Commit 51cca920 authored by Cyrille Pitchen's avatar Cyrille Pitchen Committed by Alexandre Belloni
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ARM: dts: at91: sama5d2_xplained: Add QSPI0 + SPI NOR memory nodes 



This patch enables the QSPI0 controller, configures its pin muxing and
declares a jedec,spi-nor memory.

sama5d2 Xplained RevB and RevC use the Macronix MX25L25673G flash
memory which advertises a maximum frequency of 80MHz for Quad IO
Fast Read. Set the spi-max-frequency to 80MHz knowing that actually
the QSPI drver will set the SPI bus clock to 166MHz / 3 = 55.3MHz.

Signed-off-by: default avatarCyrille Pitchen <cyrille.pitchen@microchip.com>
Tested-by: default avatarTudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: default avatarTudor Ambarus <tudor.ambarus@microchip.com>
Link: https://lore.kernel.org/r/20200403061222.1277147-3-tudor.ambarus@microchip.com


Signed-off-by: default avatarAlexandre Belloni <alexandre.belloni@bootlin.com>
parent 0fd3a8f5

arch/arm/boot/dts/at91-sama5d2_xplained.dts

+68 −0
Original line number Diff line number Diff line
@@ -72,6 +72,58 @@ 
		};



		apb {

			qspi0: spi@f0020000 {

				pinctrl-names = "default";

				pinctrl-0 = <&pinctrl_qspi0_default>;

				status = "disabled"; /* conflict with sdmmc1 */



				flash@0 {

					#address-cells = <1>;

					#size-cells = <1>;

					compatible = "jedec,spi-nor";

					reg = <0>;

					spi-max-frequency = <80000000>;

					spi-tx-bus-width = <4>;

					spi-rx-bus-width = <4>;

					m25p,fast-read;



					at91bootstrap@00000000 {

						label = "at91bootstrap";

						reg = <0x00000000 0x00040000>;

					};



					bootloader@00040000 {

						label = "bootloader";

						reg = <0x00040000 0x000c0000>;

					};



					bootloaderenvred@00100000 {

						label = "bootloader env redundant";

						reg = <0x00100000 0x00040000>;

					};



					bootloaderenv@00140000 {

						label = "bootloader env";

						reg = <0x00140000 0x00040000>;

					};



					dtb@00180000 {

						label = "device tree";

						reg = <0x00180000 0x00080000>;

					};



					kernel@00200000 {

						label = "kernel";

						reg = <0x00200000 0x00600000>;

					};



					misc@00800000 {

						label = "misc";

						reg = <0x00800000 0x00000000>;

					};

				};

			};



			spi0: spi@f8000000 {

				pinctrl-names = "default";

				pinctrl-0 = <&pinctrl_spi0_default>;
@@ -535,6 +587,22 @@ 
					bias-disable;

				};



				pinctrl_qspi0_default: qspi0_default {

					sck_cs {

						pinmux = <PIN_PA22__QSPI0_SCK>,

							 <PIN_PA23__QSPI0_CS>;

						bias-disable;

					};



					data {

						pinmux = <PIN_PA24__QSPI0_IO0>,

							 <PIN_PA25__QSPI0_IO1>,

							 <PIN_PA26__QSPI0_IO2>,

							 <PIN_PA27__QSPI0_IO3>;

						bias-pull-up;

					};

				};



				pinctrl_sdmmc0_default: sdmmc0_default {

					cmd_data {

						pinmux = <PIN_PA1__SDMMC0_CMD>,