drivers/media/tuners/e4000.c

root/drivers/media/tuners/e4000.c
// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Elonics E4000 silicon tuner driver
 *
 * Copyright (C) 2012 Antti Palosaari <crope@iki.fi>
 */

#include "e4000_priv.h"

static int e4000_init(struct e4000_dev *dev)
{
        struct i2c_client *client = dev->client;
        int ret;

        dev_dbg(&client->dev, "\n");

        /* reset */
        ret = regmap_write(dev->regmap, 0x00, 0x01);
        if (ret)
                goto err;

        /* disable output clock */
        ret = regmap_write(dev->regmap, 0x06, 0x00);
        if (ret)
                goto err;

        ret = regmap_write(dev->regmap, 0x7a, 0x96);
        if (ret)
                goto err;

        /* configure gains */
        ret = regmap_bulk_write(dev->regmap, 0x7e, "\x01\xfe", 2);
        if (ret)
                goto err;

        ret = regmap_write(dev->regmap, 0x82, 0x00);
        if (ret)
                goto err;

        ret = regmap_write(dev->regmap, 0x24, 0x05);
        if (ret)
                goto err;

        ret = regmap_bulk_write(dev->regmap, 0x87, "\x20\x01", 2);
        if (ret)
                goto err;

        ret = regmap_bulk_write(dev->regmap, 0x9f, "\x7f\x07", 2);
        if (ret)
                goto err;

        /* DC offset control */
        ret = regmap_write(dev->regmap, 0x2d, 0x1f);
        if (ret)
                goto err;

        ret = regmap_bulk_write(dev->regmap, 0x70, "\x01\x01", 2);
        if (ret)
                goto err;

        /* gain control */
        ret = regmap_write(dev->regmap, 0x1a, 0x17);
        if (ret)
                goto err;

        ret = regmap_write(dev->regmap, 0x1f, 0x1a);
        if (ret)
                goto err;

        dev->active = true;

        return 0;
err:
        dev_dbg(&client->dev, "failed=%d\n", ret);
        return ret;
}

static int e4000_sleep(struct e4000_dev *dev)
{
        struct i2c_client *client = dev->client;
        int ret;

        dev_dbg(&client->dev, "\n");

        dev->active = false;

        ret = regmap_write(dev->regmap, 0x00, 0x00);
        if (ret)
                goto err;

        return 0;
err:
        dev_dbg(&client->dev, "failed=%d\n", ret);
        return ret;
}

static int e4000_set_params(struct e4000_dev *dev)
{
        struct i2c_client *client = dev->client;
        int ret, i;
        unsigned int div_n, k, k_cw, div_out;
        u64 f_vco;
        u8 buf[5], i_data[4], q_data[4];

        if (!dev->active) {
                dev_dbg(&client->dev, "tuner is sleeping\n");
                return 0;
        }

        /* gain control manual */
        ret = regmap_write(dev->regmap, 0x1a, 0x00);
        if (ret)
                goto err;

        /*
         * Fractional-N synthesizer
         *
         *           +----------------------------+
         *           v                            |
         *  Fref   +----+     +-------+         +------+     +---+
         * ------> | PD | --> |  VCO  | ------> | /N.F | <-- | K |
         *         +----+     +-------+         +------+     +---+
         *                      |
         *                      |
         *                      v
         *                    +-------+  Fout
         *                    | /Rout | ------>
         *                    +-------+
         */
        for (i = 0; i < ARRAY_SIZE(e4000_pll_lut); i++) {
                if (dev->f_frequency <= e4000_pll_lut[i].freq)
                        break;
        }
        if (i == ARRAY_SIZE(e4000_pll_lut)) {
                ret = -EINVAL;
                goto err;
        }

