Commit b11e9e02 authored by Herbert Valerio Riedel's avatar Herbert Valerio Riedel Committed by Russell King
Browse files

[ARM] Orion: provide GPIO method for enabling hardware assisted blinking 



This is a pre-requisite for implementing proper hardware accelerated
GPIO LED flashing, and since we want proper locking, it's sensible to provide
the orion specific orion_gpio_set_blink() implementation within
mach-orion/gpio.c. The functions orion_gpio_set_blink() and gpio_set_value()
implicitly turn off each others state.

Signed-off-by: default avatarHerbert Valerio Riedel <hvr@gnu.org>
Acked-by: default avatarTzachi Perelstein <tzachi@marvell.com>
Acked-by: default avatarNicolas Pitre <nico@marvell.com>
Acked-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 01af72e4

arch/arm/mach-orion/gpio.c

+19 −0
Original line number Diff line number Diff line
@@ -76,6 +76,7 @@ int gpio_direction_output(unsigned pin, int value) 
		gpio_label[pin] = "?";



	mask = 1 << pin;

	orion_clrbits(GPIO_BLINK_EN, mask);

	if (value)

		orion_setbits(GPIO_OUT, mask);

	else
@@ -107,6 +108,7 @@ void gpio_set_value(unsigned pin, int value) 


	spin_lock_irqsave(&gpio_lock, flags);



	orion_clrbits(GPIO_BLINK_EN, mask);

	if (value)

		orion_setbits(GPIO_OUT, mask);

	else
@@ -116,6 +118,23 @@ void gpio_set_value(unsigned pin, int value) 
}

EXPORT_SYMBOL(gpio_set_value);



void orion_gpio_set_blink(unsigned pin, int blink)

{

	unsigned long flags;

	int mask = 1 << pin;



	spin_lock_irqsave(&gpio_lock, flags);



	orion_clrbits(GPIO_OUT, mask);

	if (blink)

		orion_setbits(GPIO_BLINK_EN, mask);

	else

		orion_clrbits(GPIO_BLINK_EN, mask);



	spin_unlock_irqrestore(&gpio_lock, flags);

}

EXPORT_SYMBOL(orion_gpio_set_blink);



int gpio_request(unsigned pin, const char *label)

{

	int ret = 0;

include/asm-arm/arch-orion/gpio.h

+1 −0
Original line number Diff line number Diff line
@@ -12,6 +12,7 @@ extern int gpio_direction_input(unsigned pin); 
extern int gpio_direction_output(unsigned pin, int value);

extern int gpio_get_value(unsigned pin);

extern void gpio_set_value(unsigned pin, int value);

extern void orion_gpio_set_blink(unsigned pin, int blink);

extern void gpio_display(void);		/* debug */



static inline int gpio_to_irq(int pin)

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