Revision 2d360fcbd851b7f9f8c23b1c30b2f3c060fa43e6 authored by Linus Torvalds on 20 November 2011, 22:33:02 UTC, committed by Linus Torvalds on 20 November 2011, 22:33:02 UTC
* 'pm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: PM / Suspend: Fix bug in suspend statistics update PM / Hibernate: Fix the early termination of test modes PM / shmobile: Fix build of sh7372_pm_init() for CONFIG_PM unset PM Sleep: Do not extend wakeup paths to devices with ignore_children set PM / driver core: disable device's runtime PM during shutdown PM / devfreq: correct Kconfig dependency PM / devfreq: fix use after free in devfreq_remove_device PM / shmobile: Avoid restoring the INTCS state during initialization PM / devfreq: Remove compiler error after irq.h update PM / QoS: Properly use the WARN() macro in dev_pm_qos_add_request() PM / Clocks: Only disable enabled clocks in pm_clk_suspend() ARM: mach-shmobile: sh7372 A3SP no_suspend_console fix PM / shmobile: Don't skip debugging output in pd_power_up()
ext-gpio.c
/*
* GPIOLIB interface for BF538/9 PORT C, D, and E GPIOs
*
* Copyright 2009-2011 Analog Devices Inc.
*
* Licensed under the GPL-2 or later.
*/
#include <linux/module.h>
#include <linux/err.h>
#include <asm/blackfin.h>
#include <asm/gpio.h>
#include <asm/portmux.h>
#define DEFINE_REG(reg, off) \
static inline u16 read_##reg(void __iomem *port) \
{ return bfin_read16(port + off); } \
static inline void write_##reg(void __iomem *port, u16 v) \
{ bfin_write16(port + off, v); }
DEFINE_REG(PORTIO, 0x00)
DEFINE_REG(PORTIO_CLEAR, 0x10)
DEFINE_REG(PORTIO_SET, 0x20)
DEFINE_REG(PORTIO_DIR, 0x40)
DEFINE_REG(PORTIO_INEN, 0x50)
static void __iomem *gpio_chip_to_mmr(struct gpio_chip *chip)
{
switch (chip->base) {
default: /* not really needed, but keeps gcc happy */
case GPIO_PC0: return (void __iomem *)PORTCIO;
case GPIO_PD0: return (void __iomem *)PORTDIO;
case GPIO_PE0: return (void __iomem *)PORTEIO;
}
}
static int bf538_gpio_get_value(struct gpio_chip *chip, unsigned gpio)
{
void __iomem *port = gpio_chip_to_mmr(chip);
return !!(read_PORTIO(port) & (1u << gpio));
}
static void bf538_gpio_set_value(struct gpio_chip *chip, unsigned gpio, int value)
{
void __iomem *port = gpio_chip_to_mmr(chip);
if (value)
write_PORTIO_SET(port, (1u << gpio));
else
write_PORTIO_CLEAR(port, (1u << gpio));
}
static int bf538_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
{
void __iomem *port = gpio_chip_to_mmr(chip);
write_PORTIO_DIR(port, read_PORTIO_DIR(port) & ~(1u << gpio));
write_PORTIO_INEN(port, read_PORTIO_INEN(port) | (1u << gpio));
return 0;
}
static int bf538_gpio_direction_output(struct gpio_chip *chip, unsigned gpio, int value)
{
void __iomem *port = gpio_chip_to_mmr(chip);
write_PORTIO_INEN(port, read_PORTIO_INEN(port) & ~(1u << gpio));
bf538_gpio_set_value(port, gpio, value);
write_PORTIO_DIR(port, read_PORTIO_DIR(port) | (1u << gpio));
return 0;
}
static int bf538_gpio_request(struct gpio_chip *chip, unsigned gpio)
{
return bfin_special_gpio_request(chip->base + gpio, chip->label);
}
static void bf538_gpio_free(struct gpio_chip *chip, unsigned gpio)
{
return bfin_special_gpio_free(chip->base + gpio);
}
/* We don't set the irq fields as these banks cannot generate interrupts */
static struct gpio_chip bf538_portc_chip = {
.label = "GPIO-PC",
.direction_input = bf538_gpio_direction_input,
.get = bf538_gpio_get_value,
.direction_output = bf538_gpio_direction_output,
.set = bf538_gpio_set_value,
.request = bf538_gpio_request,
.free = bf538_gpio_free,
.base = GPIO_PC0,
.ngpio = GPIO_PC9 - GPIO_PC0 + 1,
};
static struct gpio_chip bf538_portd_chip = {
.label = "GPIO-PD",
.direction_input = bf538_gpio_direction_input,
.get = bf538_gpio_get_value,
.direction_output = bf538_gpio_direction_output,
.set = bf538_gpio_set_value,
.request = bf538_gpio_request,
.free = bf538_gpio_free,
.base = GPIO_PD0,
.ngpio = GPIO_PD13 - GPIO_PD0 + 1,
};
static struct gpio_chip bf538_porte_chip = {
.label = "GPIO-PE",
.direction_input = bf538_gpio_direction_input,
.get = bf538_gpio_get_value,
.direction_output = bf538_gpio_direction_output,
.set = bf538_gpio_set_value,
.request = bf538_gpio_request,
.free = bf538_gpio_free,
.base = GPIO_PE0,
.ngpio = GPIO_PE15 - GPIO_PE0 + 1,
};
static int __init bf538_extgpio_setup(void)
{
return gpiochip_add(&bf538_portc_chip) |
gpiochip_add(&bf538_portd_chip) |
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
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