diff options
Diffstat (limited to 'target/linux/brcm2708/patches-3.18/0081-Added-support-to-reserve-enable-a-GPIO-pin-to-be-use.patch')
-rwxr-xr-x | target/linux/brcm2708/patches-3.18/0081-Added-support-to-reserve-enable-a-GPIO-pin-to-be-use.patch | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-3.18/0081-Added-support-to-reserve-enable-a-GPIO-pin-to-be-use.patch b/target/linux/brcm2708/patches-3.18/0081-Added-support-to-reserve-enable-a-GPIO-pin-to-be-use.patch new file mode 100755 index 0000000000..f9cc88f4c5 --- /dev/null +++ b/target/linux/brcm2708/patches-3.18/0081-Added-support-to-reserve-enable-a-GPIO-pin-to-be-use.patch @@ -0,0 +1,79 @@ +From 47a2d8098a9523435aec2fff1389ae92fd8791a9 Mon Sep 17 00:00:00 2001 +From: Timo Kokkonen <tjko@iki.fi> +Date: Wed, 29 Oct 2014 23:30:30 -0700 +Subject: [PATCH 081/114] 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 +++++++++++++++++++++++++++ + 1 file changed, 27 insertions(+) + +diff --git a/arch/arm/mach-bcm2708/bcm2708.c b/arch/arm/mach-bcm2708/bcm2708.c +index b36037b..762e17c 100644 +--- 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> +@@ -93,6 +94,7 @@ static unsigned disk_led_active_low = 1; + static unsigned reboot_part = 0; + static unsigned w1_gpio_pin = W1_GPIO; + static unsigned w1_gpio_pullup = W1_PULLUP; ++static int pps_gpio_pin = -1; + static bool vc_i2c_override = false; + + static unsigned use_dt = 0; +@@ -274,6 +276,19 @@ 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 = { +@@ -841,6 +856,16 @@ 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; +@@ -1101,5 +1126,7 @@ module_param(disk_led_active_low, uint, 0644); + module_param(reboot_part, uint, 0644); + module_param(w1_gpio_pin, uint, 0644); + module_param(w1_gpio_pullup, uint, 0644); ++module_param(pps_gpio_pin, int, 0644); ++MODULE_PARM_DESC(pps_gpio_pin, "Set GPIO pin to reserve for PPS"); + module_param(vc_i2c_override, bool, 0644); + MODULE_PARM_DESC(vc_i2c_override, "Allow the use of VC's I2C peripheral."); +-- +1.8.3.2 + |