Commit Graph

495366 Commits

Author SHA1 Message Date
Vincent Yang
9d967a61b4 mmc: sdhci: add a voltage switch callback function
This patch adds a callback function to do
controller-specific actions when switching voltages.
It is a preparation and will be used by Fujitsu
SDHCI controller f_sdh30 driver.

Signed-off-by: Vincent Yang <Vincent.Yang@tw.fujitsu.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-20 09:29:16 +01:00
Doug Anderson
29d0d161c4 mmc: dw_mmc: Power on vqmmc in MMC_POWER_ON, not MMC_POWER_UP
If we power up vqmmc in MMC_POWER_ON then we end up turning it on
before mmc_power_up() sets the signal voltage.  That's not so great
since we might be powering it up at the wrong voltage.

Note that this is how Yuvaraj originally coded things up in
<https://patchwork.kernel.org/patch/4401231/> but he changed it on my
suggestion.  Apparently I was wrong.

Reported-by: Alexandru M Stan <amstan@chromium.org>
Signed-off-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:33 +01:00
Mohammad Jamal
c63705e185 mmc: host: sdhci: Added a space before (
This patch solves the coding style issue by adding a space
before (

Signed-off-by: Mohammad Jamal <md.jamalmohiuddin@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:32 +01:00
Jisheng Zhang
20f1f2d7d4 mmc: sdhci-pxav3: fix pm unbalanced issue in -> remove()
This patch calls pm_runtime_put_noidle() to restore the device's usage
counter in the ->remove() implementation.

Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:32 +01:00
Jisheng Zhang
62cf983ad8 mmc: sdhci-pxav3: fix unbalanced clock issues during probe
Commit 0dcaa2499b ("sdhci-pxav3: Fix runtime PM initialization") tries
to fix one hang issue caused by calling sdhci_add_host() on a suspended
device. The fix enables the clock twice, once by clk_prepare_enable() and
another by pm_runtime_get_sync(), meaning that the clock will never be
gated at runtime PM suspend. I observed the power consumption regression on
Marvell BG2Q SoCs.

In fact, the fix is not correct. There still be a very small window
during which a runtime suspend might somehow occur after pm_runtime_enable()
but before pm_runtime_get_sync().

This patch fixes all of the two problems by just incrementing the usage
counter before pm_runtime_enable(). It also adjust the order of disabling
runtime pm and storing the usage count in the error path to handle clock
gating properly.

Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Cc: <stable@vger.kernel.org> # v3.11+
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:31 +01:00
Adrian Hunter
250fb7b450 mmc: sdhci: Always init buf_ready_int
There is no point making the initialization
of buf_ready_int conditional on host version.
Simplify by just doing it always. Note that
the other conditional initializations will be
removed when the new way of doing re-tuning
is taken into use.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:31 +01:00
Adrian Hunter
f100c1c2b5 mmc: core: Move mmc_card_removed() into mmc_start_request()
Both callers of mmc_start_request() call mmc_card_removed()
so move that call into mmc_start_request().

This patch is preparation for adding re-tuning support.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:30 +01:00
Adrian Hunter
63e415c640 mmc: core: Simplify by adding mmc_execute_tuning()
For each MMC, SD and SDIO there is code that
holds the clock, calls ops->execute_tuning, and
releases the clock. Simplify the code a bit by
providing a separate function to do that.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:30 +01:00
NeilBrown
fdb9de129e mmc: omap_hsmmc: use mmc_of_parse to parse common mmc configuration.
This ensures that all standard options are available to hsmmc,
In particular, I need cap-power-off-card.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:29 +01:00
NeilBrown
41afa31419 mmc: omap_hsmmc: use slot-gpio library for gpio support.
Using the common code removes some code duplication, and
makes it easier to switch to using mmc_of_parse() which
will remove more duplication.

This uses the new mmc_gpio_request_cd_isr to provide a non-standard
interrupt service routine for card-detect interrupts.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:29 +01:00
NeilBrown
c7ea834d81 mmc: slot-gpio: Allow host driver to provide isr for card-detect interrupts
One of the reasons omap_hsmmc doesn't use the slot-gpio library
is that it has some non-standard functionality in the card-detect
interrupt service routine.

