linux-kernel - Re: [PATCH v2] pinctrl: samsung: Add support for pull-up and pull-down

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Message-ID: <38fae674-f672-46e0-a44e-1278deaaf36a@kernel.org>
Date: Mon, 24 Jun 2024 15:56:37 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Vishnu Reddy <vishnu.reddy@...sung.com>, krzysztof.kozlowski@...aro.org,
 s.nawrocki@...sung.com, alim.akhtar@...sung.com, linus.walleij@...aro.org
Cc: linux-arm-kernel@...ts.infradead.org, linux-samsung-soc@...r.kernel.org,
 linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
 pankaj.dubey@...sung.com, ravi.patel@...sung.com, gost.dev@...sung.com
Subject: Re: [PATCH v2] pinctrl: samsung: Add support for pull-up and
 pull-down

On 20/06/2024 12:34, Vishnu Reddy wrote:
> gpiolib framework has the implementation of setting up the
> PUD configuration for GPIO pins but there is no driver support.
> 
> Add support to handle the PUD configuration request from the
> userspace in samsung pinctrl driver.
> 
> Signed-off-by: Vishnu Reddy <vishnu.reddy@...sung.com>
> ---
> Verified the offset from the user manual of following Exynos SoC series
> and found the current code is taking care of correct offset for pull-up
> and pull-down
> 
> Exynos-3250
> Exynos-3470
> Exynos-4412
> Exynos-4415
> Exynos-5250
> Exynos-5260
> Exynos-5410
> Exynos-5420
> Exynos-5422
> Exynos-7420
> Exynos-7580
> Exynos-7880
> Exynos-9820
> Exynos-9830
> Exynos-4210
> Exynos-S5PC210
> Exynos-S5PV310
> 
> This patch is tested on FSD platform

You verified but...

> diff --git a/drivers/pinctrl/samsung/pinctrl-samsung.h b/drivers/pinctrl/samsung/pinctrl-samsung.h
> index d50ba6f07d5d..758b623a4bea 100644
> --- a/drivers/pinctrl/samsung/pinctrl-samsung.h
> +++ b/drivers/pinctrl/samsung/pinctrl-samsung.h
> @@ -61,6 +61,13 @@ enum pincfg_type {
>  #define PIN_CON_FUNC_INPUT		0x0
>  #define PIN_CON_FUNC_OUTPUT		0x1
>  
> +/*
> + * Values for the pin PUD register.
> + */
> +#define PIN_PUD_PULL_UP_DOWN_DISABLE	0x0
> +#define PIN_PUD_PULL_DOWN_ENABLE	0x1
> +#define PIN_PUD_PULL_UP_ENABLE		0x3

... I said it is not correct, so you send the same? If you think I was
wrong, then please respond and keep discussion going. Sending the same
suggests you just ignored my comment.

Look at two headers s5pv210-pinctrl.h and s3c64xx-pinctrl.h. How did you
resolve these?

Best regards,
Krzysztof