ARM: mx3: complement uart init routine with an exit routine

moboard_uart0_init requests a gpio.   Without an exit function that
frees that gpio again binding the uart a second time doesn't work.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

1 files changed, 15 insertions, 3 deletions

diff --git a/arch/arm/mach-mx3/mach-mx31moboard.c b/arch/arm/mach-mx3/mach-mx31moboard.c
index 95633bb063bf..67776bc61c33 100644
--- a/arch/arm/mach-mx3/mach-mx31moboard.c
+++ b/arch/arm/mach-mx3/mach-mx31moboard.c
@@ -125,13 +125,25 @@ static struct platform_device mx31moboard_flash = {
 
 static int moboard_uart0_init(struct platform_device *pdev)
 {
-        gpio_request(IOMUX_TO_GPIO(MX31_PIN_CTS1), "uart0-cts-hack");
-        gpio_direction_output(IOMUX_TO_GPIO(MX31_PIN_CTS1), 0);
-        return 0;
+        int ret = gpio_request(IOMUX_TO_GPIO(MX31_PIN_CTS1), "uart0-cts-hack");
+        if (ret)
+                return ret;
+
+        ret = gpio_direction_output(IOMUX_TO_GPIO(MX31_PIN_CTS1), 0);
+        if (ret)
+                gpio_free(IOMUX_TO_GPIO(MX31_PIN_CTS1));
+
+        return ret;
+}
+
+static void moboard_uart0_exit(struct platform_device *pdev)
+{
+        gpio_free(IOMUX_TO_GPIO(MX31_PIN_CTS1));
 }
 
 static const struct imxuart_platform_data uart0_pdata __initconst = {
         .init = moboard_uart0_init,
+        .exit = moboard_uart0_exit,
 };
 
 static const struct imxuart_platform_data uart4_pdata __initconst = {