diff options
| author | Mark A. Greer <mgreer@animalcreek.com> | 2014-09-02 15:12:40 -0700 |
|---|---|---|
| committer | Samuel Ortiz <sameo@linux.intel.com> | 2014-09-07 23:13:45 +0200 |
| commit | cfc708dbe4022324bcd2bcb5817dd29f1f91299d (patch) | |
| tree | 79827bcc8eb985213dc70459b0b55c7d7e01bacc /drivers/nfc/trf7970a.c | |
| parent | 307e5caf6fb1dac1b9cfa1d78138d77e46517b56 (diff) | |
NFC: trf7970a: Don't turn off RF if its already off
Don't try to turn off of RF transmitter is its
already off.
Signed-off-by: Mark A. Greer <mgreer@animalcreek.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/nfc/trf7970a.c')
| -rw-r--r-- | drivers/nfc/trf7970a.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/nfc/trf7970a.c b/drivers/nfc/trf7970a.c index e4671e54424a..429146b7e6d8 100644 --- a/drivers/nfc/trf7970a.c +++ b/drivers/nfc/trf7970a.c @@ -859,6 +859,10 @@ err_out: static void trf7970a_switch_rf_off(struct trf7970a *trf) { + if ((trf->state == TRF7970A_ST_PWR_OFF) || + (trf->state == TRF7970A_ST_RF_OFF)) + return; + dev_dbg(trf->dev, "Switching rf off\n"); trf->chip_status_ctrl &= ~TRF7970A_CHIP_STATUS_RF_ON; |