在 2022/3/27 12:38, Sui Jingfeng 写道:
Add DT bindings and simple usages for Loongson display controller
found in LS7A1000 bridges chip and LS2k1000 SoC.
Signed-off-by: Sui Jingfeng <15330273260@xxxxxx>
[...]
+
+ - |
+ #include <dt-bindings/interrupt-controller/irq.h>
+ bus {
+
+ #address-cells = <3>;
+ #size-cells = <2>;
+ #interrupt-cells = <2>;
+
+ display-controller@6,1 {
+ compatible = "loongson,ls7a1000-dc";
+ reg = <0x3100 0x0 0x0 0x0 0x0>;
+ interrupts = <28 IRQ_TYPE_LEVEL_HIGH>;
+
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ i2c@6 {
+ compatible = "loongson,gpio-i2c";
+ reg = <0x00001650 0x00000020>;
Hi Jingfeng,
Thanks for your patch.
Just curious about what is this "reg" for?
+ loongson,nr = <6>;
Why nr start from 6?
The approach you are handling I2C seems to be wired..
Actually you can reference how network subsystem is handling
MDIO controller built-in into Ethernet controller [1] in this case. It is
basically the same problem.
[1]:
https://elixir.bootlin.com/linux/latest/source/Documentation/devicetree/bindings/net/snps,dwmac.yaml
Thanks.
- Jiaxun
+ loongson,sda = <0>;
+ loongson,scl = <1>;
+ loongson,udelay = <5>;
+ loongson,timeout = <2200>;
+ };
+
+ i2c@7 {
+ compatible = "loongson,gpio-i2c";
+ reg = <0x00001650 0x00000020>;
+ loongson,nr = <7>;
+ loongson,sda = <2>;
+ loongson,scl = <3>;
+ loongson,udelay = <5>;
+ loongson,timeout = <2200>;
+ };
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ port@0 {
+ reg = <0>;
+ endpoint {
+ remote-endpoint = <&vga_encoder_in>;
+ };
+ };
+
+ port@1 {
+ reg = <1>;
+ endpoint {
+ remote-endpoint = <&dvi_encoder_in>;
+ };
+ };
+ };
+ };
+ };
+
+ - |
+ #include <dt-bindings/interrupt-controller/irq.h>
+ bus {
+
+ #address-cells = <3>;
+ #size-cells = <2>;
+ #interrupt-cells = <2>;
+
+ display-controller@6,0 {
+ compatible = "loongson,ls2k1000-dc";
+ reg = <0x3100 0x0 0x0 0x0 0x0>;
+ interrupts = <28 IRQ_TYPE_LEVEL_HIGH>;
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ port@0 {
+ reg = <0>;
+ endpoint {
+ remote-endpoint = <&panel_in>;
+ };
+ };
+
+ port@1 {
+ reg = <1>;
+ endpoint {
+ remote-endpoint = <&hdmi_encoder_in>;
+ };
+ };
+ };
+ };
+ };
+...
