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| author | Suzuki K Poulose <suzuki.poulose@arm.com> | 2017-08-02 10:22:10 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-08-28 16:05:49 +0200 |
| commit | 99ac6f120986430993285e3e3f8ecf590d04ba2c (patch) | |
| tree | fbd65a95db48f1cacbdb546627bcc1cfb5e8e40d /drivers/hwtracing | |
| parent | 79d29bb93bd846f71f617bc06a80444ba6ba08b5 (diff) | |
| download | linux-99ac6f120986430993285e3e3f8ecf590d04ba2c.tar.gz | |
coresight tmc: Handle configuration types properly
Coresight SoC 600 defines a new configuration for TMC, Embedded Trace Streamer (ETS), indicated by 0x3 in MODE:CONFIG_TYPE. This would break the existing driver which will treat anything other than ETR/ETB as an ETF. Fix the driver to check the configuration type properly and also add a warning if we encounter an unsupported configuration (ETS). Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hwtracing')
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-tmc.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/drivers/hwtracing/coresight/coresight-tmc.c b/drivers/hwtracing/coresight/coresight-tmc.c index bd98b5101528..6adf74689a85 100644 --- a/drivers/hwtracing/coresight/coresight-tmc.c +++ b/drivers/hwtracing/coresight/coresight-tmc.c @@ -360,11 +360,13 @@ static int tmc_probe(struct amba_device *adev, const struct amba_id *id) desc.dev = dev; desc.groups = coresight_tmc_groups; - if (drvdata->config_type == TMC_CONFIG_TYPE_ETB) { + switch (drvdata->config_type) { + case TMC_CONFIG_TYPE_ETB: desc.type = CORESIGHT_DEV_TYPE_SINK; desc.subtype.sink_subtype = CORESIGHT_DEV_SUBTYPE_SINK_BUFFER; desc.ops = &tmc_etb_cs_ops; - } else if (drvdata->config_type == TMC_CONFIG_TYPE_ETR) { + break; + case TMC_CONFIG_TYPE_ETR: desc.type = CORESIGHT_DEV_TYPE_SINK; desc.subtype.sink_subtype = CORESIGHT_DEV_SUBTYPE_SINK_BUFFER; desc.ops = &tmc_etr_cs_ops; @@ -375,10 +377,16 @@ static int tmc_probe(struct amba_device *adev, const struct amba_id *id) ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(40)); if (ret) goto out; - } else { + break; + case TMC_CONFIG_TYPE_ETF: desc.type = CORESIGHT_DEV_TYPE_LINKSINK; desc.subtype.link_subtype = CORESIGHT_DEV_SUBTYPE_LINK_FIFO; desc.ops = &tmc_etf_cs_ops; + break; + default: + pr_err("%s: Unsupported TMC config\n", pdata->name); + ret = -EINVAL; + goto out; } drvdata->csdev = coresight_register(&desc); |