From: Alexandre Courbot <acourbot@nvidia.com>
To: Grant Likely <grant.likely@secretlab.ca>,
Linus Walleij <linus.walleij@linaro.org>,
Arnd Bergmann <arnd@arndb.de>
Cc: linux-arch@vger.kernel.org, gnurou@gmail.com,
Alexandre Courbot <acourbot@nvidia.com>,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH 3/9] gpiolib: use gpio_chips list in gpiochip_find
Date: Sun, 3 Feb 2013 01:29:26 +0900 [thread overview]
Message-ID: <1359822572-26009-5-git-send-email-acourbot@nvidia.com> (raw)
In-Reply-To: <1359822572-26009-1-git-send-email-acourbot@nvidia.com>
Using the GPIO chips list is much faster than parsing the entire GPIO
number space.
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
---
drivers/gpio/gpiolib.c | 17 +++++++----------
1 file changed, 7 insertions(+), 10 deletions(-)
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 4ceb4a7..92f9ee4 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -1194,20 +1194,17 @@ struct gpio_chip *gpiochip_find(void *data,
int (*match)(struct gpio_chip *chip,
void *data))
{
- struct gpio_chip *chip = NULL;
+ struct gpio_chip *chip;
unsigned long flags;
- int i;
spin_lock_irqsave(&gpio_lock, flags);
- for (i = 0; i < ARCH_NR_GPIOS; i++) {
- if (!gpio_desc[i].chip)
- continue;
-
- if (match(gpio_desc[i].chip, data)) {
- chip = gpio_desc[i].chip;
+ list_for_each_entry(chip, &gpio_chips, list)
+ if (match(chip, data))
break;
- }
- }
+
+ /* No match? */
+ if (&chip->list == &gpio_chips)
+ chip = NULL;
spin_unlock_irqrestore(&gpio_lock, flags);
return chip;
--
1.8.1.1
WARNING: multiple messages have this Message-ID (diff)
From: Alexandre Courbot <acourbot@nvidia.com>
To: Grant Likely <grant.likely@secretlab.ca>,
Linus Walleij <linus.walleij@linaro.org>,
Arnd Bergmann <arnd@arndb.de>
Cc: linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, gnurou@gmail.com,
Alexandre Courbot <acourbot@nvidia.com>
Subject: [PATCH 3/9] gpiolib: use gpio_chips list in gpiochip_find
Date: Sun, 3 Feb 2013 01:29:26 +0900 [thread overview]
Message-ID: <1359822572-26009-5-git-send-email-acourbot@nvidia.com> (raw)
Message-ID: <20130202162926.F69Br9yi-J3UdhlRS66TOWI5geuG6zLADuAP_-zGICg@z> (raw)
In-Reply-To: <1359822572-26009-1-git-send-email-acourbot@nvidia.com>
Using the GPIO chips list is much faster than parsing the entire GPIO
number space.
