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Date: Sun, 12 Feb 2012 18:45:58 +0200
From: Denis Turischev <denis@...pulab.co.il>
To: Grant Likely <grant.likely@...retlab.ca>
CC: Linus Walleij <linus.walleij@...ricsson.com>,
linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] gpio: optimise gpio functionality in gpio-sch.c
GPIO logic of core powered and resume powered gpios on Intel SCH/Tunnel Creek
is the same, make wrappers for them with appropriate base registers.
Signed-off-by: Denis Turischev <denis@...pulab.co.il>
---
drivers/gpio/gpio-sch.c | 84 +++++++++++++++++++++-------------------------
1 files changed, 38 insertions(+), 46 deletions(-)
diff --git a/drivers/gpio/gpio-sch.c b/drivers/gpio/gpio-sch.c
index f287016..8377d28 100644
--- a/drivers/gpio/gpio-sch.c
+++ b/drivers/gpio/gpio-sch.c
@@ -41,14 +41,14 @@ static DEFINE_SPINLOCK(gpio_lock);
static unsigned short gpio_ba;
-static int sch_gpio_core_direction_in(struct gpio_chip *gc, unsigned gpio_num)
+static void sch_gpio_direction_in(unsigned ioreg, unsigned gpio_num)
{
u8 curr_dirs;
unsigned short offset, bit;
spin_lock(&gpio_lock);
- offset = CGIO + gpio_num / 8;
+ offset = ioreg + gpio_num / 8;
bit = gpio_num % 8;
curr_dirs = inb(gpio_ba + offset);
@@ -57,29 +57,28 @@ static int sch_gpio_core_direction_in(struct gpio_chip *gc, unsigned gpio_num)
outb(curr_dirs | (1 << bit), gpio_ba + offset);
spin_unlock(&gpio_lock);
- return 0;
}
-static int sch_gpio_core_get(struct gpio_chip *gc, unsigned gpio_num)
+static int sch_gpio_get(unsigned lvreg, unsigned gpio_num)
{
int res;
unsigned short offset, bit;
- offset = CGLV + gpio_num / 8;
+ offset = lvreg + gpio_num / 8;
bit = gpio_num % 8;
res = !!(inb(gpio_ba + offset) & (1 << bit));
return res;
}
-static void sch_gpio_core_set(struct gpio_chip *gc, unsigned gpio_num, int val)
+static void sch_gpio_set(unsigned lvreg, unsigned gpio_num, int val)
{
u8 curr_vals;
unsigned short offset, bit;
spin_lock(&gpio_lock);
- offset = CGLV + gpio_num / 8;
+ offset = lvreg + gpio_num / 8;
bit = gpio_num % 8;
curr_vals = inb(gpio_ba + offset);
@@ -91,17 +90,14 @@ static void sch_gpio_core_set(struct gpio_chip *gc, unsigned gpio_num, int val)
spin_unlock(&gpio_lock);
}
-static int sch_gpio_core_direction_out(struct gpio_chip *gc,
- unsigned gpio_num, int val)
+static void sch_gpio_direction_out(unsigned ioreg, unsigned gpio_num)
{
u8 curr_dirs;
unsigned short offset, bit;
- sch_gpio_core_set(gc, gpio_num, val);
-
spin_lock(&gpio_lock);
- offset = CGIO + gpio_num / 8;
+ offset = ioreg + gpio_num / 8;
bit = gpio_num % 8;
curr_dirs = inb(gpio_ba + offset);
@@ -109,6 +105,30 @@ static int sch_gpio_core_direction_out(struct gpio_chip *gc,
outb(curr_dirs & ~(1 << bit), gpio_ba + offset);
spin_unlock(&gpio_lock);
+}
+
+static int sch_gpio_core_direction_in(struct gpio_chip *gc, unsigned gpio_num)
+{
+ sch_gpio_direction_in(CGIO, gpio_num);
+ return 0;
+}
+
+static int sch_gpio_core_get(struct gpio_chip *gc, unsigned gpio_num)
+{
+ return sch_gpio_get(CGLV, gpio_num);
+}
+
+static void sch_gpio_core_set(struct gpio_chip *gc, unsigned gpio_num, int val)
+{
+ sch_gpio_set(CGLV, gpio_num, val);
+}
+
+static int sch_gpio_core_direction_out(struct gpio_chip *gc,
+ unsigned gpio_num, int val)
+{
+ sch_gpio_direction_out(CGIO, gpio_num);
+ sch_gpio_set(CGLV, gpio_num, val);
+
return 0;
}
@@ -122,57 +142,29 @@ static struct gpio_chip sch_gpio_core = {
};
static int sch_gpio_resume_direction_in(struct gpio_chip *gc,
- unsigned gpio_num)
+ unsigned gpio_num)
{
- u8 curr_dirs;
-
- spin_lock(&gpio_lock);
-
- curr_dirs = inb(gpio_ba + RGIO);
-
- if (!(curr_dirs & (1 << gpio_num)))
- outb(curr_dirs | (1 << gpio_num) , gpio_ba + RGIO);
-
- spin_unlock(&gpio_lock);
+ sch_gpio_direction_in(RGIO, gpio_num);
return 0;
}
static int sch_gpio_resume_get(struct gpio_chip *gc, unsigned gpio_num)
{
- return !!(inb(gpio_ba + RGLV) & (1 << gpio_num));
+ return sch_gpio_get(RGLV, gpio_num);
}
static void sch_gpio_resume_set(struct gpio_chip *gc,
unsigned gpio_num, int val)
{
- u8 curr_vals;
-
- spin_lock(&gpio_lock);
-
- curr_vals = inb(gpio_ba + RGLV);
-
- if (val)
- outb(curr_vals | (1 << gpio_num), gpio_ba + RGLV);
- else
- outb((curr_vals & ~(1 << gpio_num)), gpio_ba + RGLV);
-
- spin_unlock(&gpio_lock);
+ sch_gpio_set(RGLV, gpio_num, val);
}
static int sch_gpio_resume_direction_out(struct gpio_chip *gc,
unsigned gpio_num, int val)
{
- u8 curr_dirs;
-
- sch_gpio_resume_set(gc, gpio_num, val);
-
- spin_lock(&gpio_lock);
-
- curr_dirs = inb(gpio_ba + RGIO);
- if (curr_dirs & (1 << gpio_num))
- outb(curr_dirs & ~(1 << gpio_num), gpio_ba + RGIO);
+ sch_gpio_direction_out(RGIO, gpio_num);
+ sch_gpio_set(RGLV, gpio_num, val);
- spin_unlock(&gpio_lock);
return 0;
}
--
1.7.5.4
--
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