drivers/media/dvb-frontends/cxd2820r.h
Source file repositories/reference/linux-study-clean/drivers/media/dvb-frontends/cxd2820r.h
File Facts
- System
- Linux kernel
- Corpus path
drivers/media/dvb-frontends/cxd2820r.h- Extension
.h- Size
- 3129 bytes
- Lines
- 129
- Domain
- Driver Families
- Bucket
- drivers/media
- Inferred role
- Driver Families: implementation source
- Status
- source implementation candidate
Why This File Exists
Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
- Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
linux/dvb/frontend.h
Detected Declarations
struct cxd2820r_platform_datastruct cxd2820r_config
Annotated Snippet
struct cxd2820r_platform_data {
u8 ts_mode;
bool ts_clk_inv;
bool if_agc_polarity;
bool spec_inv;
int **gpio_chip_base;
struct dvb_frontend* (*get_dvb_frontend)(struct i2c_client *);
/* private: For legacy media attach wrapper. Do not set value. */
bool attach_in_use;
};
/**
* struct cxd2820r_config - configuration for cxd2020r demod
*
* @i2c_address: Demodulator I2C address. Driver determines DVB-C slave I2C
* address automatically from master address.
* Default: none, must set. Values: 0x6c, 0x6d.
* @ts_mode: TS output mode. Default: none, must set. Values: FIXME?
* @ts_clock_inv: TS clock inverted. Default: 0. Values: 0, 1.
* @if_agc_polarity: Default: 0. Values: 0, 1
* @spec_inv: Spectrum inversion. Default: 0. Values: 0, 1.
*/
struct cxd2820r_config {
/* Demodulator I2C address.
* Driver determines DVB-C slave I2C address automatically from master
* address.
* Default: none, must set
* Values: 0x6c, 0x6d
*/
u8 i2c_address;
/* TS output mode.
* Default: none, must set.
* Values:
*/
u8 ts_mode;
/* TS clock inverted.
* Default: 0
* Values: 0, 1
*/
bool ts_clock_inv;
/* IF AGC polarity.
* Default: 0
* Values: 0, 1
*/
bool if_agc_polarity;
/* Spectrum inversion.
* Default: 0
* Values: 0, 1
*/
bool spec_inv;
};
#if IS_REACHABLE(CONFIG_DVB_CXD2820R)
/**
* cxd2820r_attach - Attach a cxd2820r demod
*
* @config: pointer to &struct cxd2820r_config with demod configuration.
* @i2c: i2c adapter to use.
* @gpio_chip_base: if zero, disables GPIO setting. Otherwise, if
* CONFIG_GPIOLIB is set dynamically allocate
* gpio base; if is not set, use its value to
* setup the GPIO pins.
*
* return: FE pointer on success, NULL on failure.
*/
extern struct dvb_frontend *cxd2820r_attach(
const struct cxd2820r_config *config,
struct i2c_adapter *i2c,
int *gpio_chip_base
);
#else
static inline struct dvb_frontend *cxd2820r_attach(
const struct cxd2820r_config *config,
struct i2c_adapter *i2c,
int *gpio_chip_base
)
{
printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
return NULL;
}
#endif
#endif /* CXD2820R_H */
Annotation
- Immediate include surface: `linux/dvb/frontend.h`.
- Detected declarations: `struct cxd2820r_platform_data`, `struct cxd2820r_config`.
- Atlas domain: Driver Families / drivers/media.
- Implementation status: source implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.