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| author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2023-04-12 13:56:36 +0200 |
|---|---|---|
| committer | Thierry Reding <thierry.reding@gmail.com> | 2023-04-13 14:27:53 +0200 |
| commit | 0af4d704ba8e5ee632b6e65015ffe4d229c1a9a9 (patch) | |
| tree | 41171a79d9ad02b58067acdd5887d26f780358e9 /Documentation/driver-api | |
| parent | 9e4fa80ab7ef9eb4f7b1ea9fc31e0eb040e85e25 (diff) | |
| download | linux-0af4d704ba8e5ee632b6e65015ffe4d229c1a9a9.tar.gz | |
pwm: Delete deprecated functions pwm_request() and pwm_free()
Since commit 5a7fbe452ad9 ("backlight: pwm_bl: Drop support for legacy PWM
probing") the last user of pwm_request() and pwm_free() is gone. So remove
these functions that were deprecated over 10 years ago in commit
8138d2ddbcca ("pwm: Add table-based lookup for static mappings").
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
[thierry.reding@gmail.com: clean up a bit after removal]
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Diffstat (limited to 'Documentation/driver-api')
| -rw-r--r-- | Documentation/driver-api/pwm.rst | 13 |
1 files changed, 5 insertions, 8 deletions
diff --git a/Documentation/driver-api/pwm.rst b/Documentation/driver-api/pwm.rst index 8c71a2055d27..3fdc95f7a1d1 100644 --- a/Documentation/driver-api/pwm.rst +++ b/Documentation/driver-api/pwm.rst @@ -35,12 +35,9 @@ consumers to providers, as given in the following example:: Using PWMs ---------- -Legacy users can request a PWM device using pwm_request() and free it -after usage with pwm_free(). - -New users should use the pwm_get() function and pass to it the consumer -device or a consumer name. pwm_put() is used to free the PWM device. Managed -variants of the getter, devm_pwm_get() and devm_fwnode_pwm_get(), also exist. +Consumers use the pwm_get() function and pass to it the consumer device or a +consumer name. pwm_put() is used to free the PWM device. Managed variants of +the getter, devm_pwm_get() and devm_fwnode_pwm_get(), also exist. After being requested, a PWM has to be configured using:: @@ -165,8 +162,8 @@ consumers should implement it as described in the "Using PWMs" section. Locking ------- -The PWM core list manipulations are protected by a mutex, so pwm_request() -and pwm_free() may not be called from an atomic context. Currently the +The PWM core list manipulations are protected by a mutex, so pwm_get() +and pwm_put() may not be called from an atomic context. Currently the PWM core does not enforce any locking to pwm_enable(), pwm_disable() and pwm_config(), so the calling context is currently driver specific. This is an issue derived from the former barebone API and should be fixed soon. |