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Merge "coresight: cti: Add sys interface to show max trigger number"

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qctecmdr 2020-07-23 19:13:20 -07:00 • committed by Gerrit - the friendly Code Review server
commit ca81e969e7
1 changed files with 21 additions and 0 deletions
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21
drivers/hwtracing/coresight/coresight-cti.c
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@ -56,6 +56,7 @@ do { \
#define ITTRIGOUTACK (0xEF0)
#define ITCHIN (0xEF4)
#define ITTRIGIN (0xEF8)
#define DEVID (0xFC8)
#define CTI_MAX_TRIGGERS (32)
#define CTI_MAX_CHANNELS (4)
@ -86,6 +87,8 @@ struct cti_drvdata {
struct coresight_cti cti;
int refcnt;
int cpu;
unsigned int trig_num_max;
unsigned int ch_num_max;
bool cti_save;
bool cti_hwclk;
bool l2_off;
@ -1354,6 +1357,19 @@ static ssize_t disable_gate_store(struct device *dev,
}
static DEVICE_ATTR_WO(disable_gate);
static ssize_t show_info_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent);
ssize_t size = 0;
size = scnprintf(&buf[size], PAGE_SIZE, "%d %d\n",
drvdata->trig_num_max, drvdata->ch_num_max);
return size;
}
static DEVICE_ATTR_RO(show_info);
static struct attribute *cti_attrs[] = {
&dev_attr_show_trigin.attr,
&dev_attr_show_trigout.attr,
@ -1370,6 +1386,7 @@ static struct attribute *cti_attrs[] = {
&dev_attr_show_gate.attr,
&dev_attr_enable_gate.attr,
&dev_attr_disable_gate.attr,
&dev_attr_show_info.attr,
NULL,
};
@ -1511,6 +1528,7 @@ EXPORT_SYMBOL(of_get_coresight_cti_data);
static int cti_probe(struct amba_device *adev, const struct amba_id *id)
{
int ret;
unsigned int ctidevid;
struct device *dev = &adev->dev;
struct coresight_platform_data *pdata;
struct cti_drvdata *drvdata;
@ -1574,6 +1592,9 @@ static int cti_probe(struct amba_device *adev, const struct amba_id *id)
cpu_pm_register_notifier(&cti_cpu_pm_notifier);
registered++;
}
ctidevid = cti_readl(drvdata, DEVID);
drvdata->trig_num_max = (ctidevid & GENMASK(15, 8)) >> 8;
drvdata->ch_num_max = (ctidevid & GENMASK(21, 16)) >> 16;
pm_runtime_put(&adev->dev);
dev_dbg(dev, "CTI initialized\n");
return 0;