[PATCH] serial: imx: Avoid probe failure in case of missing gpiolib
From: Schrempf Frieder <hidden>
Date: 2019-08-01 08:18:16
Also in:
linux-serial, lkml
Subsystem:
the rest, tty layer and serial drivers · Maintainers:
Linus Torvalds, Greg Kroah-Hartman, Jiri Slaby
From: Frieder Schrempf <redacted> If CONFIG_GPIOLIB is not enabled, mctrl_gpio_init() will return -ENOSYS and cause the probing of the imx UART to fail. As the GPIOs are optional, we should continue probing in this case. Signed-off-by: Frieder Schrempf <redacted> --- drivers/tty/serial/imx.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index 10db3e54ac9e..51714498dacf 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c@@ -2237,7 +2237,9 @@ static int imx_uart_probe(struct platform_device *pdev) timer_setup(&sport->timer, imx_uart_timeout, 0); sport->gpios = mctrl_gpio_init(&sport->port, 0); - if (IS_ERR(sport->gpios)) + if (PTR_ERR(sport->gpios) == -ENOSYS) + sport->gpios = NULL; + else if (IS_ERR(sport->gpios)) return PTR_ERR(sport->gpios); sport->clk_ipg = devm_clk_get(&pdev->dev, "ipg");
--
2.17.1
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