From: Geoff Lansberry <geoff@kuvee.com>
Date: Mon, 18 Apr 2016 19:48:39 +0000 (-0400)
Subject: NFC: trf7970a: add TI recommended write of zero to Register 0x18
X-Git-Tag: v4.8-rc1~140^2~48^2~26
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=58d46f538b602d4a93fbae945e5c844a90c01f14;p=karo-tx-linux.git

NFC: trf7970a: add TI recommended write of zero to Register 0x18

Signed-off-by: Geoff Lansberry <geoff@kuvee.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
---

diff --git a/drivers/nfc/trf7970a.c b/drivers/nfc/trf7970a.c
index 10842b7051b3..26c9dbbccb0c 100644
--- a/drivers/nfc/trf7970a.c
+++ b/drivers/nfc/trf7970a.c
@@ -1048,6 +1048,10 @@ static int trf7970a_init(struct trf7970a *trf)
 	if (ret)
 		goto err_out;
 
+	ret = trf7970a_write(trf, TRF7970A_NFC_TARGET_LEVEL, 0);
+	if (ret)
+		goto err_out;
+
 	usleep_range(1000, 2000);
 
 	trf->chip_status_ctrl &= ~TRF7970A_CHIP_STATUS_RF_ON;