linux-kernel - RE: [PATCH V2 1/3] pinctrl: imx: Use function callbacks for SCU related functions

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Message-ID: <DB3PR0402MB3916914F181ED4FBA71B61C8F5290@DB3PR0402MB3916.eurprd04.prod.outlook.com>
Date:   Tue, 8 Sep 2020 05:04:00 +0000
From:   Anson Huang <anson.huang@....com>
To:     Aisheng Dong <aisheng.dong@....com>,
        "festevam@...il.com" <festevam@...il.com>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "stefan@...er.ch" <stefan@...er.ch>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "linus.walleij@...aro.org" <linus.walleij@...aro.org>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
CC:     dl-linux-imx <linux-imx@....com>
Subject: RE: [PATCH V2 1/3] pinctrl: imx: Use function callbacks for SCU
 related functions


> Subject: RE: [PATCH V2 1/3] pinctrl: imx: Use function callbacks for SCU
> related functions
> 
> > From: Anson Huang <Anson.Huang@....com>
> > Sent: Monday, September 7, 2020 8:33 PM
> >
> > Use function callbacks for SCU related functions in pinctrl-imx.c in
> > order to support the scenario of PINCTRL_IMX is built in while
> > PINCTRL_IMX_SCU is built as module, all drivers using SCU pinctrl
> > driver need to initialize the SCU related function callback.
> >
> > Signed-off-by: Anson Huang <Anson.Huang@....com>
> > ---
> > Changes since V1:
> > 	- split V1 [1/2] patch to 2 patches, this patch does the change of
> > using function
> > 	  callbacks for SCU related functions.
> > ---
> >  drivers/pinctrl/freescale/pinctrl-imx.c     |  8 +++----
> >  drivers/pinctrl/freescale/pinctrl-imx.h     | 37
> > +++++++++++++++++------------
> >  drivers/pinctrl/freescale/pinctrl-imx8dxl.c |  3 +++
> > drivers/pinctrl/freescale/pinctrl-imx8qm.c  |  3 +++
> > drivers/pinctrl/freescale/pinctrl-imx8qxp.c |  3 +++
> >  5 files changed, 35 insertions(+), 19 deletions(-)
> >
> > diff --git a/drivers/pinctrl/freescale/pinctrl-imx.c
> > b/drivers/pinctrl/freescale/pinctrl-imx.c
> > index 507e4af..b80c450 100644
> > --- a/drivers/pinctrl/freescale/pinctrl-imx.c
> > +++ b/drivers/pinctrl/freescale/pinctrl-imx.c
> > @@ -373,7 +373,7 @@ static int imx_pinconf_get(struct pinctrl_dev
> *pctldev,
> >  	const struct imx_pinctrl_soc_info *info = ipctl->info;
> >
> >  	if (info->flags & IMX_USE_SCU)
> > -		return imx_pinconf_get_scu(pctldev, pin_id, config);
> > +		return info->imx_pinconf_get(pctldev, pin_id, config);
> >  	else
> >  		return imx_pinconf_get_mmio(pctldev, pin_id, config);  } @@
> -423,7
> > +423,7 @@ static int imx_pinconf_set(struct pinctrl_dev *pctldev,
> >  	const struct imx_pinctrl_soc_info *info = ipctl->info;
> >
> >  	if (info->flags & IMX_USE_SCU)
> > -		return imx_pinconf_set_scu(pctldev, pin_id,
> > +		return info->imx_pinconf_set(pctldev, pin_id,
> >  					   configs, num_configs);
> >  	else
> >  		return imx_pinconf_set_mmio(pctldev, pin_id, @@ -440,7 +440,7
> @@
> > static void imx_pinconf_dbg_show(struct pinctrl_dev *pctldev,
> >  	int ret;
> >
> >  	if (info->flags & IMX_USE_SCU) {
> > -		ret = imx_pinconf_get_scu(pctldev, pin_id, &config);
> > +		ret = info->imx_pinconf_get(pctldev, pin_id, &config);
> >  		if (ret) {
> >  			dev_err(ipctl->dev, "failed to get %s pinconf\n",
> >  				pin_get_name(pctldev, pin_id));
> > @@ -629,7 +629,7 @@ static int imx_pinctrl_parse_groups(struct
> > device_node *np,
> >  	for (i = 0; i < grp->num_pins; i++) {
> >  		pin = &((struct imx_pin *)(grp->data))[i];
> >  		if (info->flags & IMX_USE_SCU)
> > -			imx_pinctrl_parse_pin_scu(ipctl, &grp->pins[i],
> > +			info->imx_pinctrl_parse_pin(ipctl, &grp->pins[i],
> >  						  pin, &list);
> >  		else
> >  			imx_pinctrl_parse_pin_mmio(ipctl, &grp->pins[i], diff --git
> > a/drivers/pinctrl/freescale/pinctrl-imx.h
> > b/drivers/pinctrl/freescale/pinctrl-imx.h
> > index 333d32b..40927ca 100644
> > --- a/drivers/pinctrl/freescale/pinctrl-imx.h
> > +++ b/drivers/pinctrl/freescale/pinctrl-imx.h
> > @@ -75,6 +75,21 @@ struct imx_cfg_params_decode {
> >  	bool invert;
> >  };
> >
> > +/**
> > + * @dev: a pointer back to containing device
> > + * @base: the offset to the controller in virtual memory  */ struct
> > +imx_pinctrl {
> > +	struct device *dev;
> > +	struct pinctrl_dev *pctl;
> > +	void __iomem *base;
> > +	void __iomem *input_sel_base;
> > +	const struct imx_pinctrl_soc_info *info;
> > +	struct imx_pin_reg *pin_regs;
> > +	unsigned int group_index;
> > +	struct mutex mutex;
> > +};
> > +
> 
> You seems missed my question in the former patch review.
> Could you clarify a bit why need move this part code?

Please check the mail, I have replied it yestoday as below, the function needs to use imx_pinctrl structure,
so it needs to be moved, otherwise, build will fail.

> Any reason to move this part of code?


It is because below function callback added in imx_pinctrl_soc_info structure need to use imx_pinctrl, otherwise, build will fail.

+       void (*imx_pinctrl_parse_pin)(struct imx_pinctrl *ipctl,

Anson