linux-kernel - Re: [PATCH v3 10/13] ARM: dts: rockchip: add saradc support for rv1108

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Date:   Mon, 14 Aug 2017 09:42:23 +0800
From:   Andy Yan <andy.yan@...k-chips.com>
To:     Heiko Stuebner <heiko@...ech.de>
Cc:     robh+dt@...nel.org, devicetree@...r.kernel.org,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        David Wu <david.wu@...k-chips.com>
Subject: Re: [PATCH v3 10/13] ARM: dts: rockchip: add saradc support for
 rv1108

Hi Heiko:


On 2017年08月13日 20:13, Heiko Stuebner wrote:
> Hi Andy,
>
> Am Freitag, 11. August 2017, 11:46:51 CEST schrieb Andy Yan:
>> Add saradc device tree node for rv1108 soc
>>
>> Signed-off-by: Andy Yan <andy.yan@...k-chips.com>
>>
>> +	adc: adc@...8c000 {
>> +		compatible = "rockchip,rv1108-saradc", "rockchip,rk3399-saradc";
>> +		reg = <0x1038c000 0x100>;
>> +		interrupts = <GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>;
>> +		#io-channel-cells = <1>;
>> +		io-channel-ranges;
> What do you need the io-channel-ranges for?
> I.e. according to the documenation it is meant for when the adc is also
> a "bus node" and has children that should inherit channels from it.
>
> In all saradc uses so far we only have separate nodes referencing the
> adc controller (like adc-keys etc), so this does not look like it is needed?

     Sorry, I just copied it from the downstream dts. After checked with 
David, he suggested that we could remove it.
>
>
> Heiko
>
>
>
>