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Date: Mon, 7 Sep 2020 08:34:24 +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 1/2] pinctrl: imx: Support building SCU pinctrl driver as
module
> Subject: RE: [PATCH 1/2] pinctrl: imx: Support building SCU pinctrl driver as
> module
>
> > From: Anson Huang <Anson.Huang@....com>
> > Sent: Thursday, July 16, 2020 11:07 PM
> > Subject: [PATCH 1/2] pinctrl: imx: Support building SCU pinctrl driver
> > as module
> >
> > To support building i.MX SCU pinctrl driver as module, below things
> > need to be
> > changed:
> >
> > - Export SCU related functions
>
> This line seems not comply with the patch anymore
>
OK.
> > and use "IS_ENABLED" instead of
> > "ifdef" to support SCU pinctrl driver user and itself to be
> > built as module;
> > - 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;
> > - Change PINCTR_IMX_SCU to tristate;
> > - Add module author, description and license.
> >
> > With above changes, i.MX SCU pinctrl driver can be built as module.
> >
> > Signed-off-by: Anson Huang <Anson.Huang@....com>
> > ---
> > drivers/pinctrl/freescale/Kconfig | 2 +-
> > drivers/pinctrl/freescale/pinctrl-imx.c | 8 ++--
> > drivers/pinctrl/freescale/pinctrl-imx.h | 57 ++++++++++++-----------------
> > drivers/pinctrl/freescale/pinctrl-imx8dxl.c | 3 ++
> > drivers/pinctrl/freescale/pinctrl-imx8qm.c | 3 ++
> > drivers/pinctrl/freescale/pinctrl-imx8qxp.c | 3 ++
> > drivers/pinctrl/freescale/pinctrl-scu.c | 5 +++
> > 7 files changed, 42 insertions(+), 39 deletions(-)
> >
> > diff --git a/drivers/pinctrl/freescale/Kconfig
> > b/drivers/pinctrl/freescale/Kconfig
> > index 08fcf5c..570355c 100644
> > --- a/drivers/pinctrl/freescale/Kconfig
> > +++ b/drivers/pinctrl/freescale/Kconfig
> > @@ -7,7 +7,7 @@ config PINCTRL_IMX
> > select REGMAP
> >
> > config PINCTRL_IMX_SCU
> > - bool
> > + tristate "IMX SCU pinctrl driver"
>
> IMX SCU pinctrl core driver
>
Will change it in V2.
> > depends on IMX_SCU
> > select PINCTRL_IMX
> >
> > 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..bdb86c2 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;
> > +};
>
> 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
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