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dt-bindings: ata: create bindings for imx sata controller

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To: Tejun Heo <tj@kernel.org>,linux-ide@vger.kernel.org

The Freescale i.MX SATA controller mostly conforms to the AHCI
interface, but there are some special extensions at integration level
like clocks settings and hardware parameters.

Let's create a separate bindings doc for imx sata controller, so that
more imx specific properties can be added later without messing up the
generic ahci-platform bindings.

Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Shawn Guo 2014-06-24 11:19:27 +01:00 committed by Tejun Heo
parent a1a6cc1d2e
commit 23a7c31e4a
2 changed files with 26 additions and 6 deletions
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6
Documentation/devicetree/bindings/ata/ahci-platform.txt
View file

@ -6,8 +6,6 @@ Each SATA controller should have its own node.
Required properties:
- compatible : compatible string, one of:
- "allwinner,sun4i-a10-ahci"
- "fsl,imx53-ahci"
- "fsl,imx6q-ahci"
- "hisilicon,hisi-ahci"
- "ibm,476gtr-ahci"
- "marvell,armada-380-ahci"
@ -22,10 +20,6 @@ Optional properties:
- clocks : a list of phandle + clock specifier pairs
- target-supply : regulator for SATA target power
"fsl,imx53-ahci", "fsl,imx6q-ahci" required properties:
- clocks : must contain the sata, sata_ref and ahb clocks
- clock-names : must contain "ahb" for the ahb clock
Examples:
sata@ffe08000 {
compatible = "snps,spear-ahci";

26
Documentation/devicetree/bindings/ata/imx-sata.txt Normal file
View file

@ -0,0 +1,26 @@
* Freescale i.MX AHCI SATA Controller
The Freescale i.MX SATA controller mostly conforms to the AHCI interface
with some special extensions at integration level.
Required properties:
- compatible : should be one of the following:
- "fsl,imx53-ahci" for i.MX53 SATA controller
- "fsl,imx6q-ahci" for i.MX6Q SATA controller
- interrupts : interrupt mapping for SATA IRQ
- reg : registers mapping
- clocks : list of clock specifiers, must contain an entry for each
required entry in clock-names
- clock-names : should include "sata", "sata_ref" and "ahb" entries
Examples:
sata@02200000 {
compatible = "fsl,imx6q-ahci";
reg = <0x02200000 0x4000>;
interrupts = <0 39 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&clks IMX6QDL_CLK_SATA>,
<&clks IMX6QDL_CLK_SATA_REF_100M>,
<&clks IMX6QDL_CLK_AHB>;
clock-names = "sata", "sata_ref", "ahb";
};