linux-kernel - [PATCH] ARC: [plat-hsdk]: enable DW SPI controller

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Date:   Fri,  7 Jun 2019 17:48:00 +0300
From:   Eugeniy Paltsev <Eugeniy.Paltsev@...opsys.com>
To:     linux-snps-arc@...ts.infradead.org,
        Vineet Gupta <Vineet.Gupta1@...opsys.com>
Cc:     linux-kernel@...r.kernel.org,
        Alexey Brodkin <Alexey.Brodkin@...opsys.com>,
        Eugeniy Paltsev <Eugeniy.Paltsev@...opsys.com>
Subject: [PATCH] ARC: [plat-hsdk]: enable DW SPI controller

HSDK SoC has DW SPI controller. Enable it in preparation of
enabling on-board SPI peripherals.

Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@...opsys.com>
---
 arch/arc/boot/dts/hsdk.dts      | 14 ++++++++++++++
 arch/arc/configs/hsdk_defconfig |  3 +++
 2 files changed, 17 insertions(+)

diff --git a/arch/arc/boot/dts/hsdk.dts b/arch/arc/boot/dts/hsdk.dts
index e57b24dd02e7..42e1c961ba48 100644
--- a/arch/arc/boot/dts/hsdk.dts
+++ b/arch/arc/boot/dts/hsdk.dts
@@ -11,6 +11,7 @@
  */
 /dts-v1/;
 
+#include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/reset/snps,hsdk-reset.h>
 
 / {
@@ -233,6 +234,19 @@
 			dma-coherent;
 		};
 
+		spi0: spi@...00 {
+			compatible = "snps,dw-apb-ssi";
+			reg = <0x20000 0x100>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			interrupts = <16>;
+			num-cs = <2>;
+			reg-io-width = <4>;
+			clocks = <&input_clk>;
+			cs-gpios = <&creg_gpio 0 GPIO_ACTIVE_LOW>,
+				   <&creg_gpio 1 GPIO_ACTIVE_LOW>;
+		};
+
 		creg_gpio: gpio@...0 {
 			compatible = "snps,creg-gpio-hsdk";
 			reg = <0x14b0 0x4>;
diff --git a/arch/arc/configs/hsdk_defconfig b/arch/arc/configs/hsdk_defconfig
index 0c4411f50948..ccfa744fe755 100644
--- a/arch/arc/configs/hsdk_defconfig
+++ b/arch/arc/configs/hsdk_defconfig
@@ -46,6 +46,9 @@ CONFIG_SERIAL_8250_CONSOLE=y
 CONFIG_SERIAL_8250_DW=y
 CONFIG_SERIAL_OF_PLATFORM=y
 # CONFIG_HW_RANDOM is not set
+CONFIG_SPI=y
+CONFIG_SPI_DESIGNWARE=y
+CONFIG_SPI_DW_MMIO=y
 CONFIG_GPIOLIB=y
 CONFIG_GPIO_SYSFS=y
 CONFIG_GPIO_DWAPB=y
-- 
2.21.0