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bus: mhi: core: Introduce helper function to check device state 

Introduce a helper function to determine whether the device is in a
powered ON state and resides in one of the active MHI states. This will
allow for some use cases where access can be pre-determined.

Reviewed-by: Jeffrey Hugo <jhugo@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20200929175218.8178-8-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Bhaumik Bhatt 2020-09-29 23:22:06 +05:30 committed by Greg Kroah-Hartman
parent 5aa93f0576
commit a6c1fff857
1 changed files with 5 additions and 0 deletions
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5
drivers/bus/mhi/core/internal.h
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@ -598,6 +598,11 @@ int mhi_pm_m3_transition(struct mhi_controller *mhi_cntrl);
int __mhi_device_get_sync(struct mhi_controller *mhi_cntrl); int __mhi_device_get_sync(struct mhi_controller *mhi_cntrl);
int mhi_send_cmd(struct mhi_controller *mhi_cntrl, struct mhi_chan *mhi_chan, int mhi_send_cmd(struct mhi_controller *mhi_cntrl, struct mhi_chan *mhi_chan,
enum mhi_cmd_type cmd); enum mhi_cmd_type cmd);
static inline bool mhi_is_active(struct mhi_controller *mhi_cntrl)
{
return (mhi_cntrl->dev_state >= MHI_STATE_M0 &&
mhi_cntrl->dev_state <= MHI_STATE_M3_FAST);
}
static inline void mhi_trigger_resume(struct mhi_controller *mhi_cntrl) static inline void mhi_trigger_resume(struct mhi_controller *mhi_cntrl)
{ {