From: Abhijeet Dharmapurikar <adhar...@quicinc.com> Add gic_set_type callback to set an irq as level or edge triggered type
Signed-off-by: Abhijeet Dharmapurikar <adhar...@quicinc.com> --- arch/arm/common/gic.c | 43 +++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 43 insertions(+), 0 deletions(-) diff --git a/arch/arm/common/gic.c b/arch/arm/common/gic.c index 00172c4..709cf53 100644 --- a/arch/arm/common/gic.c +++ b/arch/arm/common/gic.c @@ -165,6 +165,48 @@ static void gic_handle_cascade_irq(unsigned int irq, struct irq_desc *desc) chip->unmask(irq); } +static int gic_set_type(unsigned int irq, unsigned int flow_type) +{ + unsigned int register_index; + unsigned int bit_index; + unsigned int reg_value; + + if (irq > 1020) + return -1; + + /* + * Two bits each, calc the register and bit, 16 per 32 bit register + * accessible long word only + * But the field is NxN 1xN and rising/falling + */ + register_index = (irq/16)<<2; + bit_index = (irq & 0xF)<<1; + + spin_lock(&irq_controller_lock); + reg_value = readl(gic_dist_base(irq) + GIC_DIST_CONFIG + + register_index); + /* + * keep the nxn and 1xn , mask the edge level + * Edge is 1, level 0 + */ + reg_value = (reg_value & ~(2<<bit_index)); + if (flow_type & (IRQ_TYPE_EDGE_RISING|IRQ_TYPE_EDGE_FALLING)) { + reg_value |= (2<<bit_index); + writel(reg_value, gic_dist_base(irq) + GIC_DIST_CONFIG + + register_index); + __set_irq_handler_unlocked(irq, handle_edge_irq); + } + + if (flow_type & (IRQ_TYPE_LEVEL_HIGH|IRQ_TYPE_LEVEL_LOW)) { + writel(reg_value, gic_dist_base(irq) + GIC_DIST_CONFIG + + register_index); + __set_irq_handler_unlocked(irq, handle_level_irq); + } + + spin_unlock(&irq_controller_lock); + return 0; +} + static struct irq_chip gic_chip = { .name = "GIC", .ack = gic_ack_irq, @@ -174,6 +216,7 @@ static struct irq_chip gic_chip = { #ifdef CONFIG_SMP .set_affinity = gic_set_cpu, #endif + .set_type = gic_set_type, }; void __init gic_cascade_irq(unsigned int gic_nr, unsigned int irq) -- 1.5.6.3 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html