| Message ID | 1443600937-11071-1-git-send-email-wens@csie.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi, On Wed, Sep 30, 2015 at 04:15:37PM +0800, Chen-Yu Tsai wrote: > The hummingbird A31 has 2 rtc devices available: one in the SoC, and > a pcf8563 external rtc on i2c2. > > For some unknown reason, the onboard backup battery to power the > internal rtc when power is removed, and its time would reset. Hence > we want to use the external one by default. The patch looks fine, but I'm not sure to understand the first sentence of that paragraph :/ Maxime
On Thu, Oct 1, 2015 at 6:11 PM, Maxime Ripard <maxime.ripard@free-electrons.com> wrote: > Hi, > > On Wed, Sep 30, 2015 at 04:15:37PM +0800, Chen-Yu Tsai wrote: >> The hummingbird A31 has 2 rtc devices available: one in the SoC, and >> a pcf8563 external rtc on i2c2. >> >> For some unknown reason, the onboard backup battery to power the >> internal rtc when power is removed, and its time would reset. Hence >> we want to use the external one by default. > > The patch looks fine, but I'm not sure to understand the first > sentence of that paragraph :/ Neither do I :/ I'll send another version. ChenYu
diff --git a/arch/arm/boot/dts/sun6i-a31-hummingbird.dts b/arch/arm/boot/dts/sun6i-a31-hummingbird.dts index 06d9391ca30e..358781113582 100644 --- a/arch/arm/boot/dts/sun6i-a31-hummingbird.dts +++ b/arch/arm/boot/dts/sun6i-a31-hummingbird.dts @@ -55,6 +55,8 @@ aliases { serial0 = &uart0; + rtc0 = &pcf8563; + rtc1 = &rtc; }; chosen {
The hummingbird A31 has 2 rtc devices available: one in the SoC, and a pcf8563 external rtc on i2c2. For some unknown reason, the onboard backup battery to power the internal rtc when power is removed, and its time would reset. Hence we want to use the external one by default. Add aliases for the rtc devices with the external one as rtc0. Signed-off-by: Chen-Yu Tsai <wens@csie.org> --- Can someone else with the Hummingbird A31 also test the internal RTC and see if it doesn't survive power removal? Thanks ChenYu --- arch/arm/boot/dts/sun6i-a31-hummingbird.dts | 2 ++ 1 file changed, 2 insertions(+)