From: Mark A. Greer <mgreer@animalcreek.com>
Date: Tue, 2 Sep 2014 22:12:23 +0000 (-0700)
Subject: NFC: trf7970a: Initialize when enabling RF
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=a08e54549e743ea3704da939f92caf3eaa8471d3;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

NFC: trf7970a: Initialize when enabling RF

Currently, the trf7970a is reset & initialized only
when the pm_runtime resume hook is called.  Instead,
initialize it every time the RF is enabled to ensure
that the trf7970a is quiesced and in a known state
before being set up for another RF technology.

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

diff --git a/drivers/nfc/trf7970a.c b/drivers/nfc/trf7970a.c
index 9c0549d4f276..ce9686c44350 100644
--- a/drivers/nfc/trf7970a.c
+++ b/drivers/nfc/trf7970a.c
@@ -823,10 +823,18 @@ static void trf7970a_switch_rf_off(struct trf7970a *trf)
 
 static void trf7970a_switch_rf_on(struct trf7970a *trf)
 {
+	int ret;
+
 	dev_dbg(trf->dev, "Switching rf on\n");
 
 	pm_runtime_get_sync(trf->dev);
 
+	ret = trf7970a_init(trf);
+	if (ret) {
+		dev_err(trf->dev, "%s - Can't initialize: %d\n", __func__, ret);
+		return;
+	}
+
 	trf->state = TRF7970A_ST_IDLE;
 }
 
@@ -1473,12 +1481,6 @@ static int trf7970a_pm_runtime_resume(struct device *dev)
 
 	usleep_range(20000, 21000);
 
-	ret = trf7970a_init(trf);
-	if (ret) {
-		dev_err(dev, "%s - Can't initialize: %d\n", __func__, ret);
-		return ret;
-	}
-
 	pm_runtime_mark_last_busy(dev);
 
 	return 0;