Messages in this thread Patch in this message | | | From | Shawn Lin <> | Subject | [PATCH v2 1/6] dt-bindings: rockchip-dw-mshc: add description of rockchip,power-invert | Date | Sun, 7 Aug 2016 09:34:04 +0800 |
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rockchip,power-invert is used for rockchip to introduce the flag DW_MMC_CARD_PWR_INVERT from DT which should make the power control of dw_mmc more flexible according to different hw design.
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
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Changes in v2: None
Documentation/devicetree/bindings/mmc/rockchip-dw-mshc.txt | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/Documentation/devicetree/bindings/mmc/rockchip-dw-mshc.txt b/Documentation/devicetree/bindings/mmc/rockchip-dw-mshc.txt index 07184e8..5640659 100644 --- a/Documentation/devicetree/bindings/mmc/rockchip-dw-mshc.txt +++ b/Documentation/devicetree/bindings/mmc/rockchip-dw-mshc.txt @@ -30,6 +30,12 @@ Optional Properties: probing, low speeds or in case where all phases work at tuning time. If not specified 0 deg will be used. +* rockchip,power-invert: Invert the power control of PWREN register. If adding + it, the card should be in power-on state when the power io outputs high level + voltage, and it should be in power-off state when outputing low level voltage. + otherwise the behaviour of power control should be the opposite way which is + the default policy of dw mshc. + Example: rkdwmmc0@12200000 { -- 2.3.7
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