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coresight: stm: Rearrange probing the stimulus area

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As we are about to refactor the platform specific handling
re-arrange some of the DT specific property handling.

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 11:29:21 -06:00 committed by Greg Kroah-Hartman
parent 6e9ad80506
commit 18e46e1109
1 changed files with 19 additions and 4 deletions
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23
drivers/hwtracing/coresight/coresight-stm.c
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@ -683,14 +683,15 @@ static const struct attribute_group *coresight_stm_groups[] = {
NULL,
};
static int stm_get_resource_byname(struct device_node *np,
char *ch_base, struct resource *res)
#ifdef CONFIG_OF
static int of_stm_get_stimulus_area(struct device *dev, struct resource *res)
{
const char *name = NULL;
int index = 0, found = 0;
struct device_node *np = dev->of_node;
while (!of_property_read_string_index(np, "reg-names", index, &name)) {
if (strcmp(ch_base, name)) {
if (strcmp("stm-stimulus-base", name)) {
index++;
continue;
}
@ -705,6 +706,20 @@ static int stm_get_resource_byname(struct device_node *np,
return of_address_to_resource(np, index, res);
}
#else
static inline int of_stm_get_stimulus_area(struct device *dev,
struct resource *res)
{
return -ENOENT;
}
#endif
static int stm_get_stimulus_area(struct device *dev, struct resource *res)
{
if (is_of_node(dev_fwnode(dev)))
return of_stm_get_stimulus_area(dev, res);
return -ENOENT;
}
static u32 stm_fundamental_data_size(struct stm_drvdata *drvdata)
{
@ -819,7 +834,7 @@ static int stm_probe(struct amba_device *adev, const struct amba_id *id)
return PTR_ERR(base);
drvdata->base = base;
ret = stm_get_resource_byname(np, "stm-stimulus-base", &ch_res);
ret = stm_get_stimulus_area(dev, &ch_res);
if (ret)
return ret;
drvdata->chs.phys = ch_res.start;