gjdwebserver-overlay/sys-kernel/pinephone-sources/files/0015-power-supply-rk818-charger-Implement-charger-driver-.patch
Gerben Jan Dijkman 03dcb3fa3b Added patch files
2022-01-11 10:08:21 +01:00

700 lines
19 KiB
Diff

From: Ondrej Jirman <megous@megous.com>
Date: Sun, 7 Nov 2021 20:09:02 +0100
Subject: [PATCH 15/36] power: supply: rk818-charger: Implement charger driver
for RK818 PMIC
For now this driver is just meant to watch Type-C power supply
and apply current limits to RK818, to not overload the Type-C
partner.
Signed-off-by: Ondrej Jirman <megous@megous.com>
---
drivers/mfd/rk808.c | 1 +
drivers/power/supply/Kconfig | 8 +
drivers/power/supply/Makefile | 1 +
drivers/power/supply/rk818_charger.c | 637 +++++++++++++++++++++++++++++++++++
4 files changed, 647 insertions(+)
create mode 100644 drivers/power/supply/rk818_charger.c
diff --git a/drivers/mfd/rk808.c b/drivers/mfd/rk808.c
index a99fec0..75d18de 100644
--- a/drivers/mfd/rk808.c
+++ b/drivers/mfd/rk808.c
@@ -206,6 +206,7 @@ static const struct mfd_cell rk818s[] = {
{ .name = "rk808-clkout", },
{ .name = "rk808-regulator", },
{ .name = "rk818-battery", .of_compatible = "rockchip,rk818-battery", },
+ { .name = "rk818-charger", .of_compatible = "rockchip,rk818-charger", },
{
.name = "rk808-rtc",
.num_resources = ARRAY_SIZE(rtc_resources),
diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig
index f5d4434..6bf0834 100644
--- a/drivers/power/supply/Kconfig
+++ b/drivers/power/supply/Kconfig
@@ -862,4 +862,12 @@ config BATTERY_RK818
If you say yes here you will get support for the battery of RK818 PMIC.
This driver can give support for Rk818 Battery Charge Interface.
+config CHARGER_RK818
+ bool "RK818 Charger driver"
+ depends on MFD_RK808
+ default n
+ help
+ If you say yes here you will get support for the charger of RK818 PMIC.
+ This driver can give support for Rk818 Charger Interface.
+
endif # POWER_SUPPLY
diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile
index 1c725ee..3a1526f 100644
--- a/drivers/power/supply/Makefile
+++ b/drivers/power/supply/Makefile
@@ -105,3 +105,4 @@ obj-$(CONFIG_BATTERY_ACER_A500) += acer_a500_battery.o
obj-$(CONFIG_BATTERY_SURFACE) += surface_battery.o
obj-$(CONFIG_CHARGER_SURFACE) += surface_charger.o
obj-$(CONFIG_BATTERY_RK818) += rk818_battery.o
+obj-$(CONFIG_CHARGER_RK818) += rk818_charger.o
diff --git a/drivers/power/supply/rk818_charger.c b/drivers/power/supply/rk818_charger.c
new file mode 100644
index 00000000..7b67a0b
--- /dev/null
+++ b/drivers/power/supply/rk818_charger.c
@@ -0,0 +1,637 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * rk818 usb power driver
+ *
+ * Copyright (c) 2021 Ondřej Jirman <megi@xff.cz>
+ */
+#include <linux/delay.h>
+#include <linux/kernel.h>
+#include <linux/mfd/rk808.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+#include <linux/regmap.h>
+
+#define RK818_CHG_STS_MASK (7u << 4) /* charger status */
+#define RK818_CHG_STS_NONE (0u << 4)
+#define RK818_CHG_STS_WAKEUP_CUR (1u << 4)
+#define RK818_CHG_STS_TRICKLE_CUR (2u << 4)
