linux-kernel - Re: [PATCH v3 04/10] gpio: dwapb: Add max GPIOs macro

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Message-ID: <20200730154219.GS3703480@smile.fi.intel.com>
Date:   Thu, 30 Jul 2020 18:42:19 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Serge Semin <Sergey.Semin@...kalelectronics.ru>
Cc:     Hoan Tran <hoan@...amperecomputing.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Serge Semin <fancer.lancer@...il.com>,
        Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
        Pavel Parkhomenko <Pavel.Parkhomenko@...kalelectronics.ru>,
        Rob Herring <robh+dt@...nel.org>, linux-gpio@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 04/10] gpio: dwapb: Add max GPIOs macro

On Thu, Jul 30, 2020 at 06:28:01PM +0300, Serge Semin wrote:
> Add a new macro DWAPB_MAX_GPIOS which defines the maximum possible number
> of GPIO lines corresponding to the maximum DW APB GPIO controller port
> width. Use the new macro instead of number literal 32 where it's
> applicable.

Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>

> Suggested-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> Signed-off-by: Serge Semin <Sergey.Semin@...kalelectronics.ru>
> ---
>  drivers/gpio/gpio-dwapb.c                | 8 ++++----
>  include/linux/platform_data/gpio-dwapb.h | 4 +++-
>  2 files changed, 7 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/gpio/gpio-dwapb.c b/drivers/gpio/gpio-dwapb.c
> index 3081213247d8..f34001152850 100644
> --- a/drivers/gpio/gpio-dwapb.c
> +++ b/drivers/gpio/gpio-dwapb.c
> @@ -162,7 +162,7 @@ static struct dwapb_gpio_port *dwapb_offs_to_port(struct dwapb_gpio *gpio, unsig
>  
>  	for (i = 0; i < gpio->nr_ports; i++) {
>  		port = &gpio->ports[i];
> -		if (port->idx == offs / 32)
> +		if (port->idx == offs / DWAPB_MAX_GPIOS)
>  			return port;
>  	}
>  
> @@ -182,7 +182,7 @@ static void dwapb_toggle_trigger(struct dwapb_gpio *gpio, unsigned int offs)
>  
>  	pol = dwapb_read(gpio, GPIO_INT_POLARITY);
>  	/* Just read the current value right out of the data register */
> -	val = gc->get(gc, offs % 32);
> +	val = gc->get(gc, offs % DWAPB_MAX_GPIOS);
>  	if (val)
>  		pol &= ~BIT(offs);
>  	else
> @@ -197,7 +197,7 @@ static u32 dwapb_do_irq(struct dwapb_gpio *gpio)
>  	irq_hw_number_t hwirq;
>  
>  	irq_status = dwapb_read(gpio, GPIO_INTSTATUS);
> -	for_each_set_bit(hwirq, &irq_status, 32) {
> +	for_each_set_bit(hwirq, &irq_status, DWAPB_MAX_GPIOS) {
>  		int gpio_irq = irq_find_mapping(gpio->domain, hwirq);
>  		u32 irq_type = irq_get_trigger_type(gpio_irq);
>  
> @@ -599,7 +599,7 @@ static struct dwapb_platform_data *dwapb_gpio_get_pdata(struct device *dev)
>  			dev_info(dev,
>  				 "failed to get number of gpios for port%d\n",
>  				 i);
> -			pp->ngpio = 32;
> +			pp->ngpio = DWAPB_MAX_GPIOS;
>  		}
>  
>  		pp->irq_shared	= false;
> diff --git a/include/linux/platform_data/gpio-dwapb.h b/include/linux/platform_data/gpio-dwapb.h
> index ff1be737bad6..0aa5c6720259 100644
> --- a/include/linux/platform_data/gpio-dwapb.h
> +++ b/include/linux/platform_data/gpio-dwapb.h
> @@ -6,12 +6,14 @@
>  #ifndef GPIO_DW_APB_H
>  #define GPIO_DW_APB_H
>  
> +#define DWAPB_MAX_GPIOS		32
> +
>  struct dwapb_port_property {
>  	struct fwnode_handle *fwnode;
>  	unsigned int	idx;
>  	unsigned int	ngpio;
>  	unsigned int	gpio_base;
> -	int		irq[32];
> +	int		irq[DWAPB_MAX_GPIOS];
>  	bool		irq_shared;
>  };
>  
> -- 
> 2.27.0
> 

-- 
With Best Regards,
Andy Shevchenko