1 // SPDX-License-Identifier: GPL-2.0
3 * Regulator event over netlink
5 * Author: Naresh Solanki <Naresh.Solanki@9elements.com>
8 #include <regulator/regulator.h>
9 #include <net/netlink.h>
10 #include <net/genetlink.h>
11 #include <linux/atomic.h>
15 static atomic_t reg_event_seqnum = ATOMIC_INIT(0);
17 static const struct genl_multicast_group reg_event_mcgrps[] = {
18 { .name = REG_GENL_MCAST_GROUP_NAME, },
21 static struct genl_family reg_event_genl_family __ro_after_init = {
22 .module = THIS_MODULE,
23 .name = REG_GENL_FAMILY_NAME,
24 .version = REG_GENL_VERSION,
25 .maxattr = REG_GENL_ATTR_MAX,
26 .mcgrps = reg_event_mcgrps,
27 .n_mcgrps = ARRAY_SIZE(reg_event_mcgrps),
30 int reg_generate_netlink_event(const char *reg_name, u64 event)
34 struct reg_genl_event *edata;
39 size = nla_total_size(sizeof(struct reg_genl_event)) +
42 skb = genlmsg_new(size, GFP_ATOMIC);
46 /* add the genetlink message header */
47 msg_header = genlmsg_put(skb, 0, atomic_inc_return(®_event_seqnum),
48 ®_event_genl_family, 0, REG_GENL_CMD_EVENT);
55 attr = nla_reserve(skb, REG_GENL_ATTR_EVENT, sizeof(struct reg_genl_event));
61 edata = nla_data(attr);
62 memset(edata, 0, sizeof(struct reg_genl_event));
64 strscpy(edata->reg_name, reg_name, sizeof(edata->reg_name));
67 /* send multicast genetlink message */
68 genlmsg_end(skb, msg_header);
69 size = genlmsg_multicast(®_event_genl_family, skb, 0, 0, GFP_ATOMIC);
74 static int __init reg_event_genetlink_init(void)
76 return genl_register_family(®_event_genl_family);
79 static int __init reg_event_init(void)
83 /* create genetlink for acpi event */
84 error = reg_event_genetlink_init();
86 pr_warn("Failed to create genetlink family for reg event\n");
91 fs_initcall(reg_event_init);