* [PATCH 1/2] dt-bindings: power: supply: gpio-charger: add support for fast-charge timer
2025-10-22 19:47 [PATCH 0/2] power: supply: gpio-charger: add support for fast-charge timer Dimitri Fedrau via B4 Relay
@ 2025-10-22 19:47 ` Dimitri Fedrau via B4 Relay
2025-10-23 18:32 ` Conor Dooley
2025-10-22 19:47 ` [PATCH 2/2] " Dimitri Fedrau via B4 Relay
2025-11-11 10:11 ` [PATCH 0/2] " Dimitri Fedrau
2 siblings, 1 reply; 5+ messages in thread
From: Dimitri Fedrau via B4 Relay @ 2025-10-22 19:47 UTC (permalink / raw)
To: Sebastian Reichel, Rob Herring, Krzysztof Kozlowski, Conor Dooley
Cc: linux-pm, devicetree, linux-kernel, Dimitri Fedrau,
Dimitri Fedrau
From: Dimitri Fedrau <dimitri.fedrau@liebherr.com>
On some devices like TIs BQ24081 battery charger it is possible to activate
or deactivate a fast-charge timer that provides a backup safety for charge
termination via GPIO. In case of the BQ24081 it is a fixed 7-hour timer.
Signed-off-by: Dimitri Fedrau <dimitri.fedrau@liebherr.com>
---
Documentation/devicetree/bindings/power/supply/gpio-charger.yaml | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/Documentation/devicetree/bindings/power/supply/gpio-charger.yaml b/Documentation/devicetree/bindings/power/supply/gpio-charger.yaml
index 25826bfc289c1c00c338fd0cee2ae6932529cfc3..0edacc104186497118d4ba41f80947009a9aacf6 100644
--- a/Documentation/devicetree/bindings/power/supply/gpio-charger.yaml
+++ b/Documentation/devicetree/bindings/power/supply/gpio-charger.yaml
@@ -62,6 +62,10 @@ properties:
description: Default charge current limit. Must be listed in
charge-current-limit-mapping.
+ fast-charge-timer-gpios:
+ maxItems: 1
+ description: GPIO used for enabling/disabling the fast-charge timer
+
required:
- compatible
@@ -97,4 +101,5 @@ examples:
<700000 0x01>, // 700 mA => GPIO A.12 high
<0 0x02>; // 0 mA => GPIO A.11 high
charge-current-limit-default-microamp = <700000>;
+ fast-charge-timer-gpios = <&gpioA 13 GPIO_ACTIVE_LOW>;
};
--
2.39.5
^ permalink raw reply related [flat|nested] 5+ messages in thread* [PATCH 2/2] power: supply: gpio-charger: add support for fast-charge timer
2025-10-22 19:47 [PATCH 0/2] power: supply: gpio-charger: add support for fast-charge timer Dimitri Fedrau via B4 Relay
2025-10-22 19:47 ` [PATCH 1/2] dt-bindings: " Dimitri Fedrau via B4 Relay
@ 2025-10-22 19:47 ` Dimitri Fedrau via B4 Relay
2025-11-11 10:11 ` [PATCH 0/2] " Dimitri Fedrau
2 siblings, 0 replies; 5+ messages in thread
From: Dimitri Fedrau via B4 Relay @ 2025-10-22 19:47 UTC (permalink / raw)
To: Sebastian Reichel, Rob Herring, Krzysztof Kozlowski, Conor Dooley
Cc: linux-pm, devicetree, linux-kernel, Dimitri Fedrau,
Dimitri Fedrau
From: Dimitri Fedrau <dimitri.fedrau@liebherr.com>
On some devices like TIs BQ24081 battery charger it is possible to activate
or deactivate a fast-charge timer that provides a backup safety for charge
termination. In case of the BQ24081 it is a fixed 7-hour timer. Add support
for enabling/disabling the fast-charge timer via GPIO.
Signed-off-by: Dimitri Fedrau <dimitri.fedrau@liebherr.com>
---
.../ABI/testing/sysfs-class-power-gpio-charger | 10 ++++++
drivers/power/supply/gpio-charger.c | 39 ++++++++++++++++++++++
2 files changed, 49 insertions(+)
diff --git a/Documentation/ABI/testing/sysfs-class-power-gpio-charger b/Documentation/ABI/testing/sysfs-class-power-gpio-charger
new file mode 100644
index 0000000000000000000000000000000000000000..95fb31ac4af3d5354bdc642c98baa7df267d150d
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-class-power-gpio-charger
@@ -0,0 +1,10 @@
+What: /sys/class/power_supply/<supply_name>/fast_charge_timer
+Date: October 2025
+KernelVersion: 6.19.0
+Contact: Dimitri Fedrau <dimitri.fedrau@liebherr.com>
+Description:
+ This entry enables or disables the timer in fast-charge mode.
