openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

dt-bindings: mmc: sprd: Add pinctrl support 

When changing SD card voltage signal for Spreadtrum SD host controller,
it also need to switch related pin's state. Thus add pinctrl properties'
description in documentation.

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Baolin Wang 2019-06-21 14:12:32 +08:00 committed by Ulf Hansson
parent eef9e0a60e
commit f97ee8f5d9
1 changed files with 7 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
Documentation/devicetree/bindings/mmc/sdhci-sprd.txt
View File

@ -19,6 +19,9 @@ Required properties:
Optional properties:
- assigned-clocks: the same with "sdio" clock
- assigned-clock-parents: the default parent of "sdio" clock
- pinctrl-names: should be "default", "state_uhs"
- pinctrl-0: should contain default/high speed pin control
- pinctrl-1: should contain uhs mode pin control
PHY DLL delays are used to delay the data valid window, and align the window
to sampling clock. PHY DLL delays can be configured by following properties,
@ -50,6 +53,10 @@ sdio0: sdio@20600000 {
assigned-clocks = <&ap_clk CLK_EMMC_2X>;
assigned-clock-parents = <&rpll CLK_RPLL_390M>;
pinctrl-names = "default", "state_uhs";
pinctrl-0 = <&sd0_pins_default>;
pinctrl-1 = <&sd0_pins_uhs>;
sprd,phy-delay-sd-uhs-sdr104 = <0x3f 0x7f 0x2e 0x2e>;
bus-width = <8>;
non-removable;