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power: BQ256xxx: Add support for debug board detection

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Disable charging when a debug board is detected.
Debug board is reported based on a GPIO state, add support
to sample this GPIO and disable charging by setting
the VINDP to 5.4V.

Change-Id: I8b8a0a833b4f50e24e0223cf9f2510c7e4ec8056
Signed-off-by: Ashish Chavan <quic_ashichav@quicinc.com>
Signed-off-by: Rakesh Kota <quic_kotarake@quicinc.com>
Signed-off-by: Monish Chunara <quic_mchunara@quicinc.com>
This commit is contained in:
Ashish Chavan 2022-04-21 16:48:43 +05:30 • committed by Monish Siraj Chunara
parent 99c95c2c53
commit c8ae80ba33
1 changed files with 34 additions and 0 deletions
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34
drivers/power/supply/bq256xx_charger.c
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@ -18,6 +18,8 @@
#include <linux/slab.h>
#include <linux/acpi.h>
#include <linux/extcon-provider.h>
#include <linux/gpio/consumer.h>
#include <linux/of_gpio.h>
#define BQ256XX_MANUFACTURER "Texas Instruments"
@ -145,6 +147,8 @@
#define BQ256XX_REG_RST BIT(7)
#define BQ256XX_MAX_INPUT_VOLTAGE_UV 5400000
/**
* struct bq256xx_init_data -
* @ichg: fast charge current
@ -261,6 +265,8 @@ struct bq256xx_device {
bool irq_waiting;
bool resume_completed;
/* debug_board_gpio to deteect the debug board*/
int debug_board_gpio;
};
/**
@ -1544,6 +1550,30 @@ static int bq256xx_power_supply_init(struct bq256xx_device *bq,
return 0;
}
static int bq256xx_debug_board_detect(struct bq256xx_device *bq)
{
int ret = 0;
if (!of_find_property(bq->dev->of_node, "debugboard-detect-gpio", NULL))
return ret;
bq->debug_board_gpio = of_get_named_gpio(bq->dev->of_node,
"debugboard-detect-gpio", 0);
if (IS_ERR(&bq->debug_board_gpio)) {
ret = PTR_ERR(&bq->debug_board_gpio);
dev_err(bq->dev, "Failed to initialize debugboard_detecte gpio\n");
return ret;
}
gpio_direction_input(bq->debug_board_gpio);
if (gpio_get_value(bq->debug_board_gpio)) {
bq->init_data.vindpm = BQ256XX_MAX_INPUT_VOLTAGE_UV;
dev_info(bq->dev,
"debug_board detected, setting vindpm to %d\n", bq->init_data.vindpm);
}
return ret;
}
static int bq256xx_hw_init(struct bq256xx_device *bq)
{
struct power_supply_battery_info *bat_info;
@ -1599,6 +1629,10 @@ static int bq256xx_hw_init(struct bq256xx_device *bq)
bat_info->constant_charge_voltage_max_uv;
}
ret = bq256xx_debug_board_detect(bq);
if (ret)
return ret;
ret = bq->chip_info->bq256xx_set_vindpm(bq, bq->init_data.vindpm);
if (ret)
return ret;