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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: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
hifive-unleashed-5.1
Peter Ujfalusi 2018-12-13 15:58:45 +02:00 committed by Tony Lindgren
parent dc81e8465d
commit b4c30df0eb
1 changed files with 30 additions and 0 deletions
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30
arch/arm/boot/dts/omap4-sdp.dts
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@ -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>;
};
};