From 8138d2ddbcca2a100482dac390133f83c5a60f94 Mon Sep 17 00:00:00 2001 From: Thierry Reding Date: Mon, 26 Mar 2012 08:42:48 +0200 Subject: 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 Reviewed-by: Mark Brown Signed-off-by: Thierry Reding --- include/linux/pwm.h | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) (limited to 'include/linux/pwm.h') diff --git a/include/linux/pwm.h b/include/linux/pwm.h index 047cd5351a3b..2947a4fea6ad 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 */ -- cgit v1.2.3