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-rw-r--r--drivers/gpio/Makefile1
-rw-r--r--drivers/gpio/gpio-exynos4.c29
-rw-r--r--drivers/gpio/gpio-nomadik.c40
-rw-r--r--drivers/gpio/gpio-omap.c23
-rw-r--r--drivers/gpio/gpio-tegra.c441
5 files changed, 508 insertions, 26 deletions
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 68e3bfd..0fbdd75 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -43,6 +43,7 @@ obj-$(CONFIG_GPIO_SCH) += gpio-sch.o
obj-$(CONFIG_GPIO_STMPE) += gpio-stmpe.o
obj-$(CONFIG_GPIO_SX150X) += gpio-sx150x.o
obj-$(CONFIG_GPIO_TC3589X) += gpio-tc3589x.o
+obj-$(CONFIG_ARCH_TEGRA) += gpio-tegra.o
obj-$(CONFIG_GPIO_TIMBERDALE) += gpio-timberdale.o
obj-$(CONFIG_GPIO_TPS65910) += gpio-tps65910.o
obj-$(CONFIG_GPIO_TWL4030) += gpio-twl4030.o
diff --git a/drivers/gpio/gpio-exynos4.c b/drivers/gpio/gpio-exynos4.c
index 6093a14..d24b337 100644
--- a/drivers/gpio/gpio-exynos4.c
+++ b/drivers/gpio/gpio-exynos4.c
@@ -20,16 +20,37 @@
#include <plat/gpio-cfg.h>
#include <plat/gpio-cfg-helpers.h>
+int s3c_gpio_setpull_exynos4(struct s3c_gpio_chip *chip,
+ unsigned int off, s3c_gpio_pull_t pull)
+{
+ if (pull == S3C_GPIO_PULL_UP)
+ pull = 3;
+
+ return s3c_gpio_setpull_updown(chip, off, pull);
+}
+
+s3c_gpio_pull_t s3c_gpio_getpull_exynos4(struct s3c_gpio_chip *chip,
+ unsigned int off)
+{
+ s3c_gpio_pull_t pull;
+
+ pull = s3c_gpio_getpull_updown(chip, off);
+ if (pull == 3)
+ pull = S3C_GPIO_PULL_UP;
+
+ return pull;
+}
+
static struct s3c_gpio_cfg gpio_cfg = {
.set_config = s3c_gpio_setcfg_s3c64xx_4bit,
- .set_pull = s3c_gpio_setpull_updown,
- .get_pull = s3c_gpio_getpull_updown,
+ .set_pull = s3c_gpio_setpull_exynos4,
+ .get_pull = s3c_gpio_getpull_exynos4,
};
static struct s3c_gpio_cfg gpio_cfg_noint = {
.set_config = s3c_gpio_setcfg_s3c64xx_4bit,
- .set_pull = s3c_gpio_setpull_updown,
- .get_pull = s3c_gpio_getpull_updown,
+ .set_pull = s3c_gpio_setpull_exynos4,
+ .get_pull = s3c_gpio_getpull_exynos4,
};
/*
diff --git a/drivers/gpio/gpio-nomadik.c b/drivers/gpio/gpio-nomadik.c
index 4961ef9..2c212c7 100644
--- a/drivers/gpio/gpio-nomadik.c
+++ b/drivers/gpio/gpio-nomadik.c
@@ -4,6 +4,7 @@
* Copyright (C) 2008,2009 STMicroelectronics
* Copyright (C) 2009 Alessandro Rubini <rubini@unipv.it>
* Rewritten based on work by Prafulla WADASKAR <prafulla.wadaskar@st.com>
+ * Copyright (C) 2011 Linus Walleij <linus.walleij@linaro.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
@@ -49,6 +50,7 @@ struct nmk_gpio_chip {
u32 (*get_secondary_status)(unsigned int bank);
void (*set_ioforce)(bool enable);
spinlock_t lock;
+ bool sleepmode;
/* Keep track of configured edges */
u32 edge_rising;
u32 edge_falling;
@@ -393,14 +395,25 @@ EXPORT_SYMBOL(nmk_config_pins_sleep);
* @gpio: pin number
* @mode: NMK_GPIO_SLPM_INPUT or NMK_GPIO_SLPM_NOCHANGE,
*
- * Sets the sleep mode of a pin. If @mode is NMK_GPIO_SLPM_INPUT, the pin is
- * changed to an input (with pullup/down enabled) in sleep and deep sleep. If
- * @mode is NMK_GPIO_SLPM_NOCHANGE, the pin remains in the state it was
- * configured even when in sleep and deep sleep.
