[PATCH] rtc: s3c: Document in binding that only s3c6410 needs a src clk

[Javier Martinez Canillas]

Commit 43f3408261a2 ("rtc: s3c: Document required clocks in the DT
binding") added to the S3C binding doc the required clocks needed
by the Real Time Clock but the S3C driver supports different HW IP
and only the s3c6410 needs a source clock.

Fix the DT binding explaning that the second clock is only needed
by this IP block and not for the others.

Reported-by: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx>
Fixes: 43f3408261a2 ("rtc: s3c: Document required clocks in the DT binding")
Signed-off-by: Javier Martinez Canillas <javier@xxxxxxxxxxxxxxx>

---
Hello,

The mentioned commit was picked by Rob Herring so this one has to go
through his tree again and not through the RTC tree to avoid conflicts.

Best regards,
Javier

 Documentation/devicetree/bindings/rtc/s3c-rtc.txt | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/rtc/s3c-rtc.txt b/Documentation/devicetree/bindings/rtc/s3c-rtc.txt
index 1068ffce9f91..fdde63a5419c 100644
--- a/Documentation/devicetree/bindings/rtc/s3c-rtc.txt
+++ b/Documentation/devicetree/bindings/rtc/s3c-rtc.txt
@@ -15,9 +15,10 @@ Required properties:
   is the rtc tick interrupt. The number of cells representing a interrupt
   depends on the parent interrupt controller.
 - clocks: Must contain a list of phandle and clock specifier for the rtc
-          and source clocks.
-- clock-names: Must contain "rtc" and "rtc_src" entries sorted in the
-               same order as the clocks property.
+          clock and in the case of a s3c6410 compatible controller, also
+          a source clock.
+- clock-names: Must contain "rtc" and for a s3c6410 compatible controller,
+               a "rtc_src" sorted in the same order as the clocks property.
 
 Example:
 
-- 
2.5.0