[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: Herbert Valerio Riedel <hvr@gnu.org> Acked-by: Tzachi Perelstein <tzachi@marvell.com> Acked-by: Nicolas Pitre <nico@marvell.com> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
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2 changed files with 20 additions and 0 deletions
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@ -76,6 +76,7 @@ int gpio_direction_output(unsigned pin, int value)
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gpio_label[pin] = "?";
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mask = 1 << pin;
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orion_clrbits(GPIO_BLINK_EN, mask);
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if (value)
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orion_setbits(GPIO_OUT, mask);
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else
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@ -107,6 +108,7 @@ void gpio_set_value(unsigned pin, int value)
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spin_lock_irqsave(&gpio_lock, flags);
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orion_clrbits(GPIO_BLINK_EN, mask);
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if (value)
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orion_setbits(GPIO_OUT, mask);
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else
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@ -116,6 +118,23 @@ void gpio_set_value(unsigned pin, int value)
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}
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EXPORT_SYMBOL(gpio_set_value);
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void orion_gpio_set_blink(unsigned pin, int blink)
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{
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unsigned long flags;
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int mask = 1 << pin;
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spin_lock_irqsave(&gpio_lock, flags);
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orion_clrbits(GPIO_OUT, mask);
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if (blink)
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orion_setbits(GPIO_BLINK_EN, mask);
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else
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orion_clrbits(GPIO_BLINK_EN, mask);
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spin_unlock_irqrestore(&gpio_lock, flags);
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}
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EXPORT_SYMBOL(orion_gpio_set_blink);
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int gpio_request(unsigned pin, const char *label)
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{
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int ret = 0;
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@ -12,6 +12,7 @@ extern int gpio_direction_input(unsigned pin);
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extern int gpio_direction_output(unsigned pin, int value);
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extern int gpio_get_value(unsigned pin);
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extern void gpio_set_value(unsigned pin, int value);
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extern void orion_gpio_set_blink(unsigned pin, int blink);
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extern void gpio_display(void); /* debug */
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static inline int gpio_to_irq(int pin)
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