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path: root/drivers/media/radio/si470x/radio-si470x-i2c.c
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Diffstat (limited to 'drivers/media/radio/si470x/radio-si470x-i2c.c')
-rw-r--r--drivers/media/radio/si470x/radio-si470x-i2c.c104
1 files changed, 49 insertions, 55 deletions
diff --git a/drivers/media/radio/si470x/radio-si470x-i2c.c b/drivers/media/radio/si470x/radio-si470x-i2c.c
index 9751ea1d80be..3932a449a1b1 100644
--- a/drivers/media/radio/si470x/radio-si470x-i2c.c
+++ b/drivers/media/radio/si470x/radio-si470x-i2c.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* drivers/media/radio/si470x/radio-si470x-i2c.c
*
@@ -5,22 +6,12 @@
*
* Copyright (c) 2009 Samsung Electronics Co.Ltd
* Author: Joonyoung Shim <jy0922.shim@samsung.com>
- *
- * 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.
*/
/* driver definitions */
-#define DRIVER_AUTHOR "Joonyoung Shim <jy0922.shim@samsung.com>";
-#define DRIVER_CARD "Silicon Labs Si470x FM Radio Receiver"
+#define DRIVER_AUTHOR "Joonyoung Shim <jy0922.shim@samsung.com>"
+#define DRIVER_CARD "Silicon Labs Si470x FM Radio"
#define DRIVER_DESC "I2C radio driver for Si470x FM Radio Receivers"
#define DRIVER_VERSION "1.0.2"
@@ -28,6 +19,7 @@
#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
#include <linux/interrupt.h>
#include "radio-si470x.h"
@@ -36,7 +28,7 @@
/* I2C Device ID List */
static const struct i2c_device_id si470x_i2c_id[] = {
/* Generic Entry */
- { "si470x", 0 },
+ { "si470x" },
/* Terminating entry */
{ }
};
@@ -231,10 +223,6 @@ static int si470x_vidioc_querycap(struct file *file, void *priv,
{
strscpy(capability->driver, DRIVER_NAME, sizeof(capability->driver));
strscpy(capability->card, DRIVER_CARD, sizeof(capability->card));
- capability->device_caps = V4L2_CAP_HW_FREQ_SEEK | V4L2_CAP_READWRITE |
- V4L2_CAP_TUNER | V4L2_CAP_RADIO | V4L2_CAP_RDS_CAPTURE;
- capability->capabilities = capability->device_caps | V4L2_CAP_DEVICE_CAPS;
-
return 0;
}
@@ -342,15 +330,13 @@ end:
/*
* si470x_i2c_probe - probe for the device
*/
-static int si470x_i2c_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
+static int si470x_i2c_probe(struct i2c_client *client)
{
struct si470x_device *radio;
int retval = 0;
- unsigned char version_warning = 0;
/* private data allocation and initialization */
- radio = kzalloc(sizeof(struct si470x_device), GFP_KERNEL);
+ radio = devm_kzalloc(&client->dev, sizeof(*radio), GFP_KERNEL);
if (!radio) {
retval = -ENOMEM;
goto err_initial;
@@ -370,7 +356,7 @@ static int si470x_i2c_probe(struct i2c_client *client,
retval = v4l2_device_register(&client->dev, &radio->v4l2_dev);
if (retval < 0) {
dev_err(&client->dev, "couldn't register v4l2_device\n");
- goto err_radio;
+ goto err_initial;
}
v4l2_ctrl_handler_init(&radio->hdl, 2);
@@ -381,7 +367,7 @@ static int si470x_i2c_probe(struct i2c_client *client,
if (radio->hdl.error) {
retval = radio->hdl.error;
dev_err(&client->dev, "couldn't register control\n");
- goto err_dev;
+ goto err_all;
}
/* video device initialization */
@@ -390,39 +376,43 @@ static int si470x_i2c_probe(struct i2c_client *client,
radio->videodev.lock = &radio->lock;
radio->videodev.v4l2_dev = &radio->v4l2_dev;
radio->videodev.release = video_device_release_empty;
+ radio->videodev.device_caps =
+ V4L2_CAP_HW_FREQ_SEEK | V4L2_CAP_READWRITE | V4L2_CAP_TUNER |
+ V4L2_CAP_RADIO | V4L2_CAP_RDS_CAPTURE;
video_set_drvdata(&radio->videodev, radio);
+ radio->gpio_reset = devm_gpiod_get_optional(&client->dev, "reset",
+ GPIOD_OUT_LOW);
+ if (IS_ERR(radio->gpio_reset)) {
+ retval = PTR_ERR(radio->gpio_reset);
+ dev_err(&client->dev, "Failed to request gpio: %d\n", retval);
+ goto err_all;
+ }
+
+ if (radio->gpio_reset)
+ gpiod_set_value(radio->gpio_reset, 1);
+
