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# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
%YAML 1.2
---
$id: http://devicetree.org/schemas/mmc/cdns,sdhci.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Cadence SD/SDIO/eMMC Host Controller (SD4HC)
maintainers:
- Masahiro Yamada <yamada.masahiro@socionext.com>
- Piotr Sroka <piotrs@cadence.com>
allOf:
- $ref: mmc-controller.yaml
properties:
compatible:
items:
- enum:
- socionext,uniphier-sd4hc
- const: cdns,sd4hc
reg:
maxItems: 1
interrupts:
maxItems: 1
clocks:
maxItems: 1
# PHY DLL input delays:
# They are used to delay the data valid window, and align the window to
# sampling clock. The delay starts from 5ns (for delay parameter equal to 0)
# and it is increased by 2.5ns in each step.
cdns,phy-input-delay-sd-highspeed:
description: Value of the delay in the input path for SD high-speed timing
allOf:
- $ref: "/schemas/types.yaml#/definitions/uint32"
- minimum: 0
- maximum: 0x1f
cdns,phy-input-delay-legacy:
description: Value of the delay in the input path for legacy timing
allOf:
- $ref: "/schemas/types.yaml#/definitions/uint32"
- minimum: 0
- maximum: 0x1f
cdns,phy-input-delay-sd-uhs-sdr12:
description: Value of the delay in the input path for SD UHS SDR12 timing
allOf:
- $ref: "/schemas/types.yaml#/definitions/uint32"
- minimum: 0
- maximum: 0x1f
cdns,phy-input-delay-sd-uhs-sdr25:
description: Value of the delay in the input path for SD UHS SDR25 timing
allOf:
- $ref: "/schemas/types.yaml#/definitions/uint32"
- minimum: 0
- maximum: 0x1f
cdns,phy-input-delay-sd-uhs-sdr50:
description: Value of the delay in the input path for SD UHS SDR50 timing
allOf:
- $ref: "/schemas/types.yaml#/definitions/uint32"
- minimum: 0
- maximum: 0x1f
cdns,phy-input-delay-sd-uhs-ddr50:
description: Value of the delay in the input path for SD UHS DDR50 timing
allOf:
- $ref: "/schemas/types.yaml#/definitions/uint32"
- minimum: 0
- maximum: 0x1f
cdns,phy-input-delay-mmc-highspeed:
description: Value of the delay in the input path for MMC high-speed timing
allOf:
- $ref: "/schemas/types.yaml#/definitions/uint32"
- minimum: 0
- maximum: 0x1f
cdns,phy-input-delay-mmc-ddr:
description: Value of the delay in the input path for eMMC high-speed DDR timing
allOf:
- $ref: "/schemas/types.yaml#/definitions/uint32"
- minimum: 0
- maximum: 0x1f
# PHY DLL clock delays:
# Each delay property represents the fraction of the clock period.
# The approximate delay value will be
# (<delay property value>/128)*sdmclk_clock_period.
cdns,phy-dll-delay-sdclk:
description: |
Value of the delay introduced on the sdclk output for all modes except
HS200, HS400 and HS400_ES.
allOf:
- $ref: "/schemas/types.yaml#/definitions/uint32"
- minimum: 0
- maximum: 0x7f
cdns,phy-dll-delay-sdclk-hsmmc:
description: |
Value of the delay introduced on the sdclk output for HS200, HS400 and
HS400_ES speed modes.
allOf:
- $ref: "/schemas/types.yaml#/definitions/uint32"
- minimum: 0
- maximum: 0x7f
cdns,phy-dll-delay-strobe:
description: |
Value of the delay introduced on the dat_strobe input used in
HS400 / HS400_ES speed modes.
allOf:
- $ref: "/schemas/types.yaml#/definitions/uint32"
- minimum: 0
- maximum: 0x7f
required:
- compatible
- reg
- interrupts
- clocks
examples:
- |
emmc: mmc@5a000000 {
compatible = "socionext,uniphier-sd4hc", "cdns,sd4hc";
reg = <0x5a000000 0x400>;
interrupts = <0 78 4>;
clocks = <&clk 4>;
bus-width = <8>;
mmc-ddr-1_8v;
mmc-hs200-1_8v;
mmc-hs400-1_8v;
cdns,phy-dll-delay-sdclk = <0>;
};
|
