GPIO descriptor fixes (#578)

Drivers/ssd1306-module/bindings/solomon,ssd1306.yaml

@@ -23,10 +23,6 @@ properties:
     type: phandles
     default: GPIO_PIN_SPEC_NONE
     description: Reset GPIO pin
-  reset-active-high:
-    type: boolean
-    default: false
-    description: Whether the reset pin is active high
   power-on-delay-ms:
     type: int
     default: 0

Drivers/ssd1306-module/include/drivers/ssd1306.h

@@ -22,7 +22,6 @@ struct Ssd1306Config {
 
     // Reset pin. GPIO_PIN_SPEC_NONE skips the reset toggle entirely.
     struct GpioPinSpec pin_reset;
-    bool reset_active_high;
 
     // See the 'power-on-delay-ms' binding property.
     uint32_t power_on_delay_ms;

Drivers/ssd1306-module/source/ssd1306.cpp

@@ -119,9 +119,10 @@ static void perform_hardware_reset(const Ssd1306Config* config) {
     };
     gpio_config(&io_conf);
 
-    gpio_set_level(pin, config->reset_active_high ? 1 : 0);
+    // SSD1306's reset line is fixed active-low in hardware.
+    gpio_set_level(pin, 0);
     vTaskDelay(pdMS_TO_TICKS(10));
-    gpio_set_level(pin, config->reset_active_high ? 0 : 1);
+    gpio_set_level(pin, 1);
     vTaskDelay(pdMS_TO_TICKS(100));
 }