ARM: dts: lager: use demuxer for IIC3/I2C3

Create a separate bus for da9063 PMIC and da9210 regulator
related I2C slaves.

Based on similar work for HDMI by Wolfram Sang.

Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
[wsa: rebased, corrected chip name in commit msg, updated aliases]
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 9f511d4..20c1b4f 100644 (file)
--- a/arch/arm/boot/dts/r8a7790-lager.dts
+++ b/arch/arm/boot/dts/r8a7790-lager.dts
@@ -55,6 +55,7 @@
                i2c10 = &i2cexio0;
                i2c11 = &i2cexio1;
                i2c12 = &i2chdmi;
+               i2c13 = &i2cpwr;
        };
 
        chosen {
@@ -418,6 +419,46 @@
                        };
                };
        };
+
+       /*
+        * IIC3 and I2C3 may be switched using pinmux.
+        * IIC3/I2C3 does not appear to support fallback to GPIO.
+        */
+       i2cpwr: i2c-13 {
+               compatible = "i2c-demux-pinctrl";
+               i2c-parent = <&iic3>, <&i2c3>;
+               i2c-bus-name = "i2c-pwr";
+               #address-cells = <1>;
+               #size-cells = <0>;
+
+               pmic@58 {
+                       compatible = "dlg,da9063";
+                       reg = <0x58>;
+                       interrupt-parent = <&irqc0>;
+                       interrupts = <2 IRQ_TYPE_LEVEL_LOW>;
+                       interrupt-controller;
+
+                       rtc {
+                               compatible = "dlg,da9063-rtc";
+                       };
+
+                       wdt {
+                               compatible = "dlg,da9063-watchdog";
+                       };
+               };
+
+               vdd_dvfs: regulator@68 {
+                       compatible = "dlg,da9210";
+                       reg = <0x68>;
+                       interrupt-parent = <&irqc0>;
+                       interrupts = <2 IRQ_TYPE_LEVEL_LOW>;
+
+                       regulator-min-microvolt = <1000000>;
+                       regulator-max-microvolt = <1000000>;
+                       regulator-boot-on;
+                       regulator-always-on;
+               };
+       };
 };
 
 &du {
@@ -557,6 +598,11 @@
                function = "iic2";
        };
 
+       i2c3_pins: i2c3 {
+               groups = "i2c3";
+               function = "i2c3";
+       };
+
        iic3_pins: iic3 {
                groups = "iic3";
                function = "iic3";
@@ -772,38 +818,14 @@
        clock-frequency = <100000>;
 };
 
-&iic3 {
-       pinctrl-names = "default";
-       pinctrl-0 = <&iic3_pins>;
-       status = "okay";
-
-       pmic@58 {
-               compatible = "dlg,da9063";
-               reg = <0x58>;
-               interrupt-parent = <&irqc0>;
-               interrupts = <2 IRQ_TYPE_LEVEL_LOW>;
-               interrupt-controller;
-
-               rtc {
-                       compatible = "dlg,da9063-rtc";
-               };
-
-               wdt {
-                       compatible = "dlg,da9063-watchdog";
-               };
-       };
-
-       vdd_dvfs: regulator@68 {
-               compatible = "dlg,da9210";
-               reg = <0x68>;
-               interrupt-parent = <&irqc0>;
-               interrupts = <2 IRQ_TYPE_LEVEL_LOW>;
+&i2c3  {
+       pinctrl-0 = <&i2c3_pins>;
+       pinctrl-names = "i2c-pwr";
+};
 
-               regulator-min-microvolt = <1000000>;
-               regulator-max-microvolt = <1000000>;
-               regulator-boot-on;
-               regulator-always-on;
-       };
+&iic3  {
+       pinctrl-0 = <&iic3_pins>;
+       pinctrl-names = "i2c-pwr";
 };
 
 &pci0 {