To make it possible for omap_hsmmc (and maybe others) to be converted
to use slot-gpio, add 'mmc_gpio_request_cd_isr' which provide an
alternate isr to be register by the slot-gpio code.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:29 +01:00
Andy Shevchenko
94203042cd mmc: sdhci-acpi: fix copy'n'paste typos in the comments
Just fix the comments, no functional changes.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:28 +01:00
Johan Rudholm
dc0ecfef29 mmc: sd: add reset bus_ops callback
Enable power cycle and re-initialization of SD cards via the reset
bus_ops. Power cycling a buggy SD card sometimes helps it get back on
track.

Signed-off-by: Johan Rudholm <johanru@axis.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:28 +01:00
Johan Rudholm
f855a3717e mmc: core: refactor the hw_reset routines
Move the (e)MMC specific hw_reset code from core.c into mmc.c. Call the
code from the new bus_ops member "reset". This also allows for adding
a SD card specific reset procedure.

Signed-off-by: Johan Rudholm <johanru@axis.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:27 +01:00
Johan Rudholm
83533ab283 mmc: core: always check status after reset
Always check if the card is alive after a successful reset. This allows
us to remove mmc_hw_reset_check(), leaving mmc_hw_reset() as the only
card reset interface.

Signed-off-by: Johan Rudholm <johanru@axis.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:27 +01:00
Sascha Hauer
25185f3f31 mmc: Add SDIO function devicetree subnode parsing
This adds SDIO devicetree subnode parsing to the mmc core. While
SDIO devices are runtime probable they sometimes need nonprobable
additional information on embedded systems, like an additional gpio
interrupt or a clock. This patch makes it possible to supply this
information from the devicetree. SDIO drivers will find a pointer
to the devicenode in their devices of_node pointer.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
[hdegoede@redhat.com: Misc. cleanups]
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:26 +01:00
Sascha Hauer
a31edf1e58 mmc: Add SDIO function subnode DT documentation
While SDIO devices are runtime probable they sometimes need nonprobable
additional information on embedded systems, like an additional gpio
interrupt or a clock. This binding describes how to add child nodes to the
devicetree to supply this information.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
[hdegoede@redhat.com: Documented the need for #address- and #size-cells]
[hdegoede@redhat.com: Added a real world example]
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:26 +01:00
Ulf Hansson
9b449e9992 mmc: sdhci-acpi: Remove redundant runtime PM idle callback
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:25 +01:00
Haibo Chen
348487cb28 mmc: sdhci: use pipeline mmc requests to improve performance
This patch is based on the patches by Per Forlin, Tony Lin and Ryan QIAN.

This patch complete the API 'post_req' and 'pre_req' in sdhci host side,

Test Env:
1. i.MX6Q-SABREAUTO board, CPU @ 996MHz, use ADMA in uSDHC controller.
2. Test command:
		$ echo 1 > /proc/sys/vm/drop_caches
	write to sd card:
		$ dd if=/dev/zero of=/dev/mmcblk0 bs=1M count=2000 conv=fsync
	read the sd card:
		$ dd if=/dev/mmcblk0 of=/dev/null bs=1M count=2000

3. TOSHIBA 16GB SD3.0 card, running at 4 bit, SDR104 @ 198MHZ
	Performance with and without this patch:
      -------------------------------------------------
	  |                    | read speed | write speed |
	  |------------------------------------------------
	  | with this patch    | ~76.7 MB/s |  ~23.3 MB/s |
	  |------------------------------------------------
	  |without this patch  | ~60.5 MB/s |  ~22.5 MB/s |
	  -------------------------------------------------

4. SanDisk 8GB SD3.0 card, running at 4 bit, DDR50 @ 50MHZ
	Performance with and without this patch:
      -------------------------------------------------
	  |                    | read speed | write speed |
	  |------------------------------------------------
	  | with this patch    | ~40.5 MB/s |  ~15.6 MB/s |
	  |------------------------------------------------
	  |without this patch  | ~36.1 MB/s |  ~14.1 MB/s |
	  -------------------------------------------------

