target/linux/brcm2708/patches-4.1/0051-Added-support-to-reserve-enable-a-GPIO-pin-to-be-use.patch

   1 From 9ec46a1866cc3e5f1f672fbf5d8763d28f4eba61 Mon Sep 17 00:00:00 2001
   2 From: Timo Kokkonen <tjko@iki.fi>
   3 Date: Wed, 29 Oct 2014 23:30:30 -0700
   4 Subject: [PATCH 051/171] Added support to reserve/enable a GPIO pin to be used
   5  from pps-gpio module (LinuxPPS). Enable PPS modules in default config for
   6  RPi.
   7
   8 ---
   9  arch/arm/mach-bcm2708/bcm2708.c | 27 +++++++++++++++++++++++++++
  10  arch/arm/mach-bcm2709/bcm2709.c | 27 +++++++++++++++++++++++++++
  11  2 files changed, 54 insertions(+)
  12
  13 --- a/arch/arm/mach-bcm2708/bcm2708.c
  14 +++ b/arch/arm/mach-bcm2708/bcm2708.c
  15 @@ -37,6 +37,7 @@
  16  #include <linux/spi/spi.h>
  17  #include <linux/gpio/machine.h>
  18  #include <linux/w1-gpio.h>
  19 +#include <linux/pps-gpio.h>
  20
  21  #include <linux/version.h>
  22  #include <linux/clkdev.h>
  23 @@ -92,6 +93,7 @@ static unsigned reboot_part = 0;
  24  static unsigned w1_gpio_pin = W1_GPIO;
  25  static unsigned w1_gpio_pullup = W1_PULLUP;
  26  static bool vc_i2c_override = false;
  27 +static int pps_gpio_pin = -1;
  28
  29  static unsigned use_dt = 0;
  30
  31 @@ -325,6 +327,19 @@ static struct platform_device w1_device
  32  };
  33  #endif
  34
  35 +static struct pps_gpio_platform_data pps_gpio_info = {
  36 +       .assert_falling_edge = false,
  37 +       .capture_clear = false,
  38 +       .gpio_pin = -1,
  39 +       .gpio_label = "PPS",
  40 +};
  41 +
  42 +static struct platform_device pps_gpio_device = {
  43 +       .name = "pps-gpio",
  44 +       .id = PLATFORM_DEVID_NONE,
  45 +       .dev.platform_data = &pps_gpio_info,
  46 +};
  47 +
  48  static u64 fb_dmamask = DMA_BIT_MASK(DMA_MASK_BITS_COMMON);
  49
  50  static struct platform_device bcm2708_fb_device = {
  51 @@ -860,6 +875,16 @@ void __init bcm2708_init(void)
  52  #ifdef CONFIG_BCM2708_GPIO
  53         bcm_register_device_dt(&bcm2708_gpio_device);
  54  #endif
  55 +
  56 +#if defined(CONFIG_PPS_CLIENT_GPIO) || defined(CONFIG_PPS_CLIENT_GPIO_MODULE)
  57 +       if (!use_dt && (pps_gpio_pin >= 0)) {
  58 +               pr_info("bcm2708: GPIO %d setup as pps-gpio device\n", pps_gpio_pin);
  59 +               pps_gpio_info.gpio_pin = pps_gpio_pin;
  60 +               pps_gpio_device.id = pps_gpio_pin;
  61 +               bcm_register_device(&pps_gpio_device);
  62 +       }
  63 +#endif
  64 +
  65  #if defined(CONFIG_W1_MASTER_GPIO) || defined(CONFIG_W1_MASTER_GPIO_MODULE)
  66         w1_gpio_pdata.pin = w1_gpio_pin;
  67         w1_gpio_pdata.ext_pullup_enable_pin = w1_gpio_pullup;
  68 @@ -1116,3 +1141,5 @@ module_param(w1_gpio_pin, uint, 0644);
  69  module_param(w1_gpio_pullup, uint, 0644);
  70  module_param(vc_i2c_override, bool, 0644);
  71  MODULE_PARM_DESC(vc_i2c_override, "Allow the use of VC's I2C peripheral.");
  72 +module_param(pps_gpio_pin, int, 0644);
  73 +MODULE_PARM_DESC(pps_gpio_pin, "Set GPIO pin to reserve for PPS");
  74 --- a/arch/arm/mach-bcm2709/bcm2709.c
  75 +++ b/arch/arm/mach-bcm2709/bcm2709.c
  76 @@ -37,6 +37,7 @@
  77  #include <linux/spi/spi.h>
  78  #include <linux/gpio/machine.h>
  79  #include <linux/w1-gpio.h>
  80 +#include <linux/pps-gpio.h>
  81
  82  #include <linux/version.h>
  83  #include <linux/clkdev.h>
  84 @@ -94,6 +95,7 @@ static unsigned reboot_part = 0;
  85  static unsigned w1_gpio_pin = W1_GPIO;
  86  static unsigned w1_gpio_pullup = W1_PULLUP;
  87  static bool vc_i2c_override = false;
  88 +static int pps_gpio_pin = -1;
  89
  90  static unsigned use_dt = 0;
  91
  92 @@ -335,6 +337,19 @@ static struct platform_device w1_device
  93  };
  94  #endif
  95
  96 +static struct pps_gpio_platform_data pps_gpio_info = {
  97 +       .assert_falling_edge = false,
  98 +       .capture_clear = false,
  99 +       .gpio_pin = -1,
 100 +       .gpio_label = "PPS",
 101 +};
 102 +
 103 +static struct platform_device pps_gpio_device = {
 104 +       .name = "pps-gpio",
 105 +       .id = PLATFORM_DEVID_NONE,
 106 +       .dev.platform_data = &pps_gpio_info,
 107 +};
 108 +
 109  static u64 fb_dmamask = DMA_BIT_MASK(DMA_MASK_BITS_COMMON);
 110
 111  static struct platform_device bcm2708_fb_device = {
 112 @@ -880,6 +895,16 @@ void __init bcm2709_init(void)
 113  #ifdef CONFIG_BCM2708_GPIO
 114         bcm_register_device_dt(&bcm2708_gpio_device);
 115  #endif
 116 +
 117 +#if defined(CONFIG_PPS_CLIENT_GPIO) || defined(CONFIG_PPS_CLIENT_GPIO_MODULE)
 118 +       if (!use_dt && (pps_gpio_pin >= 0)) {
 119 +               pr_info("bcm2709: GPIO %d setup as pps-gpio device\n", pps_gpio_pin);
 120 +               pps_gpio_info.gpio_pin = pps_gpio_pin;
 121 +               pps_gpio_device.id = pps_gpio_pin;
 122 +               bcm_register_device(&pps_gpio_device);
 123 +       }
 124 +#endif
 125 +
 126  #if defined(CONFIG_W1_MASTER_GPIO) || defined(CONFIG_W1_MASTER_GPIO_MODULE)
 127         w1_gpio_pdata.pin = w1_gpio_pin;
 128         w1_gpio_pdata.ext_pullup_enable_pin = w1_gpio_pullup;
 129 @@ -1284,3 +1309,5 @@ module_param(w1_gpio_pin, uint, 0644);
 130  module_param(w1_gpio_pullup, uint, 0644);
 131  module_param(vc_i2c_override, bool, 0644);
 132  MODULE_PARM_DESC(vc_i2c_override, "Allow the use of VC's I2C peripheral.");
 133 +module_param(pps_gpio_pin, int, 0644);
 134 +MODULE_PARM_DESC(pps_gpio_pin, "Set GPIO pin to reserve for PPS");