linux-kernel - Re: [PATCHv6 6/6] coresight: debug: Add Unique Component Identifier (UCI) table

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Date:   Thu, 31 Jan 2019 18:01:59 +0000
From:   Suzuki K Poulose <suzuki.poulose@....com>
To:     saiprakash.ranjan@...eaurora.org, robh+dt@...nel.org,
        mathieu.poirier@...aro.org, mike.leach@...aro.org,
        leo.yan@...aro.org, alexander.shishkin@...ux.intel.com,
        andy.gross@...aro.org, david.brown@...aro.org,
        vivek.gautam@...eaurora.org, jhugo@...eaurora.org,
        dianders@...omium.org, sboyd@...nel.org,
        bjorn.andersson@...aro.org, devicetree@...r.kernel.org,
        mark.rutland@....com, marc.w.gonzalez@...e.fr
Cc:     rnayak@...eaurora.org, sibis@...eaurora.org,
        tingwei@...eaurora.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org
Subject: Re: [PATCHv6 6/6] coresight: debug: Add Unique Component Identifier
 (UCI) table



On 31/01/2019 14:22, Sai Prakash Ranjan wrote:
> Add UCI table for coresight CPU debug module. This patch adds
> the UCI entries for Kryo CPUs found on MSM8996 which shares
> the same PIDs as ETMs.
> 
> Without this, below error is observed on MSM8996:

nit: Subject doesn't match the patch contents. You could simply say :

coresight: cpu-debug: Add support for Qualcomm Kryo


> 
> [    5.429867] OF: graph: no port node found in /soc/debug@...0000
> [    5.429938] coresight-etm4x: probe of 3810000.debug failed with error -22
> [    5.435415] coresight-cpu-debug 3810000.debug: Coresight debug-CPU0 initialized
> [    5.446474] OF: graph: no port node found in /soc/debug@...0000
> [    5.448927] coresight-etm4x: probe of 3910000.debug failed with error -22
> [    5.454681] coresight-cpu-debug 3910000.debug: Coresight debug-CPU1 initialized
> [    5.487765] OF: graph: no port node found in /soc/debug@...0000
> [    5.488007] coresight-etm4x: probe of 3a10000.debug failed with error -22
> [    5.493024] coresight-cpu-debug 3a10000.debug: Coresight debug-CPU2 initialized
> [    5.501802] OF: graph: no port node found in /soc/debug@...0000
> [    5.512901] coresight-etm4x: probe of 3b10000.debug failed with error -22
> [    5.513192] coresight-cpu-debug 3b10000.debug: Coresight debug-CPU3 initialized
> 
> Signed-off-by: Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>
> 
> ---
> For testing, all dependent patches are in below tree:
>   * https://github.com/saiprakash-ranjan/linux/tree/coresight-next
> 
> This patch depends on UCI support by Mike Leach in below link:
>   * https://lore.kernel.org/lkml/20190130234051.2294-1-mike.leach@linaro.org/
> ---
>   .../hwtracing/coresight/coresight-cpu-debug.c | 33 +++++++++----------
>   1 file changed, 16 insertions(+), 17 deletions(-)
> 
> diff --git a/drivers/hwtracing/coresight/coresight-cpu-debug.c b/drivers/hwtracing/coresight/coresight-cpu-debug.c
> index e8819d750938..915d86a39cee 100644
> --- a/drivers/hwtracing/coresight/coresight-cpu-debug.c
> +++ b/drivers/hwtracing/coresight/coresight-cpu-debug.c
> @@ -655,24 +655,23 @@ static int debug_remove(struct amba_device *adev)
>   	return 0;
>   }
>   
> +static struct amba_cs_uci_id uci_id_debug[] = {

As Stephen mentioned, this must be "const".

Rest looks fine.

Suzuki