[v0.1,3/7] dt-bindings: mmc: add DT binding for UniPhier SD/eMMC controller
diff mbox series

Message ID 1533622642-13989-4-git-send-email-yamada.masahiro@socionext.com
State New, archived
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Series
  • mmc: tmio: refactor TMIO core a bit and add UniPhier SD/eMMC controller support
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Commit Message

Masahiro Yamada Aug. 7, 2018, 6:17 a.m. UTC
This SD/eMMC controller is used for UniPhier SoC family.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
---

 .../devicetree/bindings/mmc/uniphier-sd.txt        | 60 ++++++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mmc/uniphier-sd.txt

Comments

Rob Herring Aug. 14, 2018, 8:15 p.m. UTC | #1
On Tue,  7 Aug 2018 15:17:18 +0900, Masahiro Yamada <yamada.masahiro@socionext.com> wrote:
> This SD/eMMC controller is used for UniPhier SoC family.
> 
> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
> ---
> 
>  .../devicetree/bindings/mmc/uniphier-sd.txt        | 60 ++++++++++++++++++++++
>  1 file changed, 60 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/mmc/uniphier-sd.txt
> 

Reviewed-by: Rob Herring <robh@kernel.org>

Patch
diff mbox series

diff --git a/Documentation/devicetree/bindings/mmc/uniphier-sd.txt b/Documentation/devicetree/bindings/mmc/uniphier-sd.txt
new file mode 100644
index 0000000..49dd0fc
--- /dev/null
+++ b/Documentation/devicetree/bindings/mmc/uniphier-sd.txt
@@ -0,0 +1,60 @@ 
+UniPhier SD/eMMC controller
+
+Required properties:
+- compatible: should be one of the following:
+    "socionext,uniphier-sd-v2.91" - IP version 2.91
+    "socionext,uniphier-sd-v3.1"  - IP version 3.1
+    "socionext,uniphier-sd-v3.1b" - IP version 3.1 (bug-fix ver.) [1]
+- reg: offset and length of the register set for the device.
+- interrupts: a single interrupt specifier.
+- clocks: a single clock specifier of the controller clock.
+- reset-names: should contain the following:
+    "host"   - mandatory for all versions
+    "bridge" - should exist only for "socionext,uniphier-sd-v2.91"
+    "hw"     - should exist if eMMC hw reset line is available
+- resets: a list of reset specifiers, corresponding to the reset-names
+
+[1] There are two different controller cores for version 3.1.  The early
+    release had a bug in the DMA RX channel.  The issue was fixed later,
+    but the version number was not incremented.  Hence, the latter has
+    'b' at the end of its compatible string.
+
+Optional properties:
+- pinctrl-names: if present, should contain the following:
+    "default" - should exist for all instances
+    "uhs"     - should exist for SD instance with UHS support
+- pinctrl-0: pin control state for the default mode
+- pinctrl-1: pin control state for the UHS mode
+- dma-names: should be "rx-tx" if present.
+  This property can exist only for "socionext,uniphier-sd-v2.91".
+- dmas: a single DMA channel specifier
+  This property can exist only for "socionext,uniphier-sd-v2.91".
+- bus-width: see mmc.txt
+- cap-sd-highspeed: see mmc.txt
+- cap-mmc-highspeed: see mmc.txt
+- sd-uhs-sdr12: see mmc.txt
+- sd-uhs-sdr25: see mmc.txt
+- sd-uhs-sdr50: see mmc.txt
+- cap-mmc-hw-reset: should exist if reset-names contains "hw". see mmc.txt
+- non-removable: see mmc.txt
+
+Example:
+
+	sd: sdhc@5a400000 {
+		compatible = "socionext,uniphier-sd-v2.91";
+		reg = <0x5a400000 0x200>;
+		interrupts = <0 76 4>;
+		pinctrl-names = "default", "uhs";
+		pinctrl-0 = <&pinctrl_sd>;
+		pinctrl-1 = <&pinctrl_sd_uhs>;
+		clocks = <&mio_clk 0>;
+		reset-names = "host", "bridge";
+		resets = <&mio_rst 0>, <&mio_rst 3>;
+		dma-names = "rx-tx";
+		dmas = <&dmac 4>;
+		bus-width = <4>;
+		cap-sd-highspeed;
+		sd-uhs-sdr12;
+		sd-uhs-sdr25;
+		sd-uhs-sdr50;
+	};