From 5974150dead6da1db415f04a232f79b922f412a0 Mon Sep 17 00:00:00 2001
From: "Mark A. Greer" <mgreer@animalcreek.com>
Date: Tue, 2 Sep 2014 15:12:27 -0700
Subject: [PATCH] NFC: trf7970a: Remove unnecessary FIFO reset & RSSI read
It is no longer necessary to reset the FIFO and
read the 'RSSI Levels and Oscillator Status Register'
so remove that code.
Signed-off-by: Mark A. Greer <mgreer@animalcreek.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
---
drivers/nfc/trf7970a.c | 9 ---------
1 file changed, 9 deletions(-)
diff --git a/drivers/nfc/trf7970a.c b/drivers/nfc/trf7970a.c
index e7f22a44dc529..c6216c1cc4b97 100644
--- a/drivers/nfc/trf7970a.c
+++ b/drivers/nfc/trf7970a.c
@@ -478,8 +478,6 @@ static int trf7970a_read_irqstatus(struct trf7970a *trf, u8 *status)
static void trf7970a_send_upstream(struct trf7970a *trf)
{
- u8 rssi;
-
dev_kfree_skb_any(trf->tx_skb);
trf->tx_skb = NULL;
@@ -488,13 +486,6 @@ static void trf7970a_send_upstream(struct trf7970a *trf)
16, 1, trf->rx_skb->data, trf->rx_skb->len,
false);
- /* According to the manual it is "good form" to reset the fifo and
- * read the RSSI levels & oscillator status register here. It doesn't
- * explain why.
- */
- trf7970a_cmd(trf, TRF7970A_CMD_FIFO_RESET);
- trf7970a_read(trf, TRF7970A_RSSI_OSC_STATUS, &rssi);
-
trf->state = TRF7970A_ST_IDLE;
if (trf->aborting) {
--
2.39.5