Commit 8ed6b884 authored by Dzmitry Sankouski's avatar Dzmitry Sankouski Committed by Sebastian Reichel
Browse files

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: default avatarDzmitry Sankouski <dsankouski@gmail.com>
Link: https://patch.msgid.link/20250925-max77705_77976_charger_improvement-v6-1-972c716c17d1@gmail.com


Signed-off-by: default avatarSebastian Reichel <sebastian.reichel@collabora.com>
parent b838cecc

drivers/power/supply/max77705_charger.c

+42 −0
Original line number Diff line number Diff line
@@ -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");

include/linux/power/max77705_charger.h

+2 −0
Original line number Diff line number Diff line
@@ -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