[PATCH 5/5] lmp92001: mfd: doc: Add support LMP92001

[s . abhisit]

From: Abhisit Sangjan <s.abhisit@xxxxxxxxx>

TI LMP92001 Analog System Monitor and Controller

8-bit GPIOs.
12 DACs with 12-bit resolution.

The GPIOs and DACs are shared port function with Cy function pin to
take control the pin suddenly from external hardware.
DAC's referance voltage selectable for Internal/External.

16 + 1 ADCs with 12-bit resolution.

Built-in internal Temperature Sensor on channel 17.
Window Comparator Function is supported on channel 1-3 and 9-11 for
monitoring with interrupt signal (pending to implement for interrupt).
ADC's referance voltage selectable for Internal/External.

Signed-off-by: Abhisit Sangjan <s.abhisit@xxxxxxxxx>
---
 Documentation/ABI/testing/sysfs-bus-iio-lmp920001  | 65 ++++++++++++++++++++++
 .../devicetree/bindings/gpio/gpio-lmp92001.txt     | 22 ++++++++
 .../bindings/iio/adc/ti-lmp92001-adc.txt           | 20 +++++++
 .../bindings/iio/dac/ti-lmp92001-dac.txt           | 35 ++++++++++++
 4 files changed, 142 insertions(+)
 create mode 100644 Documentation/ABI/testing/sysfs-bus-iio-lmp920001
 create mode 100644 Documentation/devicetree/bindings/gpio/gpio-lmp92001.txt
 create mode 100644 Documentation/devicetree/bindings/iio/adc/ti-lmp92001-adc.txt
 create mode 100644 Documentation/devicetree/bindings/iio/dac/ti-lmp92001-dac.txt

