[PATCH v2 1/3] adp5061: New driver for ADP5061 I2C battery charger

From: Stefan Popa
Date: Tue Apr 10 2018 - 05:51:12 EST

This patch adds basic support for Analog Devices I2C programmable linear
battery charger.

With this driver, some parameters can be read and configured such as:
* trickle charge current level
* trickle charge voltage threshold
* weak charge threshold
* constant current
* constant charge voltage limit
* battery full
* input current limit
* charger status
* battery status
* termination current

Datasheet:
http://www.analog.com/media/en/technical-documentation/data-sheets/ADP5061.pdf

Signed-off-by: Stefan Popa <stefan.popa@xxxxxxxxxx>
---
Changes in v2:
- Fixed typo in Kconfig file: build -> built

.../devicetree/bindings/power/supply/adp5061.txt | 17 +
MAINTAINERS | 8 +
drivers/power/supply/Kconfig | 11 +
drivers/power/supply/Makefile | 1 +
drivers/power/supply/adp5061.c | 745 +++++++++++++++++++++
5 files changed, 782 insertions(+)
create mode 100644 Documentation/devicetree/bindings/power/supply/adp5061.txt
create mode 100644 drivers/power/supply/adp5061.c

diff --git a/Documentation/devicetree/bindings/power/supply/adp5061.txt b/Documentation/devicetree/bindings/power/supply/adp5061.txt
new file mode 100644
index 0000000..7447446
--- /dev/null
+++ b/Documentation/devicetree/bindings/power/supply/adp5061.txt
@@ -0,0 +1,17 @@
+Analog Devices ADP5061 Programmable Linear Battery Charger Driver
+
+Required properties:
+ - compatible: should be "adi,adp5061"
+ - reg: i2c address of the device
+
+The node for this driver must be a child node of a I2C controller, hence
+all mandatory properties described in
+Documentation/devicetree/bindings/i2c/i2c.txt
+must be specified.
+
+Example:
+
+ adp5061@14 {
+ compatible = "adi,adp5061";
+ reg = <0x14>;
+ };
diff --git a/MAINTAINERS b/MAINTAINERS
index 3bdc260..a9ca73b 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -797,6 +797,14 @@ L: linux-media@xxxxxxxxxxxxxxx
S: Maintained
F: drivers/media/i2c/ad9389b*

+ANALOG DEVICES INC ADP5061 DRIVER
+M: Stefan Popa <stefan.popa@xxxxxxxxxx>
+L: linux-pm@xxxxxxxxxxxxxxx
+W: http://ez.analog.com/community/linux-device-drivers
+S: Supported
+F: Documentation/devicetree/bindings/power/supply/adp5061.txt
+F: drivers/power/supply/adp5061.c
+
ANALOG DEVICES INC ADV7180 DRIVER
M: Lars-Peter Clausen <lars@xxxxxxxxxx>
L: linux-media@xxxxxxxxxxxxxxx
diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig
index 428b426..4cc9aa9 100644
--- a/drivers/power/supply/Kconfig
+++ b/drivers/power/supply/Kconfig
@@ -75,6 +75,17 @@ config BATTERY_88PM860X
help
Say Y here to enable battery monitor for Marvell 88PM860x chip.

+config CHARGER_ADP5061
+ tristate "ADP5061 battery charger driver"
+ depends on I2C
+ select REGMAP_I2C
+ help
+ Say Y here to enable support for the ADP5061 standalone battery
+ charger.
+
+ This driver can be built as a module. If so, the module will be
+ called adp5061.
