target/linux/brcm2708/patches-3.10/0025-enabling-the-realtime-clock-1-wire-chip-DS1307-and-1.patch

   1 From b0ffe239799004245e53a998216d361f6ab67f96 Mon Sep 17 00:00:00 2001
   2 From: popcornmix <popcornmix@gmail.com>
   3 Date: Wed, 8 May 2013 11:46:50 +0100
   4 Subject: [PATCH 025/196] enabling the realtime clock 1-wire chip DS1307 and
   5  1-wire on GPIO4 (as a module)
   6
   7 ---
   8  arch/arm/mach-bcm2708/bcm2708.c | 20 ++++++++++++++++++++
   9  1 file changed, 20 insertions(+)
  10
  11 diff --git a/arch/arm/mach-bcm2708/bcm2708.c b/arch/arm/mach-bcm2708/bcm2708.c
  12 index 03b8ec5..18f7ede 100644
  13 --- a/arch/arm/mach-bcm2708/bcm2708.c
  14 +++ b/arch/arm/mach-bcm2708/bcm2708.c
  15 @@ -32,6 +32,7 @@
  16  #include <linux/io.h>
  17  #include <linux/module.h>
  18  #include <linux/spi/spi.h>
  19 +#include <linux/w1-gpio.h>
  20
  21  #include <linux/version.h>
  22  #include <linux/clkdev.h>
  23 @@ -71,6 +72,9 @@
  24   */
  25  #define DMA_MASK_BITS_COMMON 32
  26
  27 +// use GPIO 4 for the one-wire GPIO pin, if enabled
  28 +#define W1_GPIO 4
  29 +
  30  /* command line parameters */
  31  static unsigned boardrev, serial;
  32  static unsigned uart_clock;
  33 @@ -251,6 +255,19 @@ static struct platform_device bcm2708_dmaman_device = {
  34         .num_resources = ARRAY_SIZE(bcm2708_dmaman_resources),
  35  };
  36
  37 +#if defined(CONFIG_W1_MASTER_GPIO) || defined(CONFIG_W1_MASTER_GPIO_MODULE)
  38 +static struct w1_gpio_platform_data w1_gpio_pdata = {
  39 +       .pin = W1_GPIO,
  40 +       .is_open_drain = 0,
  41 +};
  42 +
  43 +static struct platform_device w1_device = {
  44 +       .name = "w1-gpio",
  45 +       .id = -1,
  46 +       .dev.platform_data = &w1_gpio_pdata,
  47 +};
  48 +#endif
  49 +
  50  static u64 fb_dmamask = DMA_BIT_MASK(DMA_MASK_BITS_COMMON);
  51
  52  static struct platform_device bcm2708_fb_device = {
  53 @@ -620,6 +637,9 @@ void __init bcm2708_init(void)
  54  #ifdef CONFIG_BCM2708_GPIO
  55         bcm_register_device(&bcm2708_gpio_device);
  56  #endif
  57 +#if defined(CONFIG_W1_MASTER_GPIO) || defined(CONFIG_W1_MASTER_GPIO_MODULE)
  58 +       platform_device_register(&w1_device);
  59 +#endif
  60         bcm_register_device(&bcm2708_systemtimer_device);
  61         bcm_register_device(&bcm2708_fb_device);
  62         bcm_register_device(&bcm2708_usb_device);
  63 --
  64 1.9.1
  65