linux-kernel - Re: [PATCHv3 2/5] arm-cci: Get the status of a counter

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Date:	Thu, 10 Dec 2015 15:33:13 +0000
From:	Mark Rutland <mark.rutland@....com>
To:	"Suzuki K. Poulose" <suzuki.poulose@....com>
Cc:	linux-arm-kernel@...ts.infradead.org, punit.agrawal@....com,
	arm@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCHv3 2/5] arm-cci: Get the status of a counter

On Tue, Nov 17, 2015 at 06:03:24PM +0000, Suzuki K. Poulose wrote:
> Add helper routines to get the counter status and the event
> programmed on it.
> 
> Cc: Punit Agrawal <punit.agrawal@....com>
> Cc: Mark Rutland <mark.rutland@....com>
> Signed-off-by: Suzuki K. Poulose <suzuki.poulose@....com>
> ---
> Changes since V2:
>  - Rename pmu_counter_get_ctrl => pmu_counter_is_enabled()

Acked-by: Mark Rutland <mark.rutland@....com>

Mark.

> ---
>  drivers/bus/arm-cci.c |   12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 
> diff --git a/drivers/bus/arm-cci.c b/drivers/bus/arm-cci.c
> index f5793b9..48936c8 100644
> --- a/drivers/bus/arm-cci.c
> +++ b/drivers/bus/arm-cci.c
> @@ -652,11 +652,23 @@ static void pmu_enable_counter(struct cci_pmu *cci_pmu, int idx)
>  	pmu_write_register(cci_pmu, 1, idx, CCI_PMU_CNTR_CTRL);
>  }
>  
> +static bool __maybe_unused
> +pmu_counter_is_enabled(struct cci_pmu *cci_pmu, int idx)
> +{
> +	return (pmu_read_register(cci_pmu, idx, CCI_PMU_CNTR_CTRL) & 0x1) != 0;
> +}
> +
>  static void pmu_set_event(struct cci_pmu *cci_pmu, int idx, unsigned long event)
>  {
>  	pmu_write_register(cci_pmu, event, idx, CCI_PMU_EVT_SEL);
>  }
>  
> +static u32 __maybe_unused
> +pmu_get_event(struct cci_pmu *cci_pmu, int idx)
> +{
> +	return pmu_read_register(cci_pmu, idx, CCI_PMU_EVT_SEL);
> +}
> +
>  /*
>   * Returns the number of programmable counters actually implemented
>   * by the cci
> -- 
> 1.7.9.5
> 
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