Blackfin: bf538: pull gpio/port logic out of core hibernate paths
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>
diff --git a/arch/blackfin/mach-bf538/ext-gpio.c b/arch/blackfin/mach-bf538/ext-gpio.c
index 180b125..471a9b1 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 @@
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