Messages in this thread Patch in this message | | | From | Suzuki K Poulose <> | Subject | [PATCH v2 12/14] coresight: catu: Claim device before use | Date | Thu, 6 Sep 2018 10:08:33 +0100 |
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Use the CLAIM protocol to grab the ownership of the component when in use.
Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> --- drivers/hwtracing/coresight/coresight-catu.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/drivers/hwtracing/coresight/coresight-catu.c b/drivers/hwtracing/coresight/coresight-catu.c index ff94e58..170fbb6 100644 --- a/drivers/hwtracing/coresight/coresight-catu.c +++ b/drivers/hwtracing/coresight/coresight-catu.c @@ -406,6 +406,7 @@ static inline int catu_wait_for_ready(struct catu_drvdata *drvdata) static int catu_enable_hw(struct catu_drvdata *drvdata, void *data) { + int rc; u32 control, mode; struct etr_buf *etr_buf = data; @@ -418,6 +419,10 @@ static int catu_enable_hw(struct catu_drvdata *drvdata, void *data) return -EBUSY; } + rc = coresight_claim_device_unlocked(drvdata->base); + if (rc) + return rc; + control |= BIT(CATU_CONTROL_ENABLE); if (etr_buf && etr_buf->mode == ETR_MODE_CATU) { @@ -459,6 +464,7 @@ static int catu_disable_hw(struct catu_drvdata *drvdata) int rc = 0; catu_write_control(drvdata, 0); + coresight_disclaim_device_unlocked(drvdata->base); if (catu_wait_for_ready(drvdata)) { dev_info(drvdata->dev, "Timeout while waiting for READY\n"); rc = -EAGAIN; -- 2.7.4
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