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Date: Thu, 31 Aug 2017 01:25:28 +0700
From: s.abhisit@...il.com
To: linus.walleij@...aro.org
Cc: robh@...nel.org, lee.jones@...aro.org, Jonathan.Cameron@...wei.com,
pmeerw@...erw.net, jacopo@...ndi.org, linux-kernel@...r.kernel.org,
knaack.h@....de, lars@...afoo.de, fabrice.gasnier@...com,
akinobu.mita@...il.com, marek.vasut+renesas@...il.com,
jacopo+renesas@...ndi.org, mike.looijmans@...ic.nl,
peda@...ntia.se, jeff.dagenais@...il.com,
linux-iio@...r.kernel.org, linux-gpio@...r.kernel.org,
mark.rutland@....com, devicetree@...r.kernel.org, lukas@...ner.de,
adi.reus@...il.com, Abhisit Sangjan <s.abhisit@...il.com>
Subject: [PATCH 5/5] lmp92001: mfd: doc: Add support LMP92001
From: Abhisit Sangjan <s.abhisit@...il.com>
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@...il.com>
---
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@...il.com>
+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@...il.com>
+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@...il.com>
+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@...il.com>
+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@...il.com>
+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
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