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dt-bindings: ata: add ahci_imx electrical properties

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Add the documentation for the electrical properties for the iMX SATA
controller.  There are many values for these, and listing them would
be error prone.  Refer readers to the device documentation and driver
source code for these details.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Reviewed-by: Shawn Guo <shawn.guo@freescale.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Russell King 2014-06-24 11:19:42 +01:00 committed by Tejun Heo
parent 29e6941366
commit dcb1b29b08
1 changed files with 8 additions and 0 deletions
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8
Documentation/devicetree/bindings/ata/imx-sata.txt
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@ -13,6 +13,14 @@ Required properties:
required entry in clock-names
- clock-names : should include "sata", "sata_ref" and "ahb" entries
Optional properties:
- fsl,transmit-level-mV : transmit voltage level, in millivolts.
- fsl,transmit-boost-mdB : transmit boost level, in milli-decibels
- fsl,transmit-atten-16ths : transmit attenuation, in 16ths
- fsl,receive-eq-mdB : receive equalisation, in milli-decibels
Please refer to the technical documentation or the driver source code
for the list of legal values for these options.
Examples:
sata@02200000 {