Re: [PATCHv2 2/4] arm-cci: Get the status of a counter

From: Suzuki K. Poulose
Date: Wed Nov 04 2015 - 13:20:22 EST

On 04/11/15 18:06, Mark Rutland wrote:
On Tue, Oct 20, 2015 at 02:05:24PM +0100, Suzuki K. Poulose wrote:
Add helper routines to get the counter status and the event
programmed on it.

+static u32 pmu_get_counter_ctrl(struct cci_pmu *cci_pmu, int idx)
+ return pmu_read_register(cci_pmu, idx, CCI_PMU_CNTR_CTRL) & 0x1;

Given the function is called pmu_get_counter_ctrl, why the '& 1'?

Thats because the Count Control has only 1 bit defined. The rest is RES0.

Either this should return the raw value, or the function should be
renamed to something like pmu_counter_is_enabled, and made bool.

Makes sense. I will change it to pmu_counter_is_enabled().


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