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riscv: dts: canaan: Fix SPI3 bus width 

According to the K210 Standalone SDK Programming guide:
https://canaan-creative.com/wp-content/uploads/2020/03/kendryte_standalone_programming_guide_20190311144158_en.pdf

Section 15.4.3.3:
SPI0 and SPI1 supports: standard, dual, quad and octal transfers.
SPI3 supports: standard, dual and quad transfers (octal is not supported).

In order to support quad transfers (Quad SPI), SPI3 must have four IO wires
connected to the SPI flash.

Update the device tree to specify the correct bus width.

Tested on maix bit, maix dock and maixduino, which all have the same
SPI flash (gd25lq128d) connected to SPI3. maix go is untested, but it
would not make sense for this k210 board to be designed differently.

Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Fixes: 8f5b0e79f3 ("riscv: Add SiPeed MAIXDUINO board device tree")
Fixes: 8194f08bda ("riscv: Add SiPeed MAIX GO board device tree")
Fixes: a40f920964 ("riscv: Add SiPeed MAIX DOCK board device tree")
Fixes: 97c279bcf8 ("riscv: Add SiPeed MAIX BiT board device tree")
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
This commit is contained in:
Niklas Cassel 2022-03-08 14:28:05 +01:00 committed by Palmer Dabbelt
parent bee7fbc385
commit 6846d65610
No known key found for this signature in database
GPG Key ID: 2E1319F35FBB1889
4 changed files with 8 additions and 0 deletions
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2
arch/riscv/boot/dts/canaan/sipeed_maix_bit.dts
View File

@ -203,6 +203,8 @@
compatible = "jedec,spi-nor";
reg = <0>;
spi-max-frequency = <50000000>;
spi-tx-bus-width = <4>;
spi-rx-bus-width = <4>;
m25p,fast-read;
broken-flash-reset;
};

2
arch/riscv/boot/dts/canaan/sipeed_maix_dock.dts
View File

@ -205,6 +205,8 @@
compatible = "jedec,spi-nor";
reg = <0>;
spi-max-frequency = <50000000>;
spi-tx-bus-width = <4>;
spi-rx-bus-width = <4>;
m25p,fast-read;
broken-flash-reset;
};

2
arch/riscv/boot/dts/canaan/sipeed_maix_go.dts
View File

@ -213,6 +213,8 @@
compatible = "jedec,spi-nor";
reg = <0>;
spi-max-frequency = <50000000>;
spi-tx-bus-width = <4>;
spi-rx-bus-width = <4>;
m25p,fast-read;
broken-flash-reset;
};

2
arch/riscv/boot/dts/canaan/sipeed_maixduino.dts
View File

@ -178,6 +178,8 @@
compatible = "jedec,spi-nor";
reg = <0>;
spi-max-frequency = <50000000>;
spi-tx-bus-width = <4>;
spi-rx-bus-width = <4>;
m25p,fast-read;
broken-flash-reset;
};