From: Bartosz Golaszewski <brgl@bgdev.pl>
To: Kent Gibson <warthog618@gmail.com>,
Linus Walleij <linus.walleij@linaro.org>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org,
Bartosz Golaszewski <bgolaszewski@baylibre.com>
Subject: [RESEND PATCH v6 5/7] gpiolib: provide a dedicated function for setting lineinfo
Date: Tue, 11 Feb 2020 10:19:35 +0100 [thread overview]
Message-ID: <20200211091937.29558-6-brgl@bgdev.pl> (raw)
In-Reply-To: <20200211091937.29558-1-brgl@bgdev.pl>
From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
We'll soon be filling out the gpioline_info structure in multiple
places. Add a separate function that given a gpio_desc sets all relevant
fields.
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
drivers/gpio/gpiolib.c | 98 ++++++++++++++++++++++++------------------
1 file changed, 55 insertions(+), 43 deletions(-)
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 36afe0b2b150..443321f9cf63 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -1147,6 +1147,60 @@ static int lineevent_create(struct gpio_device *gdev, void __user *ip)
return ret;
}
+static void gpio_desc_to_lineinfo(struct gpio_desc *desc,
+ struct gpioline_info *info)
+{
+ struct gpio_chip *chip = desc->gdev->chip;
+ unsigned long flags;
+
+ spin_lock_irqsave(&gpio_lock, flags);
+
+ if (desc->name) {
+ strncpy(info->name, desc->name, sizeof(info->name));
+ info->name[sizeof(info->name) - 1] = '\0';
+ } else {
+ info->name[0] = '\0';
+ }
+
+ if (desc->label) {
+ strncpy(info->consumer, desc->label, sizeof(info->consumer));
+ info->consumer[sizeof(info->consumer) - 1] = '\0';
+ } else {
+ info->consumer[0] = '\0';
+ }
+
+ /*
+ * Userspace only need to know that the kernel is using this GPIO so
+ * it can't use it.
+ */
+ info->flags = 0;
+ if (test_bit(FLAG_REQUESTED, &desc->flags) ||
+ test_bit(FLAG_IS_HOGGED, &desc->flags) ||
+ test_bit(FLAG_USED_AS_IRQ, &desc->flags) ||
+ test_bit(FLAG_EXPORT, &desc->flags) ||
+ test_bit(FLAG_SYSFS, &desc->flags) ||
+ !pinctrl_gpio_can_use_line(chip->base + info->line_offset))
+ info->flags |= GPIOLINE_FLAG_KERNEL;
+ if (test_bit(FLAG_IS_OUT, &desc->flags))
+ info->flags |= GPIOLINE_FLAG_IS_OUT;
+ if (test_bit(FLAG_ACTIVE_LOW, &desc->flags))
+ info->flags |= GPIOLINE_FLAG_ACTIVE_LOW;
+ if (test_bit(FLAG_OPEN_DRAIN, &desc->flags))
+ info->flags |= (GPIOLINE_FLAG_OPEN_DRAIN |
+ GPIOLINE_FLAG_IS_OUT);
+ if (test_bit(FLAG_OPEN_SOURCE, &desc->flags))
+ info->flags |= (GPIOLINE_FLAG_OPEN_SOURCE |
+ GPIOLINE_FLAG_IS_OUT);
+ if (test_bit(FLAG_BIAS_DISABLE, &desc->flags))
+ info->flags |= GPIOLINE_FLAG_BIAS_DISABLE;
+ if (test_bit(FLAG_PULL_DOWN, &desc->flags))
+ info->flags |= GPIOLINE_FLAG_BIAS_PULL_DOWN;
+ if (test_bit(FLAG_PULL_UP, &desc->flags))
+ info->flags |= GPIOLINE_FLAG_BIAS_PULL_UP;
+
+ spin_unlock_irqrestore(&gpio_lock, flags);
+}
+
/*
* gpio_ioctl() - ioctl handler for the GPIO chardev
*/
@@ -1187,49 +1241,7 @@ static long gpio_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
if (IS_ERR(desc))
return PTR_ERR(desc);
- if (desc->name) {
- strncpy(lineinfo.name, desc->name,
- sizeof(lineinfo.name));
- lineinfo.name[sizeof(lineinfo.name)-1] = '\0';
- } else {
- lineinfo.name[0] = '\0';
- }
- if (desc->label) {
- strncpy(lineinfo.consumer, desc->label,
- sizeof(lineinfo.consumer));
- lineinfo.consumer[sizeof(lineinfo.consumer)-1] = '\0';
- } else {
- lineinfo.consumer[0] = '\0';
- }
-
- /*
- * Userspace only need to know that the kernel is using
- * this GPIO so it can't use it.