+
config BATTERY_ACT8945A
tristate "Active-semi ACT8945A charger driver"
depends on MFD_ACT8945A || COMPILE_TEST
diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile
index e83aa84..71b1398 100644
--- a/drivers/power/supply/Makefile
+++ b/drivers/power/supply/Makefile
@@ -18,6 +18,7 @@ obj-$(CONFIG_WM8350_POWER) += wm8350_power.o
obj-$(CONFIG_TEST_POWER) += test_power.o

obj-$(CONFIG_BATTERY_88PM860X) += 88pm860x_battery.o
+obj-$(CONFIG_CHARGER_ADP5061) += adp5061.o
obj-$(CONFIG_BATTERY_ACT8945A) += act8945a_charger.o
obj-$(CONFIG_BATTERY_AXP20X) += axp20x_battery.o
obj-$(CONFIG_CHARGER_AXP20X) += axp20x_ac_power.o
diff --git a/drivers/power/supply/adp5061.c b/drivers/power/supply/adp5061.c
new file mode 100644
index 0000000..c00a02e
--- /dev/null
+++ b/drivers/power/supply/adp5061.c
@@ -0,0 +1,745 @@
+/*
+ * ADP5061 I2C Programmable Linear Battery Charger
+ *
+ * Copyright 2018 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/delay.h>
+#include <linux/pm.h>
+#include <linux/mod_devicetable.h>
+#include <linux/power_supply.h>
+#include <linux/platform_device.h>
+#include <linux/of.h>
+#include <linux/regmap.h>
+
+/* ADP5061 registers definition */
+#define ADP5061_ID 0x00
+#define ADP5061_REV 0x01
+#define ADP5061_VINX_SET 0x02
+#define ADP5061_TERM_SET 0x03
+#define ADP5061_CHG_CURR 0x04
+#define ADP5061_VOLTAGE_TH 0x05
+#define ADP5061_TIMER_SET 0x06
+#define ADP5061_FUNC_SET_1 0x07
+#define ADP5061_FUNC_SET_2 0x08
+#define ADP5061_INT_EN 0x09
+#define ADP5061_INT_ACT 0x0A
+#define ADP5061_CHG_STATUS_1 0x0B
+#define ADP5061_CHG_STATUS_2 0x0C
+#define ADP5061_FAULT 0x0D
+#define ADP5061_BATTERY_SHORT 0x10
+#define ADP5061_IEND 0x11
+
+/* ADP5061_VINX_SET */
+#define ADP5061_VINX_SET_ILIM_MSK GENMASK(3, 0)
+#define ADP5061_VINX_SET_ILIM_MODE(x) (((x) & 0x0F) << 0)
+
+/* ADP5061_TERM_SET */
+#define ADP5061_TERM_SET_VTRM_MSK GENMASK(7, 2)
+#define ADP5061_TERM_SET_VTRM_MODE(x) (((x) & 0x3F) << 2)
+#define ADP5061_TERM_SET_CHG_VLIM_MSK GENMASK(1, 0)
+#define ADP5061_TERM_SET_CHG_VLIM_MODE(x) (((x) & 0x03) << 0)
+
+/* ADP5061_CHG_CURR */
+#define ADP5061_CHG_CURR_ICHG_MSK GENMASK(6, 2)
+#define ADP5061_CHG_CURR_ICHG_MODE(x) (((x) & 0x1F) << 2)
+#define ADP5061_CHG_CURR_ITRK_DEAD_MSK GENMASK(1, 0)
+#define ADP5061_CHG_CURR_ITRK_DEAD_MODE(x) (((x) & 0x03) << 0)
+
+/* ADP5061_VOLTAGE_TH */
+#define ADP5061_VOLTAGE_TH_DIS_RCH_MSK BIT(7)
+#define ADP5061_VOLTAGE_TH_DIS_RCH_MODE(x) (((x) & 0x01) << 7)
+#define ADP5061_VOLTAGE_TH_VRCH_MSK GENMASK(6, 5)
+#define ADP5061_VOLTAGE_TH_VRCH_MODE(x) (((x) & 0x03) << 5)
+#define ADP5061_VOLTAGE_TH_VTRK_DEAD_MSK GENMASK(4, 3)
+#define ADP5061_VOLTAGE_TH_VTRK_DEAD_MODE(x) (((x) & 0x03) << 3)
+#define ADP5061_VOLTAGE_TH_VWEAK_MSK GENMASK(2, 0)
+#define ADP5061_VOLTAGE_TH_VWEAK_MODE(x) (((x) & 0x07) << 0)
+
+/* ADP5061_CHG_STATUS_1 */
+#define ADP5061_CHG_STATUS_1_VIN_OV(x) (((x) >> 7) & 0x1)
+#define ADP5061_CHG_STATUS_1_VIN_OK(x) (((x) >> 6) & 0x1)
