From: Anshuman Khandual <anshuman.khandual@arm.com> To: linux-arm-kernel@lists.infradead.org, suzuki.poulose@arm.com Cc: Anshuman Khandual <anshuman.khandual@arm.com>, Lorenzo Pieralisi <lpieralisi@kernel.org>, Sudeep Holla <sudeep.holla@arm.com>, Mike Leach <mike.leach@linaro.org>, James Clark <james.clark@arm.com>, Maxime Coquelin <mcoquelin.stm32@gmail.com>, Alexandre Torgue <alexandre.torgue@foss.st.com>, linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, coresight@lists.linaro.org, linux-stm32@st-md-mailman.stormreply.com Subject: [PATCH V6 07/11] coresight: catu: Move ACPI support from AMBA driver to platform driver Date: Tue, 12 Mar 2024 15:53:14 +0530 [thread overview] Message-ID: <20240312102318.2285165-8-anshuman.khandual@arm.com> (raw) In-Reply-To: <20240312102318.2285165-1-anshuman.khandual@arm.com> Add support for the catu devices in a new platform driver, which can then be used on ACPI based platforms. This change would now allow runtime power management for ACPI based systems. The driver would try to enable the APB clock if available. But first this renames and then refactors catu_probe() and catu_remove(), making sure it can be used both for platform and AMBA drivers. This also moves pm_runtime_put() from catu_probe() to the callers. Cc: Lorenzo Pieralisi <lpieralisi@kernel.org> Cc: Sudeep Holla <sudeep.holla@arm.com> Cc: Suzuki K Poulose <suzuki.poulose@arm.com> Cc: Mike Leach <mike.leach@linaro.org> Cc: James Clark <james.clark@arm.com> Cc: linux-acpi@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Cc: coresight@lists.linaro.org Acked-by: Sudeep Holla <sudeep.holla@arm.com> # For ACPI related changes Reviewed-by: James Clark <james.clark@arm.com> Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> --- Changes in V6: - Added clk_put() for pclk in catu_platform_probe() error path - Added WARN_ON(!drvdata) check in catu_platform_remove() - Added additional elements for acpi_device_id[] drivers/acpi/arm64/amba.c | 1 - drivers/hwtracing/coresight/coresight-catu.c | 146 ++++++++++++++++--- drivers/hwtracing/coresight/coresight-catu.h | 1 + 3 files changed, 125 insertions(+), 23 deletions(-) diff --git a/drivers/acpi/arm64/amba.c b/drivers/acpi/arm64/amba.c index afb6afb66967..587061b0fd2f 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 */ - {"ARMHC9CA", 0}, /* ARM CoreSight CATU */ {"", 0}, }; diff --git a/drivers/hwtracing/coresight/coresight-catu.c b/drivers/hwtracing/coresight/coresight-catu.c index 3949ded0d4fa..8fa035e5a0e8 100644 --- a/drivers/hwtracing/coresight/coresight-catu.c +++ b/drivers/hwtracing/coresight/coresight-catu.c @@ -7,6 +7,8 @@ * Author: Suzuki K Poulose <suzuki.poulose@arm.com> */ +#include <linux/platform_device.h> +#include <linux/acpi.h> #include <linux/amba/bus.h> #include <linux/device.h> #include <linux/dma-mapping.h> @@ -502,31 +504,25 @@ static const struct coresight_ops catu_ops = { .helper_ops = &catu_helper_ops, }; -static int catu_probe(struct amba_device *adev, const struct amba_id *id) +static int __catu_probe(struct device *dev, struct resource *res) { int ret = 0; u32 dma_mask; - struct