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Diffstat (limited to 'target/linux/brcm2708/patches-4.1/0051-Added-support-to-reserve-enable-a-GPIO-pin-to-be-use.patch')
-rw-r--r--target/linux/brcm2708/patches-4.1/0051-Added-support-to-reserve-enable-a-GPIO-pin-to-be-use.patch134
1 files changed, 134 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.1/0051-Added-support-to-reserve-enable-a-GPIO-pin-to-be-use.patch b/target/linux/brcm2708/patches-4.1/0051-Added-support-to-reserve-enable-a-GPIO-pin-to-be-use.patch
new file mode 100644
index 0000000000..3b2eca9456
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.1/0051-Added-support-to-reserve-enable-a-GPIO-pin-to-be-use.patch
@@ -0,0 +1,134 @@
+From bc32dfd7d696d4e3c381344064aabc38961b7f46 Mon Sep 17 00:00:00 2001
+From: Timo Kokkonen <tjko@iki.fi>
+Date: Wed, 29 Oct 2014 23:30:30 -0700
+Subject: [PATCH 051/121] Added support to reserve/enable a GPIO pin to be used
+ from pps-gpio module (LinuxPPS). Enable PPS modules in default config for
+ RPi.
+
+---
+ arch/arm/mach-bcm2708/bcm2708.c | 27 +++++++++++++++++++++++++++
+ arch/arm/mach-bcm2709/bcm2709.c | 27 +++++++++++++++++++++++++++
+ 2 files changed, 54 insertions(+)
+
+--- a/arch/arm/mach-bcm2708/bcm2708.c
++++ b/arch/arm/mach-bcm2708/bcm2708.c
+@@ -37,6 +37,7 @@
+ #include <linux/spi/spi.h>
+ #include <linux/gpio/machine.h>
+ #include <linux/w1-gpio.h>
++#include <linux/pps-gpio.h>
+
+ #include <linux/version.h>
+ #include <linux/clkdev.h>
+@@ -92,6 +93,7 @@ static unsigned reboot_part = 0;
+ static unsigned w1_gpio_pin = W1_GPIO;
+ static unsigned w1_gpio_pullup = W1_PULLUP;
+ static bool vc_i2c_override = false;
++static int pps_gpio_pin = -1;
+
+ static unsigned use_dt = 0;
+
+@@ -325,6 +327,19 @@ static struct platform_device w1_device
+ };
+ #endif
+
++static struct pps_gpio_platform_data pps_gpio_info = {
++ .assert_falling_edge = false,
++ .capture_clear = false,
++ .gpio_pin = -1,
++ .gpio_label = "PPS",
++};
++
++static struct platform_device pps_gpio_device = {
++ .name = "pps-gpio",
++ .id = PLATFORM_DEVID_NONE,
++ .dev.platform_data = &pps_gpio_info,
++};
++
+ static u64 fb_dmamask = DMA_BIT_MASK(DMA_MASK_BITS_COMMON);
+
+ static struct platform_device bcm2708_fb_device = {
+@@ -860,6 +875,16 @@ void __init bcm2708_init(void)
+ #ifdef CONFIG_BCM2708_GPIO
+ bcm_register_device_dt(&bcm2708_gpio_device);
+ #endif
++
++#if defined(CONFIG_PPS_CLIENT_GPIO) || defined(CONFIG_PPS_CLIENT_GPIO_MODULE)
++ if (!use_dt && (pps_gpio_pin >= 0)) {
++ pr_info("bcm2708: GPIO %d setup as pps-gpio device\n", pps_gpio_pin);
++ pps_gpio_info.gpio_pin = pps_gpio_pin;
++ pps_gpio_device.id = pps_gpio_pin;
++ bcm_register_device(&pps_gpio_device);
++ }
++#endif
++
+ #if defined(CONFIG_W1_MASTER_GPIO) || defined(CONFIG_W1_MASTER_GPIO_MODULE)
+ w1_gpio_pdata.pin = w1_gpio_pin;
+ w1_gpio_pdata.ext_pullup_enable_pin = w1_gpio_pullup;
+@@ -1116,3 +1141,5 @@ module_param(w1_gpio_pin, uint, 0644);
+ module_param(w1_gpio_pullup, uint, 0644);
+ module_param(vc_i2c_override, bool, 0644);
+ MODULE_PARM_DESC(vc_i2c_override, "Allow the use of VC's I2C peripheral.");
++module_param(pps_gpio_pin, int, 0644);
++MODULE_PARM_DESC(pps_gpio_pin, "Set GPIO pin to reserve for PPS");
+--- a/arch/arm/mach-bcm2709/bcm2709.c
++++ b/arch/arm/mach-bcm2709/bcm2709.c
+@@ -37,6 +37,7 @@
+ #include <linux/spi/spi.h>
+ #include <linux/gpio/machine.h>
+ #include <linux/w1-gpio.h>
++#include <linux/pps-gpio.h>
+
+ #include <linux/version.h>
+ #include <linux/clkdev.h>
+@@ -94,6 +95,7 @@ static unsigned reboot_part = 0;
+ static unsigned w1_gpio_pin = W1_GPIO;
+ static unsigned w1_gpio_pullup = W1_PULLUP;
+ static bool vc_i2c_override = false;
++static int pps_gpio_pin = -1;
+
+ static unsigned use_dt = 0;
+
+@@ -335,6 +337,19 @@ static struct platform_device w1_device
+ };
+ #endif
+
++static struct pps_gpio_platform_data pps_gpio_info = {
++ .assert_falling_edge = false,
++ .capture_clear = false,
++ .gpio_pin = -1,
++ .gpio_label = "PPS",
++};
++
++static struct platform_device pps_gpio_device = {
++ .name = "pps-gpio",
++ .id = PLATFORM_DEVID_NONE,
++ .dev.platform_data = &pps_gpio_info,
++};
++
+ static u64 fb_dmamask = DMA_BIT_MASK(DMA_MASK_BITS_COMMON);
+
+ static struct platform_device bcm2708_fb_device = {
+@@ -880,6 +895,16 @@ void __init bcm2709_init(void)
+ #ifdef CONFIG_BCM2708_GPIO
+ bcm_register_device_dt(&bcm2708_gpio_device);
+ #endif
++
++#if defined(CONFIG_PPS_CLIENT_GPIO) || defined(CONFIG_PPS_CLIENT_GPIO_MODULE)
++ if (!use_dt && (pps_gpio_pin >= 0)) {
++ pr_info("bcm2709: GPIO %d setup as pps-gpio device\n", pps_gpio_pin);
++ pps_gpio_info.gpio_pin = pps_gpio_pin;
++ pps_gpio_device.id = pps_gpio_pin;
++ bcm_register_device(&pps_gpio_device);
++ }
++#endif
++
+ #if defined(CONFIG_W1_MASTER_GPIO) || defined(CONFIG_W1_MASTER_GPIO_MODULE)
+ w1_gpio_pdata.pin = w1_gpio_pin;
+ w1_gpio_pdata.ext_pullup_enable_pin = w1_gpio_pullup;
+@@ -1284,3 +1309,5 @@ module_param(w1_gpio_pin, uint, 0644);
+ module_param(w1_gpio_pullup, uint, 0644);
+ module_param(vc_i2c_override, bool, 0644);
+ MODULE_PARM_DESC(vc_i2c_override, "Allow the use of VC's I2C peripheral.");
++module_param(pps_gpio_pin, int, 0644);
++MODULE_PARM_DESC(pps_gpio_pin, "Set GPIO pin to reserve for PPS");