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

   1 From f1f13a6b3798161ccc3852320bd2184b85c9209b 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 051/174] 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 --- a/drivers/staging/media/lirc/lirc_rpi.c
  11 +++ b/drivers/staging/media/lirc/lirc_rpi.c
  12 @@ -68,6 +68,8 @@ static int debug;
  13  static int sense = -1;
  14  /* use softcarrier by default */
  15  static int softcarrier = 1;
  16 +/* 0 = do not invert output, 1 = invert output */
  17 +static int invert = 0;
  18
  19  struct gpio_chip *gpiochip;
  20  struct irq_chip *irqchip;
  21 @@ -135,10 +137,10 @@ static long send_pulse_softcarrier(unsig
  22         actual = 0; target = 0; flag = 0;
  23         while (actual < length) {
  24                 if (flag) {
  25 -                       gpiochip->set(gpiochip, gpio_out_pin, 0);
  26 +                       gpiochip->set(gpiochip, gpio_out_pin, invert);
  27                         target += space_width;
  28                 } else {
  29 -                       gpiochip->set(gpiochip, gpio_out_pin, 1);
  30 +                       gpiochip->set(gpiochip, gpio_out_pin, !invert);
  31                         target += pulse_width;
  32                 }
  33                 d = (target - actual -
  34 @@ -162,7 +164,7 @@ static long send_pulse(unsigned long len
  35         if (softcarrier) {
  36                 return send_pulse_softcarrier(length);
  37         } else {
  38 -               gpiochip->set(gpiochip, gpio_out_pin, 1);
  39 +               gpiochip->set(gpiochip, gpio_out_pin, !invert);
  40                 safe_udelay(length);
  41                 return 0;
  42         }
  43 @@ -170,7 +172,7 @@ static long send_pulse(unsigned long len
  44
  45  static void send_space(long length)
  46  {
  47 -       gpiochip->set(gpiochip, gpio_out_pin, 0);
  48 +       gpiochip->set(gpiochip, gpio_out_pin, invert);
  49         if (length <= 0)
  50                 return;
  51         safe_udelay(length);
  52 @@ -318,7 +320,7 @@ static int init_port(void)
  53
  54         gpiochip->direction_input(gpiochip, gpio_in_pin);
  55         gpiochip->direction_output(gpiochip, gpio_out_pin, 1);
  56 -       gpiochip->set(gpiochip, gpio_out_pin, 0);
  57 +       gpiochip->set(gpiochip, gpio_out_pin, invert);
  58
  59         irq = gpiochip->to_irq(gpiochip, gpio_in_pin);
  60         dprintk("to_irq %d\n", irq);
  61 @@ -457,7 +459,7 @@ static ssize_t lirc_write(struct file *f
  62                 else
  63                         delta = send_pulse(wbuf[i]);
  64         }
  65 -       gpiochip->set(gpiochip, gpio_out_pin, 0);
  66 +       gpiochip->set(gpiochip, gpio_out_pin, invert);
  67
  68         spin_unlock_irqrestore(&lock, flags);
  69         kfree(wbuf);
  70 @@ -683,5 +685,8 @@ MODULE_PARM_DESC(sense, "Override autode
  71  module_param(softcarrier, bool, S_IRUGO);
  72  MODULE_PARM_DESC(softcarrier, "Software carrier (0 = off, 1 = on, default on)");
  73
  74 +module_param(invert, bool, S_IRUGO);
  75 +MODULE_PARM_DESC(invert, "Invert output (0 = off, 1 = on, default off");
  76 +
  77  module_param(debug, bool, S_IRUGO | S_IWUSR);
  78  MODULE_PARM_DESC(debug, "Enable debugging messages");