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drivers: qcom: cmd-db: Report if command DB is initialized as standalone

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The command DB may be initialized outside the AOP, indicated by the
reserved bit 0. Export this information through a function.

Change-Id: I7b8c685cc03d919c5adb1b91134078bd96599bbd
Signed-off-by: Lina Iyer <ilina@codeaurora.org>
This commit is contained in:
Lina Iyer 2017-02-01 13:34:54 -07:00
parent 75afa532e7
commit 8f906946fe
2 changed files with 19 additions and 0 deletions
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14
drivers/soc/qcom/cmd-db.c
View File

@ -16,6 +16,7 @@
#define MAX_SLV_ID 8
#define SLAVE_ID_MASK 0x7
#define SLAVE_ID_SHIFT 16
#define CMD_DB_STANDALONE_MASK BIT(0)
/**
* struct entry_header: header for each entry in cmddb
@ -237,6 +238,16 @@ enum cmd_db_hw_type cmd_db_read_slave_id(const char *id)
}
EXPORT_SYMBOL(cmd_db_read_slave_id);
bool cmd_db_is_standalone(void)
{
int ret = cmd_db_ready();
u32 standalone = le32_to_cpu(cmd_db_header->reserved) &
CMD_DB_STANDALONE_MASK;
return !ret && standalone;
}
EXPORT_SYMBOL(cmd_db_is_standalone);
static int cmd_db_dev_probe(struct platform_device *pdev)
{
struct reserved_mem *rmem;
@ -260,6 +271,9 @@ static int cmd_db_dev_probe(struct platform_device *pdev)
return -EINVAL;
}
if (cmd_db_is_standalone())
pr_info("Command DB is initialized in standalone mode.\n");
return 0;
}

5
include/soc/qcom/cmd-db.h
View File

@ -23,6 +23,8 @@ const void *cmd_db_read_aux_data(const char *resource_id, size_t *len);
enum cmd_db_hw_type cmd_db_read_slave_id(const char *resource_id);
int cmd_db_ready(void);
bool cmd_db_is_standalone(void);
#else
static inline u32 cmd_db_read_addr(const char *resource_id)
{ return 0; }
@ -35,5 +37,8 @@ static inline enum cmd_db_hw_type cmd_db_read_slave_id(const char *resource_id)
static inline int cmd_db_ready(void)
{ return -ENODEV; }
static inline bool cmd_db_is_standalone(void)
{ return false; }
#endif /* CONFIG_QCOM_COMMAND_DB */
#endif /* __QCOM_COMMAND_DB_H__ */