linux-kernel - Re: [PATCH v1 1/2] iio: adc: ti-adc128s052: Switch to use spi_get_device_match

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Date:   Fri, 23 Dec 2022 15:22:42 +0000
From:   Jonathan Cameron <jic23@...nel.org>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
        Lars-Peter Clausen <lars@...afoo.de>
Subject: Re: [PATCH v1 1/2] iio: adc: ti-adc128s052: Switch to use
 spi_get_device_match_data()

On Wed, 14 Dec 2022 13:49:43 +0200
Andy Shevchenko <andriy.shevchenko@...ux.intel.com> wrote:

> The spi_get_device_match_data() helps to get driver data from the
> firmware node or SPI ID table. Use it instead of open coding.
> 
> While at it, switch ID tables to provide an acrual pointers to
> the configuration data.
> 
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> ---
> 
> Requires aea672d054a2 ("spi: Introduce spi_get_device_match_data()
> helper") which is part of upstream as of today.

I rebased to get that (will rebase again on rc1).

Applied to the togreg branch of iio.git and pushed out as testing
to keep 0-day busy over my holidays.

Jonathan

> 
>  drivers/iio/adc/ti-adc128s052.c | 39 +++++++++++++++------------------
>  1 file changed, 18 insertions(+), 21 deletions(-)
> 
> diff --git a/drivers/iio/adc/ti-adc128s052.c b/drivers/iio/adc/ti-adc128s052.c
> index b3d5b9b7255b..9dfc625100b6 100644
> --- a/drivers/iio/adc/ti-adc128s052.c
> +++ b/drivers/iio/adc/ti-adc128s052.c
> @@ -139,16 +139,11 @@ static void adc128_disable_regulator(void *reg)
>  
>  static int adc128_probe(struct spi_device *spi)
>  {
> +	const struct adc128_configuration *config;
>  	struct iio_dev *indio_dev;
> -	unsigned int config;
>  	struct adc128 *adc;
>  	int ret;
>  
> -	if (dev_fwnode(&spi->dev))
> -		config = (unsigned long) device_get_match_data(&spi->dev);
> -	else
> -		config = spi_get_device_id(spi)->driver_data;
> -
>  	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*adc));
>  	if (!indio_dev)
>  		return -ENOMEM;
> @@ -160,6 +155,8 @@ static int adc128_probe(struct spi_device *spi)
>  	indio_dev->modes = INDIO_DIRECT_MODE;
>  	indio_dev->info = &adc128_info;
>  
> +	config = spi_get_device_match_data(&spi->dev);
> +
>  	indio_dev->channels = adc128_config[config].channels;
>  	indio_dev->num_channels = adc128_config[config].num_channels;
>  
> @@ -181,32 +178,32 @@ static int adc128_probe(struct spi_device *spi)
>  }
>  
>  static const struct of_device_id adc128_of_match[] = {
> -	{ .compatible = "ti,adc128s052", .data = (void*)0L, },
> -	{ .compatible = "ti,adc122s021", .data = (void*)1L, },
> -	{ .compatible = "ti,adc122s051", .data = (void*)1L, },
> -	{ .compatible = "ti,adc122s101", .data = (void*)1L, },
> -	{ .compatible = "ti,adc124s021", .data = (void*)2L, },
> -	{ .compatible = "ti,adc124s051", .data = (void*)2L, },
> -	{ .compatible = "ti,adc124s101", .data = (void*)2L, },
> +	{ .compatible = "ti,adc128s052", .data = &adc128_config[0] },
> +	{ .compatible = "ti,adc122s021", .data = &adc128_config[1] },
> +	{ .compatible = "ti,adc122s051", .data = &adc128_config[1] },
> +	{ .compatible = "ti,adc122s101", .data = &adc128_config[1] },
> +	{ .compatible = "ti,adc124s021", .data = &adc128_config[2] },
> +	{ .compatible = "ti,adc124s051", .data = &adc128_config[2] },
> +	{ .compatible = "ti,adc124s101", .data = &adc128_config[2] },
>  	{ /* sentinel */ },
>  };
>  MODULE_DEVICE_TABLE(of, adc128_of_match);
>  
>  static const struct spi_device_id adc128_id[] = {
> -	{ "adc128s052", 0 },	/* index into adc128_config */
> -	{ "adc122s021",	1 },
> -	{ "adc122s051",	1 },
> -	{ "adc122s101",	1 },
> -	{ "adc124s021", 2 },
> -	{ "adc124s051", 2 },
> -	{ "adc124s101", 2 },
> +	{ "adc128s052", (kernel_ulong_t)&adc128_config[0] },
> +	{ "adc122s021",	(kernel_ulong_t)&adc128_config[1] },
> +	{ "adc122s051",	(kernel_ulong_t)&adc128_config[1] },
> +	{ "adc122s101",	(kernel_ulong_t)&adc128_config[1] },
> +	{ "adc124s021", (kernel_ulong_t)&adc128_config[2] },
> +	{ "adc124s051", (kernel_ulong_t)&adc128_config[2] },
> +	{ "adc124s101", (kernel_ulong_t)&adc128_config[2] },
>  	{ }
>  };
>  MODULE_DEVICE_TABLE(spi, adc128_id);
>  
>  #ifdef CONFIG_ACPI
>  static const struct acpi_device_id adc128_acpi_match[] = {
> -	{ "AANT1280", 2 }, /* ADC124S021 compatible ACPI ID */
> +	{ "AANT1280", (kernel_ulong_t)&adc128_config[2] },
>  	{ }
>  };
>  MODULE_DEVICE_TABLE(acpi, adc128_acpi_match);