RE: [PATCH] gpio: adp5588: Use irqchip template

["Hennerich, Michael" <Michael.Hennerich@analog.com>]

> -----Original Message-----
> From: Linus Walleij <linus.walleij@linaro.org>
> Sent: Donnerstag, 16. Juli 2020 17:05
> To: linux-gpio@vger.kernel.org
> Cc: Bartosz Golaszewski <bgolaszewski@baylibre.com>; Linus Walleij
> <linus.walleij@linaro.org>; Nikolaus Voss <nv@vosn.de>; Hennerich, Michael
> <Michael.Hennerich@analog.com>
> Subject: [PATCH] gpio: adp5588: Use irqchip template
> 
> This makes the driver use the irqchip template to assign properties to the
> gpio_irq_chip instead of using the explicit calls to
> gpiochip_irqchip_add_nested() and gpiochip_set_nested_irqchip(). The irqchip
> is instead added while adding the gpiochip.
> 
> Cc: Nikolaus Voss <nv@vosn.de>
> Cc: Michael Hennerich <michael.hennerich@analog.com>
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Acked-by: Michael Hennerich <michael.hennerich@analog.com>

> ---
>  drivers/gpio/gpio-adp5588.c | 39 +++++++++++++++++++++++--------------
>  1 file changed, 24 insertions(+), 15 deletions(-)
> 
> diff --git a/drivers/gpio/gpio-adp5588.c b/drivers/gpio/gpio-adp5588.c index
> 49f423d7beba..f1e4ac90e7d3 100644
> --- a/drivers/gpio/gpio-adp5588.c
> +++ b/drivers/gpio/gpio-adp5588.c
> @@ -272,13 +272,24 @@ static irqreturn_t adp5588_irq_handler(int irq, void
> *devid)
>  	return IRQ_HANDLED;
>  }
> 
> +
> +static int adp5588_irq_init_hw(struct gpio_chip *gc) {
> +	struct adp5588_gpio *dev = gpiochip_get_data(gc);
> +	/* Enable IRQs after registering chip */
> +	adp5588_gpio_write(dev->client, CFG,
> +			   ADP5588_AUTO_INC | ADP5588_INT_CFG |
> ADP5588_KE_IEN);
> +
> +	return 0;
> +}
> +
>  static int adp5588_irq_setup(struct adp5588_gpio *dev)  {
>  	struct i2c_client *client = dev->client;
>  	int ret;
>  	struct adp5588_gpio_platform_data *pdata =
>  			dev_get_platdata(&client->dev);
> -	int irq_base = pdata ? pdata->irq_base : 0;
> +	struct gpio_irq_chip *girq;
> 
>  	adp5588_gpio_write(client, CFG, ADP5588_AUTO_INC);
>  	adp5588_gpio_write(client, INT_STAT, -1); /* status is W1C */ @@ -
> 294,21 +305,19 @@ static int adp5588_irq_setup(struct adp5588_gpio *dev)
>  			client->irq);
>  		return ret;
>  	}
> -	ret = gpiochip_irqchip_add_nested(&dev->gpio_chip,
> -					  &adp5588_irq_chip, irq_base,
> -					  handle_simple_irq,
> -					  IRQ_TYPE_NONE);
> -	if (ret) {
> -		dev_err(&client->dev,
> -			"could not connect irqchip to gpiochip\n");
> -		return ret;
> -	}
> -	gpiochip_set_nested_irqchip(&dev->gpio_chip,
> -				    &adp5588_irq_chip,
> -				    client->irq);
> 
> -	adp5588_gpio_write(client, CFG,
> -		ADP5588_AUTO_INC | ADP5588_INT_CFG |
> ADP5588_KE_IEN);
> +	/* This will be registered in the call to devm_gpiochip_add_data() */
> +	girq = &dev->gpio_chip.irq;
> +	girq->chip = &adp5588_irq_chip;
> +	/* This will let us handle the parent IRQ in the driver */
> +	girq->parent_handler = NULL;
> +	girq->num_parents = 0;
> +	girq->parents = NULL;
> +	girq->first = pdata ? pdata->irq_base : 0;
> +	girq->default_type = IRQ_TYPE_NONE;
> +	girq->handler = handle_simple_irq;
> +	girq->init_hw = adp5588_irq_init_hw;
> +	girq->threaded = true;
> 
>  	return 0;
>  }
> --
> 2.26.2