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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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2
arch/arm/mach-omap1/board-h2.c
View File

@ -439,7 +439,7 @@ static void __init h2_init(void)
#if defined(CONFIG_OMAP_IR) || defined(CONFIG_OMAP_IR_MODULE)
omap_writel(omap_readl(FUNC_MUX_CTRL_A) | 7, FUNC_MUX_CTRL_A);
if (!(omap_request_gpio(H2_IRDA_FIRSEL_GPIO_PIN))) {
omap_set_gpio_direction(H2_IRDA_FIRSEL_GPIO_PIN, 0);
gpio_direction_output(H2_IRDA_FIRSEL_GPIO_PIN, 0);
h2_irda_data.transceiver_mode = h2_transceiver_mode;
}
#endif

3
arch/arm/mach-omap1/board-palmz71.c
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@ -323,8 +323,7 @@ palmz71_gpio_setup(int early)
{
if (early) {
/* Only set GPIO1 so we have a working serial */
gpio_set_value(1, 1);
omap_set_gpio_direction(1, 0);
gpio_direction_output(1, 1);
} else {
/* Set MMC/SD host WP pin as input */
if (omap_request_gpio(PALMZ71_MMC_WP_GPIO)) {

11
arch/arm/mach-omap1/board-sx1.c
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@ -436,14 +436,9 @@ static void __init omap_sx1_init(void)
omap_request_gpio(1); /* A_IRDA_OFF */
omap_request_gpio(11); /* A_SWITCH */
omap_request_gpio(15); /* A_USB_ON */
omap_set_gpio_direction(1, 0);/* gpio1 -> output */
omap_set_gpio_direction(11, 0);/* gpio11 -> output */
omap_set_gpio_direction(15, 0);/* gpio15 -> output */
/* set GPIO data */
gpio_set_value(1, 1);/*A_IRDA_OFF = 1 */
gpio_set_value(11, 0);/*A_SWITCH = 0 */
gpio_set_value(15, 0);/*A_USB_ON = 0 */
gpio_direction_output(1, 1); /*A_IRDA_OFF = 1 */
gpio_direction_output(11, 0); /*A_SWITCH = 0 */
gpio_direction_output(15, 0); /*A_USB_ON = 0 */
}
/*----------------------------------------*/
static void __init omap_sx1_init_irq(void)

9
arch/arm/mach-omap1/board-voiceblue.c
View File

@ -171,8 +171,7 @@ static void __init voiceblue_init(void)
omap_request_gpio(0);
/* smc91x reset */
omap_request_gpio(7);
omap_set_gpio_direction(7, 0);
gpio_set_value(7, 1);
gpio_direction_output(7, 1);
udelay(2); /* wait at least 100ns */
gpio_set_value(7, 0);
mdelay(50); /* 50ms until PHY ready */
@ -180,8 +179,7 @@ static void __init voiceblue_init(void)
omap_request_gpio(8);
/* 16C554 reset*/
omap_request_gpio(6);
omap_set_gpio_direction(6, 0);
gpio_set_value(6, 0);
gpio_direction_output(6, 0);
/* 16C554 interrupt pins */
omap_request_gpio(12);
omap_request_gpio(13);
@ -244,8 +242,7 @@ static int wdt_gpio_state;
void voiceblue_wdt_enable(void)
{
omap_set_gpio_direction(0, 0);
gpio_set_value(0, 0);
gpio_direction_output(0, 0);
gpio_set_value(0, 1);
gpio_set_value(0, 0);
wdt_gpio_state = 0;

4
arch/arm/mach-omap1/leds.c
View File

@ -48,13 +48,13 @@ omap_leds_init(void)
*/
omap_cfg_reg(P18_1610_GPIO3);
if (omap_request_gpio(3) == 0)
omap_set_gpio_direction(3, 0);
gpio_direction_output(3, 1);
else
printk(KERN_WARNING "LED: can't get GPIO3/red?\n");
omap_cfg_reg(MPUIO4);
if (omap_request_gpio(OMAP_MPUIO(4)) == 0)
omap_set_gpio_direction(OMAP_MPUIO(4), 0);
gpio_direction_output(OMAP_MPUIO(4), 1);
else
printk(KERN_WARNING "LED: can't get MPUIO4/green?\n");
}

3
arch/arm/mach-omap2/board-apollon.c
View File

@ -360,8 +360,7 @@ static void __init apollon_usb_init(void)
/* DEVICE_SUSPEND */
omap_cfg_reg(P21_242X_GPIO12);
omap_request_gpio(12);
omap_set_gpio_direction(12, 0); /* OUT */
gpio_set_value(12, 0);
gpio_direction_output(12, 0);
}
static void __init omap_apollon_init(void)

14
arch/arm/plat-omap/gpio.c
View File

@ -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);

1
arch/arm/plat-omap/include/mach/gpio.h
View File

@ -73,7 +73,6 @@
extern int omap_gpio_init(void); /* Call from board init only */
extern int omap_request_gpio(int gpio);
extern void omap_free_gpio(int gpio);
extern void omap_set_gpio_direction(int gpio, int is_input);
extern void omap2_gpio_prepare_for_retention(void);
extern void omap2_gpio_resume_after_retention(void);
extern void omap_set_gpio_debounce(int gpio, int enable);