linux-kernel - Re: [PATCH v5 5/5] arm64: dts: exynos: Add tm2 touchkey node

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Date:   Sun, 8 Jan 2017 14:14:20 +0900
From:   Chanwoo Choi <cwchoi00@...il.com>
To:     Andi Shyti <andi@...zian.org>
Cc:     Andi Shyti <andi.shyti@...sung.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Kukjin Kim <kgene@...nel.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Javier Martinez Canillas <javier@....samsung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Beomho Seo <beomho.seo@...sung.com>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-input@...r.kernel.org,
        devicetree <devicetree@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-samsung-soc <linux-samsung-soc@...r.kernel.org>,
        Jaechul Lee <jcsing.lee@...sung.com>,
        Jaechul Lee <galaxyra@...il.com>
Subject: Re: [PATCH v5 5/5] arm64: dts: exynos: Add tm2 touchkey node

Hi Andi,

2017-01-07 21:40 GMT+09:00 Andi Shyti <andi@...zian.org>:
> Hi Chanwoo,
>
>> >>> +       touchkey@20 {
>> >>> +               compatible = "samsung,tm2-touchkey";
>> >>> +               reg = <0x20>;
>> >>> +               interrupt-parent = <&gpa3>;
>> >>> +               interrupts = <2 IRQ_TYPE_EDGE_FALLING>;
>> >>> +               vcc-supply = <&ldo32_reg>;
>> >>> +               vdd-supply = <&ldo33_reg>;
>> >>> +       };
>> >>> +};
>> >>> +
>> >>>  &ldo31_reg {
>> >>>         regulator-name = "TSP_VDD_1.85V_AP";
>> >>>         regulator-min-microvolt = <1850000>;
>>
>> I repiled the touchkey driver against compatible name.
>> Usually, when developing the device driver, we use the specific h/w name
>> but in this patch, the touckey dt node uses the h/w board name instead of
>> original touckhey name.
>
> this should be a device specifically done for the tm2 and we are
> not sure who is the manufacturer of the device. In order to not

As I knew, this touchkey was made by Cypress semiconductor.
But, for more correct information, you may try to find it.

> assign the device to the wrong manufacturer, we preferred calling
> it Samsung as it is in a Samsung device.

As you mentioned, Samsung made not this touchkey device. It is
certainly wrong manufacturer. I have not seen to use the h/w board
name as the peripheral device name.

I don't prefer to use the inaccurate manufacturer and device name.

-- 
Best Regards,
Chanwoo Choi