xiaomi-sm8450/android_kernel_xiaomi_sm8450
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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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13
drivers/i2c/i2c-core.c
View File

@@ -1768,6 +1768,12 @@ static int __process_new_adapter(struct device_driver *d, void *data)
return i2c_do_add_adapter(to_i2c_driver(d), data);
}
static const struct i2c_lock_operations i2c_adapter_lock_ops = {
.lock_bus = i2c_adapter_lock_bus,
.trylock_bus = i2c_adapter_trylock_bus,
.unlock_bus = i2c_adapter_unlock_bus,
};
static int i2c_register_adapter(struct i2c_adapter *adap)
{
int res = -EINVAL;
@@ -1787,11 +1793,8 @@ static int i2c_register_adapter(struct i2c_adapter *adap)
goto out_list;
}
if (!adap->lock_bus) {
adap->lock_bus = i2c_adapter_lock_bus;
adap->trylock_bus = i2c_adapter_trylock_bus;
adap->unlock_bus = i2c_adapter_unlock_bus;
}
if (!adap->lock_ops)
adap->lock_ops = &i2c_adapter_lock_ops;
rt_mutex_init(&adap->bus_lock);
rt_mutex_init(&adap->mux_lock);

25
drivers/i2c/i2c-mux.c
View File

@@ -267,6 +267,18 @@ struct i2c_mux_core *i2c_mux_alloc(struct i2c_adapter *parent,
}
EXPORT_SYMBOL_GPL(i2c_mux_alloc);
static const struct i2c_lock_operations i2c_mux_lock_ops = {
.lock_bus = i2c_mux_lock_bus,
.trylock_bus = i2c_mux_trylock_bus,
.unlock_bus = i2c_mux_unlock_bus,
};
static const struct i2c_lock_operations i2c_parent_lock_ops = {
.lock_bus = i2c_parent_lock_bus,
.trylock_bus = i2c_parent_trylock_bus,
.unlock_bus = i2c_parent_unlock_bus,
};
int i2c_mux_add_adapter(struct i2c_mux_core *muxc,
u32 force_nr, u32 chan_id,
unsigned int class)
@@ -316,15 +328,10 @@ int i2c_mux_add_adapter(struct i2c_mux_core *muxc,
priv->adap.retries = parent->retries;
priv->adap.timeout = parent->timeout;
priv->adap.quirks = parent->quirks;
if (muxc->mux_locked) {
priv->adap.lock_bus = i2c_mux_lock_bus;
priv->adap.trylock_bus = i2c_mux_trylock_bus;
priv->adap.unlock_bus = i2c_mux_unlock_bus;
} else {
priv->adap.lock_bus = i2c_parent_lock_bus;
priv->adap.trylock_bus = i2c_parent_trylock_bus;
priv->adap.unlock_bus = i2c_parent_unlock_bus;
}
if (muxc->mux_locked)
priv->adap.lock_ops = &i2c_mux_lock_ops;
else
priv->adap.lock_ops = &i2c_parent_lock_ops;
/* Sanity check on class */
if (i2c_mux_parent_classes(parent) & class)