Commit 04767b9f authored by Chris Brandt's avatar Chris Brandt Committed by Alexandre Belloni

dt-bindings: rtc: document the rtc-sh bindings

Add the binding documentation for rtc-sh which is an RTC for
SuperH and RZ/A SoCs.
Signed-off-by: default avatarChris Brandt <chris.brandt@renesas.com>
Acked-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarAlexandre Belloni <alexandre.belloni@free-electrons.com>
parent dab5aec6
* Real Time Clock for Renesas SH and ARM SoCs
Required properties:
- compatible: Should be "renesas,r7s72100-rtc" and "renesas,sh-rtc" as a
fallback.
- reg: physical base address and length of memory mapped region.
- interrupts: 3 interrupts for alarm, period, and carry.
- interrupt-names: The interrupts should be labeled as "alarm", "period", and
"carry".
- clocks: The functional clock source for the RTC controller must be listed
first (if exists). Additionally, potential clock counting sources are to be
listed.
- clock-names: The functional clock must be labeled as "fck". Other clocks
may be named in accordance to the SoC hardware manuals.
Example:
rtc: rtc@fcff1000 {
compatible = "renesas,r7s72100-rtc", "renesas,sh-rtc";
reg = <0xfcff1000 0x2e>;
interrupts = <GIC_SPI 276 IRQ_TYPE_EDGE_RISING
GIC_SPI 277 IRQ_TYPE_EDGE_RISING
GIC_SPI 278 IRQ_TYPE_EDGE_RISING>;
interrupt-names = "alarm", "period", "carry";
clocks = <&mstp6_clks R7S72100_CLK_RTC>, <&rtc_x1_clk>,
<&rtc_x3_clk>, <&extal_clk>;
clock-names = "fck", "rtc_x1", "rtc_x3", "extal";
};
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