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| author | Ahmad Fatoum <ahmad@a3f.at> | 2019-11-21 09:40:03 +0100 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2019-12-05 09:10:25 +0100 |
| commit | 713a601bde07bb498f99bc6288d0c10ddcbe2e0a (patch) | |
| tree | ce744fd0bd48e2471a8367450d1d1995fc801c7a /include | |
| parent | 1d86578493aaddf04672731275e5e2df0f2dda94 (diff) | |
| download | barebox-713a601bde07bb498f99bc6288d0c10ddcbe2e0a.tar.gz barebox-713a601bde07bb498f99bc6288d0c10ddcbe2e0a.tar.xz | |
param: add dev_add_param_tristate(_ro) helpers
This is can be considered an extension to the dev_add_param_bool
interfaces with a third value that's "unknown".
This can be used for cases, where barebox can flip a bit somewhere,
but it has no way of knowing what the initial state of the bit was,
e.g. turn on/off the watchdog, but no watchdog status.
Turn on/off a co-processor, but no co-processor online status.
And so on. Not providing a way to customize the "unknown" string
is a deliberate choice, so future device parameters follow the same
naming scheme.
Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'include')
| -rw-r--r-- | include/param.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/include/param.h b/include/param.h index 4ac502e726..d75f50ea3e 100644 --- a/include/param.h +++ b/include/param.h @@ -63,6 +63,16 @@ struct param_d *dev_add_param_enum(struct device_d *dev, const char *name, int (*get)(struct param_d *p, void *priv), int *value, const char * const *names, int max, void *priv); +enum param_tristate { PARAM_TRISTATE_UNKNOWN, PARAM_TRISTATE_TRUE, PARAM_TRISTATE_FALSE }; + +struct param_d *dev_add_param_tristate(struct device_d *dev, const char *name, + int (*set)(struct param_d *p, void *priv), + int (*get)(struct param_d *p, void *priv), + int *value, void *priv); + +struct param_d *dev_add_param_tristate_ro(struct device_d *dev, const char *name, + int *value); + struct param_d *dev_add_param_bitmask(struct device_d *dev, const char *name, int (*set)(struct param_d *p, void *priv), int (*get)(struct param_d *p, void *priv), @@ -144,6 +154,20 @@ static inline struct param_d *dev_add_param_bitmask(struct device_d *dev, const return ERR_PTR(-ENOSYS); } +static inline struct param_d *dev_add_param_tristate(struct device_d *dev, const char *name, + int (*set)(struct param_d *p, void *priv), + int (*get)(struct param_d *p, void *priv), + int *value, void *priv) +{ + return ERR_PTR(-ENOSYS); +} + +static inline struct param_d *dev_add_param_tristate_ro(struct device_d *dev, const char *name, + int *value) +{ + return ERR_PTR(-ENOSYS); +} + static inline struct param_d *dev_add_param_ip(struct device_d *dev, const char *name, int (*set)(struct param_d *p, void *priv), int (*get)(struct param_d *p, void *priv), |