bus: mhi: core: Expose mhi_get_exec_env() API for controllers

The mhi_get_exec_env() APIs can be used by the controller drivers
to query the execution environment of the MHI device. Expose it
so it can be used in some scenarios to determine behavior of
controllers.
Signed-off-by: NBhaumik Bhatt <bbhatt@codeaurora.org>
Reviewed-by: NManivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: NManivannan Sadhasivam <manivannan.sadhasivam@linaro.org>

drivers/bus/mhi/core/internal.h

@@ -609,7 +609,6 @@ enum mhi_pm_state __must_check mhi_tryset_pm_state(
 					struct mhi_controller *mhi_cntrl,
 					enum mhi_pm_state state);
 const char *to_mhi_pm_state_str(enum mhi_pm_state state);
-enum mhi_ee_type mhi_get_exec_env(struct mhi_controller *mhi_cntrl);
 int mhi_queue_state_transition(struct mhi_controller *mhi_cntrl,
 			       enum dev_st_transition state);
 void mhi_pm_st_worker(struct work_struct *work);

drivers/bus/mhi/core/main.c

@@ -123,6 +123,7 @@ enum mhi_ee_type mhi_get_exec_env(struct mhi_controller *mhi_cntrl)
 
 	return (ret) ? MHI_EE_MAX : exec;
 }
+EXPORT_SYMBOL_GPL(mhi_get_exec_env);
 
 enum mhi_state mhi_get_mhi_state(struct mhi_controller *mhi_cntrl)
 {

include/linux/mhi.h

@@ -658,6 +658,12 @@ int mhi_download_rddm_img(struct mhi_controller *mhi_cntrl, bool in_panic);
  */
 int mhi_force_rddm_mode(struct mhi_controller *mhi_cntrl);
 
+/**
+ * mhi_get_exec_env - Get BHI execution environment of the device
+ * @mhi_cntrl: MHI controller
+ */
+enum mhi_ee_type mhi_get_exec_env(struct mhi_controller *mhi_cntrl);
+
 /**
  * mhi_get_mhi_state - Get MHI state of the device
  * @mhi_cntrl: MHI controller