From e2a8092c3fa9766248e9515252ae44e6df2d97a0 Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Fri, 15 Apr 2011 12:51:33 -0400 Subject: [PATCH] Blackfin: bf537: fix excessive gpio int demuxing The search logic in the gpio demux walks all possible gpio blocks starting at the specified pin. The trouble on bf537 parts when we demux the port F and port G mask A interrupts is that we also demux port H mask A ints. Most of the time this isn't an issue as people don't usually use port H, but might as well avoid it when possible. Signed-off-by: Mike Frysinger --- arch/blackfin/mach-common/ints-priority.c | 55 ++++++++++++++----------------- 1 file changed, 25 insertions(+), 30 deletions(-) diff --git a/arch/blackfin/mach-common/ints-priority.c b/arch/blackfin/mach-common/ints-priority.c index a77f96f9be7..ad28eb12003 100644 --- a/arch/blackfin/mach-common/ints-priority.c +++ b/arch/blackfin/mach-common/ints-priority.c @@ -567,22 +567,41 @@ static int bfin_gpio_set_wake(struct irq_data *d, unsigned int state) # define bfin_gpio_set_wake NULL #endif +static void bfin_demux_gpio_block(unsigned int irq) +{ + unsigned int gpio, mask; + + gpio = irq_to_gpio(irq); + mask = get_gpiop_data(gpio) & get_gpiop_maska(gpio); + + while (mask) { + if (mask & 1) + bfin_handle_irq(irq); + irq++; + mask >>= 1; + } +} + static void bfin_demux_gpio_irq(unsigned int inta_irq, struct irq_desc *desc) { - unsigned int i, gpio, mask, irq, search = 0; + unsigned int irq; switch (inta_irq) { -#if defined(CONFIG_BF53x) +#if defined(BF537_FAMILY) case IRQ_PROG_INTA: - irq = IRQ_PF0; - search = 1; + bfin_demux_gpio_block(IRQ_PF0); + irq = IRQ_PG0; break; -# if defined(BF537_FAMILY) && !(defined(CONFIG_BFIN_MAC) || defined(CONFIG_BFIN_MAC_MODULE)) +# if !(defined(CONFIG_BFIN_MAC) || defined(CONFIG_BFIN_MAC_MODULE)) case IRQ_MAC_RX: irq = IRQ_PH0; break; # endif +#elif defined(BF533_FAMILY) + case IRQ_PROG_INTA: + irq = IRQ_PF0; + break; #elif defined(BF538_FAMILY) case IRQ_PORTF_INTA: irq = IRQ_PF0; @@ -613,31 +632,7 @@ static void bfin_demux_gpio_irq(unsigned int inta_irq, return; } - if (search) { - for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) { - irq += i; - - mask = get_gpiop_data(i) & get_gpiop_maska(i); - - while (mask) { - if (mask & 1) - bfin_handle_irq(irq); - irq++; - mask >>= 1; - } - } - } else { - gpio = irq_to_gpio(irq); - mask = get_gpiop_data(gpio) & get_gpiop_maska(gpio); - - do { - if (mask & 1) - bfin_handle_irq(irq); - irq++; - mask >>= 1; - } while (mask); - } - + bfin_demux_gpio_block(irq); } #else /* CONFIG_BF54x */ -- 2.11.4.GIT