NFC: trf7970a: trf7970a_init() turns off the RF transmitter

When trf7970a_init() initializes the trf7970a it
implicitly turns off the RF transmitter.  Track
this by clearing the TRF7970A_CHIP_STATUS_RF_ON
bit in the cached trf->chip_status_ctrl.

Signed-off-by: Mark A. Greer <mgreer@animalcreek.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

diff --git a/drivers/nfc/trf7970a.c b/drivers/nfc/trf7970a.c
index 429146b7e6d8aa7817418ab7a836203cb4e4c67d..ab6e276be6a6535a6de877c0a72e2847cd3d56ee 100644 (file)
--- a/drivers/nfc/trf7970a.c
+++ b/drivers/nfc/trf7970a.c
@@ -826,6 +826,8 @@ static int trf7970a_init(struct trf7970a *trf)
 
        usleep_range(1000, 2000);
 
+       trf->chip_status_ctrl &= ~TRF7970A_CHIP_STATUS_RF_ON;
+
        ret = trf7970a_write(trf, TRF7970A_MODULATOR_SYS_CLK_CTRL, 0);
        if (ret)
                goto err_out;