cns3xxx: add PPS support for laguna

Many Laguna products have on-board GPS with Pulse-per-second (PPS)
support.  This patch adds kernel support (statically) and adds
the platform data in laguna board support.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@34115 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/target/linux/cns3xxx/config-3.3 b/target/linux/cns3xxx/config-3.3
index 6963747..4090b31 100644 (file)
--- a/target/linux/cns3xxx/config-3.3
+++ b/target/linux/cns3xxx/config-3.3
@@ -131,6 +131,7 @@ CONFIG_NEED_DMA_MAP_STATE=y
 CONFIG_NET_VENDOR_CAVIUM=y
 CONFIG_NLS=y
 CONFIG_NR_CPUS=2
+CONFIG_NTP_PPS=y
 CONFIG_OUTER_CACHE=y
 CONFIG_OUTER_CACHE_SYNC=y
 CONFIG_PAGEFLAGS_EXTENDED=y
@@ -143,7 +144,13 @@ CONFIG_PHYLIB=y
 CONFIG_PL310_ERRATA_588369=y
 CONFIG_PL310_ERRATA_727915=y
 CONFIG_PL310_ERRATA_769419=y
+CONFIG_PPS=y
+CONFIG_PPS_CLIENT_GPIO=y
+# CONFIG_PPS_CLIENT_KTIMER is not set
+# CONFIG_PPS_CLIENT_LDISC is not set
+# CONFIG_PPS_DEBUG is not set
 # CONFIG_PREEMPT_RCU is not set
+# CONFIG_PTP_1588_CLOCK is not set
 CONFIG_RAID_ATTRS=y
 CONFIG_RFS_ACCEL=y
 CONFIG_RPS=y

diff --git a/target/linux/cns3xxx/files/arch/arm/mach-cns3xxx/laguna.c b/target/linux/cns3xxx/files/arch/arm/mach-cns3xxx/laguna.c
index 8543183..8b611c5 100644 (file)
--- a/target/linux/cns3xxx/files/arch/arm/mach-cns3xxx/laguna.c
+++ b/target/linux/cns3xxx/files/arch/arm/mach-cns3xxx/laguna.c
@@ -36,6 +36,7 @@
 #include <linux/spi/spi.h>
 #include <linux/spi/flash.h>
 #include <linux/if_ether.h>
+#include <linux/pps-gpio.h>
 #include <asm/setup.h>
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
@@ -581,6 +582,22 @@ static struct platform_device laguna_watchdog = {
 };
 
 /*
+ * GPS PPS
+ */
+static struct pps_gpio_platform_data laguna_pps_data = {
+       .gpio_pin = 0,
+       .gpio_label = "GPS_PPS",
+       .assert_falling_edge = 0,
+       .capture_clear = 0,
+};
+
+static struct platform_device laguna_pps_device = {
+       .name = "pps-gpio",
+       .id = -1,
+       .dev.platform_data = &laguna_pps_data,
+};
+
+/*
  * GPIO
  */
 
@@ -869,6 +886,9 @@ static int __init laguna_model_setup(void)
                    (laguna_info.config_bitmap & SPI1_LOAD))
                        platform_device_register(&laguna_spi_controller);
 
+               if (laguna_info.config2_bitmap & GPS_LOAD)
+                       platform_device_register(&laguna_pps_device);
+
                /*
                 * Do any model specific setup not known by the bitmap by matching
                 *  the first 6 characters of the model name