linux-kernel - Re: [PATCH 4/4] dt-bindings: input: Add documentation for gp2a sensor

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Date:   Sat, 26 Jan 2019 03:14:14 +0000
From:   Jonathan Bakker <xc-racer2@...e.ca>
To:     Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Paweł Chmiel <pawel.mikolaj.chmiel@...il.com>
CC:     "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "mchehab+samsung@...nel.org" <mchehab+samsung@...nel.org>,
        "colyli@...e.de" <colyli@...e.de>,
        "ckeepax@...nsource.wolfsonmicro.com" 
        <ckeepax@...nsource.wolfsonmicro.com>,
        "andrew.smirnov@...il.com" <andrew.smirnov@...il.com>,
        "arnd@...db.de" <arnd@...db.de>,
        "xiaotong.lu@...eadtrum.com" <xiaotong.lu@...eadtrum.com>,
        "linux-input@...r.kernel.org" <linux-input@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: Re: [PATCH 4/4] dt-bindings: input: Add documentation for gp2a sensor

Hi Dmitry,

Thanks for your review of the patches.

Considering that the light sensor part should be in IIO, should the entire driver be rewritten as an IIO driver?  There's already the driver for gp2ap020a00f there which is presumably the gp2ap002a00f's successor and does the same functions.

On 2019-01-25 5:32 p.m., Dmitry Torokhov wrote:
> On Fri, Jan 25, 2019 at 06:50:45PM +0100, Paweł Chmiel wrote:
>> From: Jonathan Bakker <xc-racer2@...e.ca>
>>
>> This commit adds documentation for Sharp GP2AP002A00F.
>> It's Proximity/Opto Sensor connected over i2c.
>>
>> Signed-off-by: Jonathan Bakker <xc-racer2@...e.ca>
>> Signed-off-by: Paweł Chmiel <pawel.mikolaj.chmiel@...il.com>
>> ---
>>  .../bindings/input/sharp,gp2ap002a00f.txt     | 29 +++++++++++++++++++
>>  1 file changed, 29 insertions(+)
>>  create mode 100644 Documentation/devicetree/bindings/input/sharp,gp2ap002a00f.txt
>>
>> diff --git a/Documentation/devicetree/bindings/input/sharp,gp2ap002a00f.txt b/Documentation/devicetree/bindings/input/sharp,gp2ap002a00f.txt
>> new file mode 100644
>> index 000000000000..c524eb7d3d60
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/input/sharp,gp2ap002a00f.txt
>> @@ -0,0 +1,29 @@
>> +* Sharp GP2AP002A00F I2C Proximity/Opto Sensor
>> +
>> +Required properties:
>> +- compatible : Should be "sharp,gp2ap002a00f"
>> +- reg : The I2C address of the sensor
>> +- vout-gpio : The gpio connected to the vout pin
> 
> Do you know what it is for?
> 
It's the control of the main power supply to the chip.
>> +- interrupt-parent : should be the phandle for the interrupt controller
>> +- interrupts : Interrupt mapping for GPIO IRQ, it should by configured with
>> +		flags IRQ_TYPE_EDGE_BOTH
>> +
>> +Optional properties:
>> +- wakeup : If the device is capable of waking up the system
>> +- io-channels : Phandle to an ADC channel connected to the light sensor
>> +- io-channel-names = "light";
>> +- poll-interval : Poll interval time in milliseconds, default 500ms
>> +- light-adc-max : Maximum light value reported, default 4096
>> +- light-adc-fuzz : Fuzz value for reported light value, default 80
>> +
>> +Example:
>> +
>> +gp2a@44 {
>> +	compatible = "sharp,gp2ap002a00f";
>> +	reg = <0x44>;
>> +	vout-gpio = <&gph0 2 GPIO_ACTIVE_HIGH>;
>> +	interrupt-parent = <&gph0>;
>> +	interrupts = <2 IRQ_TYPE_EDGE_BOTH>;
>> +	io-channels = <&adc 9>;
>> +	io-channel-names = "light";
>> +};
>> -- 
>> 2.17.1
>>
> 
Thanks,
Jonathan