commit 0539d16d22f65b5958800489701249f990531073
author Christoph Fritz <chf.fritz@googlemail.com> Tue Apr 05 12:29:30 2022 +0200
committer Stefano Babic <sbabic@denx.de> Mon May 23 11:37:58 2022 +0200
tree 5fd79af0aabbd343357e2d4cc78ffa8a33f71a3c
parent 9d371e5fea39002c077db3335395ffc62e84e5fa

gpio: rgpio2p: Enhance reading of GPIO pin value

Add support for reading GPIO pin value when function is output.
With this patch applied, gpio toggle command is working.

Signed-off-by: Christoph Fritz <chf.fritz@googlemail.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Fabio Estevam <festevam@denx.de>

drivers/gpio/imx_rgpio2p.c

diff --git a/drivers/gpio/imx_rgpio2p.c b/drivers/gpio/imx_rgpio2p.c
index 0e2874c..175e460 100644
--- a/drivers/gpio/imx_rgpio2p.c
+++ b/drivers/gpio/imx_rgpio2p.c
@@ -39,6 +39,14 @@
 	return val & (1 << offset) ? 1 : 0;
 }
 
+static int imx_rgpio2p_bank_get_direction(struct gpio_regs *regs, int offset)
+{
+	if ((readl(&regs->gpio_pddr) >> offset) & 0x01)
+		return IMX_RGPIO2P_DIRECTION_OUT;
+
+	return IMX_RGPIO2P_DIRECTION_IN;
+}
+
 static void imx_rgpio2p_bank_direction(struct gpio_regs *regs, int offset,
 				    enum imx_rgpio2p_direction direction)
 {
@@ -67,7 +75,11 @@
 
 static int imx_rgpio2p_bank_get_value(struct gpio_regs *regs, int offset)
 {
-	return (readl(&regs->gpio_pdir) >> offset) & 0x01;
+	if (imx_rgpio2p_bank_get_direction(regs, offset) ==
+	    IMX_RGPIO2P_DIRECTION_IN)
+		return (readl(&regs->gpio_pdir) >> offset) & 0x01;
+
+	return (readl(&regs->gpio_pdor) >> offset) & 0x01;
 }
 
 static int  imx_rgpio2p_direction_input(struct udevice *dev, unsigned offset)