text: /*
   * Sony CXD2820R demodulator driver
   *
   * Copyright (C) 2010 Antti Palosaari <crope@iki.fi>
   *
   *    This program is free software; you can redistribute it and/or modify
   *    it under the terms of the GNU General Public License as published by
   *    the Free Software Foundation; either version 2 of the License, or
   *    (at your option) any later version.
   *
   *    This program is distributed in the hope that it will be useful,
   *    but WITHOUT ANY WARRANTY; without even the implied warranty of
   *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *    GNU General Public License for more details.
   *
   *    You should have received a copy of the GNU General Public License along
   *    with this program; if not, write to the Free Software Foundation, Inc.,
   *    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
   */
  
  
  #include "cxd2820r_priv.h"
  
  /* Write register table */
  int cxd2820r_wr_reg_val_mask_tab(struct cxd2820r_priv *priv,
  				 const struct reg_val_mask *tab, int tab_len)
  {
  	struct i2c_client *client = priv->client[0];
  	int ret;
  	unsigned int i, reg, mask, val;
  	struct regmap *regmap;
  
  	dev_dbg(&client->dev, "tab_len=%d\n", tab_len);
  
  	for (i = 0; i < tab_len; i++) {
  		if ((tab[i].reg >> 16) & 0x1)
  			regmap = priv->regmap[1];
  		else
  			regmap = priv->regmap[0];
  
  		reg = (tab[i].reg >> 0) & 0xffff;
  		val = tab[i].val;
  		mask = tab[i].mask;
  
  		if (mask == 0xff)
  			ret = regmap_write(regmap, reg, val);
  		else
  			ret = regmap_write_bits(regmap, reg, mask, val);
  		if (ret)
  			goto error;
  	}
  
  	return 0;
  error:
  	dev_dbg(&client->dev, "failed=%d\n", ret);
  	return ret;
  }
  
  int cxd2820r_gpio(struct dvb_frontend *fe, u8 *gpio)
  {
  	struct cxd2820r_priv *priv = fe->demodulator_priv;
  	struct i2c_client *client = priv->client[0];
  	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
  	int ret, i;
  	u8 tmp0, tmp1;
  
  	dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
  
  	/* update GPIOs only when needed */
  	if (!memcmp(gpio, priv->gpio, sizeof(priv->gpio)))
  		return 0;
  
  	tmp0 = 0x00;
  	tmp1 = 0x00;
  	for (i = 0; i < sizeof(priv->gpio); i++) {
  		/* enable / disable */
  		if (gpio[i] & CXD2820R_GPIO_E)
  			tmp0 |= (2 << 6) >> (2 * i);
  		else
  			tmp0 |= (1 << 6) >> (2 * i);
  
  		/* input / output */
  		if (gpio[i] & CXD2820R_GPIO_I)
  			tmp1 |= (1 << (3 + i));
  		else
  			tmp1 |= (0 << (3 + i));
  
  		/* high / low */
  		if (gpio[i] & CXD2820R_GPIO_H)
  			tmp1 |= (1 << (0 + i));
  		else
  			tmp1 |= (0 << (0 + i));
  
  		dev_dbg(&client->dev, "gpio i=%d %02x %02x\n", i, tmp0, tmp1);
  	}
  
  	dev_dbg(&client->dev, "wr gpio=%02x %02x\n", tmp0, tmp1);
  
  	/* write bits [7:2] */
  	ret = regmap_update_bits(priv->regmap[0], 0x0089, 0xfc, tmp0);
  	if (ret)
  		goto error;
  
  	/* write bits [5:0] */
  	ret = regmap_update_bits(priv->regmap[0], 0x008e, 0x3f, tmp1);
  	if (ret)
  		goto error;
  
  	memcpy(priv->gpio, gpio, sizeof(priv->gpio));
  
  	return ret;
  error:
  	dev_dbg(&client->dev, "failed=%d\n", ret);
  	return ret;
  }
  
  static int cxd2820r_set_frontend(struct dvb_frontend *fe)
  {
  	struct cxd2820r_priv *priv = fe->demodulator_priv;
  	struct i2c_client *client = priv->client[0];
  	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
  	int ret;
  
