek.com>
Add support for RT9759 smart cap divider charger.
The RT9759 is a high efficiency and high charge current charger. The
maximum charge current is up to 8A. It integrates a dual-phase charge
pump core with ADC monitoring.
Co-developed-by: Allen Chiang <allen_chiang@richtek.com>
Signed-off-by: Allen Chiang <allen_chiang@richtek.com>
Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
---
Since v4:
- Modify year from 2022 to 2023 for the license string.
Since v3:
- Fix patch title typo (from 'rt9471' to 'rt9759')
- Remove unused R_VAC_OVP range.
- Refer to ABI document, use 'status' to control battery charging, not 'online'
- Refer to ABI document, use 'online' to indicate bus state
Since v2:
No change
---
drivers/power/supply/Kconfig | 15 ++
drivers/power/supply/Makefile | 1 +
drivers/power/supply/rt9759.c | 613 ++++++++++++++++++++++++++++++++++++++++++
3 files changed, 629 insertions(+)
create mode 100644 drivers/power/supply/rt9759.c
diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig
index 0bbfe6a..2f24f29 100644
--- a/drivers/power/supply/Kconfig
+++ b/drivers/power/supply/Kconfig
@@ -785,6 +785,21 @@ config BATTERY_RT5033
The fuelgauge calculates and determines the battery state of charge
according to battery open circuit voltage.
+config CHARGER_RT9759
+ tristate "Richtek RT9759 smart cap divider charger driver"
+ depends on I2C
+ select REGMAP_I2C
+ select LINEAR_RANGES
+ help
+ This adds support for Richtek RT9759 smart cap divider charger driver.
+ It's a high efficiency and high charge current charger. the device
+ integrates smart cap divider topology with 9-channel high speed
+ ADCs that can provide input and output voltage, current and
+ temperature monitoring.
+
+ This driver can also be built as a module. If so, the module will be
+ called rt9759.
+
config CHARGER_RT9455
tristate "Richtek RT9455 battery charger driver"
depends on I2C
diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile
index 0ee8653..b872c06 100644
--- a/drivers/power/supply/Makefile
+++ b/drivers/power/supply/Makefile
@@ -56,6 +56,7 @@ obj-$(CONFIG_BATTERY_MAX17042) += max17042_battery.o
obj-$(CONFIG_BATTERY_MAX1721X) += max1721x_battery.o
obj-$(CONFIG_BATTERY_Z2) += z2_battery.o
obj-$(CONFIG_BATTERY_RT5033) += rt5033_battery.o
+obj-$(CONFIG_CHARGER_RT9759) += rt9759.o
obj-$(CONFIG_CHARGER_RT9455) += rt9455_charger.o
obj-$(CONFIG_BATTERY_S3C_ADC) += s3c_adc_battery.o
obj-$(CONFIG_BATTERY_TWL4030_MADC) += twl4030_madc_battery.o
diff --git a/drivers/power/supply/rt9759.c b/drivers/power/supply/rt9759.c
new file mode 100644
index 00000000..2b35199
--- /dev/null
+++ b/drivers/power/supply/rt9759.c
@@ -0,0 +1,613 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2023 Richtek Technology Corp.
