dt-bindings: rtc: add rx8571 compatible

The Epson rx8571 is compatible with the Epson rx8581 RTC.

The difference between the rx8571 and rx8581 RTC is that the former has
16 bytes more RAM. This renders them incompatible from a DT point of view.

Signed-off-by: Biju Das <biju.das@bp.renesas.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

diff --git a/Documentation/devicetree/bindings/rtc/rtc.txt b/Documentation/devicetree/bindings/rtc/rtc.txt
index fc79d71..f4687c6 100644 (file)
--- a/Documentation/devicetree/bindings/rtc/rtc.txt
+++ b/Documentation/devicetree/bindings/rtc/rtc.txt
@@ -48,6 +48,7 @@ dallas,ds1374         I2C, 32-Bit Binary Counter Watchdog RTC with Trickle Charger and
 dallas,ds1672          Dallas DS1672 Real-time Clock
 dallas,ds3232          Extremely Accurate I²C RTC with Integrated Crystal and SRAM
 epson,rx8010           I2C-BUS INTERFACE REAL TIME CLOCK MODULE
+epson,rx8571           I2C-BUS INTERFACE REAL TIME CLOCK MODULE with Battery Backed RAM
 epson,rx8581           I2C-BUS INTERFACE REAL TIME CLOCK MODULE
 emmicro,em3027         EM Microelectronic EM3027 Real-time Clock
 isil,isl1208           Intersil ISL1208 Low Power RTC with Battery Backed SRAM