summaryrefslogtreecommitdiffstats
path: root/Documentation/devicetree/bindings/mmc
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/devicetree/bindings/mmc')
-rw-r--r--Documentation/devicetree/bindings/mmc/mmc.txt1
-rw-r--r--Documentation/devicetree/bindings/mmc/rockchip-dw-mshc.txt23
-rw-r--r--Documentation/devicetree/bindings/mmc/synopsis-dw-mshc.txt20
3 files changed, 44 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/mmc/mmc.txt b/Documentation/devicetree/bindings/mmc/mmc.txt
index 85aada2263d5..458b57f199af 100644
--- a/Documentation/devicetree/bindings/mmc/mmc.txt
+++ b/Documentation/devicetree/bindings/mmc/mmc.txt
@@ -28,6 +28,7 @@ Optional properties:
- cap-mmc-highspeed: MMC high-speed timing is supported
- cap-power-off-card: powering off the card is safe
- cap-sdio-irq: enable SDIO IRQ signalling on this interface
+- full-pwr-cycle: full power cycle of the card is supported
*NOTE* on CD and WP polarity. To use common for all SD/MMC host controllers line
polarity properties, we have to fix the meaning of the "normal" and "inverted"
diff --git a/Documentation/devicetree/bindings/mmc/rockchip-dw-mshc.txt b/Documentation/devicetree/bindings/mmc/rockchip-dw-mshc.txt
new file mode 100644
index 000000000000..8a3d91d47b6a
--- /dev/null
+++ b/Documentation/devicetree/bindings/mmc/rockchip-dw-mshc.txt
@@ -0,0 +1,23 @@
+* Rockchip specific extensions to the Synopsis Designware Mobile
+ Storage Host Controller
+
+The Synopsis designware mobile storage host controller is used to interface
+a SoC with storage medium such as eMMC or SD/MMC cards. This file documents
+differences between the core Synopsis dw mshc controller properties described
+by synopsis-dw-mshc.txt and the properties used by the Rockchip specific
+extensions to the Synopsis Designware Mobile Storage Host Controller.
+
+Required Properties:
+
+* compatible: should be
+ - "rockchip,rk2928-dw-mshc": for Rockchip RK2928 and following
+
+Example:
+
+ rkdwmmc0@12200000 {
+ compatible = "rockchip,rk2928-dw-mshc";
+ reg = <0x12200000 0x1000>;
+ interrupts = <0 75 0>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ };
diff --git a/Documentation/devicetree/bindings/mmc/synopsis-dw-mshc.txt b/Documentation/devicetree/bindings/mmc/synopsis-dw-mshc.txt
index 1180d7814af8..cdcebea9c6f5 100644
--- a/Documentation/devicetree/bindings/mmc/synopsis-dw-mshc.txt
+++ b/Documentation/devicetree/bindings/mmc/synopsis-dw-mshc.txt
@@ -39,6 +39,19 @@ Required Properties:
Optional properties:
+* clocks: from common clock binding: handle to biu and ciu clocks for the
+ bus interface unit clock and the card interface unit clock.
+
+* clock-names: from common clock binding: Shall be "biu" and "ciu".
+ If the biu clock is missing we'll simply skip enabling it. If the
+ ciu clock is missing we'll just assume that the clock is running at
+ clock-frequency. It is an error to omit both the ciu clock and the
+ clock-frequency.
+
+* clock-frequency: should be the frequency (in Hz) of the ciu clock. If this
+ is specified and the ciu clock is specified then we'll try to set the ciu
+ clock to this at probe time.
+
* num-slots: specifies the number of slots supported by the controller.
The number of physical slots actually used could be equal or less than the
value specified by num-slots. If this property is not specified, the value
@@ -55,6 +68,9 @@ Optional properties:
* broken-cd: as documented in mmc core bindings.
+* vmmc-supply: The phandle to the regulator to use for vmmc. If this is
+ specified we'll defer probe until we can find this regulator.
+
Aliases:
- All the MSHC controller nodes should be represented in the aliases node using
@@ -67,6 +83,8 @@ board specific portions as listed below.
dwmmc0@12200000 {
compatible = "snps,dw-mshc";
+ clocks = <&clock 351>, <&clock 132>;
+ clock-names = "biu", "ciu";
reg = <0x12200000 0x1000>;
interrupts = <0 75 0>;
#address-cells = <1>;
@@ -74,11 +92,13 @@ board specific portions as listed below.
};
dwmmc0@12200000 {
+ clock-frequency = <400000000>;
num-slots = <1>;
supports-highspeed;
broken-cd;
fifo-depth = <0x80>;
card-detect-delay = <200>;
+ vmmc-supply = <&buck8>;
slot@0 {
reg = <0>;