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Merge "of: Make of_get_ddrtype module friendly"

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qctecmdr 2019-10-08 19:24:26 -07:00 • committed by Gerrit - the friendly Code Review server
commit f611892041
2 changed files with 24 additions and 26 deletions
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24
include/linux/of.h
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@ -1278,6 +1278,30 @@ static inline int of_get_available_child_count(const struct device_node *np)
return num;
}
/**
* 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 ret;
u32 ddr_type;
struct device_node *mem_node;
mem_node = of_find_node_by_path("/memory");
if (!mem_node)
return -ENOENT;
ret = of_property_read_u32(mem_node, "ddr_device_type", &ddr_type);
of_node_put(mem_node);
if (ret < 0)
return -ENOENT;
return ddr_type;
}
#if defined(CONFIG_OF) && !defined(MODULE)
#define _OF_DECLARE(table, name, compat, fn, fn_type) \
static const struct of_device_id __of_table_##name \

26
include/linux/of_fdt.h
View file

@ -12,7 +12,6 @@
#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 */
@ -40,31 +39,6 @@ extern char __dtb_end[];
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