linux-kernel - Re: [PATCH v2 2/4] pinctrl: rockchip: fix pinmux bits for RK3328 GPIO3-B pins

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Date: Fri, 07 Jun 2024 14:32:22 +0200
From: Heiko Stuebner <heiko@...ech.de>
To: Linus Walleij <linus.walleij@...aro.org>, Huang-Huang Bao <i@....me>,
 kever.yang@...k-chips.com
Cc: linux-gpio@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
 Huang-Huang Bao <i@....me>
Subject:
 Re: [PATCH v2 2/4] pinctrl: rockchip: fix pinmux bits for RK3328 GPIO3-B pins

Am Donnerstag, 6. Juni 2024, 14:57:53 CEST schrieb Huang-Huang Bao:
> The pinmux bits for GPIO3-B1 to GPIO3-B6 pins are not explicitly
> specified in RK3328 TRM, however we can get hint from pad name and its
> correspinding IOMUX setting for pins in interface descriptions. The
> correspinding IOMIX settings for these pins can be found in the same
> row next to occurrences of following pad names in RK3328 TRM.
> 
> GPIO3-B1:  IO_TSPd5m0_CIFdata5m0_GPIO3B1vccio6
> GPIO3-B2: IO_TSPd6m0_CIFdata6m0_GPIO3B2vccio6
> GPIO3-B3: IO_TSPd7m0_CIFdata7m0_GPIO3B3vccio6
> GPIO3-B4: IO_CARDclkm0_GPIO3B4vccio6
> GPIO3-B5: IO_CARDrstm0_GPIO3B5vccio6
> GPIO3-B6: IO_CARDdetm0_GPIO3B6vccio6
> 
> Add pinmux data to rk3328_mux_recalced_data as mux register offset for
> these pins does not follow rockchip convention.
> 
> Signed-off-by: Huang-Huang Bao <i@....me>

This matches the information that I found in my TRM, thanks to your
detailed explanation.

Though I of course can't say if the TRM is just wrong or the hardware
changed after the pads-description was written.

Did you test the usage of these pins on your board?


Heiko



> ---
>  drivers/pinctrl/pinctrl-rockchip.c | 51 ++++++++++++++++++++++++++++++
>  1 file changed, 51 insertions(+)
> 
> diff --git a/drivers/pinctrl/pinctrl-rockchip.c b/drivers/pinctrl/pinctrl-rockchip.c
> index 78dcf4daccde..23531ea0d088 100644
> --- a/drivers/pinctrl/pinctrl-rockchip.c
> +++ b/drivers/pinctrl/pinctrl-rockchip.c
> @@ -634,17 +634,68 @@ static struct rockchip_mux_recalced_data rk3308_mux_recalced_data[] = {
>  
>  static struct rockchip_mux_recalced_data rk3328_mux_recalced_data[] = {
>  	{
> +		/* gpio2_b7_sel */
>  		.num = 2,
>  		.pin = 15,
>  		.reg = 0x28,
>  		.bit = 0,
>  		.mask = 0x7
>  	}, {
> +		/* gpio2_c7_sel */
>  		.num = 2,
>  		.pin = 23,
>  		.reg = 0x30,
>  		.bit = 14,
>  		.mask = 0x3
> +	}, {
> +		/* gpio3_b1_sel */
> +		.num = 3,
> +		.pin = 9,
> +		.reg = 0x44,
> +		.bit = 2,
> +		.mask = 0x3
> +	}, {
> +		/* gpio3_b2_sel */
> +		.num = 3,
> +		.pin = 10,
> +		.reg = 0x44,
> +		.bit = 4,
> +		.mask = 0x3
> +	}, {
> +		/* gpio3_b3_sel */
> +		.num = 3,
> +		.pin = 11,
> +		.reg = 0x44,
> +		.bit = 6,
> +		.mask = 0x3
> +	}, {
> +		/* gpio3_b4_sel */
> +		.num = 3,
> +		.pin = 12,
> +		.reg = 0x44,
> +		.bit = 8,
> +		.mask = 0x3
> +	}, {
> +		/* gpio3_b5_sel */
> +		.num = 3,
> +		.pin = 13,
> +		.reg = 0x44,
> +		.bit = 10,
> +		.mask = 0x3
> +	}, {
> +		/* gpio3_b6_sel */
> +		.num = 3,
> +		.pin = 14,
> +		.reg = 0x44,
> +		.bit = 12,
> +		.mask = 0x3
> +	}, {
> +		/* gpio3_b7_sel */
> +		.num = 3,
> +		.pin = 15,
> +		.reg = 0x44,
> +		.bit = 14,
> +		.mask = 0x3
>  	},
>  };
>  
>