From patchwork Fri Oct 27 07:29:37 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anshuman Khandual X-Patchwork-Id: 738730 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6FE1F8489 for ; Fri, 27 Oct 2023 07:30:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=none Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 27FDB116; Fri, 27 Oct 2023 00:30:01 -0700 (PDT) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 7B8551570; Fri, 27 Oct 2023 00:30:42 -0700 (PDT) Received: from a077893.arm.com (unknown [10.163.32.209]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 4C79A3F762; Fri, 27 Oct 2023 00:29:56 -0700 (PDT) From: Anshuman Khandual To: linux-arm-kernel@lists.infradead.org, suzuki.poulose@arm.com Cc: Anshuman Khandual , Lorenzo Pieralisi , Sudeep Holla , Mike Leach , James Clark , Maxime Coquelin , Alexandre Torgue , linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, coresight@lists.linaro.org, linux-stm32@st-md-mailman.stormreply.com Subject: [PATCH 1/7] coresight: replicator: Move ACPI support from AMBA driver to platform driver Date: Fri, 27 Oct 2023 12:59:37 +0530 Message-Id: <20231027072943.3418997-2-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20231027072943.3418997-1-anshuman.khandual@arm.com> References: <20231027072943.3418997-1-anshuman.khandual@arm.com> Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Add support for the dynamic replicator device in the platform driver, which can then be used on ACPI based platforms. This change would now allow runtime power management for repliacator devices on ACPI based systems. The driver would try to enable the APB clock if available. Also, rename the code to reflect the fact that it now handles both static and dynamic replicators. Cc: Lorenzo Pieralisi Cc: Sudeep Holla Cc: Suzuki K Poulose Cc: Mike Leach Cc: James Clark Cc: linux-acpi@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Cc: coresight@lists.linaro.org Signed-off-by: Anshuman Khandual --- drivers/acpi/arm64/amba.c | 1 - .../coresight/coresight-replicator.c | 44 ++++++++++++------- 2 files changed, 27 insertions(+), 18 deletions(-) diff --git a/drivers/acpi/arm64/amba.c b/drivers/acpi/arm64/amba.c index 60be8ee1dbdc..ac59ce50de07 100644 --- a/drivers/acpi/arm64/amba.c +++ b/drivers/acpi/arm64/amba.c @@ -27,7 +27,6 @@ static const struct acpi_device_id amba_id_list[] = { {"ARMHC503", 0}, /* ARM CoreSight Debug */ {"ARMHC979", 0}, /* ARM CoreSight TPIU */ {"ARMHC97C", 0}, /* ARM CoreSight SoC-400 TMC, SoC-600 ETF/ETB */ - {"ARMHC98D", 0}, /* ARM CoreSight Dynamic Replicator */ {"ARMHC9CA", 0}, /* ARM CoreSight CATU */ {"ARMHC9FF", 0}, /* ARM CoreSight Dynamic Funnel */ {"", 0}, diff --git a/drivers/hwtracing/coresight/coresight-replicator.c b/drivers/hwtracing/coresight/coresight-replicator.c index b6be73034996..64de0bee02ec 100644 --- a/drivers/hwtracing/coresight/coresight-replicator.c +++ b/drivers/hwtracing/coresight/coresight-replicator.c @@ -38,6 +38,7 @@ DEFINE_CORESIGHT_DEVLIST(replicator_devs, "replicator"); struct replicator_drvdata { void __iomem *base; struct clk *atclk; + struct clk *pclk; struct coresight_device *csdev; spinlock_t spinlock; bool check_idfilter_val; @@ -243,6 +244,10 @@ static int replicator_probe(struct device *dev, struct resource *res) return ret; } + drvdata->pclk = coresight_get_enable_apb_pclk(dev); + if (IS_ERR(drvdata->pclk)) + return -ENODEV; + /* * Map the device base for dynamic-replicator, which has been * validated by AMBA core @@ -301,16 +306,16 @@ static int replicator_remove(struct device *dev) return 0; } -static int static_replicator_probe(struct