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msm: 8x60: gic initialization fixup for RUMI 

On RUMI platform STIs are not enabled by default, contrary to the
GIC spec. The bits for STIs in the enable/enable clear registers
are also RW instead of RO. STIs need to be enabled at initialization
time.

Signed-off-by: Steve Muckle <smuckle@codeaurora.org>
Signed-off-by: Daniel Walker <dwalker@codeaurora.org>
This commit is contained in:
Steve Muckle 2010-02-11 11:50:40 -08:00 committed by Daniel Walker
parent f880c5649e
commit 9161d303af
1 changed files with 20 additions and 0 deletions
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20
arch/arm/mach-msm/board-msm8x60.c
View File

@ -19,6 +19,7 @@
#include <linux/kernel.h> #include <linux/kernel.h>
#include <linux/platform_device.h> #include <linux/platform_device.h>
#include <linux/io.h> #include <linux/io.h>
#include <linux/irq.h>
#include <asm/mach-types.h> #include <asm/mach-types.h>
#include <asm/mach/arch.h> #include <asm/mach/arch.h>
@ -41,9 +42,28 @@ static void __init msm8x60_map_io(void)
static void __init msm8x60_init_irq(void) static void __init msm8x60_init_irq(void)
{ {
unsigned int i;
gic_dist_init(0, MSM_QGIC_DIST_BASE, 1); gic_dist_init(0, MSM_QGIC_DIST_BASE, 1);
gic_cpu_base_addr = (void *)MSM_QGIC_CPU_BASE; gic_cpu_base_addr = (void *)MSM_QGIC_CPU_BASE;
gic_cpu_init(0, MSM_QGIC_CPU_BASE); gic_cpu_init(0, MSM_QGIC_CPU_BASE);
/* Edge trigger PPIs except AVS_SVICINT and AVS_SVICINTSWDONE */
writel(0xFFFFD7FF, MSM_QGIC_DIST_BASE + GIC_DIST_CONFIG + 4);
/* RUMI does not adhere to GIC spec by enabling STIs by default.
* Enable/clear is supposed to be RO for STIs, but is RW on RUMI.
*/
writel(0x0000FFFF, MSM_QGIC_DIST_BASE + GIC_DIST_ENABLE_SET);
/* FIXME: Not installing AVS_SVICINT and AVS_SVICINTSWDONE yet
* as they are configured as level, which does not play nice with
* handle_percpu_irq.
*/
for (i = GIC_PPI_START; i < GIC_SPI_START; i++) {
if (i != AVS_SVICINT && i != AVS_SVICINTSWDONE)
set_irq_handler(i, handle_percpu_irq);
}
} }
static void __init msm8x60_init(void) static void __init msm8x60_init(void)