+ *
+ * Authors: Allen Chiang <allen_chiang@richtek.com>
+ * ChiYuan Huang <cy_huang@richtek.com>
+ */
+
+#include <linux/i2c.h>
+#include <linux/kernel.h>
+#include <linux/linear_range.h>
+#include <linux/interrupt.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/power_supply.h>
+#include <linux/regmap.h>
+#include <linux/sysfs.h>
+#include <linux/util_macros.h>
+
+#define RT9759_REG_VBATOVP 0x00
+#define RT9759_REG_IBATOCP 0x02
+#define RT9759_REG_VBUSOVP 0x06
+#define RT9759_REG_IBUSOCPUCP 0x08
+#define RT9759_REG_CONVST 0x0A
+#define RT9759_REG_CHGCTL0 0x0B
+#define RT9759_REG_CHGCTL1 0x0C
+#define RT9759_REG_INTSTAT 0x0D
+#define RT9759_REG_FLTFLAG 0x11
+#define RT9759_REG_DEVINFO 0x13
+#define RT9759_REG_ADCCTL 0x14
+#define RT9759_REG_IBUSADC 0x16
+#define RT9759_REG_REGCTL 0x2B
+#define RT9759_REG_OTHER4 0x33
+
+#define RT9759_VBUSUCP_MASK BIT(4)
+#define RT9759_TDIEOTP_MASK BIT(7)
+#define RT9759_WDT_MASK BIT(3)
+#define RT9759_BUSBATOVP_MASK (BIT(7) | BIT(5))
+#define RT9759_BUSBATOCP_MASK (BIT(6) | BIT(4))
+#define RT9759_ADCEN_MASK BIT(7)
+#define RT9759_ADCONCE_MASK BIT(6)
+
+#define RT9759_DEVID 0x08
+#define RT9759_ADC_CONVTIME 2000
+#define RT9759_ADC_MAXWAIT 16000
+
+enum rt9759_adc_chan {
+ ADC_IBUS = 0,
+ ADC_VBUS,
+ ADC_VAC,
+ ADC_VOUT,
+ ADC_VBAT,
+ ADC_IBAT,
+ ADC_TSBUS,
+ ADC_TSBAT,
+ ADC_TDIE,
+ ADC_MAX_CHANNEL
+};
+
+enum rt9759_fields {
+ F_VBATOVP = 0,
+ F_IBATOCP,
+ F_VBUSOVP,
+ F_IBUSOCP,
+ F_SWITCHING,
+ F_REG_RST,
+ F_WDT_DIS,
+ F_WDT_TMR,
+ F_CHG_EN,
+ F_VAC_INSERT,
+ F_DEV_ID,
+ F_ADC_EN,
+ F_IBAT_RSEN,
+ F_MAX_FIELD
+};
+
+enum rt9759_ranges {
+ R_VBATOVP = 0,
+ R_IBATOCP,
+ R_VBUSOVP,
+ R_IBUSOCP,
+ R_MAX_RANGE
+};
+
+static const struct reg_field rt9759_chg_fields[F_MAX_FIELD] = {
+ [F_VBATOVP] = REG_FIELD(RT9759_REG_VBATOVP, 0, 5),
+ [F_IBATOCP] = REG_FIELD(RT9759_REG_IBATOCP, 0, 6),
+ [F_VBUSOVP] = REG_FIELD(RT9759_REG_VBUSOVP, 0, 6),
+ [F_IBUSOCP] = REG_FIELD(RT9759_REG_IBUSOCPUCP, 0, 3),
+ [F_SWITCHING] = REG_FIELD(RT9759_REG_CONVST, 2, 2),
+ [F_REG_RST] = REG_FIELD(RT9759_REG_CHGCTL0, 7, 7),
+ [F_WDT_DIS] = REG_FIELD(RT9759_REG_CHGCTL0, 2, 2),
+ [F_WDT_TMR] = REG_FIELD(RT9759_REG_CHGCTL0, 0, 1),
+ [F_CHG_EN] = REG_FIELD(RT9759_REG_CHGCTL1, 7, 7),
+ [F_VAC_INSERT] = REG_FIELD(RT9759_REG_INTSTAT, 2, 2),
+ [F_DEV_ID] = REG_FIELD(RT9759_REG_DEVINFO, 0, 3),
+ [F_ADC_EN] = REG_FIELD(RT9759_REG_ADCCTL, 7, 7),
+ [F_IBAT_RSEN] = REG_FIELD(RT9759_REG_REGCTL, 1, 1),
+};
+
+/* All converted to microvolt or microamp */
+static const struct linear_range rt9759_chg_ranges[R_MAX_RANGE] = {
+ LINEAR_RANGE_IDX(R_VBATOVP, 3500000, 0, 63, 25000),
+ LINEAR_RANGE_IDX(R_IBATOCP, 2000000, 0, 80, 100000),
+ LINEAR_RANGE_IDX(R_VBUSOVP, 6000000, 0, 127, 50000),
+ LINEAR_RANGE_IDX(R_IBUSOCP, 1000000, 0, 15, 250000),
+};
+
+struct charger_event {
+ unsigned int ucp_flag;
+ unsigned int conv_flag;
+ unsigned int wdt_flag;
+ unsigned int flt_flag;
+};
+
+struct rt9759_data {
+ struct device *dev;
+ struct regmap *regmap;
+ struct regmap_field *rm_fields[F_MAX_FIELD];
+ struct power_supply *psy;
+ struct mutex adc_lock;
+ struct power_supply_desc psy_desc;
+ struct charger_event chg_evt;
+ unsigned int rg_resistor;
+ unsigned int real_resistor;
+};
+
+static int rt9759_get_value_by_field_range(struct rt9759_data *data,
+ enum rt9759_fields field,