+#define RK818_CHG_STS_CC_OR_CV (3u << 4)
+#define RK818_CHG_STS_TERMINATED (4u << 4)
+#define RK818_CHG_STS_USB_OV (5u << 4)
+#define RK818_CHG_STS_BAT_TEMP_FAULT (6u << 4)
+#define RK818_CHG_STS_TIMEOUT (7u << 4)
+
+/* RK818_SUP_STS_REG */
+#define RK818_SUP_STS_USB_VLIM_EN BIT(3) /* input voltage limit enable */
+#define RK818_SUP_STS_USB_ILIM_EN BIT(2) /* input current limit enable */
+#define RK818_SUP_STS_USB_EXS BIT(1) /* USB power connected */
+#define RK818_SUP_STS_USB_EFF BIT(0) /* USB fault */
+
+/* RK818_USB_CTRL_REG */
+#define RK818_USB_CTRL_USB_ILIM_MASK (0xfu)
+#define RK818_USB_CTRL_USB_CHG_SD_VSEL_OFFSET 4
+#define RK818_USB_CTRL_USB_CHG_SD_VSEL_MASK (0x7u << 4)
+
+/* RK818_CHRG_CTRL_REG1 */
+#define RK818_CHRG_CTRL_REG1_CHRG_EN BIT(7)
+#define RK818_CHRG_CTRL_REG1_CHRG_VOL_SEL_OFFSET 4
+#define RK818_CHRG_CTRL_REG1_CHRG_VOL_SEL_MASK (0x7u << 4)
+#define RK818_CHRG_CTRL_REG1_CHRG_CUR_SEL_OFFSET 0
+#define RK818_CHRG_CTRL_REG1_CHRG_CUR_SEL_MASK (0xfu << 0)
+
+/* RK818_CHRG_CTRL_REG3 */
+#define RK818_CHRG_CTRL_REG3_CHRG_TERM_DIGITAL BIT(5)
+
+struct rk818_charger {
+ struct device *dev;
+ struct rk808 *rk818;
+ struct regmap *regmap;
+
+ struct power_supply *usb_psy;
+ struct power_supply *charger_psy;
+};
+
+// {{{ USB supply
+
+static int rk818_usb_set_input_current_max(struct rk818_charger *cg,
+ int val)
+{
+ int ret;
+ unsigned reg;
+
+ if (val < 450000)
+ reg = 1;
+ else if (val < 850000)
+ reg = 0;
+ else if (val < 1000000)
+ reg = 2;
+ else if (val < 3000000)
+ reg = 3 + (val - 1000000) / 250000;
+ else
+ reg = 11;
+
+ ret = regmap_update_bits(cg->regmap, RK818_USB_CTRL_REG,
+ RK818_USB_CTRL_USB_ILIM_MASK, reg);
+ if (ret)
+ dev_err(cg->dev,
+ "USB input current limit setting failed (%d)\n", ret);
+
+ return ret;
+}
+
+static int rk818_usb_get_input_current_max(struct rk818_charger *cg,
+ int *val)
+{
+ unsigned reg;
+ int ret;
+
+ ret = regmap_read(cg->regmap, RK818_USB_CTRL_REG, &reg);
+ if (ret) {
+ dev_err(cg->dev,
+ "USB input current limit getting failed (%d)\n", ret);
+ return ret;
+ }
+
+ reg &= RK818_USB_CTRL_USB_ILIM_MASK;
+ if (reg == 0)
+ *val = 450000;
+ else if (reg == 1)
+ *val = 80000;
+ else if (reg == 2)
+ *val = 850000;
+ else if (reg < 11)
+ *val = 1000000 + (reg - 3) * 250000;
+ else
+ *val = 3000000;
+
+ return 0;
+}
+
+static int rk818_usb_set_input_voltage_min(struct rk818_charger *cg,
+ int val)
+{
+ unsigned reg;
+ int ret;
+
+ if (val < 2780000)
+ reg = 0;
+ else if (val < 3270000)
+ reg = (val - 2780000) / 70000;
+ else
+ reg = 7;
+
+ ret = regmap_update_bits(cg->regmap, RK818_USB_CTRL_REG,
+ RK818_USB_CTRL_USB_CHG_SD_VSEL_MASK,
+ reg << RK818_USB_CTRL_USB_CHG_SD_VSEL_OFFSET);
+ if (ret)
+ dev_err(cg->dev,
+ "USB input voltage limit setting failed (%d)\n", ret);
+
+ return ret;
+}
+
+static int rk818_usb_get_input_voltage_min(struct rk818_charger *cg,
+ int *val)
+{
+ unsigned reg;
+ int ret;
+
+ ret = regmap_read(cg->regmap, RK818_USB_CTRL_REG, &reg);
+ if (ret) {
+ dev_err(cg->dev,
+ "USB input voltage limit getting failed (%d)\n", ret);
+ return ret;