diff --git a/Documentation/ABI/testing/sysfs-bus-iio-lmp920001 b/Documentation/ABI/testing/sysfs-bus-iio-lmp920001
new file mode 100644
index 000000000000..f0965e7d823f
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-bus-iio-lmp920001
@@ -0,0 +1,65 @@
+What:           /sys/bus/iio/devices/iio:deviceX/gang
+Date:           August 2016
+KernelVersion:  4.12
+Contact:        Abhisit Sangjan <s.abhisit@xxxxxxxxx>
+Description:
+                Controls the association of analog output channels OUTx with
+                asynchronous control inputs Cy for DAC.
+                Can be either:
+                - "0"
+                - "1"
+
+                        Cy to OUTx Assignment
+                ----------------------------------
+                | Cy | CDAC:GANG=0 | CDAC:GANG=1 |
+                ----------------------------------
+                | C1 | OUT[1:4]    | OUT[1:3]    |
+                ----------------------------------
+                | C2 | OUT[5:6]    | OUT[4:6]    |
+                ----------------------------------
+                | C3 | OUT[7:8]    | OUT[7:9]    |
+                ----------------------------------
+                | C4 | OUT[9:12]   | OUT[10:12]  |
+                ----------------------------------
+
+What:           /sys/bus/iio/devices/iio:deviceX/outx
+Date:           August 2016
+KernelVersion:  4.12
+Contact:        Abhisit Sangjan <s.abhisit@xxxxxxxxx>
+Description:
+                The pin output mode for DAC.
+                Can be either:
+                - "hiz" = High impedance state.
+                - "dac" = DAC output.
+                - "0" = Drive it to low.
+                - "1" = Drive it to high.
+
+What:           /sys/bus/iio/devices/iio:deviceX/vref
+Date:           August 2016
+KernelVersion:  4.12
+Contact:        Abhisit Sangjan <s.abhisit@xxxxxxxxx>
+Description:
+                This is voltage reference source for DACs.
+                Can be either:
+                - "external"
+                - "internal"
+
+What:           /sys/devices/.../iio:deviceX/en
+Date:           August 2016
+KernelVersion:  4.12
+Contact:        Abhisit Sangjan <s.abhisit@xxxxxxxxx>
+Description:
+                This is ADC Conversion Enable for each channel.
+                Can be either:
+                - "enable"
+                - "disable"
+
+What:           /sys/devices/.../iio:deviceX/vref
+Date:           August 2016
+KernelVersion:  4.12
+Contact:        Abhisit Sangjan <s.abhisit@xxxxxxxxx>
+Description:
+                This is voltage reference source for ADCs.
+                Can be either:
+                - "external"
+                - "internal"
diff --git a/Documentation/devicetree/bindings/gpio/gpio-lmp92001.txt b/Documentation/devicetree/bindings/gpio/gpio-lmp92001.txt
new file mode 100644
index 000000000000..f9a18c492145
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/gpio-lmp92001.txt
@@ -0,0 +1,22 @@
+* Texas Instruments' LMP92001 GPIOs
+
+Required properties:
+ - compatible: Must be set to "ti,lmp92001-gpio".
+ - reg: i2c chip address for the device.
+ - gpio-controller: Marks the device node as a gpio controller.
+ - #gpio-cells : Should be two.  The first cell is the pin number and the
+  second cell is used to specify the gpio polarity:
+        0 = Active high
+        1 = Active low
+
+Example:
+lmp92001@20 {
+        compatible = "ti,lmp92001";
+        reg = <0x20>;
+
+        gpio-controller {
+                compatible = "ti,lmp92001-gpio";
+                gpio-controller;
+                #gpio-cells = <2>;
+        };
+};
diff --git a/Documentation/devicetree/bindings/iio/adc/ti-lmp92001-adc.txt b/Documentation/devicetree/bindings/iio/adc/ti-lmp92001-adc.txt
new file mode 100644
index 000000000000..4565961bf511
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/ti-lmp92001-adc.txt
@@ -0,0 +1,20 @@
+* Texas Instruments' LMP92001 ADCs
+
+Required properties:
+ - compatible: Must be set to "ti,lmp92001-adc".
+ - reg: i2c chip address for the device.
+ - ti,lmp92001-adc-mask: bit mask for which channel is enable.
+        0 = Off
+        1 = On
+
+Example:
+lmp92001@20 {
+        compatible = "ti,lmp92001";
+        reg = <0x20>;
+
+        lmp92001-adc {
+                compatible = "ti,lmp92001-adc";
+                ti,lmp92001-adc-mode = "continuous";
+                ti,lmp92001-adc-mask = <0x00000079>;
+        };
+};
diff --git a/Documentation/devicetree/bindings/iio/dac/ti-lmp92001-dac.txt b/Documentation/devicetree/bindings/iio/dac/ti-lmp92001-dac.txt
new file mode 100644
index 000000000000..882db9ca92f5
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/dac/ti-lmp92001-dac.txt
@@ -0,0 +1,35 @@
+* Texas Instruments' LMP92001 DACs
+
+Required properties:
+ - compatible: Must be set to "ti,lmp92001-dac".
+ - reg: i2c chip address for the device.
+ - ti,lmp92001-dac-hiz: hi-impedance control,
+        1 = Forces all OUT[1:12] outputs to hi-z, 0 = normal
+ - ti,lmp92001-dac-outx:
+        Cy = 0, 1 = will force associated OUTx outputs to VDD
+        Cy = 0, 0 = will force associated OUTx outputs to GND
+ - ti,lmp92001-dac-gang: What group of Cy is governed to.
+        -----------------------------------------
+        |  Cy   | CDAC:GANG = 0 | CDAC:GANG = 1 |
+        -----------------------------------------
+        |  C1   |   OUT[1:4]    |    OUT[1:3]   |
+        -----------------------------------------
+        |  C2   |   OUT[5:6]    |    OUT[4:6]   |
+        -----------------------------------------
+        |  C3   |   OUT[7:8]    |    OUT[7:9]   |
+        -----------------------------------------
+        |  C4   |   OUT[9:12]   |    OUT[10:12] |
+        -----------------------------------------
+
+Example:
+lmp92001@20 {
+        compatible = "ti,lmp92001";
+        reg = <0x20>;
+
+        lmp92001-dac {
+                compatible = "ti,lmp92001-dac";
+                ti,lmp92001-dac-hiz  = /bits/ 8 <0>;
+                ti,lmp92001-dac-outx = /bits/ 8 <0>;
+                ti,lmp92001-dac-gang = /bits/ 8 <0>;
+        };
+};
-- 
2.13.0