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Date: Wed, 27 Jan 2021 21:48:31 +0100
From: Alexander Sverdlin <alexander.sverdlin@...il.com>
To: Nikita Shubin <nikita.shubin@...uefel.me>
Cc: Andy Shevchenko <andy.shevchenko@...il.com>,
Linus Walleij <linus.walleij@...aro.org>,
Bartosz Golaszewski <bgolaszewski@...libre.com>,
linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 7/9] gpio: ep93xx: separate IRQ's setup
Hello Nikita,
On Wed, 2021-01-27 at 13:46 +0300, Nikita Shubin wrote:
> Separate IRQ's setup for port A,B,F.
Somehow I don't feel that moving "FIXME" code around makes much
sense. Maybe the anticipated conversion to hierarhical IRQ chip
will result in a cleanup automatically?
> Signed-off-by: Nikita Shubin <nikita.shubin@...uefel.me>
> ---
> drivers/gpio/gpio-ep93xx.c | 104 +++++++++++++++++++++++------------
> --
> 1 file changed, 64 insertions(+), 40 deletions(-)
>
> diff --git a/drivers/gpio/gpio-ep93xx.c b/drivers/gpio/gpio-ep93xx.c
> index e4270b4e5f26..b212c007240e 100644
> --- a/drivers/gpio/gpio-ep93xx.c
> +++ b/drivers/gpio/gpio-ep93xx.c
> @@ -353,6 +353,64 @@ static void ep93xx_init_irq_chips(struct
> ep93xx_gpio *epg)
> }
> }
>
> +static int ep93xx_gpio_add_ab_irq_chip(struct platform_device *pdev,
> + struct gpio_irq_chip *girq,
> + unsigned int irq_base)
> +{
> + struct device *dev = &pdev->dev;
> + int ab_parent_irq = platform_get_irq(pdev, 0);
> +
> + girq->parent_handler = ep93xx_gpio_ab_irq_handler;
> + girq->num_parents = 1;
> + girq->parents = devm_kcalloc(dev, girq->num_parents,
> + sizeof(*girq->parents),
> + GFP_KERNEL);
> + if (!girq->parents)
> + return -ENOMEM;
> + girq->default_type = IRQ_TYPE_NONE;
> + girq->handler = handle_level_irq;
> + girq->parents[0] = ab_parent_irq;
> + girq->first = irq_base;
> +
> + return 0;
> +}
> +
> +static int ep93xx_gpio_add_f_irq_chip(struct platform_device *pdev,
> + struct gpio_irq_chip *girq,
> + unsigned int irq_base)
> +{
> + int gpio_irq;
> + int i;
> + struct device *dev = &pdev->dev;
> +
> + /*
> + * FIXME: convert this to use hierarchical IRQ support!
> + * this requires fixing the root irqchip to be hierarchical.
> + */
> + girq->parent_handler = ep93xx_gpio_f_irq_handler;
> + girq->num_parents = 8;
> + girq->parents = devm_kcalloc(dev, girq->num_parents,
> + sizeof(*girq->parents),
> + GFP_KERNEL);
> + if (!girq->parents)
> + return -ENOMEM;
> + /* Pick resources 1..8 for these IRQs */
> + for (i = 0; i < ARRAY_SIZE(girq->parents); i++) {
> + girq->parents[i] = platform_get_irq(pdev, i + 1);
> + gpio_irq = irq_base + i;
> + irq_set_chip_data(gpio_irq, &epg->gc[5]);
> + irq_set_chip_and_handler(gpio_irq,
> + &ep93xx_gpio_irq_chip,
> + handle_level_irq);
> + irq_clear_status_flags(gpio_irq, IRQ_NOREQUEST);
> + }
> + girq->default_type = IRQ_TYPE_NONE;
> + girq->handler = handle_level_irq;
> + girq->first = irq_base;
> +
> + return 0;
> +}
> +
> static int ep93xx_gpio_add_bank(struct gpio_chip *gc,
> struct platform_device *pdev,
> struct ep93xx_gpio *epg,
> @@ -380,50 +438,16 @@ static int ep93xx_gpio_add_bank(struct
> gpio_chip *gc,
> }
>
> if (bank->has_irq) {
> - int ab_parent_irq = platform_get_irq(pdev, 0);
> -
> - girq->parent_handler = ep93xx_gpio_ab_irq_handler;
> - girq->num_parents = 1;
> - girq->parents = devm_kcalloc(dev, girq->num_parents,
> - sizeof(*girq->parents),
> - GFP_KERNEL);
> - if (!girq->parents)
> - return -ENOMEM;
> - girq->default_type = IRQ_TYPE_NONE;
> - girq->handler = handle_level_irq;
> - girq->parents[0] = ab_parent_irq;
> - girq->first = bank->irq_base;
> + err = ep93xx_gpio_add_ab_irq_chip(pdev, girq, bank-
> >irq_base);
> + if (err)
> + return err;
> }
>
> /* Only bank F has especially funky IRQ handling */
> if (bank->has_hierarchical_irq) {
> - int gpio_irq;
> - int i;
> -
> - /*
> - * FIXME: convert this to use hierarchical IRQ
> support!
> - * this requires fixing the root irqchip to be
> hierarchical.
> - */
> - girq->parent_handler = ep93xx_gpio_f_irq_handler;
> - girq->num_parents = 8;
> - girq->parents = devm_kcalloc(dev, girq->num_parents,
> - sizeof(*girq->parents),
> - GFP_KERNEL);
> - if (!girq->parents)
> - return -ENOMEM;
> - /* Pick resources 1..8 for these IRQs */
> - for (i = 0; i < ARRAY_SIZE(girq->parents); i++) {
> - girq->parents[i] = platform_get_irq(pdev, i +
> 1);
> - gpio_irq = EP93XX_GPIO_F_IRQ_BASE + i;
> - irq_set_chip_data(gpio_irq, &epg->gc[5]);
> - irq_set_chip_and_handler(gpio_irq,
> -
> &ep93xx_gpio_irq_chip,
> - handle_level_irq);
> - irq_clear_status_flags(gpio_irq,
> IRQ_NOREQUEST);
> - }
> - girq->default_type = IRQ_TYPE_NONE;
> - girq->handler = handle_level_irq;
> - girq->first = EP93XX_GPIO_F_IRQ_BASE;
> + err = ep93xx_gpio_add_f_irq_chip(pdev, girq,
> EP93XX_GPIO_F_IRQ_BASE);
> + if (err)
> + return err;
> }
>
> return devm_gpiochip_add_data(dev, gc, epg);
--
Alexander Sverdlin.
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