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https://github.com/AsahiLinux/u-boot
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fd426b3106
"kendryte" is the marketing name for the K210 RISC-V SoC produced by Canaan Inc. Rather than "kendryte,k210", use the usual "canaan,k210" vendor,SoC compatibility string format in the device tree files and use the SoC name for file names. With these changes, the device tree files are more in sync with the Linux kernel DTS and drivers, making uboot device tree usable by the kernel. Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com> Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
56 lines
2 KiB
Text
56 lines
2 KiB
Text
Synopsys DesignWare AMBA 2.0 Synchronous Serial Interface
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and Synopsys DesignWare High Performance Synchronous Serial Interface
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Required properties:
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- compatible : One of
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"altr,socfpga-spi",
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"altr,socfpga-arria10-spi",
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"canaan,k210-spi",
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"canaan,k210-ssi",
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"intel,stratix10-spi",
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"intel,agilex-spi",
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"mscc,ocelot-spi",
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or "mscc,jaguar2-spi";
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and one of
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"snps,dw-apb-ssi-3.20a",
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"snps,dw-apb-ssi-3.22a",
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"snps,dw-apb-ssi-3.23",
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"snps,dw-apb-ssi-4.00a",
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"snps,dw-apb-ssi-4.01",
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or "snps,dwc-ssi-1.01a".
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"snps,dw-apb-ssi" may also be used, but is deprecated in favor of specific
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version strings.
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- reg : The register base for the controller. For "mscc,<soc>-spi", a second
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register set is required (named ICPU_CFG:SPI_MST)
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- #address-cells : <1>, as required by generic SPI binding.
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- #size-cells : <0>, also as required by generic SPI binding.
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- clocks : phandles for the clocks, see the description of clock-names below.
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The phandle for the "ssi_clk" is required. The phandle for the "pclk" clock
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is optional. If a single clock is specified but no clock-name, it is the
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"ssi_clk" clock. If both clocks are listed, the "ssi_clk" must be first.
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Optional properties:
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- clock-names : Contains the names of the clocks:
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"ssi_clk", for the core clock used to generate the external SPI clock.
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"pclk", the interface clock, required for register access.
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- cs-gpios : Specifies the gpio pins to be used for chipselects.
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- num-cs : The number of chipselects. If omitted, this will default to 4.
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- reg-io-width : The I/O register width (in bytes) implemented by this
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device. Supported values are 2 or 4 (the default).
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Child nodes as per the generic SPI binding.
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Example:
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spi@fff00000 {
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compatible = "altr,socfpga-arria10-spi",
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"snps,dw-apb-ssi-4.00a", "snps,dw-apb-ssi";
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reg = <0xfff00000 0x1000>;
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interrupts = <0 154 4>;
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#address-cells = <1>;
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#size-cells = <0>;
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clocks = <&spi_m_clk>;
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num-cs = <2>;
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cs-gpios = <&gpio0 13 0>,
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<&gpio0 14 0>;
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};
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