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Message-ID: <4c3572f8-9710-0955-72c6-a9907ce6ce8b@arm.com>
Date: Tue, 30 May 2023 10:57:16 +0100
From: Suzuki K Poulose <suzuki.poulose@....com>
To: Anshuman Khandual <anshuman.khandual@....com>,
linux-arm-kernel@...ts.infradead.org, coresight@...ts.linaro.org,
"Rafael J. Wysocki" <rafael@...nel.org>,
Len Brown <lenb@...nel.org>
Cc: scclevenger@...amperecomputing.com,
Ganapatrao Kulkarni <gankulkarni@...amperecomputing.com>,
Rob Herring <robh+dt@...nel.org>,
Frank Rowand <frowand.list@...il.com>,
Russell King <linux@...linux.org.uk>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
"Rafael J. Wysocki" <rafael@...nel.org>,
Len Brown <lenb@...nel.org>,
Sudeep Holla <sudeep.holla@....com>,
Lorenzo Pieralisi <lpieralisi@...nel.org>,
Mathieu Poirier <mathieu.poirier@...aro.org>,
Mike Leach <mike.leach@...aro.org>,
Leo Yan <leo.yan@...aro.org>, devicetree@...r.kernel.org,
linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V5 6/6] coresight: etm4x: Add ACPI support in platform
driver
Hi Rafael
On 29/05/2023 07:25, Anshuman Khandual wrote:
> From: Suzuki K Poulose <suzuki.poulose@....com>
>
> Drop ETM4X ACPI ID from the AMBA ACPI device list, and instead just move it
> inside the new ACPI devices list detected and used via platform driver.
>
> Cc: "Rafael J. Wysocki" <rafael@...nel.org>
> Cc: Len Brown <lenb@...nel.org>
> Cc: Mathieu Poirier <mathieu.poirier@...aro.org>
> Cc: Suzuki K Poulose <suzuki.poulose@....com>
> Cc: Mike Leach <mike.leach@...aro.org>
> Cc: Leo Yan <leo.yan@...aro.org>
> Cc: Sudeep Holla <sudeep.holla@....com>
> Cc: Lorenzo Pieralisi <lpieralisi@...nel.org>
> Cc: linux-acpi@...r.kernel.org
> Cc: coresight@...ts.linaro.org
> Cc: linux-arm-kernel@...ts.infradead.org
> Cc: linux-kernel@...r.kernel.org
> Reviewed-by: Sudeep Holla <sudeep.holla@....com> (for ACPI specific changes)
> Signed-off-by: Suzuki K Poulose <suzuki.poulose@....com>
> Signed-off-by: Anshuman Khandual <anshuman.khandual@....com>
> ---
> drivers/acpi/acpi_amba.c | 1 -
We would like to push this via the coresight tree. Please could you Ack
this change if you are happy with the proposal and the change ?
Suzuki
> drivers/hwtracing/coresight/coresight-etm4x-core.c | 10 ++++++++++
> 2 files changed, 10 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/acpi/acpi_amba.c b/drivers/acpi/acpi_amba.c
> index f5b443ab01c2..099966cbac5a 100644
> --- a/drivers/acpi/acpi_amba.c
> +++ b/drivers/acpi/acpi_amba.c
> @@ -22,7 +22,6 @@
> static const struct acpi_device_id amba_id_list[] = {
> {"ARMH0061", 0}, /* PL061 GPIO Device */
> {"ARMH0330", 0}, /* ARM DMA Controller DMA-330 */
> - {"ARMHC500", 0}, /* ARM CoreSight ETM4x */
> {"ARMHC501", 0}, /* ARM CoreSight ETR */
> {"ARMHC502", 0}, /* ARM CoreSight STM */
> {"ARMHC503", 0}, /* ARM CoreSight Debug */
> diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c
> index e10f6676dd9b..fd6f9dff5881 100644
> --- a/drivers/hwtracing/coresight/coresight-etm4x-core.c
> +++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c
> @@ -3,6 +3,7 @@
> * Copyright (c) 2014, The Linux Foundation. All rights reserved.
> */
>
> +#include <linux/acpi.h>
> #include <linux/bitops.h>
> #include <linux/kernel.h>
> #include <linux/moduleparam.h>
> @@ -2344,12 +2345,21 @@ static const struct of_device_id etm4_sysreg_match[] = {
> {}
> };
>
> +#ifdef CONFIG_ACPI
> +static const struct acpi_device_id etm4x_acpi_ids[] = {
> + {"ARMHC500", 0}, /* ARM CoreSight ETM4x */
> + {}
> +};
> +MODULE_DEVICE_TABLE(acpi, etm4x_acpi_ids);
> +#endif
> +
> static struct platform_driver etm4_platform_driver = {
> .probe = etm4_probe_platform_dev,
> .remove = etm4_remove_platform_dev,
> .driver = {
> .name = "coresight-etm4x",
> .of_match_table = etm4_sysreg_match,
> + .acpi_match_table = ACPI_PTR(etm4x_acpi_ids),
> .suppress_bind_attrs = true,
> .pm = &etm4_dev_pm_ops,
> },
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