diff options
author | Michael Hennerich <michael.hennerich@analog.com> | 2008-04-24 00:10:10 (GMT) |
---|---|---|
committer | Bryan Wu <cooloney@kernel.org> | 2008-04-24 00:10:10 (GMT) |
commit | affee2b2613ada262eecea354b6c60696ca5d482 (patch) | |
tree | bc8b5b7a11416f565635b0b135a4438e17e64230 /arch/blackfin/mach-common/ints-priority.c | |
parent | a086ee2268abcfcbf80a114f4602e5b26aa80bf0 (diff) | |
download | linux-fsl-qoriq-affee2b2613ada262eecea354b6c60696ca5d482.tar.xz |
[Blackfin] arch: Allow concurrent use of GPIO and GPIO IRQ
The irq setup code no longer calls gpio request and free.
This patch also changes the default gpio_free behavior on Blackfin.
A freed GPIO keeps it's last state, and is not defaulted back to
an input. This is also what all other architectures do.
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Diffstat (limited to 'arch/blackfin/mach-common/ints-priority.c')
-rw-r--r-- | arch/blackfin/mach-common/ints-priority.c | 52 |
1 files changed, 13 insertions, 39 deletions
diff --git a/arch/blackfin/mach-common/ints-priority.c b/arch/blackfin/mach-common/ints-priority.c index a2a1171..5448230 100644 --- a/arch/blackfin/mach-common/ints-priority.c +++ b/arch/blackfin/mach-common/ints-priority.c @@ -326,6 +326,7 @@ static void bfin_demux_error_irq(unsigned int int_err_irq, static unsigned short gpio_enabled[gpio_bank(MAX_BLACKFIN_GPIOS)]; static unsigned short gpio_edge_triggered[gpio_bank(MAX_BLACKFIN_GPIOS)]; +extern void bfin_gpio_irq_prepare(unsigned gpio); static void bfin_gpio_ack_irq(unsigned int irq) { @@ -364,35 +365,25 @@ static void bfin_gpio_unmask_irq(unsigned int irq) static unsigned int bfin_gpio_irq_startup(unsigned int irq) { - unsigned int ret; u16 gpionr = irq - IRQ_PF0; - char buf[8]; - if (!(gpio_enabled[gpio_bank(gpionr)] & gpio_bit(gpionr))) { - snprintf(buf, sizeof buf, "IRQ %d", irq); - ret = gpio_request(gpionr, buf); - if (ret) - return ret; - } + if (!(gpio_enabled[gpio_bank(gpionr)] & gpio_bit(gpionr))) + bfin_gpio_irq_prepare(gpionr); gpio_enabled[gpio_bank(gpionr)] |= gpio_bit(gpionr); bfin_gpio_unmask_irq(irq); - return ret; + return 0; } static void bfin_gpio_irq_shutdown(unsigned int irq) { bfin_gpio_mask_irq(irq); - gpio_free(irq - IRQ_PF0); gpio_enabled[gpio_bank(irq - IRQ_PF0)] &= ~gpio_bit(irq - IRQ_PF0); } static int bfin_gpio_irq_type(unsigned int irq, unsigned int type) { - - unsigned int ret; - char buf[8]; u16 gpionr = irq - IRQ_PF0; if (type == IRQ_TYPE_PROBE) { @@ -404,12 +395,8 @@ static int bfin_gpio_irq_type(unsigned int irq, unsigned int type) if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW)) { - if (!(gpio_enabled[gpio_bank(gpionr)] & gpio_bit(gpionr))) { - snprintf(buf, sizeof buf, "IRQ %d", irq); - ret = gpio_request(gpionr, buf); - if (ret) - return ret; - } + if (!(gpio_enabled[gpio_bank(gpionr)] & gpio_bit(gpionr))) + bfin_gpio_irq_prepare(gpionr); gpio_enabled[gpio_bank(gpionr)] |= gpio_bit(gpionr); } else { @@ -595,6 +582,8 @@ static struct pin_int_t *pint[NR_PINT_SYS_IRQS] = { (struct pin_int_t *)PINT3_MASK_SET, }; +extern void bfin_gpio_irq_prepare(unsigned gpio); + inline unsigned short get_irq_base(u8 bank, u8 bmap) { @@ -697,8 +686,6 @@ static void bfin_gpio_unmask_irq(unsigned int irq) static unsigned int bfin_gpio_irq_startup(unsigned int irq) { - unsigned int ret; - char buf[8]; u16 gpionr = irq_to_gpio(irq); u8 pint_val = irq2pint_lut[irq - SYS_IRQS]; @@ -709,17 +696,13 @@ static unsigned int bfin_gpio_irq_startup(unsigned int irq) return -ENODEV; } - if (!(gpio_enabled[gpio_bank(gpionr)] & gpio_bit(gpionr))) { - snprintf(buf, sizeof buf, "IRQ %d", irq); - ret = gpio_request(gpionr, buf); - if (ret) - return ret; - } + if (!(gpio_enabled[gpio_bank(gpionr)] & gpio_bit(gpionr))) + bfin_gpio_irq_prepare(gpionr); gpio_enabled[gpio_bank(gpionr)] |= gpio_bit(gpionr); bfin_gpio_unmask_irq(irq); - return ret; + return 0; } static void bfin_gpio_irq_shutdown(unsigned int irq) @@ -727,15 +710,12 @@ static void bfin_gpio_irq_shutdown(unsigned int irq) u16 gpionr = irq_to_gpio(irq); bfin_gpio_mask_irq(irq); - gpio_free(gpionr); gpio_enabled[gpio_bank(gpionr)] &= ~gpio_bit(gpionr); } static int bfin_gpio_irq_type(unsigned int irq, unsigned int type) { - unsigned int ret; - char buf[8]; u16 gpionr = irq_to_gpio(irq); u8 pint_val = irq2pint_lut[irq - SYS_IRQS]; u32 pintbit = PINT_BIT(pint_val); @@ -753,12 +733,8 @@ static int bfin_gpio_irq_type(unsigned int irq, unsigned int type) if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW)) { - if (!(gpio_enabled[gpio_bank(gpionr)] & gpio_bit(gpionr))) { - snprintf(buf, sizeof buf, "IRQ %d", irq); - ret = gpio_request(gpionr, buf); - if (ret) - return ret; - } + if (!(gpio_enabled[gpio_bank(gpionr)] & gpio_bit(gpionr))) + bfin_gpio_irq_prepare(gpionr); gpio_enabled[gpio_bank(gpionr)] |= gpio_bit(gpionr); } else { @@ -766,8 +742,6 @@ static int bfin_gpio_irq_type(unsigned int irq, unsigned int type) return 0; } - gpio_direction_input(gpionr); - if ((type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_LEVEL_LOW))) pint[bank]->invert_set = pintbit; /* low or falling edge denoted by one */ else |