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Message-Id: <20250830-max77705_77976_charger_improvement-v1-3-e976db3fd432@gmail.com>
Date: Sat, 30 Aug 2025 23:45:16 +0300
From: Dzmitry Sankouski <dsankouski@...il.com>
To: Chanwoo Choi <cw00.choi@...sung.com>,
Krzysztof Kozlowski <krzk@...nel.org>, Lee Jones <lee@...nel.org>,
Sebastian Reichel <sre@...nel.org>,
Luca Ceresoli <luca.ceresoli@...tlin.com>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
Sebastian Reichel <sebastian.reichel@...labora.com>,
linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
Dzmitry Sankouski <dsankouski@...il.com>
Subject: [PATCH 3/9] power: supply: max77705_charger: use regfields for
config registers
Using regfields allows to cleanup masks and register offset definition,
allowing to access register info by it's functional name.
Signed-off-by: Dzmitry Sankouski <dsankouski@...il.com>
---
drivers/power/supply/max77705_charger.c | 105 ++++++++++++--------------------
include/linux/power/max77705_charger.h | 99 ++++++++++++++++--------------
2 files changed, 92 insertions(+), 112 deletions(-)
diff --git a/drivers/power/supply/max77705_charger.c b/drivers/power/supply/max77705_charger.c
index 7855f890e0a9..29bb763e56be 100644
--- a/drivers/power/supply/max77705_charger.c
+++ b/drivers/power/supply/max77705_charger.c
@@ -74,8 +74,7 @@ static int max77705_charger_enable(struct max77705_charger_data *chg)
{
int rv;
- rv = regmap_update_bits(chg->regmap, MAX77705_CHG_REG_CNFG_09,
- MAX77705_CHG_EN_MASK, MAX77705_CHG_EN_MASK);
+ rv = regmap_field_write(chg->rfield[MAX77705_CHG_EN], 1);
if (rv)
dev_err(chg->dev, "unable to enable the charger: %d\n", rv);
@@ -87,10 +86,7 @@ static void max77705_charger_disable(void *data)
struct max77705_charger_data *chg = data;
int rv;
- rv = regmap_update_bits(chg->regmap,
- MAX77705_CHG_REG_CNFG_09,
- MAX77705_CHG_EN_MASK,
- MAX77705_CHG_DISABLE);
+ rv = regmap_field_write(chg->rfield[MAX77705_CHG_EN], MAX77705_CHG_DISABLE);
if (rv)
dev_err(chg->dev, "unable to disable the charger: %d\n", rv);
}
@@ -134,10 +130,10 @@ static int max77705_check_battery(struct max77705_charger_data *chg, int *val)
static int max77705_get_charge_type(struct max77705_charger_data *chg, int *val)
{
struct regmap *regmap = chg->regmap;
- unsigned int reg_data;
+ unsigned int reg_data, chg_en;
- regmap_read(regmap, MAX77705_CHG_REG_CNFG_09, ®_data);
- if (!MAX77705_CHARGER_CHG_CHARGING(reg_data)) {
+ regmap_field_read(chg->rfield[MAX77705_CHG_EN], &chg_en);
+ if (!chg_en) {
*val = POWER_SUPPLY_CHARGE_TYPE_NONE;
return 0;
}
@@ -162,10 +158,10 @@ static int max77705_get_charge_type(struct max77705_charger_data *chg, int *val)
