On Tue, 11 Jun 2019 at 10:36, Suzuki K Poulose suzuki.poulose@arm.com wrote:
Mike,
On 05/06/2019 20:02, Mike Leach wrote:
Adds sysfs access to the coresight management registers.
Signed-off-by: Mike Leach mike.leach@linaro.org
Thanks for splitting the patches and this looks much nicer to review.
.../hwtracing/coresight/coresight-cti-sysfs.c | 49 +++++++++++++++++++ drivers/hwtracing/coresight/coresight-priv.h | 1 + 2 files changed, 50 insertions(+)
diff --git a/drivers/hwtracing/coresight/coresight-cti-sysfs.c b/drivers/hwtracing/coresight/coresight-cti-sysfs.c index deb882a6a367..ad7c45390313 100644 --- a/drivers/hwtracing/coresight/coresight-cti-sysfs.c +++ b/drivers/hwtracing/coresight/coresight-cti-sysfs.c @@ -66,9 +66,52 @@ static ssize_t enable_store(struct device *dev, } static DEVICE_ATTR_RW(enable);
+static ssize_t ctmid_show(struct device *dev,
struct device_attribute *attr,char *buf)+{
struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent);return scnprintf(buf, PAGE_SIZE, "%d\n", drvdata->ctidev.ctm_id);+} +static DEVICE_ATTR_RO(ctmid);
- /* attribute and group sysfs tables. */ static struct attribute *coresight_cti_attrs[] = { &dev_attr_enable.attr,
&dev_attr_ctmid.attr,NULL,+};
+/* register based attributes */ +#define coresight_cti_reg(name, offset) \
coresight_simple_reg32(struct cti_drvdata, name, offset)+/* coresight management registers */ +coresight_cti_reg(devaff0, CTIDEVAFF0); +coresight_cti_reg(devaff1, CTIDEVAFF1); +coresight_cti_reg(authstatus, CORESIGHT_AUTHSTATUS); +coresight_cti_reg(devarch, CORESIGHT_DEVARCH); +coresight_cti_reg(devid, CORESIGHT_DEVID); +coresight_cti_reg(devtype, CORESIGHT_DEVTYPE); +coresight_cti_reg(pidr0, CORESIGHT_PERIPHIDR0); +coresight_cti_reg(pidr1, CORESIGHT_PERIPHIDR1); +coresight_cti_reg(pidr2, CORESIGHT_PERIPHIDR2); +coresight_cti_reg(pidr3, CORESIGHT_PERIPHIDR3); +coresight_cti_reg(pidr4, CORESIGHT_PERIPHIDR4);
Same question as Mathieu, do we need pidrX ? If at all we do,
Same answer - consistency with TRM
Thanks
Mike
I would prefer to expose the consolidated PID.
Otherwise looks good to me:
Suzuki