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authorChaotian Jing <chaotian.jing@mediatek.com>2017-10-16 09:46:28 +0800
committerUlf Hansson <ulf.hansson@linaro.org>2017-10-30 12:01:37 +0100
commitd91ca84edeb04fad89faf0f723029b692f6b13b4 (patch)
tree1a4613ccc243484382d25a7dab4eeb37de60c73e /Documentation
parent361eeda0ca1674e54ba66ac4435865ebbed702e0 (diff)
downloadlinux-d91ca84edeb04fad89faf0f723029b692f6b13b4.tar.bz2
mmc: dt-bindings: Add reg/source_cg/latch-ck for Mediatek MMC bindings
Change the comptiable for support of multi-platform Make compatible explicit, as MMC host of mt8173 has difference with mt8135(mt8173 supports hs400 and hs400_tune),so that need separate mt8173/mt8135 compatible name. Add description for reg Add description for source_cg Add description for mediatek,latch-ck Note that source_cg and mediatek,latch-ck are optional for some projects, eg, MT2701 do not have source_cg, and MT2712 do not need mediatek,latch-ck Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com> Acked-by: Rob Herring <robh@kernel.org> Tested-by: Sean Wang <sean.wang@mediatek.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/devicetree/bindings/mmc/mtk-sd.txt18
1 files changed, 15 insertions, 3 deletions
diff --git a/Documentation/devicetree/bindings/mmc/mtk-sd.txt b/Documentation/devicetree/bindings/mmc/mtk-sd.txt
index 4182ea36ca5b..72d2a734ab85 100644
--- a/Documentation/devicetree/bindings/mmc/mtk-sd.txt
+++ b/Documentation/devicetree/bindings/mmc/mtk-sd.txt
@@ -7,10 +7,18 @@ This file documents differences between the core properties in mmc.txt
and the properties used by the msdc driver.
Required properties:
-- compatible: Should be "mediatek,mt8173-mmc","mediatek,mt8135-mmc"
+- compatible: value should be either of the following.
+ "mediatek,mt8135-mmc": for mmc host ip compatible with mt8135
+ "mediatek,mt8173-mmc": for mmc host ip compatible with mt8173
+ "mediatek,mt2701-mmc": for mmc host ip compatible with mt2701
+ "mediatek,mt2712-mmc": for mmc host ip compatible with mt2712
+- reg: physical base address of the controller and length
- interrupts: Should contain MSDC interrupt number
-- clocks: MSDC source clock, HCLK
-- clock-names: "source", "hclk"
+- clocks: Should contain phandle for the clock feeding the MMC controller
+- clock-names: Should contain the following:
+ "source" - source clock (required)
+ "hclk" - HCLK which used for host (required)
+ "source_cg" - independent source clock gate (required for MT2712)
- pinctrl-names: should be "default", "state_uhs"
- pinctrl-0: should contain default/high speed pin ctrl
- pinctrl-1: should contain uhs mode pin ctrl
@@ -30,6 +38,10 @@ Optional properties:
- mediatek,hs400-cmd-resp-sel-rising: HS400 command response sample selection
If present,HS400 command responses are sampled on rising edges.
If not present,HS400 command responses are sampled on falling edges.
+- mediatek,latch-ck: Some SoCs do not support enhance_rx, need set correct latch-ck to avoid data crc
+ error caused by stop clock(fifo full)
+ Valid range = [0:0x7]. if not present, default value is 0.
+ applied to compatible "mediatek,mt2701-mmc".
Examples:
mmc0: mmc@11230000 {