target/linux/brcm2708/patches-3.18/0097-bcm2709-Port-pps-gpio-and-i2c-patches.patch

   1 From aca6741a1d26736f6000d18b3c60a18a313be6ea Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.org>
   3 Date: Mon, 26 Jan 2015 17:40:22 +0000
   4 Subject: [PATCH 097/114] bcm2709: Port pps-gpio and i2c patches
   5
   6 ---
   7  arch/arm/mach-bcm2709/bcm2709.c | 41 +++++++++++++++++++++++++++++++++++++++--
   8  1 file changed, 39 insertions(+), 2 deletions(-)
   9
  10 --- a/arch/arm/mach-bcm2709/bcm2709.c
  11 +++ b/arch/arm/mach-bcm2709/bcm2709.c
  12 @@ -37,6 +37,7 @@
  13  #include <linux/spi/spi.h>
  14  #include <linux/gpio/machine.h>
  15  #include <linux/w1-gpio.h>
  16 +#include <linux/pps-gpio.h>
  17
  18  #include <linux/version.h>
  19  #include <linux/clkdev.h>
  20 @@ -95,6 +96,8 @@ static unsigned disk_led_active_low = 1;
  21  static unsigned reboot_part = 0;
  22  static unsigned w1_gpio_pin = W1_GPIO;
  23  static unsigned w1_gpio_pullup = W1_PULLUP;
  24 +static int pps_gpio_pin = -1;
  25 +static bool vc_i2c_override = false;
  26
  27  static unsigned use_dt = 0;
  28
  29 @@ -283,6 +286,19 @@ static struct platform_device w1_device
  30  };
  31  #endif
  32
  33 +static struct pps_gpio_platform_data pps_gpio_info = {
  34 +       .assert_falling_edge = false,
  35 +       .capture_clear = false,
  36 +       .gpio_pin = -1,
  37 +       .gpio_label = "PPS",
  38 +};
  39 +
  40 +static struct platform_device pps_gpio_device = {
  41 +       .name = "pps-gpio",
  42 +       .id = PLATFORM_DEVID_NONE,
  43 +       .dev.platform_data = &pps_gpio_info,
  44 +};
  45 +
  46  static u64 fb_dmamask = DMA_BIT_MASK(DMA_MASK_BITS_COMMON);
  47
  48  static struct platform_device bcm2708_fb_device = {
  49 @@ -860,6 +876,16 @@ void __init bcm2709_init(void)
  50  #ifdef CONFIG_BCM2708_GPIO
  51         bcm_register_device_dt(&bcm2708_gpio_device);
  52  #endif
  53 +
  54 +#if defined(CONFIG_PPS_CLIENT_GPIO) || defined(CONFIG_PPS_CLIENT_GPIO_MODULE)
  55 +       if (!use_dt && (pps_gpio_pin >= 0)) {
  56 +               pr_info("bcm2709: GPIO %d setup as pps-gpio device\n", pps_gpio_pin);
  57 +               pps_gpio_info.gpio_pin = pps_gpio_pin;
  58 +               pps_gpio_device.id = pps_gpio_pin;
  59 +               bcm_register_device(&pps_gpio_device);
  60 +       }
  61 +#endif
  62 +
  63  #if defined(CONFIG_W1_MASTER_GPIO) || defined(CONFIG_W1_MASTER_GPIO_MODULE)
  64         w1_gpio_pdata.pin = w1_gpio_pin;
  65         w1_gpio_pdata.ext_pullup_enable_pin = w1_gpio_pullup;
  66 @@ -884,8 +910,15 @@ void __init bcm2709_init(void)
  67         bcm_register_device(&bcm2835_thermal_device);
  68
  69         bcm_register_device_dt(&bcm2708_spi_device);
  70 -       bcm_register_device_dt(&bcm2708_bsc0_device);
  71 -       bcm_register_device_dt(&bcm2708_bsc1_device);
  72 +
  73 +       if (vc_i2c_override) {
  74 +               bcm_register_device_dt(&bcm2708_bsc0_device);
  75 +               bcm_register_device_dt(&bcm2708_bsc1_device);
  76 +       } else if ((boardrev & 0xffffff) == 0x2 || (boardrev & 0xffffff) == 0x3) {
  77 +               bcm_register_device_dt(&bcm2708_bsc0_device);
  78 +       } else {
  79 +               bcm_register_device_dt(&bcm2708_bsc1_device);
  80 +       }
  81
  82  #if defined(CONFIG_SND_BCM2708_SOC_I2S) || defined(CONFIG_SND_BCM2708_SOC_I2S_MODULE)
  83         bcm_register_device_dt(&bcm2708_i2s_device);
  84 @@ -1245,3 +1278,7 @@ module_param(disk_led_active_low, uint,
  85  module_param(reboot_part, uint, 0644);
  86  module_param(w1_gpio_pin, uint, 0644);
  87  module_param(w1_gpio_pullup, uint, 0644);
  88 +module_param(pps_gpio_pin, int, 0644);
  89 +MODULE_PARM_DESC(pps_gpio_pin, "Set GPIO pin to reserve for PPS");
  90 +module_param(vc_i2c_override, bool, 0644);
  91 +MODULE_PARM_DESC(vc_i2c_override, "Allow the use of VC's I2C peripheral.");