Commit b887eb09 authored by Mark A. Greer's avatar Mark A. Greer Committed by Samuel Ortiz
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NFC: trf7970a: Clear 'NFC Target Detection Level' register 



Due to a trf7970a erratum, the 'NFC Target Detection Level' register
(0x18) must be cleared after power-up.

Signed-off-by: default avatarMark A. Greer <mgreer@animalcreek.com>
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
parent 5876bc75

drivers/nfc/trf7970a.c

+5 −0
Original line number Diff line number Diff line
@@ -757,6 +757,11 @@ static int trf7970a_init(struct trf7970a *trf) 
	if (ret)

		goto err_out;



	/* Must clear NFC Target Detection Level reg due to erratum */

	ret = trf7970a_write(trf, TRF7970A_NFC_TARGET_LEVEL, 0);

	if (ret)

		goto err_out;



	ret = trf7970a_write(trf, TRF7970A_MODULATOR_SYS_CLK_CTRL,

			TRF7970A_MODULATOR_DEPTH_OOK);

	if (ret)