+ * This register is actually in the pinmux layer, not the GPIO block itself.
+ * The GPIO1B_SLPM register defines the GPIO mode when SLEEP/DEEP-SLEEP
+ * mode is entered (i.e. when signal IOFORCE is HIGH by the platform code).
+ * Each GPIO can be configured to be forced into GPIO mode when IOFORCE is
+ * HIGH, overriding the normal setting defined by GPIO_AFSELx registers.
+ * When IOFORCE returns LOW (by software, after SLEEP/DEEP-SLEEP exit),
+ * the GPIOs return to the normal setting defined by GPIO_AFSELx registers.
*
- * On DB8500v2 onwards, this setting loses the previous meaning and instead
- * indicates if wakeup detection is enabled on the pin. Note that
- * enable_irq_wake() will automatically enable wakeup detection.
+ * If @mode is NMK_GPIO_SLPM_INPUT, the corresponding GPIO is switched to GPIO
+ * mode when signal IOFORCE is HIGH (i.e. when SLEEP/DEEP-SLEEP mode is
+ * entered) regardless of the altfunction selected. Also wake-up detection is
+ * ENABLED.
+ *
+ * If @mode is NMK_GPIO_SLPM_NOCHANGE, the corresponding GPIO remains
+ * controlled by NMK_GPIO_DATC, NMK_GPIO_DATS, NMK_GPIO_DIR, NMK_GPIO_PDIS
+ * (for altfunction GPIO) or respective on-chip peripherals (for other
+ * altfuncs) when IOFORCE is HIGH. Also wake-up detection DISABLED.
+ *
+ * Note that enable_irq_wake() will automatically enable wakeup detection.
*/
int nmk_gpio_set_slpm(int gpio, enum nmk_gpio_slpm mode)
{
@@ -551,6 +564,12 @@ static void __nmk_gpio_irq_modify(struct nmk_gpio_chip *nmk_chip,
static void __nmk_gpio_set_wake(struct nmk_gpio_chip *nmk_chip,
int gpio, bool on)
{
+ if (nmk_chip->sleepmode) {
+ __nmk_gpio_set_slpm(nmk_chip, gpio - nmk_chip->chip.base,
+ on ? NMK_GPIO_SLPM_WAKEUP_ENABLE
+ : NMK_GPIO_SLPM_WAKEUP_DISABLE);
+ }
+
__nmk_gpio_irq_modify(nmk_chip, gpio, WAKE, on);
}
@@ -901,7 +920,7 @@ void nmk_gpio_wakeups_suspend(void)
writel(chip->fwimsc & chip->real_wake,
chip->addr + NMK_GPIO_FWIMSC);
- if (cpu_is_u8500v2()) {
+ if (chip->sleepmode) {
chip->slpm = readl(chip->addr + NMK_GPIO_SLPC);
/* 0 -> wakeup enable */
@@ -923,7 +942,7 @@ void nmk_gpio_wakeups_resume(void)
writel(chip->rwimsc, chip->addr + NMK_GPIO_RWIMSC);
writel(chip->fwimsc, chip->addr + NMK_GPIO_FWIMSC);
- if (cpu_is_u8500v2())
+ if (chip->sleepmode)
writel(chip->slpm, chip->addr + NMK_GPIO_SLPC);
}
}
@@ -1010,6 +1029,7 @@ static int __devinit nmk_gpio_probe(struct platform_device *dev)
nmk_chip->secondary_parent_irq = secondary_irq;
nmk_chip->get_secondary_status = pdata->get_secondary_status;
nmk_chip->set_ioforce = pdata->set_ioforce;
+ nmk_chip->sleepmode = pdata->supports_sleepmode;
spin_lock_init(&nmk_chip->lock);
chip = &nmk_chip->chip;
