ARM: dts: aspeed: mtmitchell: Update ADC sensors for Mt.Mitchell DVT systems

Change to use I2C ADC controller (ltc2497) for Mt.Mitchell DVT and
later hardware.

Signed-off-by: Chanh Nguyen <chanh@os.amperecomputing.com>
Link: https://lore.kernel.org/r/20230620092537.20007-3-chanh@os.amperecomputing.com
Signed-off-by: Joel Stanley <joel@jms.id.au>

diff --git a/arch/arm/boot/dts/aspeed/aspeed-bmc-ampere-mtmitchell.dts b/arch/arm/boot/dts/aspeed/aspeed-bmc-ampere-mtmitchell.dts
index bb944ad..c122fc4 100644 (file)
--- a/arch/arm/boot/dts/aspeed/aspeed-bmc-ampere-mtmitchell.dts
+++ b/arch/arm/boot/dts/aspeed/aspeed-bmc-ampere-mtmitchell.dts
@@ -66,174 +66,192 @@
 
        adc0mux: adc0mux {
                compatible = "io-channel-mux";
-               io-channels = <&adc0 0>;
+               io-channels = <&adc_i2c_0 0>;
                #io-channel-cells = <1>;
                io-channel-names = "parent";
                mux-controls = <&gpioI5mux>;
+               settle-time-us = <10000>;
                channels = "s0", "s1";
        };
 
        adc1mux: adc1mux {
                compatible = "io-channel-mux";
-               io-channels = <&adc0 1>;
+               io-channels = <&adc_i2c_0 1>;
                #io-channel-cells = <1>;
                io-channel-names = "parent";
                mux-controls = <&gpioI5mux>;
+               settle-time-us = <10000>;
                channels = "s0", "s1";
        };
 
        adc2mux: adc2mux {
                compatible = "io-channel-mux";
-               io-channels = <&adc0 2>;
+               io-channels = <&adc_i2c_0 2>;
                #io-channel-cells = <1>;
                io-channel-names = "parent";
                mux-controls = <&gpioI5mux>;
+               settle-time-us = <10000>;
                channels = "s0", "s1";
        };
 
        adc3mux: adc3mux {
                compatible = "io-channel-mux";
-               io-channels = <&adc0 3>;
+               io-channels = <&adc_i2c_0 3>;
                #io-channel-cells = <1>;
                io-channel-names = "parent";
                mux-controls = <&gpioI5mux>;
+               settle-time-us = <10000>;
                channels = "s0", "s1";
        };
 
        adc4mux: adc4mux {
                compatible = "io-channel-mux";
-               io-channels = <&adc0 4>;
+               io-channels = <&adc_i2c_0 4>;
                #io-channel-cells = <1>;
                io-channel-names = "parent";
                mux-controls = <&gpioI5mux>;
+               settle-time-us = <10000>;
                channels = "s0", "s1";
        };
 
        adc5mux: adc5mux {
                compatible = "io-channel-mux";
-               io-channels = <&adc0 5>;
+               io-channels = <&adc_i2c_0 5>;
                #io-channel-cells = <1>;
                io-channel-names = "parent";
                mux-controls = <&gpioI5mux>;
+               settle-time-us = <10000>;
                channels = "s0", "s1";
        };
 
        adc6mux: adc6mux {
                compatible = "io-channel-mux";
-               io-channels = <&adc0 6>;
+               io-channels = <&adc_i2c_0 6>;
                #io-channel-cells = <1>;
                io-channel-names = "parent";
                mux-controls = <&gpioI5mux>;
+               settle-time-us = <10000>;
                channels = "s0", "s1";
        };
 
        adc7mux: adc7mux {
                compatible = "io-channel-mux";
-               io-channels = <&adc0 7>;
+               io-channels = <&adc_i2c_0 7>;
                #io-channel-cells = <1>;
                io-channel-names = "parent";
                mux-controls = <&gpioI5mux>;
+               settle-time-us = <10000>;
                channels = "s0", "s1";
        };
 
        adc8mux: adc8mux {
                compatible = "io-channel-mux";
-               io-channels = <&adc1 0>;
+               io-channels = <&adc_i2c_0 8>;
                #io-channel-cells = <1>;
                io-channel-names = "parent";
                mux-controls = <&gpioI5mux>;
+               settle-time-us = <10000>;
                channels = "s0", "s1";
        };
 
        adc9mux: adc9mux {
                compatible = "io-channel-mux";
-               io-channels = <&adc1 1>;
+               io-channels = <&adc_i2c_0 9>;
                #io-channel-cells = <1>;
                io-channel-names = "parent";
                mux-controls = <&gpioI5mux>;
+               settle-time-us = <10000>;
                channels = "s0", "s1";
        };
 
        adc10mux: adc10mux {
                compatible = "io-channel-mux";
-               io-channels = <&adc1 2>;
+               io-channels = <&adc_i2c_0 10>;
                #io-channel-cells = <1>;
                io-channel-names = "parent";
                mux-controls = <&gpioI5mux>;
+               settle-time-us = <10000>;
                channels = "s0", "s1";
        };
 
        adc11mux: adc11mux {
                compatible = "io-channel-mux";
-               io-channels = <&adc1 3>;
+               io-channels = <&adc_i2c_0 11>;
                #io-channel-cells = <1>;
                io-channel-names = "parent";
                mux-controls = <&gpioI5mux>;
+               settle-time-us = <10000>;
                channels = "s0", "s1";
        };
 
