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# SPDX-License-Identifier: GPL-2.0
%YAML 1.2
---
$id: http://devicetree.org/schemas/mmc/mtk-sd.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: MTK MSDC Storage Host Controller Binding
maintainers:
- Chaotian Jing <chaotian.jing@mediatek.com>
- Wenbin Mei <wenbin.mei@mediatek.com>
allOf:
- $ref: mmc-controller.yaml#
properties:
compatible:
oneOf:
- enum:
- mediatek,mt2701-mmc
- mediatek,mt2712-mmc
- mediatek,mt6779-mmc
- mediatek,mt7620-mmc
- mediatek,mt7622-mmc
- mediatek,mt8135-mmc
- mediatek,mt8173-mmc
- mediatek,mt8183-mmc
- mediatek,mt8516-mmc
- items:
- const: mediatek,mt7623-mmc
- const: mediatek,mt2701-mmc
- items:
- const: mediatek,mt8192-mmc
- const: mediatek,mt8183-mmc
- items:
- const: mediatek,mt8195-mmc
- const: mediatek,mt8183-mmc
reg:
maxItems: 1
clocks:
description:
Should contain phandle for the clock feeding the MMC controller.
minItems: 2
items:
- description: source clock (required).
- description: HCLK which used for host (required).
- description: independent source clock gate (required for MT2712).
- description: bus clock used for internal register access (required for MT2712 MSDC0/3).
- description: msdc subsys clock gate (required for MT8192).
- description: peripheral bus clock gate (required for MT8192).
- description: AXI bus clock gate (required for MT8192).
- description: AHB bus clock gate (required for MT8192).
clock-names:
minItems: 2
items:
- const: source
- const: hclk
- const: source_cg
- const: bus_clk
- const: sys_cg
- const: pclk_cg
- const: axi_cg
- const: ahb_cg
interrupts:
maxItems: 1
pinctrl-names:
items:
- const: default
- const: state_uhs
pinctrl-0:
description:
should contain default/high speed pin ctrl.
maxItems: 1
pinctrl-1:
description:
should contain uhs mode pin ctrl.
maxItems: 1
assigned-clocks:
description:
PLL of the source clock.
maxItems: 1
assigned-clock-parents:
description:
parent of source clock, used for HS400 mode to get 400Mhz source clock.
maxItems: 1
hs400-ds-delay:
$ref: /schemas/types.yaml#/definitions/uint32
description:
HS400 DS delay setting.
minimum: 0
maximum: 0xffffffff
mediatek,hs200-cmd-int-delay:
$ref: /schemas/types.yaml#/definitions/uint32
description:
HS200 command internal delay setting.
This field has total 32 stages.
The value is an integer from 0 to 31.
minimum: 0
maximum: 31
mediatek,hs400-cmd-int-delay:
$ref: /schemas/types.yaml#/definitions/uint32
description:
HS400 command internal delay setting.
This field has total 32 stages.
The value is an integer from 0 to 31.
minimum: 0
maximum: 31
mediatek,hs400-cmd-resp-sel-rising:
$ref: /schemas/types.yaml#/definitions/flag
description:
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,hs400-ds-dly3:
$ref: /schemas/types.yaml#/definitions/uint32
description:
Gear of the third delay line for DS for input data latch in data
pad macro, there are 32 stages from 0 to 31.
For different corner IC, the time is different about one step, it is
about 100ps.
The value is confirmed by doing scan and calibration to find a best
value with corner IC and it is valid only for HS400 mode.
minimum: 0
maximum: 31
mediatek,latch-ck:
$ref: /schemas/types.yaml#/definitions/uint32
description:
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".
minimum: 0
maximum: 7
resets:
maxItems: 1
reset-names:
const: hrst
required:
- compatible
- reg
- interrupts
- clocks
- clock-names
- pinctrl-names
- pinctrl-0
- pinctrl-1
- vmmc-supply
- vqmmc-supply
unevaluatedProperties: false
examples:
- |
#include <dt-bindings/interrupt-controller/irq.h>
#include <dt-bindings/interrupt-controller/arm-gic.h>
#include <dt-bindings/clock/mt8173-clk.h>
mmc0: mmc@11230000 {
compatible = "mediatek,mt8173-mmc";
reg = <0x11230000 0x1000>;
interrupts = <GIC_SPI 39 IRQ_TYPE_LEVEL_LOW>;
vmmc-supply = <&mt6397_vemc_3v3_reg>;
vqmmc-supply = <&mt6397_vio18_reg>;
clocks = <&pericfg CLK_PERI_MSDC30_0>,
<&topckgen CLK_TOP_MSDC50_0_H_SEL>;
clock-names = "source", "hclk";
pinctrl-names = "default", "state_uhs";
pinctrl-0 = <&mmc0_pins_default>;
pinctrl-1 = <&mmc0_pins_uhs>;
assigned-clocks = <&topckgen CLK_TOP_MSDC50_0_SEL>;
assigned-clock-parents = <&topckgen CLK_TOP_MSDCPLL_D2>;
hs400-ds-delay = <0x14015>;
mediatek,hs200-cmd-int-delay = <26>;
mediatek,hs400-cmd-int-delay = <14>;
mediatek,hs400-cmd-resp-sel-rising;
};
...
|
