linux-kernel - [PATCHv7 6/6] coresight: cpu-debug: Add support for Qualcomm Kryo

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Message-Id: <53cf9d9d3b14f503a6c842754f3c55413f5a3392.1548981329.git.saiprakash.ranjan@codeaurora.org>
Date:   Fri,  1 Feb 2019 06:23:14 +0530
From:   Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>
To:     Rob Herring <robh+dt@...nel.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Mike Leach <mike.leach@...aro.org>,
        Leo Yan <leo.yan@...aro.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Andy Gross <andy.gross@...aro.org>,
        David Brown <david.brown@...aro.org>,
        Vivek Gautam <vivek.gautam@...eaurora.org>,
        Jeffrey Hugo <jhugo@...eaurora.org>,
        Doug Anderson <dianders@...omium.org>,
        Stephen Boyd <sboyd@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        devicetree@...r.kernel.org, Mark Rutland <mark.rutland@....com>,
        Marc Gonzalez <marc.w.gonzalez@...e.fr>
Cc:     Rajendra Nayak <rnayak@...eaurora.org>,
        Sibi Sankar <sibis@...eaurora.org>,
        Tingwei Zhang <tingwei@...eaurora.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org,
        Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>
Subject: [PATCHv7 6/6] coresight: cpu-debug: Add support for Qualcomm Kryo

Add support for coresight CPU debug module on Qualcomm
Kryo CPUs. 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:

[    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..50ebf5b7fa4f 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 const struct amba_cs_uci_id uci_id_debug[] = {
+	{
+		/*  CPU Debug UCI data */
+		.devarch	= 0x47706a15,
+		.devarch_mask	= 0xfff0ffff,
+		.devtype	= 0x00000015,
+	}
+};
+
 static const struct amba_id debug_ids[] = {
-	{       /* Debug for Cortex-A53 */
-		.id	= 0x000bbd03,
-		.mask	= 0x000fffff,
-	},
-	{       /* Debug for Cortex-A57 */
-		.id	= 0x000bbd07,
-		.mask	= 0x000fffff,
-	},
-	{       /* Debug for Cortex-A72 */
-		.id	= 0x000bbd08,
-		.mask	= 0x000fffff,
-	},
-	{       /* Debug for Cortex-A73 */
-		.id	= 0x000bbd09,
-		.mask	= 0x000fffff,
-	},
-	{ 0, 0 },
+	CS_AMBA_ID(0x000bbd03),				/* Cortex-A53 */
+	CS_AMBA_ID(0x000bbd07),				/* Cortex-A57 */
+	CS_AMBA_ID(0x000bbd08),				/* Cortex-A72 */
+	CS_AMBA_ID(0x000bbd09),				/* Cortex-A73 */
+	CS_AMBA_UCI_ID(0x000f0205, uci_id_debug),	/* Qualcomm Kryo */
+	CS_AMBA_UCI_ID(0x000f0211, uci_id_debug),	/* Qualcomm Kryo */
+	{},
 };
 
 static struct amba_driver debug_driver = {
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation