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| author | Wolfram Sang <wsa+renesas@sang-engineering.com> | 2015-03-12 17:17:58 +0100 |
|---|---|---|
| committer | Wolfram Sang <wsa@the-dreams.de> | 2015-03-18 13:36:46 +0100 |
| commit | 351d224f64afc1b3b359a1738b7d4600c7e64061 (patch) | |
| tree | 3cdb8debf2d255b55f0bddc54bafa721551faa89 /include | |
| parent | i2c: designware: Suppress error message if platform_get_irq() < 0 (diff) | |
| download | linux-351d224f64afc1b3b359a1738b7d4600c7e64061.tar.xz linux-351d224f64afc1b3b359a1738b7d4600c7e64061.zip | |
of: base: add function to get highest id of an alias stem
I2C supports adding adapters using either a dynamic or fixed id. The
latter is provided by aliases in the DT case. To prevent id collisions
of those two types, install this function which gives us the highest
fixed id, so we can then let the dynamically created ones come after
this highest number.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/of.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/of.h b/include/linux/of.h index dfde07e77a63..9bfcc18ceab3 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -332,6 +332,7 @@ extern int of_count_phandle_with_args(const struct device_node *np, extern void of_alias_scan(void * (*dt_alloc)(u64 size, u64 align)); extern int of_alias_get_id(struct device_node *np, const char *stem); +extern int of_alias_get_highest_id(const char *stem); extern int of_machine_is_compatible(const char *compat); @@ -594,6 +595,11 @@ static inline int of_alias_get_id(struct device_node *np, const char *stem) return -ENOSYS; } +static inline int of_alias_get_highest_id(const char *stem) +{ + return -ENOSYS; +} + static inline int of_machine_is_compatible(const char *compat) { return 0; |