linux-kernel - [PATCH 3.16 319/357] media: it913x: init tuner on attach

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Message-Id: <20141003212943.051546098@linuxfoundation.org>
Date:	Fri,  3 Oct 2014 14:31:45 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Bimow Chen <Bimow.Chen@....com.tw>,
	Antti Palosaari <crope@....fi>,
	Mauro Carvalho Chehab <m.chehab@...sung.com>
Subject: [PATCH 3.16 319/357] media: it913x: init tuner on attach

3.16-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Bimow Chen <Bimow.Chen@....com.tw>

commit 01b461bbe74b89da8941f4c95711777d87b9172e upstream.

That register is needed to program very first in order to operate
correctly.

[crope@....fi: returned sequence back, removed sleep, moved reg
write earlier to prevent populating tuner ops in case of failure]

Signed-off-by: Bimow Chen <Bimow.Chen@....com.tw>
Signed-off-by: Antti Palosaari <crope@....fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@...sung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/media/tuners/tuner_it913x.c |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/drivers/media/tuners/tuner_it913x.c
+++ b/drivers/media/tuners/tuner_it913x.c
@@ -396,6 +396,7 @@ struct dvb_frontend *it913x_attach(struc
 		struct i2c_adapter *i2c_adap, u8 i2c_addr, u8 config)
 {
 	struct it913x_state *state = NULL;
+	int ret;
 
 	/* allocate memory for the internal state */
 	state = kzalloc(sizeof(struct it913x_state), GFP_KERNEL);
@@ -425,6 +426,11 @@ struct dvb_frontend *it913x_attach(struc
 	state->tuner_type = config;
 	state->firmware_ver = 1;
 
+	/* tuner RF initial */
+	ret = it913x_wr_reg(state, PRO_DMOD, 0xec4c, 0x68);
+	if (ret < 0)
+		goto error;
+
 	fe->tuner_priv = state;
 	memcpy(&fe->ops.tuner_ops, &it913x_tuner_ops,
 			sizeof(struct dvb_tuner_ops));


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