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Message-ID: <301b3c390b417c1268c0c1d3014d52f8b8660aba.camel@gmail.com>
Date: Fri, 27 Jun 2025 16:52:49 +0100
From: Nuno Sá <noname.nuno@...il.com>
To: Antoniu Miclaus <antoniu.miclaus@...log.com>, jic23@...nel.org,
robh@...nel.org, conor+dt@...nel.org, devicetree@...r.kernel.org,
linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] iio: adc: ad4851: add spi 3-wire support
On Thu, 2025-06-26 at 13:40 +0300, Antoniu Miclaus wrote:
> Add support for 3-wire configuration within the driver.
> By default 4-wire configuration is used.
>
> Signed-off-by: Antoniu Miclaus <antoniu.miclaus@...log.com>
> ---
Had to look twice :). Commit message could have been better by saying that reset
value is 3-wire. Anyways:
Reviewed-by: Nuno Sá <nuno.sa@...log.com>
> drivers/iio/adc/ad4851.c | 10 ++++++----
> 1 file changed, 6 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/iio/adc/ad4851.c b/drivers/iio/adc/ad4851.c
> index 31e1e02c0ce3..1ad77f2a4580 100644
> --- a/drivers/iio/adc/ad4851.c
> +++ b/drivers/iio/adc/ad4851.c
> @@ -444,10 +444,12 @@ static int ad4851_setup(struct ad4851_state *st)
> if (ret)
> return ret;
>
> - ret = regmap_write(st->regmap, AD4851_REG_INTERFACE_CONFIG_A,
> - AD4851_SDO_ENABLE);
> - if (ret)
> - return ret;
> + if (!(st->spi->mode & SPI_3WIRE)) {
> + ret = regmap_write(st->regmap, AD4851_REG_INTERFACE_CONFIG_A,
> + AD4851_SDO_ENABLE);
> + if (ret)
> + return ret;
> + }
>
> ret = regmap_read(st->regmap, AD4851_REG_PRODUCT_ID_L, &product_id);
> if (ret)
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