From 8da55bb2586a0867b9cf14f107225f382a47b28f Mon Sep 17 00:00:00 2001 From: Shinya Kuribayashi Date: Sat, 21 Mar 2009 22:06:14 +0900 Subject: [PATCH] MIPS: EMMA2RH: Use handle_edge_irq() handler for GPIO interrupts EMMA's GPIO interrupts are latched by GPIO interrupt status register. In this case, we're encouraged to use handle_edge_irq() handler. The following changes are made along with replacing set_irq_chip() with set_irq_chip_and_handler_name(,,handle_edge_irq,"edge"): * Fix emma2rh_gpio_irq_ack not to disable interrupts With handle_edge_irq(), we're not expected to disable interrupts when chip->ack is served, so fix it accordingly. We also add a new emma2rh_gpio_irq_mask_ack() for chip->mask_ack operation, instead. * Remove emma2rh_gpio_irq_end(), as chip->end is no longer served. Signed-off-by: Shinya Kuribayashi Signed-off-by: Ralf Baechle --- arch/mips/emma/markeins/irq.c | 28 ++++++++++------------------ 1 file changed, 10 insertions(+), 18 deletions(-) diff --git a/arch/mips/emma/markeins/irq.c b/arch/mips/emma/markeins/irq.c index 263132d7b3a3..1e6457ca4f44 100644 --- a/arch/mips/emma/markeins/irq.c +++ b/arch/mips/emma/markeins/irq.c @@ -148,6 +148,12 @@ static void emma2rh_gpio_irq_disable(unsigned int irq) } static void emma2rh_gpio_irq_ack(unsigned int irq) +{ + irq -= EMMA2RH_GPIO_IRQ_BASE; + emma2rh_out32(EMMA2RH_GPIO_INT_ST, ~(1 << irq)); +} + +static void emma2rh_gpio_irq_mask_ack(unsigned int irq) { u32 reg; @@ -159,27 +165,12 @@ static void emma2rh_gpio_irq_ack(unsigned int irq) emma2rh_out32(EMMA2RH_GPIO_INT_MASK, reg); } -static void emma2rh_gpio_irq_end(unsigned int irq) -{ - u32 reg; - - if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS))) { - - irq -= EMMA2RH_GPIO_IRQ_BASE; - - reg = emma2rh_in32(EMMA2RH_GPIO_INT_MASK); - reg |= 1 << irq; - emma2rh_out32(EMMA2RH_GPIO_INT_MASK, reg); - } -} - struct irq_chip emma2rh_gpio_irq_controller = { .name = "emma2rh_gpio_irq", .ack = emma2rh_gpio_irq_ack, .mask = emma2rh_gpio_irq_disable, - .mask_ack = emma2rh_gpio_irq_ack, + .mask_ack = emma2rh_gpio_irq_mask_ack, .unmask = emma2rh_gpio_irq_enable, - .end = emma2rh_gpio_irq_end, }; void emma2rh_gpio_irq_init(void) @@ -187,8 +178,9 @@ void emma2rh_gpio_irq_init(void) u32 i; for (i = 0; i < NUM_EMMA2RH_IRQ_GPIO; i++) - set_irq_chip(EMMA2RH_GPIO_IRQ_BASE + i, - &emma2rh_gpio_irq_controller); + set_irq_chip_and_handler_name(EMMA2RH_GPIO_IRQ_BASE + i, + &emma2rh_gpio_irq_controller, + handle_edge_irq, "edge"); } static struct irqaction irq_cascade = {