  	dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
  
  	switch (c->delivery_system) {
  	case SYS_DVBT:
  		ret = cxd2820r_init_t(fe);
  		if (ret < 0)
  			goto err;
  		ret = cxd2820r_set_frontend_t(fe);
  		if (ret < 0)
  			goto err;
  		break;
  	case SYS_DVBT2:
  		ret = cxd2820r_init_t(fe);
  		if (ret < 0)
  			goto err;
  		ret = cxd2820r_set_frontend_t2(fe);
  		if (ret < 0)
  			goto err;
  		break;
  	case SYS_DVBC_ANNEX_A:
  		ret = cxd2820r_init_c(fe);
  		if (ret < 0)
  			goto err;
  		ret = cxd2820r_set_frontend_c(fe);
  		if (ret < 0)
  			goto err;
  		break;
  	default:
  		dev_dbg(&client->dev, "invalid delivery_system\n");
  		ret = -EINVAL;
  		break;
  	}
  err:
  	return ret;
  }
  
  static int cxd2820r_read_status(struct dvb_frontend *fe, enum fe_status *status)
  {
  	struct cxd2820r_priv *priv = fe->demodulator_priv;
  	struct i2c_client *client = priv->client[0];
  	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
  	int ret;
  
  	dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
  
  	switch (c->delivery_system) {
  	case SYS_DVBT:
  		ret = cxd2820r_read_status_t(fe, status);
  		break;
  	case SYS_DVBT2:
  		ret = cxd2820r_read_status_t2(fe, status);
  		break;
  	case SYS_DVBC_ANNEX_A:
  		ret = cxd2820r_read_status_c(fe, status);
  		break;
  	default:
  		ret = -EINVAL;
  		break;
  	}
  	return ret;
  }
  
  static int cxd2820r_get_frontend(struct dvb_frontend *fe,
  				 struct dtv_frontend_properties *p)
  {
  	struct cxd2820r_priv *priv = fe->demodulator_priv;
  	struct i2c_client *client = priv->client[0];
  	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
  	int ret;
  
  	dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
  
  	if (priv->delivery_system == SYS_UNDEFINED)
  		return 0;
  
  	switch (c->delivery_system) {
  	case SYS_DVBT:
  		ret = cxd2820r_get_frontend_t(fe, p);
  		break;
  	case SYS_DVBT2:
  		ret = cxd2820r_get_frontend_t2(fe, p);
  		break;
  	case SYS_DVBC_ANNEX_A:
  		ret = cxd2820r_get_frontend_c(fe, p);
  		break;
  	default:
  		ret = -EINVAL;
  		break;
  	}
  	return ret;
  }
  
  static int cxd2820r_read_ber(struct dvb_frontend *fe, u32 *ber)
  {
  	struct cxd2820r_priv *priv = fe->demodulator_priv;
  	struct i2c_client *client = priv->client[0];
  	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
  
  	dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
  
  	*ber = (priv->post_bit_error - priv->post_bit_error_prev_dvbv3);
  	priv->post_bit_error_prev_dvbv3 = priv->post_bit_error;
  
  	return 0;
  }
  
  static int cxd2820r_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
  {
  	struct cxd2820r_priv *priv = fe->demodulator_priv;
  	struct i2c_client *client = priv->client[0];
  	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
  
  	dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
  
  	if (c->strength.stat[0].scale == FE_SCALE_RELATIVE)
  		*strength = c->strength.stat[0].uvalue;
  	else
  		*strength = 0;
  
  	return 0;
  }
  
  static int cxd2820r_read_snr(struct dvb_frontend *fe, u16 *snr)
  {
  	struct cxd2820r_priv *priv = fe->demodulator_priv;
  	struct i2c_client *client = priv->client[0];
  	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
  
  	dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
  
  	if (c->cnr.stat[0].scale == FE_SCALE_DECIBEL)
  		*snr = div_s64(c->cnr.stat[0].svalue, 100);
  	else
  		*snr = 0;
  
  	return 0;
  }
  
  static int cxd2820r_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
  {
  	struct cxd2820r_priv *priv = fe->demodulator_priv;
  	struct i2c_client *client = priv->client[0];
  	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
  
  	dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
  
  	*ucblocks = 0;
  
  	return 0;
  }
  
  static int cxd2820r_init(struct dvb_frontend *fe)
  {
  	return 0;
  }
  
  static int cxd2820r_sleep(struct dvb_frontend *fe)
  {
  	struct cxd2820r_priv *priv = fe->demodulator_priv;
  	struct i2c_client *client = priv->client[0];
  	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
  	int ret;
  