catu_drvdata *drvdata; + struct catu_drvdata *drvdata = dev_get_drvdata(dev); struct coresight_desc catu_desc; struct coresight_platform_data *pdata = NULL; - struct device *dev = &adev->dev; void __iomem *base; catu_desc.name = coresight_alloc_device_name(&catu_devs, dev); if (!catu_desc.name) return -ENOMEM; - drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL); - if (!drvdata) { - ret = -ENOMEM; - goto out; - } - - dev_set_drvdata(dev, drvdata); - base = devm_ioremap_resource(dev, &adev->res); - if (IS_ERR(base)) { - ret = PTR_ERR(base); - goto out; + if (res) { + base = devm_ioremap_resource(dev, res); + if (IS_ERR(base)) { + ret = PTR_ERR(base); + goto out; + } } /* Setup dma mask for the device */ @@ -567,19 +563,39 @@ static int catu_probe(struct amba_device *adev, const struct amba_id *id) drvdata->csdev = coresight_register(&catu_desc); if (IS_ERR(drvdata->csdev)) ret = PTR_ERR(drvdata->csdev); - else - pm_runtime_put(&adev->dev); out: return ret; } -static void catu_remove(struct amba_device *adev) +static int catu_probe(struct amba_device *adev, const struct amba_id *id) +{ + struct catu_drvdata *drvdata; + int ret; + + drvdata = devm_kzalloc(&adev->dev, sizeof(*drvdata), GFP_KERNEL); + if (!drvdata) + return -ENOMEM; + + amba_set_drvdata(adev, drvdata); + ret = __catu_probe(&adev->dev, &adev->res); + if (!ret) + pm_runtime_put(&adev->dev); + + return ret; +} + +static void __catu_remove(struct device *dev) { - struct catu_drvdata *drvdata = dev_get_drvdata(&adev->dev); + struct catu_drvdata *drvdata = dev_get_drvdata(dev); coresight_unregister(drvdata->csdev); } +static void catu_remove(struct amba_device *adev) +{ + __catu_remove(&adev->dev); +} + static struct amba_id catu_ids[] = { CS_AMBA_ID(0x000bb9ee), {}, @@ -598,13 +614,99 @@ static struct amba_driver catu_driver = { .id_table = catu_ids, }; +static int catu_platform_probe(struct platform_device *pdev) +{ + struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + struct catu_drvdata *drvdata; + int ret = 0; + + drvdata = devm_kzalloc(&pdev->dev, sizeof(*drvdata), GFP_KERNEL); + if (!drvdata) + return -ENOMEM; + + drvdata->pclk = coresight_get_enable_apb_pclk(&pdev->dev); + if (IS_ERR(drvdata->pclk)) + return -ENODEV; + + pm_runtime_get_noresume(&pdev->dev); + pm_runtime_set_active(&pdev->dev); + pm_runtime_enable(&pdev->dev); + + dev_set_drvdata(&pdev->dev, drvdata); + ret = __catu_probe(&pdev->dev, res); + pm_runtime_put(&pdev->dev); + if (ret) { + pm_runtime_disable(&pdev->dev); + if (drvdata && !IS_ERR_OR_NULL(drvdata->pclk)) + clk_put(drvdata->pclk); + } + + return ret; +} + +static int catu_platform_remove(struct platform_device *pdev) +{ + struct catu_drvdata *drvdata = dev_get_drvdata(&pdev->dev); + + if (WARN_ON(!drvdata)) + return -ENODEV; + + __catu_remove(&pdev->dev); + pm_runtime_disable(&pdev->dev); + if (drvdata && !IS_ERR_OR_NULL(drvdata->pclk)) + clk_put(drvdata->pclk); + return 0; +} + +#ifdef CONFIG_PM +static int catu_runtime_suspend(struct device *dev) +{ + struct catu_drvdata *drvdata = dev_get_drvdata(dev); + + if (drvdata && !IS_ERR_OR_NULL(drvdata->pclk)) + clk_disable_unprepare(drvdata->pclk); + return 0; +} + +static int catu_runtime_resume(struct device *dev) +{ + struct catu_drvdata *drvdata = dev_get_drvdata(dev); + + if (drvdata && !IS_ERR_OR_NULL(drvdata->pclk)) + clk_prepare_enable(drvdata->pclk); + return 0; +} +#endif + +static const struct dev_pm_ops catu_dev_pm_ops = { + SET_RUNTIME_PM_OPS(catu_runtime_suspend, catu_runtime_resume, NULL) +}; + +#ifdef CONFIG_ACPI +static const struct acpi_device_id catu_acpi_ids[] = { + {"ARMHC9CA", 0, 0, 0}, /* ARM CoreSight CATU */ + {}, +}; + +MODULE_DEVICE_TABLE(acpi, catu_acpi_ids); +#endif + +static struct platform_driver catu_platform_driver = { + .probe = catu_platform_probe, + .remove = catu_platform_remove, + .driver = { + .name = "coresight-catu-platform", + .acpi_match_table = ACPI_PTR(catu_acpi_ids), + .suppress_bind_attrs = true, + .pm = &catu_dev_pm_ops, + }, +}; + static int __init catu_init(void) { int ret; - ret = amba_driver_register(&catu_driver); - if (ret) - pr_info("Error registering catu driver\n"); + ret = coresight_init_driver("catu", &catu_driver, &catu_platform_driver); tmc_etr_set_catu_ops(&etr_catu_buf_ops); return ret; } @@ -612,7 +714,7 @@ static int __init catu_init(void) static void __exit catu_exit(void) { tmc_etr_remove_catu_ops(); - amba_driver_unregister(&catu_driver); + coresight_remove_driver(&catu_driver, &catu_platform_driver); } module_init(catu_init); diff --git a/drivers/hwtracing/coresight/coresight-catu.h b/drivers/hwtracing/coresight/coresight-catu.h index 442e034bbfba..141feac1c14b 100644 --- a/drivers/hwtracing/coresight/coresight-catu.h +++ b/drivers/hwtracing/coresight/coresight-catu.h @@ -61,6 +61,7 @@ #define CATU_IRQEN_OFF 0x0 struct catu_drvdata { + struct clk *pclk; void __iomem *base; struct coresight_device *csdev; int irq; -- 2.25.1
WARNING: multiple messages have this Message-ID (diff)
From: Anshuman Khandual <anshuman.khandual@arm.com> To: linux-arm-kernel@lists.infradead.org, suzuki.poulose@arm.com Cc: Anshuman Khandual <anshuman.khandual@arm.com>, Lorenzo Pieralisi <lpieralisi@kernel.org>, Sudeep Holla <sudeep.holla@arm.com>, Mike Leach <mike.leach@linaro.org>, James Clark <james.clark@arm.com>, Maxime Coquelin <mcoquelin.stm32@gmail.com>, Alexandre Torgue <alexandre.torgue@foss.st.com>, linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, coresight@lists.linaro.org, linux-stm32@st-md-mailman.stormreply.com Subject: [PATCH V6 07/11] coresight: catu: Move ACPI support from AMBA driver to platform driver Date: Tue, 12 Mar 2024 15:53:14 +0530 [thread overview] Message-ID: <20240312102318.2285165-8-anshuman.khandual@arm.com> (raw) In-Reply-To: <20240312102318.2285165-1-anshuman.khandual@arm.com> Add support for the catu devices in a new platform driver, which can then be used on ACPI based platforms. This change would now allow runtime power management for ACPI based systems. The driver would try to enable the APB clock if available. But first this renames and then refactors catu_probe() and catu_remove(), making sure it can be used both for platform and AMBA drivers. This also moves