247 lines
7.1 KiB
YAML
247 lines
7.1 KiB
YAML
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# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/mmc/arm,pl18x.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: ARM PrimeCell MultiMedia Card Interface (MMCI) PL180 and PL181
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maintainers:
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- Linus Walleij <linus.walleij@linaro.org>
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- Ulf Hansson <ulf.hansson@linaro.org>
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description:
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The ARM PrimeCells MMCI PL180 and PL181 provides an interface for
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reading and writing to MultiMedia and SD cards alike. Over the years
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vendors have use the VHDL code from ARM to create derivative MMC/SD/SDIO
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host controllers with very similar characteristics.
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allOf:
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- $ref: /schemas/arm/primecell.yaml#
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- $ref: mmc-controller.yaml#
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# We need a select here so we don't match all nodes with 'arm,primecell'
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select:
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properties:
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compatible:
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contains:
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enum:
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- arm,pl180
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- arm,pl181
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- arm,pl18x
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required:
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- compatible
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properties:
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compatible:
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oneOf:
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- description: The first version of the block, simply called
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PL180 and found in the ARM Integrator IM/PD1 logic module.
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items:
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- const: arm,pl180
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- const: arm,primecell
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- description: The improved version of the block, found in the
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ARM Versatile and later reference designs. Further revisions
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exist but get detected at runtime by reading some magic numbers
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in the PrimeCell ID registers.
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items:
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- const: arm,pl181
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- const: arm,primecell
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- description: Wildcard entry that will let the operating system
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inspect the PrimeCell ID registers to determine which hardware
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variant of PL180 or PL181 this is.
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items:
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- const: arm,pl18x
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- const: arm,primecell
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- description: Entry for STMicroelectronics variant of PL18x.
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This dedicated compatible is used by bootloaders.
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items:
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- const: st,stm32-sdmmc2
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- const: arm,pl18x
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- const: arm,primecell
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clocks:
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description: One or two clocks, the "apb_pclk" and the "MCLK"
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which is the core block clock. The names are not compulsory.
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minItems: 1
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maxItems: 2
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dmas:
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maxItems: 2
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dma-names:
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oneOf:
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- items:
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- const: tx
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- const: rx
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- items:
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- const: rx
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- const: tx
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power-domains: true
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resets:
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maxItems: 1
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reg:
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description: the MMIO memory window must be exactly 4KB (0x1000) and the
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layout should provide the PrimeCell ID registers so that the device can
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be discovered. On ST Micro variants, a second register window may be
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defined if a delay block is present and used for tuning.
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interrupts:
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description: The first interrupt is the command interrupt and corresponds
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to the event at the end of a command. The second interrupt is the
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PIO (polled I/O) interrupt and occurs when the FIFO needs to be
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emptied as part of a bulk read from the card. Some variants have these
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two interrupts wired into the same line (logic OR) and in that case
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only one interrupt may be provided. The interrupt-names property is
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not used due to inconsistency of existing DTs regarding its content.
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deprecated: false
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minItems: 1
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maxItems: 2
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st,sig-dir-dat0:
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$ref: /schemas/types.yaml#/definitions/flag
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description: ST Micro-specific property, bus signal direction pins used for
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DAT[0].
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st,sig-dir-dat2:
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$ref: /schemas/types.yaml#/definitions/flag
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description: ST Micro-specific property, bus signal direction pins used for
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DAT[2].
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st,sig-dir-dat31:
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$ref: /schemas/types.yaml#/definitions/flag
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description: ST Micro-specific property, bus signal direction pins used for
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DAT[3] and DAT[1].
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st,sig-dir-dat74:
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$ref: /schemas/types.yaml#/definitions/flag
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description: ST Micro-specific property, bus signal direction pins used for
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DAT[7] and DAT[4].
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st,sig-dir-cmd:
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$ref: /schemas/types.yaml#/definitions/flag
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description: ST Micro-specific property, CMD signal direction used for
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pin CMD.
