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[68.147.8.254]) by smtp.gmail.com with ESMTPSA id x17sm6064216pfn.16.2020.03.20.09.53.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 20 Mar 2020 09:53:06 -0700 (PDT) From: Mathieu Poirier To: gregkh@linuxfoundation.org Cc: mike.leach@linaro.org, suzuki.poulose@arm.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v11 02/12] coresight: cti: Add sysfs coresight mgmt register access Date: Fri, 20 Mar 2020 10:52:53 -0600 Message-Id: <20200320165303.13681-3-mathieu.poirier@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200320165303.13681-1-mathieu.poirier@linaro.org> References: <20200320165303.13681-1-mathieu.poirier@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Mike Leach Adds sysfs access to the coresight management registers. Signed-off-by: Mike Leach Reviewed-by: Suzuki K Poulose Signed-off-by: Mathieu Poirier --- .../hwtracing/coresight/coresight-cti-sysfs.c | 53 +++++++++++++++++++ drivers/hwtracing/coresight/coresight-priv.h | 1 + 2 files changed, 54 insertions(+) diff --git a/drivers/hwtracing/coresight/coresight-cti-sysfs.c b/drivers/hwtracing/coresight/coresight-cti-sysfs.c index 6d2790568071..378b435d9a8f 100644 --- a/drivers/hwtracing/coresight/coresight-cti-sysfs.c +++ b/drivers/hwtracing/coresight/coresight-cti-sysfs.c @@ -73,11 +73,64 @@ static struct attribute *coresight_cti_attrs[] = { NULL, }; +/* register based attributes */ + +/* macro to access RO registers with power check only (no enable check). */ +#define coresight_cti_reg(name, offset) \ +static ssize_t name##_show(struct device *dev, \ + struct device_attribute *attr, char *buf) \ +{ \ + struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent); \ + u32 val = 0; \ + pm_runtime_get_sync(dev->parent); \ + spin_lock(&drvdata->spinlock); \ + if (drvdata->config.hw_powered) \ + val = readl_relaxed(drvdata->base + offset); \ + spin_unlock(&drvdata->spinlock); \ + pm_runtime_put_sync(dev->parent); \ + return sprintf(buf, "0x%x\n", val); \ +} \ +static DEVICE_ATTR_RO(name) + +/* 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, +}; + 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 82e563cdc879..aba6b789c969 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 -- 2.20.1