diff options
Diffstat (limited to 'drivers/rtc')
| -rw-r--r-- | drivers/rtc/rtc-sun6i.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/rtc/rtc-sun6i.c b/drivers/rtc/rtc-sun6i.c index 72086f0c0782..b0d45d23a11b 100644 --- a/drivers/rtc/rtc-sun6i.c +++ b/drivers/rtc/rtc-sun6i.c @@ -37,9 +37,11 @@ /* Control register */ #define SUN6I_LOSC_CTRL 0x0000 +#define SUN6I_LOSC_CTRL_KEY (0x16aa << 16) #define SUN6I_LOSC_CTRL_ALM_DHMS_ACC BIT(9) #define SUN6I_LOSC_CTRL_RTC_HMS_ACC BIT(8) #define SUN6I_LOSC_CTRL_RTC_YMD_ACC BIT(7) +#define SUN6I_LOSC_CTRL_EXT_OSC BIT(0) #define SUN6I_LOSC_CTRL_ACC_MASK GENMASK(9, 7) /* RTC */ @@ -417,6 +419,10 @@ static int sun6i_rtc_probe(struct platform_device *pdev) /* disable alarm wakeup */ writel(0, chip->base + SUN6I_ALARM_CONFIG); + /* switch to the external, more precise, oscillator */ + writel(SUN6I_LOSC_CTRL_KEY | SUN6I_LOSC_CTRL_EXT_OSC, + chip->base + SUN6I_LOSC_CTRL); + chip->rtc = rtc_device_register("rtc-sun6i", &pdev->dev, &sun6i_rtc_ops, THIS_MODULE); if (IS_ERR(chip->rtc)) { |