From: Mathieu Poirier <mathieu.poirier@linaro.org>
To: Greg KH <gregkh@linuxfoundation.org>
Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 02/13] coresight: cti: Add sysfs coresight mgmt register access
Date: Wed, 18 Mar 2020 12:16:04 -0600 [thread overview]
Message-ID: <20200318181604.GB18359@xps15> (raw)
In-Reply-To: <20200318131821.GA2789508@kroah.com>
On Wed, Mar 18, 2020 at 02:18:21PM +0100, Greg KH wrote:
> On Mon, Mar 09, 2020 at 10:17:37AM -0600, Mathieu Poirier wrote:
> > From: Mike Leach <mike.leach@linaro.org>
> >
> > Adds sysfs access to the coresight management registers.
> >
> > Signed-off-by: Mike Leach <mike.leach@linaro.org>
> > Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
> > Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
> > [Fixed abbreviation in title]
> > Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
> > ---
> > .../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 a832b8c6b866..507f8eb487fe 100644
> > --- a/drivers/hwtracing/coresight/coresight-cti-sysfs.c
> > +++ b/drivers/hwtracing/coresight/coresight-cti-sysfs.c
> > @@ -62,11 +62,64 @@ 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 scnprintf(buf, PAGE_SIZE, "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
> >
>
> I do not see any Documentation/ABI/ entries for these new sysfs files,
> did I miss it somehow? I can't take new sysfs code without
> documentation.
All the ABI is documented in this patch, which is part of this set.
[1]. https://lkml.org/lkml/2020/3/9/642
Thanks,
Mathieu
>
> thanks,
>
> greg k-h
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next prev parent reply other threads:[~2020-03-18 18:16 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-09 16:17 [PATCH 00/13] coresight: next v5.6-rc5 Mathieu Poirier
2020-03-09 16:17 ` [PATCH 01/13] coresight: cti: Initial CoreSight CTI Driver Mathieu Poirier
2020-03-18 13:22 ` Greg KH
2020-03-18 18:12 ` Mathieu Poirier
2020-03-18 18:15 ` Mathieu Poirier
2020-03-18 18:23 ` Greg KH
2020-03-09 16:17 ` [PATCH 02/13] coresight: cti: Add sysfs coresight mgmt register access Mathieu Poirier
2020-03-18 13:18 ` Greg KH
2020-03-18 18:16 ` Mathieu Poirier [this message]
2020-03-18 18:22 ` Greg KH
2020-03-18 19:28 ` Mathieu Poirier
2020-03-19 7:54 ` Greg KH
2020-03-19 14:40 ` Mathieu Poirier
2020-03-09 16:17 ` [PATCH 03/13] coresight: cti: Add sysfs access to program function registers Mathieu Poirier
2020-03-18 13:23 ` Greg KH
2020-03-09 16:17 ` [PATCH 04/13] coresight: cti: Add sysfs trigger / channel programming API Mathieu Poirier
2020-03-09 16:17 ` [PATCH 05/13] dt-bindings: arm: Adds CoreSight CTI hardware definitions Mathieu Poirier
2020-03-09 16:17 ` [PATCH 06/13] coresight: cti: Add device tree support for v8 arch CTI Mathieu Poirier
2020-03-09 16:17 ` [PATCH 07/13] coresight: cti: Add device tree support for custom CTI Mathieu Poirier
2020-03-09 16:17 ` [PATCH 08/13] coresight: cti: Enable CTI associated with devices Mathieu Poirier
2020-03-09 16:17 ` [PATCH 09/13] coresight: cti: Add connection information to sysfs Mathieu Poirier
2020-03-09 16:17 ` [PATCH 10/13] docs: coresight: Update documentation for CoreSight to cover CTI Mathieu Poirier
2020-03-09 16:17 ` [PATCH 11/13] docs: sysfs: coresight: Add sysfs ABI documentation for CTI Mathieu Poirier
2020-03-09 16:17 ` [PATCH 12/13] Update MAINTAINERS to add reviewer for CoreSight Mathieu Poirier
2020-03-09 16:17 ` [PATCH 13/13] coresight: cti: Remove unnecessary NULL check in cti_sig_type_name Mathieu Poirier
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