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coresight: tmc-etr: Rearrange probing default buffer size 

As we are about to refactor the platform specific handling,
make the default buffer size probing generic.

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 2019-06-19 11:29:22 -06:00 committed by Greg Kroah-Hartman
parent 18e46e1109
commit 538eca25ff
1 changed files with 12 additions and 9 deletions
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21
drivers/hwtracing/coresight/coresight-tmc.c
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@ -378,6 +378,15 @@ static int tmc_etr_setup_caps(struct device *parent, u32 devid, void *dev_caps)
return rc;
}
static u32 tmc_etr_get_default_buffer_size(struct device *dev)
{
u32 size;
if (fwnode_property_read_u32(dev->fwnode, "arm,buffer-size", &size))
size = SZ_1M;
return size;
}
static int tmc_probe(struct amba_device *adev, const struct amba_id *id)
{
int ret = 0;
@ -423,16 +432,10 @@ static int tmc_probe(struct amba_device *adev, const struct amba_id *id)
/* This device is not associated with a session */
drvdata->pid = -1;
if (drvdata->config_type == TMC_CONFIG_TYPE_ETR) {
if (np)
ret = of_property_read_u32(np,
"arm,buffer-size",
&drvdata->size);
if (ret)
drvdata->size = SZ_1M;
} else {
if (drvdata->config_type == TMC_CONFIG_TYPE_ETR)
drvdata->size = tmc_etr_get_default_buffer_size(dev);
else
drvdata->size = readl_relaxed(drvdata->base + TMC_RSZ) * 4;
}
desc.pdata = pdata;
desc.dev = dev;