From 6fb0c4a74239416b572f088a827d5ff783902380 Mon Sep 17 00:00:00 2001 From: Punit Agrawal Date: Wed, 19 Feb 2014 12:17:02 +0000 Subject: drivers: cci: Extend support to CCI revisions > r1p2 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 Reviewed-by: Will Deacon Signed-off-by: Arnd Bergmann diff --git a/drivers/bus/arm-cci.c b/drivers/bus/arm-cci.c index 962fd35..da485ae 100644 --- a/drivers/bus/arm-cci.c +++ b/drivers/bus/arm-cci.c @@ -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]; } -- cgit v0.10.2