        #define F_REF dev->clk
        div_out = e4000_pll_lut[i].div_out;
        f_vco = (u64) dev->f_frequency * div_out;
        /* calculate PLL integer and fractional control word */
        div_n = div_u64_rem(f_vco, F_REF, &k);
        k_cw = div_u64((u64) k * 0x10000, F_REF);

        dev_dbg(&client->dev,
                "frequency=%u bandwidth=%u f_vco=%llu F_REF=%u div_n=%u k=%u k_cw=%04x div_out=%u\n",
                dev->f_frequency, dev->f_bandwidth, f_vco, F_REF, div_n, k,
                k_cw, div_out);

        buf[0] = div_n;
        buf[1] = (k_cw >> 0) & 0xff;
        buf[2] = (k_cw >> 8) & 0xff;
        buf[3] = 0x00;
        buf[4] = e4000_pll_lut[i].div_out_reg;
        ret = regmap_bulk_write(dev->regmap, 0x09, buf, 5);
        if (ret)
                goto err;

        /* LNA filter (RF filter) */
        for (i = 0; i < ARRAY_SIZE(e400_lna_filter_lut); i++) {
                if (dev->f_frequency <= e400_lna_filter_lut[i].freq)
                        break;
        }
        if (i == ARRAY_SIZE(e400_lna_filter_lut)) {
                ret = -EINVAL;
                goto err;
        }

        ret = regmap_write(dev->regmap, 0x10, e400_lna_filter_lut[i].val);
        if (ret)
                goto err;

        /* IF filters */
        for (i = 0; i < ARRAY_SIZE(e4000_if_filter_lut); i++) {
                if (dev->f_bandwidth <= e4000_if_filter_lut[i].freq)
                        break;
        }
        if (i == ARRAY_SIZE(e4000_if_filter_lut)) {
                ret = -EINVAL;
                goto err;
        }

        buf[0] = e4000_if_filter_lut[i].reg11_val;
        buf[1] = e4000_if_filter_lut[i].reg12_val;

        ret = regmap_bulk_write(dev->regmap, 0x11, buf, 2);
        if (ret)
                goto err;

        /* frequency band */
        for (i = 0; i < ARRAY_SIZE(e4000_band_lut); i++) {
                if (dev->f_frequency <= e4000_band_lut[i].freq)
                        break;
        }
        if (i == ARRAY_SIZE(e4000_band_lut)) {
                ret = -EINVAL;
                goto err;
        }

        ret = regmap_write(dev->regmap, 0x07, e4000_band_lut[i].reg07_val);
        if (ret)
                goto err;

        ret = regmap_write(dev->regmap, 0x78, e4000_band_lut[i].reg78_val);
        if (ret)
                goto err;

        /* DC offset */
        for (i = 0; i < 4; i++) {
                if (i == 0)
                        ret = regmap_bulk_write(dev->regmap, 0x15, "\x00\x7e\x24", 3);
                else if (i == 1)
                        ret = regmap_bulk_write(dev->regmap, 0x15, "\x00\x7f", 2);
                else if (i == 2)
                        ret = regmap_bulk_write(dev->regmap, 0x15, "\x01", 1);
                else
                        ret = regmap_bulk_write(dev->regmap, 0x16, "\x7e", 1);

                if (ret)
                        goto err;

                ret = regmap_write(dev->regmap, 0x29, 0x01);
                if (ret)
                        goto err;

                ret = regmap_bulk_read(dev->regmap, 0x2a, buf, 3);
                if (ret)
                        goto err;

                i_data[i] = (((buf[2] >> 0) & 0x3) << 6) | (buf[0] & 0x3f);
                q_data[i] = (((buf[2] >> 4) & 0x3) << 6) | (buf[1] & 0x3f);
        }

        swap(q_data[2], q_data[3]);
        swap(i_data[2], i_data[3]);

        ret = regmap_bulk_write(dev->regmap, 0x50, q_data, 4);
        if (ret)
                goto err;

        ret = regmap_bulk_write(dev->regmap, 0x60, i_data, 4);
        if (ret)
                goto err;

        /* gain control auto */
        ret = regmap_write(dev->regmap, 0x1a, 0x17);
        if (ret)
                goto err;

        return 0;
err:
        dev_dbg(&client->dev, "failed=%d\n", ret);
        return ret;
}