static int max77705_get_status(struct max77705_charger_data *chg, int *val)
{
struct regmap *regmap = chg->regmap;
- unsigned int reg_data;
+ unsigned int reg_data, chg_en;
- regmap_read(regmap, MAX77705_CHG_REG_CNFG_09, ®_data);
- if (!MAX77705_CHARGER_CHG_CHARGING(reg_data)) {
+ regmap_field_read(chg->rfield[MAX77705_CHG_EN], &chg_en);
+ if (!chg_en) {
*val = POWER_SUPPLY_CHARGE_TYPE_NONE;
return 0;
}
@@ -295,16 +291,11 @@ static int max77705_get_input_current(struct max77705_charger_data *chg,
{
unsigned int reg_data;
int get_current = 0;
- struct regmap *regmap = chg->regmap;
- regmap_read(regmap, MAX77705_CHG_REG_CNFG_09, ®_data);
-
- reg_data &= MAX77705_CHG_CHGIN_LIM_MASK;
+ regmap_field_read(chg->rfield[MAX77705_CHG_CHGIN_LIM], ®_data);
if (reg_data <= 3)
get_current = MAX77705_CURRENT_CHGIN_MIN;
- else if (reg_data >= MAX77705_CHG_CHGIN_LIM_MASK)
- get_current = MAX77705_CURRENT_CHGIN_MAX;
else
get_current = (reg_data + 1) * MAX77705_CURRENT_CHGIN_STEP;
@@ -317,10 +308,8 @@ static int max77705_get_charge_current(struct max77705_charger_data *chg,
int *val)
{
unsigned int reg_data;
- struct regmap *regmap = chg->regmap;
- regmap_read(regmap, MAX77705_CHG_REG_CNFG_02, ®_data);
- reg_data &= MAX77705_CHG_CC;
+ regmap_field_read(chg->rfield[MAX77705_CHG_CC_LIM], ®_data);
*val = reg_data <= 0x2 ? MAX77705_CURRENT_CHGIN_MIN : reg_data * MAX77705_CURRENT_CHG_STEP;
@@ -332,7 +321,6 @@ static int max77705_set_float_voltage(struct max77705_charger_data *chg,
{
int float_voltage_mv;
unsigned int reg_data = 0;
- struct regmap *regmap = chg->regmap;
float_voltage_mv = float_voltage / 1000;
reg_data = float_voltage_mv <= 4000 ? 0x0 :
@@ -340,9 +328,7 @@ static int max77705_set_float_voltage(struct max77705_charger_data *chg,
(float_voltage_mv <= 4200) ? (float_voltage_mv - 4000) / 50 :
(((float_voltage_mv - 4200) / 10) + 0x04);
- return regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_04,
- MAX77705_CHG_CV_PRM_MASK,
- (reg_data << MAX77705_CHG_CV_PRM_SHIFT));
+ return regmap_field_write(chg->rfield[MAX77705_CHG_CV_PRM], reg_data);
}
static int max77705_get_float_voltage(struct max77705_charger_data *chg,
@@ -350,10 +336,8 @@ static int max77705_get_float_voltage(struct max77705_charger_data *chg,
{
unsigned int reg_data = 0;
int voltage_mv;
- struct regmap *regmap = chg->regmap;
- regmap_read(regmap, MAX77705_CHG_REG_CNFG_04, ®_data);
- reg_data &= MAX77705_CHG_PRM_MASK;
+ regmap_field_read(chg->rfield[MAX77705_CHG_CV_PRM], ®_data);
voltage_mv = reg_data <= 0x04 ? reg_data * 50 + 4000 :
(reg_data - 4) * 10 + 4200;
*val = voltage_mv * 1000;
@@ -418,7 +402,6 @@ static void max77705_chgin_isr_work(struct work_struct *work)
static void max77705_charger_initialize(struct max77705_charger_data *chg)
