[PATCH v2 2/3] drivers: gpio: keep output value for input on sandbox

[Heinrich Schuchardt]

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 at gmx.de>
---
v2:
	new patch
---
 drivers/gpio/sandbox.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/gpio/sandbox.c b/drivers/gpio/sandbox.c
index c2f80472b8..eb2600de31 100644
--- 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;
 }
--
2.28.0