+ }
+
+ reg &= RK818_USB_CTRL_USB_CHG_SD_VSEL_MASK;
+ reg >>= RK818_USB_CTRL_USB_CHG_SD_VSEL_OFFSET;
+
+ *val = 2780000 + (reg * 70000);
+
+ return 0;
+}
+
+static int rk818_usb_power_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct rk818_charger *cg = power_supply_get_drvdata(psy);
+ unsigned reg;
+ int ret;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_PRESENT:
+ ret = regmap_read(cg->regmap, RK818_SUP_STS_REG, &reg);
+ if (ret)
+ return ret;
+
+ val->intval = !!(reg & RK818_SUP_STS_USB_EXS);
+ break;
+
+ case POWER_SUPPLY_PROP_HEALTH:
+ ret = regmap_read(cg->regmap, RK818_SUP_STS_REG, &reg);
+ if (ret)
+ return ret;
+
+ if (!(reg & RK818_SUP_STS_USB_EXS)) {
+ val->intval = POWER_SUPPLY_HEALTH_UNKNOWN;
+ } else if (reg & RK818_SUP_STS_USB_EFF) {
+ val->intval = POWER_SUPPLY_HEALTH_GOOD;
+ } else {
+ val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
+ }
+
+ break;
+
+ case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
+ return rk818_usb_get_input_voltage_min(cg, &val->intval);
+
+ case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+ return rk818_usb_get_input_current_max(cg, &val->intval);
+
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int rk818_usb_power_set_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ const union power_supply_propval *val)
+{
+ struct rk818_charger *cg = power_supply_get_drvdata(psy);
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
+ return rk818_usb_set_input_voltage_min(cg, val->intval);
+
+ case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+ return rk818_usb_set_input_current_max(cg, val->intval);
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static int rk818_usb_power_prop_writeable(struct power_supply *psy,
+ enum power_supply_property psp)
+{
+ switch (psp) {
+ case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+ case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
+ return 1;
+
+ default:
+ return 0;
+ }
+}
+
+/* Sync the input-current-limit with our parent supply (if we have one) */
+static void rk818_usb_power_external_power_changed(struct power_supply *psy)
+{
+ struct rk818_charger *cg = power_supply_get_drvdata(psy);
+
+ power_supply_set_input_current_limit_from_supplier(cg->usb_psy);
+}
+
+static enum power_supply_property rk818_usb_power_props[] = {
+ POWER_SUPPLY_PROP_PRESENT,
+ POWER_SUPPLY_PROP_HEALTH,
+ POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
+ POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT,
+};
+
+static const struct power_supply_desc rk818_usb_desc = {
+ .name = "rk818-usb",
+ .type = POWER_SUPPLY_TYPE_USB,
+ .properties = rk818_usb_power_props,
+ .num_properties = ARRAY_SIZE(rk818_usb_power_props),
+ .property_is_writeable = rk818_usb_power_prop_writeable,
+ .get_property = rk818_usb_power_get_property,
+ .set_property = rk818_usb_power_set_property,
+ .external_power_changed = rk818_usb_power_external_power_changed,
+};
+
+// }}}
+// {{{ Charger supply
+
+static int rk818_charger_set_current_max(struct rk818_charger *cg, int val)
+{
