[PATCH] Documentation: dt: rtc-imxdi: imx53-rtc is not compatible

[linux-kernel-dev]

From: Patrick Bruenn <p.bruenn@xxxxxxxxxxxx>

rtc-imxdi driver is not compatible with imx53-rtc like the example
suggested.
Only the raw timestamp register offsets match by accident, which has the
effect, that during startup/shutdown system clock syncronization with
rtc seems to work for imx53, too.
However hwclock and rtctest, will not work as expected on imx53.
To avoid future reverts like [1], we should adjust the documentation.

[1] http://lists.infradead.org/pipermail/linux-arm-kernel/2017-November/542312.html

Signed-off-by: Patrick Bruenn <p.bruenn@xxxxxxxxxxxx>

---

To: Alessandro Zummo <a.zummo@xxxxxxxxxxxx>
To: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxxxxxxxxx>
Cc: Rob Herring <robh+dt@xxxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx> (maintainer:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS)
Cc: linux-rtc@xxxxxxxxxxxxxxx (open list:REAL TIME CLOCK (RTC) SUBSYSTEM)
Cc: devicetree@xxxxxxxxxxxxxxx (open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS)
Cc: linux-kernel@xxxxxxxxxxxxxxx (open list)
Cc: Fabio Estevam <fabio.estevam@xxxxxxx>
Cc: Juergen Borleis <jbe@xxxxxxxxxxxxxx>
Cc: Noel Vellemans <Noel.Vellemans@xxxxxxxxxxxxx>
Cc: Shawn Guo <shawnguo@xxxxxxxxxx>
---
 Documentation/devicetree/bindings/rtc/imxdi-rtc.txt | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/rtc/imxdi-rtc.txt b/Documentation/devicetree/bindings/rtc/imxdi-rtc.txt
index 323cf26374cb..af853b0ceac5 100644
--- a/Documentation/devicetree/bindings/rtc/imxdi-rtc.txt
+++ b/Documentation/devicetree/bindings/rtc/imxdi-rtc.txt
@@ -1,6 +1,6 @@
 * i.MX25 Real Time Clock controller
 
-This binding supports the following chips: i.MX25, i.MX53
+This binding supports the following chips: i.MX25
 
 Required properties:
 - compatible: should be: "fsl,imx25-rtc"
@@ -14,7 +14,7 @@ Optional properties:
 Example:
 
 rtc@80056000 {
-	compatible = "fsl,imx53-rtc", "fsl,imx25-rtc";
+	compatible = "fsl,imx25-rtc";
 	reg = <0x80056000 2000>;
 	interrupts = <29 56>;
 };
-- 
2.11.0