On Thu, Aug 22, 2019 at 08:07:01AM -0700, Moritz Fischer wrote:
> Hi Hao,
>
> On Mon, Aug 12, 2019 at 10:49:58AM +0800, Wu Hao wrote:
> > This patch takes advantage of driver core which helps to create
> > and remove sysfs attribute files, so there is no need to register
> > sysfs entries manually in dfl-afu platform river code.
> Same nit: s/river/driver
> >
> > Signed-off-by: Wu Hao <hao...@intel.com>
> Acked-by: Moritz Fischer <m...@kernel.org>
Hi Moritz
Thanks a lot for the review. : )
Have you got a chance to look into the other patches in this patchset?
Thanks
Hao
> > ---
> > drivers/fpga/dfl-afu-main.c | 69
> > +++++++++++++++++++++++----------------------
> > 1 file changed, 36 insertions(+), 33 deletions(-)
> >
> > diff --git a/drivers/fpga/dfl-afu-main.c b/drivers/fpga/dfl-afu-main.c
> > index e50c45e..e955149 100644
> > --- a/drivers/fpga/dfl-afu-main.c
> > +++ b/drivers/fpga/dfl-afu-main.c
> > @@ -282,24 +282,17 @@ static int port_get_id(struct platform_device *pdev)
> > &dev_attr_power_state.attr,
> > NULL,
> > };
> > -ATTRIBUTE_GROUPS(port_hdr);
> > +
> > +static const struct attribute_group port_hdr_group = {
> > + .attrs = port_hdr_attrs,
> > +};
> >
> > static int port_hdr_init(struct platform_device *pdev,
> > struct dfl_feature *feature)
> > {
> > - dev_dbg(&pdev->dev, "PORT HDR Init.\n");
> > -
> > port_reset(pdev);
> >
> > - return device_add_groups(&pdev->dev, port_hdr_groups);
> > -}
> > -
> > -static void port_hdr_uinit(struct platform_device *pdev,
> > - struct dfl_feature *feature)
> > -{
> > - dev_dbg(&pdev->dev, "PORT HDR UInit.\n");
> > -
> > - device_remove_groups(&pdev->dev, port_hdr_groups);
> > + return 0;
> > }
> >
> > static long
> > @@ -330,7 +323,6 @@ static void port_hdr_uinit(struct platform_device *pdev,
> >
> > static const struct dfl_feature_ops port_hdr_ops = {
> > .init = port_hdr_init,
> > - .uinit = port_hdr_uinit,
> > .ioctl = port_hdr_ioctl,
> > };
> >
> > @@ -361,32 +353,37 @@ static void port_hdr_uinit(struct platform_device
> > *pdev,
> > &dev_attr_afu_id.attr,
> > NULL
> > };
> > -ATTRIBUTE_GROUPS(port_afu);
> >
> > -static int port_afu_init(struct platform_device *pdev,
> > - struct dfl_feature *feature)
> > +static umode_t port_afu_attrs_visible(struct kobject *kobj,
> > + struct attribute *attr, int n)
> > {
> > - struct resource *res = &pdev->resource[feature->resource_index];
> > - int ret;
> > -
> > - dev_dbg(&pdev->dev, "PORT AFU Init.\n");
> > + struct device *dev = kobj_to_dev(kobj);
> >
> > - ret = afu_mmio_region_add(dev_get_platdata(&pdev->dev),
> > - DFL_PORT_REGION_INDEX_AFU, resource_size(res),
> > - res->start, DFL_PORT_REGION_READ |
> > - DFL_PORT_REGION_WRITE | DFL_PORT_REGION_MMAP);
> > - if (ret)
> > - return ret;
> > + /*
> > + * sysfs entries are visible only if related private feature is
> > + * enumerated.
> > + */
> > + if (!dfl_get_feature_by_id(dev, PORT_FEATURE_ID_AFU))
> > + return 0;
> >
> > - return device_add_groups(&pdev->dev, port_afu_groups);
> > + return attr->mode;
> > }
> >
> > -static void port_afu_uinit(struct platform_device *pdev,
> > - struct dfl_feature *feature)
> > +static const struct attribute_group port_afu_group = {
> > + .attrs = port_afu_attrs,
> > + .is_visible = port_afu_attrs_visible,
> > +};
> > +
> > +static int port_afu_init(struct platform_device *pdev,
> > + struct dfl_feature *feature)
> > {
> > - dev_dbg(&pdev->dev, "PORT AFU UInit.\n");
> Thanks.
> > + struct resource *res = &pdev->resource[feature->resource_index];
> >
> > - device_remove_groups(&pdev->dev, port_afu_groups);
> > + return afu_mmio_region_add(dev_get_platdata(&pdev->dev),
> > + DFL_PORT_REGION_INDEX_AFU,
> > + resource_size(res), res->start,
> > + DFL_PORT_REGION_MMAP | DFL_PORT_REGION_READ |
> > + DFL_PORT_REGION_WRITE);
> > }
> >
> > static const struct dfl_feature_id port_afu_id_table[] = {
> > @@ -396,7 +393,6 @@ static void port_afu_uinit(struct platform_device *pdev,
> >
> > static const struct dfl_feature_ops port_afu_ops = {
> > .init = port_afu_init,
> > - .uinit = port_afu_uinit,
> > };
> >
> > static struct dfl_feature_driver port_feature_drvs[] = {
> > @@ -748,9 +744,16 @@ static int afu_remove(struct platform_device *pdev)
> > return 0;
> > }
> >
> > +static const struct attribute_group *afu_dev_groups[] = {
> > + &port_hdr_group,
> > + &port_afu_group,
> > + NULL
> > +};
> > +
> > static struct platform_driver afu_driver = {
> > .driver = {
> > - .name = DFL_FPGA_FEATURE_DEV_PORT,
> > + .name = DFL_FPGA_FEATURE_DEV_PORT,
> > + .dev_groups = afu_dev_groups,
> > },
> > .probe = afu_probe,
> > .remove = afu_remove,
> > --
> > 1.8.3.1
> >
>
> Thanks,
> Moritz