@@ -1065,5 +1085,3 @@ core_initcall(nmk_gpio_init);
MODULE_AUTHOR("Prafulla WADASKAR and Alessandro Rubini");
MODULE_DESCRIPTION("Nomadik GPIO Driver");
MODULE_LICENSE("GPL");
-
-
diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c
index 6c51191..01f74a8 100644
--- a/drivers/gpio/gpio-omap.c
+++ b/drivers/gpio/gpio-omap.c
@@ -432,7 +432,6 @@ static inline void set_24xx_gpio_triggering(struct gpio_bank *bank, int gpio,
{
void __iomem *base = bank->base;
u32 gpio_bit = 1 << gpio;
- u32 val;
if (cpu_is_omap44xx()) {
MOD_REG_BIT(OMAP4_GPIO_LEVELDETECT0, gpio_bit,
@@ -455,15 +454,8 @@ static inline void set_24xx_gpio_triggering(struct gpio_bank *bank, int gpio,
}
if (likely(!(bank->non_wakeup_gpios & gpio_bit))) {
if (cpu_is_omap44xx()) {
- if (trigger != 0)
- __raw_writel(1 << gpio, bank->base+
- OMAP4_GPIO_IRQWAKEN0);
- else {
- val = __raw_readl(bank->base +
- OMAP4_GPIO_IRQWAKEN0);
- __raw_writel(val & (~(1 << gpio)), bank->base +
- OMAP4_GPIO_IRQWAKEN0);
- }
+ MOD_REG_BIT(OMAP4_GPIO_IRQWAKEN0, gpio_bit,
+ trigger != 0);
} else {
/*
* GPIO wakeup request can only be generated on edge
@@ -1134,8 +1126,11 @@ static void gpio_irq_shutdown(struct irq_data *d)
{
unsigned int gpio = d->irq - IH_GPIO_BASE;
struct gpio_bank *bank = irq_data_get_irq_chip_data(d);
+ unsigned long flags;
+ spin_lock_irqsave(&bank->lock, flags);
_reset_gpio(bank, gpio);
+ spin_unlock_irqrestore(&bank->lock, flags);
}
static void gpio_ack_irq(struct irq_data *d)
@@ -1150,9 +1145,12 @@ static void gpio_mask_irq(struct irq_data *d)
{
unsigned int gpio = d->irq - IH_GPIO_BASE;
struct gpio_bank *bank = irq_data_get_irq_chip_data(d);
+ unsigned long flags;
+ spin_lock_irqsave(&bank->lock, flags);
_set_gpio_irqenable(bank, gpio, 0);
_set_gpio_triggering(bank, get_gpio_index(gpio), IRQ_TYPE_NONE);
+ spin_unlock_irqrestore(&bank->lock, flags);
}
static void gpio_unmask_irq(struct irq_data *d)
@@ -1161,7 +1159,9 @@ static void gpio_unmask_irq(struct irq_data *d)
struct gpio_bank *bank = irq_data_get_irq_chip_data(d);
unsigned int irq_mask = 1 << get_gpio_index(gpio);
u32 trigger = irqd_get_trigger_type(d);
+ unsigned long flags;
+ spin_lock_irqsave(&bank->lock, flags);
if (trigger)
_set_gpio_triggering(bank, get_gpio_index(gpio), trigger);
@@ -1173,6 +1173,7 @@ static void gpio_unmask_irq(struct irq_data *d)
}
_set_gpio_irqenable(bank, gpio, 1);
+ spin_unlock_irqrestore(&bank->lock, flags);
}
static struct irq_chip gpio_irq_chip = {
@@ -1524,7 +1525,7 @@ static void omap_gpio_mod_init(struct gpio_bank *bank, int id)
}
}
-static void __init omap_gpio_chip_init(struct gpio_bank *bank)
+static void __devinit omap_gpio_chip_init(struct gpio_bank *bank)
{
int j;