5. Kingston 8GB SD2.0 card, running at 4 bit, High-speed @ 50MHZ
	Performance with and without this patch:
      -------------------------------------------------
	  |                    | read speed | write speed |
	  |------------------------------------------------
	  | with this patch    | ~22.7 MB/s |  ~8.2 MB/s  |
	  |------------------------------------------------
	  |without this patch  | ~21.3 MB/s |  ~8.0 MB/s  |
	  -------------------------------------------------

6. About eMMC, Sandisk 8GB eMMC on i.MX6DL-sabresd board, CPU @ 792MHZ,
   eMMC running at 8 bit, DDR52 @ 52MHZ.
	Performance with and without this patch:
      -------------------------------------------------
	  |                    | read speed | write speed |
	  |------------------------------------------------
	  | with this patch    | ~37.3 MB/s |  ~10.5 MB/s |
	  |------------------------------------------------
	  |without this patch  | ~33.4 MB/s |  ~10.5 MB/s |
	  -------------------------------------------------

Signed-off-by: Haibo Chen <haibo.chen@freescale.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:25 +01:00
Andrew Gabbasov
2070d805bc mmc: sdhci: Remove redundant ADMA page boundary warnings
The bounce buffer, used for misaligned bytes for ADMA access,
resides wholly within the (align_sz)-aligned word, just by construction.
The page addresses are aligned to (align_sz), either for 4 or 8 bytes
alignment, so that the aligned word resides wholly within a single page
and can't cross the page boundary. So, the bounce buffer can't cross
the page boundary too. That's why the warnings are never hit, and can
be safely removed.

Signed-off-by: Andrew Gabbasov <andrew_gabbasov@mentor.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:24 +01:00
Ulf Hansson
04cdbbfa73 mmc: core: Make tuning block patterns static
Since previous patches removed the need for the tuning block patterns
to be exported, let's move them close to the mmc_send_tuning() API.

Those are now intended to be used only by the mmc core.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
2015-01-19 09:56:24 +01:00
Ulf Hansson
6c2c650610 mmc: dw_mmc: Convert to mmc_send_tuning()
Instead of having a local hack taking care of sending the tuning
command and as well to verify the response pattern, let's convert to
the common mmc_send_tuning() API.

This change affects the Exynos variant, since it's the only one which
support the dw_mmc's ->execute_tuning() callback.

It's seems like dw_mmc internal logic expects failed data transfers to
be ended using a stop command. Let the tuning requests also fall into
this category, since there are data transfer involved.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
Tested-by: Alim Akhtar <alim.akhtar@samsung.com>
2015-01-19 09:56:23 +01:00
Ulf Hansson
6f2d3c89db mmc: mmci: Do pm_runtime_put() after the host has been added
Previously the pm_runtime_put() caused the device to be runtime PM
suspended, but then immediately being resumed when we add the host.

Prevent this unnecessary runtime PM suspend/resume cycle during
->probe() by moving the call to pm_runtime_put() after mmc_add_host().

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:23 +01:00
Ulf Hansson
106276bbc9 mmc: sdhci-pci: Remove redundant runtime PM idle callback
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:22 +01:00
Ulf Hansson
77903c01d8 mmc: sdhci-esdhc-imx: Fixup runtime PM conditions during ->probe()
By configure runtime PM prior we enable the use of it, we close the gap
for strange and unhandled conditions. Moreover it makes us rely on the
driver core, after finalized ->probe(), to request an inactive device
to become runtime PM idle/suspended, which earlier potentially could
happen already at pm_runtime_set_autosuspend_delay().

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:22 +01:00
Ulf Hansson
0b41436840 mmc: sdhci-esdhc-imx: Fixup ->remove()
Since sdhci_remove_host() access the device, we need to make sure it's
runtime PM resumed.

To handle clock gating properly in remove, we first have to make sure
the clocks are ungated.

