drivers: gpio: keep output value for input on sandbox

For testing purposes keep the output value when switching to input.
This allows us to manipulate the input value via the gpio command.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Philippe Reynes <philippe.reynes@softathome.com>

diff --git a/drivers/gpio/sandbox.c b/drivers/gpio/sandbox.c
index c2f80472b83a8a900f813e2f66db51bfba3e23a5..eb2600de3111d8cea5f882ff5a3580fe257c4d96 100644 (file)
--- a/drivers/gpio/sandbox.c
+++ b/drivers/gpio/sandbox.c
@@ -185,7 +185,15 @@ static int sb_gpio_set_dir_flags(struct udevice *dev, unsigned int offset,
 
        dir_flags = get_gpio_dir_flags(dev, offset);
 
-       *dir_flags = flags;
+       /*
+        * For testing purposes keep the output value when switching to input.
+        * This allows us to manipulate the input value via the gpio command.
+        */
+       if (flags & GPIOD_IS_IN)
+               *dir_flags = (flags & ~GPIOD_IS_OUT_ACTIVE) |
+                            (*dir_flags & GPIOD_IS_OUT_ACTIVE);
+       else
+               *dir_flags = flags;
 
        return 0;
 }