  	dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
  
  	switch (c->delivery_system) {
  	case SYS_DVBT:
  		ret = cxd2820r_sleep_t(fe);
  		break;
  	case SYS_DVBT2:
  		ret = cxd2820r_sleep_t2(fe);
  		break;
  	case SYS_DVBC_ANNEX_A:
  		ret = cxd2820r_sleep_c(fe);
  		break;
  	default:
  		ret = -EINVAL;
  		break;
  	}
  	return ret;
  }
  
  static int cxd2820r_get_tune_settings(struct dvb_frontend *fe,
  				      struct dvb_frontend_tune_settings *s)
  {
  	struct cxd2820r_priv *priv = fe->demodulator_priv;
  	struct i2c_client *client = priv->client[0];
  	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
  	int ret;
  
  	dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
  
  	switch (c->delivery_system) {
  	case SYS_DVBT:
  		ret = cxd2820r_get_tune_settings_t(fe, s);
  		break;
  	case SYS_DVBT2:
  		ret = cxd2820r_get_tune_settings_t2(fe, s);
  		break;
  	case SYS_DVBC_ANNEX_A:
  		ret = cxd2820r_get_tune_settings_c(fe, s);
  		break;
  	default:
  		ret = -EINVAL;
  		break;
  	}
  	return ret;
  }
  
  static enum dvbfe_search cxd2820r_search(struct dvb_frontend *fe)
  {
  	struct cxd2820r_priv *priv = fe->demodulator_priv;
  	struct i2c_client *client = priv->client[0];
  	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
  	int ret, i;
  	enum fe_status status = 0;
  
  	dev_dbg(&client->dev, "delivery_system=%d\n", c->delivery_system);
  
  	/* switch between DVB-T and DVB-T2 when tune fails */
  	if (priv->last_tune_failed) {
  		if (priv->delivery_system == SYS_DVBT) {
  			ret = cxd2820r_sleep_t(fe);
  			if (ret)
  				goto error;
  
  			c->delivery_system = SYS_DVBT2;
  		} else if (priv->delivery_system == SYS_DVBT2) {
  			ret = cxd2820r_sleep_t2(fe);
  			if (ret)
  				goto error;
  
  			c->delivery_system = SYS_DVBT;
  		}
  	}
  
  	/* set frontend */
  	ret = cxd2820r_set_frontend(fe);
  	if (ret)
  		goto error;
  
  	/* frontend lock wait loop count */
  	switch (priv->delivery_system) {
  	case SYS_DVBT:
  	case SYS_DVBC_ANNEX_A:
  		i = 20;
  		break;
  	case SYS_DVBT2:
  		i = 40;
  		break;
  	case SYS_UNDEFINED:
  	default:
  		i = 0;
  		break;
  	}
  
  	/* wait frontend lock */
  	for (; i > 0; i--) {
  		dev_dbg(&client->dev, "loop=%d\n", i);
  		msleep(50);
  		ret = cxd2820r_read_status(fe, &status);
  		if (ret)
  			goto error;
  
  		if (status & FE_HAS_LOCK)
  			break;
  	}
  
  	/* check if we have a valid signal */
  	if (status & FE_HAS_LOCK) {
  		priv->last_tune_failed = false;
  		return DVBFE_ALGO_SEARCH_SUCCESS;
  	} else {
  		priv->last_tune_failed = true;
  		return DVBFE_ALGO_SEARCH_AGAIN;
  	}
  
  error:
  	dev_dbg(&client->dev, "failed=%d\n", ret);
  	return DVBFE_ALGO_SEARCH_ERROR;
  }
  
  static enum dvbfe_algo cxd2820r_get_frontend_algo(struct dvb_frontend *fe)
  {
  	return DVBFE_ALGO_CUSTOM;
  }
  
  static void cxd2820r_release(struct dvb_frontend *fe)
  {
  	struct cxd2820r_priv *priv = fe->demodulator_priv;
  	struct i2c_client *client = priv->client[0];
  
  	dev_dbg(&client->dev, "\n");
  
  	i2c_unregister_device(client);
  
  	return;
  }
  
  static int cxd2820r_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
  {
  	struct cxd2820r_priv *priv = fe->demodulator_priv;
  	struct i2c_client *client = priv->client[0];
  
  	dev_dbg_ratelimited(&client->dev, "enable=%d\n", enable);
  
