V4L/DVB (3337): Drivers/media/dvb/frontends/mt312.c: cleanups

This patch contains the following possible cleanups:
- update the Kconfig help to mention the VP310
- merge vp310_attach and mt312_attach into a new vp310_mt312_attach
  to remove some code duplication

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 44 insertions, 72 deletions

diff --git a/drivers/media/dvb/frontends/mt312.c b/drivers/media/dvb/frontends/mt312.c
index ec4e641acc64..d3aea83cf218 100644
--- a/drivers/media/dvb/frontends/mt312.c
+++ b/drivers/media/dvb/frontends/mt312.c
@@ -612,76 +612,6 @@ static void mt312_release(struct dvb_frontend* fe)
         kfree(state);
 }
 
-static struct dvb_frontend_ops vp310_mt312_ops;
-
-struct dvb_frontend* vp310_attach(const struct mt312_config* config,
-                                  struct i2c_adapter* i2c)
-{
-        struct mt312_state* state = NULL;
-
-        /* allocate memory for the internal state */
-        state = kmalloc(sizeof(struct mt312_state), GFP_KERNEL);
-        if (state == NULL)
-                goto error;
-
-        /* setup the state */
-        state->config = config;
-        state->i2c = i2c;
-        memcpy(&state->ops, &vp310_mt312_ops, sizeof(struct dvb_frontend_ops));
-        strcpy(state->ops.info.name, "Zarlink VP310 DVB-S");
-
-        /* check if the demod is there */
-        if (mt312_readreg(state, ID, &state->id) < 0)
-                goto error;
-        if (state->id != ID_VP310) {
-                goto error;
-        }
-
-        /* create dvb_frontend */
-        state->frequency = 90;
-        state->frontend.ops = &state->ops;
-        state->frontend.demodulator_priv = state;
-        return &state->frontend;
-
-error:
-        kfree(state);
-        return NULL;
-}
-
-struct dvb_frontend* mt312_attach(const struct mt312_config* config,
-                                  struct i2c_adapter* i2c)
-{
-        struct mt312_state* state = NULL;
-
-        /* allocate memory for the internal state */
-        state = kmalloc(sizeof(struct mt312_state), GFP_KERNEL);
-        if (state == NULL)
-                goto error;
-
-        /* setup the state */
-        state->config = config;
-        state->i2c = i2c;
-        memcpy(&state->ops, &vp310_mt312_ops, sizeof(struct dvb_frontend_ops));
-        strcpy(state->ops.info.name, "Zarlink MT312 DVB-S");
-
-        /* check if the demod is there */
-        if (mt312_readreg(state, ID, &state->id) < 0)
-                goto error;
-        if (state->id != ID_MT312) {
-                goto error;
-        }
-
-        /* create dvb_frontend */
-        state->frequency = 60;
-        state->frontend.ops = &state->ops;
-        state->frontend.demodulator_priv = state;
-        return &state->frontend;
-
-error:
-        kfree(state);
-        return NULL;
-}
-
 static struct dvb_frontend_ops vp310_mt312_ops = {
 
         .info = {
@@ -720,6 +650,49 @@ static struct dvb_frontend_ops vp310_mt312_ops = {
         .set_voltage = mt312_set_voltage,
 };
 
+struct dvb_frontend* vp310_mt312_attach(const struct mt312_config* config,
+                                        struct i2c_adapter* i2c)
+{
+        struct mt312_state* state = NULL;
+
+        /* allocate memory for the internal state */
+        state = kmalloc(sizeof(struct mt312_state), GFP_KERNEL);
+        if (state == NULL)
+                goto error;
+
+        /* setup the state */
+        state->config = config;
+        state->i2c = i2c;
+        memcpy(&state->ops, &vp310_mt312_ops, sizeof(struct dvb_frontend_ops));
+
+        /* check if the demod is there */
+        if (mt312_readreg(state, ID, &state->id) < 0)
+                goto error;
+
+        switch (state->id) {
+        case ID_VP310:
+                strcpy(state->ops.info.name, "Zarlink VP310 DVB-S");
+                state->frequency = 90;
+                break;
+        case ID_MT312:
+                strcpy(state->ops.info.name, "Zarlink MT312 DVB-S");
+                state->frequency = 60;
+                break;
+        default:
+                printk (KERN_WARNING "Only Zarlink VP310/MT312 are supported chips.\n");
+                goto error;
+        }
+
+        /* create dvb_frontend */
+        state->frontend.ops = &state->ops;
+        state->frontend.demodulator_priv = state;
+        return &state->frontend;
+
+error:
+        kfree(state);
+        return NULL;
+}
+
 module_param(debug, int, 0644);
 MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
 
@@ -727,5 +700,4 @@ MODULE_DESCRIPTION("Zarlink VP310/MT312 DVB-S Demodulator driver");
 MODULE_AUTHOR("Andreas Oberritter <obi@linuxtv.org>");
 MODULE_LICENSE("GPL");
 
-EXPORT_SYMBOL(mt312_attach);
-EXPORT_SYMBOL(vp310_attach);
+EXPORT_SYMBOL(vp310_mt312_attach);