On big-endian systems readl/writel may perform an unwanted endian swap,
breaking generic-chip.c. Let the platform code opt to use the __raw_
variants by selecting RAW_IRQ_ACCESSORS.
This is required in order for bcm3384 to use GENERIC_IRQ_CHIP. Several
existing irqchip drivers also use the __raw_ accessors directly, so it
is a reasonably common requirement.
Signed-off-by: Kevin Cernekee <cerne...@gmail.com>
---
drivers/irqchip/Kconfig | 3 +++
include/linux/irq.h | 13 +++++++++++++
2 files changed, 16 insertions(+)
diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
index b21f12f..6f0e80b 100644
--- a/drivers/irqchip/Kconfig
+++ b/drivers/irqchip/Kconfig
@@ -2,6 +2,9 @@ config IRQCHIP
def_bool y
depends on OF_IRQ
+config RAW_IRQ_ACCESSORS
+ bool
+
config ARM_GIC
bool
select IRQ_DOMAIN
diff --git a/include/linux/irq.h b/include/linux/irq.h
index 03f48d9..ed1ea8a 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -639,6 +639,17 @@ void arch_teardown_hwirq(unsigned int irq);
void irq_init_desc(unsigned int irq);
#endif
+#ifdef CONFIG_RAW_IRQ_ACCESSORS
+
+#ifndef irq_reg_writel
+# define irq_reg_writel(val, addr) __raw_writel(val, addr)
+#endif
+#ifndef irq_reg_readl
+# define irq_reg_readl(addr) __raw_readl(addr)
+#endif
+
+#else
+
#ifndef irq_reg_writel
# define irq_reg_writel(val, addr) writel(val, addr)
#endif
@@ -646,6 +657,8 @@ void irq_init_desc(unsigned int irq);
# define irq_reg_readl(addr) readl(addr)
#endif
+#endif
+
/**
* struct irq_chip_regs - register offsets for struct irq_gci
* @enable: Enable register offset to reg_base
--
2.1.1
--
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