[media] a8293: implement I2C client bindings

Implement I2C client bindings.

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

diff --git a/drivers/media/dvb-frontends/a8293.c b/drivers/media/dvb-frontends/a8293.c
index 780da58..3f0cf9e 100644 (file)
--- a/drivers/media/dvb-frontends/a8293.c
+++ b/drivers/media/dvb-frontends/a8293.c
@@ -22,8 +22,9 @@
 #include "a8293.h"
 
 struct a8293_priv {
+       u8 i2c_addr;
        struct i2c_adapter *i2c;
-       const struct a8293_config *cfg;
+       struct i2c_client *client;
        u8 reg[2];
 };
 
@@ -32,7 +33,7 @@ static int a8293_i2c(struct a8293_priv *priv, u8 *val, int len, bool rd)
        int ret;
        struct i2c_msg msg[1] = {
                {
-                       .addr = priv->cfg->i2c_addr,
+                       .addr = priv->i2c_addr,
                        .len = len,
                        .buf = val,
                }
@@ -128,7 +129,7 @@ struct dvb_frontend *a8293_attach(struct dvb_frontend *fe,
 
        /* setup the priv */
        priv->i2c = i2c;
-       priv->cfg = cfg;
+       priv->i2c_addr = cfg->i2c_addr;
        fe->sec_priv = priv;
 
        /* check if the SEC is there */
@@ -164,6 +165,86 @@ err:
 }
 EXPORT_SYMBOL(a8293_attach);
 
+static int a8293_probe(struct i2c_client *client,
+                       const struct i2c_device_id *id)
+{
+       struct a8293_priv *dev;
+       struct a8293_platform_data *pdata = client->dev.platform_data;
+       struct dvb_frontend *fe = pdata->dvb_frontend;
+       int ret;
+       u8 buf[2];
+
+       dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+       if (!dev) {
+               ret = -ENOMEM;
+               goto err;
+       }
+
+       dev->client = client;
+       dev->i2c = client->adapter;
+       dev->i2c_addr = client->addr;
+
+       /* check if the SEC is there */
+       ret = a8293_rd(dev, buf, 2);
+       if (ret)
+               goto err_kfree;
+
+       /* ENB=0 */
+       dev->reg[0] = 0x10;
+       ret = a8293_wr(dev, &dev->reg[0], 1);
+       if (ret)
+               goto err_kfree;
+
+       /* TMODE=0, TGATE=1 */
+       dev->reg[1] = 0x82;
+       ret = a8293_wr(dev, &dev->reg[1], 1);
+       if (ret)
+               goto err_kfree;
+
+       /* override frontend ops */
+       fe->ops.set_voltage = a8293_set_voltage;
+
+       fe->sec_priv = dev;
+       i2c_set_clientdata(client, dev);
+
+       dev_info(&client->dev, "Allegro A8293 SEC successfully attached\n");
+       return 0;
+err_kfree:
+       kfree(dev);
+err:
+       dev_dbg(&client->dev, "failed=%d\n", ret);
+       return ret;
+}
+
+static int a8293_remove(struct i2c_client *client)
+{
+       struct a8293_dev *dev = i2c_get_clientdata(client);
+
+       dev_dbg(&client->dev, "\n");
+
+       kfree(dev);
+       return 0;
+}
+
+static const struct i2c_device_id a8293_id_table[] = {
+       {"a8293", 0},
+       {}
+};
+MODULE_DEVICE_TABLE(i2c, a8293_id_table);
+
+static struct i2c_driver a8293_driver = {
+       .driver = {
+               .owner  = THIS_MODULE,
+               .name   = "a8293",
+               .suppress_bind_attrs = true,
+       },
+       .probe          = a8293_probe,
+       .remove         = a8293_remove,
+       .id_table       = a8293_id_table,
+};
+
+module_i2c_driver(a8293_driver);
+
 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
 MODULE_DESCRIPTION("Allegro A8293 SEC driver");
 MODULE_LICENSE("GPL");

diff --git a/drivers/media/dvb-frontends/a8293.h b/drivers/media/dvb-frontends/a8293.h
index 5f04119..aff3653 100644 (file)
--- a/drivers/media/dvb-frontends/a8293.h
+++ b/drivers/media/dvb-frontends/a8293.h
@@ -21,8 +21,23 @@
 #ifndef A8293_H
 #define A8293_H
 
+#include "dvb_frontend.h"
 #include <linux/kconfig.h>
 
+/*
+ * I2C address
+ * 0x08, 0x09, 0x0a, 0x0b
+ */
+
+/**
+ * struct a8293_platform_data - Platform data for the a8293 driver
+ * @dvb_frontend: DVB frontend.
+ */
+struct a8293_platform_data {
+       struct dvb_frontend *dvb_frontend;
+};
+
+
 struct a8293_config {
        u8 i2c_addr;
 };