{
- u8 reg_data;
struct power_supply_battery_info *info;
struct regmap *regmap = chg->regmap;
@@ -429,45 +412,31 @@ static void max77705_charger_initialize(struct max77705_charger_data *chg)
/* unlock charger setting protect */
/* slowest LX slope */
- reg_data = MAX77705_CHGPROT_MASK | MAX77705_SLOWEST_LX_SLOPE;
- regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_06, reg_data,
- reg_data);
+ regmap_field_write(chg->rfield[MAX77705_CHGPROT], MAX77705_CHGPROT_MASK);
+ regmap_field_write(chg->rfield[MAX77705_LX_SLOPE], MAX77705_SLOWEST_LX_SLOPE);
/* fast charge timer disable */
/* restart threshold disable */
/* pre-qual charge disable */
- reg_data = (MAX77705_FCHGTIME_DISABLE << MAX77705_FCHGTIME_SHIFT) |
- (MAX77705_CHG_RSTRT_DISABLE << MAX77705_CHG_RSTRT_SHIFT) |
- (MAX77705_CHG_PQEN_DISABLE << MAX77705_PQEN_SHIFT);
- regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_01,
- (MAX77705_FCHGTIME_MASK |
- MAX77705_CHG_RSTRT_MASK |
- MAX77705_PQEN_MASK),
- reg_data);
-
- /* OTG off(UNO on), boost off */
- regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_00,
- MAX77705_OTG_CTRL, 0);
+ regmap_field_write(chg->rfield[MAX77705_FCHGTIME], MAX77705_FCHGTIME_DISABLE);
+ regmap_field_write(chg->rfield[MAX77705_CHG_RSTRT], MAX77705_CHG_RSTRT_DISABLE);
+ regmap_field_write(chg->rfield[MAX77705_CHG_PQEN], MAX77705_CHG_PQEN_DISABLE);
+
+ regmap_field_write(chg->rfield[MAX77705_MODE],
+ MAX77705_CHG_MASK | MAX77705_BUCK_MASK);
/* charge current 450mA(default) */
/* otg current limit 900mA */
- regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_02,
- MAX77705_OTG_ILIM_MASK,
- MAX77705_OTG_ILIM_900 << MAX77705_OTG_ILIM_SHIFT);
+ regmap_field_write(chg->rfield[MAX77705_OTG_ILIM], MAX77705_OTG_ILIM_900);
/* BAT to SYS OCP 4.80A */
- regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_05,
- MAX77705_REG_B2SOVRC_MASK,
- MAX77705_B2SOVRC_4_8A << MAX77705_REG_B2SOVRC_SHIFT);
+ regmap_field_write(chg->rfield[MAX77705_REG_B2SOVRC], MAX77705_B2SOVRC_4_8A);
+
/* top off current 150mA */
/* top off timer 30min */
- reg_data = (MAX77705_TO_ITH_150MA << MAX77705_TO_ITH_SHIFT) |
- (MAX77705_TO_TIME_30M << MAX77705_TO_TIME_SHIFT) |
- (MAX77705_SYS_TRACK_DISABLE << MAX77705_SYS_TRACK_DIS_SHIFT);
- regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_03,
- (MAX77705_TO_ITH_MASK |
- MAX77705_TO_TIME_MASK |
- MAX77705_SYS_TRACK_DIS_MASK), reg_data);
+ regmap_field_write(chg->rfield[MAX77705_TO], MAX77705_TO_ITH_150MA);
+ regmap_field_write(chg->rfield[MAX77705_TO_TIME], MAX77705_TO_TIME_30M);
+ regmap_field_write(chg->rfield[MAX77705_SYS_TRACK], MAX77705_SYS_TRACK_DISABLE);
/* cv voltage 4.2V or 4.35V */
/* MINVSYS 3.6V(default) */
