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@@ -7,7 +7,7 @@
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* Description: GPIO Abstraction Layer
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*
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* Modified:
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- * Copyright 2007 Analog Devices Inc.
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+ * Copyright 2008 Analog Devices Inc.
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*
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* Bugs: Enter bugs at http://blackfin.uclinux.org/
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*
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@@ -83,6 +83,7 @@
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#include <linux/delay.h>
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#include <linux/module.h>
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#include <linux/err.h>
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+#include <linux/proc_fs.h>
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#include <asm/blackfin.h>
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#include <asm/gpio.h>
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#include <asm/portmux.h>
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@@ -136,7 +137,6 @@ static unsigned short *port_fer[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
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(unsigned short *) PORTG_FER,
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(unsigned short *) PORTH_FER,
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};
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-
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#endif
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#ifdef BF527_FAMILY
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@@ -178,15 +178,13 @@ static struct gpio_port_t *gpio_array[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
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#endif
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static unsigned short reserved_gpio_map[gpio_bank(MAX_BLACKFIN_GPIOS)];
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-static unsigned short reserved_peri_map[gpio_bank(MAX_BLACKFIN_GPIOS + 16)];
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+static unsigned short reserved_peri_map[gpio_bank(MAX_RESOURCES)];
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-#define MAX_RESOURCES 256
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#define RESOURCE_LABEL_SIZE 16
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-struct str_ident {
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+static struct str_ident {
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char name[RESOURCE_LABEL_SIZE];
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-} *str_ident;
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-
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+} str_ident[MAX_RESOURCES];
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#ifdef CONFIG_PM
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static unsigned short wakeup_map[gpio_bank(MAX_BLACKFIN_GPIOS)];
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@@ -212,7 +210,7 @@ static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG0_INT
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#endif /* CONFIG_PM */
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#if defined(BF548_FAMILY)
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-inline int check_gpio(unsigned short gpio)
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+inline int check_gpio(unsigned gpio)
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{
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if (gpio == GPIO_PB15 || gpio == GPIO_PC14 || gpio == GPIO_PC15
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|| gpio == GPIO_PH14 || gpio == GPIO_PH15
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@@ -222,7 +220,7 @@ inline int check_gpio(unsigned short gpio)
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return 0;
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}
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#else
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-inline int check_gpio(unsigned short gpio)
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+inline int check_gpio(unsigned gpio)
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{
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if (gpio >= MAX_BLACKFIN_GPIOS)
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return -EINVAL;
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@@ -230,9 +228,13 @@ inline int check_gpio(unsigned short gpio)
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}
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#endif
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-static void set_label(unsigned short ident, const char *label)
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+void gpio_error(unsigned gpio)
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{
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+ printk(KERN_ERR "bfin-gpio: GPIO %d wasn't requested!\n", gpio);
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+}
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+static void set_label(unsigned short ident, const char *label)
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+{
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if (label && str_ident) {
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strncpy(str_ident[ident].name, label,
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RESOURCE_LABEL_SIZE);
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@@ -250,6 +252,11 @@ static char *get_label(unsigned short ident)
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static int cmp_label(unsigned short ident, const char *label)
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{
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+ if (label == NULL) {
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+ dump_stack();
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+ printk(KERN_ERR "Please provide none-null label\n");
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+ }
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+
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if (label && str_ident)
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return strncmp(str_ident[ident].name,
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label, strlen(label));
