diff options
| author | Peter Ujfalusi <peter.ujfalusi@ti.com> | 2018-12-13 14:58:45 +0100 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2019-01-24 17:23:43 +0100 |
| commit | b4c30df0eb354d8e081132b7b7449f6d17619614 (patch) | |
| tree | 8ff9962ed368f9ca67c4688a476e622261ff6f81 /arch/arm/boot/dts/omap4-sdp.dts | |
| parent | ARM: dts: am335x-shc.dts: Switch to SPDX identifier (diff) | |
| download | linux-b4c30df0eb354d8e081132b7b7449f6d17619614.tar.xz linux-b4c30df0eb354d8e081132b7b7449f6d17619614.zip | |
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>
Diffstat (limited to 'arch/arm/boot/dts/omap4-sdp.dts')
| -rw-r--r-- | arch/arm/boot/dts/omap4-sdp.dts | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/omap4-sdp.dts b/arch/arm/boot/dts/omap4-sdp.dts index 9dc7ec7655cb..c88817bdcc56 100644 --- a/arch/arm/boot/dts/omap4-sdp.dts +++ b/arch/arm/boot/dts/omap4-sdp.dts @@ -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>; }; }; |