w1: added w1 reset command

Command which allows to reset the bus.

Signed-off-by: Evgeniy Polyakov <zbr@ioremap.net>
Cc: Paul Alfille <paul.alfille@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/Documentation/w1/w1.netlink b/Documentation/w1/w1.netlink
index d596d40..2756681 100644 (file)
--- a/Documentation/w1/w1.netlink
+++ b/Documentation/w1/w1.netlink
@@ -112,6 +112,12 @@ cn_msg->len = sizeof(struct w1_netlink_msg) +
              sizeof(struct w1_netlink_cmd) +
              N*8;
 
+W1 reset command.
+[cn_msg]
+  [w1_netlink_msg type = W1_MASTER_CMD
+       id is equal to the bus master id to use for searching]
+  [w1_netlink_cmd cmd = W1_CMD_RESET]
+
 Operation steps in w1 core when new command is received.
 =======================================================
 

diff --git a/drivers/w1/w1_netlink.c b/drivers/w1/w1_netlink.c
index a94336b..f978c75 100644 (file)
--- a/drivers/w1/w1_netlink.c
+++ b/drivers/w1/w1_netlink.c
@@ -197,6 +197,9 @@ static int w1_process_command_master(struct w1_master *dev, struct cn_msg *req_m
        case W1_CMD_TOUCH:
                err = w1_process_command_io(dev, msg, hdr, cmd);
                break;
+       case W1_CMD_RESET:
+               err = w1_reset_bus(dev);
+               break;
        default:
                cmd->res = EINVAL;
                cn_netlink_send(msg, 0, GFP_KERNEL);

diff --git a/drivers/w1/w1_netlink.h b/drivers/w1/w1_netlink.h
index 01d86a7..68a4ff4 100644 (file)
--- a/drivers/w1/w1_netlink.h
+++ b/drivers/w1/w1_netlink.h
@@ -58,6 +58,7 @@ enum w1_commands {
        W1_CMD_SEARCH,
        W1_CMD_ALARM_SEARCH,
        W1_CMD_TOUCH,
+       W1_CMD_RESET,
        W1_CMD_MAX,
 };