dt-bindings: mmc: sdhci-am654: Document bindings for the host controllers on TI's...

Add binding documentation for mmc host controllers present on TI's J721E
SOC. The 4 bit IP on J721E doesn't have a phy DLL so make DLL related
properties as optional for that compatible. Also add an optional
strobe-sel property used for HS400 speed mode.

Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

diff --git a/Documentation/devicetree/bindings/mmc/sdhci-am654.txt b/Documentation/devicetree/bindings/mmc/sdhci-am654.txt
index 15dbbbace27eb35be924af9c1657bbd374ffaf79..50e87df479718f0a2f4fac762301ff4cd7c3eb91 100644 (file)
--- a/Documentation/devicetree/bindings/mmc/sdhci-am654.txt
+++ b/Documentation/devicetree/bindings/mmc/sdhci-am654.txt
@@ -8,7 +8,10 @@ Only deviations are documented here.
   [3] Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
 
 Required Properties:
-       - compatible: should be "ti,am654-sdhci-5.1"
+       - compatible: should be one of:
+                       "ti,am654-sdhci-5.1": SDHCI on AM654 device.
+                       "ti,j721e-sdhci-8bit": 8 bit SDHCI on J721E device.
+                       "ti,j721e-sdhci-4bit": 4 bit SDHCI on J721E device.
        - reg: Must be two entries.
                - The first should be the sdhci register space
                - The second should the subsystem/phy register space
@@ -16,9 +19,13 @@ Required Properties:
        - clock-names: Tuple including "clk_xin" and "clk_ahb"
        - interrupts: Interrupt specifiers
        - ti,otap-del-sel: Output Tap Delay select
+
+Optional Properties (Required for ti,am654-sdhci-5.1 and ti,j721e-sdhci-8bit):
        - ti,trm-icp: DLL trim select
        - ti,driver-strength-ohm: driver strength in ohms.
                                  Valid values are 33, 40, 50, 66 and 100 ohms.
+Optional Properties:
+       - ti,strobe-sel: strobe select delay for HS400 speed mode. Default value: 0x0.
 
 Example: