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Message-ID: <CAHp75VdLd9UCNcMcCiQfR2OTepA+Z1fYQr6aWUuTP=wnNdCpVw@mail.gmail.com>
Date: Fri, 24 Mar 2023 16:57:01 +0200
From: Andy Shevchenko <andy.shevchenko@...il.com>
To: Chester Lin <clin@...e.com>
Cc: Linus Walleij <linus.walleij@...aro.org>,
NXP S32 Linux Team <s32@....com>,
linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
Ghennadi Procopciuc <Ghennadi.Procopciuc@....nxp.com>,
Andrei Stefanescu <andrei.stefanescu@....com>,
Radu Pirea <radu-nicolae.pirea@....com>,
Andreas Färber <afaerber@...e.de>,
Matthias Brugger <mbrugger@...e.com>
Subject: Re: [PATCH v4 5/5] pinctrl: s32: separate const device data from
struct s32_pinctrl_soc_info
On Fri, Mar 24, 2023 at 4:38 PM Chester Lin <clin@...e.com> wrote:
>
> The .data field in struct of_device_id is used as a const member so it's
> inappropriate to attach struct s32_pinctrl_soc_info with of_device_id
> because some members in s32_pinctrl_soc_info need to be filled by
> pinctrl-s32cc at runtime.
>
> For this reason, struct s32_pinctrl_soc_info must be allocated in
> pinctrl-s32cc and then create a new struct s32_pinctrl_soc_data in order
> to represent const .data in of_device_id. To combine these two structures,
> a s32_pinctrl_soc_data pointer is introduced in s32_pinctrl_soc_info.
>
> Besides, use of_device_get_match_data() instead of of_match_device() since
> the driver only needs to retrieve the .data from of_device_id.
Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>
(casting question is minor and can be addressed in v5, if can be done,
or when applying)
> Suggested-by: Andy Shevchenko <andy.shevchenko@...il.com>
> Signed-off-by: Chester Lin <clin@...e.com>
> ---
> Changes in v4:
> - Retrieve the matched device data by calling of_device_get_match_data()
> and remove unnecessary type casting. (Merged from the previous v3 series
> [PATCH v3 1/6])
>
> drivers/pinctrl/nxp/pinctrl-s32.h | 14 +++++++++-----
> drivers/pinctrl/nxp/pinctrl-s32cc.c | 30 +++++++++++++++++------------
> drivers/pinctrl/nxp/pinctrl-s32g2.c | 13 +++++--------
> 3 files changed, 32 insertions(+), 25 deletions(-)
>
> diff --git a/drivers/pinctrl/nxp/pinctrl-s32.h b/drivers/pinctrl/nxp/pinctrl-s32.h
> index 2f7aecd462e4..add3c77ddfed 100644
> --- a/drivers/pinctrl/nxp/pinctrl-s32.h
> +++ b/drivers/pinctrl/nxp/pinctrl-s32.h
> @@ -34,24 +34,28 @@ struct s32_pin_range {
> unsigned int end;
> };
>
> -struct s32_pinctrl_soc_info {
> - struct device *dev;
> +struct s32_pinctrl_soc_data {
> const struct pinctrl_pin_desc *pins;
> unsigned int npins;
> + const struct s32_pin_range *mem_pin_ranges;
> + unsigned int mem_regions;
> +};
> +
> +struct s32_pinctrl_soc_info {
> + struct device *dev;
> + const struct s32_pinctrl_soc_data *soc_data;
> struct s32_pin_group *groups;
> unsigned int ngroups;
> struct pinfunction *functions;
> unsigned int nfunctions;
> unsigned int grp_index;
> - const struct s32_pin_range *mem_pin_ranges;
> - unsigned int mem_regions;
> };
>
> #define S32_PINCTRL_PIN(pin) PINCTRL_PIN(pin, #pin)
> #define S32_PIN_RANGE(_start, _end) { .start = _start, .end = _end }
>
> int s32_pinctrl_probe(struct platform_device *pdev,
> - struct s32_pinctrl_soc_info *info);
> + const struct s32_pinctrl_soc_data *soc_data);
> int s32_pinctrl_resume(struct device *dev);
> int s32_pinctrl_suspend(struct device *dev);
> #endif /* __DRIVERS_PINCTRL_S32_H */
> diff --git a/drivers/pinctrl/nxp/pinctrl-s32cc.c b/drivers/pinctrl/nxp/pinctrl-s32cc.c
> index 8373468719b6..41e024160f36 100644
> --- a/drivers/pinctrl/nxp/pinctrl-s32cc.c
> +++ b/drivers/pinctrl/nxp/pinctrl-s32cc.c
> @@ -106,7 +106,7 @@ s32_get_region(struct pinctrl_dev *pctldev, unsigned int pin)
> {
> struct s32_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
> const struct s32_pin_range *pin_range;
> - unsigned int mem_regions = ipctl->info->mem_regions;
> + unsigned int mem_regions = ipctl->info->soc_data->mem_regions;
> unsigned int i;
>
> for (i = 0; i < mem_regions; i++) {
> @@ -688,8 +688,8 @@ int s32_pinctrl_suspend(struct device *dev)
> int ret;
> unsigned int config;
>
> - for (i = 0; i < info->npins; i++) {
> - pin = &info->pins[i];
> + for (i = 0; i < info->soc_data->npins; i++) {