+#define ADP5061_CHG_STATUS_1_VIN_ILIM(x) (((x) >> 5) & 0x1)
+#define ADP5061_CHG_STATUS_1_THERM_LIM(x) (((x) >> 4) & 0x1)
+#define ADP5061_CHG_STATUS_1_CHDONE(x) (((x) >> 3) & 0x1)
+#define ADP5061_CHG_STATUS_1_CHG_STATUS(x) (((x) >> 0) & 0x7)
+
+/* ADP5061_CHG_STATUS_2 */
+#define ADP5061_CHG_STATUS_2_THR_STATUS(x) (((x) >> 5) & 0x7)
+#define ADP5061_CHG_STATUS_2_RCH_LIM_INFO(x) (((x) >> 3) & 0x1)
+#define ADP5061_CHG_STATUS_2_BAT_STATUS(x) (((x) >> 0) & 0x7)
+
+/* ADP5061_IEND */
+#define ADP5061_IEND_IEND_MSK GENMASK(7, 5)
+#define ADP5061_IEND_IEND_MODE(x) (((x) & 0x07) << 5)
+
+#define ADP5061_NO_BATTERY 0x01
+#define ADP5061_ICHG_MAX 1300 // mA
+
+enum adp5061_chg_status {
+ ADP5061_CHG_OFF,
+ ADP5061_CHG_TRICKLE,
+ ADP5061_CHG_FAST_CC,
+ ADP5061_CHG_FAST_CV,
+ ADP5061_CHG_COMPLETE,
+ ADP5061_CHG_LDO_MODE,
+ ADP5061_CHG_TIMER_EXP,
+ ADP5061_CHG_BAT_DET,
+};
+
+static const int adp5061_chg_type[4] = {
+ [ADP5061_CHG_OFF] = POWER_SUPPLY_CHARGE_TYPE_NONE,
+ [ADP5061_CHG_TRICKLE] = POWER_SUPPLY_CHARGE_TYPE_TRICKLE,
+ [ADP5061_CHG_FAST_CC] = POWER_SUPPLY_CHARGE_TYPE_FAST,
+ [ADP5061_CHG_FAST_CV] = POWER_SUPPLY_CHARGE_TYPE_FAST,
+};
+
+static const int adp5061_vweak_th[8] = {
+ 2700, 2800, 2900, 3000, 3100, 3200, 3300, 3400,
+};
+
+static const int adp5061_prechg_current[4] = {
+ 5, 10, 20, 80,
+};
+
+static const int adp5061_vmin[4] = {
+ 2000, 2500, 2600, 2900,
+};
+
+static const int adp5061_const_chg_vmax[4] = {
+ 3200, 3400, 3700, 3800,
+};
+
+static const int adp5061_const_ichg[24] = {
+ 50, 100, 150, 200, 250, 300, 350, 400, 450, 500, 550, 600, 650,
+ 700, 750, 800, 850, 900, 950, 1000, 1050, 1100, 1200, 1300,
+};
+
+static const int adp5061_vmax[36] = {
+ 3800, 3820, 3840, 3860, 3880, 3900, 3920, 3940, 3960, 3980,
+ 4000, 4020, 4040, 4060, 4080, 4100, 4120, 4140, 4160, 4180,
+ 4200, 4220, 4240, 4260, 4280, 4300, 4320, 4340, 4360, 4380,
+ 4400, 4420, 4440, 4460, 4480, 4500,
+};
+
+static const int adp5061_in_current_lim[16] = {
+ 100, 150, 200, 250, 300, 400, 500, 600, 700,
+ 800, 900, 1000, 1200, 1500, 1800, 2100,
+};
+
+static const int adp5061_iend[8] = {
+ 12500, 32500, 52500, 72500, 92500, 117500, 142500, 170000,
+};
+
+struct adp5061_state {
+ struct i2c_client *client;
+ struct regmap *regmap;
+ struct power_supply *psy;
+};
+
+static int adp5061_get_array_index(const int *array, u8 size, int val)
+{
+ int i;
+
+ for (i = 1; i < size; i++) {
+ if (val < array[i])
+ break;
+ }
+
+ return i-1;
+}
+
+static int adp5061_get_status(struct adp5061_state *st,
+ u8 *status1, u8 *status2)
+{
+ u8 buf[2];
+ int ret;
+
+ /* CHG_STATUS1 and CHG_STATUS2 are adjacent regs */
+ ret = regmap_bulk_read(st->regmap, ADP5061_CHG_STATUS_1,
+ &buf[0], 2);
+ if (ret < 0)
+ return ret;
+
+ *status1 = buf[0];
+ *status2 = buf[1];
+
+ return ret;
+}
+
+static int adp5061_get_input_current_limit(struct adp5061_state *st,
+ union power_supply_propval *val)
