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ata: add platform driver for Calxeda AHCI controller

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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>
This commit is contained in:
Mark Langsdorf
2012-09-06 16:03:30 -05:00
committed by Jeff Garzik
parent 100f586bd0
commit 8996b89d6b
7 changed files with 501 additions and 1 deletions
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17
arch/arm/boot/dts/highbank.dts
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@@ -121,6 +121,9 @@
compatible = "calxeda,hb-ahci";
reg = <0xffe08000 0x10000>;
interrupts = <0 83 4>;
calxeda,port-phys = <&combophy5 0 &combophy0 0
&combophy0 1 &combophy0 2
&combophy0 3>;
};
sdhci@ffe0e000 {
@@ -306,5 +309,19 @@
reg = <0xfff51000 0x1000>;
interrupts = <0 80 4 0 81 4 0 82 4>;
};
combophy0: combo-phy@fff58000 {
compatible = "calxeda,hb-combophy";
#phy-cells = <1>;
reg = <0xfff58000 0x1000>;
phydev = <5>;
};
combophy5: combo-phy@fff5d000 {
compatible = "calxeda,hb-combophy";
#phy-cells = <1>;
reg = <0xfff5d000 0x1000>;
phydev = <31>;
};
};
};