@@ -478,25 +447,21 @@ static void max77705_charger_initialize(struct max77705_charger_data *chg)
max77705_set_float_voltage(chg, info->voltage_max_design_uv);
}
- regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_12,
- MAX77705_VCHGIN_REG_MASK, MAX77705_VCHGIN_4_5);
- regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_12,
- MAX77705_WCIN_REG_MASK, MAX77705_WCIN_4_5);
+ regmap_field_write(chg->rfield[MAX77705_VCHGIN], MAX77705_VCHGIN_4_5);
+ regmap_field_write(chg->rfield[MAX77705_WCIN], MAX77705_WCIN_4_5);
/* Watchdog timer */
regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_00,
MAX77705_WDTEN_MASK, 0);
/* VBYPSET=5.0V */
- regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_11, MAX77705_VBYPSET_MASK, 0);
+ regmap_field_write(chg->rfield[MAX77705_VBYPSET], 0);
/* Switching Frequency : 1.5MHz */
- regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_08, MAX77705_REG_FSW_MASK,
- (MAX77705_CHG_FSW_1_5MHz << MAX77705_REG_FSW_SHIFT));
+ regmap_field_write(chg->rfield[MAX77705_REG_FSW], MAX77705_CHG_FSW_1_5MHz);
/* Auto skip mode */
- regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_12, MAX77705_REG_DISKIP_MASK,
- (MAX77705_AUTO_SKIP << MAX77705_REG_DISKIP_SHIFT));
+ regmap_field_write(chg->rfield[MAX77705_REG_DISKIP], MAX77705_AUTO_SKIP);
}
static int max77705_charger_probe(struct i2c_client *i2c)
@@ -520,6 +485,14 @@ static int max77705_charger_probe(struct i2c_client *i2c)
if (IS_ERR(chg->regmap))
return PTR_ERR(chg->regmap);
+ for (int i = 0; i < MAX77705_N_REGMAP_FIELDS; i++) {
+ chg->rfield[i] = devm_regmap_field_alloc(dev, chg->regmap,
+ max77705_reg_field[i]);
+ if (IS_ERR(chg->rfield[i]))
+ return dev_err_probe(dev, PTR_ERR(chg->rfield[i]),
+ "cannot allocate regmap field\n");
+ }
+
ret = regmap_update_bits(chg->regmap,
MAX77705_CHG_REG_INT_MASK,
MAX77705_CHGIN_IM, 0);
diff --git a/include/linux/power/max77705_charger.h b/include/linux/power/max77705_charger.h
index fdec9af9c541..aec908ac5c01 100644
--- a/include/linux/power/max77705_charger.h
+++ b/include/linux/power/max77705_charger.h
@@ -9,6 +9,8 @@
#ifndef __MAX77705_CHARGER_H
#define __MAX77705_CHARGER_H __FILE__
+#include <linux/regmap.h>
+
/* MAX77705_CHG_REG_CHG_INT */
#define MAX77705_BYP_I BIT(0)
#define MAX77705_INP_LIMIT_I BIT(1)
@@ -63,7 +65,6 @@
#define MAX77705_BUCK_SHIFT 2
#define MAX77705_BOOST_SHIFT 3
#define MAX77705_WDTEN_SHIFT 4
-#define MAX77705_MODE_MASK GENMASK(3, 0)
#define MAX77705_CHG_MASK BIT(MAX77705_CHG_SHIFT)
#define MAX77705_UNO_MASK BIT(MAX77705_UNO_SHIFT)
#define MAX77705_OTG_MASK BIT(MAX77705_OTG_SHIFT)
@@ -74,34 +75,19 @@
#define MAX77705_OTG_CTRL (MAX77705_OTG_MASK | MAX77705_BOOST_MASK)
/* MAX77705_CHG_REG_CNFG_01 */
-#define MAX77705_FCHGTIME_SHIFT 0
