netdev - Re: [PATCH v2 04/13] iio: imu: Replace all spi->chip_select and spi->cs

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Message-ID: <20230121165235.13da9db2@jic23-huawei>
Date:   Sat, 21 Jan 2023 16:52:35 +0000
From:   Jonathan Cameron <jic23@...nel.org>
To:     Amit Kumar Mahapatra <amit.kumar-mahapatra@....com>
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Subject: Re: [PATCH v2 04/13] iio: imu: Replace all spi->chip_select and
 spi->cs_gpiod references with function call

On Fri, 20 Jan 2023 00:23:33 +0530
Amit Kumar Mahapatra <amit.kumar-mahapatra@....com> wrote:

> Supporting multi-cs in spi drivers would require the chip_select & cs_gpiod
> members of struct spi_device to be an array. But changing the type of these
> members to array would break the spi driver functionality. To make the
> transition smoother introduced four new APIs to get/set the
> spi->chip_select & spi->cs_gpiod and replaced all spi->chip_select and
> spi->cs_gpiod references with get or set API calls.
> While adding multi-cs support in further patches the chip_select & cs_gpiod
> members of the spi_device structure would be converted to arrays & the
> "idx" parameter of the APIs would be used as array index i.e.,
> spi->chip_select[idx] & spi->cs_gpiod[idx] respectively.
> 
> Signed-off-by: Amit Kumar Mahapatra <amit.kumar-mahapatra@....com>

Acked-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>

> ---
>  drivers/iio/imu/adis16400.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/iio/imu/adis16400.c b/drivers/iio/imu/adis16400.c
> index c02fc35dceb4..3eda32e12a53 100644
> --- a/drivers/iio/imu/adis16400.c
> +++ b/drivers/iio/imu/adis16400.c
> @@ -466,7 +466,7 @@ static int adis16400_initial_setup(struct iio_dev *indio_dev)
>  
>  		dev_info(&indio_dev->dev, "%s: prod_id 0x%04x at CS%d (irq %d)\n",
>  			indio_dev->name, prod_id,
> -			st->adis.spi->chip_select, st->adis.spi->irq);
> +			spi_get_chipselect(st->adis.spi, 0), st->adis.spi->irq);
>  	}
>  	/* use high spi speed if possible */
>  	if (st->variant->flags & ADIS16400_HAS_SLOW_MODE) {