+ unsigned reg;
+ int ret;
+
+ if (val < 1000000)
+ reg = 0;
+ else if (val < 3000000)
+ reg = (val - 1000000) / 200000;
+ else
+ reg = 10;
+
+ ret = regmap_update_bits(cg->regmap, RK818_CHRG_CTRL_REG1,
+ RK818_CHRG_CTRL_REG1_CHRG_CUR_SEL_MASK,
+ reg << RK818_CHRG_CTRL_REG1_CHRG_CUR_SEL_OFFSET);
+ if (ret)
+ dev_err(cg->dev,
+ "Charging max current setting failed (%d)\n", ret);
+
+ return ret;
+}
+
+static int rk818_charger_get_current_max(struct rk818_charger *cg, int *val)
+{
+ unsigned reg;
+ int ret;
+
+ ret = regmap_read(cg->regmap, RK818_CHRG_CTRL_REG1, &reg);
+ if (ret) {
+ dev_err(cg->dev,
+ "Charging max current getting failed (%d)\n", ret);
+ return ret;
+ }
+
+ reg &= RK818_CHRG_CTRL_REG1_CHRG_CUR_SEL_MASK;
+ reg >>= RK818_CHRG_CTRL_REG1_CHRG_CUR_SEL_OFFSET;
+
+ *val = 1000000 + reg * 200000;
+
+ return 0;
+}
+
+static int rk818_charger_set_voltage_max(struct rk818_charger *cg, int val)
+{
+ unsigned reg;
+ int ret;
+
+ if (val < 4050000)
+ reg = 0;
+ else if (val < 4350000)
+ reg = (val - 4050000) / 50000;
+ else
+ reg = 6;
+
+ ret = regmap_update_bits(cg->regmap, RK818_CHRG_CTRL_REG1,
+ RK818_CHRG_CTRL_REG1_CHRG_VOL_SEL_MASK,
+ reg << RK818_CHRG_CTRL_REG1_CHRG_VOL_SEL_OFFSET);
+ if (ret)
+ dev_err(cg->dev,
+ "Charging end voltage setting failed (%d)\n", ret);
+
+ return ret;
+}
+
+static int rk818_charger_get_voltage_max(struct rk818_charger *cg, int *val)
+{
+ unsigned reg;
+ int ret;
+
+ ret = regmap_read(cg->regmap, RK818_CHRG_CTRL_REG1, &reg);
+ if (ret) {
+ dev_err(cg->dev,
+ "Charging end voltage getting failed (%d)\n", ret);
+ return ret;
+ }
+
+ reg &= RK818_CHRG_CTRL_REG1_CHRG_VOL_SEL_MASK;
+ reg >>= RK818_CHRG_CTRL_REG1_CHRG_VOL_SEL_OFFSET;
+
+ *val = 4050000 + reg * 50000;
+
+ return 0;
+}
+
+static int rk818_charger_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct rk818_charger *cg = power_supply_get_drvdata(psy);
+ unsigned reg;
+ int ret;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_ONLINE:
+ ret = regmap_read(cg->regmap, RK818_CHRG_CTRL_REG1, &reg);
+ if (ret) {
+ dev_err(cg->dev, "failed to read the charger state (%d)\n", ret);
+ return ret;
+ }
+
+ val->intval = !!(reg & RK818_CHRG_CTRL_REG1_CHRG_EN);
+ break;
+
+ case POWER_SUPPLY_PROP_STATUS:
+ ret = regmap_read(cg->regmap, RK818_SUP_STS_REG, &reg);
+ if (ret)
+ return ret;
+
+ switch (reg & RK818_CHG_STS_MASK) {
+ case RK818_CHG_STS_WAKEUP_CUR:
+ case RK818_CHG_STS_TRICKLE_CUR:
+ case RK818_CHG_STS_CC_OR_CV:
+ val->intval = POWER_SUPPLY_STATUS_CHARGING;
+ break;
+ case RK818_CHG_STS_TERMINATED:
+ default:
+ val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
+ break;
+ }
+
+ break;
+
+ case POWER_SUPPLY_PROP_CHARGE_TYPE:
+ ret = regmap_read(cg->regmap, RK818_SUP_STS_REG, &reg);
+ if (ret)
+ return ret;
+
+ switch (reg & RK818_CHG_STS_MASK) {
+ case RK818_CHG_STS_WAKEUP_CUR:
+ case RK818_CHG_STS_TRICKLE_CUR:
+ val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
+ break;
+ case RK818_CHG_STS_CC_OR_CV:
+ val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
+ break;
+ case RK818_CHG_STS_TERMINATED:
