linux-kernel - Re: [PATCH 6/9] iio: adc: adi-axi-adc: Add support for AD7606 register writing

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Message-ID: <20241126184307.0a675530@jic23-huawei>
Date: Tue, 26 Nov 2024 18:43:07 +0000
From: Jonathan Cameron <jic23@...nel.org>
To: Guillaume Stols <gstols@...libre.com>
Cc: Lars-Peter Clausen <lars@...afoo.de>, Michael Hennerich
 <Michael.Hennerich@...log.com>, Nuno Sa <nuno.sa@...log.com>, Rob Herring
 <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Jonathan Cameron <Jonathan.Cameron@...wei.com>,
 linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
 devicetree@...r.kernel.org, dlechner@...libre.com, jstephan@...libre.com,
 aardelean@...libre.com, adureghello@...libre.com
Subject: Re: [PATCH 6/9] iio: adc: adi-axi-adc: Add support for AD7606
 register writing

On Thu, 21 Nov 2024 10:18:28 +0000
Guillaume Stols <gstols@...libre.com> wrote:

> Since we must access the bus parallel bus using a custom procedure,
> let's add a specialized compatible, and define specialized callbacks for
> writing the registers using the parallel interface.
> 
> Signed-off-by: Guillaume Stols <gstols@...libre.com>
Trivial comments inline.

Thanks,

J
> +
> +static int ad7606_bi_reg_write(struct iio_backend *back, u32 reg, u32 val)
> +{
> +	struct adi_axi_adc_state *st = iio_backend_get_priv(back);
> +	u32 buf;
> +
> +	guard(mutex)(&st->lock);
> +
> +	/* Read any register to switch to register mode */
> +	buf = 0xaf00;
> +	axi_adc_raw_write(back, &buf, 4);

sizeof(buf) for these.


>  static void axi_adc_free_buffer(struct iio_backend *back,
>  				struct iio_buffer *buffer)
>  {
> @@ -487,9 +573,22 @@ static const struct axi_adc_info adc_generic = {
>  	.backend_info = &adi_axi_adc_generic,
>  };
>  
> +static const struct ad7606_platform_data ad7606_pdata = {
> +		.bus_reg_read = ad7606_bi_reg_read,
> +		.bus_reg_write = ad7606_bi_reg_write,

One less tab on indent.

> +};