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@@ -258,7 +265,7 @@ static int cmp_label(unsigned short ident, const char *label)
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}
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#if defined(BF527_FAMILY) || defined(BF537_FAMILY)
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-static void port_setup(unsigned short gpio, unsigned short usage)
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+static void port_setup(unsigned gpio, unsigned short usage)
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{
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if (!check_gpio(gpio)) {
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if (usage == GPIO_USAGE)
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@@ -269,7 +276,7 @@ static void port_setup(unsigned short gpio, unsigned short usage)
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}
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}
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#elif defined(BF548_FAMILY)
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-static void port_setup(unsigned short gpio, unsigned short usage)
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+static void port_setup(unsigned gpio, unsigned short usage)
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{
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if (usage == GPIO_USAGE)
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gpio_array[gpio_bank(gpio)]->port_fer &= ~gpio_bit(gpio);
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@@ -390,7 +397,7 @@ inline void portmux_setup(unsigned short portno, unsigned short function)
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#endif
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#ifndef BF548_FAMILY
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-static void default_gpio(unsigned short gpio)
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+static void default_gpio(unsigned gpio)
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{
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unsigned short bank, bitmask;
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unsigned long flags;
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@@ -410,7 +417,6 @@ static void default_gpio(unsigned short gpio)
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gpio_bankb[bank]->edge &= ~bitmask;
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AWA_DUMMY_READ(edge);
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local_irq_restore(flags);
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-
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}
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#else
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# define default_gpio(...) do { } while (0)
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@@ -418,12 +424,6 @@ static void default_gpio(unsigned short gpio)
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static int __init bfin_gpio_init(void)
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{
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- str_ident = kcalloc(MAX_RESOURCES,
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- sizeof(struct str_ident), GFP_KERNEL);
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- if (str_ident == NULL)
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- return -ENOMEM;
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-
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- memset(str_ident, 0, MAX_RESOURCES * sizeof(struct str_ident));
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printk(KERN_INFO "Blackfin GPIO Controller\n");
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@@ -454,10 +454,9 @@ arch_initcall(bfin_gpio_init);
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/* Set a specific bit */
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#define SET_GPIO(name) \
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-void set_gpio_ ## name(unsigned short gpio, unsigned short arg) \
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+void set_gpio_ ## name(unsigned gpio, unsigned short arg) \
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{ \
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unsigned long flags; \
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- BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))); \
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local_irq_save(flags); \
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if (arg) \
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gpio_bankb[gpio_bank(gpio)]->name |= gpio_bit(gpio); \
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@@ -477,10 +476,9 @@ SET_GPIO(both)
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#if ANOMALY_05000311 || ANOMALY_05000323
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#define SET_GPIO_SC(name) \
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-void set_gpio_ ## name(unsigned short gpio, unsigned short arg) \
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+void set_gpio_ ## name(unsigned gpio, unsigned short arg) \
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{ \
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unsigned long flags; \
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- BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))); \
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local_irq_save(flags); \
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if (arg) \
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gpio_bankb[gpio_bank(gpio)]->name ## _set = gpio_bit(gpio); \
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@@ -492,9 +490,8 @@ void set_gpio_ ## name(unsigned short gpio, unsigned short arg) \
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EXPORT_SYMBOL(set_gpio_ ## name);
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#else
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#define SET_GPIO_SC(name) \
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-void set_gpio_ ## name(unsigned short gpio, unsigned short arg) \
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+void set_gpio_ ## name(unsigned gpio, unsigned short arg) \
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{ \
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- BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))); \
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if (arg) \
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gpio_bankb[gpio_bank(gpio)]->name ## _set = gpio_bit(gpio); \
