linux-kernel - Re: [PATCH] pinctrl: qcom: spmi-gpio: make the irqchip immutable

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Date:   Wed, 6 Jul 2022 19:30:31 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To:     Robert Marko <robimarko@...il.com>
Cc:     bjorn.andersson@...aro.org, agross@...nel.org,
        linus.walleij@...aro.org, linux-arm-msm@...r.kernel.org,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] pinctrl: qcom: spmi-gpio: make the irqchip immutable

On Fri, Jun 24, 2022 at 09:51:12PM +0200, Robert Marko wrote:
> Commit 6c846d026d49 ("gpio: Don't fiddle with irqchips marked as
> immutable") added a warning to indicate if the gpiolib is altering the
> internals of irqchips.
> 
> Following this change the following warning is now observed for the SPMI
> PMIC pinctrl driver:
> gpio gpiochip1: (200f000.spmi:pmic@0:gpio@...0): not an immutable chip, please consider fixing it!
> 
> Fix this by making the irqchip in the SPMI PMIC pinctrl driver immutable.
> 
> Signed-off-by: Robert Marko <robimarko@...il.com>

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>

I've also tested this patch on Lenovo X13s, so

Tested-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>

Thanks,
Mani

> ---
>  drivers/pinctrl/qcom/pinctrl-spmi-gpio.c | 22 ++++++++++++----------
>  1 file changed, 12 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/pinctrl/qcom/pinctrl-spmi-gpio.c b/drivers/pinctrl/qcom/pinctrl-spmi-gpio.c
> index c3255b0bece4..406ee0933d0b 100644
> --- a/drivers/pinctrl/qcom/pinctrl-spmi-gpio.c
> +++ b/drivers/pinctrl/qcom/pinctrl-spmi-gpio.c
> @@ -171,7 +171,6 @@ struct pmic_gpio_state {
>  	struct regmap	*map;
>  	struct pinctrl_dev *ctrl;
>  	struct gpio_chip chip;
> -	struct irq_chip irq;
>  	u8 usid;
>  	u8 pid_base;
>  };
> @@ -988,6 +987,17 @@ static void *pmic_gpio_populate_parent_fwspec(struct gpio_chip *chip,
>  	return fwspec;
>  }
>  
> +static const struct irq_chip spmi_gpio_irq_chip = {
> +	.name		= "spmi-gpio",
> +	.irq_ack	= irq_chip_ack_parent,
> +	.irq_mask	= irq_chip_mask_parent,
> +	.irq_unmask	= irq_chip_unmask_parent,
> +	.irq_set_type	= irq_chip_set_type_parent,
> +	.irq_set_wake	= irq_chip_set_wake_parent,
> +	.flags		= IRQCHIP_IMMUTABLE | IRQCHIP_MASK_ON_SUSPEND,
> +	GPIOCHIP_IRQ_RESOURCE_HELPERS,
> +};
> +
>  static int pmic_gpio_probe(struct platform_device *pdev)
>  {
>  	struct irq_domain *parent_domain;
> @@ -1081,16 +1091,8 @@ static int pmic_gpio_probe(struct platform_device *pdev)
>  	if (!parent_domain)
>  		return -ENXIO;
>  
> -	state->irq.name = "spmi-gpio",
> -	state->irq.irq_ack = irq_chip_ack_parent,
> -	state->irq.irq_mask = irq_chip_mask_parent,
> -	state->irq.irq_unmask = irq_chip_unmask_parent,
> -	state->irq.irq_set_type = irq_chip_set_type_parent,
> -	state->irq.irq_set_wake = irq_chip_set_wake_parent,
> -	state->irq.flags = IRQCHIP_MASK_ON_SUSPEND,
> -
>  	girq = &state->chip.irq;
> -	girq->chip = &state->irq;
> +	gpio_irq_chip_set_chip(girq, &spmi_gpio_irq_chip);
>  	girq->default_type = IRQ_TYPE_NONE;
>  	girq->handler = handle_level_irq;
>  	girq->fwnode = of_node_to_fwnode(state->dev->of_node);
> -- 
> 2.36.1
> 

-- 
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