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-rw-r--r--dts/Bindings/mmc/tmio_mmc.txt13
1 files changed, 13 insertions, 0 deletions
diff --git a/dts/Bindings/mmc/tmio_mmc.txt b/dts/Bindings/mmc/tmio_mmc.txt
index a1650edfd2..4fd8b7acc5 100644
--- a/dts/Bindings/mmc/tmio_mmc.txt
+++ b/dts/Bindings/mmc/tmio_mmc.txt
@@ -25,6 +25,19 @@ Required properties:
"renesas,sdhi-r8a7795" - SDHI IP on R8A7795 SoC
"renesas,sdhi-r8a7796" - SDHI IP on R8A7796 SoC
+- clocks: Most controllers only have 1 clock source per channel. However, on
+ some variations of this controller, the internal card detection
+ logic that exists in this controller is sectioned off to be run by a
+ separate second clock source to allow the main core clock to be turned
+ off to save power.
+ If 2 clocks are specified by the hardware, you must name them as
+ "core" and "cd". If the controller only has 1 clock, naming is not
+ required.
+ Below is the number clocks for each supported SoC:
+ 1: SH73A0, R8A73A4, R8A7740, R8A7778, R8A7779, R8A7790
+ R8A7791, R8A7792, R8A7793, R8A7794, R8A7795, R8A7796
+ 2: R7S72100
+
Optional properties:
- toshiba,mmc-wrprotect-disable: write-protect detection is unavailable
- pinctrl-names: should be "default", "state_uhs"