git.openwrt.org Git - openwrt/staging/blogic.git/blob

   1 From 7e6c35fe602df6821b3e7db5b1ba656162750fda Mon Sep 17 00:00:00 2001
   2 From: Abhishek Sahu <absahu@codeaurora.org>
   3 Date: Mon, 12 Mar 2018 18:44:55 +0530
   4 Subject: [PATCH 06/13] i2c: qup: fix the transfer length for BAM RX EOT FLUSH
   5  tags
   6
   7 In case of FLUSH operation, BAM copies INPUT EOT FLUSH (0x94)
   8 instead of normal EOT (0x93) tag in input data stream when an
   9 input EOT tag is received during flush operation. So only one tag
  10 will be written instead of 2 separate tags.
  11
  12 Signed-off-by: Abhishek Sahu <absahu@codeaurora.org>
  13 Reviewed-by: Andy Gross <andy.gross@linaro.org>
  14 Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
  15 ---
  16  drivers/i2c/busses/i2c-qup.c | 4 ++--
  17  1 file changed, 2 insertions(+), 2 deletions(-)
  18
  19 --- a/drivers/i2c/busses/i2c-qup.c
  20 +++ b/drivers/i2c/busses/i2c-qup.c
  21 @@ -774,10 +774,10 @@ static int qup_i2c_bam_do_xfer(struct qu
  22                 qup->btx.tag.start[0] = QUP_BAM_INPUT_EOT;
  23                 len++;
  24
  25 -               /* scratch buf to read the BAM EOT and FLUSH tags */
  26 +               /* scratch buf to read the BAM EOT FLUSH tags */
  27                 ret = qup_sg_set_buf(&qup->brx.sg[rx_cnt++],
  28                                      &qup->brx.tag.start[0],
  29 -                                    2, qup, DMA_FROM_DEVICE);
  30 +                                    1, qup, DMA_FROM_DEVICE);
  31                 if (ret)
  32                         return ret;
  33         }