To fix both these issues, by invoking pm_runtime_get_sync() early in
->remove() callback. Later once we disabled runtime PM, we can restore
the usage count.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:21 +01:00
Wolfram Sang
0ac223a439 mmc: mvsdio: don't use devm_pinctrl_get_select_default() in probe
Since commit ab78029ecc (drivers/pinctrl: grab default handles from device
core), we can rely on device core for setting the default pins.

Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:21 +01:00
Beomho Seo
bf3707eae6 mmc: dw_mmc: remove unnecessary debug message
This patch remove unnecessary 'out of memory' message on dw mmc driver.

Signed-off-by: Beomho Seo <beomho.seo@samsung.com>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:20 +01:00
Micky Ching
56d1c0d941 mmc: rtsx: swap function position to avoid pre declaration
move function sd_read_data()/sd_write_data() behind
sd_send_cmd_get_rsp() to avoid pre-declaration.

Signed-off-by: Micky Ching <micky_ching@realsil.com.cn>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:20 +01:00
Micky Ching
1dcb35799e mmc: rtsx: add support for sdio card
Modify transfer mode for support sdio card,
send cmd and data at the same time for read data transfer,
but send data after cmd for write data transfer.

Signed-off-by: Micky Ching <micky_ching@realsil.com.cn>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:20 +01:00
Micky Ching
2d48e5f1be mmc: rtsx: add helper function to simplify code
To support sdio card, transfer mode need make a change,
this need to split code and use it in different place,
Add new function to simplify repeat operation.

Signed-off-by: Micky Ching <micky_ching@realsil.com.cn>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:19 +01:00
Micky Ching
2057647f0c mmc: rtsx: init cookie at probe/card_event
host->cookie is used for handle async request,
we should init it to negative value when new card inserted,
make cookie value invalid.

Signed-off-by: Micky Ching <micky_ching@realsil.com.cn>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:19 +01:00
Micky Ching
755987f9a3 mmc: rtsx: add dump_reg_range to simplify dump register
Add a new function to dump register within a range.
We print 1 register a line before this patch,
this may make debug info too long when we add more register to dump.

The new dump_reg_range() dump to 8 register a line,
and it is easy to use.

Signed-off-by: Micky Ching <micky_ching@realsil.com.cn>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:18 +01:00
Ulf Hansson
df8aca162e mmc: slot-gpio: Rework how to handle allocation of slot-gpio data
By moving the allocation of the slot-gpio data into mmc_alloc_host(),
we can remove the slot-gpio internal calls to mmc_gpio_alloc().

This means mmc_gpio_alloc() has now only one caller left, which
consequence allow us to simplify and remove some of the slot-gpio code.

Additionally, this makes the slot-gpio mutex redundant, so let's remove
it.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:18 +01:00
Ulf Hansson
e2d1926bad mmc: core: Free all resources for the class device at ->dev_release()
To be consistent when freeing data, let's move the idr_remove() call
from mmc_free_host() into the ->dev_release() callback for the class
device.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:17 +01:00
Ulf Hansson
7f133de1fb mmc: slot-gpio: Make mmc_gpio_alloc() available for MMC core
As a step in moving slot-gpio functions/structs closer to the MMC core,
let's add a local header file for slot-gpio.

In this initial step we move mmc_gpio_alloc() into the header file,
to make it available for the MMC core. Following patches will show the
utilization of it.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:17 +01:00
Ulf Hansson
b4cc580bb6 mmc: slot-gpio: Use the parent device while allocating data
We had a mix of using the class device and the parent device while
allocating data through the devm_* managed functions.

Let's be more consistent and always use the parent device.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:16 +01:00
Ulf Hansson
eddbc3abc5 mmc: slot-gpio: Remove option to explicitly free requested CD/WP GPIOs
The slot-gpio uses the devm*_ managed functions. Still it provide APIs
to explicitly free requested CD/WP GPIOs, but these API isn't being
used.

Therefore let's simplify slot-gpio by removing these unused APIs. If it
later turns out we need some of them, we can always consider to restore
the code.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:16 +01:00
Ulf Hansson
c2f28eecda mmc: sdhci-sirf: Remove redundant use of mmc_gpio_free_cd()
The MMC core makes use of the devm_* functions while requesting the
CD/WP GPIOs, let's rely on that.

