include/linux/omap-gpmc.h

Source file repositories/reference/linux-study-clean/include/linux/omap-gpmc.h

File Facts

System
Linux kernel
Corpus path
include/linux/omap-gpmc.h
Extension
.h
Size
2347 bytes
Lines
83
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 gpmc_nand_ops {
	bool (*nand_writebuffer_empty)(void);
};

struct gpmc_nand_regs;

struct gpmc_onenand_info {
	bool sync_read;
	bool sync_write;
	int burst_len;
};

#if IS_ENABLED(CONFIG_OMAP_GPMC)
struct gpmc_nand_ops *gpmc_omap_get_nand_ops(struct gpmc_nand_regs *regs,
					     int cs);
/**
 * gpmc_omap_onenand_set_timings - set optimized sync timings.
 * @cs:      Chip Select Region
 * @freq:    Chip frequency
 * @latency: Burst latency cycle count
 * @info:    Structure describing parameters used
 *
 * Sets optimized timings for the @cs region based on @freq and @latency.
 * Updates the @info structure based on the GPMC settings.
 */
int gpmc_omap_onenand_set_timings(struct device *dev, int cs, int freq,
				  int latency,
				  struct gpmc_onenand_info *info);

#else
static inline struct gpmc_nand_ops *gpmc_omap_get_nand_ops(struct gpmc_nand_regs *regs,
							   int cs)
{
	return NULL;
}

static inline
int gpmc_omap_onenand_set_timings(struct device *dev, int cs, int freq,
				  int latency,
				  struct gpmc_onenand_info *info)
{
	return -EINVAL;
}
#endif /* CONFIG_OMAP_GPMC */

extern int gpmc_calc_timings(struct gpmc_timings *gpmc_t,
			     struct gpmc_settings *gpmc_s,
			     struct gpmc_device_timings *dev_t);

struct device_node;

extern void gpmc_cs_write_reg(int cs, int idx, u32 val);
extern int gpmc_calc_divider(unsigned int sync_clk);
extern int gpmc_cs_set_timings(int cs, const struct gpmc_timings *t,
			       const struct gpmc_settings *s);
extern int gpmc_cs_program_settings(int cs, struct gpmc_settings *p);
extern int gpmc_cs_request(int cs, unsigned long size, unsigned long *base);
extern void gpmc_cs_free(int cs);
extern int gpmc_configure(int cmd, int wval);
extern void gpmc_read_settings_dt(struct device_node *np,
				  struct gpmc_settings *p);

struct gpmc_timings;
struct omap_nand_platform_data;
struct omap_onenand_platform_data;

Annotation

Implementation Notes