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
---
drivers/gpio/gpiolib.c | 17 +++++++----------
1 file changed, 7 insertions(+), 10 deletions(-)
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 4ceb4a7..92f9ee4 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -1194,20 +1194,17 @@ struct gpio_chip *gpiochip_find(void *data,
int (*match)(struct gpio_chip *chip,
void *data))
{
- struct gpio_chip *chip = NULL;
+ struct gpio_chip *chip;
unsigned long flags;
- int i;
spin_lock_irqsave(&gpio_lock, flags);
- for (i = 0; i < ARCH_NR_GPIOS; i++) {
- if (!gpio_desc[i].chip)
- continue;
-
- if (match(gpio_desc[i].chip, data)) {
- chip = gpio_desc[i].chip;
+ list_for_each_entry(chip, &gpio_chips, list)
+ if (match(chip, data))
break;
- }
- }
+
+ /* No match? */
+ if (&chip->list == &gpio_chips)
+ chip = NULL;
spin_unlock_irqrestore(&gpio_lock, flags);
return chip;
--
1.8.1.1
next prev parent reply other threads:[~2013-02-02 16:29 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-02 16:29 [PATCH 0/9] gpiolib: remove gpio_desc[] static array Alexandre Courbot
2013-02-02 16:29 ` Alexandre Courbot
2013-02-02 16:29 ` [PATCH 1/9] gpiolib: link all gpio_chips using a list Alexandre Courbot
2013-02-02 16:29 ` Alexandre Courbot
2013-02-05 17:00 ` Linus Walleij
2013-02-09 9:20 ` Grant Likely
2013-02-09 9:20 ` Grant Likely
2013-02-02 16:29 ` [PATCH 2/9] gpiolib: use gpio_chips list in gpiolib_sysfs_init Alexandre Courbot
2013-02-02 16:29 ` Alexandre Courbot
2013-02-05 17:04 ` Linus Walleij
2013-02-09 9:22 ` Grant Likely
2013-02-09 9:22 ` Grant Likely
2013-02-02 16:29 ` Alexandre Courbot [this message]
2013-02-02 16:29 ` [PATCH 3/9] gpiolib: use gpio_chips list in gpiochip_find Alexandre Courbot
2013-02-05 17:05 ` Linus Walleij
2013-02-09 9:25 ` Grant Likely
2013-02-09 9:25 ` Grant Likely
2013-02-02 16:29 ` [PATCH 4/9] gpiolib: use gpio_chips list in sysfs ops Alexandre Courbot
2013-02-02 16:29 ` Alexandre Courbot
2013-02-05 17:15 ` Linus Walleij
2013-02-05 17:15 ` Linus Walleij
2013-02-09 9:37 ` Grant Likely
2013-02-09 9:37 ` Grant Likely
2013-02-09 13:53 ` Alexandre Courbot
2013-02-02 16:29 ` [PATCH 5/9] gpiolib: use gpio_chips list in gpiochip_find_base Alexandre Courbot
2013-02-02 16:29 ` Alexandre Courbot
2013-02-05 17:21 ` Linus Walleij
2013-02-06 4:48 ` Alex Courbot
2013-02-09 9:47 ` Grant Likely
2013-02-09 9:47 ` Grant Likely
2013-02-02 16:29 ` [PATCH 6/9] gpiolib: use descriptors internally Alexandre Courbot
2013-02-02 16:29 ` Alexandre Courbot
2013-02-05 17:53 ` Linus Walleij
2013-02-07 6:57 ` Alexandre Courbot
2013-02-09 9:17 ` Grant Likely
2013-02-09 9:17 ` Grant Likely
2013-02-11 14:09 ` Linus Walleij
2013-02-11 15:40 ` Paul Mundt
2013-02-11 15:40 ` Paul Mundt
2013-02-11 17:39 ` Stephen Warren
2013-02-12 12:29 ` Linus Walleij
2013-02-12 15:59 ` Paul Mundt
2013-02-12 17:18 ` Arnd Bergmann
2013-02-09 13:11 ` Grant Likely
2013-02-09 13:11 ` Grant Likely
2013-02-09 14:15 ` Alexandre Courbot
2013-02-09 13:24 ` Grant Likely
2013-02-09 13:24 ` Grant Likely
2013-02-09 14:18 ` Alexandre Courbot
2013-02-02 16:29 ` [PATCH 7/9] gpiolib: let gpio_chip reference its descriptors Alexandre Courbot
2013-02-05 18:00 ` Linus Walleij
2013-02-09 13:28 ` Grant Likely
2013-02-02 16:29 ` [PATCH 8/9] gpiolib: use gpio_chips list in gpio_to_desc Alexandre Courbot
2013-02-05 18:01 ` Linus Walleij
2013-02-05 18:01 ` Linus Walleij
2013-02-09 9:58 ` Grant Likely
2013-02-09 9:58 ` Grant Likely
2013-02-09 14:21 ` Alexandre Courbot
2013-02-09 14:21 ` Alexandre Courbot
2013-02-09 14:37 ` Grant Likely
2013-02-02 16:29 ` [PATCH 9/9] gpiolib: dynamically allocate descriptors array Alexandre Courbot
2013-02-02 16:29 ` Alexandre Courbot
2013-02-05 18:02 ` Linus Walleij
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