colin/u-boot
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

gpio: generalize for all generic gpio providers

Browse Source 
The Blackfin gpio command isn't terribly Blackfin-specific.  So generalize
the few pieces into two new optional helpers:
	name_to_gpio() - turn a string name into a GPIO #
	gpio_status() - display current pin bindings (think /proc/gpio)

Once these pieces are pulled out, we can relocate the cmd_gpio.c into the
common directory.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Mike Frysinger
2011-04-03 04:40:46 -04:00
parent c3d2a17c1e
commit a972b8d701
5 changed files with 140 additions and 119 deletions
Download Patch File Download Diff File Expand all files Collapse all files

53
arch/blackfin/include/asm/gpio.h
View File

@@ -196,6 +196,59 @@ static inline int gpio_is_valid(int number)
return number >= 0 && number < MAX_BLACKFIN_GPIOS;
}
#include <linux/ctype.h>
static inline int name_to_gpio(const char *name)
{
int port_base;
if (tolower(*name) == 'p') {
++name;
switch (tolower(*name)) {
#ifdef GPIO_PA0
case 'a': port_base = GPIO_PA0; break;
#endif
#ifdef GPIO_PB0
case 'b': port_base = GPIO_PB0; break;
#endif
#ifdef GPIO_PC0
case 'c': port_base = GPIO_PC0; break;
#endif
#ifdef GPIO_PD0
case 'd': port_base = GPIO_PD0; break;
#endif
#ifdef GPIO_PE0
case 'e': port_base = GPIO_PE0; break;
#endif
#ifdef GPIO_PF0
case 'f': port_base = GPIO_PF0; break;
#endif
#ifdef GPIO_PG0
case 'g': port_base = GPIO_PG0; break;
#endif
#ifdef GPIO_PH0
case 'h': port_base = GPIO_PH0; break;
#endif
#ifdef GPIO_PI0
case 'i': port_base = GPIO_PI0; break;
#endif
#ifdef GPIO_PJ
case 'j': port_base = GPIO_PJ0; break;
#endif
default: return -1;
}
++name;
} else
port_base = 0;
return port_base + simple_strtoul(name, NULL, 10);
}
#define name_to_gpio(n) name_to_gpio(n)
#define gpio_status() bfin_gpio_labels()
#endif /* __ASSEMBLY__ */
#endif /* __ARCH_BLACKFIN_GPIO_H__ */