+
+ Access: Write
+
+ Valid values: 0 (disabled) or 1 (enabled)
diff --git a/drivers/power/supply/gpio-charger.c b/drivers/power/supply/gpio-charger.c
index 2504190eba82e69b79382320e67de6b8f3dedc77..52997205879406fae600171b070a0328657fa79b 100644
--- a/drivers/power/supply/gpio-charger.c
+++ b/drivers/power/supply/gpio-charger.c
@@ -32,6 +32,7 @@ struct gpio_charger {
struct power_supply_desc charger_desc;
struct gpio_desc *gpiod;
struct gpio_desc *charge_status;
+ struct gpio_desc *timer;
struct gpio_descs *current_limit_gpios;
struct gpio_mapping *current_limit_map;
@@ -259,6 +260,36 @@ static int init_charge_current_limit(struct device *dev,
return 0;
}
+static ssize_t fast_charge_timer_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct power_supply *psy = dev_get_drvdata(dev);
+ struct gpio_charger *gpio_charger = power_supply_get_drvdata(psy);
+ int ret;
+ bool en;
+
+ if (kstrtobool(buf, &en))
+ return -EINVAL;
+
+ if (!gpio_charger->timer)
+ return -ENODEV;
+
+ ret = gpiod_set_value_cansleep(gpio_charger->timer, en);
+ if (ret)
+ return ret;
+
+ return count;
+}
+
+static DEVICE_ATTR_WO(fast_charge_timer);
+
+static struct attribute *gpio_charger_attrs[] = {
+ &dev_attr_fast_charge_timer.attr,
+ NULL
+};
+ATTRIBUTE_GROUPS(gpio_charger);
+
/*
* The entries will be overwritten by driver's probe routine depending
* on the available features. This list ensures, that the array is big
@@ -308,6 +339,13 @@ static int gpio_charger_probe(struct platform_device *pdev)
num_props++;
}
+ gpio_charger->timer = devm_gpiod_get_optional(dev, "fast-charge-timer",
+ GPIOD_OUT_HIGH);
+ if (IS_ERR(gpio_charger->timer)) {
+ return dev_err_probe(dev, PTR_ERR(gpio_charger->timer),
+ "error getting fast-charge timer GPIO descriptor\n");
+ }
+
charge_status = devm_gpiod_get_optional(dev, "charge-status", GPIOD_IN);
if (IS_ERR(charge_status))
return PTR_ERR(charge_status);
@@ -336,6 +374,7 @@ static int gpio_charger_probe(struct platform_device *pdev)
psy_cfg.fwnode = dev_fwnode(dev);
psy_cfg.drv_data = gpio_charger;
+ psy_cfg.attr_grp = gpio_charger_groups;
if (pdata) {
charger_desc->name = pdata->name;
--
2.39.5
^ permalink raw reply related [flat|nested] 5+ messages in thread* Re: [PATCH 0/2] power: supply: gpio-charger: add support for fast-charge timer
2025-10-22 19:47 [PATCH 0/2] power: supply: gpio-charger: add support for fast-charge timer Dimitri Fedrau via B4 Relay
2025-10-22 19:47 ` [PATCH 1/2] dt-bindings: " Dimitri Fedrau via B4 Relay
2025-10-22 19:47 ` [PATCH 2/2] " Dimitri Fedrau via B4 Relay
@ 2025-11-11 10:11 ` Dimitri Fedrau
2 siblings, 0 replies; 5+ messages in thread
From: Dimitri Fedrau @ 2025-11-11 10:11 UTC (permalink / raw)
To: dimitri.fedrau
Cc: Sebastian Reichel, Rob Herring, Krzysztof Kozlowski, Conor Dooley,
linux-pm, devicetree, linux-kernel
Hi Sebastian,
gentle ping, is there a chance for you reviewing the series ?
Best regards,
Dimitri Fedrau
Am Wed, Oct 22, 2025 at 09:47:46PM +0200 schrieb Dimitri Fedrau via B4 Relay:
> On some devices like TIs BQ24081 battery charger it is possible to activate
> or deactivate a fast-charge timer that provides a backup safety for charge
> termination. In case of the BQ24081 it is a fixed 7-hour timer. Add support
> for enabling/disabling the fast-charge timer via GPIO.
>
> Signed-off-by: Dimitri Fedrau <dimitri.fedrau@liebherr.com>
> ---
> Dimitri Fedrau (2):
> dt-bindings: power: supply: gpio-charger: add support for fast-charge timer
> power: supply: gpio-charger: add support for fast-charge timer
>
> .../ABI/testing/sysfs-class-power-gpio-charger | 10 ++++++
> .../bindings/power/supply/gpio-charger.yaml | 5 +++
> drivers/power/supply/gpio-charger.c | 39 ++++++++++++++++++++++
> 3 files changed, 54 insertions(+)
> ---
> base-commit: 3a8660878839faadb4f1a6dd72c3179c1df56787
> change-id: 20251022-gpio-charger-timer-cddae1619714
>
> Best regards,
> --
> Dimitri Fedrau <dimitri.fedrau@liebherr.com>
>
>
^ permalink raw reply [flat|nested] 5+ messages in thread