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

   1 From d3ea04a7506cca51d1e154cde5bcc7063595c98c 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 025/174] 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 --- a/arch/arm/mach-bcm2708/bcm2708.c
  12 +++ b/arch/arm/mach-bcm2708/bcm2708.c
  13 @@ -32,6 +32,7 @@
  14  #include <linux/io.h>
  15  #include <linux/module.h>
  16  #include <linux/spi/spi.h>
  17 +#include <linux/w1-gpio.h>
  18
  19  #include <linux/version.h>
  20  #include <linux/clkdev.h>
  21 @@ -71,6 +72,9 @@
  22   */
  23  #define DMA_MASK_BITS_COMMON 32
  24
  25 +// use GPIO 4 for the one-wire GPIO pin, if enabled
  26 +#define W1_GPIO 4
  27 +
  28  /* command line parameters */
  29  static unsigned boardrev, serial;
  30  static unsigned uart_clock;
  31 @@ -251,6 +255,19 @@ static struct platform_device bcm2708_dm
  32         .num_resources = ARRAY_SIZE(bcm2708_dmaman_resources),
  33  };
  34
  35 +#if defined(CONFIG_W1_MASTER_GPIO) || defined(CONFIG_W1_MASTER_GPIO_MODULE)
  36 +static struct w1_gpio_platform_data w1_gpio_pdata = {
  37 +       .pin = W1_GPIO,
  38 +       .is_open_drain = 0,
  39 +};
  40 +
  41 +static struct platform_device w1_device = {
  42 +       .name = "w1-gpio",
  43 +       .id = -1,
  44 +       .dev.platform_data = &w1_gpio_pdata,
  45 +};
  46 +#endif
  47 +
  48  static u64 fb_dmamask = DMA_BIT_MASK(DMA_MASK_BITS_COMMON);
  49
  50  static struct platform_device bcm2708_fb_device = {
  51 @@ -620,6 +637,9 @@ void __init bcm2708_init(void)
  52  #ifdef CONFIG_BCM2708_GPIO
  53         bcm_register_device(&bcm2708_gpio_device);
  54  #endif
  55 +#if defined(CONFIG_W1_MASTER_GPIO) || defined(CONFIG_W1_MASTER_GPIO_MODULE)
  56 +       platform_device_register(&w1_device);
  57 +#endif
  58         bcm_register_device(&bcm2708_systemtimer_device);
  59         bcm_register_device(&bcm2708_fb_device);
  60         bcm_register_device(&bcm2708_usb_device);