static int gpio;
diff --git a/drivers/gpio/gpio-tegra.c b/drivers/gpio/gpio-tegra.c
new file mode 100644
index 0000000..13afb88
--- /dev/null
+++ b/drivers/gpio/gpio-tegra.c
@@ -0,0 +1,441 @@
+/*
+ * arch/arm/mach-tegra/gpio.c
+ *
+ * Copyright (c) 2010 Google, Inc
+ *
+ * Author:
+ * Erik Gilling <konkers@google.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+
+#include <linux/io.h>
+#include <linux/gpio.h>
+#include <linux/of.h>
+
+#include <asm/mach/irq.h>
+
+#include <mach/iomap.h>
+#include <mach/suspend.h>
+
+#define GPIO_BANK(x) ((x) >> 5)
+#define GPIO_PORT(x) (((x) >> 3) & 0x3)
+#define GPIO_BIT(x) ((x) & 0x7)
+
+#define GPIO_REG(x) (IO_TO_VIRT(TEGRA_GPIO_BASE) + \
+ GPIO_BANK(x) * 0x80 + \
+ GPIO_PORT(x) * 4)
+
+#define GPIO_CNF(x) (GPIO_REG(x) + 0x00)
+#define GPIO_OE(x) (GPIO_REG(x) + 0x10)
+#define GPIO_OUT(x) (GPIO_REG(x) + 0X20)
+#define GPIO_IN(x) (GPIO_REG(x) + 0x30)
+#define GPIO_INT_STA(x) (GPIO_REG(x) + 0x40)
+#define GPIO_INT_ENB(x) (GPIO_REG(x) + 0x50)
+#define GPIO_INT_LVL(x) (GPIO_REG(x) + 0x60)
+#define GPIO_INT_CLR(x) (GPIO_REG(x) + 0x70)
+
+#define GPIO_MSK_CNF(x) (GPIO_REG(x) + 0x800)
+#define GPIO_MSK_OE(x) (GPIO_REG(x) + 0x810)
+#define GPIO_MSK_OUT(x) (GPIO_REG(x) + 0X820)
+#define GPIO_MSK_INT_STA(x) (GPIO_REG(x) + 0x840)
+#define GPIO_MSK_INT_ENB(x) (GPIO_REG(x) + 0x850)
+#define GPIO_MSK_INT_LVL(x) (GPIO_REG(x) + 0x860)
+
+#define GPIO_INT_LVL_MASK 0x010101
+#define GPIO_INT_LVL_EDGE_RISING 0x000101
+#define GPIO_INT_LVL_EDGE_FALLING 0x000100
+#define GPIO_INT_LVL_EDGE_BOTH 0x010100
+#define GPIO_INT_LVL_LEVEL_HIGH 0x000001
+#define GPIO_INT_LVL_LEVEL_LOW 0x000000
+
+struct tegra_gpio_bank {
+ int bank;
+ int irq;
+ spinlock_t lvl_lock[4];
+#ifdef CONFIG_PM
+ u32 cnf[4];
+ u32 out[4];
+ u32 oe[4];
+ u32 int_enb[4];
+ u32 int_lvl[4];
+#endif
+};
+
+
+static struct tegra_gpio_bank tegra_gpio_banks[] = {
+ {.bank = 0, .irq = INT_GPIO1},
+ {.bank = 1, .irq = INT_GPIO2},
+ {.bank = 2, .irq = INT_GPIO3},
+ {.bank = 3, .irq = INT_GPIO4},
+ {.bank = 4, .irq = INT_GPIO5},
+ {.bank = 5, .irq = INT_GPIO6},
+ {.bank = 6, .irq = INT_GPIO7},
+};
+
+static int tegra_gpio_compose(int bank, int port, int bit)
+{
+ return (bank << 5) | ((port & 0x3) << 3) | (bit & 0x7);
+}
+
+static void tegra_gpio_mask_write(u32 reg, int gpio, int value)
+{
+ u32 val;
+
+ val = 0x100 << GPIO_BIT(gpio);
+ if (value)
+ val |= 1 << GPIO_BIT(gpio);
+ __raw_writel(val, reg);
+}
+
+void tegra_gpio_enable(int gpio)
+{
+ tegra_gpio_mask_write(GPIO_MSK_CNF(gpio), gpio, 1);
+}
+
+void tegra_gpio_disable(int gpio)
+{
+ tegra_gpio_mask_write(GPIO_MSK_CNF(gpio), gpio, 0);
+}
+
+static void tegra_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
