From: Meng Li Date: Wed, 3 Nov 2021 03:38:38 +0000 (+0800) Subject: arm64: dts: fsl-ls1043a-rdb: add delay between CS and CLK signal for flash device X-Git-Tag: v6.6.17~8522^2~12^2~53 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=745fa3e40ff5245c8551f2ec9ad9d3c77c8065e7;p=platform%2Fkernel%2Flinux-rpi.git arm64: dts: fsl-ls1043a-rdb: add delay between CS and CLK signal for flash device Based on commit d59c90a2400f("spi: spi-fsl-dspi: Convert TCFQ users to XSPI FIFO mode ") and 6c1c26ecd9a3("spi: spi-fsl-dspi: Accelerate transfers using larger word size if possible"), on ls1043a-rdb platform, the spi work mode is changed from TCFQ mode to XSPI mode. In order to keep the transmission sequence matches with flash device, it is need to add delay between CS and CLK signal. The strategy of generating delay value refers to QorIQ LS1043A Reference Manual. Signed-off-by: Meng Li Signed-off-by: Shawn Guo --- diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1043a-rdb.dts b/arch/arm64/boot/dts/freescale/fsl-ls1043a-rdb.dts index 3516af4..b290605 100644 --- a/arch/arm64/boot/dts/freescale/fsl-ls1043a-rdb.dts +++ b/arch/arm64/boot/dts/freescale/fsl-ls1043a-rdb.dts @@ -94,6 +94,8 @@ compatible = "n25q128a13", "jedec,spi-nor"; /* 16MB */ reg = <0>; spi-max-frequency = <1000000>; /* input clock */ + fsl,spi-cs-sck-delay = <100>; + fsl,spi-sck-cs-delay = <100>; }; slic@2 {