  	return regmap_update_bits(priv->regmap[0], 0x00db, 0x01, enable ? 1 : 0);
  }
  
  #ifdef CONFIG_GPIOLIB
  static int cxd2820r_gpio_direction_output(struct gpio_chip *chip, unsigned nr,
  		int val)
  {
  	struct cxd2820r_priv *priv = gpiochip_get_data(chip);
  	struct i2c_client *client = priv->client[0];
  	u8 gpio[GPIO_COUNT];
  
  	dev_dbg(&client->dev, "nr=%u val=%d\n", nr, val);
  
  	memcpy(gpio, priv->gpio, sizeof(gpio));
  	gpio[nr] = CXD2820R_GPIO_E | CXD2820R_GPIO_O | (val << 2);
  
  	return cxd2820r_gpio(&priv->fe, gpio);
  }
  
  static void cxd2820r_gpio_set(struct gpio_chip *chip, unsigned nr, int val)
  {
  	struct cxd2820r_priv *priv = gpiochip_get_data(chip);
  	struct i2c_client *client = priv->client[0];
  	u8 gpio[GPIO_COUNT];
  
  	dev_dbg(&client->dev, "nr=%u val=%d\n", nr, val);
  
  	memcpy(gpio, priv->gpio, sizeof(gpio));
  	gpio[nr] = CXD2820R_GPIO_E | CXD2820R_GPIO_O | (val << 2);
  
  	(void) cxd2820r_gpio(&priv->fe, gpio);
  
  	return;
  }
  
  static int cxd2820r_gpio_get(struct gpio_chip *chip, unsigned nr)
  {
  	struct cxd2820r_priv *priv = gpiochip_get_data(chip);
  	struct i2c_client *client = priv->client[0];
  
  	dev_dbg(&client->dev, "nr=%u\n", nr);
  
  	return (priv->gpio[nr] >> 2) & 0x01;
  }
  #endif
  
  static const struct dvb_frontend_ops cxd2820r_ops = {
  	.delsys = { SYS_DVBT, SYS_DVBT2, SYS_DVBC_ANNEX_A },
  	/* default: DVB-T/T2 */
  	.info = {
  		.name = "Sony CXD2820R",
  
  		.caps =	FE_CAN_FEC_1_2			|
  			FE_CAN_FEC_2_3			|
  			FE_CAN_FEC_3_4			|
  			FE_CAN_FEC_5_6			|
  			FE_CAN_FEC_7_8			|
  			FE_CAN_FEC_AUTO			|
  			FE_CAN_QPSK			|
  			FE_CAN_QAM_16			|
  			FE_CAN_QAM_32			|
  			FE_CAN_QAM_64			|
  			FE_CAN_QAM_128			|
  			FE_CAN_QAM_256			|
  			FE_CAN_QAM_AUTO			|
  			FE_CAN_TRANSMISSION_MODE_AUTO	|
  			FE_CAN_GUARD_INTERVAL_AUTO	|
  			FE_CAN_HIERARCHY_AUTO		|
  			FE_CAN_MUTE_TS			|
  			FE_CAN_2G_MODULATION		|
  			FE_CAN_MULTISTREAM
  		},
  
  	.release		= cxd2820r_release,
  	.init			= cxd2820r_init,
  	.sleep			= cxd2820r_sleep,
  
  	.get_tune_settings	= cxd2820r_get_tune_settings,
  	.i2c_gate_ctrl		= cxd2820r_i2c_gate_ctrl,
  
  	.get_frontend		= cxd2820r_get_frontend,
  
  	.get_frontend_algo	= cxd2820r_get_frontend_algo,
  	.search			= cxd2820r_search,
  
  	.read_status		= cxd2820r_read_status,
  	.read_snr		= cxd2820r_read_snr,
  	.read_ber		= cxd2820r_read_ber,
  	.read_ucblocks		= cxd2820r_read_ucblocks,
  	.read_signal_strength	= cxd2820r_read_signal_strength,
  };
  
