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Blackfin arch: unify peripheral_request() to reduce arch differences 

Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
This commit is contained in:
Mike Frysinger 2008-10-28 15:49:59 +08:00 committed by Bryan Wu
parent 1f7d373f47
commit 6c7ec0ec93
1 changed files with 11 additions and 78 deletions
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87
arch/blackfin/kernel/bfin_gpio.c
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@ -870,7 +870,6 @@ EXPORT_SYMBOL(get_gpio_dir);
* MODIFICATION HISTORY : * MODIFICATION HISTORY :
**************************************************************/ **************************************************************/
#ifdef BF548_FAMILY
int peripheral_request(unsigned short per, const char *label) int peripheral_request(unsigned short per, const char *label)
{ {
unsigned long flags; unsigned long flags;
@ -886,11 +885,12 @@ int peripheral_request(unsigned short per, const char *label)
if (!(per & P_DEFINED)) if (!(per & P_DEFINED))
return -ENODEV; return -ENODEV;
if (check_gpio(ident) < 0) if (check_gpio(ident))
return -EINVAL; return -EINVAL;
local_irq_save(flags); local_irq_save(flags);
/* Can't do GPIO and peripheral at the same time */
if (unlikely(reserved_gpio_map[gpio_bank(ident)] & gpio_bit(ident))) { if (unlikely(reserved_gpio_map[gpio_bank(ident)] & gpio_bit(ident))) {
dump_stack(); dump_stack();
printk(KERN_ERR printk(KERN_ERR
@ -902,15 +902,18 @@ int peripheral_request(unsigned short per, const char *label)
if (unlikely(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident))) { if (unlikely(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident))) {
u16 funct = get_portmux(ident);
/* /*
* Pin functions like AMC address strobes my * Pin functions like AMC address strobes my
* be requested and used by several drivers * be requested and used by several drivers
*/ */
if (!((per & P_MAYSHARE) && (funct == P_FUNCT2MUX(per)))) { #ifdef BF548_FAMILY
u16 funct = get_portmux(ident);
if (!((per & P_MAYSHARE) && (funct == P_FUNCT2MUX(per)))) {
#else
if (!(per & P_MAYSHARE)) {
#endif
/* /*
* Allow that the identical pin function can * Allow that the identical pin function can
* be requested from the same driver twice * be requested from the same driver twice
@ -931,89 +934,19 @@ int peripheral_request(unsigned short per, const char *label)
anyway: anyway:
reserved_peri_map[gpio_bank(ident)] |= gpio_bit(ident); reserved_peri_map[gpio_bank(ident)] |= gpio_bit(ident);
#ifdef BF548_FAMILY
portmux_setup(ident, P_FUNCT2MUX(per)); portmux_setup(ident, P_FUNCT2MUX(per));
port_setup(ident, PERIPHERAL_USAGE);
local_irq_restore(flags);
set_label(ident, label);
return 0;
}
EXPORT_SYMBOL(peripheral_request);
#else #else
int peripheral_request(unsigned short per, const char *label)
{
unsigned long flags;
unsigned short ident = P_IDENT(per);
/*
* Don't cares are pins with only one dedicated function
*/
if (per & P_DONTCARE)
return 0;
if (!(per & P_DEFINED))
return -ENODEV;
local_irq_save(flags);
if (!check_gpio(ident)) {
if (unlikely(reserved_gpio_map[gpio_bank(ident)] & gpio_bit(ident))) {
dump_stack();
printk(KERN_ERR
"%s: Peripheral %d is already reserved as GPIO by %s !\n",
__func__, ident, get_label(ident));
local_irq_restore(flags);
return -EBUSY;
}
}
if (unlikely(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident))) {
/*
* Pin functions like AMC address strobes my
* be requested and used by several drivers
*/
if (!(per & P_MAYSHARE)) {
/*
* Allow that the identical pin function can
* be requested from the same driver twice
*/
if (cmp_label(ident, label) == 0)
goto anyway;
dump_stack();
printk(KERN_ERR
"%s: Peripheral %d function %d is already"
" reserved by %s !\n",
__func__, ident, P_FUNCT2MUX(per),
get_label(ident));
local_irq_restore(flags);
return -EBUSY;
}
}
anyway:
portmux_setup(per, P_FUNCT2MUX(per)); portmux_setup(per, P_FUNCT2MUX(per));
#endif
port_setup(ident, PERIPHERAL_USAGE); port_setup(ident, PERIPHERAL_USAGE);
reserved_peri_map[gpio_bank(ident)] |= gpio_bit(ident);
local_irq_restore(flags); local_irq_restore(flags);
set_label(ident, label); set_label(ident, label);
return 0; return 0;
} }
EXPORT_SYMBOL(peripheral_request); EXPORT_SYMBOL(peripheral_request);
#endif
int peripheral_request_list(const unsigned short per[], const char *label) int peripheral_request_list(const unsigned short per[], const char *label)
{ {