- */
- lineinfo.flags = 0;
- if (test_bit(FLAG_REQUESTED, &desc->flags) ||
- test_bit(FLAG_IS_HOGGED, &desc->flags) ||
- test_bit(FLAG_USED_AS_IRQ, &desc->flags) ||
- test_bit(FLAG_EXPORT, &desc->flags) ||
- test_bit(FLAG_SYSFS, &desc->flags) ||
- !pinctrl_gpio_can_use_line(chip->base + lineinfo.line_offset))
- lineinfo.flags |= GPIOLINE_FLAG_KERNEL;
- if (test_bit(FLAG_IS_OUT, &desc->flags))
- lineinfo.flags |= GPIOLINE_FLAG_IS_OUT;
- if (test_bit(FLAG_ACTIVE_LOW, &desc->flags))
- lineinfo.flags |= GPIOLINE_FLAG_ACTIVE_LOW;
- if (test_bit(FLAG_OPEN_DRAIN, &desc->flags))
- lineinfo.flags |= (GPIOLINE_FLAG_OPEN_DRAIN |
- GPIOLINE_FLAG_IS_OUT);
- if (test_bit(FLAG_OPEN_SOURCE, &desc->flags))
- lineinfo.flags |= (GPIOLINE_FLAG_OPEN_SOURCE |
- GPIOLINE_FLAG_IS_OUT);
- if (test_bit(FLAG_BIAS_DISABLE, &desc->flags))
- lineinfo.flags |= GPIOLINE_FLAG_BIAS_DISABLE;
- if (test_bit(FLAG_PULL_DOWN, &desc->flags))
- lineinfo.flags |= GPIOLINE_FLAG_BIAS_PULL_DOWN;
- if (test_bit(FLAG_PULL_UP, &desc->flags))
- lineinfo.flags |= GPIOLINE_FLAG_BIAS_PULL_UP;
+ gpio_desc_to_lineinfo(desc, &lineinfo);
if (copy_to_user(ip, &lineinfo, sizeof(lineinfo)))
return -EFAULT;
--
2.25.0
next prev parent reply other threads:[~2020-02-11 9:19 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-11 9:19 [RESEND PATCH v6 0/7] gpiolib: add an ioctl() for monitoring line status changes Bartosz Golaszewski
2020-02-11 9:19 ` [RESEND PATCH v6 1/7] kfifo: provide noirqsave variants of spinlocked in and out helpers Bartosz Golaszewski
2020-02-11 9:19 ` [RESEND PATCH v6 2/7] kfifo: provide kfifo_is_empty_spinlocked() Bartosz Golaszewski
2020-02-11 9:19 ` [RESEND PATCH v6 3/7] gpiolib: rework the locking mechanism for lineevent kfifo Bartosz Golaszewski
2020-02-11 9:19 ` [RESEND PATCH v6 4/7] gpiolib: emit a debug message when adding events to a full kfifo Bartosz Golaszewski
2020-02-11 9:19 ` Bartosz Golaszewski [this message]
2020-03-16 16:20 ` [RESEND PATCH v6 5/7] gpiolib: provide a dedicated function for setting lineinfo Geert Uytterhoeven
2020-03-17 13:40 ` Bartosz Golaszewski
2020-02-11 9:19 ` [RESEND PATCH v6 6/7] gpiolib: add new ioctl() for monitoring changes in line info Bartosz Golaszewski
2020-02-12 10:47 ` Linus Walleij
2020-02-12 11:00 ` Bartosz Golaszewski
2020-02-20 15:03 ` Linus Walleij
2020-02-20 15:06 ` Bartosz Golaszewski
2020-02-11 9:19 ` [RESEND PATCH v6 7/7] tools: gpio: implement gpio-watch Bartosz Golaszewski
2020-02-12 10:49 ` [RESEND PATCH v6 0/7] gpiolib: add an ioctl() for monitoring line status changes Linus Walleij
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200211091937.29558-6-brgl@bgdev.pl \
--to=brgl@bgdev.pl \
--cc=andriy.shevchenko@linux.intel.com \
--cc=bgolaszewski@baylibre.com \
--cc=linus.walleij@linaro.org \
--cc=linux-gpio@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=warthog618@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).