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gpio-sch: Allow for more than 8 lines in the resume well 

The E6xx (TunnelCreek) CPUs have 9 GPIO lines in the resume well. Update
the resume functions to allow for more than 8 GPIO lines, using the core
functions as a template.

Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Darren Hart 2013-03-06 13:49:36 -08:00 committed by Linus Walleij
parent 021304907b
commit 3cbf1822b5
1 changed files with 27 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

37
drivers/gpio/gpio-sch.c
View File

@ -125,13 +125,17 @@ static int sch_gpio_resume_direction_in(struct gpio_chip *gc,
unsigned gpio_num)
{
u8 curr_dirs;
unsigned short offset, bit;
spin_lock(&gpio_lock);
curr_dirs = inb(gpio_ba + RGIO);
offset = RGIO + gpio_num / 8;
bit = gpio_num % 8;
if (!(curr_dirs & (1 << gpio_num)))
outb(curr_dirs | (1 << gpio_num) , gpio_ba + RGIO);
curr_dirs = inb(gpio_ba + offset);
if (!(curr_dirs & (1 << bit)))
outb(curr_dirs | (1 << bit), gpio_ba + offset);
spin_unlock(&gpio_lock);
return 0;
@ -139,22 +143,31 @@ static int sch_gpio_resume_direction_in(struct gpio_chip *gc,
static int sch_gpio_resume_get(struct gpio_chip *gc, unsigned gpio_num)
{
return !!(inb(gpio_ba + RGLV) & (1 << gpio_num));
unsigned short offset, bit;
offset = RGLV + gpio_num / 8;
bit = gpio_num % 8;
return !!(inb(gpio_ba + offset) & (1 << bit));
}
static void sch_gpio_resume_set(struct gpio_chip *gc,
unsigned gpio_num, int val)
{
u8 curr_vals;
unsigned short offset, bit;
spin_lock(&gpio_lock);
curr_vals = inb(gpio_ba + RGLV);
offset = RGLV + gpio_num / 8;
bit = gpio_num % 8;
curr_vals = inb(gpio_ba + offset);
if (val)
outb(curr_vals | (1 << gpio_num), gpio_ba + RGLV);
outb(curr_vals | (1 << bit), gpio_ba + offset);
else
outb((curr_vals & ~(1 << gpio_num)), gpio_ba + RGLV);
outb((curr_vals & ~(1 << bit)), gpio_ba + offset);
spin_unlock(&gpio_lock);
}
@ -163,14 +176,18 @@ static int sch_gpio_resume_direction_out(struct gpio_chip *gc,
unsigned gpio_num, int val)
{
u8 curr_dirs;
unsigned short offset, bit;
sch_gpio_resume_set(gc, gpio_num, val);
offset = RGIO + gpio_num / 8;
bit = gpio_num % 8;
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);
curr_dirs = inb(gpio_ba + offset);
if (curr_dirs & (1 << bit))
outb(curr_dirs & ~(1 << bit), gpio_ba + offset);
spin_unlock(&gpio_lock);
return 0;