  /*
   * XXX: That is wrapper to cxd2820r_probe() via driver core in order to provide
   * proper I2C client for legacy media attach binding.
   * New users must use I2C client binding directly!
   */
  struct dvb_frontend *cxd2820r_attach(const struct cxd2820r_config *config,
  				     struct i2c_adapter *adapter,
  				     int *gpio_chip_base)
  {
  	struct i2c_client *client;
  	struct i2c_board_info board_info;
  	struct cxd2820r_platform_data pdata;
  
  	pdata.ts_mode = config->ts_mode;
  	pdata.ts_clk_inv = config->ts_clock_inv;
  	pdata.if_agc_polarity = config->if_agc_polarity;
  	pdata.spec_inv = config->spec_inv;
  	pdata.gpio_chip_base = &gpio_chip_base;
  	pdata.attach_in_use = true;
  
  	memset(&board_info, 0, sizeof(board_info));
  	strscpy(board_info.type, "cxd2820r", I2C_NAME_SIZE);
  	board_info.addr = config->i2c_address;
  	board_info.platform_data = &pdata;
  	client = i2c_new_device(adapter, &board_info);
  	if (!client || !client->dev.driver)
  		return NULL;
  
  	return pdata.get_dvb_frontend(client);
  }
  EXPORT_SYMBOL(cxd2820r_attach);
  
  static struct dvb_frontend *cxd2820r_get_dvb_frontend(struct i2c_client *client)
  {
  	struct cxd2820r_priv *priv = i2c_get_clientdata(client);
  
  	dev_dbg(&client->dev, "\n");
  
  	return &priv->fe;
  }
  
  static int cxd2820r_probe(struct i2c_client *client,
  			  const struct i2c_device_id *id)
  {
  	struct cxd2820r_platform_data *pdata = client->dev.platform_data;
  	struct cxd2820r_priv *priv;
  	int ret, *gpio_chip_base;
  	unsigned int utmp;
  	static const struct regmap_range_cfg regmap_range_cfg0[] = {
  		{
  			.range_min        = 0x0000,
  			.range_max        = 0x3fff,
  			.selector_reg     = 0x00,
  			.selector_mask    = 0xff,
  			.selector_shift   = 0,
  			.window_start     = 0x00,
  			.window_len       = 0x100,
  		},
  	};
  	static const struct regmap_range_cfg regmap_range_cfg1[] = {
  		{
  			.range_min        = 0x0000,
  			.range_max        = 0x01ff,
  			.selector_reg     = 0x00,
  			.selector_mask    = 0xff,
  			.selector_shift   = 0,
  			.window_start     = 0x00,
  			.window_len       = 0x100,
  		},
  	};
  	static const struct regmap_config regmap_config0 = {
  		.reg_bits = 8,
  		.val_bits = 8,
  		.max_register = 0x3fff,
  		.ranges = regmap_range_cfg0,
  		.num_ranges = ARRAY_SIZE(regmap_range_cfg0),
  		.cache_type = REGCACHE_NONE,
  	};
  	static const struct regmap_config regmap_config1 = {
  		.reg_bits = 8,
  		.val_bits = 8,
  		.max_register = 0x01ff,
  		.ranges = regmap_range_cfg1,
  		.num_ranges = ARRAY_SIZE(regmap_range_cfg1),
  		.cache_type = REGCACHE_NONE,
  	};
  
  	dev_dbg(&client->dev, "\n");
  
  	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
  	if (!priv) {
  		ret = -ENOMEM;
  		goto err;
  	}
  
  	priv->client[0] = client;
  	priv->fe.demodulator_priv = priv;
  	priv->i2c = client->adapter;
  	priv->ts_mode = pdata->ts_mode;
  	priv->ts_clk_inv = pdata->ts_clk_inv;
  	priv->if_agc_polarity = pdata->if_agc_polarity;
  	priv->spec_inv = pdata->spec_inv;
  	gpio_chip_base = *pdata->gpio_chip_base;
  	priv->regmap[0] = regmap_init_i2c(priv->client[0], &regmap_config0);
  	if (IS_ERR(priv->regmap[0])) {
  		ret = PTR_ERR(priv->regmap[0]);
  		goto err_kfree;
  	}
  
  	/* Check demod answers with correct chip id */
  	ret = regmap_read(priv->regmap[0], 0x00fd, &utmp);
  	if (ret)
  		goto err_regmap_0_regmap_exit;
  
  	dev_dbg(&client->dev, "chip_id=%02x\n", utmp);
  
  	if (utmp != 0xe1) {
  		ret = -ENODEV;
  		goto err_regmap_0_regmap_exit;
  	}
  
  	/*
  	 * Chip has two I2C addresses for different register banks. We register
  	 * one dummy I2C client in in order to get own I2C client for each
  	 * register bank.
  	 */
  	priv->client[1] = i2c_new_dummy(client->adapter, client->addr | (1 << 1));
  	if (!priv->client[1]) {
  		ret = -ENODEV;
  		dev_err(&client->dev, "I2C registration failed\n");
  		if (ret)
  			goto err_regmap_0_regmap_exit;
  	}
  