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else \
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@@ -508,19 +505,17 @@ SET_GPIO_SC(maskb)
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SET_GPIO_SC(data)
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#if ANOMALY_05000311 || ANOMALY_05000323
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-void set_gpio_toggle(unsigned short gpio)
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+void set_gpio_toggle(unsigned gpio)
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{
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unsigned long flags;
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- BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)));
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local_irq_save(flags);
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gpio_bankb[gpio_bank(gpio)]->toggle = gpio_bit(gpio);
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AWA_DUMMY_READ(toggle);
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local_irq_restore(flags);
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}
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#else
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-void set_gpio_toggle(unsigned short gpio)
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+void set_gpio_toggle(unsigned gpio)
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{
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- BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)));
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gpio_bankb[gpio_bank(gpio)]->toggle = gpio_bit(gpio);
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}
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#endif
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@@ -531,7 +526,7 @@ EXPORT_SYMBOL(set_gpio_toggle);
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#if ANOMALY_05000311 || ANOMALY_05000323
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#define SET_GPIO_P(name) \
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-void set_gpiop_ ## name(unsigned short gpio, unsigned short arg) \
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+void set_gpiop_ ## name(unsigned gpio, unsigned short arg) \
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{ \
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unsigned long flags; \
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local_irq_save(flags); \
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@@ -542,7 +537,7 @@ void set_gpiop_ ## name(unsigned short gpio, unsigned short arg) \
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EXPORT_SYMBOL(set_gpiop_ ## name);
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#else
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#define SET_GPIO_P(name) \
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-void set_gpiop_ ## name(unsigned short gpio, unsigned short arg) \
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+void set_gpiop_ ## name(unsigned gpio, unsigned short arg) \
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{ \
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gpio_bankb[gpio_bank(gpio)]->name = arg; \
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} \
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@@ -558,11 +553,10 @@ SET_GPIO_P(both)
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SET_GPIO_P(maska)
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SET_GPIO_P(maskb)
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-
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/* Get a specific bit */
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#if ANOMALY_05000311 || ANOMALY_05000323
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#define GET_GPIO(name) \
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-unsigned short get_gpio_ ## name(unsigned short gpio) \
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+unsigned short get_gpio_ ## name(unsigned gpio) \
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{ \
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unsigned long flags; \
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unsigned short ret; \
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@@ -575,7 +569,7 @@ unsigned short get_gpio_ ## name(unsigned short gpio) \
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EXPORT_SYMBOL(get_gpio_ ## name);
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#else
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#define GET_GPIO(name) \
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-unsigned short get_gpio_ ## name(unsigned short gpio) \
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+unsigned short get_gpio_ ## name(unsigned gpio) \
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{ \
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return (0x01 & (gpio_bankb[gpio_bank(gpio)]->name >> gpio_sub_n(gpio))); \
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} \
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@@ -595,7 +589,7 @@ GET_GPIO(maskb)
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#if ANOMALY_05000311 || ANOMALY_05000323
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#define GET_GPIO_P(name) \
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-unsigned short get_gpiop_ ## name(unsigned short gpio) \
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+unsigned short get_gpiop_ ## name(unsigned gpio) \
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{ \
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unsigned long flags; \
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unsigned short ret; \
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@@ -608,7 +602,7 @@ unsigned short get_gpiop_ ## name(unsigned short gpio) \
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EXPORT_SYMBOL(get_gpiop_ ## name);
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#else
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#define GET_GPIO_P(name) \
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-unsigned short get_gpiop_ ## name(unsigned short gpio) \
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+unsigned short get_gpiop_ ## name(unsigned gpio) \
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{ \
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return (gpio_bankb[gpio_bank(gpio)]->name);\
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} \
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@@ -645,7 +639,7 @@ GET_GPIO_P(maskb)
