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Message-ID: <CAJxxZ0M5GA8bKc6xcxj0QuY=ezuh=RKVW7H0vZzdddh57YPatQ@mail.gmail.com>
Date: Fri, 8 May 2015 13:15:14 +0800
From: Sonic Zhang <sonic.adi@...il.com>
To: Linus Walleij <linus.walleij@...aro.org>
Cc: Linux Kernel <linux-kernel@...r.kernel.org>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
Sonic Zhang <sonic.zhang@...log.com>
Subject: Re: [PATCH 1/2] pinctrl: move strict option to pinmux_ops
Hi Walleij,
Acked-by: Sonic Zhang <sonic.zhang@...log.com>
Sonic
On Thu, May 7, 2015 at 5:53 PM, Linus Walleij <linus.walleij@...aro.org> wrote:
> While the pinmux_ops are ideally just a vtable for pin mux
> calls, the "strict" setting belongs so intuitively with the
> pin multiplexing that we should move it here anyway. Putting
> it in the top pinctrl_desc makes no sense.
>
> Cc: Sonic Zhang <sonic.zhang@...log.com>
> Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
> ---
> Documentation/pinctrl.txt | 2 +-
> drivers/pinctrl/pinctrl-adi2.c | 2 +-
> drivers/pinctrl/pinmux.c | 4 ++--
> include/linux/pinctrl/pinctrl.h | 3 ---
> include/linux/pinctrl/pinmux.h | 4 ++++
> 5 files changed, 8 insertions(+), 7 deletions(-)
>
> diff --git a/Documentation/pinctrl.txt b/Documentation/pinctrl.txt
> index d6b2bed94c43..4976389e432d 100644
> --- a/Documentation/pinctrl.txt
> +++ b/Documentation/pinctrl.txt
> @@ -73,7 +73,6 @@ static struct pinctrl_desc foo_desc = {
> .pins = foo_pins,
> .npins = ARRAY_SIZE(foo_pins),
> .owner = THIS_MODULE,
> - .strict = true,
> };
>
> int __init foo_probe(void)
> @@ -715,6 +714,7 @@ static struct pinmux_ops foo_pmxops = {
> .get_function_name = foo_get_fname,
> .get_function_groups = foo_get_groups,
> .set_mux = foo_set_mux,
> + .strict = true,
> };
>
> /* Pinmux operations are handled by some pin controller */
> diff --git a/drivers/pinctrl/pinctrl-adi2.c b/drivers/pinctrl/pinctrl-adi2.c
> index fbd492668da1..49df9037b41e 100644
> --- a/drivers/pinctrl/pinctrl-adi2.c
> +++ b/drivers/pinctrl/pinctrl-adi2.c
> @@ -703,6 +703,7 @@ static struct pinmux_ops adi_pinmux_ops = {
> .get_function_name = adi_pinmux_get_func_name,
> .get_function_groups = adi_pinmux_get_groups,
> .gpio_request_enable = adi_pinmux_request_gpio,
> + .strict = true,
> };
>
>
> @@ -710,7 +711,6 @@ static struct pinctrl_desc adi_pinmux_desc = {
> .name = DRIVER_NAME,
> .pctlops = &adi_pctrl_ops,
> .pmxops = &adi_pinmux_ops,
> - .strict = true,
> .owner = THIS_MODULE,
> };
>
> diff --git a/drivers/pinctrl/pinmux.c b/drivers/pinctrl/pinmux.c
> index 2546fa783464..c58c168b06c2 100644
> --- a/drivers/pinctrl/pinmux.c
> +++ b/drivers/pinctrl/pinmux.c
> @@ -107,7 +107,7 @@ static int pin_request(struct pinctrl_dev *pctldev,
> desc->name, desc->gpio_owner, owner);
> goto out;
> }
> - if (pctldev->desc->strict && desc->mux_usecount &&
> + if (ops->strict && desc->mux_usecount &&
> strcmp(desc->mux_owner, owner)) {
> dev_err(pctldev->dev,
> "pin %s already requested by %s; cannot claim for %s\n",
> @@ -123,7 +123,7 @@ static int pin_request(struct pinctrl_dev *pctldev,
> desc->name, desc->mux_owner, owner);
> goto out;
> }
> - if (pctldev->desc->strict && desc->gpio_owner) {
> + if (ops->strict && desc->gpio_owner) {
> dev_err(pctldev->dev,
> "pin %s already requested by %s; cannot claim for %s\n",
> desc->name, desc->gpio_owner, owner);
> diff --git a/include/linux/pinctrl/pinctrl.h b/include/linux/pinctrl/pinctrl.h
> index fc6b0348c375..66e4697516de 100644
> --- a/include/linux/pinctrl/pinctrl.h
> +++ b/include/linux/pinctrl/pinctrl.h
> @@ -114,8 +114,6 @@ struct pinctrl_ops {
> * of the pins field above
> * @pctlops: pin control operation vtable, to support global concepts like
> * grouping of pins, this is optional.
> - * @strict: check both gpio_owner and mux_owner strictly before approving
> - the pin request
> * @pmxops: pinmux operations vtable, if you support pinmuxing in your driver
> * @confops: pin config operations vtable, if you support pin configuration in
> * your driver
> @@ -134,7 +132,6 @@ struct pinctrl_desc {
> const struct pinctrl_ops *pctlops;
> const struct pinmux_ops *pmxops;
> const struct pinconf_ops *confops;
> - bool strict;
> struct module *owner;
> #ifdef CONFIG_GENERIC_PINCONF
> unsigned int num_custom_params;
> diff --git a/include/linux/pinctrl/pinmux.h b/include/linux/pinctrl/pinmux.h
> index 511bda9ed4bf..d3740fa7073f 100644
> --- a/include/linux/pinctrl/pinmux.h
> +++ b/include/linux/pinctrl/pinmux.h
> @@ -56,6 +56,9 @@ struct pinctrl_dev;
> * depending on whether the GPIO is configured as input or output,
> * a direction selector function may be implemented as a backing
> * to the GPIO controllers that need pin muxing.
> + * @strict: do not allow simultaneous use of the same pin for GPIO and another
> + * function. Check both gpio_owner and mux_owner strictly before approving
> + * the pin request.
> */
> struct pinmux_ops {
> int (*request) (struct pinctrl_dev *pctldev, unsigned offset);
> @@ -79,6 +82,7 @@ struct pinmux_ops {
> struct pinctrl_gpio_range *range,
> unsigned offset,
> bool input);
> + bool strict;
> };
>
> #endif /* CONFIG_PINMUX */
> --
> 1.9.3
>
> --
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