/*
 * V4L2 API
 */
#if IS_ENABLED(CONFIG_VIDEO_DEV)
static const struct v4l2_frequency_band bands[] = {
        {
                .type = V4L2_TUNER_RF,
                .index = 0,
                .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
                .rangelow   =    59000000,
                .rangehigh  =  1105000000,
        },
        {
                .type = V4L2_TUNER_RF,
                .index = 1,
                .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
                .rangelow   =  1249000000,
                .rangehigh  =  2208000000UL,
        },
};

static inline struct e4000_dev *e4000_subdev_to_dev(struct v4l2_subdev *sd)
{
        return container_of(sd, struct e4000_dev, sd);
}

static int e4000_standby(struct v4l2_subdev *sd)
{
        struct e4000_dev *dev = e4000_subdev_to_dev(sd);
        int ret;

        ret = e4000_sleep(dev);
        if (ret)
                return ret;

        return e4000_set_params(dev);
}

static int e4000_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *v)
{
        struct e4000_dev *dev = e4000_subdev_to_dev(sd);
        struct i2c_client *client = dev->client;

        dev_dbg(&client->dev, "index=%d\n", v->index);

        strscpy(v->name, "Elonics E4000", sizeof(v->name));
        v->type = V4L2_TUNER_RF;
        v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
        v->rangelow  = bands[0].rangelow;
        v->rangehigh = bands[1].rangehigh;
        return 0;
}

static int e4000_s_tuner(struct v4l2_subdev *sd, const struct v4l2_tuner *v)
{
        struct e4000_dev *dev = e4000_subdev_to_dev(sd);
        struct i2c_client *client = dev->client;

        dev_dbg(&client->dev, "index=%d\n", v->index);
        return 0;
}

static int e4000_g_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *f)
{
        struct e4000_dev *dev = e4000_subdev_to_dev(sd);
        struct i2c_client *client = dev->client;

        dev_dbg(&client->dev, "tuner=%d\n", f->tuner);
        f->frequency = dev->f_frequency;
        return 0;
}

static int e4000_s_frequency(struct v4l2_subdev *sd,
                              const struct v4l2_frequency *f)
{
        struct e4000_dev *dev = e4000_subdev_to_dev(sd);
        struct i2c_client *client = dev->client;

        dev_dbg(&client->dev, "tuner=%d type=%d frequency=%u\n",
                f->tuner, f->type, f->frequency);

        dev->f_frequency = clamp_t(unsigned int, f->frequency,
                                   bands[0].rangelow, bands[1].rangehigh);
        return e4000_set_params(dev);
}

static int e4000_enum_freq_bands(struct v4l2_subdev *sd,
                                  struct v4l2_frequency_band *band)
{
        struct e4000_dev *dev = e4000_subdev_to_dev(sd);
        struct i2c_client *client = dev->client;

        dev_dbg(&client->dev, "tuner=%d type=%d index=%d\n",
                band->tuner, band->type, band->index);

        if (band->index >= ARRAY_SIZE(bands))
                return -EINVAL;

        band->capability = bands[band->index].capability;
        band->rangelow = bands[band->index].rangelow;
        band->rangehigh = bands[band->index].rangehigh;
        return 0;
}

static const struct v4l2_subdev_tuner_ops e4000_subdev_tuner_ops = {
        .standby                  = e4000_standby,
        .g_tuner                  = e4000_g_tuner,
        .s_tuner                  = e4000_s_tuner,
        .g_frequency              = e4000_g_frequency,
        .s_frequency              = e4000_s_frequency,
        .enum_freq_bands          = e4000_enum_freq_bands,
};

static const struct v4l2_subdev_ops e4000_subdev_ops = {
        .tuner                    = &e4000_subdev_tuner_ops,
};

static int e4000_set_lna_gain(struct dvb_frontend *fe)
{
        struct e4000_dev *dev = fe->tuner_priv;
        struct i2c_client *client = dev->client;
        int ret;
        u8 u8tmp;

        dev_dbg(&client->dev, "lna auto=%d->%d val=%d->%d\n",
                dev->lna_gain_auto->cur.val, dev->lna_gain_auto->val,
                dev->lna_gain->cur.val, dev->lna_gain->val);

        if (dev->lna_gain_auto->val && dev->if_gain_auto->cur.val)
                u8tmp = 0x17;
        else if (dev->lna_gain_auto->val)
                u8tmp = 0x19;
        else if (dev->if_gain_auto->cur.val)
                u8tmp = 0x16;
        else
                u8tmp = 0x10;

        ret = regmap_write(dev->regmap, 0x1a, u8tmp);
        if (ret)
                goto err;