+{
+ tegra_gpio_mask_write(GPIO_MSK_OUT(offset), offset, value);
+}
+
+static int tegra_gpio_get(struct gpio_chip *chip, unsigned offset)
+{
+ return (__raw_readl(GPIO_IN(offset)) >> GPIO_BIT(offset)) & 0x1;
+}
+
+static int tegra_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
+{
+ tegra_gpio_mask_write(GPIO_MSK_OE(offset), offset, 0);
+ return 0;
+}
+
+static int tegra_gpio_direction_output(struct gpio_chip *chip, unsigned offset,
+ int value)
+{
+ tegra_gpio_set(chip, offset, value);
+ tegra_gpio_mask_write(GPIO_MSK_OE(offset), offset, 1);
+ return 0;
+}
+
+
+
+static struct gpio_chip tegra_gpio_chip = {
+ .label = "tegra-gpio",
+ .direction_input = tegra_gpio_direction_input,
+ .get = tegra_gpio_get,
+ .direction_output = tegra_gpio_direction_output,
+ .set = tegra_gpio_set,
+ .base = 0,
+ .ngpio = TEGRA_NR_GPIOS,
+};
+
+static void tegra_gpio_irq_ack(struct irq_data *d)
+{
+ int gpio = d->irq - INT_GPIO_BASE;
+
+ __raw_writel(1 << GPIO_BIT(gpio), GPIO_INT_CLR(gpio));
+}
+
+static void tegra_gpio_irq_mask(struct irq_data *d)
+{
+ int gpio = d->irq - INT_GPIO_BASE;
+
+ tegra_gpio_mask_write(GPIO_MSK_INT_ENB(gpio), gpio, 0);
+}
+
+static void tegra_gpio_irq_unmask(struct irq_data *d)
+{
+ int gpio = d->irq - INT_GPIO_BASE;
+
+ tegra_gpio_mask_write(GPIO_MSK_INT_ENB(gpio), gpio, 1);
+}
+
+static int tegra_gpio_irq_set_type(struct irq_data *d, unsigned int type)
+{
+ int gpio = d->irq - INT_GPIO_BASE;
+ struct tegra_gpio_bank *bank = irq_data_get_irq_chip_data(d);
+ int port = GPIO_PORT(gpio);
+ int lvl_type;
+ int val;
+ unsigned long flags;
+
+ switch (type & IRQ_TYPE_SENSE_MASK) {
+ case IRQ_TYPE_EDGE_RISING:
+ lvl_type = GPIO_INT_LVL_EDGE_RISING;
+ break;
+
+ case IRQ_TYPE_EDGE_FALLING:
+ lvl_type = GPIO_INT_LVL_EDGE_FALLING;
+ break;
+
+ case IRQ_TYPE_EDGE_BOTH:
+ lvl_type = GPIO_INT_LVL_EDGE_BOTH;
+ break;
+
+ case IRQ_TYPE_LEVEL_HIGH:
+ lvl_type = GPIO_INT_LVL_LEVEL_HIGH;
+ break;
+
+ case IRQ_TYPE_LEVEL_LOW:
+ lvl_type = GPIO_INT_LVL_LEVEL_LOW;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ spin_lock_irqsave(&bank->lvl_lock[port], flags);
+
+ val = __raw_readl(GPIO_INT_LVL(gpio));
+ val &= ~(GPIO_INT_LVL_MASK << GPIO_BIT(gpio));
+ val |= lvl_type << GPIO_BIT(gpio);
+ __raw_writel(val, GPIO_INT_LVL(gpio));
+
+ spin_unlock_irqrestore(&bank->lvl_lock[port], flags);
+
+ if (type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH))
+ __irq_set_handler_locked(d->irq, handle_level_irq);
+ else if (type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING))
+ __irq_set_handler_locked(d->irq, handle_edge_irq);
+
+ return 0;
+}
+
+static void tegra_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