-#define MAX77705_FCHGTIME_MASK GENMASK(2, 0)
-#define MAX77705_CHG_RSTRT_SHIFT 4
-#define MAX77705_CHG_RSTRT_MASK GENMASK(5, 4)
#define MAX77705_FCHGTIME_DISABLE 0
#define MAX77705_CHG_RSTRT_DISABLE 0x3
-#define MAX77705_PQEN_SHIFT 7
-#define MAX77705_PQEN_MASK BIT(7)
#define MAX77705_CHG_PQEN_DISABLE 0
#define MAX77705_CHG_PQEN_ENABLE 1
/* MAX77705_CHG_REG_CNFG_02 */
-#define MAX77705_OTG_ILIM_SHIFT 6
-#define MAX77705_OTG_ILIM_MASK GENMASK(7, 6)
#define MAX77705_OTG_ILIM_500 0
#define MAX77705_OTG_ILIM_900 1
#define MAX77705_OTG_ILIM_1200 2
#define MAX77705_OTG_ILIM_1500 3
-#define MAX77705_CHG_CC GENMASK(5, 0)
/* MAX77705_CHG_REG_CNFG_03 */
-#define MAX77705_TO_ITH_SHIFT 0
-#define MAX77705_TO_ITH_MASK GENMASK(2, 0)
-#define MAX77705_TO_TIME_SHIFT 3
-#define MAX77705_TO_TIME_MASK GENMASK(5, 3)
-#define MAX77705_SYS_TRACK_DIS_SHIFT 7
-#define MAX77705_SYS_TRACK_DIS_MASK BIT(7)
#define MAX77705_TO_ITH_150MA 0
#define MAX77705_TO_TIME_30M 3
#define MAX77705_SYS_TRACK_ENABLE 0
@@ -110,15 +96,8 @@
/* MAX77705_CHG_REG_CNFG_04 */
#define MAX77705_CHG_MINVSYS_SHIFT 6
#define MAX77705_CHG_MINVSYS_MASK GENMASK(7, 6)
-#define MAX77705_CHG_PRM_SHIFT 0
-#define MAX77705_CHG_PRM_MASK GENMASK(5, 0)
-
-#define MAX77705_CHG_CV_PRM_SHIFT 0
-#define MAX77705_CHG_CV_PRM_MASK GENMASK(5, 0)
/* MAX77705_CHG_REG_CNFG_05 */
-#define MAX77705_REG_B2SOVRC_SHIFT 0
-#define MAX77705_REG_B2SOVRC_MASK GENMASK(3, 0)
#define MAX77705_B2SOVRC_DISABLE 0
#define MAX77705_B2SOVRC_4_5A 6
#define MAX77705_B2SOVRC_4_8A 8
@@ -130,7 +109,7 @@
#define MAX77705_WDTCLR 1
#define MAX77705_CHGPROT_MASK GENMASK(3, 2)
#define MAX77705_CHGPROT_UNLOCKED GENMASK(3, 2)
-#define MAX77705_SLOWEST_LX_SLOPE GENMASK(6, 5)
+#define MAX77705_SLOWEST_LX_SLOPE 3
/* MAX77705_CHG_REG_CNFG_07 */
#define MAX77705_CHG_FMBST 4
@@ -140,36 +119,14 @@
#define MAX77705_REG_FGSRC_MASK BIT(MAX77705_REG_FGSRC_SHIFT)
/* MAX77705_CHG_REG_CNFG_08 */
-#define MAX77705_REG_FSW_SHIFT 0
-#define MAX77705_REG_FSW_MASK GENMASK(1, 0)
#define MAX77705_CHG_FSW_3MHz 0
#define MAX77705_CHG_FSW_2MHz 1
#define MAX77705_CHG_FSW_1_5MHz 2
/* MAX77705_CHG_REG_CNFG_09 */
-#define MAX77705_CHG_CHGIN_LIM_MASK GENMASK(6, 0)
-#define MAX77705_CHG_EN_MASK BIT(7)
#define MAX77705_CHG_DISABLE 0
-#define MAX77705_CHARGER_CHG_CHARGING(_reg) \
- (((_reg) & MAX77705_CHG_EN_MASK) > 1)
-
-
-/* MAX77705_CHG_REG_CNFG_10 */
-#define MAX77705_CHG_WCIN_LIM GENMASK(5, 0)
-
-/* MAX77705_CHG_REG_CNFG_11 */
-#define MAX77705_VBYPSET_SHIFT 0
-#define MAX77705_VBYPSET_MASK GENMASK(6, 0)
/* MAX77705_CHG_REG_CNFG_12 */
-#define MAX77705_CHGINSEL_SHIFT 5
-#define MAX77705_CHGINSEL_MASK BIT(MAX77705_CHGINSEL_SHIFT)
-#define MAX77705_WCINSEL_SHIFT 6
