[media] fc2580: implement I2C client bindings

Add I2C client bindings to driver.

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

3 files changed, 110 insertions, 10 deletions

diff --git a/drivers/media/tuners/fc2580.c b/drivers/media/tuners/fc2580.c
index f0c9c42867de..d01fba8df3c0 100644
--- a/drivers/media/tuners/fc2580.c
+++ b/drivers/media/tuners/fc2580.c
@@ -47,7 +47,7 @@ static int fc2580_wr_regs(struct fc2580_priv *priv, u8 reg, u8 *val, int len)
         u8 buf[MAX_XFER_SIZE];
         struct i2c_msg msg[1] = {
                 {
-                        .addr = priv->cfg->i2c_addr,
+                        .addr = priv->i2c_addr,
                         .flags = 0,
                         .len = 1 + len,
                         .buf = buf,
@@ -82,12 +82,12 @@ static int fc2580_rd_regs(struct fc2580_priv *priv, u8 reg, u8 *val, int len)
         u8 buf[MAX_XFER_SIZE];
         struct i2c_msg msg[2] = {
                 {
-                        .addr = priv->cfg->i2c_addr,
+                        .addr = priv->i2c_addr,
                         .flags = 0,
                         .len = 1,
                         .buf = &reg,
                 }, {
-                        .addr = priv->cfg->i2c_addr,
+                        .addr = priv->i2c_addr,
                         .flags = I2C_M_RD,
                         .len = len,
                         .buf = buf,
@@ -182,10 +182,10 @@ static int fc2580_set_params(struct dvb_frontend *fe)
         if (ret < 0)
                 goto err;
 
-        if (f_vco >= 2UL * 76 * priv->cfg->clock) {
+        if (f_vco >= 2UL * 76 * priv->clk) {
                 r_val = 1;
                 r18_val = 0x00;
-        } else if (f_vco >= 1UL * 76 * priv->cfg->clock) {
+        } else if (f_vco >= 1UL * 76 * priv->clk) {
                 r_val = 2;
                 r18_val = 0x10;
         } else {
@@ -193,7 +193,7 @@ static int fc2580_set_params(struct dvb_frontend *fe)
                 r18_val = 0x20;
         }
 
-        f_ref = 2UL * priv->cfg->clock / r_val;
+        f_ref = 2UL * priv->clk / r_val;
         n_val = div_u64_rem(f_vco, f_ref, &k_val);
         k_val_reg = div_u64(1ULL * k_val * (1 << 20), f_ref);
 
@@ -213,7 +213,7 @@ static int fc2580_set_params(struct dvb_frontend *fe)
         if (ret < 0)
                 goto err;
 
-        if (priv->cfg->clock >= 28000000) {
+        if (priv->clk >= 28000000) {
                 ret = fc2580_wr_reg(priv, 0x4b, 0x22);
                 if (ret < 0)
                         goto err;
@@ -348,7 +348,7 @@ static int fc2580_set_params(struct dvb_frontend *fe)
         if (ret < 0)
                 goto err;
 
-        ret = fc2580_wr_reg(priv, 0x37, div_u64(1ULL * priv->cfg->clock *
+        ret = fc2580_wr_reg(priv, 0x37, div_u64(1ULL * priv->clk *
                         fc2580_if_filter_lut[i].mul, 1000000000));
         if (ret < 0)
                 goto err;
@@ -510,8 +510,9 @@ struct dvb_frontend *fc2580_attach(struct dvb_frontend *fe,
                 goto err;
         }
 
-        priv->cfg = cfg;
+        priv->clk = cfg->clock;
         priv->i2c = i2c;
+        priv->i2c_addr = cfg->i2c_addr;
 
         /* check if the tuner is there */
         ret = fc2580_rd_reg(priv, 0x01, &chip_id);
@@ -550,6 +551,88 @@ err:
 }
 EXPORT_SYMBOL(fc2580_attach);
 
