[PATCH 2/5] ARM: gic: Add distributor and interface enable/disable accessory api

Santosh Shilimkar
2011-01-24T08:51:50Z

The power management code needs to have access to enable/disable the
gic cpu interface and distributor based on targetted low power
states.

This patch adds and exports one API each for distributor and cpu
interface enable/disable.

Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
---
arch/arm/common/gic.c | 24 ++++++++++++++++++++++++
arch/arm/include/asm/hardware/gic.h | 2 ++
2 files changed, 26 insertions(+), 0 deletions(-)

diff --git a/arch/arm/common/gic.c b/arch/arm/common/gic.c
index b4a9ea7..6384bb7 100644
--- a/arch/arm/common/gic.c
+++ b/arch/arm/common/gic.c
@@ -369,6 +369,30 @@ void __cpuinit gic_enable_ppi(unsigned int irq)
local_irq_restore(flags);
}

+/* Used in power management paths */
+void gic_secondary_set(unsigned int gic_nr, unsigned int on)
+{
+ BUG_ON(gic_nr >= MAX_GIC_NR);
+
+ if (on) {
+ __raw_writel(0xf0, gic_data[gic_nr].cpu_base + GIC_CPU_PRIMASK);
+ __raw_writel(1, gic_data[gic_nr].cpu_base + GIC_CPU_CTRL);
+
+ } else {
+ __raw_writel(0, gic_data[gic_nr].cpu_base + GIC_CPU_CTRL);
+ }
+}
+
+void gic_dist_set(unsigned int gic_nr, unsigned int on)
+{
+ BUG_ON(gic_nr >= MAX_GIC_NR);
+
+ if (on)
+ __raw_writel(0x1, gic_data[gic_nr].dist_base + GIC_DIST_CTRL);
+ else
+ __raw_writel(0, gic_data[gic_nr].cpu_base + GIC_CPU_CTRL);
+}
+
#ifdef CONFIG_SMP
void gic_raise_softirq(const struct cpumask *mask, unsigned int irq)
{
diff --git a/arch/arm/include/asm/hardware/gic.h b/arch/arm/include/asm/hardware/gic.h
index 0691f9d..638d9dc 100644
--- a/arch/arm/include/asm/hardware/gic.h
+++ b/arch/arm/include/asm/hardware/gic.h
@@ -41,6 +41,8 @@ void gic_secondary_init(unsigned int);
void gic_cascade_irq(unsigned int gic_nr, unsigned int irq);
void gic_raise_softirq(const struct cpumask *mask, unsigned int irq);
void gic_enable_ppi(unsigned int);
+void gic_secondary_set(unsigned int gic_nr, unsigned int on);
+void gic_dist_set(unsigned int gic_nr, unsigned int on);
#endif

#endif
--
1.6.0.4