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@xxxxxxxxxxxxxxxxxx>.
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@xxxxxxxxxxxxxxxxxx>
---
arch/arm/boot/dts/r8a7792-wheat.dts | 38 +++++++++++++++++++++++++++++++++++-
1 file changed, 37 insertions(+), 1 deletion(-)
Index: renesas/arch/arm/boot/dts/r8a7792-wheat.dts
===================================================================
--- renesas.orig/arch/arm/boot/dts/r8a7792-wheat.dts
+++ renesas/arch/arm/boot/dts/r8a7792-wheat.dts
@@ -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 {
