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authorJean-Jacques Hiblot <jjhiblot@ti.com>2017-01-09 15:22:15 +0300
committerTony Lindgren <tony@atomide.com>2017-01-13 20:16:52 +0300
commit87cb12910a2ab6ed41ae951ea4d9c1cc1120199a (patch)
tree113fe050cb985ecbb4512b32fbc3e03414d9065d /arch/arm/boot/dts/omap5.dtsi
parent8e2329ead748a85f4ae103d71a0575ef364c30a0 (diff)
downloadlinux-87cb12910a2ab6ed41ae951ea4d9c1cc1120199a.tar.xz
ARM: dts: OMAP5 / DRA7: indicate that SATA port 0 is available.
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. Without this patch the SATA will not work in the following two cases: * if there has been a failure to initialize SATA in u-boot. * if ahci_platform module has been removed and re-inserted. The reason is that the content of PORTS_IMPL is lost after the module is removed. I suspect that it's because the controller is reset by the hwmod. Cc: <stable@vger.kernel.org> # v4.6+ Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com> Acked-by: Roger Quadros <rogerq@ti.com> [tony@atomide.com: updated comments with what goes wrong] Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'arch/arm/boot/dts/omap5.dtsi')
-rw-r--r--arch/arm/boot/dts/omap5.dtsi1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/omap5.dtsi b/arch/arm/boot/dts/omap5.dtsi
index 7cd92babc41a..0844737b72b2 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 {