target/linux/brcm2708/patches-3.10/0051-Added-inverted-transmitter-support.patch

   1 From 09eb4e8210da3acb95f874f3ed2292f13e1f6ad3 Mon Sep 17 00:00:00 2001
   2 From: pjennings <pjennings-git@pjennings.net>
   3 Date: Wed, 20 Feb 2013 17:51:43 -0600
   4 Subject: [PATCH 051/196] Added inverted transmitter support
   5
   6 ---
   7  drivers/staging/media/lirc/lirc_rpi.c | 17 +++++++++++------
   8  1 file changed, 11 insertions(+), 6 deletions(-)
   9
  10 diff --git a/drivers/staging/media/lirc/lirc_rpi.c b/drivers/staging/media/lirc/lirc_rpi.c
  11 index 96acab0..5bb0dfe 100644
  12 --- a/drivers/staging/media/lirc/lirc_rpi.c
  13 +++ b/drivers/staging/media/lirc/lirc_rpi.c
  14 @@ -68,6 +68,8 @@ static int debug;
  15  static int sense = -1;
  16  /* use softcarrier by default */
  17  static int softcarrier = 1;
  18 +/* 0 = do not invert output, 1 = invert output */
  19 +static int invert = 0;
  20
  21  struct gpio_chip *gpiochip;
  22  struct irq_chip *irqchip;
  23 @@ -135,10 +137,10 @@ static long send_pulse_softcarrier(unsigned long length)
  24         actual = 0; target = 0; flag = 0;
  25         while (actual < length) {
  26                 if (flag) {
  27 -                       gpiochip->set(gpiochip, gpio_out_pin, 0);
  28 +                       gpiochip->set(gpiochip, gpio_out_pin, invert);
  29                         target += space_width;
  30                 } else {
  31 -                       gpiochip->set(gpiochip, gpio_out_pin, 1);
  32 +                       gpiochip->set(gpiochip, gpio_out_pin, !invert);
  33                         target += pulse_width;
  34                 }
  35                 d = (target - actual -
  36 @@ -162,7 +164,7 @@ static long send_pulse(unsigned long length)
  37         if (softcarrier) {
  38                 return send_pulse_softcarrier(length);
  39         } else {
  40 -               gpiochip->set(gpiochip, gpio_out_pin, 1);
  41 +               gpiochip->set(gpiochip, gpio_out_pin, !invert);
  42                 safe_udelay(length);
  43                 return 0;
  44         }
  45 @@ -170,7 +172,7 @@ static long send_pulse(unsigned long length)
  46
  47  static void send_space(long length)
  48  {
  49 -       gpiochip->set(gpiochip, gpio_out_pin, 0);
  50 +       gpiochip->set(gpiochip, gpio_out_pin, invert);
  51         if (length <= 0)
  52                 return;
  53         safe_udelay(length);
  54 @@ -318,7 +320,7 @@ static int init_port(void)
  55
  56         gpiochip->direction_input(gpiochip, gpio_in_pin);
  57         gpiochip->direction_output(gpiochip, gpio_out_pin, 1);
  58 -       gpiochip->set(gpiochip, gpio_out_pin, 0);
  59 +       gpiochip->set(gpiochip, gpio_out_pin, invert);
  60
  61         irq = gpiochip->to_irq(gpiochip, gpio_in_pin);
  62         dprintk("to_irq %d\n", irq);
  63 @@ -457,7 +459,7 @@ static ssize_t lirc_write(struct file *file, const char *buf,
  64                 else
  65                         delta = send_pulse(wbuf[i]);
  66         }
  67 -       gpiochip->set(gpiochip, gpio_out_pin, 0);
  68 +       gpiochip->set(gpiochip, gpio_out_pin, invert);
  69
  70         spin_unlock_irqrestore(&lock, flags);
  71         kfree(wbuf);
  72 @@ -683,5 +685,8 @@ MODULE_PARM_DESC(sense, "Override autodetection of IR receiver circuit"
  73  module_param(softcarrier, bool, S_IRUGO);
  74  MODULE_PARM_DESC(softcarrier, "Software carrier (0 = off, 1 = on, default on)");
  75
  76 +module_param(invert, bool, S_IRUGO);
  77 +MODULE_PARM_DESC(invert, "Invert output (0 = off, 1 = on, default off");
  78 +
  79  module_param(debug, bool, S_IRUGO | S_IWUSR);
  80  MODULE_PARM_DESC(debug, "Enable debugging messages");
  81 --
  82 1.9.1
  83