diff options
Diffstat (limited to 'arch/blackfin/kernel/bfin_gpio.c')
| -rw-r--r-- | arch/blackfin/kernel/bfin_gpio.c | 89 |
1 files changed, 11 insertions, 78 deletions
diff --git a/arch/blackfin/kernel/bfin_gpio.c b/arch/blackfin/kernel/bfin_gpio.c index 4aa3c053297..8d12853a64f 100644 --- a/arch/blackfin/kernel/bfin_gpio.c +++ b/arch/blackfin/kernel/bfin_gpio.c @@ -870,7 +870,6 @@ EXPORT_SYMBOL(get_gpio_dir); * MODIFICATION HISTORY : **************************************************************/ -#ifdef BF548_FAMILY int peripheral_request(unsigned short per, const char *label) { unsigned long flags; @@ -886,15 +885,16 @@ int peripheral_request(unsigned short per, const char *label) if (!(per & P_DEFINED)) return -ENODEV; - if (check_gpio(ident) < 0) + if (check_gpio(ident)) return -EINVAL; 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))) { dump_stack(); printk(KERN_ERR - "%s: Peripheral %d is already reserved as GPIO by %s !\n", + "%s: Peripheral %d is already reserved as GPIO by %s !\n", __func__, ident, get_label(ident)); local_irq_restore(flags); return -EBUSY; @@ -902,15 +902,18 @@ int peripheral_request(unsigned short per, const char *label) if (unlikely(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident))) { - u16 funct = get_portmux(ident); - /* * Pin functions like AMC address strobes my * 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 * be requested from the same driver twice @@ -931,89 +934,19 @@ int peripheral_request(unsigned short per, const char *label) anyway: reserved_peri_map[gpio_bank(ident)] |= gpio_bit(ident); +#ifdef BF548_FAMILY 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 - -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)); - +#endif port_setup(ident, PERIPHERAL_USAGE); - reserved_peri_map[gpio_bank(ident)] |= gpio_bit(ident); local_irq_restore(flags); set_label(ident, label); return 0; } EXPORT_SYMBOL(peripheral_request); -#endif int peripheral_request_list(const unsigned short per[], const char *label) { |