@@ -22,10 +22,8 @@
static const struct acpi_device_id amba_id_list[] = {
{"ARMH0061", 0}, /* PL061 GPIO Device */
{"ARMH0330", 0}, /* ARM DMA Controller DMA-330 */
- {"ARMHC501", 0}, /* ARM CoreSight ETR */
{"ARMHC502", 0}, /* ARM CoreSight STM */
{"ARMHC503", 0}, /* ARM CoreSight Debug */
- {"ARMHC97C", 0}, /* ARM CoreSight SoC-400 TMC, SoC-600 ETF/ETB */
{"", 0},
};
@@ -24,6 +24,8 @@
#include <linux/of.h>
#include <linux/coresight.h>
#include <linux/amba/bus.h>
+#include <linux/platform_device.h>
+#include <linux/acpi.h>
#include "coresight-priv.h"
#include "coresight-tmc.h"
@@ -444,24 +446,17 @@ static u32 tmc_etr_get_max_burst_size(struct device *dev)
return burst_size;
}
-static int tmc_probe(struct amba_device *adev, const struct amba_id *id)
+static int __tmc_probe(struct device *dev, struct resource *res)
{
int ret = 0;
u32 devid;
void __iomem *base;
- struct device *dev = &adev->dev;
struct coresight_platform_data *pdata = NULL;
- struct tmc_drvdata *drvdata;
- struct resource *res = &adev->res;
+ struct tmc_drvdata *drvdata = dev_get_drvdata(dev);
struct coresight_desc desc = { 0 };
struct coresight_dev_list *dev_list = NULL;
ret = -ENOMEM;
- drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
- if (!drvdata)
- goto out;
-
- dev_set_drvdata(dev, drvdata);
/* Validity for the resource is already checked by the AMBA core */
base = devm_ioremap_resource(dev, res);
@@ -536,7 +531,7 @@ static int tmc_probe(struct amba_device *adev, const struct amba_id *id)
ret = PTR_ERR(pdata);
goto out;
}
- adev->dev.platform_data = pdata;
+ dev->platform_data = pdata;
desc.pdata = pdata;
drvdata->csdev = coresight_register(&desc);
@@ -551,12 +546,27 @@ static int tmc_probe(struct amba_device *adev, const struct amba_id *id)
ret = misc_register(&drvdata->miscdev);
if (ret)
coresight_unregister(drvdata->csdev);
- else
- pm_runtime_put(&adev->dev);
out:
return ret;
}
+static int tmc_probe(struct amba_device *adev, const struct amba_id *id)
+{
+ struct tmc_drvdata *drvdata;
+ int ret;
+
+ drvdata = devm_kzalloc(&adev->dev, sizeof(*drvdata), GFP_KERNEL);
+ if (!drvdata)
+ return -ENOMEM;
+
+ amba_set_drvdata(adev, drvdata);
+ ret = __tmc_probe(&adev->dev, &adev->res);
+ if (!ret)
+ pm_runtime_put(&adev->dev);
+
+ return ret;
+}
+
static void tmc_shutdown(struct amba_device *adev)
{
unsigned long flags;
@@ -579,9 +589,9 @@ static void tmc_shutdown(struct amba_device *adev)
spin_unlock_irqrestore(&drvdata->spinlock, flags);
}
-static void tmc_remove(struct amba_device *adev)
+static void __tmc_remove(struct device *dev)
{
- struct tmc_drvdata *drvdata = dev_get_drvdata(&adev->dev);
+ struct tmc_drvdata *drvdata = dev_get_drvdata(dev);
/*
* Since misc_open() holds a refcount on the f_ops, which is
@@ -592,6 +602,11 @@ static void tmc_remove(struct amba_device *adev)
coresight_unregister(drvdata->csdev);
}
+static void tmc_remove(struct amba_device *adev)
+{
+ __tmc_remove(&adev->dev);
+}
+
static const struct amba_id tmc_ids[] = {
CS_AMBA_ID(0x000bb961),
/* Coresight SoC 600 TMC-ETR/ETS */
@@ -617,7 +632,101 @@ static struct amba_driver tmc_driver = {
.id_table = tmc_ids,
};
-module_amba_driver(tmc_driver);
+static int tmc_platform_probe(struct platform_device *pdev)
+{
+ struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ struct tmc_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;
+
+ dev_set_drvdata(&pdev->dev, drvdata);
+ pm_runtime_get_noresume(&pdev->dev);
+ pm_runtime_set_active(&pdev->dev);
+ pm_runtime_enable(&pdev->dev);
+
+ ret = __tmc_probe(&pdev->dev, res);
+ pm_runtime_put(&pdev->dev);
+ if (ret)
+ pm_runtime_disable(&pdev->dev);
+
+ return ret;
+}
+
+static int tmc_platform_remove(struct platform_device *pdev)
+{
+ struct tmc_drvdata *drvdata = dev_get_drvdata(&pdev->dev);
+
+ if (drvdata)
+ __tmc_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 tmc_runtime_suspend(struct device *dev)
+{
+ struct tmc_drvdata *drvdata = dev_get_drvdata(dev);
+
+ if (drvdata && !IS_ERR_OR_NULL(drvdata->pclk))
+ clk_disable_unprepare(drvdata->pclk);
+ return 0;
+}
+
+static int tmc_runtime_resume(struct device *dev)
+{
+ struct tmc_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 tmc_dev_pm_ops = {
+ SET_RUNTIME_PM_OPS(tmc_runtime_suspend, tmc_runtime_resume, NULL)
+};
+
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id tmc_acpi_ids[] = {
+ {"ARMHC501", 0}, /* ARM CoreSight ETR */
+ {"ARMHC97C", 0}, /* ARM CoreSight SoC-400 TMC, SoC-600 ETF/ETB */
+ {},
+};
+MODULE_DEVICE_TABLE(acpi, tmc_acpi_ids);
+#endif
+
+static struct platform_driver tmc_platform_driver = {
+ .probe = tmc_platform_probe,
+ .remove = tmc_platform_remove,
+ .driver = {
+ .name = "coresight-tmc-platform",
+ .acpi_match_table = ACPI_PTR(tmc_acpi_ids),
+ .suppress_bind_attrs = true,
+ .pm = &tmc_dev_pm_ops,
+ },
+};
+
+static int __init tmc_init(void)
+{
+ return coresight_init_driver("tmc", &tmc_driver, &tmc_platform_driver);
+}
+
+static void __exit tmc_exit(void)
+{
+ coresight_remove_driver(&tmc_driver, &tmc_platform_driver);
+}
+module_init(tmc_init);
+module_exit(tmc_exit);
MODULE_AUTHOR("Pratik Patel <pratikp@codeaurora.org>");
MODULE_DESCRIPTION("Arm CoreSight Trace Memory Controller driver");
@@ -166,6 +166,7 @@ struct etr_buf {
/**
* struct tmc_drvdata - specifics associated to an TMC component
+ * @pclk: APB clock if present, otherwise NULL
* @base: memory mapped base address for this component.
* @csdev: component vitals needed by the framework.
* @miscdev: specifics to handle "/dev/xyz.tmc" entry.
@@ -190,6 +191,7 @@ struct etr_buf {
* @perf_buf: PERF buffer for ETR.
*/
struct tmc_drvdata {
+ struct clk *pclk;
void __iomem *base;
struct coresight_device *csdev;
struct miscdevice miscdev;