Merge "drivers: of: Add API to find ddr device type"

#include <linux/types.h>

#include <linux/init.h>

#include <linux/errno.h>

#include <linux/libfdt.h>

/* Definitions used by the flattened device tree */

#define OF_DT_HEADER		0xd00dfeed	/* marker */

/* Other Prototypes */

extern u64 of_flat_dt_translate_address(unsigned long node);

extern void of_fdt_limit_memory(int limit);

/**

 * of_fdt_get_ddrtype - Return the type of ddr (4/5) on the current device

 *

 * On match, returns a non-zero positive value which matches the ddr type.

 * Otherwise returns -ENOENT.

 */

static inline int of_fdt_get_ddrtype(void)

{

	int memory;

	int len;

	int ret;

	fdt32_t *prop = NULL;

	memory = fdt_path_offset(initial_boot_params, "/memory");

	if (memory > 0)

		prop = fdt_getprop_w(initial_boot_params, memory,

				  "ddr_device_type", &len);

	if (!prop || len != sizeof(u32))

		return -ENOENT;

	ret = fdt32_to_cpu(*prop);

	return ret;

}

#endif /* CONFIG_OF_FLATTREE */

#ifdef CONFIG_OF_EARLY_FLATTREE