diff options
Diffstat (limited to 'arch/blackfin/kernel')
| -rw-r--r-- | arch/blackfin/kernel/bfin_gpio.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/arch/blackfin/kernel/bfin_gpio.c b/arch/blackfin/kernel/bfin_gpio.c index ce85d4bf34c..ea13d2a22d6 100644 --- a/arch/blackfin/kernel/bfin_gpio.c +++ b/arch/blackfin/kernel/bfin_gpio.c @@ -83,6 +83,7 @@ #include <linux/delay.h> #include <linux/module.h> #include <linux/err.h> +#include <linux/proc_fs.h> #include <asm/blackfin.h> #include <asm/gpio.h> #include <asm/portmux.h> @@ -1194,3 +1195,36 @@ void bfin_gpio_reset_spi0_ssel1(void) } #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 \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 \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 |