c942fddf87
Based on 3 normalized pattern(s): 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 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 [author] [kishon] [vijay] [abraham] [i] [kishon]@[ti] [com] 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 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 [author] [graeme] [gregory] [gg]@[slimlogic] [co] [uk] [author] [kishon] [vijay] [abraham] [i] [kishon]@[ti] [com] [based] [on] [twl6030]_[usb] [c] [author] [hema] [hk] [hemahk]@[ti] [com] 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1105 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.202006027@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
132 lines
2.5 KiB
C
132 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Allegro A8293 SEC driver
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*
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* Copyright (C) 2011 Antti Palosaari <crope@iki.fi>
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*/
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#include "a8293.h"
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struct a8293_dev {
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struct i2c_client *client;
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u8 reg[2];
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};
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static int a8293_set_voltage(struct dvb_frontend *fe,
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enum fe_sec_voltage fe_sec_voltage)
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{
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struct a8293_dev *dev = fe->sec_priv;
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struct i2c_client *client = dev->client;
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int ret;
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u8 reg0, reg1;
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dev_dbg(&client->dev, "fe_sec_voltage=%d\n", fe_sec_voltage);
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switch (fe_sec_voltage) {
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case SEC_VOLTAGE_OFF:
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/* ENB=0 */
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reg0 = 0x10;
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break;
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case SEC_VOLTAGE_13:
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/* VSEL0=1, VSEL1=0, VSEL2=0, VSEL3=0, ENB=1*/
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reg0 = 0x31;
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break;
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case SEC_VOLTAGE_18:
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/* VSEL0=0, VSEL1=0, VSEL2=0, VSEL3=1, ENB=1*/
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reg0 = 0x38;
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break;
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default:
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ret = -EINVAL;
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goto err;
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}
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if (reg0 != dev->reg[0]) {
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ret = i2c_master_send(client, ®0, 1);
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if (ret < 0)
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goto err;
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dev->reg[0] = reg0;
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}
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/* TMODE=0, TGATE=1 */
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reg1 = 0x82;
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if (reg1 != dev->reg[1]) {
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ret = i2c_master_send(client, ®1, 1);
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if (ret < 0)
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goto err;
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dev->reg[1] = reg1;
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}
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usleep_range(1500, 50000);
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return 0;
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err:
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dev_dbg(&client->dev, "failed=%d\n", ret);
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return ret;
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}
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static int a8293_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct a8293_dev *dev;
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struct a8293_platform_data *pdata = client->dev.platform_data;
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struct dvb_frontend *fe = pdata->dvb_frontend;
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int ret;
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u8 buf[2];
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dev = kzalloc(sizeof(*dev), GFP_KERNEL);
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if (!dev) {
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ret = -ENOMEM;
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goto err;
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}
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dev->client = client;
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/* check if the SEC is there */
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ret = i2c_master_recv(client, buf, 2);
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if (ret < 0)
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goto err_kfree;
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/* override frontend ops */
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fe->ops.set_voltage = a8293_set_voltage;
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fe->sec_priv = dev;
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i2c_set_clientdata(client, dev);
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dev_info(&client->dev, "Allegro A8293 SEC successfully attached\n");
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return 0;
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err_kfree:
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kfree(dev);
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err:
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dev_dbg(&client->dev, "failed=%d\n", ret);
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return ret;
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}
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static int a8293_remove(struct i2c_client *client)
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{
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struct a8293_dev *dev = i2c_get_clientdata(client);
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dev_dbg(&client->dev, "\n");
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kfree(dev);
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return 0;
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}
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static const struct i2c_device_id a8293_id_table[] = {
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{"a8293", 0},
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{}
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};
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MODULE_DEVICE_TABLE(i2c, a8293_id_table);
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static struct i2c_driver a8293_driver = {
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.driver = {
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.name = "a8293",
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.suppress_bind_attrs = true,
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},
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.probe = a8293_probe,
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.remove = a8293_remove,
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.id_table = a8293_id_table,
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};
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module_i2c_driver(a8293_driver);
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MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
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MODULE_DESCRIPTION("Allegro A8293 SEC driver");
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MODULE_LICENSE("GPL");
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