diff options
| author | Wu Hao <hao.wu@intel.com> | 2018-06-30 08:53:12 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-07-15 13:55:44 +0200 |
| commit | 41a8b2c56470b7e4e3e2db93324d50bbbf60cdc4 (patch) | |
| tree | 4e3314c007e056d39805aa8e49cd42678ac9926a /drivers | |
| parent | 99a560bde313892f87ca81db568a829d3d205882 (diff) | |
| download | linux-41a8b2c56470b7e4e3e2db93324d50bbbf60cdc4.tar.bz2 | |
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')
| -rw-r--r-- | drivers/fpga/fpga-region.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/fpga/fpga-region.c b/drivers/fpga/fpga-region.c index 6d214d75c7be..0d65220d5ec5 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; |