Commit 6c08df42 authored Sep 02, 2014 by Mark A. Greer Committed by Samuel Ortiz Sep 07, 2014

NFC: trf7970a: Disable SYS_CLK Output



Currently, support for providing the external
SYS_CLK signal on pin 27 is not supported so
turn it off by writing to the 'Modulator and
SYS_CLK Control' register immediately after
reset.

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

parent 17b21517

drivers/nfc/trf7970a.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -775,6 +775,12 @@ static int trf7970a_init(struct trf7970a *trf)
		if (ret)
		goto err_out;

		ret = trf7970a_write(trf, TRF7970A_MODULATOR_SYS_CLK_CTRL, 0);
		if (ret)
		goto err_out;

		trf->modulator_sys_clk_ctrl = 0;

		/* Must clear NFC Target Detection Level reg due to erratum */
		ret = trf7970a_write(trf, TRF7970A_NFC_TARGET_LEVEL, 0);
		if (ret)