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ARM: OMAP: switch to gpio_direction_output

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More conversion to the standard GPIO interfaces:  stop using
omap_set_gpio_direction() entirely, and switch over to the
gpio_direction_output() call.

Note that because gpio_direction_output() includes the initial
value, this change isn't quite transparent.

 - For the call sites which defined an initial value either
   before or after setting the direction, that value was used.

   When that value was previously assigned afterwards, this
   could eliminate a brief output glitch ... and possibly
   change behavior.  In a few cases (LCDs) several values
   were assigned together ... those were re-arranged to match
   the explicit sequence provided.

 - Some call sites didn't define such a value; so I chose an
   initial "off/reset" value that seemed to default to "off".

In short, files touched by this patch might notice some small
changes in startup behavior (with trivial fixes).

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
David Brownell
2008-12-10 17:35:26 -08:00
committed by Tony Lindgren
parent 40e3925ba1
commit e918edf7c2
8 changed files with 11 additions and 36 deletions
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14
arch/arm/plat-omap/gpio.c
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@@ -333,19 +333,6 @@ static void _set_gpio_direction(struct gpio_bank *bank, int gpio, int is_input)
__raw_writel(l, reg);
}
void omap_set_gpio_direction(int gpio, int is_input)
{
struct gpio_bank *bank;
unsigned long flags;
if (check_gpio(gpio) < 0)
return;
bank = get_gpio_bank(gpio);
spin_lock_irqsave(&bank->lock, flags);
_set_gpio_direction(bank, get_gpio_index(gpio), is_input);
spin_unlock_irqrestore(&bank->lock, flags);
}
static void _set_gpio_dataout(struct gpio_bank *bank, int gpio, int enable)
{
void __iomem *reg = bank->base;
@@ -1741,7 +1728,6 @@ static int __init omap_gpio_sysinit(void)
EXPORT_SYMBOL(omap_request_gpio);
EXPORT_SYMBOL(omap_free_gpio);
EXPORT_SYMBOL(omap_set_gpio_direction);
arch_initcall(omap_gpio_sysinit);