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drivers: cci: Extend support to CCI revisions > r1p2

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The driver queries the CCI IP revision to distinguish between r0 and r1
scheme for event numbers and currently supports upto version r1p2. To
minimise code churn every time there's a new version of the IP, assume
that event numbering doesn't change for revisions > r1p0 (which is
the case).

The driver will still need an update for future revisions that change
the event numbers.

Signed-off-by: Punit Agrawal <punit.agrawal@arm.com>
Reviewed-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Punit Agrawal 2014-02-19 12:17:02 +00:00 committed by Arnd Bergmann
parent 23453853e4
commit 6fb0c4a742
1 changed files with 3 additions and 9 deletions
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12
drivers/bus/arm-cci.c
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@ -88,8 +88,7 @@ static unsigned long cci_ctrl_phys;
#define CCI_REV_R0 0
#define CCI_REV_R1 1
#define CCI_REV_R0_P4 4
#define CCI_REV_R1_P2 6
#define CCI_REV_R1_PX 5
#define CCI_PMU_EVT_SEL 0x000
#define CCI_PMU_CNTR 0x004
@ -193,21 +192,16 @@ static int probe_cci_revision(void)
rev = readl_relaxed(cci_ctrl_base + CCI_PID2) & CCI_PID2_REV_MASK;
rev >>= CCI_PID2_REV_SHIFT;
if (rev <= CCI_REV_R0_P4)
if (rev < CCI_REV_R1_PX)
return CCI_REV_R0;
else if (rev <= CCI_REV_R1_P2)
else
return CCI_REV_R1;
return -ENOENT;
}
static struct pmu_port_event_ranges *port_range_by_rev(void)
{
int rev = probe_cci_revision();
if (rev < 0)
return NULL;
return &port_event_range[rev];
}