        adc12mux: adc12mux {
                compatible = "io-channel-mux";
-               io-channels = <&adc1 4>;
+               io-channels = <&adc_i2c_0 12>;
                #io-channel-cells = <1>;
                io-channel-names = "parent";
                mux-controls = <&gpioI5mux>;
+               settle-time-us = <10000>;
                channels = "s0", "s1";
        };
 
        adc13mux: adc13mux {
                compatible = "io-channel-mux";
-               io-channels = <&adc1 5>;
+               io-channels = <&adc_i2c_0 13>;
                #io-channel-cells = <1>;
                io-channel-names = "parent";
                mux-controls = <&gpioI5mux>;
+               settle-time-us = <10000>;
                channels = "s0", "s1";
        };
 
        adc14mux: adc14mux {
                compatible = "io-channel-mux";
-               io-channels = <&adc1 6>;
+               io-channels = <&adc_i2c_0 14>;
                #io-channel-cells = <1>;
                io-channel-names = "parent";
                mux-controls = <&gpioI5mux>;
+               settle-time-us = <10000>;
                channels = "s0", "s1";
        };
 
        adc15mux: adc15mux {
                compatible = "io-channel-mux";
-               io-channels = <&adc1 7>;
+               io-channels = <&adc_i2c_0 15>;
                #io-channel-cells = <1>;
                io-channel-names = "parent";
                mux-controls = <&gpioI5mux>;
+               settle-time-us = <10000>;
                channels = "s0", "s1";
        };
 
        iio-hwmon {
                compatible = "iio-hwmon";
-               io-channels = <&adc0mux 0>, <&adc0mux 1>,
-                       <&adc1mux 0>, <&adc1mux 1>,
-                       <&adc2mux 0>, <&adc2mux 1>,
-                       <&adc3mux 0>, <&adc3mux 1>,
-                       <&adc4mux 0>, <&adc4mux 1>,
-                       <&adc5mux 0>, <&adc5mux 1>,
-                       <&adc6mux 0>, <&adc6mux 1>,
-                       <&adc7mux 0>, <&adc7mux 1>,
-                       <&adc8mux 0>, <&adc8mux 1>,
-                       <&adc9mux 0>, <&adc9mux 1>,
-                       <&adc10mux 0>, <&adc10mux 1>,
-                       <&adc11mux 0>, <&adc11mux 1>,
-                       <&adc12mux 0>, <&adc12mux 1>,
-                       <&adc13mux 0>, <&adc13mux 1>,
-                       <&adc14mux 0>, <&adc14mux 1>,
-                       <&adc15mux 0>, <&adc15mux 1>,
-                       <&adc_i2c 0>, <&adc_i2c 1>,
-                       <&adc_i2c 2>, <&adc_i2c 3>,
-                       <&adc_i2c 4>, <&adc_i2c 5>,
-                       <&adc_i2c 6>, <&adc_i2c 7>,
-                       <&adc_i2c 8>, <&adc_i2c 9>,
-                       <&adc_i2c 10>, <&adc_i2c 11>,
-                       <&adc_i2c 12>, <&adc_i2c 13>,
-                       <&adc_i2c 14>, <&adc_i2c 15>;
+               io-channels =   <&adc0mux 0>, <&adc0mux 1>,
+                               <&adc1mux 0>, <&adc1mux 1>,
+                               <&adc2mux 0>, <&adc2mux 1>,
+                               <&adc3mux 0>, <&adc3mux 1>,
+                               <&adc4mux 0>, <&adc4mux 1>,
+                               <&adc5mux 0>, <&adc5mux 1>,
+                               <&adc6mux 0>, <&adc6mux 1>,
+                               <&adc7mux 0>, <&adc7mux 1>,
+                               <&adc8mux 0>, <&adc8mux 1>,
+                               <&adc9mux 0>, <&adc9mux 1>,
+                               <&adc10mux 0>, <&adc10mux 1>,
+                               <&adc11mux 0>, <&adc11mux 1>,
+                               <&adc12mux 0>, <&adc12mux 1>,
+                               <&adc13mux 0>, <&adc13mux 1>,
+                               <&adc14mux 0>, <&adc14mux 1>,
+                               <&adc15mux 0>, <&adc15mux 1>,
+                               <&adc_i2c_1 0>, <&adc_i2c_1 1>,
+                               <&adc_i2c_1 2>, <&adc_i2c_1 3>,
+                               <&adc_i2c_1 4>, <&adc_i2c_1 5>,
+                               <&adc_i2c_1 6>, <&adc_i2c_1 7>,
+                               <&adc_i2c_1 8>, <&adc_i2c_1 9>,
+                               <&adc_i2c_1 10>, <&adc_i2c_1 11>,
+                               <&adc_i2c_1 12>, <&adc_i2c_1 13>,
+                               <&adc_i2c_1 14>, <&adc_i2c_1 15>,
+                               <&adc0 0>, <&adc0 1>,
+                               <&adc0 2>;
        };
 };
 
@@ -354,7 +372,14 @@
 &i2c4 {
        status = "okay";
 
-       adc_i2c: adc@16 {
+       adc_i2c_0: adc@14 {
+               compatible = "lltc,ltc2497";
+               reg = <0x14>;
+               vref-supply = <&voltage_mon_reg>;
+               #io-channel-cells = <1>;
+        };
+
+       adc_i2c_1: adc@16 {
                compatible = "lltc,ltc2497";
                reg = <0x16>;
                vref-supply = <&voltage_mon_reg>;