aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/fpga
diff options
context:
space:
mode:
authorWu Hao <hao.wu@intel.com>2018-06-30 00:53:12 (GMT)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-07-15 11:55:44 (GMT)
commit41a8b2c56470b7e4e3e2db93324d50bbbf60cdc4 (patch)
tree4e3314c007e056d39805aa8e49cd42678ac9926a /drivers/fpga
parent99a560bde313892f87ca81db568a829d3d205882 (diff)
fpga: region: add compat_id support
This patch introduces a compat_id pointer member and sysfs interface for each fpga region, similar as compat_id for fpga manager, it allows applications to read the per region compat_id for compatibility checking before other actions on this fpga-region (e.g. PR). Signed-off-by: Wu Hao <hao.wu@intel.com> Acked-by: Alan Tull <atull@kernel.org> Acked-by: Moritz Fischer <mdf@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/fpga')
-rw-r--r--drivers/fpga/fpga-region.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/fpga/fpga-region.c b/drivers/fpga/fpga-region.c
index 6d214d7..0d65220 100644
--- a/drivers/fpga/fpga-region.c
+++ b/drivers/fpga/fpga-region.c
@@ -158,6 +158,27 @@ err_put_region:
}
EXPORT_SYMBOL_GPL(fpga_region_program_fpga);
+static ssize_t compat_id_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct fpga_region *region = to_fpga_region(dev);
+
+ if (!region->compat_id)
+ return -ENOENT;
+
+ return sprintf(buf, "%016llx%016llx\n",
+ (unsigned long long)region->compat_id->id_h,
+ (unsigned long long)region->compat_id->id_l);
+}
+
+static DEVICE_ATTR_RO(compat_id);
+
+static struct attribute *fpga_region_attrs[] = {
+ &dev_attr_compat_id.attr,
+ NULL,
+};
+ATTRIBUTE_GROUPS(fpga_region);
+
/**
* fpga_region_create - alloc and init a struct fpga_region
* @dev: device parent
@@ -258,6 +279,7 @@ static int __init fpga_region_init(void)
if (IS_ERR(fpga_region_class))
return PTR_ERR(fpga_region_class);
+ fpga_region_class->dev_groups = fpga_region_groups;
fpga_region_class->dev_release = fpga_region_dev_release;
return 0;

Privacy Policy