+{
+ unsigned int regval;
+ int mode, ret;
+
+ ret = regmap_read(st->regmap, ADP5061_VINX_SET, &regval);
+ if (ret < 0)
+ return ret;
+
+ mode = ADP5061_VINX_SET_ILIM_MODE(regval);
+ val->intval = adp5061_in_current_lim[mode] * 1000;
+
+ return ret;
+}
+
+static int adp5061_set_input_current_limit(struct adp5061_state *st, int val)
+{
+ int index;
+
+ /* Convert from uA to mA */
+ val /= 1000;
+ index = adp5061_get_array_index(adp5061_in_current_lim,
+ ARRAY_SIZE(adp5061_in_current_lim),
+ val);
+ if (index < 0)
+ return index;
+
+ return regmap_update_bits(st->regmap, ADP5061_VINX_SET,
+ ADP5061_VINX_SET_ILIM_MSK,
+ ADP5061_VINX_SET_ILIM_MODE(index));
+}
+
+static int adp5061_set_min_voltage(struct adp5061_state *st, int val)
+{
+ int index;
+
+ /* Convert from uV to mV */
+ val /= 1000;
+ index = adp5061_get_array_index(adp5061_vmin,
+ ARRAY_SIZE(adp5061_vmin),
+ val);
+ if (index < 0)
+ return index;
+
+ return regmap_update_bits(st->regmap, ADP5061_VOLTAGE_TH,
+ ADP5061_VOLTAGE_TH_VTRK_DEAD_MSK,
+ ADP5061_VOLTAGE_TH_VTRK_DEAD_MODE(index));
+}
+
+static int adp5061_get_min_voltage(struct adp5061_state *st,
+ union power_supply_propval *val)
+{
+ unsigned int regval;
+ int ret;
+
+ ret = regmap_read(st->regmap, ADP5061_VOLTAGE_TH, &regval);
+ if (ret < 0)
+ return ret;
+
+ regval = ((regval & ADP5061_VOLTAGE_TH_VTRK_DEAD_MSK) >> 3);
+ val->intval = adp5061_vmin[regval] * 1000;
+
+ return ret;
+}
+
+static int adp5061_get_chg_volt_lim(struct adp5061_state *st,
+ union power_supply_propval *val)
+{
+ unsigned int regval;
+ int mode, ret;
+
+ ret = regmap_read(st->regmap, ADP5061_TERM_SET, &regval);
+ if (ret < 0)
+ return ret;
+
+ mode = ADP5061_TERM_SET_CHG_VLIM_MODE(regval);
+ val->intval = adp5061_const_chg_vmax[mode] * 1000;
+
+ return ret;
+}
+
+static int adp5061_get_max_voltage(struct adp5061_state *st,
+ union power_supply_propval *val)
+{
+ unsigned int regval;
+ int ret;
+
+ ret = regmap_read(st->regmap, ADP5061_TERM_SET, &regval);
+ if (ret < 0)
+ return ret;
+
+ regval = ((regval & ADP5061_TERM_SET_VTRM_MSK) >> 2) - 0x0F;
+ if (regval > ARRAY_SIZE(adp5061_vmax))
+ regval = ARRAY_SIZE(adp5061_vmax);
+
+ val->intval = adp5061_vmax[regval] * 1000;
+
+ return ret;
+}
+
+static int adp5061_set_max_voltage(struct adp5061_state *st, int val)
+{
+ int vmax_index;
+
+ /* Convert from uV to mV */
+ val /= 1000;
+ if (val > 4500)
+ val = 4500;
+
+ vmax_index = adp5061_get_array_index(adp5061_vmax,
+ ARRAY_SIZE(adp5061_vmax), val);
+ if (vmax_index < 0)
+ return vmax_index;
+
+ vmax_index += 0x0F;
+
+ return regmap_update_bits(st->regmap, ADP5061_TERM_SET,
+ ADP5061_TERM_SET_VTRM_MSK,
+ ADP5061_TERM_SET_VTRM_MODE(vmax_index));
+}
+
+static int adp5061_set_const_chg_vmax(struct adp5061_state *st, int val)
+{
+ int index;
+
+ /* Convert from uV to mV */
+ val /= 1000;
+ index = adp5061_get_array_index(adp5061_const_chg_vmax,
+ ARRAY_SIZE(adp5061_const_chg_vmax),
+ val);
