Blackfin arch: Convert Blackfin GPIO driver to use common gpiolib/gpiochip infrastructure
- This patch adds support for ARCH_WANT_OPTIONAL_GPIOLIB.
- It may be changed in future to ARCH_REQUIRE_GPIOLIB.
- Change GPIO_BANK_NUM use DIV_ROUND_UP( , ) macro
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
diff --git a/arch/blackfin/kernel/bfin_gpio.c b/arch/blackfin/kernel/bfin_gpio.c
index 6939272..f8d666e 100644
--- a/arch/blackfin/kernel/bfin_gpio.c
+++ b/arch/blackfin/kernel/bfin_gpio.c
@@ -1020,7 +1020,7 @@
* MODIFICATION HISTORY :
**************************************************************/
-int gpio_request(unsigned gpio, const char *label)
+int bfin_gpio_request(unsigned gpio, const char *label)
{
unsigned long flags;
@@ -1065,9 +1065,9 @@
return 0;
}
-EXPORT_SYMBOL(gpio_request);
+EXPORT_SYMBOL(bfin_gpio_request);
-void gpio_free(unsigned gpio)
+void bfin_gpio_free(unsigned gpio)
{
unsigned long flags;
@@ -1089,11 +1089,11 @@
local_irq_restore(flags);
}
-EXPORT_SYMBOL(gpio_free);
+EXPORT_SYMBOL(bfin_gpio_free);
#ifdef BF548_FAMILY
-int gpio_direction_input(unsigned gpio)
+int bfin_gpio_direction_input(unsigned gpio)
{
unsigned long flags;
@@ -1109,9 +1109,9 @@
return 0;
}
-EXPORT_SYMBOL(gpio_direction_input);
+EXPORT_SYMBOL(bfin_gpio_direction_input);
-int gpio_direction_output(unsigned gpio, int value)
+int bfin_gpio_direction_output(unsigned gpio, int value)
{
unsigned long flags;
@@ -1128,22 +1128,22 @@
return 0;
}
-EXPORT_SYMBOL(gpio_direction_output);
+EXPORT_SYMBOL(bfin_gpio_direction_output);
-void gpio_set_value(unsigned gpio, int arg)
+void bfin_gpio_set_value(unsigned gpio, int arg)
{
if (arg)
gpio_array[gpio_bank(gpio)]->port_set = gpio_bit(gpio);
else
gpio_array[gpio_bank(gpio)]->port_clear = gpio_bit(gpio);
}
-EXPORT_SYMBOL(gpio_set_value);
+EXPORT_SYMBOL(bfin_gpio_set_value);
-int gpio_get_value(unsigned gpio)
+int bfin_gpio_get_value(unsigned gpio)
{
return (1 & (gpio_array[gpio_bank(gpio)]->port_data >> gpio_sub_n(gpio)));
}
-EXPORT_SYMBOL(gpio_get_value);
+EXPORT_SYMBOL(bfin_gpio_get_value);
void bfin_gpio_irq_prepare(unsigned gpio)
{
@@ -1159,7 +1159,7 @@
#else
-int gpio_get_value(unsigned gpio)
+int bfin_gpio_get_value(unsigned gpio)
{
unsigned long flags;
int ret;
@@ -1175,10 +1175,10 @@
} else
return get_gpio_data(gpio);
}
-EXPORT_SYMBOL(gpio_get_value);
+EXPORT_SYMBOL(bfin_gpio_get_value);
-int gpio_direction_input(unsigned gpio)
+int bfin_gpio_direction_input(unsigned gpio)
{
unsigned long flags;
@@ -1195,9 +1195,9 @@
return 0;
}
-EXPORT_SYMBOL(gpio_direction_input);
+EXPORT_SYMBOL(bfin_gpio_direction_input);
-int gpio_direction_output(unsigned gpio, int value)
+int bfin_gpio_direction_output(unsigned gpio, int value)
{
unsigned long flags;
@@ -1220,7 +1220,7 @@
return 0;
}
-EXPORT_SYMBOL(gpio_direction_output);
+EXPORT_SYMBOL(bfin_gpio_direction_output);
/* If we are booting from SPI and our board lacks a strong enough pull up,
* the core can reset and execute the bootrom faster than the resistor can
@@ -1280,3 +1280,57 @@
}
__initcall(gpio_register_proc);
#endif
+
+#ifdef CONFIG_GPIOLIB
+int bfin_gpiolib_direction_input(struct gpio_chip *chip, unsigned gpio)
+{
+ return bfin_gpio_direction_input(gpio);
+}
+
+int bfin_gpiolib_direction_output(struct gpio_chip *chip, unsigned gpio, int level)
+{
+ return bfin_gpio_direction_output(gpio, level);
+}
+
+int bfin_gpiolib_get_value(struct gpio_chip *chip, unsigned gpio)
+{
+ return bfin_gpio_get_value(gpio);
+}
+
+void bfin_gpiolib_set_value(struct gpio_chip *chip, unsigned gpio, int value)
+{
+#ifdef BF548_FAMILY
+ return bfin_gpio_set_value(gpio, value);
+#else
+ return set_gpio_data(gpio, value);
+#endif
+}
+
+int bfin_gpiolib_gpio_request(struct gpio_chip *chip, unsigned gpio)
+{
+ return bfin_gpio_request(gpio, chip->label);
+}
+
+void bfin_gpiolib_gpio_free(struct gpio_chip *chip, unsigned gpio)
+{
+ return bfin_gpio_free(gpio);
+}
+
+static struct gpio_chip bfin_chip = {
+ .label = "Blackfin-GPIOlib",
+ .direction_input = bfin_gpiolib_direction_input,
+ .get = bfin_gpiolib_get_value,
+ .direction_output = bfin_gpiolib_direction_output,
+ .set = bfin_gpiolib_set_value,
+ .request = bfin_gpiolib_gpio_request,
+ .free = bfin_gpiolib_gpio_free,
+ .base = 0,
+ .ngpio = MAX_BLACKFIN_GPIOS,
+};
+
+static int __init bfin_gpiolib_setup(void)
+{
+ return gpiochip_add(&bfin_chip);
+}
+arch_initcall(bfin_gpiolib_setup);
+#endif