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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>
hifive-unleashed-5.1
Mark A. Greer 2014-09-02 15:12:41 -07:00 committed by Samuel Ortiz
parent cfc708dbe4
commit 7149d6bfec
1 changed files with 2 additions and 0 deletions
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2
drivers/nfc/trf7970a.c
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@ -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;