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Commit b4c30df0 authored by Peter Ujfalusi's avatar Peter Ujfalusi Committed by Tony Lindgren
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ARM: dts: omap4-sdp: Make ethernet working even if booted with latest u-boot 



The ethernet works in kernel only if we use some binary u-boot from the
past which have support for KS8851.

The u-boot sources are not available for this mysterious u-boot image
people tends to hold on... Mainline u-bott does not have ethernet support
for sdp4430 and if we use that the ethernet is not working.

After some debugging I have managed to get the ethernet working with
mainline u-boot while not breaking the networking with the case when we
boot with the mysterious binary u-boot.

Basically we were missing bunch of pinmux settings and the 'magic'
gpio_138 handling in kernel.

Signed-off-by: default avatarPeter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
parent dc81e846

arch/arm/boot/dts/omap4-sdp.dts

+30 −0
Original line number Diff line number Diff line
@@ -26,6 +26,9 @@ 
	};



	vdd_eth: fixedregulator-vdd-eth {

		pinctrl-names = "default";

		pinctrl-0 = <&enet_enable_gpio>;



		compatible = "regulator-fixed";

		regulator-name = "VDD_ETH";

		regulator-min-microvolt = <3300000>;
@@ -352,6 +355,29 @@ 
			OMAP4_IOPAD(0x152, PIN_INPUT_PULLUP | MUX_MODE0)	/* sdmmc5_dat3.sdmmc5_dat3 */

		>;

	};



	/* gpio_48 for ENET_ENABLE */

	enet_enable_gpio: pinmux_enet_enable_gpio {

		pinctrl-single,pins = <

			OMAP4_IOPAD(0x070, PIN_OUTPUT_PULLDOWN | MUX_MODE3)	/* gpmc_a24.gpio_48 */

		>;

	};



	ks8851_pins: pinmux_ks8851_pins {

		pinctrl-single,pins = <

			/* ENET_INT */

			OMAP4_IOPAD(0x054, PIN_INPUT_PULLUP | MUX_MODE3)	/* gpmc_ad10.gpio_34 */

			/*

			 * Misterious pin which makes the ethernet working

			 * The legacy board file requested this pin on boot

			 * (ETH_KS8851_QUART) and set it to high, similarly to

			 * the ENET_ENABLE pin.

			 * We could use gpio-hog to keep it high, but let's use

			 * it as a reset GPIO for ks8851.

			 */

			OMAP4_IOPAD(0x13a, PIN_OUTPUT_PULLUP | MUX_MODE3)	/* mcspi1_cs1.gpio_138 */

		>;

	};

};



&i2c1 {
@@ -452,12 +478,16 @@ 
	pinctrl-0 = <&mcspi1_pins>;



	eth@0 {

		pinctrl-names = "default";

		pinctrl-0 = <&ks8851_pins>;



		compatible = "ks8851";

		spi-max-frequency = <24000000>;

		reg = <0>;

		interrupt-parent = <&gpio2>;

		interrupts = <2 IRQ_TYPE_LEVEL_LOW>; /* gpio line 34 */

		vdd-supply = <&vdd_eth>;

		reset-gpios = <&gpio5 10 GPIO_ACTIVE_HIGH>;

	};

};