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fpga: region: add compat_id support

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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>
This commit is contained in:
Wu Hao 2018-06-30 08:53:12 +08:00 • committed by Greg Kroah-Hartman
parent 99a560bde3
commit 41a8b2c564
3 changed files with 33 additions and 0 deletions
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22
drivers/fpga/fpga-region.c
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@ -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;