pm_runtime_put() from catu_probe() to the callers. Cc: Lorenzo Pieralisi <lpieralisi@kernel.org> Cc: Sudeep Holla <sudeep.holla@arm.com> Cc: Suzuki K Poulose <suzuki.poulose@arm.com> Cc: Mike Leach <mike.leach@linaro.org> Cc: James Clark <james.clark@arm.com> Cc: linux-acpi@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Cc: coresight@lists.linaro.org Acked-by: Sudeep Holla <sudeep.holla@arm.com> # For ACPI related changes Reviewed-by: James Clark <james.clark@arm.com> Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> --- Changes in V6: - Added clk_put() for pclk in catu_platform_probe() error path - Added WARN_ON(!drvdata) check in catu_platform_remove() - Added additional elements for acpi_device_id[] drivers/acpi/arm64/amba.c | 1 - drivers/hwtracing/coresight/coresight-catu.c | 146 ++++++++++++++++--- drivers/hwtracing/coresight/coresight-catu.h | 1 + 3 files changed, 125 insertions(+), 23 deletions(-) diff --git a/drivers/acpi/arm64/amba.c b/drivers/acpi/arm64/amba.c index afb6afb66967..587061b0fd2f 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 */ - {"ARMHC9CA", 0}, /* ARM CoreSight CATU */ {"", 0}, }; diff --git a/drivers/hwtracing/coresight/coresight-catu.c b/drivers/hwtracing/coresight/coresight-catu.c index 3949ded0d4fa..8fa035e5a0e8 100644 --- a/drivers/hwtracing/coresight/coresight-catu.c +++ b/drivers/hwtracing/coresight/coresight-catu.c @@ -7,6 +7,8 @@ * Author: Suzuki K Poulose <suzuki.poulose@arm.com> */ +#include <linux/platform_device.h> +#include <linux/acpi.h> #include <linux/amba/bus.h> #include <linux/device.h> #include <linux/dma-mapping.h> @@ -502,31 +504,25 @@ static const struct coresight_ops catu_ops = { .helper_ops = &catu_helper_ops, }; -static int catu_probe(struct amba_device *adev, const struct amba_id *id) +static int __catu_probe(struct device *dev, struct resource *res) { int ret = 0; u32 dma_mask; - struct catu_drvdata *drvdata; + struct catu_drvdata *drvdata = dev_get_drvdata(dev); struct coresight_desc catu_desc; struct coresight_platform_data *pdata = NULL; - struct device *dev = &adev->dev; void __iomem *base; catu_desc.name = coresight_alloc_device_name(&catu_devs, dev); if (!catu_desc.name) return -ENOMEM; - drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL); - if (!drvdata) { - ret = -ENOMEM; - goto out; - } - - dev_set_drvdata(dev, drvdata); - base = devm_ioremap_resource(dev, &adev->res); - if (IS_ERR(base)) { - ret = PTR_ERR(base); - goto out; + if (res) { + base = devm_ioremap_resource(dev, res); + if (IS_ERR(base)) { + ret = PTR_ERR(base); + goto out; + } } /* Setup dma mask for the device */ @@ -567,19 +563,39 @@ static int catu_probe(struct amba_device *adev, const struct amba_id *id) drvdata->csdev = coresight_register(&catu_desc); if (IS_ERR(drvdata->csdev)) ret = PTR_ERR(drvdata->csdev); - else - pm_runtime_put(&adev->dev); out: return ret; } -static void catu_remove(struct amba_device *adev) +static int catu_probe(struct amba_device *adev, const struct amba_id *id) +{ + struct catu_drvdata *drvdata; + int ret; + + drvdata = devm_kzalloc(&adev->dev, sizeof(*drvdata), GFP_KERNEL); + if (!drvdata) + return -ENOMEM; + + amba_set_drvdata(adev, drvdata); + ret = __catu_probe(&adev->dev, &adev->res); + if (!ret) + pm_runtime_put(&adev->dev); + + return ret; +} + +static void __catu_remove(struct device *dev) { - struct catu_drvdata *drvdata = dev_get_drvdata(&adev->dev); + struct catu_drvdata *drvdata = dev_get_drvdata(dev); coresight_unregister(drvdata->csdev); } +static void catu_remove(struct amba_device *adev) +{ + __catu_remove(&adev->dev); +} + static struct amba_id catu_ids[] = { CS_AMBA_ID(0x000bb9ee), {}, @@ -598,13 +614,99 @@ static struct amba_driver catu_driver = { .id_table = catu_ids, }; +static int catu_platform_probe(struct platform_device *pdev) +{ + struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + struct catu_drvdata *drvdata; + int ret = 0; + + drvdata = devm_kzalloc(&pdev->dev, sizeof(*drvdata), GFP_KERNEL); + if (!drvdata) + return -ENOMEM; + + drvdata->pclk = coresight_get_enable_apb_pclk(&pdev->dev); + if (IS_ERR(drvdata->pclk)) + return -ENODEV; + + pm_runtime_get_noresume(&pdev->dev); + pm_runtime_set_active(&pdev->dev); + pm_runtime_enable(&pdev->dev); + + dev_set_drvdata(&pdev->dev, drvdata); + ret = __catu_probe(&pdev->dev, res); + pm_runtime_put(&pdev->dev); + if (ret) { + pm_runtime_disable(&pdev->dev); + if (drvdata && !IS_ERR_OR_NULL(drvdata->pclk)) + clk_put(drvdata->pclk); + } + + return ret; +} + +static int catu_platform_remove(struct platform_device *pdev) +{ + struct catu_drvdata *drvdata = dev_get_drvdata(&pdev->dev); + + if (WARN_ON(!drvdata)) + return -ENODEV; + + __catu_remove(&pdev->dev); + pm_runtime_disable(&pdev->dev); + if (drvdata && !IS_ERR_OR_NULL(drvdata->pclk)) + clk_put(drvdata->pclk); + return 0; +} + +#ifdef CONFIG_PM +static int catu_runtime_suspend(struct device *dev) +{ + struct catu_drvdata *drvdata = dev_get_drvdata(dev); + + if (drvdata && !IS_ERR_OR_NULL(drvdata->pclk)) + clk_disable_unprepare(drvdata->pclk); + return 0; +} + +static int catu_runtime_resume(struct device *dev) +{ + struct catu_drvdata *drvdata = dev_get_drvdata(dev); + + if (drvdata && !IS_ERR_OR_NULL(drvdata->pclk)) + clk_prepare_enable(drvdata->pclk); + return 0; +} +#endif + +static const struct dev_pm_ops catu_dev_pm_ops = { + SET_RUNTIME_PM_OPS(catu_runtime_suspend, catu_runtime_resume, NULL) +}; + +#ifdef CONFIG_ACPI +static const struct acpi_device_id catu_acpi_ids[] = { + {"ARMHC9CA", 0, 0, 0}, /* ARM CoreSight CATU */ + {}, +}; + +MODULE_DEVICE_TABLE(acpi, catu_acpi_ids); +#endif + +static struct platform_driver catu_platform_driver = { + .probe = catu_platform_probe, + .remove = catu_platform_remove, + .driver = { + .name = "coresight-catu-platform", + .acpi_match_table = ACPI_PTR(catu_acpi_ids), + .suppress_bind_attrs = true, + .pm = &catu_dev_pm_ops, + }, +}; + static int __init catu_init(void) { int ret; - ret = amba_driver_register(&catu_driver); - if (ret) - pr_info("Error registering catu driver\n"); + ret = coresight_init_driver("catu", &catu_driver, &catu_platform_driver); tmc_etr_set_catu_ops(&etr_catu_buf_ops); return ret; } @@ -612,7 +714,7 @@ static int __init catu_init(void) static