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SubjectRe: [PATCH 1/3] include: dt-bindings: add Performance Monitoring Unit for Exynos
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Hi Lukasz,

On 19. 4. 17. 오후 4:48, Lukasz Luba wrote:
> This patch add support of a new feature which can be used in DT:
> Performance Monitoring Unit with defined event data type.
> In this patch the event data types are defined for Exynos PPMU.
> The patch also updates the MAINTAINERS file accordingly.
>
> Signed-off-by: Lukasz Luba <l.luba@partner.samsung.com>
> ---
> MAINTAINERS | 5 +++++
> include/dt-bindings/pmu/exynos_ppmu.h | 24 ++++++++++++++++++++++++
> 2 files changed, 29 insertions(+)
> create mode 100644 include/dt-bindings/pmu/exynos_ppmu.h
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 3671fde..f4aac78 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -12376,6 +12376,11 @@ L: linux-scsi@vger.kernel.org
> S: Supported
> F: drivers/scsi/pm8001/
>
> +PMU EXYNOS DT BINDINGS
> +M: Lukasz Luba <l.luba@partner.samsung.com>
> +S: Maintained
> +F: include/dt-bindings/pmu/exynos_ppmu.h
> +

IMHO, I'm not sure that it is right of adding one dt-binding header file
to MAINTAINERS file. If right, I'm OK.


> PNP SUPPORT
> M: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
> S: Maintained
> diff --git a/include/dt-bindings/pmu/exynos_ppmu.h b/include/dt-bindings/pmu/exynos_ppmu.h
> new file mode 100644
> index 0000000..a6971eb
> --- /dev/null
> +++ b/include/dt-bindings/pmu/exynos_ppmu.h
> @@ -0,0 +1,24 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Samsung Exynos PPMU event types for counting in regs
> + *
> + * Copyright (c) 2019, Samsung
> + * Author: Lukasz Luba <l.luba@partner.samsung.com>
> + */
> +
> +#ifndef __DT_BINDINGS_PMU_EXYNOS_PPMU_H
> +#define __DT_BINDINGS_PMU_EXYNOS_PPMU_H
> +
> +
> +#define PPMU_RO_BUSY_CYCLE_CNT 0x0
> +#define PPMU_WO_BUSY_CYCLE_CNT 0x1
> +#define PPMU_RW_BUSY_CYCLE_CNT 0x2
> +#define PPMU_RO_REQUEST_CNT 0x3
> +#define PPMU_WO_REQUEST_CNT 0x4
> +#define PPMU_RO_DATA_CNT 0x5
> +#define PPMU_WO_DATA_CNT 0x6
> +#define PPMU_RO_LATENCY 0x12
> +#define PPMU_WO_LATENCY 0x16
> +#define PPMU_V2_EVT3_RW_DATA_CNT 0x22

If we can select the data type for monitoring, it looks good to me.
But, when I developed the Exynos PPMU, I has not tested other data type
except for PPMU_RO_DATA_CNT and PPMU_WO_DATA_CNT.

Do you test all data types with PPMU device?

> +
> +#endif
>


--
Best Regards,
Chanwoo Choi
Samsung Electronics

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