Re: [PATCH v1 3/3] pinctrl: th1520: Factor out casts

From: Drew Fustini <dfustini@tenstorrent.com>
To: Emil Renner Berthing <emil.renner.berthing@canonical.com>
Cc: linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org,
	devicetree@vger.kernel.org, linux-riscv@lists.infradead.org,
	Linus Walleij <linus.walleij@linaro.org>,
	Jisheng Zhang <jszhang@kernel.org>, Guo Ren <guoren@kernel.org>,
	Fu Wei <wefu@redhat.com>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Thomas Bonnefille <thomas.bonnefille@bootlin.com>
Subject: Re: [PATCH v1 3/3] pinctrl: th1520: Factor out casts
Date: Fri, 11 Oct 2024 09:35:25 -0700	[thread overview]
Message-ID: <ZwlTzbsiyr8994S+@x1> (raw)
In-Reply-To: <20241011144826.381104-4-emil.renner.berthing@canonical.com>

On Fri, Oct 11, 2024 at 04:48:25PM +0200, Emil Renner Berthing wrote:
> Limit the casts to get the mux data and flags from the driver data
> pointer with each pin to two inline functions as requested by Andy
> during review.
> 
> Signed-off-by: Emil Renner Berthing <emil.renner.berthing@canonical.com>
> ---
>  drivers/pinctrl/pinctrl-th1520.c | 22 +++++++++++++++++-----
>  1 file changed, 17 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/pinctrl/pinctrl-th1520.c b/drivers/pinctrl/pinctrl-th1520.c
> index 8bd40cb2f013..7474d8da32f9 100644
> --- a/drivers/pinctrl/pinctrl-th1520.c
> +++ b/drivers/pinctrl/pinctrl-th1520.c
> @@ -152,6 +152,16 @@ static enum th1520_muxtype th1520_muxtype_get(const char *str)
>  		(TH1520_MUX_##m0 <<  0) | (TH1520_MUX_##m1 <<  5) | (TH1520_MUX_##m2 << 10) | \
>  		(TH1520_MUX_##m3 << 15) | (TH1520_MUX_##m4 << 20) | (TH1520_MUX_##m5 << 25)) }
>  
> +static unsigned long th1520_pad_muxdata(void *drv_data)
> +{
> +	return (uintptr_t)drv_data & TH1520_PAD_MUXDATA;
> +}
> +
> +static bool th1520_pad_no_padcfg(void *drv_data)
> +{
> +	return (uintptr_t)drv_data & TH1520_PAD_NO_PADCFG;
> +}
> +
>  static const struct pinctrl_pin_desc th1520_group1_pins[] = {
>  	TH1520_PAD(0,  OSC_CLK_IN,    ____, ____, ____, ____, ____, ____, TH1520_PAD_NO_PADCFG),
>  	TH1520_PAD(1,  OSC_CLK_OUT,   ____, ____, ____, ____, ____, ____, TH1520_PAD_NO_PADCFG),
> @@ -590,7 +600,7 @@ static int th1520_pinconf_get(struct pinctrl_dev *pctldev,
>  	u32 value;
>  	u32 arg;
>  
> -	if ((uintptr_t)desc->drv_data & TH1520_PAD_NO_PADCFG)
> +	if (th1520_pad_no_padcfg(desc->drv_data))
>  		return -ENOTSUPP;
>  
>  	value = readl_relaxed(th1520_padcfg(thp, pin));
> @@ -660,7 +670,7 @@ static int th1520_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
>  	unsigned int i;
>  	u16 mask, value;
>  
> -	if ((uintptr_t)desc->drv_data & TH1520_PAD_NO_PADCFG)
> +	if (th1520_pad_no_padcfg(desc->drv_data))
>  		return -ENOTSUPP;
>  
>  	mask = 0;
> @@ -793,12 +803,14 @@ static int th1520_pinmux_set_mux(struct pinctrl_dev *pctldev,
>  {
>  	struct th1520_pinctrl *thp = pinctrl_dev_get_drvdata(pctldev);
>  	const struct function_desc *func = pinmux_generic_get_function(pctldev, fsel);
> +	enum th1520_muxtype muxtype = (uintptr_t)func->data;
>  
>  	if (!func)
>  		return -EINVAL;
> +
>  	return th1520_pinmux_set(thp, thp->desc.pins[gsel].number,
> -				 (uintptr_t)thp->desc.pins[gsel].drv_data & TH1520_PAD_MUXDATA,
> -				 (uintptr_t)func->data);
> +				 th1520_pad_muxdata(thp->desc.pins[gsel].drv_data),
> +				 muxtype);
>  }
>  
>  static int th1520_gpio_request_enable(struct pinctrl_dev *pctldev,
> @@ -809,7 +821,7 @@ static int th1520_gpio_request_enable(struct pinctrl_dev *pctldev,
>  	const struct pin_desc *desc = pin_desc_get(pctldev, offset);
>  
>  	return th1520_pinmux_set(thp, offset,
> -				 (uintptr_t)desc->drv_data & TH1520_PAD_MUXDATA,
> +				 th1520_pad_muxdata(desc->drv_data),
>  				 TH1520_MUX_GPIO);
>  }
>  
> -- 
> 2.43.0
> 

Reviewed-by: Drew Fustini <dfustini@tenstorrent.com>

Thanks for improving this. I see the feedback from Andy [1] on your v2
now that you mention it.

-Drew

[1] https://lore.kernel.org/linux-gpio/Zj8K_0zpI_IAY66R@surfacebook.localdomain/