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Improve gpio-hog driver

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This commit is contained in:
Ken Van Hoeylandt 2026-07-14 00:02:40 +02:00
parent 49af1d42f8
commit 1069032148
4 changed files with 35 additions and 10 deletions
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2
Devices/lilygo-thmi/lilygo,thmi.dts
View File

@ -41,11 +41,13 @@
power_on { power_on {
compatible = "tactility,gpio-hog"; compatible = "tactility,gpio-hog";
pin = <&gpio0 14 GPIO_FLAG_NONE>; pin = <&gpio0 14 GPIO_FLAG_NONE>;
mode = <GPIO_HOG_MODE_OUTPUT_HIGH>;
}; };
power_en { power_en {
compatible = "tactility,gpio-hog"; compatible = "tactility,gpio-hog";
pin = <&gpio0 10 GPIO_FLAG_NONE>; pin = <&gpio0 10 GPIO_FLAG_NONE>;
mode = <GPIO_HOG_MODE_OUTPUT_HIGH>;
}; };
adc0 { adc0 {

10
TactilityKernel/bindings/tactility,gpio-hog.yaml
View File

@ -13,7 +13,9 @@ properties:
type: phandles type: phandles
required: true required: true
description: The GPIO pin to hog description: The GPIO pin to hog
output-high: mode:
type: boolean type: int
default: true default: 0
description: Level to drive the pin to (true = high, false = low) description: |
Pin mode, see enum GpioHogMode in tactility/drivers/gpio_hog.h:
0 = GPIO_HOG_MODE_OUTPUT_HIGH, 1 = GPIO_HOG_MODE_OUTPUT_LOW, 2 = GPIO_HOG_MODE_INPUT.

10
TactilityKernel/include/tactility/drivers/gpio_hog.h
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@ -5,13 +5,17 @@
extern "C" { extern "C" {
#endif #endif
#include <stdbool.h>
#include <tactility/drivers/gpio.h> #include <tactility/drivers/gpio.h>
enum GpioHogMode {
GPIO_HOG_MODE_OUTPUT_HIGH,
GPIO_HOG_MODE_OUTPUT_LOW,
GPIO_HOG_MODE_INPUT,
};
struct GpioHogConfig { struct GpioHogConfig {
struct GpioPinSpec pin; struct GpioPinSpec pin;
bool output_high; enum GpioHogMode mode;
}; };
#ifdef __cplusplus #ifdef __cplusplus

23
TactilityKernel/source/drivers/gpio_hog.cpp
View File

@ -24,9 +24,26 @@ static error_t start(Device* device) {
return ERROR_RESOURCE; return ERROR_RESOURCE;
} }
if (gpio_descriptor_set_flags(descriptor, GPIO_FLAG_DIRECTION_OUTPUT) != ERROR_NONE || bool ok;
gpio_descriptor_set_level(descriptor, config->output_high) != ERROR_NONE) { switch (config->mode) {
LOG_E(TAG, "Failed to configure hogged pin"); case GPIO_HOG_MODE_OUTPUT_HIGH:
ok = gpio_descriptor_set_flags(descriptor, GPIO_FLAG_DIRECTION_OUTPUT) == ERROR_NONE &&
gpio_descriptor_set_level(descriptor, true) == ERROR_NONE;
break;
case GPIO_HOG_MODE_OUTPUT_LOW:
ok = gpio_descriptor_set_flags(descriptor, GPIO_FLAG_DIRECTION_OUTPUT) == ERROR_NONE &&
gpio_descriptor_set_level(descriptor, false) == ERROR_NONE;
break;
case GPIO_HOG_MODE_INPUT:
ok = gpio_descriptor_set_flags(descriptor, GPIO_FLAG_DIRECTION_INPUT) == ERROR_NONE;
break;
default:
ok = false;
break;
}
if (!ok) {
LOG_E(TAG, "Failed to configure hogged pin %u", config->pin.pin);
gpio_descriptor_release(descriptor); gpio_descriptor_release(descriptor);
return ERROR_RESOURCE; return ERROR_RESOURCE;
} }