        if (dev->lna_gain_auto->val == false) {
                ret = regmap_write(dev->regmap, 0x14, dev->lna_gain->val);
                if (ret)
                        goto err;
        }

        return 0;
err:
        dev_dbg(&client->dev, "failed=%d\n", ret);
        return ret;
}

static int e4000_set_mixer_gain(struct dvb_frontend *fe)
{
        struct e4000_dev *dev = fe->tuner_priv;
        struct i2c_client *client = dev->client;
        int ret;
        u8 u8tmp;

        dev_dbg(&client->dev, "mixer auto=%d->%d val=%d->%d\n",
                dev->mixer_gain_auto->cur.val, dev->mixer_gain_auto->val,
                dev->mixer_gain->cur.val, dev->mixer_gain->val);

        if (dev->mixer_gain_auto->val)
                u8tmp = 0x15;
        else
                u8tmp = 0x14;

        ret = regmap_write(dev->regmap, 0x20, u8tmp);
        if (ret)
                goto err;

        if (dev->mixer_gain_auto->val == false) {
                ret = regmap_write(dev->regmap, 0x15, dev->mixer_gain->val);
                if (ret)
                        goto err;
        }

        return 0;
err:
        dev_dbg(&client->dev, "failed=%d\n", ret);
        return ret;
}

static int e4000_set_if_gain(struct dvb_frontend *fe)
{
        struct e4000_dev *dev = fe->tuner_priv;
        struct i2c_client *client = dev->client;
        int ret;
        u8 buf[2];
        u8 u8tmp;

        dev_dbg(&client->dev, "if auto=%d->%d val=%d->%d\n",
                dev->if_gain_auto->cur.val, dev->if_gain_auto->val,
                dev->if_gain->cur.val, dev->if_gain->val);

        if (dev->if_gain_auto->val && dev->lna_gain_auto->cur.val)
                u8tmp = 0x17;
        else if (dev->lna_gain_auto->cur.val)
                u8tmp = 0x19;
        else if (dev->if_gain_auto->val)
                u8tmp = 0x16;
        else
                u8tmp = 0x10;

        ret = regmap_write(dev->regmap, 0x1a, u8tmp);
        if (ret)
                goto err;

        if (dev->if_gain_auto->val == false) {
                buf[0] = e4000_if_gain_lut[dev->if_gain->val].reg16_val;
                buf[1] = e4000_if_gain_lut[dev->if_gain->val].reg17_val;
                ret = regmap_bulk_write(dev->regmap, 0x16, buf, 2);
                if (ret)
                        goto err;
        }

        return 0;
err:
        dev_dbg(&client->dev, "failed=%d\n", ret);
        return ret;
}

static int e4000_pll_lock(struct dvb_frontend *fe)
{
        struct e4000_dev *dev = fe->tuner_priv;
        struct i2c_client *client = dev->client;
        int ret;
        unsigned int uitmp;

        ret = regmap_read(dev->regmap, 0x07, &uitmp);
        if (ret)
                goto err;

        dev->pll_lock->val = (uitmp & 0x01);

        return 0;
err:
        dev_dbg(&client->dev, "failed=%d\n", ret);
        return ret;
}

static int e4000_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
{
        struct e4000_dev *dev = container_of(ctrl->handler, struct e4000_dev, hdl);
        struct i2c_client *client = dev->client;
        int ret;

        if (!dev->active)
                return 0;

        switch (ctrl->id) {
        case  V4L2_CID_RF_TUNER_PLL_LOCK:
                ret = e4000_pll_lock(dev->fe);
                break;
        default:
                dev_dbg(&client->dev, "unknown ctrl: id=%d name=%s\n",
                        ctrl->id, ctrl->name);
                ret = -EINVAL;
        }

        return ret;
}

static int e4000_s_ctrl(struct v4l2_ctrl *ctrl)
{
        struct e4000_dev *dev = container_of(ctrl->handler, struct e4000_dev, hdl);
        struct i2c_client *client = dev->client;
        int ret;

        if (!dev->active)
                return 0;

