include/linux/mfd/lp3943.h

Source file repositories/reference/linux-study-clean/include/linux/mfd/lp3943.h

File Facts

System
Linux kernel
Corpus path
include/linux/mfd/lp3943.h
Extension
.h
Size
2575 bytes
Lines
110
Domain
Core OS
Bucket
Core Kernel Interface
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

struct lp3943_pwm_map {
	enum lp3943_pwm_output *output;
	int num_outputs;
};

/*
 * struct lp3943_platform_data
 * @pwms: Output channel definitions for PWM channel 0 and 1
 */
struct lp3943_platform_data {
	struct lp3943_pwm_map *pwms[LP3943_NUM_PWMS];
};

/*
 * struct lp3943_reg_cfg
 * @reg: Register address
 * @mask: Register bit mask to be updated
 * @shift: Register bit shift
 */
struct lp3943_reg_cfg {
	u8 reg;
	u8 mask;
	u8 shift;
};

/*
 * struct lp3943
 * @dev: Parent device pointer
 * @regmap: Used for I2C communication on accessing registers
 * @pdata: LP3943 platform specific data
 * @mux_cfg: Register configuration for pin MUX
 * @pin_used: Bit mask for output pin used.
 *	      This bitmask is used for pin assignment management.
 *	      1 = pin used, 0 = available.
 *	      Only LSB 16 bits are used, but it is unsigned long type
 *	      for atomic bitwise operations.
 */
struct lp3943 {
	struct device *dev;
	struct regmap *regmap;
	struct lp3943_platform_data *pdata;
	const struct lp3943_reg_cfg *mux_cfg;
	unsigned long pin_used;
};

int lp3943_read_byte(struct lp3943 *lp3943, u8 reg, u8 *read);
int lp3943_write_byte(struct lp3943 *lp3943, u8 reg, u8 data);
int lp3943_update_bits(struct lp3943 *lp3943, u8 reg, u8 mask, u8 data);
#endif

Annotation

Implementation Notes