From b2e4c7b94e2826bea435aa3107e7c44f3e68515b Mon Sep 17 00:00:00 2001 From: Mark Langsdorf Date: Wed, 14 Aug 2013 13:23:31 -0500 Subject: sata, highbank: set tx_atten override bits Some board designs do not drive the SATA transmit lines within the specification. The ECME can provide override settings, on a per board basis, to bring the transmit lines within spec. Read those settings from the DTB and program them in. At the time of submission, no production hardware requires this patch. Signed-off-by: Mark Langsdorf Signed-off-by: Tejun Heo --- Documentation/devicetree/bindings/ata/sata_highbank.txt | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'Documentation/devicetree/bindings/ata') diff --git a/Documentation/devicetree/bindings/ata/sata_highbank.txt b/Documentation/devicetree/bindings/ata/sata_highbank.txt index e7a6f2864f8b..c84833e13363 100644 --- a/Documentation/devicetree/bindings/ata/sata_highbank.txt +++ b/Documentation/devicetree/bindings/ata/sata_highbank.txt @@ -20,6 +20,9 @@ Optional properties: indicator lights using the indicated GPIOs - calxeda,led-order : a u32 array that map port numbers to offsets within the SGPIO bitstream. +- calxeda,tx-atten : a u32 array that contains TX attenuation override + codes, one per port. The upper 3 bytes are always + 0 and thus ignored. Example: sata@ffe08000 { @@ -31,4 +34,5 @@ Example: &combophy0 2 &combophy0 3>; calxeda,sgpio-gpio =<&gpioh 5 1 &gpioh 6 1 &gpioh 7 1>; calxeda,led-order = <4 0 1 2 3>; + calxeda,tx-atten = <0xff 22 0xff 0xff 23>; }; -- cgit v1.2.3