+static int fc2580_probe(struct i2c_client *client,
+                        const struct i2c_device_id *id)
+{
+        struct fc2580_priv *dev;
+        struct fc2580_platform_data *pdata = client->dev.platform_data;
+        struct dvb_frontend *fe = pdata->dvb_frontend;
+        int ret;
+        u8 chip_id;
+
+        dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+        if (!dev) {
+                ret = -ENOMEM;
+                goto err;
+        }
+
+        if (pdata->clk)
+                dev->clk = pdata->clk;
+        else
+                dev->clk = 16384000; /* internal clock */
+        dev->client = client;
+        dev->i2c = client->adapter;
+        dev->i2c_addr = client->addr;
+
+        /* check if the tuner is there */
+        ret = fc2580_rd_reg(dev, 0x01, &chip_id);
+        if (ret < 0)
+                goto err_kfree;
+
+        dev_dbg(&client->dev, "chip_id=%02x\n", chip_id);
+
+        switch (chip_id) {
+        case 0x56:
+        case 0x5a:
+                break;
+        default:
+                goto err_kfree;
+        }
+
+        fe->tuner_priv = dev;
+        memcpy(&fe->ops.tuner_ops, &fc2580_tuner_ops,
+                        sizeof(struct dvb_tuner_ops));
+        fe->ops.tuner_ops.release = NULL;
+        i2c_set_clientdata(client, dev);
+
+        dev_info(&client->dev, "FCI FC2580 successfully identified\n");
+        return 0;
+err_kfree:
+        kfree(dev);
+err:
+        dev_dbg(&client->dev, "failed=%d\n", ret);
+        return ret;
+}
+
+static int fc2580_remove(struct i2c_client *client)
+{
+        struct fc2580_priv *dev = i2c_get_clientdata(client);
+
+        dev_dbg(&client->dev, "\n");
+
+        kfree(dev);
+        return 0;
+}
+
+static const struct i2c_device_id fc2580_id_table[] = {
+        {"fc2580", 0},
+        {}
+};
+MODULE_DEVICE_TABLE(i2c, fc2580_id_table);
+
+static struct i2c_driver fc2580_driver = {
+        .driver = {
+                .owner  = THIS_MODULE,
+                .name   = "fc2580",
+                .suppress_bind_attrs = true,
+        },
+        .probe          = fc2580_probe,
+        .remove         = fc2580_remove,
+        .id_table       = fc2580_id_table,
+};
+
+module_i2c_driver(fc2580_driver);
+
 MODULE_DESCRIPTION("FCI FC2580 silicon tuner driver");
 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
 MODULE_LICENSE("GPL");
diff --git a/drivers/media/tuners/fc2580.h b/drivers/media/tuners/fc2580.h
index b1ce6770f88e..5679e44980f9 100644
--- a/drivers/media/tuners/fc2580.h
+++ b/drivers/media/tuners/fc2580.h
@@ -24,6 +24,21 @@
 #include <linux/kconfig.h>
 #include "dvb_frontend.h"
 
+/*
+ * I2C address
+ * 0x56, ...
+ */
+
+/**
+ * struct fc2580_platform_data - Platform data for the fc2580 driver
+ * @clk: Clock frequency (0 = internal clock).
+ * @dvb_frontend: DVB frontend.
+ */
+struct fc2580_platform_data {
+        u32 clk;
+        struct dvb_frontend *dvb_frontend;
+};
+
 struct fc2580_config {
         /*
          * I2C address
diff --git a/drivers/media/tuners/fc2580_priv.h b/drivers/media/tuners/fc2580_priv.h
index 646c99452136..a22ffc63749f 100644
--- a/drivers/media/tuners/fc2580_priv.h
+++ b/drivers/media/tuners/fc2580_priv.h
@@ -128,8 +128,10 @@ static const struct fc2580_freq_regs fc2580_freq_regs_lut[] = {
 };
 
 struct fc2580_priv {
-        const struct fc2580_config *cfg;
+        u32 clk;
+        struct i2c_client *client;
         struct i2c_adapter *i2c;
+        u8 i2c_addr;
 };
 
 #endif