linux-kernel - Re: [PATCH 6/9] iio: adc: at91_adc: remove forward declaration

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Message-ID: <20201114170908.234f0141@archlinux>
Date:   Sat, 14 Nov 2020 17:09:08 +0000
From:   Jonathan Cameron <jic23@...nel.org>
To:     Alexandre Belloni <alexandre.belloni@...tlin.com>
Cc:     Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Ludovic Desroches <ludovic.desroches@...rochip.com>,
        linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 6/9] iio: adc: at91_adc: remove forward declaration

On Fri, 13 Nov 2020 22:26:47 +0100
Alexandre Belloni <alexandre.belloni@...tlin.com> wrote:

> Remove the forward declaration of at91_adc_dt_ids by using
> device_get_match_data. Also add const were possible since it is not
> discarded by the cast anymore.
> 
> Signed-off-by: Alexandre Belloni <alexandre.belloni@...tlin.com>

Ignore comment on previous patch ;)

Jonathan

> ---
>  drivers/iio/adc/at91_adc.c | 11 ++++-------
>  1 file changed, 4 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c
> index 9f05eb722f5e..76aeebce6f4d 100644
> --- a/drivers/iio/adc/at91_adc.c
> +++ b/drivers/iio/adc/at91_adc.c
> @@ -224,7 +224,6 @@ struct at91_adc_state {
>  	struct mutex		lock;
>  	u8			num_channels;
>  	void __iomem		*reg_base;
> -	struct at91_adc_reg_desc *registers;
>  	u32			startup_time;
>  	u8			sample_hold_time;
>  	bool			sleep_mode;
> @@ -233,7 +232,8 @@ struct at91_adc_state {
>  	u32			vref_mv;
>  	u32			res;		/* resolution used for convertions */
>  	wait_queue_head_t	wq_data_avail;
> -	struct at91_adc_caps	*caps;
> +	const struct at91_adc_caps *caps;
> +	const struct at91_adc_reg_desc *registers;
>  
>  	/*
>  	 * Following ADC channels are shared by touchscreen:
> @@ -569,7 +569,7 @@ static int at91_adc_configure_trigger(struct iio_trigger *trig, bool state)
>  {
>  	struct iio_dev *idev = iio_trigger_get_drvdata(trig);
>  	struct at91_adc_state *st = iio_priv(idev);
> -	struct at91_adc_reg_desc *reg = st->registers;
> +	const struct at91_adc_reg_desc *reg = st->registers;
>  	u32 status = at91_adc_readl(st, reg->trigger_register);
>  	int value;
>  	u8 bit;
> @@ -796,8 +796,6 @@ static u32 calc_startup_ticks_9x5(u32 startup_time, u32 adc_clk_khz)
>  	return ticks;
>  }
>  
> -static const struct of_device_id at91_adc_dt_ids[];
> -
>  static int at91_adc_probe_dt_ts(struct device_node *node,
>  	struct at91_adc_state *st, struct device *dev)
>  {
> @@ -1011,8 +1009,7 @@ static int at91_adc_probe(struct platform_device *pdev)
>  
>  	st = iio_priv(idev);
>  
> -	st->caps = (struct at91_adc_caps *)
> -		of_match_device(at91_adc_dt_ids, &pdev->dev)->data;
> +	st->caps = device_get_match_data(&pdev->dev);
>  
>  	st->use_external = of_property_read_bool(node, "atmel,adc-use-external-triggers");
>