From: Heinrich Schuchardt <xypron.glpk@gmx.de>
Date: Mon, 14 Sep 2020 10:50:55 +0000 (+0200)
Subject: drivers: gpio: keep output value for input on sandbox
X-Git-Url: http://git.dujemihanovic.xyz/img/static/git-favicon.png?a=commitdiff_plain;h=7cd96a47281145aca4f9c8960a0a2e185b8bd70c;p=u-boot.git

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 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;
 }