ARM: dts: lager: use demuxer for IIC2/I2C2

Create a separate bus for HDMI related I2C slaves.

Based on work by Wolfram Sang.

Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
[wsa: rebased, removed typo in comment, fixed aliases, switched to
named GPIOS, sort SCL pins first]
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>

diff --git a/arch/arm/boot/dts/r8a7790-lager.dts b/arch/arm/boot/dts/r8a7790-lager.dts
index 7892b11..9f511d4 100644 (file)
--- a/arch/arm/boot/dts/r8a7790-lager.dts
+++ b/arch/arm/boot/dts/r8a7790-lager.dts
@@ -51,8 +51,10 @@
                serial0 = &scif0;
                serial1 = &scifa1;
                i2c8 = &gpioi2c1;
+               i2c9 = &gpioi2c2;
                i2c10 = &i2cexio0;
                i2c11 = &i2cexio1;
+               i2c12 = &i2chdmi;
        };
 
        chosen {
@@ -272,8 +274,18 @@
                #size-cells = <0>;
                compatible = "i2c-gpio";
                status = "disabled";
-               sda-gpios = <&gpio1 17 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
                scl-gpios = <&gpio1 16 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+               sda-gpios = <&gpio1 17 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+               i2c-gpio,delay-us = <5>;
+       };
+
+       gpioi2c2: i2c-9 {
+               #address-cells = <1>;
+               #size-cells = <0>;
+               compatible = "i2c-gpio";
+               status = "disabled";
+               scl-gpios = <&gpio5 5 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+               sda-gpios = <&gpio5 6 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
                i2c-gpio,delay-us = <5>;
        };
 
@@ -308,6 +320,104 @@
                #address-cells = <1>;
                #size-cells = <0>;
        };
+
+        /*
+         * IIC2 and I2C2 may be switched using pinmux.
+         * A fallback to GPIO is also provided.
+         */
+       i2chdmi: i2c-12 {
+               compatible = "i2c-demux-pinctrl";
+               i2c-parent = <&iic2>, <&i2c2>, <&gpioi2c2>;
+               i2c-bus-name = "i2c-hdmi";
+               #address-cells = <1>;
+               #size-cells = <0>;
+
+               ak4643: codec@12 {
+                       compatible = "asahi-kasei,ak4643";
+                       #sound-dai-cells = <0>;
+                       reg = <0x12>;
+               };
+
+               composite-in@20 {
+                       compatible = "adi,adv7180";
+                       reg = <0x20>;
+                       remote = <&vin1>;
+
+                       port {
+                               adv7180: endpoint {
+                                       bus-width = <8>;
+                                       remote-endpoint = <&vin1ep0>;
+                               };
+                       };
+               };
+
+               cec_clock: cec-clock {
+                       compatible = "fixed-clock";
+                       #clock-cells = <0>;
+                       clock-frequency = <12000000>;
+               };
+
+               hdmi@39 {
+                       compatible = "adi,adv7511w";
+                       reg = <0x39>;
+                       interrupt-parent = <&gpio1>;
+                       interrupts = <15 IRQ_TYPE_LEVEL_LOW>;
+                       clocks = <&cec_clock>;
+                       clock-names = "cec";
+
+                       adi,input-depth = <8>;
+                       adi,input-colorspace = "rgb";
+                       adi,input-clock = "1x";
+                       adi,input-style = <1>;
+                       adi,input-justification = "evenly";
+
+                       ports {
+                               #address-cells = <1>;
+                               #size-cells = <0>;
+
+                               port@0 {
+                                       reg = <0>;
+                                       adv7511_in: endpoint {
+                                               remote-endpoint = <&du_out_lvds0>;
+                                       };
+                               };
+
+                               port@1 {
+                                       reg = <1>;
+                                       adv7511_out: endpoint {
+                                               remote-endpoint = <&hdmi_con_out>;
+                                       };
+                               };
+                       };
+               };
+
+               hdmi-in@4c {
+                       compatible = "adi,adv7612";
+                       reg = <0x4c>;
+                       interrupt-parent = <&gpio1>;
+                       interrupts = <20 IRQ_TYPE_LEVEL_LOW>;
+                       default-input = <0>;
+
+                       ports {
+                               #address-cells = <1>;
+                               #size-cells = <0>;
+
+                               port@0 {
+                                       reg = <0>;
+                                       adv7612_in: endpoint {
+                                               remote-endpoint = <&hdmi_con_in>;
+                                       };
+                               };
+
+                               port@2 {
+                                       reg = <2>;
+                                       adv7612_out: endpoint {
+                                               remote-endpoint = <&vin0ep2>;
+                                       };
+                               };
+                       };
+               };
+       };
 };
 
