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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>
This commit is contained in:
Suzuki K Poulose 2017-08-02 10:22:10 -06:00 committed by Greg Kroah-Hartman
parent 79d29bb93b
commit 99ac6f1209
1 changed files with 11 additions and 3 deletions
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14
drivers/hwtracing/coresight/coresight-tmc.c
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@ -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);