+ enum rt9759_ranges rsel, int *val)
+{
+ const struct linear_range *range = rt9759_chg_ranges + rsel;
+ unsigned int sel;
+ int ret;
+
+ ret = regmap_field_read(data->rm_fields[field], &sel);
+ if (ret)
+ return ret;
+
+ return linear_range_get_value(range, sel, val);
+}
+
+static int rt9759_set_value_by_field_range(struct rt9759_data *data,
+ enum rt9759_fields field,
+ enum rt9759_ranges rsel, int val)
+{
+ const struct linear_range *range = rt9759_chg_ranges + rsel;
+ unsigned int sel;
+
+ linear_range_get_selector_within(range, val, &sel);
+ return regmap_field_write(data->rm_fields[field], sel);
+}
+
+static int rt9759_get_adc(struct rt9759_data *data, enum rt9759_adc_chan chan,
+ int *val)
+{
+ struct regmap *regmap = data->regmap;
+ unsigned int reg_addr = RT9759_REG_IBUSADC + chan * 2;
+ unsigned int mask = RT9759_ADCEN_MASK | RT9759_ADCONCE_MASK;
+ unsigned int adc_cntl;
+ __be16 raws;
+ int scale, ret;
+
+ mutex_lock(&data->adc_lock);
+
+ ret = regmap_update_bits(regmap, RT9759_REG_ADCCTL, mask, mask);
+ if (ret)
+ goto adc_unlock;
+
+ ret = regmap_read_poll_timeout(regmap, RT9759_REG_ADCCTL, adc_cntl,
+ !(adc_cntl & RT9759_ADCEN_MASK),
+ RT9759_ADC_CONVTIME, RT9759_ADC_MAXWAIT);
+ if (ret && ret != -ETIMEDOUT)
+ goto adc_unlock;
+
+ ret = regmap_raw_read(regmap, reg_addr, &raws, sizeof(raws));
+ if (ret)
+ goto adc_unlock;
+
+ /*
+ * TDIE LSB 0.5'c, others LSB 1000uV or 1000uA.
+ * Rsense ratio is needed for IBAT channel
+ */
+ if (chan == ADC_TDIE)
+ scale = 5;
+ else if (chan == ADC_IBAT)
+ scale = 1000 * data->rg_resistor / data->real_resistor;
+ else
+ scale = 1000;
+
+
+ *val = be16_to_cpu(raws) * scale;
+
+adc_unlock:
+ regmap_update_bits(regmap, RT9759_REG_ADCCTL, mask, 0);
+
+ mutex_unlock(&data->adc_lock);
+
+ return ret;
+}
+
+static int rt9759_get_switching_state(struct rt9759_data *data, int *status)
+{
+ unsigned int switching_state;
+ int ret;
+
+ ret = regmap_field_read(data->rm_fields[F_SWITCHING], &switching_state);
+ if (ret)
+ return ret;
+
+ if (switching_state)
+ *status = POWER_SUPPLY_STATUS_CHARGING;
+ else
+ *status = POWER_SUPPLY_STATUS_NOT_CHARGING;
+
+ return 0;
+}
+
+static int rt9759_get_charger_health(struct rt9759_data *data)
+{
+ struct charger_event *evt = &data->chg_evt;
+
+ if (evt->ucp_flag & RT9759_VBUSUCP_MASK)
+ return POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
+
+ if (evt->conv_flag & RT9759_TDIEOTP_MASK)
+ return POWER_SUPPLY_HEALTH_OVERHEAT;
+
+ if (evt->wdt_flag & RT9759_WDT_MASK)
+ return POWER_SUPPLY_HEALTH_WATCHDOG_TIMER_EXPIRE;
+
+ if (evt->flt_flag & RT9759_BUSBATOVP_MASK)
+ return POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+
+ if (evt->flt_flag & RT9759_BUSBATOCP_MASK)
+ return POWER_SUPPLY_HEALTH_OVERCURRENT;
+
+ return POWER_SUPPLY_HEALTH_GOOD;
+}
+
+static const char * const rt9759_manufacturer = "Richtek Technology Corp.";
+static const char * const rt9759_model = "RT9759";
+
+static int rt9759_psy_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct rt9759_data *data = power_supply_get_drvdata(psy);
+ int *pval = &val->intval;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_STATUS:
+ return rt9759_get_switching_state(data, pval);
+ case POWER_SUPPLY_PROP_HEALTH:
+ *pval = rt9759_get_charger_health(data);
+ return 0;
+ case POWER_SUPPLY_PROP_ONLINE:
+ return regmap_field_read(data->rm_fields[F_VAC_INSERT], pval);
