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extcon: axp288: Redo charger type detection a couple of seconds after probe() 

The axp288 extcon code depends on other drivers to do things like mux the
data lines, enable/disable vbus based on the id-pin, etc.

Sometimes the BIOS has not set these things up correctly resulting in the
initial charger cable type detection giving a wrong result and we end up
not charging or charging at only 0.5A.

This commit starts a second charger-detection cycle a couple of seconds
after the first one finishes, giving the other drivers time to load and
do their thing.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
This commit is contained in:
Hans de Goede 2017-12-22 13:36:15 +01:00 committed by Chanwoo Choi
parent d61b814ab9
commit 60ed999614
1 changed files with 30 additions and 2 deletions
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32
drivers/extcon/extcon-axp288.c
View File

@ -1,6 +1,7 @@
/*
* extcon-axp288.c - X-Power AXP288 PMIC extcon cable detection driver
*
* Copyright (C) 2016-2017 Hans de Goede <hdegoede@redhat.com>
* Copyright (C) 2015 Intel Corporation
* Author: Ramakrishna Pallala <ramakrishna.pallala@intel.com>
*
@ -97,9 +98,11 @@ struct axp288_extcon_info {
struct device *dev;
struct regmap *regmap;
struct regmap_irq_chip_data *regmap_irqc;
struct delayed_work det_work;
int irq[EXTCON_IRQ_END];
struct extcon_dev *edev;
unsigned int previous_cable;
bool first_detect_done;
};
/* Power up/down reason string array */
@ -137,6 +140,25 @@ static void axp288_extcon_log_rsi(struct axp288_extcon_info *info)
regmap_write(info->regmap, AXP288_PS_BOOT_REASON_REG, clear_mask);
}
static void axp288_chrg_detect_complete(struct axp288_extcon_info *info)
{
/*
* We depend on other drivers to do things like mux the data lines,
* enable/disable vbus based on the id-pin, etc. Sometimes the BIOS has
* not set these things up correctly resulting in the initial charger
* cable type detection giving a wrong result and we end up not charging
* or charging at only 0.5A.
*
* So we schedule a second cable type detection after 2 seconds to
* give the other drivers time to load and do their thing.
*/
if (!info->first_detect_done) {
queue_delayed_work(system_wq, &info->det_work,
msecs_to_jiffies(2000));
info->first_detect_done = true;
}
}
static int axp288_handle_chrg_det_event(struct axp288_extcon_info *info)
{
int ret, stat, cfg, pwr_stat;
@ -201,6 +223,8 @@ no_vbus:
info->previous_cable = cable;
}
axp288_chrg_detect_complete(info);
return 0;
dev_det_ret:
@ -222,8 +246,11 @@ static irqreturn_t axp288_extcon_isr(int irq, void *data)
return IRQ_HANDLED;
}
static void axp288_extcon_enable(struct axp288_extcon_info *info)
static void axp288_extcon_det_work(struct work_struct *work)
{
struct axp288_extcon_info *info =
container_of(work, struct axp288_extcon_info, det_work.work);
regmap_update_bits(info->regmap, AXP288_BC_GLOBAL_REG,
BC_GLOBAL_RUN, 0);
/* Enable the charger detection logic */
@ -245,6 +272,7 @@ static int axp288_extcon_probe(struct platform_device *pdev)
info->regmap = axp20x->regmap;
info->regmap_irqc = axp20x->regmap_irqc;
info->previous_cable = EXTCON_NONE;
INIT_DELAYED_WORK(&info->det_work, axp288_extcon_det_work);
platform_set_drvdata(pdev, info);
@ -290,7 +318,7 @@ static int axp288_extcon_probe(struct platform_device *pdev)
}
/* Start charger cable type detection */
axp288_extcon_enable(info);
queue_delayed_work(system_wq, &info->det_work, 0);
return 0;
}