From 41a8b2c56470b7e4e3e2db93324d50bbbf60cdc4 Mon Sep 17 00:00:00 2001 From: Wu Hao Date: Sat, 30 Jun 2018 08:53:12 +0800 Subject: 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 Acked-by: Alan Tull Acked-by: Moritz Fischer Signed-off-by: Greg Kroah-Hartman --- drivers/fpga/fpga-region.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) (limited to 'drivers/fpga') 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; -- cgit