> + pin = &info->soc_data->pins[i];
>
> if (!s32_pinctrl_should_save(ipctl, pin->number))
> continue;
> @@ -713,8 +713,8 @@ int s32_pinctrl_resume(struct device *dev)
> struct s32_pinctrl_context *saved_context = &ipctl->saved_context;
> int ret, i;
>
> - for (i = 0; i < info->npins; i++) {
> - pin = &info->pins[i];
> + for (i = 0; i < info->soc_data->npins; i++) {
> + pin = &info->soc_data->pins[i];
>
> if (!s32_pinctrl_should_save(ipctl, pin->number))
> continue;
> @@ -831,7 +831,7 @@ static int s32_pinctrl_probe_dt(struct platform_device *pdev,
> struct resource *res;
> struct regmap *map;
> void __iomem *base;
> - int mem_regions = info->mem_regions;
> + unsigned int mem_regions = info->soc_data->mem_regions;
> int ret;
> u32 nfuncs = 0;
> u32 i = 0;
> @@ -869,7 +869,7 @@ static int s32_pinctrl_probe_dt(struct platform_device *pdev,
> }
>
> ipctl->regions[i].map = map;
> - ipctl->regions[i].pin_range = &info->mem_pin_ranges[i];
> + ipctl->regions[i].pin_range = &info->soc_data->mem_pin_ranges[i];
> }
>
> nfuncs = of_get_child_count(np);
> @@ -904,20 +904,26 @@ static int s32_pinctrl_probe_dt(struct platform_device *pdev,
> }
>
> int s32_pinctrl_probe(struct platform_device *pdev,
> - struct s32_pinctrl_soc_info *info)
> + const struct s32_pinctrl_soc_data *soc_data)
> {
> struct s32_pinctrl *ipctl;
> int ret;
> struct pinctrl_desc *s32_pinctrl_desc;
> + struct s32_pinctrl_soc_info *info;
> #ifdef CONFIG_PM_SLEEP
> struct s32_pinctrl_context *saved_context;
> #endif
>
> - if (!info || !info->pins || !info->npins) {
> + if (!soc_data || !soc_data->pins || !soc_data->npins) {
> dev_err(&pdev->dev, "wrong pinctrl info\n");
> return -EINVAL;
> }
>
> + info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
> + if (!info)
> + return -ENOMEM;
> +
> + info->soc_data = soc_data;
> info->dev = &pdev->dev;
>
> /* Create state holders etc for this driver */
> @@ -938,8 +944,8 @@ int s32_pinctrl_probe(struct platform_device *pdev,
> return -ENOMEM;
>
> s32_pinctrl_desc->name = dev_name(&pdev->dev);
> - s32_pinctrl_desc->pins = info->pins;
> - s32_pinctrl_desc->npins = info->npins;
> + s32_pinctrl_desc->pins = info->soc_data->pins;
> + s32_pinctrl_desc->npins = info->soc_data->npins;
> s32_pinctrl_desc->pctlops = &s32_pctrl_ops;
> s32_pinctrl_desc->pmxops = &s32_pmx_ops;
> s32_pinctrl_desc->confops = &s32_pinconf_ops;
> @@ -960,7 +966,7 @@ int s32_pinctrl_probe(struct platform_device *pdev,
> #ifdef CONFIG_PM_SLEEP
> saved_context = &ipctl->saved_context;
> saved_context->pads =
> - devm_kcalloc(&pdev->dev, info->npins,
> + devm_kcalloc(&pdev->dev, info->soc_data->npins,
> sizeof(*saved_context->pads),
> GFP_KERNEL);
> if (!saved_context->pads)
> diff --git a/drivers/pinctrl/nxp/pinctrl-s32g2.c b/drivers/pinctrl/nxp/pinctrl-s32g2.c
> index d9f3ff6794ea..e0944c071c8c 100644
> --- a/drivers/pinctrl/nxp/pinctrl-s32g2.c
> +++ b/drivers/pinctrl/nxp/pinctrl-s32g2.c
> @@ -721,7 +721,7 @@ static const struct s32_pin_range s32_pin_ranges_siul2[] = {
> S32_PIN_RANGE(942, 1007),
> };
>
> -static struct s32_pinctrl_soc_info s32_pinctrl_info = {
> +static struct s32_pinctrl_soc_data s32_pinctrl_data = {
> .pins = s32_pinctrl_pads_siul2,
> .npins = ARRAY_SIZE(s32_pinctrl_pads_siul2),
> .mem_pin_ranges = s32_pin_ranges_siul2,
> @@ -732,7 +732,7 @@ static const struct of_device_id s32_pinctrl_of_match[] = {
> {
>
> .compatible = "nxp,s32g2-siul2-pinctrl",
> - .data = (void *) &s32_pinctrl_info,
> + .data = (void *) &s32_pinctrl_data,
> },
> { /* sentinel */ }
> };
> @@ -740,14 +740,11 @@ MODULE_DEVICE_TABLE(of, s32_pinctrl_of_match);
>
> static int s32g_pinctrl_probe(struct platform_device *pdev)
> {
> - const struct of_device_id *of_id =
> - of_match_device(s32_pinctrl_of_match, &pdev->dev);
> + const struct s32_pinctrl_soc_data *soc_data;
>
> - if (!of_id)
> - return -ENODEV;
> + soc_data = of_device_get_match_data(&pdev->dev);
>
> - return s32_pinctrl_probe
> - (pdev, (struct s32_pinctrl_soc_info *) of_id->data);
> + return s32_pinctrl_probe(pdev, soc_data);
> }
>
> static const struct dev_pm_ops s32g_pinctrl_pm_ops = {
> --
> 2.37.3
>
--
With Best Regards,
Andy Shevchenko
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