gpio: add support of new GPIO direction flag

[oweals/u-boot.git] / drivers / gpio / gpio-uclass.c

diff --git a/drivers/gpio/gpio-uclass.c b/drivers/gpio/gpio-uclass.c
index 9550e45e6cdd244d92386ab9ab4ec7fac0928bea..25263994d24033c4b42461193a06f8472096b4a8 100644 (file)
--- a/drivers/gpio/gpio-uclass.c
+++ b/drivers/gpio/gpio-uclass.c
@@ -145,6 +145,24 @@ int gpio_xlate_offs_flags(struct udevice *dev, struct gpio_desc *desc,
        if (args->args[1] & GPIO_ACTIVE_LOW)
                desc->flags |= GPIOD_ACTIVE_LOW;
 
+       /*
+        * need to test 2 bits for gpio output binding:
+        * OPEN_DRAIN (0x6) = SINGLE_ENDED (0x2) | LINE_OPEN_DRAIN (0x4)
+        * OPEN_SOURCE (0x2) = SINGLE_ENDED (0x2) | LINE_OPEN_SOURCE (0x0)
+        */
+       if (args->args[1] & GPIO_SINGLE_ENDED) {
+               if (args->args[1] & GPIO_LINE_OPEN_DRAIN)
+                       desc->flags |= GPIOD_OPEN_DRAIN;
+               else
+                       desc->flags |= GPIOD_OPEN_SOURCE;
+       }
+
+       if (args->args[1] & GPIO_PULL_UP)
+               desc->flags |= GPIOD_PULL_UP;
+
+       if (args->args[1] & GPIO_PULL_DOWN)
+               desc->flags |= GPIOD_PULL_DOWN;
+
        return 0;
 }
 
@@ -521,6 +539,18 @@ static int check_dir_flags(ulong flags)
                return -EINVAL;
        }
 
+       if ((flags & GPIOD_PULL_UP) && (flags & GPIOD_PULL_DOWN)) {
+               log_debug("%s: flags 0x%lx has GPIOD_PULL_UP and GPIOD_PULL_DOWN\n",
+                         __func__, flags);
+               return -EINVAL;
+       }
+
+       if ((flags & GPIOD_OPEN_DRAIN) && (flags & GPIOD_OPEN_SOURCE)) {
+               log_debug("%s: flags 0x%lx has GPIOD_OPEN_DRAIN and GPIOD_OPEN_SOURCE\n",
+                         __func__, flags);
+               return -EINVAL;
+       }
+
        return 0;
 }