+ if (index < 0)
+ return index;
+
+ return regmap_update_bits(st->regmap, ADP5061_TERM_SET,
+ ADP5061_TERM_SET_CHG_VLIM_MSK,
+ ADP5061_TERM_SET_CHG_VLIM_MODE(index));
+}
+
+static int adp5061_set_const_chg_current(struct adp5061_state *st, int val)
+{
+
+ int index;
+
+ /* Convert from uA to mA */
+ val /= 1000;
+ if (val > ADP5061_ICHG_MAX)
+ val = ADP5061_ICHG_MAX;
+
+ index = adp5061_get_array_index(adp5061_const_ichg,
+ ARRAY_SIZE(adp5061_const_ichg),
+ val);
+ if (index < 0)
+ return index;
+
+ return regmap_update_bits(st->regmap, ADP5061_CHG_CURR,
+ ADP5061_CHG_CURR_ICHG_MSK,
+ ADP5061_CHG_CURR_ICHG_MODE(index));
+}
+
+static int adp5061_get_const_chg_current(struct adp5061_state *st,
+ union power_supply_propval *val)
+{
+ unsigned int regval;
+ int ret;
+
+ ret = regmap_read(st->regmap, ADP5061_CHG_CURR, &regval);
+ if (ret < 0)
+ return ret;
+
+ regval = ((regval & ADP5061_CHG_CURR_ICHG_MSK) >> 2);
+ if (regval > ARRAY_SIZE(adp5061_const_ichg))
+ regval = ARRAY_SIZE(adp5061_const_ichg);
+
+ val->intval = adp5061_const_ichg[regval] * 1000;
+
+ return ret;
+}
+
+static int adp5061_get_prechg_current(struct adp5061_state *st,
+ union power_supply_propval *val)
+{
+ unsigned int regval;
+ int ret;
+
+ ret = regmap_read(st->regmap, ADP5061_CHG_CURR, &regval);
+ if (ret < 0)
+ return ret;
+
+ regval &= ADP5061_CHG_CURR_ITRK_DEAD_MSK;
+ val->intval = adp5061_prechg_current[regval] * 1000;
+
+ return ret;
+}
+
+static int adp5061_set_prechg_current(struct adp5061_state *st, int val)
+{
+ int index;
+
+ /* Convert from uA to mA */
+ val /= 1000;
+ index = adp5061_get_array_index(adp5061_prechg_current,
+ ARRAY_SIZE(adp5061_prechg_current),
+ val);
+ if (index < 0)
+ return index;
+
+ return regmap_update_bits(st->regmap, ADP5061_CHG_CURR,
+ ADP5061_CHG_CURR_ITRK_DEAD_MSK,
+ ADP5061_CHG_CURR_ITRK_DEAD_MODE(index));
+}
+
+static int adp5061_get_vweak_th(struct adp5061_state *st,
+ union power_supply_propval *val)
+{
+ unsigned int regval;
+ int ret;
+
+ ret = regmap_read(st->regmap, ADP5061_VOLTAGE_TH, &regval);
+ if (ret < 0)
+ return ret;
+
+ regval &= ADP5061_VOLTAGE_TH_VWEAK_MSK;
+ val->intval = adp5061_vweak_th[regval] * 1000;
+
+ return ret;
+}
+
+static int adp5061_set_vweak_th(struct adp5061_state *st, int val)
+{
+ int index;
+
+ /* Convert from uV to mV */
+ val /= 1000;
+ index = adp5061_get_array_index(adp5061_vweak_th,
+ ARRAY_SIZE(adp5061_vweak_th),
+ val);
+ if (index < 0)
+ return index;
+
+ return regmap_update_bits(st->regmap, ADP5061_VOLTAGE_TH,
+ ADP5061_VOLTAGE_TH_VWEAK_MSK,
+ ADP5061_VOLTAGE_TH_VWEAK_MODE(index));
+}
+
+static int adp5061_get_chg_type(struct adp5061_state *st,
+ union power_supply_propval *val)
+{
+ u8 status1, status2;
+ int chg_type, ret;
+
+ ret = adp5061_get_status(st, &status1, &status2);
+ if (ret < 0)
+ return ret;
+
+ chg_type = adp5061_chg_type[ADP5061_CHG_STATUS_1_CHG_STATUS(status1)];
+ if (chg_type > ADP5061_CHG_FAST_CV)