/* power up : need 110ms */
radio->registers[POWERCFG] = POWERCFG_ENABLE;
if (si470x_set_register(radio, POWERCFG) < 0) {
retval = -EIO;
- goto err_ctrl;
+ goto err_all;
}
msleep(110);
/* get device and chip versions */
if (si470x_get_all_registers(radio) < 0) {
retval = -EIO;
- goto err_ctrl;
+ goto err_all;
}
dev_info(&client->dev, "DeviceID=0x%4.4hx ChipID=0x%4.4hx\n",
radio->registers[DEVICEID], radio->registers[SI_CHIPID]);
if ((radio->registers[SI_CHIPID] & SI_CHIPID_FIRMWARE) < RADIO_FW_VERSION) {
dev_warn(&client->dev,
- "This driver is known to work with firmware version %hu,\n",
- RADIO_FW_VERSION);
- dev_warn(&client->dev,
- "but the device has firmware version %hu.\n",
+ "This driver is known to work with firmware version %u, but the device has firmware version %u.\n"
+ "If you have some trouble using this driver, please report to V4L ML at linux-media@vger.kernel.org\n",
+ RADIO_FW_VERSION,
radio->registers[SI_CHIPID] & SI_CHIPID_FIRMWARE);
- version_warning = 1;
- }
-
- /* give out version warning */
- if (version_warning == 1) {
- dev_warn(&client->dev,
- "If you have some trouble using this driver,\n");
- dev_warn(&client->dev,
- "please report to V4L ML at linux-media@vger.kernel.org\n");
}
/* set initial frequency */
@@ -430,10 +420,10 @@ static int si470x_i2c_probe(struct i2c_client *client,
/* rds buffer allocation */
radio->buf_size = rds_buf * 3;
- radio->buffer = kmalloc(radio->buf_size, GFP_KERNEL);
+ radio->buffer = devm_kmalloc(&client->dev, radio->buf_size, GFP_KERNEL);
if (!radio->buffer) {
retval = -EIO;
- goto err_ctrl;
+ goto err_all;
}
/* rds buffer configuration */
@@ -441,12 +431,13 @@ static int si470x_i2c_probe(struct i2c_client *client,
radio->rd_index = 0;
init_waitqueue_head(&radio->read_queue);
- retval = request_threaded_irq(client->irq, NULL, si470x_i2c_interrupt,
- IRQF_TRIGGER_FALLING | IRQF_ONESHOT, DRIVER_NAME,
- radio);
+ retval = devm_request_threaded_irq(&client->dev, client->irq, NULL,
+ si470x_i2c_interrupt,
+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+ DRIVER_NAME, radio);
if (retval) {
dev_err(&client->dev, "Failed to register interrupt\n");
- goto err_rds;
+ goto err_all;
}
/* register video device */
@@ -460,15 +451,8 @@ static int si470x_i2c_probe(struct i2c_client *client,
return 0;
err_all:
- free_irq(client->irq, radio);
-err_rds:
- kfree(radio->buffer);
-err_ctrl:
v4l2_ctrl_handler_free(&radio->hdl);
-err_dev:
v4l2_device_unregister(&radio->v4l2_dev);
-err_radio:
- kfree(radio);
err_initial:
return retval;
}
@@ -477,15 +461,17 @@ err_initial:
/*
* si470x_i2c_remove - remove the device
*/
-static int si470x_i2c_remove(struct i2c_client *client)
+static void si470x_i2c_remove(struct i2c_client *client)
{
struct si470x_device *radio = i2c_get_clientdata(client);
- free_irq(client->irq, radio);
video_unregister_device(&radio->videodev);
- kfree(radio);
- return 0;
+ if (radio->gpio_reset)
+ gpiod_set_value(radio->gpio_reset, 0);
+
+ v4l2_ctrl_handler_free(&radio->hdl);
+ v4l2_device_unregister(&radio->v4l2_dev);
}
@@ -527,6 +513,13 @@ static int si470x_i2c_resume(struct device *dev)
static SIMPLE_DEV_PM_OPS(si470x_i2c_pm, si470x_i2c_suspend, si470x_i2c_resume);
#endif
+#if IS_ENABLED(CONFIG_OF)
+static const struct of_device_id si470x_of_match[] = {
+ { .compatible = "silabs,si470x" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, si470x_of_match);
+#endif
/*
* si470x_i2c_driver - i2c driver interface
@@ -534,6 +527,7 @@ static SIMPLE_DEV_PM_OPS(si470x_i2c_pm, si470x_i2c_suspend, si470x_i2c_resume);
static struct i2c_driver si470x_i2c_driver = {
.driver = {
.name = "si470x",
+ .of_match_table = of_match_ptr(si470x_of_match),
#ifdef CONFIG_PM_SLEEP
.pm = &si470x_i2c_pm,
#endif
generated by cgit (git 2.34.1) at 2025-12-29 09:51:58 +0000