linux-kernel - Re: [PATCH 2/3] irqchip/stm32-exti: add STM32MP13 support

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Date:   Wed, 08 Dec 2021 13:41:26 +0000
From:   Marc Zyngier <maz@...nel.org>
To:     Alexandre Torgue <alexandre.torgue@...s.st.com>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Rob Herring <robh+dt@...nel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <devicetree@...r.kernel.org>
Subject: Re: [PATCH 2/3] irqchip/stm32-exti: add STM32MP13 support

On Wed, 08 Dec 2021 13:04:55 +0000,
Alexandre Torgue <alexandre.torgue@...s.st.com> wrote:
> 
> Enhance stm32-exti driver to support STM32MP13 SoC. This SoC uses the same
> hardware version than STM32MP15. Only EXTI line mapping is changed and
> following EXTI lines are supported: GPIO, RTC, I2C[1-5], UxART[1-8],
> USBH_EHCI, USBH_OHCI, USB_OTG, LPTIM[1-5], ETH[1-2].
> 
> Signed-off-by: Alexandre Torgue <alexandre.torgue@...s.st.com>
> 
> diff --git a/drivers/irqchip/irq-stm32-exti.c b/drivers/irqchip/irq-stm32-exti.c
> index b7cb2da71888..9d18f47040eb 100644
> --- a/drivers/irqchip/irq-stm32-exti.c
> +++ b/drivers/irqchip/irq-stm32-exti.c
> @@ -214,6 +214,48 @@ static const struct stm32_desc_irq stm32mp1_desc_irq[] = {
>  	{ .exti = 73, .irq_parent = 129, .chip = &stm32_exti_h_chip },
>  };
>  
> +static const struct stm32_desc_irq stm32mp13_desc_irq[] = {
> +	{ .exti = 0, .irq_parent = 6, .chip = &stm32_exti_h_chip },
> +	{ .exti = 1, .irq_parent = 7, .chip = &stm32_exti_h_chip },
> +	{ .exti = 2, .irq_parent = 8, .chip = &stm32_exti_h_chip },
> +	{ .exti = 3, .irq_parent = 9, .chip = &stm32_exti_h_chip },
> +	{ .exti = 4, .irq_parent = 10, .chip = &stm32_exti_h_chip },
> +	{ .exti = 5, .irq_parent = 24, .chip = &stm32_exti_h_chip },
> +	{ .exti = 6, .irq_parent = 65, .chip = &stm32_exti_h_chip },
> +	{ .exti = 7, .irq_parent = 66, .chip = &stm32_exti_h_chip },
> +	{ .exti = 8, .irq_parent = 67, .chip = &stm32_exti_h_chip },
> +	{ .exti = 9, .irq_parent = 68, .chip = &stm32_exti_h_chip },
> +	{ .exti = 10, .irq_parent = 41, .chip = &stm32_exti_h_chip },
> +	{ .exti = 11, .irq_parent = 43, .chip = &stm32_exti_h_chip },
> +	{ .exti = 12, .irq_parent = 77, .chip = &stm32_exti_h_chip },
> +	{ .exti = 13, .irq_parent = 78, .chip = &stm32_exti_h_chip },
> +	{ .exti = 14, .irq_parent = 106, .chip = &stm32_exti_h_chip },
> +	{ .exti = 15, .irq_parent = 109, .chip = &stm32_exti_h_chip },
> +	{ .exti = 16, .irq_parent = 1, .chip = &stm32_exti_h_chip },
> +	{ .exti = 19, .irq_parent = 3, .chip = &stm32_exti_h_chip_direct },
> +	{ .exti = 21, .irq_parent = 32, .chip = &stm32_exti_h_chip_direct },
> +	{ .exti = 22, .irq_parent = 34, .chip = &stm32_exti_h_chip_direct },
> +	{ .exti = 23, .irq_parent = 73, .chip = &stm32_exti_h_chip_direct },
> +	{ .exti = 24, .irq_parent = 93, .chip = &stm32_exti_h_chip_direct },
> +	{ .exti = 25, .irq_parent = 114, .chip = &stm32_exti_h_chip_direct },
> +	{ .exti = 26, .irq_parent = 38, .chip = &stm32_exti_h_chip_direct },
> +	{ .exti = 27, .irq_parent = 39, .chip = &stm32_exti_h_chip_direct },
> +	{ .exti = 28, .irq_parent = 40, .chip = &stm32_exti_h_chip_direct },
> +	{ .exti = 29, .irq_parent = 72, .chip = &stm32_exti_h_chip_direct },
> +	{ .exti = 30, .irq_parent = 53, .chip = &stm32_exti_h_chip_direct },
> +	{ .exti = 31, .irq_parent = 54, .chip = &stm32_exti_h_chip_direct },
> +	{ .exti = 32, .irq_parent = 83, .chip = &stm32_exti_h_chip_direct },
> +	{ .exti = 33, .irq_parent = 84, .chip = &stm32_exti_h_chip_direct },
> +	{ .exti = 44, .irq_parent = 96, .chip = &stm32_exti_h_chip_direct },
> +	{ .exti = 47, .irq_parent = 92, .chip = &stm32_exti_h_chip_direct },
> +	{ .exti = 48, .irq_parent = 116, .chip = &stm32_exti_h_chip_direct },
> +	{ .exti = 50, .irq_parent = 117, .chip = &stm32_exti_h_chip_direct },
> +	{ .exti = 52, .irq_parent = 118, .chip = &stm32_exti_h_chip_direct },
> +	{ .exti = 53, .irq_parent = 119, .chip = &stm32_exti_h_chip_direct },
> +	{ .exti = 68, .irq_parent = 63, .chip = &stm32_exti_h_chip_direct },
> +	{ .exti = 70, .irq_parent = 98, .chip = &stm32_exti_h_chip_direct },
> +};

Why does the driver need to carry these tables? This sort of
information should really come from DT, instead of being hardcoded in
the driver and bloating it for no reason. This all has a funny taste
of the board files we used to have pre-DT.

	M.

-- 
Without deviation from the norm, progress is not possible.