+ val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
+ break;
+ default:
+ val->intval = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
+ break;
+ }
+
+ break;
+
+ case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
+ ret = regmap_read(cg->regmap, RK818_CHRG_CTRL_REG2, &reg);
+ if (ret)
+ return ret;
+
+ val->intval = 100000 + ((reg >> 6) & 3) * 50000;
+ break;
+
+ case POWER_SUPPLY_PROP_HEALTH:
+ ret = regmap_read(cg->regmap, RK818_SUP_STS_REG, &reg);
+ if (ret)
+ return ret;
+
+ switch (reg & RK818_CHG_STS_MASK) {
+ case RK818_CHG_STS_USB_OV:
+ val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+ break;
+ case RK818_CHG_STS_BAT_TEMP_FAULT:
+ val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
+ break;
+ case RK818_CHG_STS_TIMEOUT:
+ val->intval = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
+ break;
+ default:
+ val->intval = POWER_SUPPLY_HEALTH_GOOD;
+ break;
+ }
+
+ break;
+
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+ return rk818_charger_get_voltage_max(cg, &val->intval);
+
+ case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
+ ret = rk818_charger_get_current_max(cg, &val->intval);
+ val->intval /= 10;
+ return ret;
+
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+ return rk818_charger_get_current_max(cg, &val->intval);
+
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
+ val->intval = 4350000;
+ break;
+
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
+ val->intval = 3000000;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int rk818_charger_set_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ const union power_supply_propval *val)
+{
+ struct rk818_charger *cg = power_supply_get_drvdata(psy);
+ int ret;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_ONLINE:
+ ret = regmap_update_bits(cg->regmap, RK818_CHRG_CTRL_REG1,
+ RK818_CHRG_CTRL_REG1_CHRG_EN,
+ val->intval ? RK818_CHRG_CTRL_REG1_CHRG_EN : 0);
+ if (ret)
+ dev_err(cg->dev, "failed to setup the charger (%d)\n", ret);
+
+ return ret;
+
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+ return rk818_charger_set_voltage_max(cg, val->intval);
+
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+ return rk818_charger_set_current_max(cg, val->intval);
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static int rk818_charger_prop_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_ONLINE:
+ return 1;
+
+ default:
+ return 0;
+ }
+}
+
+static enum power_supply_property rk818_charger_props[] = {
+ POWER_SUPPLY_PROP_ONLINE,
+ POWER_SUPPLY_PROP_HEALTH,
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_CHARGE_TYPE,
+ POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
+ POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
+};
+
+/*
+ * TODO: This functionality should be in a battery driver/supply, but that one
+ * is such a mess, I don't want to touch it now. Let's have a separate supply
+ * for controlling the charger for now, and a prayer for the poor soul that
+ * will have to understand and clean up the battery driver.
