diff options
Diffstat (limited to 'drivers/hwtracing')
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-tmc.c | 31 |
1 files changed, 8 insertions, 23 deletions
diff --git a/drivers/hwtracing/coresight/coresight-tmc.c b/drivers/hwtracing/coresight/coresight-tmc.c index 7147f3dd363c..a57c7ec1661f 100644 --- a/drivers/hwtracing/coresight/coresight-tmc.c +++ b/drivers/hwtracing/coresight/coresight-tmc.c @@ -23,7 +23,7 @@ #include <linux/slab.h> #include <linux/dma-mapping.h> #include <linux/spinlock.h> -#include <linux/clk.h> +#include <linux/pm_runtime.h> #include <linux/of.h> #include <linux/coresight.h> #include <linux/amba/bus.h> @@ -104,7 +104,6 @@ enum tmc_mem_intf_width { * @dev: the device entity associated to this component. * @csdev: component vitals needed by the framework. * @miscdev: specifics to handle "/dev/xyz.tmc" entry. - * @clk: the clock this component is associated to. * @spinlock: only one at a time pls. * @read_count: manages preparation of buffer for reading. * @buf: area of memory where trace data get sent. @@ -120,7 +119,6 @@ struct tmc_drvdata { struct device *dev; struct coresight_device *csdev; struct miscdevice miscdev; - struct clk *clk; spinlock_t spinlock; int read_count; bool reading; @@ -242,17 +240,14 @@ static void tmc_etf_enable_hw(struct tmc_drvdata *drvdata) static int tmc_enable(struct tmc_drvdata *drvdata, enum tmc_mode mode) { - int ret; unsigned long flags; - ret = clk_prepare_enable(drvdata->clk); - if (ret) - return ret; + pm_runtime_get_sync(drvdata->dev); spin_lock_irqsave(&drvdata->spinlock, flags); if (drvdata->reading) { spin_unlock_irqrestore(&drvdata->spinlock, flags); - clk_disable_unprepare(drvdata->clk); + pm_runtime_put(drvdata->dev); return -EBUSY; } @@ -386,7 +381,7 @@ out: drvdata->enable = false; spin_unlock_irqrestore(&drvdata->spinlock, flags); - clk_disable_unprepare(drvdata->clk); + pm_runtime_put(drvdata->dev); dev_info(drvdata->dev, "TMC disabled\n"); } @@ -568,17 +563,13 @@ static const struct file_operations tmc_fops = { static ssize_t status_show(struct device *dev, struct device_attribute *attr, char *buf) { - int ret; unsigned long flags; u32 tmc_rsz, tmc_sts, tmc_rrp, tmc_rwp, tmc_trg; u32 tmc_ctl, tmc_ffsr, tmc_ffcr, tmc_mode, tmc_pscr; u32 devid; struct tmc_drvdata *drvdata = dev_get_drvdata(dev->parent); - ret = clk_prepare_enable(drvdata->clk); - if (ret) - goto out; - + pm_runtime_get_sync(drvdata->dev); spin_lock_irqsave(&drvdata->spinlock, flags); CS_UNLOCK(drvdata->base); @@ -596,8 +587,7 @@ static ssize_t status_show(struct device *dev, CS_LOCK(drvdata->base); spin_unlock_irqrestore(&drvdata->spinlock, flags); - - clk_disable_unprepare(drvdata->clk); + pm_runtime_put(drvdata->dev); return sprintf(buf, "Depth:\t\t0x%x\n" @@ -613,7 +603,7 @@ static ssize_t status_show(struct device *dev, "DEVID:\t\t0x%x\n", tmc_rsz, tmc_sts, tmc_rrp, tmc_rwp, tmc_trg, tmc_ctl, tmc_ffsr, tmc_ffcr, tmc_mode, tmc_pscr, devid); -out: + return -EINVAL; } static DEVICE_ATTR_RO(status); @@ -700,11 +690,6 @@ static int tmc_probe(struct amba_device *adev, const struct amba_id *id) spin_lock_init(&drvdata->spinlock); - drvdata->clk = adev->pclk; - ret = clk_prepare_enable(drvdata->clk); - if (ret) - return ret; - devid = readl_relaxed(drvdata->base + CORESIGHT_DEVID); drvdata->config_type = BMVAL(devid, 6, 7); @@ -719,7 +704,7 @@ static int tmc_probe(struct amba_device *adev, const struct amba_id *id) drvdata->size = readl_relaxed(drvdata->base + TMC_RSZ) * 4; } - clk_disable_unprepare(drvdata->clk); + pm_runtime_put(&adev->dev); if (drvdata->config_type == TMC_CONFIG_TYPE_ETR) { drvdata->vaddr = dma_alloc_coherent(dev, drvdata->size, |