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power: rk817-battery: Add low power support in suspend

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Some platforms (such as Eink) during suspend the current
is very low (low than 2Ma), if long time to sleep, it will
cause the dsoc to drain faster.

Signed-off-by: Shunqing Chen <csq@rock-chips.com>
Change-Id: I25330a3a79f9684487bea0f523d97d61b8098e8a
This commit is contained in:
Shunqing Chen
2021-01-25 01:29:17 +00:00
committed by Tao Huang
parent 29f57122a3
commit ff9607fe94
1 changed files with 18 additions and 2 deletions
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20
drivers/power/supply/rk817_battery.c
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@@ -140,6 +140,8 @@ module_param_named(dbg_level, dbg_enable, int, 0644);
/* sleep */
#define SLP_CURR_MAX 40
#define SLP_CURR_MIN 6
#define LOW_PWR_SLP_CURR_MAX 20
#define LOW_PWR_SLP_CURR_MIN 1
#define DISCHRG_TIME_STEP1 MINUTE(10)
#define DISCHRG_TIME_STEP2 MINUTE(60)
#define SLP_DSOC_VOL_THRESD 3600
@@ -476,6 +478,7 @@ struct battery_platform_data {
u32 bat_res_down;
u32 design_max_voltage;
bool extcon;
u32 low_pwr_sleep;
};
struct rk817_battery_device {
@@ -1887,6 +1890,10 @@ static int rk817_bat_parse_dt(struct rk817_battery_device *battery)
if (ret < 0)
dev_err(dev, "power_off_thresd missing!\n");
ret = of_property_read_u32(np, "low_power_sleep", &pdata->low_pwr_sleep);
if (ret < 0)
dev_info(dev, "low_power_sleep missing!\n");
if (battery->chip_id == RK809_ID) {
ret = of_property_read_u32(np, "bat_res_up",
&pdata->bat_res_up);
@@ -3237,6 +3244,7 @@ static int rk817_bat_sleep_dischrg(struct rk817_battery_device *battery)
int tgt_dsoc, gap_soc, sleep_soc = 0;
int pwroff_vol = battery->pdata->pwroff_vol;
unsigned long sleep_sec = battery->sleep_dischrg_sec;
int sleep_cur;
DBG("<%s>. enter: dsoc=%d, rsoc=%d, rv=%d, v=%d, sleep_min=%lu\n",
__func__, battery->dsoc, battery->rsoc, battery->voltage_relax,
@@ -3251,7 +3259,11 @@ static int rk817_bat_sleep_dischrg(struct rk817_battery_device *battery)
/* handle dsoc */
if (battery->dsoc <= battery->rsoc) {
battery->sleep_sum_cap = (SLP_CURR_MIN * sleep_sec / 3600);
if (battery->pdata->low_pwr_sleep)
sleep_cur = LOW_PWR_SLP_CURR_MIN;
else
sleep_cur = SLP_CURR_MIN;
battery->sleep_sum_cap = (sleep_cur * sleep_sec / 3600);
sleep_soc = battery->sleep_sum_cap * 100 / DIV(battery->fcc);
tgt_dsoc = battery->dsoc - sleep_soc * 1000;
if (sleep_soc > 0) {
@@ -3274,7 +3286,11 @@ static int rk817_bat_sleep_dischrg(struct rk817_battery_device *battery)
__func__, battery->sleep_sum_cap, sleep_soc, tgt_dsoc);
} else {
/* di->dsoc > di->rsoc */
battery->sleep_sum_cap = (SLP_CURR_MAX * sleep_sec / 3600);
if (battery->pdata->low_pwr_sleep)
sleep_cur = LOW_PWR_SLP_CURR_MAX;
else
sleep_cur = SLP_CURR_MAX;
battery->sleep_sum_cap = (sleep_cur * sleep_sec / 3600);
sleep_soc = battery->sleep_sum_cap / DIV(battery->fcc / 100);
gap_soc = battery->dsoc - battery->rsoc;