diff options
| author | Haibo Chen <haibo.chen@freescale.com> | 2015-02-27 18:35:30 +0800 |
|---|---|---|
| committer | Nitin Garg <nitin.garg@freescale.com> | 2015-04-14 14:02:36 -0500 |
| commit | 1c3dac9dbc851fff1fd1dd6719dc6a603cbfa979 (patch) | |
| tree | b5661b7260214db11219565216d23eb077af5f15 /Documentation | |
| parent | 9ae30872f4d08373e42616362174b1c0e298f360 (diff) | |
MLK-10237-4 mmc: sdhci-esdhc-imx: add tuning-step setting support
tuning-step is the delay cell steps in tuning procedure. This patch
add the tuning-step setting in driver, so that user can set the
tuning-step value in dts.
e.g.
tuning-step = <2>;
this example set the tuning-step as value 2.
This patch also set the tuning-step of i.MX7D as 2, so that the tuning
procedure can execute successfully.
Signed-off-by: Haibo Chen <haibo.chen@freescale.com>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt index 9046ba06c47a..aa470163902c 100644 --- a/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt +++ b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt @@ -17,6 +17,8 @@ Optional properties: to select a proper data sampling window in case the clock quality is not good due to signal path is too long on the board. Please refer to eSDHC/uSDHC chapter, DLL (Delay Line) section in RM for details. +- tuning-step : The delay cell steps in tuning procedure. + Some boards need to set the tuning-step to make sure it can pass tuning procedure. Examples: @@ -26,6 +28,7 @@ esdhc@70004000 { interrupts = <1>; fsl,cd-controller; fsl,wp-controller; + tuning-step = <2>; }; esdhc@70008000 { |