[PATCH 3/3] arm: omap4: support pmu
tom.leiming at gmail.com
tom.leiming at gmail.com
Tue Mar 1 08:17:14 EST 2011
From: Ming Lei <tom.leiming at gmail.com>
This patch supports pmu irq routed from CTI, so
make pmu/perf working on OMAP4.
The idea is from Woodruff Richard in the disscussion
"Oprofile on Pandaboard / Omap4" of pandaboard at googlegroups.com.
Cc: Woodruff Richard <r-woodruff2 at ti.com>
Cc: Tony Lindgren <tony at atomide.com>
Cc: linux-omap at vger.kernel.org
Signed-off-by: Ming Lei <tom.leiming at gmail.com>
---
arch/arm/mach-omap2/devices.c | 54 ++++++++++++++++++++++++++++++++++++++++-
1 files changed, 53 insertions(+), 1 deletions(-)
diff --git a/arch/arm/mach-omap2/devices.c b/arch/arm/mach-omap2/devices.c
index 71f099b..54e9705 100644
--- a/arch/arm/mach-omap2/devices.c
+++ b/arch/arm/mach-omap2/devices.c
@@ -34,6 +34,7 @@
#include "mux.h"
#include "control.h"
+#include "dbg44xx.h"
#if defined(CONFIG_VIDEO_OMAP2) || defined(CONFIG_VIDEO_OMAP2_MODULE)
@@ -347,19 +348,70 @@ static struct resource omap3_pmu_resource = {
.flags = IORESOURCE_IRQ,
};
+static struct resource omap4_pmu_resource[] = {
+ {
+ .start = OMAP44XX_IRQ_CTI0,
+ .end = OMAP44XX_IRQ_CTI0,
+ .flags = IORESOURCE_IRQ,
+ },
+ {
+ .start = OMAP44XX_IRQ_CTI1,
+ .end = OMAP44XX_IRQ_CTI1,
+ .flags = IORESOURCE_IRQ,
+ }
+};
+
static struct platform_device omap_pmu_device = {
.name = "arm-pmu",
.id = ARM_PMU_DEVICE_CPU,
.num_resources = 1,
};
+struct pmu_platform_data omap4_pmu_data;
+
+static void omap4_configure_pmu_irq(void)
+{
+ void *base0;
+ void *base1;
+
+ base0 = ioremap(OMAP4430_CTI0_BASE, 4096);
+ base1 = ioremap(OMAP4430_CTI1_BASE, 4096);
+ if (!base0 && !base1) {
+ pr_err("ioremap for omap4 CTI failed\n");
+ return;
+ }
+
+ /*configure CTI0 for pmu irq routing*/
+ cti_init(&omap4_pmu_data.cti[0], base0,
+ OMAP44XX_IRQ_CTI0, 6);
+ cti_unlock(&omap4_pmu_data.cti[0]);
+ cti_map_trigger(&omap4_pmu_data.cti[0],
+ 1, 6, 2);
+
+ /*configure CTI1 for pmu irq routing*/
+ cti_init(&omap4_pmu_data.cti[1], base1,
+ OMAP44XX_IRQ_CTI1, 6);
+ cti_unlock(&omap4_pmu_data.cti[1]);
+ cti_map_trigger(&omap4_pmu_data.cti[1],
+ 1, 6, 3);
+
+ omap4_pmu_data.cti_cnt = 2;
+ omap4_pmu_data.use_cti_irq = 1;
+}
+
static void omap_init_pmu(void)
{
if (cpu_is_omap24xx())
omap_pmu_device.resource = &omap2_pmu_resource;
else if (cpu_is_omap34xx())
omap_pmu_device.resource = &omap3_pmu_resource;
- else
+ else if (cpu_is_omap44xx()) {
+ omap_pmu_device.resource = omap4_pmu_resource;
+ omap_pmu_device.num_resources = 2;
+ omap_pmu_device.dev.platform_data = &omap4_pmu_data;
+
+ omap4_configure_pmu_irq();
+ } else
return;
platform_device_register(&omap_pmu_device);
--
1.7.3
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