linux-kernel - Re: [PATCH 1/5] iio:adc:at91_adc8xx: introduce new atmel adc driver

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Date:	Wed, 23 Dec 2015 11:27:01 +0100
From:	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
To:	Ludovic Desroches <ludovic.desroches@...el.com>
Cc:	jic23@...nel.org, nicolas.ferre@...el.com,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-iio@...r.kernel.org, plagnioj@...osoft.com,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 1/5] iio:adc:at91_adc8xx: introduce new atmel adc driver

On 21/12/2015 at 10:24:08 +0100, Ludovic Desroches wrote :
> +++ b/Documentation/devicetree/bindings/iio/adc/at91_adc8xx.txt
> @@ -0,0 +1,27 @@
> +* AT91 SAMA5D2 Analog to Digital Converter (ADC)
> +
> +Required properties:
> +  - compatible: Should be "atmel,sama5d2-adc".
> +  - reg: Should contain ADC registers location and length.
> +  - interrupts: Should contain the IRQ line for the ADC.
> +  - clocks: phandles to clocks.
> +  - clock-names: tuple listing clock names.
> +      Required elements: "adc_clk", "adc_op_clk". "adc_clk" is the peripheral
> +      clock, "adc_clk" is the sampling clock.

I think we should not have adc_op_clk but rather have a property like
vf610 has fsl,adck-max-frequency.
Even better, would be the ability to change it with
/sys/bus/iio/devices/iio:deviceX/sampling_frequency


-- 
Alexandre Belloni, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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