From: Benjamin Larsson <benjamin@southpole.se>
Date: Sun, 15 Mar 2015 22:57:53 +0000 (-0300)
Subject: [media] mn88473: check if firmware is already running before loading it
X-Git-Tag: v5.15~14799^2~1131
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=567627bfb2b5837315fe467e52c1bbca634acc00;p=platform%2Fkernel%2Flinux-starfive.git

[media] mn88473: check if firmware is already running before loading it

Signed-off-by: Benjamin Larsson <benjamin@southpole.se>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
---

diff --git a/drivers/staging/media/mn88473/mn88473.c b/drivers/staging/media/mn88473/mn88473.c
index 607ce4d..a23e59e 100644
--- a/drivers/staging/media/mn88473/mn88473.c
+++ b/drivers/staging/media/mn88473/mn88473.c
@@ -196,8 +196,19 @@ static int mn88473_init(struct dvb_frontend *fe)
 
 	dev_dbg(&client->dev, "\n");
 
-	if (dev->warm)
+	/* set cold state by default */
+	dev->warm = false;
+
+	/* check if firmware is already running */
+	ret = regmap_read(dev->regmap[0], 0xf5, &tmp);
+	if (ret)
+		goto err;
+
+	if (!(tmp & 0x1)) {
+		dev_info(&client->dev, "firmware already running\n");
+		dev->warm = true;
 		return 0;
+	}
 
 	/* request the firmware, this will block and timeout */
 	ret = request_firmware(&fw, fw_file, &client->dev);