target/linux/brcm2708/patches-4.1/0093-i2c-bcm2708-Increase-timeouts-to-allow-larger-transf.patch

   1 From 625b5c018f512e17512df16f57b6393b771f4996 Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.org>
   3 Date: Tue, 30 Jun 2015 10:28:59 +0100
   4 Subject: [PATCH 093/222] i2c-bcm2708: Increase timeouts to allow larger
   5  transfers
   6
   7 Use the timeout value provided by the I2C_TIMEOUT ioctl when waiting
   8 for completion. The default timeout is 1 second.
   9
  10 See: https://github.com/raspberrypi/linux/issues/260
  11 ---
  12  drivers/i2c/busses/i2c-bcm2708.c | 7 +++----
  13  1 file changed, 3 insertions(+), 4 deletions(-)
  14
  15 --- a/drivers/i2c/busses/i2c-bcm2708.c
  16 +++ b/drivers/i2c/busses/i2c-bcm2708.c
  17 @@ -67,10 +67,9 @@
  18  #define BSC_S_DONE             0x00000002
  19  #define BSC_S_TA               0x00000001
  20
  21 -#define I2C_TIMEOUT_MS 150
  22 -#define I2C_WAIT_LOOP_COUNT 40
  23 +#define I2C_WAIT_LOOP_COUNT    200
  24
  25 -#define DRV_NAME       "bcm2708_i2c"
  26 +#define DRV_NAME               "bcm2708_i2c"
  27
  28  static unsigned int baudrate = CONFIG_I2C_BCM2708_BAUDRATE;
  29  module_param(baudrate, uint, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
  30 @@ -305,7 +304,7 @@ static int bcm2708_i2c_master_xfer(struc
  31                 goto error_timeout;
  32         }
  33
  34 -       ret = wait_for_completion_timeout(&bi->done, msecs_to_jiffies(I2C_TIMEOUT_MS));
  35 +       ret = wait_for_completion_timeout(&bi->done, adap->timeout);
  36         if (ret == 0) {
  37                 dev_err(&adap->dev, "transfer timed out\n");
  38                 goto error_timeout;