+ case POWER_SUPPLY_PROP_VOLTAGE_MAX:
+ return rt9759_get_value_by_field_range(data, F_VBUSOVP, R_VBUSOVP, pval);
+ case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+ return rt9759_get_adc(data, ADC_VBUS, pval);
+ case POWER_SUPPLY_PROP_CURRENT_MAX:
+ return rt9759_get_value_by_field_range(data, F_IBUSOCP, R_IBUSOCP, pval);
+ case POWER_SUPPLY_PROP_CURRENT_NOW:
+ return rt9759_get_adc(data, ADC_IBUS, pval);
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
+ return rt9759_get_value_by_field_range(data, F_VBATOVP, R_VBATOVP, pval);
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
+ return rt9759_get_value_by_field_range(data, F_IBATOCP, R_IBATOCP, pval);
+ case POWER_SUPPLY_PROP_TEMP:
+ return rt9759_get_adc(data, ADC_TDIE, pval);
+ case POWER_SUPPLY_PROP_MODEL_NAME:
+ val->strval = rt9759_model;
+ return 0;
+ case POWER_SUPPLY_PROP_MANUFACTURER:
+ val->strval = rt9759_manufacturer;
+ return 0;
+ default:
+ return -ENODATA;
+ }
+}
+
+static int rt9759_psy_set_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ const union power_supply_propval *val)
+{
+ struct rt9759_data *data = power_supply_get_drvdata(psy);
+ int intval = val->intval;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_STATUS:
+ /* Before enabled, clear stored event */
+ if (intval)
+ memset(&data->chg_evt, 0, sizeof(data->chg_evt));
+
+ return regmap_field_write(data->rm_fields[F_CHG_EN], !!intval);
+ case POWER_SUPPLY_PROP_VOLTAGE_MAX:
+ return rt9759_set_value_by_field_range(data, F_VBUSOVP, R_VBUSOVP, intval);
+ case POWER_SUPPLY_PROP_CURRENT_MAX:
+ return rt9759_set_value_by_field_range(data, F_IBUSOCP, R_IBUSOCP, intval);
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
+ return rt9759_set_value_by_field_range(data, F_VBATOVP, R_VBATOVP, intval);
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
+ return rt9759_set_value_by_field_range(data, F_IBATOCP, R_IBATOCP, intval);
+ default:
+ return -EINVAL;
+ }
+}
+
+static const enum power_supply_property rt9759_psy_properties[] = {
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_HEALTH,
+ POWER_SUPPLY_PROP_ONLINE,
+ POWER_SUPPLY_PROP_VOLTAGE_MAX,
+ POWER_SUPPLY_PROP_VOLTAGE_NOW,
+ POWER_SUPPLY_PROP_CURRENT_MAX,
+ POWER_SUPPLY_PROP_CURRENT_NOW,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
+ POWER_SUPPLY_PROP_TEMP,
+ POWER_SUPPLY_PROP_MODEL_NAME,
+ POWER_SUPPLY_PROP_MANUFACTURER,
+};
+
+static int rt9759_psy_property_is_writeable(struct power_supply *psy,
+ enum power_supply_property psp)
+{
+ switch (psp) {
+ case POWER_SUPPLY_PROP_STATUS:
+ case POWER_SUPPLY_PROP_VOLTAGE_MAX:
+ case POWER_SUPPLY_PROP_CURRENT_MAX:
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
+ return 1;
+ default:
+ return 0;
+ }
+}
+
+static const unsigned int rt9759_wdt_millisecond[] = { 500, 1000, 5000, 30000 };
+
+static ssize_t watchdog_timer_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct power_supply *psy = to_power_supply(dev);
+ struct rt9759_data *data = power_supply_get_drvdata(psy);
+ unsigned int wdt_tmr_now = 0, wdt_sel, wdt_dis;
+ int ret;
+
+ ret = regmap_field_read(data->rm_fields[F_WDT_DIS], &wdt_dis);
+ if (ret)
+ return ret;
+
+ if (!wdt_dis) {
+ ret = regmap_field_read(data->rm_fields[F_WDT_TMR], &wdt_sel);
+ if (ret)
+ return ret;
+
+ wdt_tmr_now = rt9759_wdt_millisecond[wdt_sel];
