[U-Boot] [PATCH] rtc: pcf8563: Make century compatible with Linux

[Wolfgang Denk]

Dear Benoît Thébaudeau,

In message <2136837803.335794.1342793136811.JavaMail.root at advansee.com> you wrote:
> This driver uses the century bit of this RTC in the opposite way Linux does> .
> From Linux's rtc-pcf8563.c:
> 	/*
> 	 * The meaning of MO_C bit varies by the chip type.
> 	 * From PCF8563 datasheet: this bit is toggled when the years
> 	 * register overflows from 99 to 00
> 	 *   0 indicates the century is 20xx
> 	 *   1 indicates the century is 19xx
> 	 * From RTC8564 datasheet: this bit indicates change of
> 	 * century. When the year digit data overflows from 99 to 00,
> 	 * this bit is set. By presetting it to 0 while still in the
> 	 * 20th century, it will be set in year 2000, ...
> 	 * There seems no reliable way to know how the system use this
> 	 * bit.  So let's do it heuristically, assuming we are live in
> 	 * 1970...2069.
> 	 */
>
> As U-Boot's PCF8563 driver does not say it is supposed to support the RTC85> 64,
> make this driver compatible with Linux's by giving the opposite meaning to > the
> century bit.
>
> Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau at advansee.com>
> Cc: Wolfgang Denk <wd at denx.de>
> ---
>  .../drivers/rtc/pcf8563.c                          |    4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)

Applied, thanks.

Best regards,

Wolfgang Denk

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