Commit dc4409c0 authored by Punit Agrawal's avatar Punit Agrawal Committed by Arnd Bergmann
Browse files

drivers: cci: Export CCI PMU revision 



The event numbering changed between revision r0 and r1 of the CCI
PMU. Expose this to userspace to allow tooling to handle the
differences in event numbers.

Suggested-by: default avatarDrew Richardson <Drew.Richardson@arm.com>
Signed-off-by: default avatarPunit Agrawal <punit.agrawal@arm.com>
Reviewed-by: default avatarWill Deacon <will.deacon@arm.com>
Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
parent 6fb0c4a7

drivers/bus/arm-cci.c

+10 −2
Original line number Diff line number Diff line
@@ -31,7 +31,6 @@ 


#define DRIVER_NAME		"CCI-400"

#define DRIVER_NAME_PMU		DRIVER_NAME " PMU"

#define PMU_NAME		"CCI_400"



#define CCI_PORT_CTRL		0x0

#define CCI_CTRL_STATUS		0xc
@@ -162,6 +161,15 @@ static struct pmu_port_event_ranges port_event_range[] = { 
	},

};



/*

 * Export different PMU names for the different revisions so userspace knows

 * because the event ids are different

 */

static char *const pmu_names[] = {

	[CCI_REV_R0] = "CCI_400",

	[CCI_REV_R1] = "CCI_400_r1",

};



struct cci_pmu_drv_data {

	void __iomem *base;

	struct arm_pmu *cci_pmu;
@@ -520,7 +528,7 @@ static void pmu_write_counter(struct perf_event *event, u32 value) 
static int cci_pmu_init(struct arm_pmu *cci_pmu, struct platform_device *pdev)

{

	*cci_pmu = (struct arm_pmu){

		.name             = PMU_NAME,

		.name		  = pmu_names[probe_cci_revision()],

		.max_period       = (1LLU << 32) - 1,

		.get_hw_events    = pmu_get_hw_events,

		.get_event_idx    = pmu_get_event_idx,