diff options
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/imx.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index 2813f021037..92a5987924c 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -1302,6 +1302,10 @@ static int serial_imx_resume(struct platform_device *dev) } #ifdef CONFIG_OF +/* + * This function returns 1 iff pdev isn't a device instatiated by dt, 0 iff it + * could successfully get all information from dt or a negative errno. + */ static int serial_imx_probe_dt(struct imx_port *sport, struct platform_device *pdev) { @@ -1311,7 +1315,8 @@ static int serial_imx_probe_dt(struct imx_port *sport, int ret; if (!np) - return -ENODEV; + /* no device tree device */ + return 1; ret = of_alias_get_id(np, "serial"); if (ret < 0) { @@ -1334,7 +1339,7 @@ static int serial_imx_probe_dt(struct imx_port *sport, static inline int serial_imx_probe_dt(struct imx_port *sport, struct platform_device *pdev) { - return -ENODEV; + return 1; } #endif @@ -1369,8 +1374,10 @@ static int serial_imx_probe(struct platform_device *pdev) return -ENOMEM; ret = serial_imx_probe_dt(sport, pdev); - if (ret == -ENODEV) + if (ret > 0) serial_imx_probe_pdata(sport, pdev); + else if (ret < 0) + goto free; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) { |