AHCI provides the register PORTS_IMPL to let the software know which port
is supported. The register must be initialized by the bootloader. However
in some cases u-boot doesn't properly initialize this value (if it is not
compiled with SATA support for example or if the SATA initialization fails).
The DTS entry "ports-implemented" can be used to override the value in
PORTS_IMPL.
Adding this entry in the dts allows us no to worry about what is done by
the bootloader.
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@xxxxxx>
Acked-by: Roger Quadros <rogerq@xxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> # v4.6+
---
arch/arm/boot/dts/dra7.dtsi | 1 +
arch/arm/boot/dts/omap5.dtsi | 1 +
2 files changed, 2 insertions(+)
diff --git a/arch/arm/boot/dts/dra7.dtsi b/arch/arm/boot/dts/dra7.dtsi
index 1faf24a..5ba1616 100644
--- a/arch/arm/boot/dts/dra7.dtsi
+++ b/arch/arm/boot/dts/dra7.dtsi
@@ -1378,6 +1378,7 @@
phy-names = "sata-phy";
clocks = <&sata_ref_clk>;
ti,hwmods = "sata";
+ ports-implemented = <0x1>;
};
rtc: rtc@48838000 {
diff --git a/arch/arm/boot/dts/omap5.dtsi b/arch/arm/boot/dts/omap5.dtsi
index 7cd92ba..0844737 100644
--- a/arch/arm/boot/dts/omap5.dtsi
+++ b/arch/arm/boot/dts/omap5.dtsi
@@ -988,6 +988,7 @@
phy-names = "sata-phy";
clocks = <&sata_ref_clk>;
ti,hwmods = "sata";
+ ports-implemented = <0x1>;
};
dss: dss@58000000 {
--
1.9.1
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