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authorThierry Reding <thierry.reding@avionic-design.de>2012-03-26 08:42:48 +0200
committerThierry Reding <thierry.reding@avionic-design.de>2012-06-15 12:56:53 +0200
commit8138d2ddbcca2a100482dac390133f83c5a60f94 (patch)
tree814645a7608376af451f9721dd3da585a87bbdd6 /include/linux/pwm.h
parent62099abf67a20cfb98d4c031fb1925e10a78ee1b (diff)
pwm: Add table-based lookup for static mappings
In order to get rid of the global namespace for PWM devices, this commit provides an alternative method, similar to that of the regulator or clock frameworks, for registering a static mapping for PWM devices. This works by providing a table with a provider/consumer map in the board setup code. With the new pwm_get() and pwm_put() functions available, usage of pwm_request() and pwm_free() becomes deprecated. Reviewed-by: Shawn Guo <shawn.guo@linaro.org> Reviewed-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Diffstat (limited to 'include/linux/pwm.h')
-rw-r--r--include/linux/pwm.h22
1 files changed, 22 insertions, 0 deletions
diff --git a/include/linux/pwm.h b/include/linux/pwm.h
index 047cd5351a3..2947a4fea6a 100644
--- a/include/linux/pwm.h
+++ b/include/linux/pwm.h
@@ -115,6 +115,28 @@ int pwmchip_remove(struct pwm_chip *chip);
struct pwm_device *pwm_request_from_chip(struct pwm_chip *chip,
unsigned int index,
const char *label);
+
+struct pwm_device *pwm_get(struct device *dev, const char *consumer);
+void pwm_put(struct pwm_device *pwm);
+
+struct pwm_lookup {
+ struct list_head list;
+ const char *provider;
+ unsigned int index;
+ const char *dev_id;
+ const char *con_id;
+};
+
+#define PWM_LOOKUP(_provider, _index, _dev_id, _con_id) \
+ { \
+ .provider = _provider, \
+ .index = _index, \
+ .dev_id = _dev_id, \
+ .con_id = _con_id, \
+ }
+
+void pwm_add_table(struct pwm_lookup *table, size_t num);
+
#endif
#endif /* __LINUX_PWM_H */