+ */
+static const struct power_supply_desc rk818_charger_desc = {
+ .name = "rk818-charger",
+ .type = POWER_SUPPLY_TYPE_BATTERY,
+ .properties = rk818_charger_props,
+ .num_properties = ARRAY_SIZE(rk818_charger_props),
+ .property_is_writeable = rk818_charger_prop_writeable,
+ .get_property = rk818_charger_get_property,
+ .set_property = rk818_charger_set_property,
+};
+
+// }}}
+
+static int rk818_charger_probe(struct platform_device *pdev)
+{
+ struct rk808 *rk818 = dev_get_drvdata(pdev->dev.parent);
+ struct power_supply_config psy_cfg = { };
+ struct device *dev = &pdev->dev;
+ struct rk818_charger *cg;
+ int ret;
+
+ cg = devm_kzalloc(dev, sizeof(*cg), GFP_KERNEL);
+ if (!cg)
+ return -ENOMEM;
+
+ cg->rk818 = rk818;
+ cg->dev = dev;
+ cg->regmap = rk818->regmap;
+ platform_set_drvdata(pdev, cg);
+
+ psy_cfg.drv_data = cg;
+ psy_cfg.of_node = dev->of_node;
+
+ cg->usb_psy = devm_power_supply_register(dev, &rk818_usb_desc,
+ &psy_cfg);
+ if (IS_ERR(cg->usb_psy))
+ return dev_err_probe(dev, PTR_ERR(cg->usb_psy),
+ "register usb power supply fail\n");
+
+ cg->charger_psy = devm_power_supply_register(dev, &rk818_charger_desc,
+ &psy_cfg);
+ if (IS_ERR(cg->charger_psy))
+ return dev_err_probe(dev, PTR_ERR(cg->charger_psy),
+ "register charger power supply fail\n");
+
+ /* disable voltage limit and enable input current limit */
+ ret = regmap_update_bits(cg->regmap, RK818_SUP_STS_REG,
+ RK818_SUP_STS_USB_ILIM_EN | RK818_SUP_STS_USB_VLIM_EN,
+ RK818_SUP_STS_USB_ILIM_EN);
+ if (ret)
+ dev_warn(cg->dev, "failed to enable input current limit (%d)\n", ret);
+
+ /* make sure analog control loop is enabled */
+ ret = regmap_update_bits(cg->regmap, RK818_CHRG_CTRL_REG3,
+ RK818_CHRG_CTRL_REG3_CHRG_TERM_DIGITAL,
+ 0);
+ if (ret)
+ dev_warn(cg->dev, "failed to enable analog control loop (%d)\n", ret);
+
+ /* enable charger and set some reasonable limits on each boot */
+ ret = regmap_write(cg->regmap, RK818_CHRG_CTRL_REG1,
+ RK818_CHRG_CTRL_REG1_CHRG_EN
+ | (1) /* 1.2A */
+ | (5 << 4) /* 4.3V */);
+ if (ret)
+ dev_warn(cg->dev, "failed to enable charger (%d)\n", ret);
+
+ power_supply_set_input_current_limit_from_supplier(cg->usb_psy);
+
+ return 0;
+}
+
+static int rk818_charger_remove(struct platform_device *pdev)
+{
+ //struct rk818_charger *cg = platform_get_drvdata(pdev);
+
+ return 0;
+}
+
+static void rk818_charger_shutdown(struct platform_device *pdev)
+{
+}
+
+static int rk818_charger_suspend(struct platform_device *pdev,
+ pm_message_t state)
+{
+ return 0;
+}
+
+static int rk818_charger_resume(struct platform_device *pdev)
+{
+ return 0;
+}
+
+static const struct of_device_id rk818_charger_of_match[] = {
+ { .compatible = "rockchip,rk818-charger", },
+ { },
+};
+
+static struct platform_driver rk818_charger_driver = {
+ .probe = rk818_charger_probe,
+ .remove = rk818_charger_remove,
+ .suspend = rk818_charger_suspend,
+ .resume = rk818_charger_resume,
+ .shutdown = rk818_charger_shutdown,
+ .driver = {
+ .name = "rk818-charger",
+ .of_match_table = rk818_charger_of_match,
+ },
+};
+
+module_platform_driver(rk818_charger_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:rk818-charger");
+MODULE_AUTHOR("Ondřej Jirman <megi@xff.cz>");