[PATCH V2 04/10] ARM: OMAP4430: Create PMU device via HWMOD

[Jon Hunter]

From: Ming Lei <ming.lei at canonical.com>

For OMAP4430 PMU events are routed to the CPU via the cross trigger interface
(CTI) because there are no dedicated interrupts. In order to route the PMU
events via the CTI IRQs, the following modules must be enabled:

        l3_instr, l3_main_3, debugss

Therefore, build the arm-pmu device via these three HWMODs.

Cc: Ming Lei <ming.lei at canonical.com>
Cc: Will Deacon <will.deacon at arm.com>
Cc: Benoit Cousson <b-cousson at ti.com>
Cc: Paul Walmsley <paul at pwsan.com>
Cc: Kevin Hilman <khilman at ti.com>

Signed-off-by: Ming Lei <ming.lei at canonical.com>
Signed-off-by: Will Deacon <will.deacon at arm.com>
Signed-off-by: Jon Hunter <jon-hunter at ti.com>
---
 arch/arm/mach-omap2/pmu.c |   46 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)

diff --git a/arch/arm/mach-omap2/pmu.c b/arch/arm/mach-omap2/pmu.c
index 329e00c..b3b9306 100644
--- a/arch/arm/mach-omap2/pmu.c
+++ b/arch/arm/mach-omap2/pmu.c
@@ -48,10 +48,56 @@ static int __init omap2_init_pmu(void)
 	return 0;
 }
 
+/*
+ * omap4430_init_pmu - creates and registers PMU platform device
+ *
+ * Uses OMAP HWMOD framework to create and register an ARM PMU device.
+ * Only supports OMAP4430 devices that require PMU interrupts to be
+ * routed to the interrupt controller via the coresight cross trigger
+ * interface (CTI). To route the interrpts via the coresight CTI module,
+ * the OMAP modules L3_MAIN_3, L3_INSTR and DEBUGSS need to be active.
+ */
+static int __init omap4430_init_pmu(void)
+{
+	int id = -1;
+	struct omap_hwmod *oh[3];
+	char *oh_name;
+	char *dev_name = "arm-pmu";
+
+	oh_name = "l3_main_3";
+	oh[0] = omap_hwmod_lookup(oh_name);
+	if (!oh[0]) {
+		pr_err("Could not look up %s hwmod\n", oh_name);
+		return -ENODEV;
+	}
+	oh_name = "l3_instr";
+	oh[1] = omap_hwmod_lookup(oh_name);
+	if (!oh[1]) {
+		pr_err("Could not look up %s hwmod\n", oh_name);
+		return -ENODEV;
+	}
+	oh_name = "debugss";
+	oh[2] = omap_hwmod_lookup(oh_name);
+	if (!oh[2]) {
+		pr_err("Could not look up %s hwmod\n", oh_name);
+		return -ENODEV;
+	}
+
+	omap_pmu_dev = omap_device_build_ss(dev_name, id, oh, 3, NULL,
+				0, NULL, 0, 0);
+	WARN(IS_ERR(omap_pmu_dev), "Can't build omap_device for %s.\n",
+				dev_name);
+
+	return 0;
+}
+
 static int __init omap_init_pmu(void)
 {
+
 	if (cpu_is_omap24xx() || cpu_is_omap34xx())
 		return omap2_init_pmu();
+	if (cpu_is_omap443x())
+		return omap4430_init_pmu();
 
 	return 0;
 }
-- 
1.7.9.5