linux-kernel - Re: [PATCH 07/10 v3] coresight-etm: add CoreSight ETM/PTM driver

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Date:	Fri, 8 Aug 2014 07:28:44 +0200
From:	Dirk Behme <dirk.behme@...bosch.com>
To:	<mathieu.poirier@...aro.org>
CC:	<linus.walleij@...aro.org>, <will.deacon@....com>,
	<linux@....linux.org.uk>, <robherring2@...il.com>,
	<daniel.thompson@...aro.org>, <robbelibobban@...il.com>,
	<Al.Grant@....com>, <patches@...aro.org>,
	<marcin.jabrzyk@...il.com>, <linux-kernel@...r.kernel.org>,
	<panchaxari.prasannamurthy@...aro.org>, <r.sengupta@...sung.com>,
	<arve@...roid.com>, <Tony.Armitstead@....com>,
	<john.stultz@...aro.org>, <linux-arm-kernel@...ts.infradead.org>,
	<james.king@...aro.org>, <pratikp@...eaurora.org>,
	<varshney@...com>, <jonas.svennebring@...gotech.com>
Subject: Re: [PATCH 07/10 v3] coresight-etm: add CoreSight ETM/PTM driver

On 07.08.2014 20:21, mathieu.poirier@...aro.org wrote:
> From: Pratik Patel <pratikp@...eaurora.org>
>
> This driver manages CoreSight ETM (Embedded Trace Macrocell) that
> supports processor tracing. Currently supported version are ARM
> ETMv3.x and PTM1.x.
>
> Signed-off-by: Pratik Patel <pratikp@...eaurora.org>
> Signed-off-by: Panchaxari Prasannamurthy <panchaxari.prasannamurthy@...aro.org>
> Signed-off-by: Mathieu Poirier <mathieu.poirier@...aro.org>
> ---
...
> +static struct amba_id etm_ids[] = {
> +	{	/* ETM 3.3 */
> +		.id	= 0x0003b921,
> +		.mask	= 0x0003ffff,
> +	},
> +	{	/* ETM 3.5 */
> +		.id	= 0x0003b956,
> +		.mask	= 0x0003ffff,
> +	},
> +	{	/* PTM */
> +		.id	= 0x0003b95f,
> +		.mask	= 0x0003ffff,
> +	},
> +	{ 0, 0},

Maybe you like to add PTM 1.0 [1] here, too?

Best regards

Dirk

[1]

diff --git a/drivers/coresight/coresight-etm.c 
b/drivers/coresight/coresight-etm.c
index 6f5dbc7..a7a08e6 100644
--- a/drivers/coresight/coresight-etm.c
+++ b/drivers/coresight/coresight-etm.c
@@ -1284,6 +1284,8 @@ static bool etm_arch_supported(u8 arch)
  		break;
  	case ETM_ARCH_V3_5:
  		break;
+	case PFT_ARCH_V1_0:
+		break;
  	case PFT_ARCH_V1_1:
  		break;
  	default:
@@ -1418,6 +1420,7 @@ static int etm_probe(struct amba_device *adev, 
const struct amba_id *id)
  	put_online_cpus();

  	if (etm_arch_supported(drvdata->arch) == false) {
+		dev_err(dev, "ETM arch 0x%02x not supported\n", drvdata->arch);
  		ret = -EINVAL;
  		goto err_arch_supported;
  	}
@@ -1472,11 +1475,15 @@ static struct amba_id etm_ids[] = {
  		.id	= 0x0003b921,
  		.mask	= 0x0003ffff,
  	},
+	{	/* PTM 1.0 */
+		.id	= 0x0003b950,
+		.mask	= 0x0003ffff,
+	},
  	{	/* ETM 3.5 */
  		.id	= 0x0003b956,
  		.mask	= 0x0003ffff,
  	},
-	{	/* PTM */
+	{	/* PTM 1.1 */
  		.id	= 0x0003b95f,
  		.mask	= 0x0003ffff,
  	},
diff --git a/include/linux/coresight.h b/include/linux/coresight.h
index a19420e..596ec94 100644
--- a/include/linux/coresight.h
+++ b/include/linux/coresight.h
@@ -32,6 +32,7 @@

  #define ETM_ARCH_V3_3		(0x23)
  #define ETM_ARCH_V3_5		(0x25)
+#define PFT_ARCH_V1_0		(0x30)
  #define PFT_ARCH_V1_1		(0x31)

  #define CORESIGHT_UNLOCK	(0xC5ACCE55)

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