+ val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
+ else
+ val->intval = chg_type;
+
+ return ret;
+}
+
+static int adp5061_get_charger_status(struct adp5061_state *st,
+ union power_supply_propval *val)
+{
+ u8 status1, status2;
+ int ret;
+
+ ret = adp5061_get_status(st, &status1, &status2);
+ if (ret < 0)
+ return ret;
+
+ switch (ADP5061_CHG_STATUS_1_CHG_STATUS(status1)) {
+ case ADP5061_CHG_OFF:
+ val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
+ break;
+ case ADP5061_CHG_TRICKLE:
+ case ADP5061_CHG_FAST_CC:
+ case ADP5061_CHG_FAST_CV:
+ val->intval = POWER_SUPPLY_STATUS_CHARGING;
+ break;
+ case ADP5061_CHG_COMPLETE:
+ val->intval = POWER_SUPPLY_STATUS_FULL;
+ break;
+ case ADP5061_CHG_TIMER_EXP:
+ /* The battery must be discharging if there is a charge fault */
+ val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
+ break;
+ default:
+ val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
+ }
+
+ return ret;
+}
+
+static int adp5061_get_battery_status(struct adp5061_state *st,
+ union power_supply_propval *val)
+{
+ u8 status1, status2;
+ int ret;
+
+ ret = adp5061_get_status(st, &status1, &status2);
+ if (ret < 0)
+ return ret;
+
+ switch (ADP5061_CHG_STATUS_2_BAT_STATUS(status2)) {
+ case 0x0: /* Battery monitor off */
+ case 0x1: /* No battery */
+ val->intval = POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN;
+ break;
+ case 0x2: /* VBAT < VTRK */
+ val->intval = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
+ break;
+ case 0x3: /* VTRK < VBAT_SNS < VWEAK */
+ val->intval = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
+ break;
+ case 0x4: /* VBAT_SNS > VWEAK */
+ val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
+ break;
+ }
+
+ return ret;
+}
+
+static int adp5061_get_termination_current(struct adp5061_state *st,
+ union power_supply_propval *val)
+{
+ unsigned int regval;
+ int ret;
+
+ ret = regmap_read(st->regmap, ADP5061_IEND, &regval);
+ if (ret < 0)
+ return ret;
+
+ regval = (regval & ADP5061_IEND_IEND_MSK) >> 5;
+ val->intval = adp5061_iend[regval];
+
+ return ret;
+}
+
+static int adp5061_set_termination_current(struct adp5061_state *st, int val)
+{
+ int index;
+
+ index = adp5061_get_array_index(adp5061_iend,
+ ARRAY_SIZE(adp5061_iend),
+ val);
+ if (index < 0)
+ return index;
+
+ return regmap_update_bits(st->regmap, ADP5061_IEND,
+ ADP5061_IEND_IEND_MSK,
+ ADP5061_IEND_IEND_MODE(index));
+}
+
+static int adp5061_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct adp5061_state *st = power_supply_get_drvdata(psy);
+ u8 status1, status2;
+ int mode, ret;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_PRESENT:
+ ret = adp5061_get_status(st, &status1, &status2);
+ if (ret < 0)
+ return ret;
+
+ mode = ADP5061_CHG_STATUS_2_BAT_STATUS(status2);
+ if (mode == ADP5061_NO_BATTERY)
+ val->intval = 0;
+ else
+ val->intval = 1;
+ break;
+ case POWER_SUPPLY_PROP_CHARGE_TYPE:
