[source] kernel: other.mk: add pps-ldisc support

[LEDE Commits]

blogic pushed a commit to source.git, branch master:
https://git.lede-project.org/?p=source.git;a=commitdiff;h=66b67b743ffa2a55b64aeda4fe5e54da33227f43

commit 66b67b743ffa2a55b64aeda4fe5e54da33227f43
Author: Stephen Walker <stephendwalker+github at gmail.com>
AuthorDate: Wed Jun 29 18:34:50 2016 -0400

    kernel: other.mk: add pps-ldisc support
    
    The pps-ldisc kernel module supports Pulse-Per-Second connected with the CD (Carrier Detect) pin.
    
    Signed-off-by: Stephen Walker <stephendwalker+github at gmail.com>
---
 package/kernel/linux/modules/other.mk | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/package/kernel/linux/modules/other.mk b/package/kernel/linux/modules/other.mk
index 55fd455..85f7016 100644
--- a/package/kernel/linux/modules/other.mk
+++ b/package/kernel/linux/modules/other.mk
@@ -825,6 +825,23 @@ endef
 $(eval $(call KernelPackage,pps-gpio))
 
 
+define KernelPackage/pps-ldisc
+  SUBMENU:=$(OTHER_MENU)
+  TITLE:=PPS line discipline
+  DEPENDS:=+kmod-pps
+  KCONFIG:=CONFIG_PPS_CLIENT_LDISC
+  FILES:=$(LINUX_DIR)/drivers/pps/clients/pps-ldisc.ko
+  AUTOLOAD:=$(call AutoLoad,18,pps-ldisc,1)
+endef
+
+define KernelPackage/pps-ldisc/description
+ Support for a PPS source connected with the CD (Carrier
+ Detect) pin of your serial port.
+endef
+
+$(eval $(call KernelPackage,pps-ldisc))
+
+
 define KernelPackage/ptp
   SUBMENU:=$(OTHER_MENU)
   TITLE:=PTP clock support