From 0f21ac7f92e8a014a3c653337fbae7af4c240c3a Mon Sep 17 00:00:00 2001 From: Benjamin Larsson Date: Sun, 15 Mar 2015 19:57:52 -0300 Subject: [PATCH] [media] mn88473: implement firmware parity check Signed-off-by: Benjamin Larsson Signed-off-by: Antti Palosaari Signed-off-by: Mauro Carvalho Chehab --- drivers/staging/media/mn88473/mn88473.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/staging/media/mn88473/mn88473.c b/drivers/staging/media/mn88473/mn88473.c index 84bd4fa3c627..607ce4d3b12f 100644 --- a/drivers/staging/media/mn88473/mn88473.c +++ b/drivers/staging/media/mn88473/mn88473.c @@ -192,6 +192,7 @@ static int mn88473_init(struct dvb_frontend *fe) int ret, len, remaining; const struct firmware *fw = NULL; u8 *fw_file = MN88473_FIRMWARE; + unsigned int tmp; dev_dbg(&client->dev, "\n"); @@ -227,6 +228,20 @@ static int mn88473_init(struct dvb_frontend *fe) } } + /* parity check of firmware */ + ret = regmap_read(dev->regmap[0], 0xf8, &tmp); + if (ret) { + dev_err(&client->dev, + "parity reg read failed=%d\n", ret); + goto err; + } + if (tmp & 0x10) { + dev_err(&client->dev, + "firmware parity check failed=0x%x\n", tmp); + goto err; + } + dev_err(&client->dev, "firmware parity check succeeded=0x%x\n", tmp); + ret = regmap_write(dev->regmap[0], 0xf5, 0x00); if (ret) goto err;