        switch (ctrl->id) {
        case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:
        case V4L2_CID_RF_TUNER_BANDWIDTH:
                /*
                 * TODO: Auto logic does not work 100% correctly as tuner driver
                 * do not have information to calculate maximum suitable
                 * bandwidth. Calculating it is responsible of master driver.
                 */
                dev->f_bandwidth = dev->bandwidth->val;
                ret = e4000_set_params(dev);
                break;
        case  V4L2_CID_RF_TUNER_LNA_GAIN_AUTO:
        case  V4L2_CID_RF_TUNER_LNA_GAIN:
                ret = e4000_set_lna_gain(dev->fe);
                break;
        case  V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO:
        case  V4L2_CID_RF_TUNER_MIXER_GAIN:
                ret = e4000_set_mixer_gain(dev->fe);
                break;
        case  V4L2_CID_RF_TUNER_IF_GAIN_AUTO:
        case  V4L2_CID_RF_TUNER_IF_GAIN:
                ret = e4000_set_if_gain(dev->fe);
                break;
        default:
                dev_dbg(&client->dev, "unknown ctrl: id=%d name=%s\n",
                        ctrl->id, ctrl->name);
                ret = -EINVAL;
        }

        return ret;
}

static const struct v4l2_ctrl_ops e4000_ctrl_ops = {
        .g_volatile_ctrl = e4000_g_volatile_ctrl,
        .s_ctrl = e4000_s_ctrl,
};
#endif

/*
 * DVB API
 */
static int e4000_dvb_set_params(struct dvb_frontend *fe)
{
        struct e4000_dev *dev = fe->tuner_priv;
        struct dtv_frontend_properties *c = &fe->dtv_property_cache;

        dev->f_frequency = c->frequency;
        dev->f_bandwidth = c->bandwidth_hz;
        return e4000_set_params(dev);
}

static int e4000_dvb_init(struct dvb_frontend *fe)
{
        return e4000_init(fe->tuner_priv);
}

static int e4000_dvb_sleep(struct dvb_frontend *fe)
{
        return e4000_sleep(fe->tuner_priv);
}

static int e4000_dvb_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
{
        *frequency = 0; /* Zero-IF */
        return 0;
}

static const struct dvb_tuner_ops e4000_dvb_tuner_ops = {
        .info = {
                .name              = "Elonics E4000",
                .frequency_min_hz  = 174 * MHz,
                .frequency_max_hz  = 862 * MHz,
        },

        .init = e4000_dvb_init,
        .sleep = e4000_dvb_sleep,
        .set_params = e4000_dvb_set_params,

        .get_if_frequency = e4000_dvb_get_if_frequency,
};

static int e4000_probe(struct i2c_client *client)
{
        struct e4000_dev *dev;
        struct e4000_config *cfg = client->dev.platform_data;
        struct dvb_frontend *fe = cfg->fe;
        int ret;
        unsigned int uitmp;
        static const struct regmap_config regmap_config = {
                .reg_bits = 8,
                .val_bits = 8,
        };

        dev = kzalloc_obj(*dev);
        if (!dev) {
                ret = -ENOMEM;
                goto err;
        }

        dev->clk = cfg->clock;
        dev->client = client;
        dev->fe = cfg->fe;
        dev->regmap = devm_regmap_init_i2c(client, &regmap_config);
        if (IS_ERR(dev->regmap)) {
                ret = PTR_ERR(dev->regmap);
                goto err_kfree;
        }

        /* check if the tuner is there */
        ret = regmap_read(dev->regmap, 0x02, &uitmp);
        if (ret)
                goto err_kfree;

        dev_dbg(&client->dev, "chip id=%02x\n", uitmp);

        if (uitmp != 0x40) {
                ret = -ENODEV;
                goto err_kfree;
        }

        /* put sleep as chip seems to be in normal mode by default */
        ret = regmap_write(dev->regmap, 0x00, 0x00);
        if (ret)
                goto err_kfree;