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*************************************************************
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* MODIFICATION HISTORY :
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**************************************************************/
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-int gpio_pm_wakeup_request(unsigned short gpio, unsigned char type)
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+int gpio_pm_wakeup_request(unsigned gpio, unsigned char type)
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{
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unsigned long flags;
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@@ -653,7 +647,6 @@ int gpio_pm_wakeup_request(unsigned short gpio, unsigned char type)
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return -EINVAL;
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local_irq_save(flags);
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-
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wakeup_map[gpio_bank(gpio)] |= gpio_bit(gpio);
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wakeup_flags_map[gpio] = type;
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local_irq_restore(flags);
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@@ -662,7 +655,7 @@ int gpio_pm_wakeup_request(unsigned short gpio, unsigned char type)
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}
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EXPORT_SYMBOL(gpio_pm_wakeup_request);
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-void gpio_pm_wakeup_free(unsigned short gpio)
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+void gpio_pm_wakeup_free(unsigned gpio)
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{
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unsigned long flags;
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@@ -677,7 +670,7 @@ void gpio_pm_wakeup_free(unsigned short gpio)
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}
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EXPORT_SYMBOL(gpio_pm_wakeup_free);
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-static int bfin_gpio_wakeup_type(unsigned short gpio, unsigned char type)
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+static int bfin_gpio_wakeup_type(unsigned gpio, unsigned char type)
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{
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port_setup(gpio, GPIO_USAGE);
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set_gpio_dir(gpio, 0);
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@@ -784,6 +777,14 @@ void gpio_pm_restore(void)
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}
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#endif
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+#else /* BF548_FAMILY */
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+
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+unsigned short get_gpio_dir(unsigned gpio)
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+{
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+ return (0x01 & (gpio_array[gpio_bank(gpio)]->port_dir_clear >> gpio_sub_n(gpio)));
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+}
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+EXPORT_SYMBOL(get_gpio_dir);
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+
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#endif /* BF548_FAMILY */
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/***********************************************************
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@@ -1028,7 +1029,7 @@ EXPORT_SYMBOL(peripheral_free_list);
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* MODIFICATION HISTORY :
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**************************************************************/
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-int gpio_request(unsigned short gpio, const char *label)
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+int gpio_request(unsigned gpio, const char *label)
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{
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unsigned long flags;
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@@ -1075,7 +1076,7 @@ int gpio_request(unsigned short gpio, const char *label)
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}
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EXPORT_SYMBOL(gpio_request);
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-void gpio_free(unsigned short gpio)
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+void gpio_free(unsigned gpio)
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{
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unsigned long flags;
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@@ -1085,7 +1086,7 @@ void gpio_free(unsigned short gpio)
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local_irq_save(flags);
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if (unlikely(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)))) {
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- printk(KERN_ERR "bfin-gpio: GPIO %d wasn't reserved!\n", gpio);
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+ gpio_error(gpio);
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dump_stack();
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local_irq_restore(flags);
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return;
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@@ -1101,44 +1102,55 @@ void gpio_free(unsigned short gpio)
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}
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EXPORT_SYMBOL(gpio_free);
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+
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#ifdef BF548_FAMILY
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-void gpio_direction_input(unsigned short gpio)
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+int gpio_direction_input(unsigned gpio)
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{
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unsigned long flags;
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- BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)));
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+ if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
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+ gpio_error(gpio);
