[PATCH v3 0/7] mmc: sunxi: Add runtime PM support

Maxime Ripard
2018-04-16T14:22:58Z

Hi,

Since it's introduction, our MMC controller has had its external clocks
running all the time.

While that was working great, the power usage and most importantly the EMI
that it generated was pretty bad.

Let's implement some runtime_pm hooks with an autosuspend to shut down the
whole block when the MMC is not active.

However, some SDIO devices will not probe properly if we keep shutting down
the controller, so the autosuspend is disabled for the SDIO devices.

Let me know what you think,
Maxime

Changes from v2:
- Dropped the patches already applied
- Do not power up or down the card during a runtime_resume or
runtime_suspend, but only take care of the controller
- In order to do the above, split the set_ios function into smaller
chunks that can be called from set_ios and our runtime_resume hook

Changes from v1:
- Disable entirely the controller
- Made sure the driver would work with CONFIG_PM off
- Fixed an issue with the SDIO devices
- Rebased on top of 4.16

Maxime Ripard (7):
mmc: sunxi: Reorder the headers
mmc: sunxi: Change sunxi_mmc_init_host argument type
mmc: sunxi: Move bus width configuration to a function
mmc: sunxi: Move clock configuration to a function
mmc: sunxi: Move the card power configuration to a function
mmc: sunxi: Add runtime_pm support
mmc: sunxi: Drop the init / reset of the controller from set_ios

drivers/mmc/host/sunxi-mmc.c | 185 +++++++++++++++++++++++-------------
1 file changed, 122 insertions(+), 63 deletions(-)

base-commit: 60cc43fc888428bb2f18f08997432d426a243338
--
git-series 0.9.1