From d2d55ab8ad845807311130a40fc87dd5163f7133 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Sat, 18 Mar 2017 17:53:25 +0100 Subject: [PATCH] irqchip/faraday: Fix the trigger types The triggers in the driver were right for high level triggered IRQs but the edge detection on edge triggered IRQs was wrong. After studying a proper driver from Po-Yu Chuang I now know how to handle these right, and we can properly implement low level IRQs as well. The device trees for the Gemini had polarity switched around so these have been fixed to conform to the right polarity as well. Cc: Greentime Hu Signed-off-by: Linus Walleij Signed-off-by: Marc Zyngier --- drivers/irqchip/irq-ftintc010.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/drivers/irqchip/irq-ftintc010.c b/drivers/irqchip/irq-ftintc010.c index 81929aa33990..0cc81df6f743 100644 --- a/drivers/irqchip/irq-ftintc010.c +++ b/drivers/irqchip/irq-ftintc010.c @@ -26,7 +26,9 @@ #define FT010_IRQ_SOURCE(base_addr) (base_addr + 0x00) #define FT010_IRQ_MASK(base_addr) (base_addr + 0x04) #define FT010_IRQ_CLEAR(base_addr) (base_addr + 0x08) +/* Selects level- or edge-triggered */ #define FT010_IRQ_MODE(base_addr) (base_addr + 0x0C) +/* Selects active low/high or falling/rising edge */ #define FT010_IRQ_POLARITY(base_addr) (base_addr + 0x10) #define FT010_IRQ_STATUS(base_addr) (base_addr + 0x14) #define FT010_FIQ_SOURCE(base_addr) (base_addr + 0x20) @@ -84,22 +86,25 @@ static int ft010_irq_set_type(struct irq_data *d, unsigned int trigger) mode = readl(FT010_IRQ_MODE(f->base)); polarity = readl(FT010_IRQ_POLARITY(f->base)); - if (trigger & (IRQ_TYPE_LEVEL_HIGH)) { + if (trigger & (IRQ_TYPE_LEVEL_LOW)) { + irq_set_handler_locked(d, handle_level_irq); + mode &= ~BIT(offset); + polarity |= BIT(offset); + } else if (trigger & (IRQ_TYPE_LEVEL_HIGH)) { irq_set_handler_locked(d, handle_level_irq); - /* Disable edge detection */ mode &= ~BIT(offset); polarity &= ~BIT(offset); - } else if (trigger & IRQ_TYPE_EDGE_RISING) { + } else if (trigger & IRQ_TYPE_EDGE_FALLING) { irq_set_handler_locked(d, handle_edge_irq); mode |= BIT(offset); polarity |= BIT(offset); - } else if (trigger & IRQ_TYPE_EDGE_FALLING) { + } else if (trigger & IRQ_TYPE_EDGE_RISING) { irq_set_handler_locked(d, handle_edge_irq); mode |= BIT(offset); polarity &= ~BIT(offset); } else { irq_set_handler_locked(d, handle_bad_irq); - pr_warn("GEMINI IRQ: no supported trigger selected for line %d\n", + pr_warn("Faraday IRQ: no supported trigger selected for line %d\n", offset); }