On Wed, Jun 15, 2022 at 05:20:18PM +0000, Prashant Malani wrote:
> There are some drivers that can use the Type C mux API, but don't have
> to. Introduce CONFIG guards for the mux functions so that drivers can
> include the header file and not run into compilation errors on systems
> which don't have CONFIG_TYPEC enabled. When CONFIG_TYPEC is not enabled,
> the Type C mux functions will be stub versions of the original calls.
>
> Reported-by: kernel test robot <lkp@xxxxxxxxx>
> Reviewed-by: Nícolas F. R. A. Prado <nfraprado@xxxxxxxxxxxxx>
> Tested-by: Nícolas F. R. A. Prado <nfraprado@xxxxxxxxxxxxx>
> Signed-off-by: Prashant Malani <pmalani@xxxxxxxxxxxx>
Reviewed-by: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx>
> ---
>
> Changes since v3:
> - No changes.
>
> Changes since v2:
> - Fix up return types for some of the stubs. Remove 1 unnecessary stub
> in the else condition.
> - Remove unnecessary IS_MODULE config guard.
> - Added Reviewed-by and Tested-by tags.
>
> Changes since v1:
> - Added static inline to stub functions.
> - Updated function signature of stub functions from "struct typec_mux"
> to "struct typec_mux_dev" in accordance with updates from commit
> 713fd49b430c ("usb: typec: mux: Introduce indirection")
>
> include/linux/usb/typec_mux.h | 44 ++++++++++++++++++++++++++++++-----
> 1 file changed, 38 insertions(+), 6 deletions(-)
>
> diff --git a/include/linux/usb/typec_mux.h b/include/linux/usb/typec_mux.h
> index ee57781dcf28..9292f0e07846 100644
> --- a/include/linux/usb/typec_mux.h
> +++ b/include/linux/usb/typec_mux.h
> @@ -58,17 +58,13 @@ struct typec_mux_desc {
> void *drvdata;
> };
>
> +#if IS_ENABLED(CONFIG_TYPEC)
> +
> struct typec_mux *fwnode_typec_mux_get(struct fwnode_handle *fwnode,
> const struct typec_altmode_desc *desc);
> void typec_mux_put(struct typec_mux *mux);
> int typec_mux_set(struct typec_mux *mux, struct typec_mux_state *state);
>
> -static inline struct typec_mux *
> -typec_mux_get(struct device *dev, const struct typec_altmode_desc *desc)
> -{
> - return fwnode_typec_mux_get(dev_fwnode(dev), desc);
> -}
> -
> struct typec_mux_dev *
> typec_mux_register(struct device *parent, const struct typec_mux_desc *desc);
> void typec_mux_unregister(struct typec_mux_dev *mux);
> @@ -76,4 +72,40 @@ void typec_mux_unregister(struct typec_mux_dev *mux);
> void typec_mux_set_drvdata(struct typec_mux_dev *mux, void *data);
> void *typec_mux_get_drvdata(struct typec_mux_dev *mux);
>
> +#else
> +
> +static inline struct typec_mux *fwnode_typec_mux_get(struct fwnode_handle *fwnode,
> + const struct typec_altmode_desc *desc)
> +{
> + return NULL;
> +}
> +
> +static inline void typec_mux_put(struct typec_mux *mux) {}
> +
> +static inline int typec_mux_set(struct typec_mux *mux, struct typec_mux_state *state)
> +{
> + return 0;
> +}
> +
> +static inline struct typec_mux_dev *
> +typec_mux_register(struct device *parent, const struct typec_mux_desc *desc)
> +{
> + return ERR_PTR(-EOPNOTSUPP);
> +}
> +static inline void typec_mux_unregister(struct typec_mux_dev *mux) {}
> +
> +static inline void typec_mux_set_drvdata(struct typec_mux_dev *mux, void *data) {}
> +static inline void *typec_mux_get_drvdata(struct typec_mux_dev *mux)
> +{
> + return ERR_PTR(-EOPNOTSUPP);
> +}
> +
> +#endif /* CONFIG_TYPEC */
> +
> +static inline struct typec_mux *
> +typec_mux_get(struct device *dev, const struct typec_altmode_desc *desc)
> +{
> + return fwnode_typec_mux_get(dev_fwnode(dev), desc);
> +}
> +
> #endif /* __USB_TYPEC_MUX */
> --
> 2.36.1.476.g0c4daa206d-goog
--
heikki