Cc: Barry Song <baohua@kernel.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:15 +01:00
Ulf Hansson
d30656e59a mmc: mvsdio: Remove redundant use of mmc_gpio_free_cd|ro()
The MMC core makes use of the devm_* functions while requesting the
CD/WP GPIOs, let's rely on that.

Cc: Nicolas Pitre <nico@fluxnic.net>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:15 +01:00
Ulf Hansson
9116752f51 mmc: core: Return error at failure of request CD/WP in mmc_of_parse()
Instead of just printing an error when mmc_of_parse() fails to request
CD/WP GPIO pins, let's propagate all errors, except for -ENOENT.
Earlier only -EPROBE_DEFER was handled correctly.

As a side effect of this change and by relying on host drivers to
handle the errors during ->probe(), we don't need to free any data in
the error path.

This also means we are actually fixing a bug, since we remove the call
to mmc_gpio_free_cd() which wasn't the correct function to invoke to
handle cleanup. Instead that should have been mmc_gpiod_free_cd().

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:14 +01:00
Ulf Hansson
fc702cb35d mmc: sdhci-st: Do cleanup while mmc_of_parse() return an error
At errors, balance sdhci_pltfm_init() with sdhci_pltfm_free(), to make
sure all data is freed properly.

Cc: Srinivas Kandagatla <srinivas.kandagatla@gmail.com>
Cc: Maxime Coquelin <maxime.coquelin@st.com>
Cc: Patrice Chotard <patrice.chotard@st.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Maxime Coquelin <maxime.coquelin@st.com>
2015-01-19 09:56:14 +01:00
Ulf Hansson
f8e3260c13 mmc: sdhci-s3c: Handle error from mmc_of_parse()
Since mmc_of_parse() may fail, let's deal with it and thus do proper
error handling.

Cc: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
2015-01-19 09:56:13 +01:00
Ulf Hansson
f0991408ae mmc: sdhci-of-esdhc: Handle error from mmc_of_parse()
Since mmc_of_parse() may fail, let's deal with it and thus do proper
error handling.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:13 +01:00
Ulf Hansson
acfa77b1a9 mmc: sdhci-bcm-kona: Handle error from mmc_of_parse()
Since mmc_of_parse() may fail, let's deal with it and thus do proper
error handling.

Cc: Christian Daudt <bcm@fixthebug.org>
Cc: Matt Porter <mporter@linaro.org>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
2015-01-19 09:56:12 +01:00
Ulf Hansson
6d2b421895 mmc: moxart: Handle error from mmc_of_parse()
Since mmc_of_parse() may fail, let's deal with it and thus do proper
error handling.

Cc: Jonas Jensen <jonas.jensen@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:12 +01:00
Seungwon Jeon
0b5fce48a6 mmc: dw_mmc: exynos: move definitions to header file
Move exynos related definition to header file. And this
also changes some of the registers name to match the standard
naming convention.

Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
[Alim: updated the commit message]
Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:11 +01:00
Seungwon Jeon
a2a1fed8ea mmc: dw_mmc: exynos: don't use if clock isn't available
Add checking whether the clock is valid.

Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:11 +01:00
Seungwon Jeon
1a25b1b419 mmc: dw_mmc: fix the max_blk_count in IDMAC
Even though 1MB is reserved for descriptor table in IDMAC,
the dw_mmc host driver is allowed to receive only maximum
128KB block length in one request. This is caused by setting
improper max_blk_count. It needs to be e adjusted so that
descriptor table is used fully. It is found that the performance
is improved with the increased the max_blk_count.

Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:11 +01:00
Dan Carpenter
9ef219c53f mmc: mxs-mmc: remove unneeded NULL check
Static checkers complain about the inconsistent NULL checking here:

	drivers/mmc/host/mxs-mmc.c:680 mxs_mmc_probe()
	warn: variable dereferenced before check 'ssp->dmach' (see line 660)

The variable can't actually be NULL so we can remove the check.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-01-19 09:56:10 +01:00