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authorGeoff Lansberry <geoff@kuvee.com>2016-04-18 15:48:39 -0400
committerSamuel Ortiz <sameo@linux.intel.com>2016-07-04 12:20:21 +0200
commit58d46f538b602d4a93fbae945e5c844a90c01f14 (patch)
treec20dba019040c1aea48544dbb7d9f11a40eba925 /drivers/nfc
parentfa1ce54ea38f7f83473fce62e64fefbd7ebd170e (diff)
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>
Diffstat (limited to 'drivers/nfc')
-rw-r--r--drivers/nfc/trf7970a.c4
1 files changed, 4 insertions, 0 deletions
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;