linux-toradex.git/drivers/mmc/core/sdio.c, branch v5.0

mmc: core: Drop the unused mmc_power_save|restore_host()

2018-07-16T09:21:45+00:00

The last user of mmc_power_save|restore_host() APIs is gone, hence let's
drop them. Drop also the corresponding bus_ops callback,
->power_save|restore() as those becomes redundant.

Cc: Tony Lindgren 
Cc: Eyal Reizer 
Signed-off-by: Ulf Hansson

mmc: core: Implement ->sw_reset bus ops for SDIO

2018-05-08T07:33:56+00:00

Let's implement the ->sw_reset() bus ops to allow SDIO func drivers, in
particular, to make a SW reset without doing a full power cycle of the SDIO
card.

Signed-off-by: Ulf Hansson 
Tested-by: Quentin Schulz 
Reviewed-by: Shawn Lin

mmc: core: Rename ->reset() bus ops to ->hw_reset()

2018-05-08T07:33:29+00:00

The bus ops ->reset() executes a full HW reset of the card, as the calling
function mmc_hw_reset() also indicates by its name. Let's convert to follow
the similar names, for both the bus ops callback and for the corresponding
bus ops functions, as to clarify the purpose of code.

Signed-off-by: Ulf Hansson 
Tested-by: Quentin Schulz 
Reviewed-by: Shawn Lin

mmc: core: Re-factor some code for SDIO re-initialization

2018-05-08T07:32:36+00:00

The mmc_sdio_init_card() function has a couple of callers. In the
re-initialization cases, some additional reset commands are issued before
mmc_sdio_init_card() is called. As these additional reset commands are the
same, let's move these into a new static function, mmc_sdio_reinit_card()
and call mmc_sdio_init_card() from there. In this way we avoid the open
coding.

Signed-off-by: Ulf Hansson 
Tested-by: Quentin Schulz 
Reviewed-by: Shawn Lin

mmc: core: Add capability to avoid 3.3V signaling

2018-05-02T13:08:44+00:00

Some SD host controllers cannot handle extended use of 3.3V signaling.
To accommodate these controllers, add a capability that requires us to
negotiate the voltage down from 3.3V during card initialization.

Signed-off-by: Kyle Roeschley 
Signed-off-by: Jennifer Dahm 
Signed-off-by: Ulf Hansson

mmc: core: Add a new quirk for limiting clock rate

2018-05-02T13:08:39+00:00

This patch adds a quirk to limit clock rate which
can be used to reduce the SDIO clock rate for some
chips with broken UHS.

Signed-off-by: Harish Jenny K N 
Reviewed-by: Shawn Lin 
Signed-off-by: Ulf Hansson

mmc: sdio: Check the return value of sdio_enable_4bit_bus

2018-03-15T08:32:30+00:00

Since we could move card->host->caps & MMC_CAP_4_BIT_DATA
ahead of mmc_sdio_init_uhs_card, in mmc_host_uhs(). So there
we could save this bit to check that. Also, if the process of
sdio_enable_4bit_bus goes wrong, we should bails out early.

Signed-off-by: Shawn Lin 
Signed-off-by: Ulf Hansson

mmc: sdio: Keep card runtime resumed while adding function devices

2017-06-20T08:30:39+00:00

Drivers core will runtime suspend a device with no driver. That means the
SDIO card will be runtime suspended as soon as it is added. It is then
runtime resumed to add each function. That is entirely pointless, so add
pm runtime get/put to keep the SDIO card runtime resumed until the function
devices have been added.

Signed-off-by: Adrian Hunter 
Signed-off-by: Ulf Hansson

mmc: sdio: Tidy error path in mmc_attach_sdio()

2017-06-20T08:30:39+00:00

The error path deletes the device by calling mmc_sdio_remove() which must
be called without the host claimed. Simplify the error path so it does just
that and add a comment about why we don't disable runtime PM.

Signed-off-by: Adrian Hunter 
Signed-off-by: Ulf Hansson

mmc: core: improve the quirks for sdio devices

2017-02-15T10:34:26+00:00

Rename mmc_fixup_methods to sdio_fixup_methods to better
reflect that it's for sdio devices. So we could also pass
on it from sdio card's probe sequence just like what we do
for eMMC and block there.

Signed-off-by: Shawn Lin 
Signed-off-by: Ulf Hansson