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| author | Michael Hennerich <michael.hennerich@analog.com> | 2007-10-03 18:36:18 +0200 |
|---|---|---|
| committer | Bryan Wu <bryan.wu@analog.com> | 2007-10-03 18:36:18 +0200 |
| commit | cda6a20b68c1f21f4b4bc9cd3ee08494e7ebf0d5 (patch) | |
| tree | 138cf053600bdf22dea762e8bc2b6e7bc27b64eb /arch/blackfin/kernel/bfin_gpio.c | |
| parent | Blackfin arch: gpio pinmux and resource allocation API required by BF537 on c... (diff) | |
| download | linux-cda6a20b68c1f21f4b4bc9cd3ee08494e7ebf0d5.tar.xz linux-cda6a20b68c1f21f4b4bc9cd3ee08494e7ebf0d5.zip | |
Blackfin arch: fix PORT_J BUG for BF537/6 EMAC driver reported by Kalle Pokki <kalle.pokki@iki.fi>
Cc: Kalle Pokki <kalle.pokki@iki.fi>
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Diffstat (limited to 'arch/blackfin/kernel/bfin_gpio.c')
| -rw-r--r-- | arch/blackfin/kernel/bfin_gpio.c | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/arch/blackfin/kernel/bfin_gpio.c b/arch/blackfin/kernel/bfin_gpio.c index 9f3094800248..5d488ef965ce 100644 --- a/arch/blackfin/kernel/bfin_gpio.c +++ b/arch/blackfin/kernel/bfin_gpio.c @@ -180,11 +180,13 @@ static int cmp_label(unsigned short ident, const char *label) #ifdef BF537_FAMILY static void port_setup(unsigned short gpio, unsigned short usage) { - if (usage == GPIO_USAGE) { - *port_fer[gpio_bank(gpio)] &= ~gpio_bit(gpio); - } else - *port_fer[gpio_bank(gpio)] |= gpio_bit(gpio); - SSYNC(); + if (!check_gpio(gpio)) { + if (usage == GPIO_USAGE) { + *port_fer[gpio_bank(gpio)] &= ~gpio_bit(gpio); + } else + *port_fer[gpio_bank(gpio)] |= gpio_bit(gpio); + SSYNC(); + } } #else # define port_setup(...) do { } while (0) @@ -644,11 +646,10 @@ int peripheral_request(unsigned short per, const char *label) if (!(per & P_DEFINED)) return -ENODEV; - if (check_gpio(ident) < 0) - return -EINVAL; - local_irq_save(flags); + if (!check_gpio(ident)) { + if (unlikely(reserved_gpio_map[gpio_bank(ident)] & gpio_bit(ident))) { printk(KERN_ERR "%s: Peripheral %d is already reserved as GPIO by %s !\n", @@ -658,6 +659,8 @@ int peripheral_request(unsigned short per, const char *label) return -EBUSY; } + } + if (unlikely(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident))) { /* |