linux-kernel - Re: [PATCH v3 4/5] pinctrl: mediatek: Add Pinctrl/GPIO/EINT driver for mt2701

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Message-ID: <1451290066.11129.4.camel@mtksdaap41>
Date:	Mon, 28 Dec 2015 16:07:46 +0800
From:	Yingjoe Chen <yingjoe.chen@...iatek.com>
To:	Biao Huang <biao.huang@...iatek.com>
CC:	Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
	"Mark Rutland" <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	"Russell King" <linux@....linux.org.uk>,
	Matthias Brugger <matthias.bgg@...il.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-mediatek@...ts.infradead.org>, <linux-gpio@...r.kernel.org>,
	<srv_heupstream@...iatek.com>, <hongzhou.yang@...iatek.com>,
	<erin.lo@...iatek.com>
Subject: Re: [PATCH v3 4/5] pinctrl: mediatek: Add Pinctrl/GPIO/EINT driver
 for mt2701

On Mon, 2015-12-28 at 15:09 +0800, Biao Huang wrote:
> Add mt2701 support using mediatek common pinctrl driver.
> MT2701 have some special pins need an extra setting register
> than other ICs, so adding this support to common code.
> 
> Signed-off-by: Biao Huang <biao.huang@...iatek.com>
> Acked-by: Yingjoe Chen <yingjoe.chen@...iatek.com>
<...>
> +
> +static struct platform_driver mtk_pinctrl_driver = {
> +	.probe = mt2701_pinctrl_probe,
> +	.driver = {
> +		.name = "mediatek-mt2701-pinctrl",
> +		.owner = THIS_MODULE,
> +		.of_match_table = mt2701_pctrl_match,
> +	},
> +};
> +
> +static int __init mtk_pinctrl_init(void)
> +{
> +	return platform_driver_register(&mtk_pinctrl_driver);
> +}
> +
> +arch_initcall(mtk_pinctrl_init);


As discussed in
http://lists.infradead.org/pipermail/linux-mediatek/2015-December/003350.html
we should use subsys_initcall() instead.


> diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common.c b/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
> index f307f1d..76279f0 100644
> --- a/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
> +++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
<...>
> @@ -347,6 +352,7 @@ static int mtk_pconf_parse_conf(struct pinctrl_dev *pctldev,
>  		ret = mtk_pconf_set_pull_select(pctl, pin, true, false, arg);
>  		break;
>  	case PIN_CONFIG_INPUT_ENABLE:
> +		mtk_pmx_gpio_set_direction(pctldev, NULL, pin, true);
>  		ret = mtk_pconf_set_ies_smt(pctl, pin, arg, param);
>  		break;
>  	case PIN_CONFIG_OUTPUT:
> @@ -354,6 +360,7 @@ static int mtk_pconf_parse_conf(struct pinctrl_dev *pctldev,
>  		ret = mtk_pmx_gpio_set_direction(pctldev, NULL, pin, false);
>  		break;
>  	case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
> +		mtk_pmx_gpio_set_direction(pctldev, NULL, pin, true);
>  		ret = mtk_pconf_set_ies_smt(pctl, pin, arg, param);
>  		break;
>  	case PIN_CONFIG_DRIVE_STRENGTH:

This change is not directly related to adding mt2710 support and change
behavior for all MTK pinctrl drivers, please create a separate patch for
this.

Joe.C


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