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i2c: move locking operations to their own struct

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This makes it trivial to constify them, so do that.

Signed-off-by: Peter Rosin <peda@axentia.se>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Peter Rosin
2016-08-25 23:07:01 +02:00
committed by Wolfram Sang
parent 718917b987
commit d1ed7985b9
4 changed files with 49 additions and 24 deletions
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10
drivers/gpu/drm/drm_dp_helper.c
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@@ -790,6 +790,12 @@ static void unlock_bus(struct i2c_adapter *i2c, unsigned int flags)
mutex_unlock(&i2c_to_aux(i2c)->hw_mutex);
}
static const struct i2c_lock_operations drm_dp_i2c_lock_ops = {
.lock_bus = lock_bus,
.trylock_bus = trylock_bus,
.unlock_bus = unlock_bus,
};
/**
* drm_dp_aux_init() - minimally initialise an aux channel
* @aux: DisplayPort AUX channel
@@ -807,9 +813,7 @@ void drm_dp_aux_init(struct drm_dp_aux *aux)
aux->ddc.algo_data = aux;
aux->ddc.retries = 3;
aux->ddc.lock_bus = lock_bus;
aux->ddc.trylock_bus = trylock_bus;
aux->ddc.unlock_bus = unlock_bus;
aux->ddc.lock_ops = &drm_dp_i2c_lock_ops;
}
EXPORT_SYMBOL(drm_dp_aux_init);