| 1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374 |
- 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(+)
- --- 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,
- 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.");
|