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+ return -EINVAL;
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+ }
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local_irq_save(flags);
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gpio_array[gpio_bank(gpio)]->port_dir_clear = gpio_bit(gpio);
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gpio_array[gpio_bank(gpio)]->port_inen |= gpio_bit(gpio);
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local_irq_restore(flags);
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+
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+ return 0;
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}
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EXPORT_SYMBOL(gpio_direction_input);
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-void gpio_direction_output(unsigned short gpio)
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+int gpio_direction_output(unsigned gpio, int value)
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{
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unsigned long flags;
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- BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)));
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+ if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
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+ gpio_error(gpio);
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+ return -EINVAL;
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+ }
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local_irq_save(flags);
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gpio_array[gpio_bank(gpio)]->port_inen &= ~gpio_bit(gpio);
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+ gpio_set_value(gpio, value);
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gpio_array[gpio_bank(gpio)]->port_dir_set = gpio_bit(gpio);
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local_irq_restore(flags);
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+
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+ return 0;
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}
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EXPORT_SYMBOL(gpio_direction_output);
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-void gpio_set_value(unsigned short gpio, unsigned short arg)
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+void gpio_set_value(unsigned gpio, int arg)
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{
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if (arg)
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gpio_array[gpio_bank(gpio)]->port_set = gpio_bit(gpio);
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else
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gpio_array[gpio_bank(gpio)]->port_clear = gpio_bit(gpio);
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-
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}
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EXPORT_SYMBOL(gpio_set_value);
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-unsigned short gpio_get_value(unsigned short gpio)
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+int gpio_get_value(unsigned gpio)
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{
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return (1 & (gpio_array[gpio_bank(gpio)]->port_data >> gpio_sub_n(gpio)));
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}
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@@ -1146,31 +1158,47 @@ EXPORT_SYMBOL(gpio_get_value);
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#else
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-void gpio_direction_input(unsigned short gpio)
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+int gpio_direction_input(unsigned gpio)
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{
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unsigned long flags;
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- BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)));
|
|
|
+ if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
|
|
|
+ gpio_error(gpio);
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
|
|
|
local_irq_save(flags);
|
|
|
gpio_bankb[gpio_bank(gpio)]->dir &= ~gpio_bit(gpio);
|
|
|
gpio_bankb[gpio_bank(gpio)]->inen |= gpio_bit(gpio);
|
|
|
AWA_DUMMY_READ(inen);
|
|
|
local_irq_restore(flags);
|
|
|
+
|
|
|
+ return 0;
|
|
|
}
|
|
|
EXPORT_SYMBOL(gpio_direction_input);
|
|
|
|
|
|
-void gpio_direction_output(unsigned short gpio)
|
|
|
+int gpio_direction_output(unsigned gpio, int value)
|
|
|
{
|
|
|
unsigned long flags;
|
|
|
|
|
|
- BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)));
|
|
|
+ if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
|
|
|
+ gpio_error(gpio);
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
|
|
|
local_irq_save(flags);
|
|
|
gpio_bankb[gpio_bank(gpio)]->inen &= ~gpio_bit(gpio);
|
|
|
+
|
|
|
+ if (value)
|
|
|
+ gpio_bankb[gpio_bank(gpio)]->data_set = gpio_bit(gpio);
|
|
|
+ else
|
|
|
+ gpio_bankb[gpio_bank(gpio)]->data_clear = gpio_bit(gpio);
|
|
|
+
|
|
|
gpio_bankb[gpio_bank(gpio)]->dir |= gpio_bit(gpio);
|
|
|
AWA_DUMMY_READ(dir);
|
|
|
local_irq_restore(flags);
|
|
|
+
|
|
|
+ return 0;
|
|
|
}
|
|
|
EXPORT_SYMBOL(gpio_direction_output);
|
|
|
|
|
@@ -1190,7 +1218,40 @@ void bfin_gpio_reset_spi0_ssel1(void)
|
|
|
|
|
|
port_setup(gpio, GPIO_USAGE);
|
|
|
gpio_bankb[gpio_bank(gpio)]->data_set = gpio_bit(gpio);
|
|
|
+ AWA_DUMMY_READ(data_set);
|
|
|
udelay(1);
|
|
|
}
|
|
|
|
|
|
#endif /*BF548_FAMILY */
|
|
|
+
|
|
|
+#if defined(CONFIG_PROC_FS)
|
|
|
+static int gpio_proc_read(char *buf, char **start, off_t offset,
|
|
|
+ int len, int *unused_i, void *unused_v)
|
|
|
+{
|
|
|
+ int c, outlen = 0;
|
|
|
+
|
|
|
+ for (c = 0; c < MAX_RESOURCES; c++) {
|
|
|
+ if (!check_gpio(c) && (reserved_gpio_map[gpio_bank(c)] & gpio_bit(c)))
|
|
|
+ len = sprintf(buf, "GPIO_%d: %s \t\tGPIO %s\n", c,
|
|
|
+ get_label(c), get_gpio_dir(c) ? "OUTPUT" : "INPUT");
|
|
|
+ else if (reserved_peri_map[gpio_bank(c)] & gpio_bit(c))
|
|
|
+ len = sprintf(buf, "GPIO_%d: %s \t\tPeripheral\n", c, get_label(c));
|
|
|
+ else
|
|
|
+ continue;
|
|
|
+ buf += len;
|
|
|
+ outlen += len;
|
|
|
+ }
|
|
|
+ return outlen;
|
|
|
+}
|
|
|
+
|
|
|
+static __init int gpio_register_proc(void)
|
|
|
+{
|
|
|
+ struct proc_dir_entry *proc_gpio;
|
|
|
+
|
|
|
+ proc_gpio = create_proc_entry("gpio", S_IRUGO, NULL);
|
|
|
+ if (proc_gpio)
|
|
|
+ proc_gpio->read_proc = gpio_proc_read;
|
|
|
+ return proc_gpio != NULL;
|
|
|
+}
|
|
|
+__initcall(gpio_register_proc);
|
|
|
+#endif
|