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 <Meng.Li@windriver.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1043a-rdb.dts b/arch/arm64/boot/dts/freescale/fsl-ls1043a-rdb.dts
index 3516af4726a5d69996355832f1fcd2dcc0f5b430..b290605e92cfb53e0452bb669d26ca685275fd05 100644 (file)
--- 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 {