 &du {
@@ -437,6 +547,11 @@
                function = "iic1";
        };
 
+       i2c2_pins: i2c2 {
+               groups = "i2c2";
+               function = "i2c2";
+       };
+
        iic2_pins: iic2 {
                groups = "iic2";
                function = "iic2";
@@ -643,98 +758,18 @@
        pinctrl-names = "i2c-exio1";
 };
 
-&iic2  {
-       status = "okay";
-       pinctrl-0 = <&iic2_pins>;
-       pinctrl-names = "default";
+&i2c2  {
+       pinctrl-0 = <&i2c2_pins>;
+       pinctrl-names = "i2c-hdmi";
 
        clock-frequency = <100000>;
+};
 
-       ak4643: codec@12 {
-               compatible = "asahi-kasei,ak4643";
-               #sound-dai-cells = <0>;
-               reg = <0x12>;
-       };
-
-       composite-in@20 {
-               compatible = "adi,adv7180";
-               reg = <0x20>;
-               remote = <&vin1>;
-
-               port {
-                       adv7180: endpoint {
-                               bus-width = <8>;
-                               remote-endpoint = <&vin1ep0>;
-                       };
-               };
-       };
-
-       cec_clock: cec-clock {
-               compatible = "fixed-clock";
-               #clock-cells = <0>;
-               clock-frequency = <12000000>;
-       };
-
-       hdmi@39 {
-               compatible = "adi,adv7511w";
-               reg = <0x39>;
-               interrupt-parent = <&gpio1>;
-               interrupts = <15 IRQ_TYPE_LEVEL_LOW>;
-               clocks = <&cec_clock>;
-               clock-names = "cec";
-
-               adi,input-depth = <8>;
-               adi,input-colorspace = "rgb";
-               adi,input-clock = "1x";
-               adi,input-style = <1>;
-               adi,input-justification = "evenly";
-
-               ports {
-                       #address-cells = <1>;
-                       #size-cells = <0>;
-
-                       port@0 {
-                               reg = <0>;
-                               adv7511_in: endpoint {
-                                       remote-endpoint = <&du_out_lvds0>;
-                               };
-                       };
-
-                       port@1 {
-                               reg = <1>;
-                               adv7511_out: endpoint {
-                                       remote-endpoint = <&hdmi_con_out>;
-                               };
-                       };
-               };
-       };
-
-       hdmi-in@4c {
-               compatible = "adi,adv7612";
-               reg = <0x4c>;
-               interrupt-parent = <&gpio1>;
-               interrupts = <20 IRQ_TYPE_LEVEL_LOW>;
-               default-input = <0>;
-
-               ports {
-                       #address-cells = <1>;
-                       #size-cells = <0>;
-
-                       port@0 {
-                               reg = <0>;
-                               adv7612_in: endpoint {
-                                       remote-endpoint = <&hdmi_con_in>;
-                               };
-                       };
+&iic2  {
+       pinctrl-0 = <&iic2_pins>;
+       pinctrl-names = "i2c-hdmi";
 
-                       port@2 {
-                               reg = <2>;
-                               adv7612_out: endpoint {
-                                       remote-endpoint = <&vin0ep2>;
-                               };
-                       };
-               };
-       };
+       clock-frequency = <100000>;
 };
 
 &iic3 {