[PATCH 2/2] rtc: ds1307: Add support for configuring external clock pin
s.hauer at pengutronix.de
Sun May 29 22:14:39 PDT 2016
On Thu, May 19, 2016 at 11:39:32PM +0000, Trent Piepho wrote:
> The DS1307 has a square wave output pin, which can be used to output a
> clock signal from the DS1307. Additionally, the DS1308 supports
> configuring this pin as an input from an external clock source to
> which it should sync itself.
> Add support with OF device tree properties to configure these
> settings. Supported features are using the clock pin as an output, an
> input, the rate of the pin, and if it should be enabled on battery
> backup power.
> The driver does not check that the selected features are supported by
> the clock chip being used. It is the designer's responsibility to
> create a valid device tree node; the bootloader does not attempt to be
> a device tree validator.
> Signed-off-by: Trent Piepho <tpiepho at kymetacorp.com>
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