[PATCH] RTC: Add a comment for ENOIOCTLCMD in ds1553_rtc_ioctl

[firefly-linux-kernel-4.4.55.git] / drivers / rtc / rtc-ds1553.c

diff --git a/drivers/rtc/rtc-ds1553.c b/drivers/rtc/rtc-ds1553.c
index ecafbad41a242ce894d9247c88c6e1a5d0e67734..762521a1419cf296f080e7e4672e430f3029decc 100644 (file)
--- a/drivers/rtc/rtc-ds1553.c
+++ b/drivers/rtc/rtc-ds1553.c
@@ -226,7 +226,7 @@ static int ds1553_rtc_ioctl(struct device *dev, unsigned int cmd,
        struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
 
        if (pdata->irq < 0)
-               return -ENOIOCTLCMD;
+               return -ENOIOCTLCMD; /* fall back into rtc-dev's emulation */
        switch (cmd) {
        case RTC_AIE_OFF:
                pdata->irqen &= ~RTC_AF;