diff options
Diffstat (limited to 'arch/blackfin/mach-bf538/ext-gpio.c')
| -rw-r--r-- | arch/blackfin/mach-bf538/ext-gpio.c | 37 |
1 files changed, 36 insertions, 1 deletions
diff --git a/arch/blackfin/mach-bf538/ext-gpio.c b/arch/blackfin/mach-bf538/ext-gpio.c index 180b1252679..471a9b184d5 100644 --- a/arch/blackfin/mach-bf538/ext-gpio.c +++ b/arch/blackfin/mach-bf538/ext-gpio.c @@ -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 |