+ }
+
+ return sysfs_emit(buf, "%d\n", wdt_tmr_now);
+}
+
+static ssize_t watchdog_timer_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct power_supply *psy = to_power_supply(dev);
+ struct rt9759_data *data = power_supply_get_drvdata(psy);
+ unsigned int wdt_set, wdt_sel;
+ int ret;
+
+ ret = kstrtouint(buf, 10, &wdt_set);
+ if (ret)
+ return ret;
+
+ ret = regmap_field_write(data->rm_fields[F_WDT_DIS], 1);
+ if (ret)
+ return ret;
+
+ wdt_sel = find_closest(wdt_set, rt9759_wdt_millisecond,
+ ARRAY_SIZE(rt9759_wdt_millisecond));
+
+ ret = regmap_field_write(data->rm_fields[F_WDT_TMR], wdt_sel);
+ if (ret)
+ return ret;
+
+ if (wdt_set) {
+ ret = regmap_field_write(data->rm_fields[F_WDT_DIS], 0);
+ if (ret)
+ return ret;
+ }
+
+ return count;
+}
+
+static ssize_t battery_voltage_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct power_supply *psy = to_power_supply(dev);
+ struct rt9759_data *data = power_supply_get_drvdata(psy);
+ int vbat_now, ret;
+
+ ret = rt9759_get_adc(data, ADC_VBAT, &vbat_now);
+ if (ret)
+ return ret;
+
+ return sysfs_emit(buf, "%d\n", vbat_now);
+}
+
+static ssize_t battery_current_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct power_supply *psy = to_power_supply(dev);
+ struct rt9759_data *data = power_supply_get_drvdata(psy);
+ int ibat_now, ret;
+
+ ret = rt9759_get_adc(data, ADC_IBAT, &ibat_now);
+ if (ret)
+ return ret;
+
+ return sysfs_emit(buf, "%d\n", ibat_now);
+}
+
+static DEVICE_ATTR_RW(watchdog_timer);
+static DEVICE_ATTR_RO(battery_voltage);
+static DEVICE_ATTR_RO(battery_current);
+
+static struct attribute *rt9759_sysfs_attrs[] = {
+ &dev_attr_watchdog_timer.attr,
+ &dev_attr_battery_voltage.attr,
+ &dev_attr_battery_current.attr,
+ NULL
+};
+
+ATTRIBUTE_GROUPS(rt9759_sysfs);
+
+static int rt9759_register_psy(struct rt9759_data *data)
+{
+ struct device *dev = data->dev;
+ struct power_supply_desc *desc = &data->psy_desc;
+ struct power_supply_config cfg = {};
+ char *psy_name;
+
+ cfg.drv_data = data;
+ cfg.of_node = dev->of_node;
+ cfg.attr_grp = rt9759_sysfs_groups;
+
+ psy_name = devm_kasprintf(dev, GFP_KERNEL, "rt9759-%s", dev_name(dev));
+ if (!psy_name)
+ return -ENOMEM;
+
+ desc->name = psy_name;
+ desc->type = POWER_SUPPLY_TYPE_USB;
+ desc->properties = rt9759_psy_properties;
+ desc->num_properties = ARRAY_SIZE(rt9759_psy_properties);
+ desc->property_is_writeable = rt9759_psy_property_is_writeable;
+ desc->get_property = rt9759_psy_get_property;
+ desc->set_property = rt9759_psy_set_property;
+
+ data->psy = devm_power_supply_register(dev, desc, &cfg);
+
+ return PTR_ERR_OR_ZERO(data->psy);
+}
+
+static irqreturn_t rt9759_irq_handler(int irq, void *devid)
+{
+ struct rt9759_data *data = devid;
+ struct regmap *regmap = data->regmap;
+ struct charger_event *evt = &data->chg_evt;
+ int ret;
+
+ ret = regmap_read(regmap, RT9759_REG_IBUSOCPUCP, &evt->ucp_flag);
+ if (ret)
+ return IRQ_NONE;
+
+ ret = regmap_read(regmap, RT9759_REG_CONVST, &evt->conv_flag);
+ if (ret)
+ return IRQ_NONE;
+
+ ret = regmap_read(regmap, RT9759_REG_CHGCTL0, &evt->wdt_flag);
+ if (ret)
+ return IRQ_NONE;
+
+ ret = regmap_read(regmap, RT9759_REG_FLTFLAG, &evt->flt_flag);
+ if (ret)
+ return IRQ_NONE;
+
+ power_supply_changed(data->psy);
+
+ return IRQ_HANDLED;
+}
+
+static int rt9759_config_batsense_resistor(struct rt9759_data *data)
