linux-kernel - Re: [PATCH v3 09/15] pinctrl: renesas: pinctrl-rzg2l: Add function pointers for reading/writing OEN register

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Message-ID: <bbc6cc82-3209-44a4-ab46-577348972cce@tuxon.dev>
Date: Mon, 10 Jun 2024 08:55:53 +0300
From: claudiu beznea <claudiu.beznea@...on.dev>
To: Prabhakar <prabhakar.csengg@...il.com>,
 Geert Uytterhoeven <geert+renesas@...der.be>,
 Linus Walleij <linus.walleij@...aro.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Magnus Damm <magnus.damm@...il.com>
Cc: linux-renesas-soc@...r.kernel.org, linux-gpio@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 Biju Das <biju.das.jz@...renesas.com>,
 Claudiu Beznea <claudiu.beznea.uj@...renesas.com>,
 Fabrizio Castro <fabrizio.castro.jz@...esas.com>,
 Paul Barker <paul.barker.ct@...renesas.com>,
 Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: Re: [PATCH v3 09/15] pinctrl: renesas: pinctrl-rzg2l: Add function
 pointers for reading/writing OEN register



On 30.05.2024 20:38, Prabhakar wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> 
> This patch introduces function pointers, oen_read() and oen_write(), in the
> struct rzg2l_pinctrl_data to facilitate reading and writing to the PFC_OEN
> register. On the RZ/V2H(P) SoC, unlocking the PWPR.REGWE_B bit before
> writing to the PFC_OEN register is necessary, and the PFC_OEN register has
> more bits compared to the RZ/G2L family. To handle these differences
> between RZ/G2L and RZ/V2H(P) and to reuse the existing code for RZ/V2H(P),
> these function pointers are introduced.
> 
> Additionally, this patch populates these function pointers with appropriate
> data for existing SoCs.
> 
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>

Tested-by: Claudiu Beznea <claudiu.beznea.uj@...renesas.com> # on RZ/G3S

> ---
> v2->v3
> - Renamed read_oen->oen_read
> - Renamed write_oen->oen_write
> - Updated commit message
> 
> RFC->v2
> - No change
> ---
>  drivers/pinctrl/renesas/pinctrl-rzg2l.c | 12 ++++++++++--
>  1 file changed, 10 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/pinctrl/renesas/pinctrl-rzg2l.c b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
> index f8a1a1f2eebe..807851c33e48 100644
> --- a/drivers/pinctrl/renesas/pinctrl-rzg2l.c
> +++ b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
> @@ -255,6 +255,8 @@ struct rzg2l_pinctrl_data {
>  	unsigned int n_variable_pin_cfg;
>  	void (*pwpr_pfc_lock_unlock)(struct rzg2l_pinctrl *pctrl, bool lock);
>  	void (*pmc_writeb)(struct rzg2l_pinctrl *pctrl, u8 val, u16 offset);
> +	u32 (*oen_read)(struct rzg2l_pinctrl *pctrl, u32 caps, u32 offset, u8 pin);
> +	int (*oen_write)(struct rzg2l_pinctrl *pctrl, u32 caps, u32 offset, u8 pin, u8 oen);
>  };
>  
>  /**
> @@ -1035,7 +1037,7 @@ static int rzg2l_pinctrl_pinconf_get(struct pinctrl_dev *pctldev,
>  		break;
>  
>  	case PIN_CONFIG_OUTPUT_ENABLE:
> -		arg = rzg2l_read_oen(pctrl, cfg, _pin, bit);
> +		arg = pctrl->data->oen_read(pctrl, cfg, _pin, bit);
>  		if (!arg)
>  			return -EINVAL;
>  		break;
> @@ -1144,7 +1146,7 @@ static int rzg2l_pinctrl_pinconf_set(struct pinctrl_dev *pctldev,
>  
>  		case PIN_CONFIG_OUTPUT_ENABLE:
>  			arg = pinconf_to_config_argument(_configs[i]);
> -			ret = rzg2l_write_oen(pctrl, cfg, _pin, bit, !!arg);
> +			ret = pctrl->data->oen_write(pctrl, cfg, _pin, bit, !!arg);
>  			if (ret)
>  				return ret;
>  			break;
> @@ -2623,6 +2625,8 @@ static struct rzg2l_pinctrl_data r9a07g043_data = {
>  #endif
>  	.pwpr_pfc_lock_unlock = &rzg2l_pwpr_pfc_lock_unlock,
>  	.pmc_writeb = &rzg2l_pmc_writeb,
> +	.oen_read = &rzg2l_read_oen,
> +	.oen_write = &rzg2l_write_oen,
>  };
>  
>  static struct rzg2l_pinctrl_data r9a07g044_data = {
> @@ -2636,6 +2640,8 @@ static struct rzg2l_pinctrl_data r9a07g044_data = {
>  	.hwcfg = &rzg2l_hwcfg,
>  	.pwpr_pfc_lock_unlock = &rzg2l_pwpr_pfc_lock_unlock,
>  	.pmc_writeb = &rzg2l_pmc_writeb,
> +	.oen_read = &rzg2l_read_oen,
> +	.oen_write = &rzg2l_write_oen,
>  };
>  
>  static struct rzg2l_pinctrl_data r9a08g045_data = {
> @@ -2648,6 +2654,8 @@ static struct rzg2l_pinctrl_data r9a08g045_data = {
>  	.hwcfg = &rzg3s_hwcfg,
>  	.pwpr_pfc_lock_unlock = &rzg2l_pwpr_pfc_lock_unlock,
>  	.pmc_writeb = &rzg2l_pmc_writeb,
> +	.oen_read = &rzg2l_read_oen,
> +	.oen_write = &rzg2l_write_oen,
>  };
>  
>  static const struct of_device_id rzg2l_pinctrl_of_table[] = {