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authorKevin Cernekee <cernekee@gmail.com>2014-11-06 22:44:19 -0800
committerAlex Shi <alex.shi@linaro.org>2015-11-07 10:12:35 +0800
commitbb34791b119bd47749a646154ae417abea198ee0 (patch)
tree6845578a696f4457172242926b0bda0fbd2659ab /kernel
parente85eb9c8e311a87bd40f97c95fc3855a9a1a9584 (diff)
downloadlinux-linaro-stable-bb34791b119bd47749a646154ae417abea198ee0.tar.gz
genirq: Generic chip: Add big endian I/O accessors
Use io{read,write}32be if the caller specified IRQ_GC_BE_IO when creating the irqchip. Signed-off-by: Kevin Cernekee <cernekee@gmail.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Acked-by: Arnd Bergmann <arnd@arndb.de> Link: https://lkml.kernel.org/r/1415342669-30640-5-git-send-email-cernekee@gmail.com Signed-off-by: Jason Cooper <jason@lakedaemon.net> (cherry picked from commit b79055952badbd73710685643bab44104f2509ea) Signed-off-by: Alex Shi <alex.shi@linaro.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/irq/generic-chip.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/kernel/irq/generic-chip.c b/kernel/irq/generic-chip.c
index db458c68e392..61024e8abdef 100644
--- a/kernel/irq/generic-chip.c
+++ b/kernel/irq/generic-chip.c
@@ -191,6 +191,16 @@ int irq_gc_set_wake(struct irq_data *d, unsigned int on)
return 0;
}
+static u32 irq_readl_be(void __iomem *addr)
+{
+ return ioread32be(addr);
+}
+
+static void irq_writel_be(u32 val, void __iomem *addr)
+{
+ iowrite32be(val, addr);
+}
+
static void
irq_init_generic_chip(struct irq_chip_generic *gc, const char *name,
int num_ct, unsigned int irq_base,
@@ -300,7 +310,13 @@ int irq_alloc_domain_generic_chips(struct irq_domain *d, int irqs_per_chip,
dgc->gc[i] = gc = tmp;
irq_init_generic_chip(gc, name, num_ct, i * irqs_per_chip,
NULL, handler);
+
gc->domain = d;
+ if (gcflags & IRQ_GC_BE_IO) {
+ gc->reg_readl = &irq_readl_be;
+ gc->reg_writel = &irq_writel_be;
+ }
+
raw_spin_lock_irqsave(&gc_lock, flags);
list_add_tail(&gc->list, &gc_list);
raw_spin_unlock_irqrestore(&gc_lock, flags);