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# SPDX-License-Identifier: GPL-2.0
%YAML 1.2
---
$id: http://devicetree.org/schemas/mmc/rockchip-dw-mshc.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Rockchip designware mobile storage host controller device tree bindings
description:
Rockchip uses the Synopsys designware mobile storage host controller
to interface a SoC with storage medium such as eMMC or SD/MMC cards.
This file documents the combined properties for the core Synopsys dw mshc
controller that are not already included in the synopsys-dw-mshc-common.yaml
file and the Rockchip specific extensions.
allOf:
- $ref: "synopsys-dw-mshc-common.yaml#"
maintainers:
- Heiko Stuebner <heiko@sntech.de>
# Everything else is described in the common file
properties:
compatible:
oneOf:
# for Rockchip RK2928 and before RK3288
- const: rockchip,rk2928-dw-mshc
# for Rockchip RK3288
- const: rockchip,rk3288-dw-mshc
- items:
- enum:
# for Rockchip PX30
- rockchip,px30-dw-mshc
# for Rockchip RK3036
- rockchip,rk3036-dw-mshc
# for Rockchip RK322x
- rockchip,rk3228-dw-mshc
# for Rockchip RK3308
- rockchip,rk3308-dw-mshc
# for Rockchip RK3328
- rockchip,rk3328-dw-mshc
# for Rockchip RK3368
- rockchip,rk3368-dw-mshc
# for Rockchip RK3399
- rockchip,rk3399-dw-mshc
# for Rockchip RV1108
- rockchip,rv1108-dw-mshc
- const: rockchip,rk3288-dw-mshc
reg:
maxItems: 1
interrupts:
maxItems: 1
clocks:
minItems: 2
maxItems: 4
description:
Handle to "biu" and "ciu" clocks for the bus interface unit clock and
the card interface unit clock. If "ciu-drive" and "ciu-sample" are
specified in clock-names, it should also contain
handles to these clocks.
clock-names:
minItems: 2
items:
- const: biu
- const: ciu
- const: ciu-drive
- const: ciu-sample
description:
Apart from the clock-names "biu" and "ciu" two more clocks
"ciu-drive" and "ciu-sample" are supported. They are used
to control the clock phases, "ciu-sample" is required for tuning
high speed modes.
rockchip,default-sample-phase:
allOf:
- $ref: /schemas/types.yaml#/definitions/uint32
minimum: 0
maximum: 360
default: 0
description:
The default phase to set "ciu-sample" at probing,
low speeds or in case where all phases work at tuning time.
If not specified 0 deg will be used.
rockchip,desired-num-phases:
allOf:
- $ref: /schemas/types.yaml#/definitions/uint32
minimum: 0
maximum: 360
default: 360
description:
The desired number of times that the host execute tuning when needed.
If not specified, the host will do tuning for 360 times,
namely tuning for each degree.
required:
- compatible
- reg
- interrupts
- clocks
- clock-names
examples:
- |
#include <dt-bindings/clock/rk3288-cru.h>
#include <dt-bindings/interrupt-controller/arm-gic.h>
#include <dt-bindings/interrupt-controller/irq.h>
sdmmc: mmc@ff0c0000 {
compatible = "rockchip,rk3288-dw-mshc";
reg = <0x0 0xff0c0000 0x0 0x4000>;
interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&cru HCLK_SDMMC>, <&cru SCLK_SDMMC>,
<&cru SCLK_SDMMC_DRV>, <&cru SCLK_SDMMC_SAMPLE>;
clock-names = "biu", "ciu", "ciu-drive", "ciu-sample";
resets = <&cru SRST_MMC0>;
reset-names = "reset";
fifo-depth = <0x100>;
max-frequency = <150000000>;
};
...
|
