linux-kernel - Re: [PATCH 2/2] pinctrl: stm32: add syscfg mask parameter

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Message-ID: <4acc415d-f162-67a2-57d6-0a7defda434f@st.com>
Date:   Tue, 17 Jul 2018 15:11:22 +0200
From:   Ludovic BARRE <ludovic.barre@...com>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Rob Herring <robh+dt@...nel.org>
CC:     Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        <linux-gpio@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] pinctrl: stm32: add syscfg mask parameter

Hi

add Rob, I forgotten rob's mail.

On 07/17/2018 11:56 AM, Ludovic Barre wrote:
> From: Ludovic Barre <ludovic.barre@...com>
> 
> This patch adds mask parameter to define IRQ mux field.
> This field could vary depend of IRQ mux selection register.
> To avoid backward compatibility, the drivers set
> the legacy value by default.
> 
> Signed-off-by: Ludovic Barre <ludovic.barre@...com>
> ---
>   drivers/pinctrl/stm32/pinctrl-stm32.c | 16 ++++++++++++++--
>   1 file changed, 14 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/pinctrl/stm32/pinctrl-stm32.c b/drivers/pinctrl/stm32/pinctrl-stm32.c
> index dfed609..f756232 100644
> --- a/drivers/pinctrl/stm32/pinctrl-stm32.c
> +++ b/drivers/pinctrl/stm32/pinctrl-stm32.c
> @@ -46,6 +46,8 @@
>   #define STM32_GPIO_PINS_PER_BANK 16
>   #define STM32_GPIO_IRQ_LINE	 16
>   
> +#define SYSCFG_IRQMUX_MASK GENMASK(3, 0)
> +
>   #define gpio_range_to_bank(chip) \
>   		container_of(chip, struct stm32_gpio_bank, range)
>   
> @@ -1033,6 +1035,7 @@ static int stm32_pctrl_dt_setup_irq(struct platform_device *pdev,
>   	struct device *dev = &pdev->dev;
>   	struct regmap *rm;
>   	int offset, ret, i;
> +	int mask, mask_width;
>   
>   	parent = of_irq_find_parent(np);
>   	if (!parent)
> @@ -1052,12 +1055,21 @@ static int stm32_pctrl_dt_setup_irq(struct platform_device *pdev,
>   	if (ret)
>   		return ret;
>   
> +	ret = of_property_read_u32_index(np, "st,syscfg", 2, &mask);
> +	if (ret)
> +		mask = SYSCFG_IRQMUX_MASK;
> +
> +	mask_width = fls(mask);
> +
>   	for (i = 0; i < STM32_GPIO_PINS_PER_BANK; i++) {
>   		struct reg_field mux;
>   
>   		mux.reg = offset + (i / 4) * 4;
> -		mux.lsb = (i % 4) * 4;
> -		mux.msb = mux.lsb + 3;
> +		mux.lsb = (i % 4) * mask_width;
> +		mux.msb = mux.lsb + mask_width - 1;
> +
> +		dev_dbg(dev, "irqmux%d: reg:%#x, lsb:%d, msb:%d\n",
> +			i, mux.reg, mux.lsb, mux.msb);
>   
>   		pctl->irqmux[i] = devm_regmap_field_alloc(dev, rm, mux);
>   		if (IS_ERR(pctl->irqmux[i]))
>