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power: supply: max77705_charger: implement aicl feature 

Adaptive input current allows charger to reduce it's current
consumption, when source is not able to provide enough power.

Signed-off-by: Dzmitry Sankouski <dsankouski@gmail.com>
Link: https://patch.msgid.link/20250925-max77705_77976_charger_improvement-v6-1-972c716c17d1@gmail.com
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
pull/1354/merge
Dzmitry Sankouski 2025-09-25 22:09:56 +03:00 committed by Sebastian Reichel
parent b838cecc22
commit 8ed6b8842c
2 changed files with 44 additions and 0 deletions
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42
drivers/power/supply/max77705_charger.c
View File

@ -40,6 +40,39 @@ static enum power_supply_property max77705_charger_props[] = {
POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
};
static irqreturn_t max77705_aicl_irq(int irq, void *irq_drv_data)
{
struct max77705_charger_data *chg = irq_drv_data;
unsigned int regval, irq_status;
int err;
err = regmap_read(chg->regmap, MAX77705_CHG_REG_INT_OK, &irq_status);
if (err < 0)
return IRQ_HANDLED;
// irq is fiered at the end of current decrease sequence too
// early check AICL_I bit to guard against that excess irq call
while (!(irq_status & BIT(MAX77705_AICL_I))) {
err = regmap_field_read(chg->rfield[MAX77705_CHG_CHGIN_LIM], &regval);
if (err < 0)
return IRQ_HANDLED;
regval--;
err = regmap_field_write(chg->rfield[MAX77705_CHG_CHGIN_LIM], regval);
if (err < 0)
return IRQ_HANDLED;
msleep(AICL_WORK_DELAY_MS);
err = regmap_read(chg->regmap, MAX77705_CHG_REG_INT_OK, &irq_status);
if (err < 0)
return IRQ_HANDLED;
}
return IRQ_HANDLED;
}
static irqreturn_t max77705_chgin_irq(int irq, void *irq_drv_data)
{
struct max77705_charger_data *chg = irq_drv_data;
@ -632,6 +665,15 @@ static int max77705_charger_probe(struct i2c_client *i2c)
goto destroy_wq;
}
ret = devm_request_threaded_irq(dev, regmap_irq_get_virq(irq_data, MAX77705_AICL_I),
NULL, max77705_aicl_irq,
IRQF_TRIGGER_NONE,
"aicl-irq", chg);
if (ret) {
dev_err_probe(dev, ret, "Failed to Request aicl IRQ\n");
goto destroy_wq;
}
ret = max77705_charger_enable(chg);
if (ret) {
dev_err_probe(dev, ret, "failed to enable charge\n");

2
include/linux/power/max77705_charger.h
View File

@ -123,6 +123,8 @@
#define MAX77705_DISABLE_SKIP 1
#define MAX77705_AUTO_SKIP 0
#define AICL_WORK_DELAY_MS 100
/* uA */
#define MAX77705_CURRENT_CHGIN_STEP 25000
#define MAX77705_CURRENT_CHG_STEP 50000