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ARC: HSDK: Enable SPI flash support

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HSDK board has sst26wf016 SPI flash IC which we want to support.

Add SPI controller, CS-gpio and SPI flash nodes to hsdk device tree.
Enable corresponding options in hsdk defconfig.

For SPI write functionality to work we need [1] which
adds support of sst26xxx ICs.

[1] https://patchwork.ozlabs.org/project/uboot/list/?series=35796

Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
This commit is contained in:
Eugeniy Paltsev 2018-03-26 15:57:38 +03:00 committed by Alexey Brodkin
parent ada8affdfe
commit f770b3ee18
2 changed files with 35 additions and 0 deletions
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26
arch/arc/dts/hsdk.dts
View file

@ -14,6 +14,7 @@
aliases {
console = &uart0;
spi0 = &spi0;
};
cpu_card {
@ -83,4 +84,29 @@
compatible = "generic-ohci";
reg = <0xf0060000 0x100>;
};
spi0: spi@f0020000 {
compatible = "snps,dw-apb-ssi";
reg = <0xf0020000 0x1000>;
#address-cells = <1>;
#size-cells = <0>;
spi-max-frequency = <4000000>;
clocks = <&cgu_clk CLK_SYS_SPI_REF>;
clock-names = "spi_clk";
cs-gpio = <&cs_gpio 0>;
spi_flash@0 {
compatible = "spi-flash";
reg = <0>;
spi-max-frequency = <4000000>;
};
};
cs_gpio: gpio@f00014b0 {
compatible = "snps,hsdk-creg-gpio";
reg = <0xf00014b0 0x4>;
gpio-controller;
#gpio-cells = <1>;
gpio-bank-name = "hsdk-spi-cs";
gpio-count = <1>;
};
};

9
configs/hsdk_defconfig
View file

@ -12,6 +12,8 @@ CONFIG_SYS_PROMPT="hsdk# "
CONFIG_CMD_ENV_FLAGS=y
# CONFIG_CMD_FLASH is not set
CONFIG_CMD_MMC=y
CONFIG_CMD_SF=y
CONFIG_CMD_SPI=y
CONFIG_CMD_USB=y
# CONFIG_CMD_SETEXPR is not set
CONFIG_CMD_DHCP=y
@ -29,12 +31,19 @@ CONFIG_ENV_FAT_DEVICE_AND_PART="0:1"
CONFIG_NET_RANDOM_ETHADDR=y
CONFIG_DM=y
CONFIG_CLK_HSDK=y
CONFIG_DM_GPIO=y
CONFIG_HSDK_CREG_GPIO=y
CONFIG_MMC=y
CONFIG_MMC_DW=y
CONFIG_DM_SPI_FLASH=y
CONFIG_SPI_FLASH=y
CONFIG_SPI_FLASH_SST=y
CONFIG_DM_ETH=y
CONFIG_ETH_DESIGNWARE=y
CONFIG_DM_SERIAL=y
CONFIG_SYS_NS16550=y
CONFIG_DM_SPI=y
CONFIG_DESIGNWARE_SPI=y
CONFIG_USB=y
CONFIG_DM_USB=y
CONFIG_USB_EHCI_HCD=y