diff mbox

[042/182] gpio: mpc8xxx: use gpiochip data pointer

Message ID 1449667117-31740-1-git-send-email-linus.walleij@linaro.org
State Accepted
Commit 709d71a17c3383eca79ce9142b8d4ddc0f8028d0
Headers show

Commit Message

Linus Walleij Dec. 9, 2015, 1:18 p.m. UTC 
This makes the driver use the data pointer added to the gpio_chip
to store a pointer to the state container instead of relying on
container_of().

Cc: Alexander Stein <alexander.stein@systec-electronic.com>
Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

---
 drivers/gpio/gpio-mpc8xxx.c | 23 ++++++++---------------
 1 file changed, 8 insertions(+), 15 deletions(-)

-- 
2.4.3

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Comments

Linus Walleij Dec. 14, 2015, 9:25 a.m. UTC | #1 
On Wed, Dec 9, 2015 at 8:19 PM, Uwe Kleine-König
<u.kleine-koenig@pengutronix.de> wrote:
> On Wed, Dec 09, 2015 at 02:18:37PM +0100, Linus Walleij wrote:

>> This makes the driver use the data pointer added to the gpio_chip

>> to store a pointer to the state container instead of relying on

>> container_of().

>

> I wonder why your patch is an improvement. I imagine that container_of

> is cheaper in instructions and memory/cache accesses.


This is described in patch 000/182.

I'm sorry I couldn't put everyone on direct CC for that, but the mailing lists
complain if I have too many recipients, so damned if I do, damned if I don't :(
http://marc.info/?l=linux-gpio&m=144966662402660&w=2

Yours,
Linus Walleij
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diff mbox

Patch

diff --git a/drivers/gpio/gpio-mpc8xxx.c b/drivers/gpio/gpio-mpc8xxx.c
index 48ef368347ab..34b6ebe63638 100644
--- a/drivers/gpio/gpio-mpc8xxx.c
+++ b/drivers/gpio/gpio-mpc8xxx.c
@@ -49,15 +49,9 @@  static inline u32 mpc8xxx_gpio2mask(unsigned int gpio)
 	return 1u << (MPC8XXX_GPIO_PINS - 1 - gpio);
 }
 
-static inline struct mpc8xxx_gpio_chip *
-to_mpc8xxx_gpio_chip(struct of_mm_gpio_chip *mm)
-{
-	return container_of(mm, struct mpc8xxx_gpio_chip, mm_gc);
-}
-
 static void mpc8xxx_gpio_save_regs(struct of_mm_gpio_chip *mm)
 {
-	struct mpc8xxx_gpio_chip *mpc8xxx_gc = to_mpc8xxx_gpio_chip(mm);
+	struct mpc8xxx_gpio_chip *mpc8xxx_gc = gpiochip_get_data(&mm->gc);
 
 	mpc8xxx_gc->data = in_be32(mm->regs + GPIO_DAT);
 }
@@ -71,7 +65,7 @@  static int mpc8572_gpio_get(struct gpio_chip *gc, unsigned int gpio)
 {
 	u32 val;
 	struct of_mm_gpio_chip *mm = to_of_mm_gpio_chip(gc);
-	struct mpc8xxx_gpio_chip *mpc8xxx_gc = to_mpc8xxx_gpio_chip(mm);
+	struct mpc8xxx_gpio_chip *mpc8xxx_gc = gpiochip_get_data(gc);
 	u32 out_mask, out_shadow;
 
 	out_mask = in_be32(mm->regs + GPIO_DIR);
@@ -92,7 +86,7 @@  static int mpc8xxx_gpio_get(struct gpio_chip *gc, unsigned int gpio)
 static void mpc8xxx_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val)
 {
 	struct of_mm_gpio_chip *mm = to_of_mm_gpio_chip(gc);
-	struct mpc8xxx_gpio_chip *mpc8xxx_gc = to_mpc8xxx_gpio_chip(mm);
+	struct mpc8xxx_gpio_chip *mpc8xxx_gc = gpiochip_get_data(gc);
 	unsigned long flags;
 
 	raw_spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
@@ -111,7 +105,7 @@  static void mpc8xxx_gpio_set_multiple(struct gpio_chip *gc,
 				      unsigned long *mask, unsigned long *bits)
 {
 	struct of_mm_gpio_chip *mm = to_of_mm_gpio_chip(gc);
-	struct mpc8xxx_gpio_chip *mpc8xxx_gc = to_mpc8xxx_gpio_chip(mm);
+	struct mpc8xxx_gpio_chip *mpc8xxx_gc = gpiochip_get_data(gc);
 	unsigned long flags;
 	int i;
 
@@ -136,7 +130,7 @@  static void mpc8xxx_gpio_set_multiple(struct gpio_chip *gc,
 static int mpc8xxx_gpio_dir_in(struct gpio_chip *gc, unsigned int gpio)
 {
 	struct of_mm_gpio_chip *mm = to_of_mm_gpio_chip(gc);
-	struct mpc8xxx_gpio_chip *mpc8xxx_gc = to_mpc8xxx_gpio_chip(mm);
+	struct mpc8xxx_gpio_chip *mpc8xxx_gc = gpiochip_get_data(gc);
 	unsigned long flags;
 
 	raw_spin_lock_irqsave(&mpc8xxx_gc->lock, flags);
@@ -151,7 +145,7 @@  static int mpc8xxx_gpio_dir_in(struct gpio_chip *gc, unsigned int gpio)
 static int mpc8xxx_gpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val)
 {
 	struct of_mm_gpio_chip *mm = to_of_mm_gpio_chip(gc);
-	struct mpc8xxx_gpio_chip *mpc8xxx_gc = to_mpc8xxx_gpio_chip(mm);
+	struct mpc8xxx_gpio_chip *mpc8xxx_gc = gpiochip_get_data(gc);
 	unsigned long flags;
 
 	mpc8xxx_gpio_set(gc, gpio, val);
@@ -185,8 +179,7 @@  static int mpc5125_gpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val
 
 static int mpc8xxx_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
 {
-	struct of_mm_gpio_chip *mm = to_of_mm_gpio_chip(gc);
-	struct mpc8xxx_gpio_chip *mpc8xxx_gc = to_mpc8xxx_gpio_chip(mm);
+	struct mpc8xxx_gpio_chip *mpc8xxx_gc = gpiochip_get_data(gc);
 
 	if (mpc8xxx_gc->irq && offset < MPC8XXX_GPIO_PINS)
 		return irq_create_mapping(mpc8xxx_gc->irq, offset);
@@ -417,7 +410,7 @@  static int mpc8xxx_probe(struct platform_device *pdev)
 	gc->set_multiple = mpc8xxx_gpio_set_multiple;
 	gc->to_irq = mpc8xxx_gpio_to_irq;
 
-	ret = of_mm_gpiochip_add(np, mm_gc);
+	ret = of_mm_gpiochip_add_data(np, mm_gc, mpc8xxx_gc);
 	if (ret)
 		return ret;