diff options
| author | Mark A. Greer <mgreer@animalcreek.com> | 2014-03-25 19:54:34 +0400 |
|---|---|---|
| committer | Samuel Ortiz <sameo@linux.intel.com> | 2014-04-22 02:37:27 +0400 |
| commit | a0822a7e3b7333689b1c8cb92782e299791c2795 (patch) | |
| tree | d74bd661f3fffe9b442273bc1caa74dfeefa4248 /drivers/nfc | |
| parent | 49d19cc794e73c3383283a5366ff31572d71a795 (diff) | |
| download | linux-a0822a7e3b7333689b1c8cb92782e299791c2795.tar.xz | |
NFC: trf7970a: Set 'Modulator and SYS_CLK Control' after 'ISO Control'
Writing to the 'ISO Control' register may cause the contents of the
'Modulator and SYS_CLK Control' register to change so be sure to write
to 'Modulator and SYS_CLK Control' after writing to 'ISO Control'.
Note that writing to the 'Modulator and SYS_CLK Control' register
shouldn't be necessary at all according to the trf790a manual but testing
shows that it is necessary.
Signed-off-by: Mark A. Greer <mgreer@animalcreek.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/nfc')
| -rw-r--r-- | drivers/nfc/trf7970a.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/nfc/trf7970a.c b/drivers/nfc/trf7970a.c index d17d424bdcee..90ec2ad35932 100644 --- a/drivers/nfc/trf7970a.c +++ b/drivers/nfc/trf7970a.c @@ -765,11 +765,6 @@ static int trf7970a_init(struct trf7970a *trf) if (ret) goto err_out; - ret = trf7970a_write(trf, TRF7970A_MODULATOR_SYS_CLK_CTRL, - TRF7970A_MODULATOR_DEPTH_OOK); - if (ret) - goto err_out; - ret = trf7970a_write(trf, TRF7970A_ADJUTABLE_FIFO_IRQ_LEVELS, TRF7970A_ADJUTABLE_FIFO_IRQ_LEVELS_WLH_96 | TRF7970A_ADJUTABLE_FIFO_IRQ_LEVELS_WLL_32); @@ -943,6 +938,11 @@ static int trf7970a_config_framing(struct trf7970a *trf, int framing) return ret; trf->iso_ctrl = iso_ctrl; + + ret = trf7970a_write(trf, TRF7970A_MODULATOR_SYS_CLK_CTRL, + TRF7970A_MODULATOR_DEPTH_OOK); + if (ret) + return ret; } return 0; |