[RESEND PATCH] gpio: rgpio2p: Enhance reading of GPIO pin value

[Christoph Fritz]

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.fr...@googlemail.com>
Cc: Fabio Estevam <feste...@gmail.com>
Reviewed-by: Peng Fan <peng....@nxp.com>
---
 drivers/gpio/imx_rgpio2p.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/gpio/imx_rgpio2p.c b/drivers/gpio/imx_rgpio2p.c
index 0e2874ca95c..175e460aff5 100644
--- a/drivers/gpio/imx_rgpio2p.c
+++ b/drivers/gpio/imx_rgpio2p.c
@@ -39,6 +39,14 @@ static int imx_rgpio2p_is_output(struct gpio_regs *regs, int 
offset)
        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 void imx_rgpio2p_bank_set_value(struct gpio_regs 
*regs, int offset,
 
 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)
-- 
2.30.2