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st,sig-pin-fbclk:
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$ref: /schemas/types.yaml#/definitions/flag
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description: ST Micro-specific property, feedback clock FBCLK signal pin
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in use.
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st,sig-dir:
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$ref: /schemas/types.yaml#/definitions/flag
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description: ST Micro-specific property, signal direction polarity used for
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pins CMD, DAT[0], DAT[1], DAT[2] and DAT[3].
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st,neg-edge:
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$ref: /schemas/types.yaml#/definitions/flag
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description: ST Micro-specific property, data and command phase relation,
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generated on the sd clock falling edge.
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st,use-ckin:
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$ref: /schemas/types.yaml#/definitions/flag
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description: ST Micro-specific property, use CKIN pin from an external
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driver to sample the receive data (for example with a voltage switch
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transceiver).
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st,cmd-gpios:
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maxItems: 1
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description:
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The GPIO matching the CMD pin.
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st,ck-gpios:
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maxItems: 1
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description:
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The GPIO matching the CK pin.
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st,ckin-gpios:
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maxItems: 1
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description:
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The GPIO matching the CKIN pin.
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dependencies:
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st,cmd-gpios: [ "st,use-ckin" ]
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st,ck-gpios: [ "st,use-ckin" ]
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st,ckin-gpios: [ "st,use-ckin" ]
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unevaluatedProperties: false
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required:
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- compatible
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- reg
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- interrupts
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examples:
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- |
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#include <dt-bindings/interrupt-controller/irq.h>
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#include <dt-bindings/gpio/gpio.h>
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mmc@5000 {
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compatible = "arm,pl180", "arm,primecell";
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reg = <0x5000 0x1000>;
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interrupts-extended = <&vic 22 &sic 1>;
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clocks = <&xtal24mhz>, <&pclk>;
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clock-names = "mclk", "apb_pclk";
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};
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- |
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#include <dt-bindings/interrupt-controller/irq.h>
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mmc@80126000 {
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compatible = "arm,pl18x", "arm,primecell";
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reg = <0x80126000 0x1000>;
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interrupts = <0 60 IRQ_TYPE_LEVEL_HIGH>;
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dmas = <&dma 29 0 0x2>, <&dma 29 0 0x0>;
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dma-names = "rx", "tx";
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clocks = <&prcc_kclk 1 5>, <&prcc_pclk 1 5>;
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clock-names = "sdi", "apb_pclk";
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max-frequency = <100000000>;
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bus-width = <4>;
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cap-sd-highspeed;
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cap-mmc-highspeed;
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cd-gpios = <&gpio2 31 0x4>;
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st,sig-dir-dat0;
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st,sig-dir-dat2;
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st,sig-dir-cmd;
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st,sig-pin-fbclk;
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vmmc-supply = <&ab8500_ldo_aux3_reg>;
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vqmmc-supply = <&vmmci>;
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};
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- |
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mmc@101f6000 {
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compatible = "arm,pl18x", "arm,primecell";
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reg = <0x101f6000 0x1000>;
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clocks = <&sdiclk>, <&pclksdi>;
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clock-names = "mclk", "apb_pclk";
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interrupts = <22>;
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max-frequency = <400000>;
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bus-width = <4>;
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cap-mmc-highspeed;
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cap-sd-highspeed;
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full-pwr-cycle;
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st,sig-dir-dat0;
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st,sig-dir-dat2;
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st,sig-dir-dat31;
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st,sig-dir-cmd;
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st,sig-pin-fbclk;
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vmmc-supply = <&vmmc_regulator>;
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};
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- |
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mmc@52007000 {
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compatible = "arm,pl18x", "arm,primecell";
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arm,primecell-periphid = <0x10153180>;
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reg = <0x52007000 0x1000>;
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interrupts = <49>;
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clocks = <&rcc 0>;
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clock-names = "apb_pclk";
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resets = <&rcc 1>;
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cap-sd-highspeed;
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cap-mmc-highspeed;
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max-frequency = <120000000>;
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};
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