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authorJisheng Zhang <jszhang@marvell.com>2014-11-12 14:22:54 +0800
committerJason Cooper <jason@lakedaemon.net>2014-11-26 16:08:03 +0000
commit1655b0530d9502e69686220491ffb15ba0738c58 (patch)
tree75f481550ee9ab5bcd20503ec3a73c4241726102 /drivers/irqchip
parenta9d5fcc00e715354d3fec1e8009c5895b5ba65ba (diff)
downloadlinux-1655b0530d9502e69686220491ffb15ba0738c58.tar.bz2
irqchip: dw-apb-ictl: Add PM support
This patch adds in support for S2R for dw-apb-ictl irqchip driver. We can used relaxed variants in the resume hook because there's no DMA at all here, the device type memory attribute can ensure the operations order and relaxed version imply compiler barrier. Signed-off-by: Jisheng Zhang <jszhang@marvell.com> Link: https://lkml.kernel.org/r/1415773374-4629-4-git-send-email-jszhang@marvell.com Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Diffstat (limited to 'drivers/irqchip')
-rw-r--r--drivers/irqchip/irq-dw-apb-ictl.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/irqchip/irq-dw-apb-ictl.c b/drivers/irqchip/irq-dw-apb-ictl.c
index c136b67740de..53bb7326a60a 100644
--- a/drivers/irqchip/irq-dw-apb-ictl.c
+++ b/drivers/irqchip/irq-dw-apb-ictl.c
@@ -50,6 +50,21 @@ static void dw_apb_ictl_handler(unsigned int irq, struct irq_desc *desc)
chained_irq_exit(chip, desc);
}
+#ifdef CONFIG_PM
+static void dw_apb_ictl_resume(struct irq_data *d)
+{
+ struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
+ struct irq_chip_type *ct = irq_data_get_chip_type(d);
+
+ irq_gc_lock(gc);
+ writel_relaxed(~0, gc->reg_base + ct->regs.enable);
+ writel_relaxed(*ct->mask_cache, gc->reg_base + ct->regs.mask);
+ irq_gc_unlock(gc);
+}
+#else
+#define dw_apb_ictl_resume NULL
+#endif /* CONFIG_PM */
+
static int __init dw_apb_ictl_init(struct device_node *np,
struct device_node *parent)
{
@@ -127,13 +142,17 @@ static int __init dw_apb_ictl_init(struct device_node *np,
gc->reg_base = iobase;
gc->chip_types[0].regs.mask = APB_INT_MASK_L;
+ gc->chip_types[0].regs.enable = APB_INT_ENABLE_L;
gc->chip_types[0].chip.irq_mask = irq_gc_mask_set_bit;
gc->chip_types[0].chip.irq_unmask = irq_gc_mask_clr_bit;
+ gc->chip_types[0].chip.irq_resume = dw_apb_ictl_resume;
if (nrirqs > 32) {
gc->chip_types[1].regs.mask = APB_INT_MASK_H;
+ gc->chip_types[1].regs.enable = APB_INT_ENABLE_H;
gc->chip_types[1].chip.irq_mask = irq_gc_mask_set_bit;
gc->chip_types[1].chip.irq_unmask = irq_gc_mask_clr_bit;
+ gc->chip_types[1].chip.irq_resume = dw_apb_ictl_resume;
}
irq_set_handler_data(irq, gc);