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23d89aa0c2
In order to save power, we only need to request a channel when the communication with the DSP active. For this we export the following functions: - imx_dsp_request_channel, gets a channel with a given index - imx_dsp_free_channel, frees a channel with a given index Notice that we still request channels at probe to support devices that do not have PM callbacks implemented. More explanations about why requesting a channel has an effect on power savings: - requesting an mailbox channel will call mailbox's startup function. - startup function calls pm_runtime_get_sync which increments device usage count and will keep the device active. Specifically, mailbox clock will be always ON when a mailbox channel is requested. Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com> Reviewed-by: Paul Olaru <paul.olaru@nxp.com> Signed-off-by: Shawn Guo <shawnguo@kernel.org> |
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| .. | ||
| imx-dsp.c | ||
| imx-scu-irq.c | ||
| imx-scu-soc.c | ||
| imx-scu.c | ||
| Kconfig | ||
| Makefile | ||
| misc.c | ||
| rm.c | ||
| scu-pd.c | ||