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Tested-by: Aswath Govindraju Signed-off-by: Peter Rosin --- drivers/mux/core.c | 41 ++++++++++++++++++++++++++---------- include/linux/mux/consumer.h | 1 + 2 files changed, 31 insertions(+), 11 deletions(-) diff --git a/drivers/mux/core.c b/drivers/mux/core.c index 7d38e7c0c02e..90073ce01539 100644 --- a/drivers/mux/core.c +++ b/drivers/mux/core.c @@ -673,6 +673,33 @@ struct mux_control *devm_mux_control_get(struct device *dev, } EXPORT_SYMBOL_GPL(devm_mux_control_get); +/** + * mux_state_get() - Get the mux-state for a device. + * @dev: The device that needs a mux-state. + * @mux_name: The name identifying the mux-state. + * + * Return: A pointer to the mux-state, or an ERR_PTR with a negative errno. + */ +struct mux_state *mux_state_get(struct device *dev, const char *mux_name) +{ + struct mux_state *mstate; + + mstate = kzalloc(sizeof(*mstate), GFP_KERNEL); + if (!mstate) + return ERR_PTR(-ENOMEM); + + mstate->mux = mux_get(dev, mux_name, &mstate->state); + if (IS_ERR(mstate->mux)) { + int err = PTR_ERR(mstate->mux); + + kfree(mstate); + return ERR_PTR(err); + } + + return mstate; +} +EXPORT_SYMBOL_GPL(mux_state_get); + /** * mux_state_put() - Put away the mux-state for good. * @mstate: The mux-state to put away. @@ -705,25 +732,17 @@ struct mux_state *devm_mux_state_get(struct device *dev, const char *mux_name) { struct mux_state **ptr, *mstate; - struct mux_control *mux_ctrl; - int state; - - mstate = devm_kzalloc(dev, sizeof(struct mux_state), GFP_KERNEL); - if (!mstate) - return ERR_PTR(-ENOMEM); ptr = devres_alloc(devm_mux_state_release, sizeof(*ptr), GFP_KERNEL); if (!ptr) return ERR_PTR(-ENOMEM); - mux_ctrl = mux_get(dev, mux_name, &state); - if (IS_ERR(mux_ctrl)) { + mstate = mux_state_get(dev, mux_name); + if (IS_ERR(mstate)) { devres_free(ptr); - return (struct mux_state *)mux_ctrl; + return mstate; } - mstate->mux = mux_ctrl; - mstate->state = state; *ptr = mstate; devres_add(dev, ptr); diff --git a/include/linux/mux/consumer.h b/include/linux/mux/consumer.h index babf2a744056..944678604549 100644 --- a/include/linux/mux/consumer.h +++ b/include/linux/mux/consumer.h @@ -54,6 +54,7 @@ int mux_control_deselect(struct mux_control *mux); int mux_state_deselect(struct mux_state *mstate); struct mux_control *mux_control_get(struct device *dev, const char *mux_name); +struct mux_state *mux_state_get(struct device *dev, const char *mux_name); void mux_control_put(struct mux_control *mux); void mux_state_put(struct mux_state *mstate); -- 2.20.1