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| author | Haibo Chen <haibo.chen@freescale.com> | 2015-02-27 18:35:30 +0800 |
|---|---|---|
| committer | Haibo Chen <haibo.chen@freescale.com> | 2015-03-04 11:19:02 +0800 |
| commit | fa663c7db49204dcfa91666278b210695629df13 (patch) | |
| tree | 50a15e55e2b417163920f9fa70da781184287df3 /Documentation | |
| parent | 7f3cb78205e06046647a12b73a4b6b619ce2ff78 (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 { |