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authorMark Langsdorf <mark.langsdorf@calxeda.com>2012-09-06 16:03:30 -0500
committerJeff Garzik <jgarzik@redhat.com>2012-09-13 01:09:41 -0400
commit8996b89d6bc98ae2f6d6e6e624a42a3f89d06949 (patch)
tree2084f726d4a4b4ecc4db807fadcb2c529b73f776 /Documentation/devicetree/bindings/arm/calxeda
parent100f586bd0959fe0e52b8a0b8cb49a3df1c6b044 (diff)
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ata: add platform driver for Calxeda AHCI controller
Calxeda highbank SATA phy has intermittent problems bringing up a link with Gen3 drives. Retrying the phy hard reset can work-around this issue, but each reset also disables spread spectrum support. The reset function also needs to reprogram the phy to enable spread spectrum support. Create a new driver based on ahci_platform to support the Calxeda Highbank SATA controller. Signed-off-by: Mark Langsdorf <mark.langsdorf@calxeda.com> Signed-off-by: Rob Herring <rob.herring@calxeda.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'Documentation/devicetree/bindings/arm/calxeda')
-rw-r--r--Documentation/devicetree/bindings/arm/calxeda/combophy.txt17
1 files changed, 17 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/arm/calxeda/combophy.txt b/Documentation/devicetree/bindings/arm/calxeda/combophy.txt
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+++ b/Documentation/devicetree/bindings/arm/calxeda/combophy.txt
@@ -0,0 +1,17 @@
+Calxeda Highbank Combination Phys for SATA
+
+Properties:
+- compatible : Should be "calxeda,hb-combophy"
+- #phy-cells: Should be 1.
+- reg : Address and size for Combination Phy registers.
+- phydev: device ID for programming the combophy.
+
+Example:
+
+ combophy5: combo-phy@fff5d000 {
+ compatible = "calxeda,hb-combophy";
+ #phy-cells = <1>;
+ reg = <0xfff5d000 0x1000>;
+ phydev = <31>;
+ };
+
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