platform_device *pdev) +static int replicator_platform_probe(struct platform_device *pdev) { + struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); int ret; pm_runtime_get_noresume(&pdev->dev); pm_runtime_set_active(&pdev->dev); pm_runtime_enable(&pdev->dev); - /* Static replicators do not have programming base */ - ret = replicator_probe(&pdev->dev, NULL); + ret = replicator_probe(&pdev->dev, res); if (ret) { pm_runtime_put_noidle(&pdev->dev); @@ -320,7 +325,7 @@ static int static_replicator_probe(struct platform_device *pdev) return ret; } -static int static_replicator_remove(struct platform_device *pdev) +static int replicator_platform_remove(struct platform_device *pdev) { replicator_remove(&pdev->dev); pm_runtime_disable(&pdev->dev); @@ -335,6 +340,8 @@ static int replicator_runtime_suspend(struct device *dev) if (drvdata && !IS_ERR(drvdata->atclk)) clk_disable_unprepare(drvdata->atclk); + if (drvdata && !IS_ERR_OR_NULL(drvdata->pclk)) + clk_disable_unprepare(drvdata->pclk); return 0; } @@ -345,6 +352,8 @@ static int replicator_runtime_resume(struct device *dev) if (drvdata && !IS_ERR(drvdata->atclk)) clk_prepare_enable(drvdata->atclk); + if (drvdata && !IS_ERR_OR_NULL(drvdata->pclk)) + clk_prepare_enable(drvdata->pclk); return 0; } #endif @@ -354,31 +363,32 @@ static const struct dev_pm_ops replicator_dev_pm_ops = { replicator_runtime_resume, NULL) }; -static const struct of_device_id static_replicator_match[] = { +static const struct of_device_id replicator_match[] = { {.compatible = "arm,coresight-replicator"}, {.compatible = "arm,coresight-static-replicator"}, {} }; -MODULE_DEVICE_TABLE(of, static_replicator_match); +MODULE_DEVICE_TABLE(of, replicator_match); #ifdef CONFIG_ACPI -static const struct acpi_device_id static_replicator_acpi_ids[] = { +static const struct acpi_device_id replicator_acpi_ids[] = { {"ARMHC985", 0}, /* ARM CoreSight Static Replicator */ + {"ARMHC98D", 0}, /* ARM CoreSight Dynamic Replicator */ {} }; -MODULE_DEVICE_TABLE(acpi, static_replicator_acpi_ids); +MODULE_DEVICE_TABLE(acpi, replicator_acpi_ids); #endif -static struct platform_driver static_replicator_driver = { - .probe = static_replicator_probe, - .remove = static_replicator_remove, +static struct platform_driver replicator_driver = { + .probe = replicator_platform_probe, + .remove = replicator_platform_remove, .driver = { - .name = "coresight-static-replicator", + .name = "coresight-replicator", /* THIS_MODULE is taken care of by platform_driver_register() */ - .of_match_table = of_match_ptr(static_replicator_match), - .acpi_match_table = ACPI_PTR(static_replicator_acpi_ids), + .of_match_table = of_match_ptr(replicator_match), + .acpi_match_table = ACPI_PTR(replicator_acpi_ids), .pm = &replicator_dev_pm_ops, .suppress_bind_attrs = true, }, @@ -419,7 +429,7 @@ static int __init replicator_init(void) { int ret; - ret = platform_driver_register(&static_replicator_driver); + ret = platform_driver_register(&replicator_driver); if (ret) { pr_info("Error registering platform driver\n"); return ret; @@ -428,7 +438,7 @@ static int __init replicator_init(void) ret = amba_driver_register(&dynamic_replicator_driver); if (ret) { pr_info("Error registering amba driver\n"); - platform_driver_unregister(&static_replicator_driver); + platform_driver_unregister(&replicator_driver); } return ret; @@ -436,7 +446,7 @@ static int __init replicator_init(void) static void __exit replicator_exit(void) { - platform_driver_unregister(&static_replicator_driver); + platform_driver_unregister(&replicator_driver); amba_driver_unregister(&dynamic_replicator_driver); }