#if IS_ENABLED(CONFIG_VIDEO_DEV)
        /* Register controls */
        v4l2_ctrl_handler_init(&dev->hdl, 9);
        dev->bandwidth_auto = v4l2_ctrl_new_std(&dev->hdl, &e4000_ctrl_ops,
                        V4L2_CID_RF_TUNER_BANDWIDTH_AUTO, 0, 1, 1, 1);
        dev->bandwidth = v4l2_ctrl_new_std(&dev->hdl, &e4000_ctrl_ops,
                        V4L2_CID_RF_TUNER_BANDWIDTH, 4300000, 11000000, 100000, 4300000);
        v4l2_ctrl_auto_cluster(2, &dev->bandwidth_auto, 0, false);
        dev->lna_gain_auto = v4l2_ctrl_new_std(&dev->hdl, &e4000_ctrl_ops,
                        V4L2_CID_RF_TUNER_LNA_GAIN_AUTO, 0, 1, 1, 1);
        dev->lna_gain = v4l2_ctrl_new_std(&dev->hdl, &e4000_ctrl_ops,
                        V4L2_CID_RF_TUNER_LNA_GAIN, 0, 15, 1, 10);
        v4l2_ctrl_auto_cluster(2, &dev->lna_gain_auto, 0, false);
        dev->mixer_gain_auto = v4l2_ctrl_new_std(&dev->hdl, &e4000_ctrl_ops,
                        V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO, 0, 1, 1, 1);
        dev->mixer_gain = v4l2_ctrl_new_std(&dev->hdl, &e4000_ctrl_ops,
                        V4L2_CID_RF_TUNER_MIXER_GAIN, 0, 1, 1, 1);
        v4l2_ctrl_auto_cluster(2, &dev->mixer_gain_auto, 0, false);
        dev->if_gain_auto = v4l2_ctrl_new_std(&dev->hdl, &e4000_ctrl_ops,
                        V4L2_CID_RF_TUNER_IF_GAIN_AUTO, 0, 1, 1, 1);
        dev->if_gain = v4l2_ctrl_new_std(&dev->hdl, &e4000_ctrl_ops,
                        V4L2_CID_RF_TUNER_IF_GAIN, 0, 54, 1, 0);
        v4l2_ctrl_auto_cluster(2, &dev->if_gain_auto, 0, false);
        dev->pll_lock = v4l2_ctrl_new_std(&dev->hdl, &e4000_ctrl_ops,
                        V4L2_CID_RF_TUNER_PLL_LOCK,  0, 1, 1, 0);
        if (dev->hdl.error) {
                ret = dev->hdl.error;
                dev_err(&client->dev, "Could not initialize controls\n");
                v4l2_ctrl_handler_free(&dev->hdl);
                goto err_kfree;
        }

        dev->sd.ctrl_handler = &dev->hdl;
        dev->f_frequency = bands[0].rangelow;
        dev->f_bandwidth = dev->bandwidth->val;
        v4l2_i2c_subdev_init(&dev->sd, client, &e4000_subdev_ops);
#endif
        fe->tuner_priv = dev;
        memcpy(&fe->ops.tuner_ops, &e4000_dvb_tuner_ops,
               sizeof(fe->ops.tuner_ops));
        v4l2_set_subdevdata(&dev->sd, client);
        i2c_set_clientdata(client, &dev->sd);

        dev_info(&client->dev, "Elonics E4000 successfully identified\n");
        return 0;
err_kfree:
        kfree(dev);
err:
        dev_dbg(&client->dev, "failed=%d\n", ret);
        return ret;
}

static void e4000_remove(struct i2c_client *client)
{
        struct v4l2_subdev *sd = i2c_get_clientdata(client);
        struct e4000_dev *dev = container_of(sd, struct e4000_dev, sd);

        dev_dbg(&client->dev, "\n");

#if IS_ENABLED(CONFIG_VIDEO_DEV)
        v4l2_ctrl_handler_free(&dev->hdl);
#endif
        kfree(dev);
}

static const struct i2c_device_id e4000_id_table[] = {
        { .name = "e4000" },
        { }
};
MODULE_DEVICE_TABLE(i2c, e4000_id_table);

static struct i2c_driver e4000_driver = {
        .driver = {
                .name   = "e4000",
                .suppress_bind_attrs = true,
        },
        .probe          = e4000_probe,
        .remove         = e4000_remove,
        .id_table       = e4000_id_table,
};

module_i2c_driver(e4000_driver);

MODULE_DESCRIPTION("Elonics E4000 silicon tuner driver");
MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
MODULE_LICENSE("GPL");
Linux
