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Commit 7ecc70a9 authored by Maxime Ripard's avatar Maxime Ripard Committed by Shawn Guo
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ARM: dts: cfa10049: Change the SPI3 bus to spi-gpio 



The DAC found on the last chip select requires a word length of 12 bits,
which is not supported by the SSP controller of the iMX28. Use
bitbanging for that bus to support such a length.

Signed-off-by: default avatarMaxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: default avatarShawn Guo <shawn.guo@linaro.org>
parent e0f7d905

arch/arm/boot/dts/imx28-cfa10049.dts

+42 −36
Original line number Diff line number Diff line
@@ -52,48 +52,17 @@ 
				spi3_pins_cfa10049: spi3-cfa10049@0 {

					reg = <0>;

					fsl,pinmux-ids = <

						0x0181 /* MX28_PAD_GPMI_RDN__SSP3_SCK */

						0x01c1 /* MX28_PAD_GPMI_RESETN__SSP3_CMD */

						0x0111 /* MX28_PAD_GPMI_CE1N__SSP3_D3 */

						0x01a2 /* MX28_PAD_GPMI_ALE__SSP3_D4 */

						0x01b2 /* MX28_PAD_GPMI_CLE__SSP3_D5 */

						0x0183 /* MX28_PAD_GPMI_RDN__GPIO_0_24 */

						0x01c3 /* MX28_PAD_GPMI_RESETN__GPIO_0_28 */

						0x0113 /* MX28_PAD_GPMI_CE1N__GPIO_0_17 */

						0x01a3 /* MX28_PAD_GPMI_ALE__GPIO_0_26 */

						0x01b3 /* MX28_PAD_GPMI_CLE__GPIO_0_27 */

					>;

					fsl,drive-strength = <1>;

					fsl,voltage = <1>;

					fsl,pull-up = <1>;

				};

			};



			ssp3: ssp@80016000 {

				compatible = "fsl,imx28-spi";

				pinctrl-names = "default";

				pinctrl-0 = <&spi3_pins_cfa10049>;

				status = "okay";



				gpio5: gpio5@0 {

					compatible = "fairchild,74hc595";

					gpio-controller;

					#gpio-cells = <2>;

					reg = <0>;

					registers-number = <2>;

					spi-max-frequency = <100000>;

				};



				gpio6: gpio6@1 {

					compatible = "fairchild,74hc595";

					gpio-controller;

					#gpio-cells = <2>;

					reg = <1>;

					registers-number = <4>;

					spi-max-frequency = <100000>;

				};



				dac0: dh2228@2 {

					compatible = "rohm,dh2228fv";

					reg = <2>;

					spi-max-frequency = <100000>;

				};

			};

		};



		apbx@80040000 {
@@ -177,4 +146,41 @@ 
			status = "okay";

		};

	};



	spi3 {

		compatible = "spi-gpio";

		pinctrl-names = "default";

		pinctrl-0 = <&spi3_pins_cfa10049>;

		status = "okay";

		gpio-sck = <&gpio0 24 0>;

		gpio-mosi = <&gpio0 28 0>;

		cs-gpios = <&gpio0 17 0 &gpio0 26 0 &gpio0 27 0>;

		num-chipselects = <3>;

		#address-cells = <1>;

		#size-cells = <0>;



		gpio5: gpio5@0 {

			compatible = "fairchild,74hc595";

			gpio-controller;

			#gpio-cells = <2>;

			reg = <0>;

			registers-number = <2>;

			spi-max-frequency = <100000>;

		};



		gpio6: gpio6@1 {

			compatible = "fairchild,74hc595";

			gpio-controller;

			#gpio-cells = <2>;

			reg = <1>;

			registers-number = <4>;

			spi-max-frequency = <100000>;

		};



		dac0: dh2228@2 {

			compatible = "rohm,dh2228fv";

			reg = <2>;

			spi-max-frequency = <100000>;

		};

	};

};