linux-kernel - [PATCH V4 00/11] coresight: Move remaining AMBA ACPI devices into platform driver

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Message-Id: <20240123054608.1790189-1-anshuman.khandual@arm.com>
Date: Tue, 23 Jan 2024 11:15:57 +0530
From: Anshuman Khandual <anshuman.khandual@....com>
To: linux-arm-kernel@...ts.infradead.org,
	suzuki.poulose@....com
Cc: Anshuman Khandual <anshuman.khandual@....com>,
	Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Sudeep Holla <sudeep.holla@....com>,
	Mike Leach <mike.leach@...aro.org>,
	James Clark <james.clark@....com>,
	Maxime Coquelin <mcoquelin.stm32@...il.com>,
	Alexandre Torgue <alexandre.torgue@...s.st.com>,
	linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	coresight@...ts.linaro.org,
	linux-stm32@...md-mailman.stormreply.com
Subject: [PATCH V4 00/11] coresight: Move remaining AMBA ACPI devices into platform driver

This moves remaining AMBA ACPI devices into respective platform drivers for
enabling ACPI based power management support. This series applies on kernel
v6.8-rc1 release. This series has been built, and boot tested on a DT based
coresight platform. Although this still requires some more testing on ACPI
based coresight platforms.

https://git.gitlab.arm.com/linux-arm/linux-anshuman.git (amba_other_acpi_migration_v4)

Cc: Lorenzo Pieralisi <lpieralisi@...nel.org>
Cc: Sudeep Holla <sudeep.holla@....com>
Cc: Suzuki K Poulose <suzuki.poulose@....com>
Cc: Mike Leach <mike.leach@...aro.org>
Cc: James Clark <james.clark@....com>
Cc: Maxime Coquelin <mcoquelin.stm32@...il.com>
Cc: Alexandre Torgue <alexandre.torgue@...s.st.com>
Cc: linux-acpi@...r.kernel.org
Cc: linux-arm-kernel@...ts.infradead.org
Cc: linux-kernel@...r.kernel.org
Cc: coresight@...ts.linaro.org
Cc: linux-stm32@...md-mailman.stormreply.com

Changes in V4:

- Fixed PM imbalance in etm4_probe() error path with pm_runtime_disable()
- Restored back the pm_runtime_disable() on platform probe error paths
  in replicator, funnel, catu, tpiu, tmc and stm devices
- Dropped dev_caps argument from __tmc_probe()
- Changed xxxx_platform_remove() for platform_driver->remove_new() callback

Changes in V3:

https://lore.kernel.org/all/20231208053939.42901-1-anshuman.khandual@arm.com/

- Split coresight_init_driver/remove_driver() helpers into a separate patch
- Added 'drvdata->pclk' comments in replicator, funnel, tpiu, tmc, and stm devices
- Updated funnel, and replicator drivers to use these new helpers
- Check for drvdata instead of drvdata->pclk in suspend and resume paths in catu,
  tmc and debug devices
- Added patch to extract device name from AMBA pid based table lookup for stm
- Added patch to extract device properties from AMBA pid based table look for tmc
- Dropped pm_runtime_put() from common __probe() functions
- Handled pm_runtime_put() in AMBA driver in success path
- Handled pm_runtime_put() in platform driver in both success and error paths

Changes in V2:

https://lore.kernel.org/all/20231201062053.1268492-1-anshuman.khandual@arm.com/

- Dropped redundant devm_ioremap_resource() hunk from tmc_platform_probe()
- Defined coresight_[init|remove]_driver() for both AMBA/platform drivers
- Changed catu, tmc, tpiu, stm and debug coresight drivers to use the new
  helpers avoiding build issues arising from module_amba_driver(), and
  module_platform_driver() being on the same file

Changes in V1:

https://lore.kernel.org/all/20231027072943.3418997-1-anshuman.khandual@arm.com/

- Replaced all IS_ERR() instances with IS_ERR_OR_NULL() as per Suzuki

Changes in RFC:

https://lore.kernel.org/all/20230921042040.1334641-1-anshuman.khandual@arm.com/

Anshuman Khandual (11):
  coresight: etm4x: Fix unbalanced pm_runtime_enable()
  coresight: stm: Extract device name from AMBA pid based table lookup
  coresight: tmc: Extract device properties from AMBA pid based table lookup
  coresight: Add helpers registering/removing both AMBA and platform drivers
  coresight: replicator: Move ACPI support from AMBA driver to platform driver
  coresight: funnel: Move ACPI support from AMBA driver to platform driver
  coresight: catu: Move ACPI support from AMBA driver to platform driver
  coresight: tpiu: Move ACPI support from AMBA driver to platform driver
  coresight: tmc: Move ACPI support from AMBA driver to platform driver
  coresight: stm: Move ACPI support from AMBA driver to platform driver
  coresight: debug: Move ACPI support from AMBA driver to platform driver

 drivers/acpi/arm64/amba.c                     |   8 -
 drivers/hwtracing/coresight/coresight-catu.c  | 142 +++++++++++++---
 drivers/hwtracing/coresight/coresight-catu.h  |   1 +
 drivers/hwtracing/coresight/coresight-core.c  |  29 ++++
 .../hwtracing/coresight/coresight-cpu-debug.c | 141 ++++++++++++++--
 .../coresight/coresight-etm4x-core.c          |   3 +
 .../hwtracing/coresight/coresight-funnel.c    |  86 +++++-----
 drivers/hwtracing/coresight/coresight-priv.h  |  10 ++
 .../coresight/coresight-replicator.c          |  81 ++++-----
 drivers/hwtracing/coresight/coresight-stm.c   | 117 +++++++++++--
 .../hwtracing/coresight/coresight-tmc-core.c  | 158 +++++++++++++++---
 drivers/hwtracing/coresight/coresight-tmc.h   |   2 +
 drivers/hwtracing/coresight/coresight-tpiu.c  | 102 +++++++++--
 include/linux/coresight.h                     |   7 +
 14 files changed, 726 insertions(+), 161 deletions(-)

-- 
2.25.1