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authorLinus Walleij <linus.walleij@linaro.org>2015-10-24 00:15:52 +0200
committerMarc Zyngier <marc.zyngier@arm.com>2015-12-16 15:30:50 +0000
commit8673c1d7e8f0cc69b84c1c3356d869b74385fca7 (patch)
treea5f10a5022d6dbf45580519d4b547f9f2df0a762 /include/linux/irqchip
parent126aebd0557815f0d982c81a3ed9cd251f443de6 (diff)
irqchip/gic: Support RealView variant setup
The ARM RealView PB11MPCore reference design has some special bits in a system controller register to set up the GIC in one of three modes: legacy, new with DCC, new without DCC. The register is also used to enable FIQ. Since the platform will not boot unless this register is set up to "new with DCC" mode, we need a special quirk to be compiled-in for the RealView platforms. If we find the right compatible string on the GIC TestChip, we enable this quirk by looking up the system controller and enabling the special bits. We depend on the CONFIG_REALVIEW_DT Kconfig symbol as the old boardfile code has the same fix hardcoded, and this is only needed for the attempts to modernize the RealView code using device tree. After fixing this, the PB11MPCore boots with device tree only. Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Jason Cooper <jason@lakedaemon.net> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'include/linux/irqchip')
-rw-r--r--include/linux/irqchip/arm-gic.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/irqchip/arm-gic.h b/include/linux/irqchip/arm-gic.h
index bae69e5d693c..d0a29db73bc7 100644
--- a/include/linux/irqchip/arm-gic.h
+++ b/include/linux/irqchip/arm-gic.h
@@ -103,6 +103,16 @@ struct device_node;
void gic_cascade_irq(unsigned int gic_nr, unsigned int irq);
int gic_cpu_if_down(unsigned int gic_nr);
+/*
+ * Subdrivers that need some preparatory work can initialize their
+ * chips and call this to register their GICs.
+ */
+int gic_of_init(struct device_node *node, struct device_node *parent);
+
+/*
+ * Legacy platforms not converted to DT yet must use this to init
+ * their GIC
+ */
void gic_init(unsigned int nr, int start,
void __iomem *dist , void __iomem *cpu);