Allow to specify reset pins via DT

Some people may want to define all pins in the device tree. This patch
allows to specify the reset pin via the device tree.

NOTE: For sdio the reset pin must be pulled low ~200ms before probe is called.
Or be called ~500ms after probe is called.

Signed-off-by: Jesse Taube <[email protected]>

diff --git a/esp_hosted_ng/host/main.c b/esp_hosted_ng/host/main.c
index d0ed8eda7399bd71891388693d8a192dfef1c8a0..977f6cb6ef4a4d29458cb8a4fb2e68eadc1fa154 100644 (file)
--- a/esp_hosted_ng/host/main.c
+++ b/esp_hosted_ng/host/main.c
@@ -993,12 +993,32 @@ static void esp_reset(void)
        }
 }
 
+void dt_get_reset_pin(void)
+{
+       struct device_node *resetpin_node = NULL;
+       int temp_resetpin = HOST_GPIO_PIN_INVALID;
+
+
+       resetpin_node = of_find_compatible_node(NULL, NULL, "espressif,esp_sdio");
+       if (!resetpin_node)
+               resetpin_node = of_find_compatible_node(NULL, NULL, "espressif,esp_spi");
+       if (resetpin_node){
+               of_property_read_u32(resetpin_node, "resetpin", &temp_resetpin);
+               if (temp_resetpin == HOST_GPIO_PIN_INVALID)
+                       esp_warn("Unable to find resetpin in device tree.\n");
+               else
+                       resetpin = temp_resetpin;
+       }
+}
+
 static int __init esp_init(void)
 {
        int ret = 0;
        struct esp_adapter *adapter = NULL;
        struct esp_if_params if_params;
 
+       dt_get_reset_pin();
+
        /* Reset ESP, Clean start ESP */
        esp_reset();
        msleep(200);