diff options
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.patch | 134 |
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 0000000..b367e62 --- /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 4d818efc09ca08d42fabd91c10c75556b0ab9164 Mon Sep 17 00:00:00 2001 +From: Timo Kokkonen <tjko@iki.fi> +Date: Wed, 29 Oct 2014 23:30:30 -0700 +Subject: [PATCH 051/203] 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"); |