+{
+ struct tegra_gpio_bank *bank;
+ int port;
+ int pin;
+ int unmasked = 0;
+ struct irq_chip *chip = irq_desc_get_chip(desc);
+
+ chained_irq_enter(chip, desc);
+
+ bank = irq_get_handler_data(irq);
+
+ for (port = 0; port < 4; port++) {
+ int gpio = tegra_gpio_compose(bank->bank, port, 0);
+ unsigned long sta = __raw_readl(GPIO_INT_STA(gpio)) &
+ __raw_readl(GPIO_INT_ENB(gpio));
+ u32 lvl = __raw_readl(GPIO_INT_LVL(gpio));
+
+ for_each_set_bit(pin, &sta, 8) {
+ __raw_writel(1 << pin, GPIO_INT_CLR(gpio));
+
+ /* if gpio is edge triggered, clear condition
+ * before executing the hander so that we don't
+ * miss edges
+ */
+ if (lvl & (0x100 << pin)) {
+ unmasked = 1;
+ chained_irq_exit(chip, desc);
+ }
+
+ generic_handle_irq(gpio_to_irq(gpio + pin));
+ }
+ }
+
+ if (!unmasked)
+ chained_irq_exit(chip, desc);
+
+}
+
+#ifdef CONFIG_PM
+void tegra_gpio_resume(void)
+{
+ unsigned long flags;
+ int b;
+ int p;
+
+ local_irq_save(flags);
+
+ for (b = 0; b < ARRAY_SIZE(tegra_gpio_banks); b++) {
+ struct tegra_gpio_bank *bank = &tegra_gpio_banks[b];
+
+ for (p = 0; p < ARRAY_SIZE(bank->oe); p++) {
+ unsigned int gpio = (b<<5) | (p<<3);
+ __raw_writel(bank->cnf[p], GPIO_CNF(gpio));
+ __raw_writel(bank->out[p], GPIO_OUT(gpio));
+ __raw_writel(bank->oe[p], GPIO_OE(gpio));
+ __raw_writel(bank->int_lvl[p], GPIO_INT_LVL(gpio));
+ __raw_writel(bank->int_enb[p], GPIO_INT_ENB(gpio));
+ }
+ }
+
+ local_irq_restore(flags);
+}
+
+void tegra_gpio_suspend(void)
+{
+ unsigned long flags;
+ int b;
+ int p;
+
+ local_irq_save(flags);
+ for (b = 0; b < ARRAY_SIZE(tegra_gpio_banks); b++) {
+ struct tegra_gpio_bank *bank = &tegra_gpio_banks[b];
+
+ for (p = 0; p < ARRAY_SIZE(bank->oe); p++) {
+ unsigned int gpio = (b<<5) | (p<<3);
+ bank->cnf[p] = __raw_readl(GPIO_CNF(gpio));
+ bank->out[p] = __raw_readl(GPIO_OUT(gpio));
+ bank->oe[p] = __raw_readl(GPIO_OE(gpio));
+ bank->int_enb[p] = __raw_readl(GPIO_INT_ENB(gpio));
+ bank->int_lvl[p] = __raw_readl(GPIO_INT_LVL(gpio));
+ }
+ }
+ local_irq_restore(flags);
+}
+
+static int tegra_gpio_wake_enable(struct irq_data *d, unsigned int enable)
+{
+ struct tegra_gpio_bank *bank = irq_data_get_irq_chip_data(d);
+ return irq_set_irq_wake(bank->irq, enable);
+}
+#endif
+
+static struct irq_chip tegra_gpio_irq_chip = {
+ .name = "GPIO",
+ .irq_ack = tegra_gpio_irq_ack,
+ .irq_mask = tegra_gpio_irq_mask,
+ .irq_unmask = tegra_gpio_irq_unmask,
+ .irq_set_type = tegra_gpio_irq_set_type,
+#ifdef CONFIG_PM
+ .irq_set_wake = tegra_gpio_wake_enable,
+#endif
+};
+
+
+/* This lock class tells lockdep that GPIO irqs are in a different
+ * category than their parents, so it won't report false recursion.
