target/linux/s3c24xx/patches-2.6.24/1150-Explain-why-we-want-SECOND-to-kick.patch

   1 From 88d3c5010a207c651d1940856d0d26935434e3c2 Mon Sep 17 00:00:00 2001
   2 From: Holger Freyther <ich@tamarin.(none)>
   3 Date: Tue, 13 May 2008 18:53:40 +0100
   4 Subject: [PATCH] Explain why we want SECOND to kick.
   5      We do not mask the SECOND interrupt to make sure that we get
   6      a interrupt at the beginning. We use this for the coldplug_done
   7      initisalisation.
   8      So pcf->flags and INT1M is out of sync at the beginning but after the
   9      first SECOND interrupt it will be put into sync.
  10
  11 Signed-Off-By: Holger Freyther <zecke@openmoko.org>
  12 ---
  13  drivers/i2c/chips/pcf50633.c |    3 ++-
  14  1 files changed, 2 insertions(+), 1 deletions(-)
  15
  16 diff --git a/drivers/i2c/chips/pcf50633.c b/drivers/i2c/chips/pcf50633.c
  17 index 205f4e3..1c10c42 100644
  18 --- a/drivers/i2c/chips/pcf50633.c
  19 +++ b/drivers/i2c/chips/pcf50633.c
  20 @@ -1755,7 +1755,8 @@ static int pcf50633_detect(struct i2c_adapter *adapter, int address, int kind)
  21                 goto exit_sysfs;
  22
  23         /* configure interrupt mask */
  24 -       reg_write(data, PCF50633_REG_INT1M, 0x00); /* we want SECOND to kick */
  25 +       /* we want SECOND to kick for the coldplug initialisation */
  26 +       reg_write(data, PCF50633_REG_INT1M, 0x00);
  27         reg_write(data, PCF50633_REG_INT2M, 0x00);
  28         reg_write(data, PCF50633_REG_INT3M, 0x00);
  29         reg_write(data, PCF50633_REG_INT4M, 0x00);
  30 --
  31 1.5.6.5
  32