  	priv->regmap[1] = regmap_init_i2c(priv->client[1], &regmap_config1);
  	if (IS_ERR(priv->regmap[1])) {
  		ret = PTR_ERR(priv->regmap[1]);
  		goto err_client_1_i2c_unregister_device;
  	}
  
  	if (gpio_chip_base) {
  #ifdef CONFIG_GPIOLIB
  		/* Add GPIOs */
  		priv->gpio_chip.label = KBUILD_MODNAME;
  		priv->gpio_chip.parent = &client->dev;
  		priv->gpio_chip.owner = THIS_MODULE;
  		priv->gpio_chip.direction_output = cxd2820r_gpio_direction_output;
  		priv->gpio_chip.set = cxd2820r_gpio_set;
  		priv->gpio_chip.get = cxd2820r_gpio_get;
  		priv->gpio_chip.base = -1; /* Dynamic allocation */
  		priv->gpio_chip.ngpio = GPIO_COUNT;
  		priv->gpio_chip.can_sleep = 1;
  		ret = gpiochip_add_data(&priv->gpio_chip, priv);
  		if (ret)
  			goto err_regmap_1_regmap_exit;
  
  		dev_dbg(&client->dev, "gpio_chip.base=%d\n",
  			priv->gpio_chip.base);
  
  		*gpio_chip_base = priv->gpio_chip.base;
  #else
  		/*
  		 * Use static GPIO configuration if GPIOLIB is undefined.
  		 * This is fallback condition.
  		 */
  		u8 gpio[GPIO_COUNT];
  		gpio[0] = (*gpio_chip_base >> 0) & 0x07;
  		gpio[1] = (*gpio_chip_base >> 3) & 0x07;
  		gpio[2] = 0;
  		ret = cxd2820r_gpio(&priv->fe, gpio);
  		if (ret)
  			goto err_regmap_1_regmap_exit;
  #endif
  	}
  
  	/* Create dvb frontend */
  	memcpy(&priv->fe.ops, &cxd2820r_ops, sizeof(priv->fe.ops));
  	if (!pdata->attach_in_use)
  		priv->fe.ops.release = NULL;
  	i2c_set_clientdata(client, priv);
  
  	/* Setup callbacks */
  	pdata->get_dvb_frontend = cxd2820r_get_dvb_frontend;
  
  	dev_info(&client->dev, "Sony CXD2820R successfully identified\n");
  
  	return 0;
  err_regmap_1_regmap_exit:
  	regmap_exit(priv->regmap[1]);
  err_client_1_i2c_unregister_device:
  	i2c_unregister_device(priv->client[1]);
  err_regmap_0_regmap_exit:
  	regmap_exit(priv->regmap[0]);
  err_kfree:
  	kfree(priv);
  err:
  	dev_dbg(&client->dev, "failed=%d\n", ret);
  	return ret;
  }
  
  static int cxd2820r_remove(struct i2c_client *client)
  {
  	struct cxd2820r_priv *priv = i2c_get_clientdata(client);
  
  	dev_dbg(&client->dev, "\n");
  
  #ifdef CONFIG_GPIOLIB
  	if (priv->gpio_chip.label)
  		gpiochip_remove(&priv->gpio_chip);
  #endif
  	regmap_exit(priv->regmap[1]);
  	i2c_unregister_device(priv->client[1]);
  
  	regmap_exit(priv->regmap[0]);
  
  	kfree(priv);
  
  	return 0;
  }
  
  static const struct i2c_device_id cxd2820r_id_table[] = {
  	{"cxd2820r", 0},
  	{}
  };
  MODULE_DEVICE_TABLE(i2c, cxd2820r_id_table);
  
  static struct i2c_driver cxd2820r_driver = {
  	.driver = {
  		.name                = "cxd2820r",
  		.suppress_bind_attrs = true,
  	},
  	.probe    = cxd2820r_probe,
  	.remove   = cxd2820r_remove,
  	.id_table = cxd2820r_id_table,
  };
  
  module_i2c_driver(cxd2820r_driver);
  
  MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
  MODULE_DESCRIPTION("Sony CXD2820R demodulator driver");
  MODULE_LICENSE("GPL");
  