linux-kernel - Re: [PATCH 1/6] pinctrl: sprd: Modify the probe function parameters

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Date:   Fri, 25 Aug 2023 13:08:53 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Linhua Xu <Linhua.xu@...soc.com>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Orson Zhai <orsonzhai@...il.com>,
        Baolin Wang <baolin.wang@...ux.alibaba.com>,
        Chunyan Zhang <zhang.lyra@...il.com>,
        linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
        lh xu <xulh0829@...il.com>,
        Xiongpeng Wu <xiongpeng.wu@...soc.com>
Subject: Re: [PATCH 1/6] pinctrl: sprd: Modify the probe function parameters

On Fri, Aug 25, 2023 at 11:18:21AM +0800, Linhua Xu wrote:
> From: Linhua Xu <Linhua.Xu@...soc.com>
> 
> For UNISOC pin controller, the offset values of the common register and
> misc register will be different. Thus put these in the probe function
> parameters.

...

> +#define	PINCTRL_REG_OFFSET		0x20

0x0020

> +#define	PINCTRL_REG_MISC_OFFSET		0x4020

...

>  		if (pin->type == GLOBAL_CTRL_PIN) {
> -			pin->reg = (unsigned long)sprd_pctl->base +
> -				PINCTRL_REG_LEN * reg;
> +			pin->reg = (unsigned long)(sprd_pctl->base +
> +				(unsigned long)(PINCTRL_REG_LEN * reg));

Please, make sure you get rid of castings completely. They are weird
for the start and may lead to bugs.

>  			pin->bit_offset = sprd_soc_pin_info[i].bit_offset;
>  			pin->bit_width = sprd_soc_pin_info[i].bit_width;
>  			ctrl_pin++;
>  		} else if (pin->type == COMMON_PIN) {
>  			pin->reg = (unsigned long)sprd_pctl->base +
> -				PINCTRL_REG_OFFSET + PINCTRL_REG_LEN *
> +				sprd_pctl->common_pin_offset + PINCTRL_REG_LEN *
>  				(i - ctrl_pin);
>  			com_pin++;
>  		} else if (pin->type == MISC_PIN) {
>  			pin->reg = (unsigned long)sprd_pctl->base +
> -				PINCTRL_REG_MISC_OFFSET + PINCTRL_REG_LEN *
> +				sprd_pctl->misc_pin_offset + PINCTRL_REG_LEN *
>  				(i - ctrl_pin - com_pin);
>  		}

Ditto.

-- 
With Best Regards,
Andy Shevchenko