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ARM: dts: wheat: add Ethernet support

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R8A7792  SoC  doesn't have the  EtherMAC core, so SMSC LAN89218 Ethernet
chip was used instead on the Wheat debug board; this chip is compatible
with SMSC LAN9115 for which  there's a (device  tree aware)  driver.
Describe the chip  in the Wheat device tree unconditionally (the driver
should fail the probe if the debug board isn't connected); enable DHCP and
NFS root in the command line for the kernel boot...

Based  on the original (and large) patch by Vladimir Barinov
<vladimir.barinov@cogentembedded.com>.

Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
This commit is contained in:
Sergei Shtylyov 2016-08-26 23:23:13 +03:00 committed by Simon Horman
parent 5f45cec404
commit 1d9a17dd3f
1 changed files with 37 additions and 1 deletions
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38
arch/arm/boot/dts/r8a7792-wheat.dts
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@ -21,7 +21,7 @@
};
chosen {
bootargs = "ignore_loglevel";
bootargs = "ignore_loglevel rw root=/dev/nfs ip=dhcp";
stdout-path = "serial0:115200n8";
};
@ -29,6 +29,31 @@
device_type = "memory";
reg = <0 0x40000000 0 0x40000000>;
};
d3_3v: regulator-3v3 {
compatible = "regulator-fixed";
regulator-name = "D3.3V";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
regulator-boot-on;
regulator-always-on;
};
ethernet@18000000 {
compatible = "smsc,lan89218", "smsc,lan9115";
reg = <0 0x18000000 0 0x100>;
phy-mode = "mii";
interrupt-parent = <&irqc>;
interrupts = <0 IRQ_TYPE_EDGE_FALLING>;
smsc,irq-push-pull;
smsc,save-mac-address;
reg-io-width = <4>;
vddvario-supply = <&d3_3v>;
vdd33a-supply = <&d3_3v>;
pinctrl-0 = <&lan89218_pins>;
pinctrl-names = "default";
};
};
&extal_clk {
@ -40,6 +65,17 @@
groups = "scif0_data";
function = "scif0";
};
lan89218_pins: lan89218 {
intc {
groups = "intc_irq0";
function = "intc";
};
lbsc {
groups = "lbsc_ex_cs0";
function = "lbsc";
};
};
};
&scif0 {