65 lines
2.0 KiB
Diff
65 lines
2.0 KiB
Diff
From 483e6f724aa6731d6d0b5577ef0f644ff0b6c86f Mon Sep 17 00:00:00 2001
|
|
From: Ondrej Jirman <megi@xff.cz>
|
|
Date: Tue, 2 Aug 2022 09:37:05 +0200
|
|
Subject: [PATCH 315/391] power: supply: rk818-charger: Delay applying input
|
|
current limit until first BC detection finishes
|
|
|
|
When the phone boots for the first time, we only want to react to
|
|
changes in charger power supply max current after the USB power supply
|
|
type detection finishes. This allows us to keep the limit set by
|
|
the bootloader, until we know better.
|
|
|
|
This is part of the workaround for Pinephone Pro boot loops on low battery.
|
|
The other part is bootloader raising the input current limit to 2A.
|
|
|
|
Signed-off-by: Ondrej Jirman <megi@xff.cz>
|
|
---
|
|
drivers/power/supply/rk818_charger.c | 17 +++++++++++++++++
|
|
1 file changed, 17 insertions(+)
|
|
|
|
diff --git a/drivers/power/supply/rk818_charger.c b/drivers/power/supply/rk818_charger.c
|
|
index 16bc4686b..979165c98 100644
|
|
--- a/drivers/power/supply/rk818_charger.c
|
|
+++ b/drivers/power/supply/rk818_charger.c
|
|
@@ -51,6 +51,8 @@ struct rk818_charger {
|
|
|
|
struct power_supply *usb_psy;
|
|
struct power_supply *charger_psy;
|
|
+
|
|
+ bool apply_ilim;
|
|
};
|
|
|
|
// {{{ USB supply
|
|
@@ -72,6 +74,8 @@ static int rk818_usb_set_input_current_max(struct rk818_charger *cg,
|
|
else
|
|
reg = 11;
|
|
|
|
+ dev_info(cg->dev, "applying input current limit %d mA\n", val / 1000);
|
|
+
|
|
ret = regmap_update_bits(cg->regmap, RK818_USB_CTRL_REG,
|
|
RK818_USB_CTRL_USB_ILIM_MASK, reg);
|
|
if (ret)
|
|
@@ -242,6 +246,19 @@ static void rk818_usb_power_external_power_changed(struct power_supply *psy)
|
|
if (ret)
|
|
return;
|
|
|
|
+ /*
|
|
+ * We only want to start applying input current limit after we get first
|
|
+ * non-0 value from the supplier. Until then, we keep the limit applied
|
|
+ * by the bootloader. If we lower the limit before the charger is properly
|
|
+ * detected, we risk boot failure due to insufficient power.
|
|
+ */
|
|
+ if (!cg->apply_ilim) {
|
|
+ if (!val.intval)
|
|
+ return;
|
|
+
|
|
+ cg->apply_ilim = true;
|
|
+ }
|
|
+
|
|
if (val.intval < 500000)
|
|
val.intval = 500000;
|
|
|
|
--
|
|
2.35.3
|
|
|