Adds sysfs access to the coresight management registers.
Signed-off-by: Mike Leach mike.leach@linaro.org --- .../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); + +static struct attribute *coresight_cti_mgmt_attrs[] = { + &dev_attr_devaff0.attr, + &dev_attr_devaff1.attr, + &dev_attr_authstatus.attr, + &dev_attr_devarch.attr, + &dev_attr_devid.attr, + &dev_attr_devtype.attr, + &dev_attr_pidr0.attr, + &dev_attr_pidr1.attr, + &dev_attr_pidr2.attr, + &dev_attr_pidr3.attr, + &dev_attr_pidr4.attr, NULL, };
@@ -76,7 +119,13 @@ static const struct attribute_group coresight_cti_group = { .attrs = coresight_cti_attrs, };
+static const struct attribute_group coresight_cti_mgmt_group = { + .attrs = coresight_cti_mgmt_attrs, + .name = "mgmt", +}; + const struct attribute_group *coresight_cti_groups[] = { &coresight_cti_group, + &coresight_cti_mgmt_group, NULL, }; diff --git a/drivers/hwtracing/coresight/coresight-priv.h b/drivers/hwtracing/coresight/coresight-priv.h index dd2991dfbf4c..64a888cc620f 100644 --- a/drivers/hwtracing/coresight/coresight-priv.h +++ b/drivers/hwtracing/coresight/coresight-priv.h @@ -22,6 +22,7 @@ #define CORESIGHT_CLAIMCLR 0xfa4 #define CORESIGHT_LAR 0xfb0 #define CORESIGHT_LSR 0xfb4 +#define CORESIGHT_DEVARCH 0xfbc #define CORESIGHT_AUTHSTATUS 0xfb8 #define CORESIGHT_DEVID 0xfc8 #define CORESIGHT_DEVTYPE 0xfcc