void __exit catu_exit(void) { tmc_etr_remove_catu_ops(); - amba_driver_unregister(&catu_driver); + coresight_remove_driver(&catu_driver, &catu_platform_driver); } module_init(catu_init); diff --git a/drivers/hwtracing/coresight/coresight-catu.h b/drivers/hwtracing/coresight/coresight-catu.h index 442e034bbfba..141feac1c14b 100644 --- a/drivers/hwtracing/coresight/coresight-catu.h +++ b/drivers/hwtracing/coresight/coresight-catu.h @@ -61,6 +61,7 @@ #define CATU_IRQEN_OFF 0x0 struct catu_drvdata { + struct clk *pclk; void __iomem *base; struct coresight_device *csdev; int irq; -- 2.25.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2024-03-12 10:24 UTC|newest] Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top 2024-03-12 10:23 [PATCH V6 00/11] coresight: Move remaining AMBA ACPI devices into platform driver Anshuman Khandual 2024-03-12 10:23 ` Anshuman Khandual 2024-03-12 10:23 ` [PATCH V6 01/11] coresight: etm4x: Fix unbalanced pm_runtime_enable() Anshuman Khandual 2024-03-12 10:23 ` Anshuman Khandual 2024-03-12 10:23 ` [PATCH V6 02/11] coresight: stm: Extract device name from AMBA pid based table lookup Anshuman Khandual 2024-03-12 10:23 ` Anshuman Khandual 2024-03-12 10:23 ` [PATCH V6 03/11] coresight: tmc: Extract device properties " Anshuman Khandual 2024-03-12 10:23 ` Anshuman Khandual 2024-03-12 10:23 ` [PATCH V6 04/11] coresight: Add helpers registering/removing both AMBA and platform drivers Anshuman Khandual 2024-03-12 10:23 ` Anshuman Khandual 2024-03-12 10:23 ` [PATCH V6 05/11] coresight: replicator: Move ACPI support from AMBA driver to platform driver Anshuman Khandual 2024-03-12 10:23 ` Anshuman Khandual 2024-03-12 14:39 ` Suzuki K Poulose 2024-03-12 14:39 ` Suzuki K Poulose 2024-03-13 2:31 ` Anshuman Khandual 2024-03-13 2:31 ` Anshuman Khandual 2024-03-13 9:41 ` Suzuki K Poulose 2024-03-13 9:41 ` Suzuki K Poulose 2024-03-12 10:23 ` [PATCH V6 06/11] coresight: funnel: " Anshuman Khandual 2024-03-12 10:23 ` Anshuman Khandual 2024-03-12 14:41 ` Suzuki K Poulose 2024-03-12 14:41 ` Suzuki K Poulose 2024-03-13 4:33 ` Anshuman Khandual 2024-03-13 4:33 ` Anshuman Khandual 2024-03-13 11:08 ` Suzuki K Poulose 2024-03-13 11:08 ` Suzuki K Poulose 2024-03-12 10:23 ` Anshuman Khandual [this message] 2024-03-12 10:23 ` [PATCH V6 07/11] coresight: catu: " Anshuman Khandual 2024-03-12 15:05 ` Suzuki K Poulose 2024-03-12 15:05 ` Suzuki K Poulose 2024-03-13 4:35 ` Anshuman Khandual 2024-03-13 4:35 ` Anshuman Khandual 2024-03-12 10:23 ` [PATCH V6 08/11] coresight: tpiu: " Anshuman Khandual 2024-03-12 10:23 ` Anshuman Khandual 2024-03-12 16:37 ` Suzuki K Poulose 2024-03-12 16:37 ` Suzuki K Poulose 2024-03-13 4:42 ` Anshuman Khandual 2024-03-13 4:42 ` Anshuman Khandual 2024-03-12 10:23 ` [PATCH V6 09/11] coresight: tmc: " Anshuman Khandual 2024-03-12 10:23 ` Anshuman Khandual 2024-03-12 10:23 ` [PATCH V6 10/11] coresight: stm: " Anshuman Khandual 2024-03-12 10:23 ` Anshuman Khandual 2024-03-12 10:23 ` [PATCH V6 11/11] coresight: debug: " Anshuman Khandual 2024-03-12 10:23 ` Anshuman Khandual
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