platform_data/media/si4713.h

0001 /*
0002  * include/linux/platform_data/media/si4713.h
0003  *
0004  * Board related data definitions for Si4713 i2c device driver.
0005  *
0006  * Copyright (c) 2009 Nokia Corporation
0007  * Contact: Eduardo Valentin <eduardo.valentin@nokia.com>
0008  *
0009  * This file is licensed under the terms of the GNU General Public License
0010  * version 2. This program is licensed "as is" without any warranty of any
0011  * kind, whether express or implied.
0012  *
0013  */
0014
0015 #ifndef SI4713_H
0016 #define SI4713_H
0017
0018 /* The SI4713 I2C sensor chip has a fixed slave address of 0xc6 or 0x22. */
0019 #define SI4713_I2C_ADDR_BUSEN_HIGH  0x63
0020 #define SI4713_I2C_ADDR_BUSEN_LOW   0x11
0021
0022 /*
0023  * Platform dependent definition
0024  */
0025 struct si4713_platform_data {
0026     bool is_platform_device;
0027 };
0028
0029 /*
0030  * Structure to query for Received Noise Level (RNL).
0031  */
0032 struct si4713_rnl {
0033     __u32 index;        /* modulator index */
0034     __u32 frequency;    /* frequency to perform rnl measurement */
0035     __s32 rnl;      /* result of measurement in dBuV */
0036     __u32 reserved[4];  /* drivers and apps must init this to 0 */
0037 };
0038
0039 /*
0040  * This is the ioctl number to query for rnl. Users must pass a
0041  * struct si4713_rnl pointer specifying desired frequency in 'frequency' field
0042  * following driver capabilities (i.e V4L2_TUNER_CAP_LOW).
0043  * Driver must return measured value in the same structure, filling 'rnl' field.
0044  */
0045 #define SI4713_IOC_MEASURE_RNL  _IOWR('V', BASE_VIDIOC_PRIVATE + 0, \
0046                         struct si4713_rnl)
0047
0048 #endif /* ifndef SI4713_H*/