-#define MAX77705_WCINSEL_MASK BIT(MAX77705_WCINSEL_SHIFT)
-#define MAX77705_VCHGIN_REG_MASK GENMASK(4, 3)
-#define MAX77705_WCIN_REG_MASK GENMASK(2, 1)
-#define MAX77705_REG_DISKIP_SHIFT 0
-#define MAX77705_REG_DISKIP_MASK BIT(MAX77705_REG_DISKIP_SHIFT)
/* REG=4.5V, UVLO=4.7V */
#define MAX77705_VCHGIN_4_5 0
/* REG=4.5V, UVLO=4.7V */
@@ -183,9 +140,59 @@
#define MAX77705_CURRENT_CHGIN_MIN 100000
#define MAX77705_CURRENT_CHGIN_MAX 3200000
+enum max77705_field_idx {
+ MAX77705_CHGPROT,
+ MAX77705_CHG_EN,
+ MAX77705_CHG_CC_LIM,
+ MAX77705_CHG_CHGIN_LIM,
+ MAX77705_CHG_CV_PRM,
+ MAX77705_CHG_PQEN,
+ MAX77705_CHG_RSTRT,
+ MAX77705_CHG_WCIN,
+ MAX77705_FCHGTIME,
+ MAX77705_LX_SLOPE,
+ MAX77705_MODE,
+ MAX77705_OTG_ILIM,
+ MAX77705_REG_B2SOVRC,
+ MAX77705_REG_DISKIP,
+ MAX77705_REG_FSW,
+ MAX77705_SYS_TRACK,
+ MAX77705_TO,
+ MAX77705_TO_TIME,
+ MAX77705_VBYPSET,
+ MAX77705_VCHGIN,
+ MAX77705_WCIN,
+ MAX77705_N_REGMAP_FIELDS,
+};
+
+static const struct reg_field max77705_reg_field[MAX77705_N_REGMAP_FIELDS] = {
+ [MAX77705_MODE] = REG_FIELD(MAX77705_CHG_REG_CNFG_00, 0, 3),
+ [MAX77705_FCHGTIME] = REG_FIELD(MAX77705_CHG_REG_CNFG_01, 0, 2),
+ [MAX77705_CHG_RSTRT] = REG_FIELD(MAX77705_CHG_REG_CNFG_01, 4, 5),
+ [MAX77705_CHG_PQEN] = REG_FIELD(MAX77705_CHG_REG_CNFG_01, 7, 7),
+ [MAX77705_CHG_CC_LIM] = REG_FIELD(MAX77705_CHG_REG_CNFG_02, 0, 5),
+ [MAX77705_OTG_ILIM] = REG_FIELD(MAX77705_CHG_REG_CNFG_02, 6, 7),
+ [MAX77705_TO] = REG_FIELD(MAX77705_CHG_REG_CNFG_03, 0, 2),
+ [MAX77705_TO_TIME] = REG_FIELD(MAX77705_CHG_REG_CNFG_03, 3, 5),
+ [MAX77705_SYS_TRACK] = REG_FIELD(MAX77705_CHG_REG_CNFG_03, 7, 7),
+ [MAX77705_CHG_CV_PRM] = REG_FIELD(MAX77705_CHG_REG_CNFG_04, 0, 5),
+ [MAX77705_REG_B2SOVRC] = REG_FIELD(MAX77705_CHG_REG_CNFG_05, 0, 3),
+ [MAX77705_CHGPROT] = REG_FIELD(MAX77705_CHG_REG_CNFG_06, 2, 3),
+ [MAX77705_LX_SLOPE] = REG_FIELD(MAX77705_CHG_REG_CNFG_06, 5, 6),
+ [MAX77705_REG_FSW] = REG_FIELD(MAX77705_CHG_REG_CNFG_08, 0, 1),
+ [MAX77705_CHG_CHGIN_LIM] = REG_FIELD(MAX77705_CHG_REG_CNFG_09, 0, 6),
+ [MAX77705_CHG_EN] = REG_FIELD(MAX77705_CHG_REG_CNFG_09, 7, 7),
+ [MAX77705_CHG_WCIN] = REG_FIELD(MAX77705_CHG_REG_CNFG_10, 0, 5),
+ [MAX77705_VBYPSET] = REG_FIELD(MAX77705_CHG_REG_CNFG_11, 0, 6),
+ [MAX77705_REG_DISKIP] = REG_FIELD(MAX77705_CHG_REG_CNFG_12, 0, 0),
+ [MAX77705_WCIN] = REG_FIELD(MAX77705_CHG_REG_CNFG_12, 1, 2),
+ [MAX77705_VCHGIN] = REG_FIELD(MAX77705_CHG_REG_CNFG_12, 3, 4),
+};
+
struct max77705_charger_data {
struct device *dev;
struct regmap *regmap;
+ struct regmap_field *rfield[MAX77705_N_REGMAP_FIELDS];
struct power_supply_battery_info *bat_info;
struct workqueue_struct *wqueue;
struct work_struct chgin_work;
--
2.39.5
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