linux-kernel - [PATCH] coresight: acpi: Static funnel support

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Message-Id: <20190726160839.12478-1-suzuki.poulose@arm.com>
Date:   Fri, 26 Jul 2019 17:08:39 +0100
From:   Suzuki K Poulose <suzuki.poulose@....com>
To:     linux-arm-kernel@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org, mathieu.poirier@...aro.org,
        coresight@...ts.linaro.org,
        Suzuki K Poulose <suzuki.poulose@....com>
Subject: [PATCH] coresight: acpi: Static funnel support

The ACPI bindings for CoreSight has been updated to add the device
id for non-programmable CoreSight funnels (aka static funnels) as of
v1.1 [0]. Add the ACPI id for static funnels in the driver.

[0] https://static.docs.arm.com/den0067/a/DEN0067_CoreSight_ACPI_1.1.pdf

Signed-off-by: Suzuki K Poulose <suzuki.poulose@....com>
---
 drivers/hwtracing/coresight/coresight-funnel.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/hwtracing/coresight/coresight-funnel.c b/drivers/hwtracing/coresight/coresight-funnel.c
index fa97cb9ab4f9..0c99848a5d69 100644
--- a/drivers/hwtracing/coresight/coresight-funnel.c
+++ b/drivers/hwtracing/coresight/coresight-funnel.c
@@ -5,6 +5,7 @@
  * Description: CoreSight Funnel driver
  */
 
+#include <linux/acpi.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/types.h>
@@ -302,11 +303,19 @@ static const struct of_device_id static_funnel_match[] = {
 	{}
 };
 
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id static_funnel_ids[] = {
+	{"ARMHC9FE", 0},
+	{},
+};
+#endif
+
 static struct platform_driver static_funnel_driver = {
 	.probe          = static_funnel_probe,
 	.driver         = {
 		.name   = "coresight-static-funnel",
 		.of_match_table = static_funnel_match,
+		.acpi_match_table = ACPI_PTR(static_funnel_ids),
 		.pm	= &funnel_dev_pm_ops,
 		.suppress_bind_attrs = true,
 	},
-- 
2.21.0