Commit b887eb09 authored Mar 25, 2014 by Mark A. Greer Committed by Samuel Ortiz Apr 22, 2014

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: Mark A. Greer <mgreer@animalcreek.com>
Signed-off-by: Samuel 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)