+ return adp5061_get_chg_type(st, val);
+ case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+ /* This property is used to indicate the input current
+ * limit into VINx (ILIM)
+ */
+ return adp5061_get_input_current_limit(st, val);
+ case POWER_SUPPLY_PROP_VOLTAGE_MAX:
+ /* This property is used to indicate the termination
+ * voltage (VTRM)
+ */
+ return adp5061_get_max_voltage(st, val);
+ case POWER_SUPPLY_PROP_VOLTAGE_MIN:
+ /*
+ * This property is used to indicate the trickle to fast
+ * charge threshold (VTRK_DEAD)
+ */
+ return adp5061_get_min_voltage(st, val);
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
+ /* This property is used to indicate the charging
+ * voltage limit (CHG_VLIM)
+ */
+ return adp5061_get_chg_volt_lim(st, val);
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+ /*
+ * This property is used to indicate the value of the constant
+ * current charge (ICHG)
+ */
+ return adp5061_get_const_chg_current(st, val);
+ case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
+ /*
+ * This property is used to indicate the value of the trickle
+ * and weak charge currents (ITRK_DEAD)
+ */
+ return adp5061_get_prechg_current(st, val);
+ case POWER_SUPPLY_PROP_VOLTAGE_AVG:
+ /*
+ * This property is used to set the VWEAK threshold
+ * bellow this value, weak charge mode is entered
+ * above this value, fast chargerge mode is entered
+ */
+ return adp5061_get_vweak_th(st, val);
+ case POWER_SUPPLY_PROP_STATUS:
+ /*
+ * Indicate the charger status in relation to power
+ * supply status property
+ */
+ return adp5061_get_charger_status(st, val);
+ case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
+ /*
+ * Indicate the battery status in relation to power
+ * supply capacity level property
+ */
+ return adp5061_get_battery_status(st, val);
+ case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
+ /* Indicate the values of the termination current */
+ return adp5061_get_termination_current(st, val);
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int adp5061_set_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ const union power_supply_propval *val)
+{
+ struct adp5061_state *st = power_supply_get_drvdata(psy);
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+ return adp5061_set_input_current_limit(st, val->intval);
+ case POWER_SUPPLY_PROP_VOLTAGE_MAX:
+ return adp5061_set_max_voltage(st, val->intval);
+ case POWER_SUPPLY_PROP_VOLTAGE_MIN:
+ return adp5061_set_min_voltage(st, val->intval);
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
+ return adp5061_set_const_chg_vmax(st, val->intval);
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+ return adp5061_set_const_chg_current(st, val->intval);
+ case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
+ return adp5061_set_prechg_current(st, val->intval);
+ case POWER_SUPPLY_PROP_VOLTAGE_AVG:
+ return adp5061_set_vweak_th(st, val->intval);