+{
+ unsigned int shunt_resistor_uohms = 2000, rsense_sel;
+
+ device_property_read_u32(data->dev, "shunt-resistor-micro-ohms",
+ &shunt_resistor_uohms);
+
+ if (!shunt_resistor_uohms || shunt_resistor_uohms > 5000)
+ return -EINVAL;
+
+ data->real_resistor = shunt_resistor_uohms;
+
+ if (shunt_resistor_uohms <= 2000) {
+ rsense_sel = 0;
+ data->rg_resistor = 2000;
+ } else {
+ rsense_sel = 1;
+ data->rg_resistor = 5000;
+ }
+
+ return regmap_field_write(data->rm_fields[F_IBAT_RSEN], rsense_sel);
+}
+
+static const struct reg_sequence rt9759_init_regs[] = {
+ REG_SEQ(0x0B, 0x80, 1000), /* REG_RESET */
+ REG_SEQ0(0x05, 0x00), /* VAC_OVP = 11V */
+ REG_SEQ0(0x0B, 0x44), /* WDT_DIS = 1 */
+ REG_SEQ0(0x0C, 0x06), /* TSBUS/TSBAT OTP_DIS = 1 */
+ REG_SEQ0(0x0F, 0xF9), /* DIS ALARM & ADC_DONE */
+ REG_SEQ0(0x14, 0x00), /* IBUS_ADC_DIS = 0 */
+};
+
+static const struct regmap_config rt9759_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = RT9759_REG_OTHER4,
+};
+
+static int rt9759_probe(struct i2c_client *i2c)
+{
+ struct device *dev = &i2c->dev;
+ struct rt9759_data *data;
+ struct regmap *regmap;
+ unsigned int devid;
+ int ret;
+
+ data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ data->dev = dev;
+ mutex_init(&data->adc_lock);
+ i2c_set_clientdata(i2c, data);
+
+ regmap = devm_regmap_init_i2c(i2c, &rt9759_regmap_config);
+ if (IS_ERR(regmap))
+ return dev_err_probe(dev, PTR_ERR(regmap), "Failed to init regmap\n");
+
+ data->regmap = regmap;
+
+ ret = devm_regmap_field_bulk_alloc(dev, regmap, data->rm_fields,
+ rt9759_chg_fields,
+ ARRAY_SIZE(rt9759_chg_fields));
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to alloc regmap fields\n");
+
+ ret = regmap_field_read(data->rm_fields[F_DEV_ID], &devid);
+ if (ret)
+ return dev_err_probe(dev, ret, "Filaed to read devid\n");
+
+ if (devid != RT9759_DEVID)
+ return dev_err_probe(dev, -ENODEV, "Incorrect VID 0x%02x\n", devid);
+
+ ret = regmap_register_patch(regmap, rt9759_init_regs,
+ ARRAY_SIZE(rt9759_init_regs));
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to init registers\n");
+
+ ret = rt9759_config_batsense_resistor(data);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to config batsense resistor\n");
+
+ ret = rt9759_register_psy(data);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to init power supply\n");
+
+ return devm_request_threaded_irq(dev, i2c->irq, NULL, rt9759_irq_handler,
+ IRQF_ONESHOT, dev_name(dev), data);
+}
+
+static void rt9759_shutdown(struct i2c_client *i2c)
+{
+ struct rt9759_data *data = i2c_get_clientdata(i2c);
+
+ regmap_field_write(data->rm_fields[F_REG_RST], 1);
+}
+
+static const struct of_device_id rt9759_device_match_table[] = {
+ { .compatible = "richtek,rt9759" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, rt9759_device_match_table);
+
+static struct i2c_driver rt9759_charger_driver = {
+ .driver = {
+ .name = "rt9759",
+ .of_match_table = rt9759_device_match_table,
+ },
+ .probe_new = rt9759_probe,
+ .shutdown = rt9759_shutdown,
+};
+module_i2c_driver(rt9759_charger_driver);
+
+MODULE_DESCRIPTION("Richtek RT9759 charger driver");
+MODULE_AUTHOR("Allen Chiang <allen_chiang@richtek.com>");
+MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
+MODULE_LICENSE("GPL");
--
2.7.4
^ permalink raw reply related [flat|nested] 4+ messages in thread