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Blackfin: bf538: pull gpio/port logic out of core hibernate paths

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Re-architect how we save/restore the gpio/port logic that only pertains
to bf538/bf539 parts by pulling it out of the core code paths and pushing
it out to bf538-specific locations.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Mike Frysinger
2011-06-27 14:46:14 -04:00
parent eed7b83658
commit 9466a0510a
5 changed files with 65 additions and 36 deletions
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37
arch/blackfin/mach-bf538/ext-gpio.c
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@@ -1,7 +1,7 @@
/*
* GPIOLIB interface for BF538/9 PORT C, D, and E GPIOs
*
* Copyright 2009 Analog Devices Inc.
* Copyright 2009-2011 Analog Devices Inc.
*
* Licensed under the GPL-2 or later.
*/
@@ -121,3 +121,38 @@ static int __init bf538_extgpio_setup(void)
gpiochip_add(&bf538_porte_chip);
}
arch_initcall(bf538_extgpio_setup);
#ifdef CONFIG_PM
static struct {
u16 data, dir, inen;
} gpio_bank_saved[3];
static void __iomem * const port_bases[3] = {
(void *)PORTCIO,
(void *)PORTDIO,
(void *)PORTEIO,
};
void bfin_special_gpio_pm_hibernate_suspend(void)
{
int i;
for (i = 0; i < ARRAY_SIZE(port_bases); ++i) {
gpio_bank_saved[i].data = read_PORTIO(port_bases[i]);
gpio_bank_saved[i].inen = read_PORTIO_INEN(port_bases[i]);
gpio_bank_saved[i].dir = read_PORTIO_DIR(port_bases[i]);
}
}
void bfin_special_gpio_pm_hibernate_restore(void)
{
int i;
for (i = 0; i < ARRAY_SIZE(port_bases); ++i) {
write_PORTIO_INEN(port_bases[i], gpio_bank_saved[i].inen);
write_PORTIO_SET(port_bases[i],
gpio_bank_saved[i].data & gpio_bank_saved[i].dir);
write_PORTIO_DIR(port_bases[i], gpio_bank_saved[i].dir);
}
}
#endif