+ */
+static struct lock_class_key gpio_lock_class;
+
+static int __init tegra_gpio_init(void)
+{
+ struct tegra_gpio_bank *bank;
+ int i;
+ int j;
+
+ for (i = 0; i < 7; i++) {
+ for (j = 0; j < 4; j++) {
+ int gpio = tegra_gpio_compose(i, j, 0);
+ __raw_writel(0x00, GPIO_INT_ENB(gpio));
+ }
+ }
+
+#ifdef CONFIG_OF_GPIO
+ /*
+ * This isn't ideal, but it gets things hooked up until this
+ * driver is converted into a platform_device
+ */
+ tegra_gpio_chip.of_node = of_find_compatible_node(NULL, NULL,
+ "nvidia,tegra250-gpio");
+#endif /* CONFIG_OF_GPIO */
+
+ gpiochip_add(&tegra_gpio_chip);
+
+ for (i = INT_GPIO_BASE; i < (INT_GPIO_BASE + TEGRA_NR_GPIOS); i++) {
+ bank = &tegra_gpio_banks[GPIO_BANK(irq_to_gpio(i))];
+
+ irq_set_lockdep_class(i, &gpio_lock_class);
+ irq_set_chip_data(i, bank);
+ irq_set_chip_and_handler(i, &tegra_gpio_irq_chip,
+ handle_simple_irq);
+ set_irq_flags(i, IRQF_VALID);
+ }
+
+ for (i = 0; i < ARRAY_SIZE(tegra_gpio_banks); i++) {
+ bank = &tegra_gpio_banks[i];
+
+ irq_set_chained_handler(bank->irq, tegra_gpio_irq_handler);
+ irq_set_handler_data(bank->irq, bank);
+
+ for (j = 0; j < 4; j++)
+ spin_lock_init(&bank->lvl_lock[j]);
+ }
+
+ return 0;
+}
+
+postcore_initcall(tegra_gpio_init);
+
+void __init tegra_gpio_config(struct tegra_gpio_table *table, int num)
+{
+ int i;
+
+ for (i = 0; i < num; i++) {
+ int gpio = table[i].gpio;
+
+ if (table[i].enable)
+ tegra_gpio_enable(gpio);
+ else
+ tegra_gpio_disable(gpio);
+ }
+}
+
+#ifdef CONFIG_DEBUG_FS
+
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+
+static int dbg_gpio_show(struct seq_file *s, void *unused)
+{
+ int i;
+ int j;
+
+ for (i = 0; i < 7; i++) {
+ for (j = 0; j < 4; j++) {
+ int gpio = tegra_gpio_compose(i, j, 0);
+ seq_printf(s,
+ "%d:%d %02x %02x %02x %02x %02x %02x %06x\n",
+ i, j,
+ __raw_readl(GPIO_CNF(gpio)),
+ __raw_readl(GPIO_OE(gpio)),
+ __raw_readl(GPIO_OUT(gpio)),
+ __raw_readl(GPIO_IN(gpio)),
+ __raw_readl(GPIO_INT_STA(gpio)),
+ __raw_readl(GPIO_INT_ENB(gpio)),
+ __raw_readl(GPIO_INT_LVL(gpio)));
+ }
+ }
+ return 0;
+}
+
+static int dbg_gpio_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, dbg_gpio_show, &inode->i_private);
+}
+
+static const struct file_operations debug_fops = {
+ .open = dbg_gpio_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int __init tegra_gpio_debuginit(void)
+{
+ (void) debugfs_create_file("tegra_gpio", S_IRUGO,
+ NULL, NULL, &debug_fops);
+ return 0;
+}
+late_initcall(tegra_gpio_debuginit);
+#endif
generated by cgit v1.1 at 2024-12-26 15:42:18 +0000