+ case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
+ return adp5061_set_termination_current(st, val->intval);
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int adp5061_prop_writeable(struct power_supply *psy,
+ enum power_supply_property psp)
+{
+ switch (psp) {
+ case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+ case POWER_SUPPLY_PROP_VOLTAGE_MAX:
+ case POWER_SUPPLY_PROP_VOLTAGE_MIN:
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
+ case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+ case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
+ case POWER_SUPPLY_PROP_VOLTAGE_AVG:
+ case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
+ return 1;
+ default:
+ return 0;
+ }
+}
+
+static enum power_supply_property adp5061_props[] = {
+ POWER_SUPPLY_PROP_PRESENT,
+ POWER_SUPPLY_PROP_CHARGE_TYPE,
+ POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
+ POWER_SUPPLY_PROP_VOLTAGE_MAX,
+ POWER_SUPPLY_PROP_VOLTAGE_MIN,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
+ POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
+ POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
+ POWER_SUPPLY_PROP_VOLTAGE_AVG,
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_CAPACITY_LEVEL,
+ POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
+};
+
+static const struct regmap_config adp5061_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+};
+
+static const struct power_supply_desc adp5061_desc = {
+ .name = "adp5061",
+ .type = POWER_SUPPLY_TYPE_USB,
+ .get_property = adp5061_get_property,
+ .set_property = adp5061_set_property,
+ .property_is_writeable = adp5061_prop_writeable,
+ .properties = adp5061_props,
+ .num_properties = ARRAY_SIZE(adp5061_props),
+};
+
+static int adp5061_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct power_supply_config psy_cfg = {};
+ struct adp5061_state *st;
+
+ st = devm_kzalloc(&client->dev, sizeof(*st), GFP_KERNEL);
+ if (!st)
+ return -ENOMEM;
+
+ st->client = client;
+ st->regmap = devm_regmap_init_i2c(client,
+ &adp5061_regmap_config);
+ if (IS_ERR(st->regmap)) {
+ dev_err(&client->dev, "Failed to initialize register map\n");
+ return -EINVAL;
+ }
+
+ i2c_set_clientdata(client, st);
+ psy_cfg.drv_data = st;
+
+ st->psy = devm_power_supply_register(&client->dev,
+ &adp5061_desc,
+ &psy_cfg);
+
+ if (IS_ERR(st->psy)) {
+ dev_err(&client->dev, "Failed to register power supply\n");
+ return PTR_ERR(st->psy);
+ }
+
+ return 0;
+}
+
+static const struct i2c_device_id adp5061_id[] = {
+ { "adp5061", 0},
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, adp5061_id);
+
+static struct i2c_driver adp5061_driver = {
+ .driver = {
+ .name = KBUILD_MODNAME,
+ },
+ .probe = adp5061_probe,
+ .id_table = adp5061_id,
+};
+module_i2c_driver(adp5061_driver);
+
+MODULE_DESCRIPTION("Analog Devices adp5061 battery charger driver");
+MODULE_AUTHOR("Stefan Popa <stefan.popa@xxxxxxxxxx>");
+MODULE_LICENSE("GPL v2");
--
2.7.4