mmc: sh_mmcif: rework dma channel handling

When compiling the sh_mmcif driver for ARM64, we currently
get a harmless build warning:

../drivers/mmc/host/sh_mmcif.c: In function '

mmc: sh_mmcif: rework dma channel handling

When compiling the sh_mmcif driver for ARM64, we currently
get a harmless build warning:

../drivers/mmc/host/sh_mmcif.c: In function 'sh_mmcif_request_dma_one':
../drivers/mmc/host/sh_mmcif.c:417:4: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
(void *)pdata->slave_id_tx :
^
../drivers/mmc/host/sh_mmcif.c:418:4: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
(void *)pdata->slave_id_rx;

This could be worked around by adding another cast to uintptr_t, but
I decided to simplify the code a little more to avoid that. This
splits out the platform data using code into a separate function
and builds that only for CONFIG_SUPERH. This part still has a typecast
but does not need a second one. The SH platform code could be further
modified to pass a pointer directly as we do on other architectures
when we have a filter function.

The normal case is simplified further and now just calls
dma_request_slave_channel() directly without going through the
compat handling.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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mmc: sh_mmcif: Fix suspend process

The clock should be enable when SDHI registers are accessed.

Signed-off-by: Koji Matsuoka <koji.matsuoka.xm@renesas.com>
Signed-off-by: Yoshih

mmc: sh_mmcif: Fix suspend process

The clock should be enable when SDHI registers are accessed.

Signed-off-by: Koji Matsuoka <koji.matsuoka.xm@renesas.com>
Signed-off-by: Yoshihiro Kaneko <ykaneko0929@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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mmc: sh_mmcif: calculate best clock with parent clock

MMCIF IP on R-Car series has parent clock which can be set several rate,
and it was not implemented on old SH-Mobile series (= SH-Mo

mmc: sh_mmcif: calculate best clock with parent clock

MMCIF IP on R-Car series has parent clock which can be set several rate,
and it was not implemented on old SH-Mobile series (= SH-Mobile series
parent clock was fixed rate) R-Car series MMCIF can use more high speed
access if it setups parent clock. This patch adds parent clock setup
method. It will be used if DT has "max-frequency", and then, this driver
assumes it is booted on R-Car Gen2 or later SoC. Because SH-Mobile series
(which doesn't boot from DT) and R-Car series (which boots from DT) have
different divider.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Tested-by: Keita Kobayashi <keita.kobayashi.ym@renesas.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
[Ulf: Silence compiler warning]

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mmc: sh_mmcif: use sh_mmcif_xxx prefix for all functions

Current sh_mmcif driver is using sh_mmcif_xxx and mmcif_xxx
for functions. This patch used sh_mmcif_xxx for all functions.

mmc: sh_mmcif: use sh_mmcif_xxx prefix for all functions

Current sh_mmcif driver is using sh_mmcif_xxx and mmcif_xxx
for functions. This patch used sh_mmcif_xxx for all functions.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Tested-by: Keita Kobayashi <keita.kobayashi.ym@renesas.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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mmc: sh_mmcif: add sh_mmcif_host_to_dev() macro and use it.

Current sh_mmcif driver is directly using &host->pd->dev in all place.
It is not big problem, but it is unreadable, and it can

mmc: sh_mmcif: add sh_mmcif_host_to_dev() macro and use it.

Current sh_mmcif driver is directly using &host->pd->dev in all place.
It is not big problem, but it is unreadable, and it can be cause of
future bug. This patch adds new sh_mmcif_host_to_dev() and use it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Tested-by: Keita Kobayashi <keita.kobayashi.ym@renesas.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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mmc: sh_mmcif: separate sh_mmcif_clk_update() into setup and prepare

Current sh_mmcif_clk_update() is called from probe() and set_ios(),
but, the purpose of later one is just clk_prepare

mmc: sh_mmcif: separate sh_mmcif_clk_update() into setup and prepare

Current sh_mmcif_clk_update() is called from probe() and set_ios(),
but, the purpose of later one is just clk_prepare_enable().
No need to setup mmc->f_max/f_min in many times.
This patch separe sh_mmcif_clk_update() into clk_prepare_enable()
and mmc->f_max/f_min setup.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Tested-by: Keita Kobayashi <keita.kobayashi.ym@renesas.com>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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mmc: sh_mmcif: remove unnecessary int clk from struct sh_mmcif_host

struct sh_mmcif_host has 1) int clk, 2) struct clock *hclk,
and host->clk = clk_get_rate(host->hclk).
This int clk

mmc: sh_mmcif: remove unnecessary int clk from struct sh_mmcif_host

struct sh_mmcif_host has 1) int clk, 2) struct clock *hclk,
and host->clk = clk_get_rate(host->hclk).
This int clk is not necessary. Let's remove it.
And, current hclk is confusable naming. Let's rename it to clk.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Tested-by: Keita Kobayashi <keita.kobayashi.ym@renesas.com>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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mmc: sh_mmcif: cleanup to use dev instead of &pdev->dev

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Tested-by: Keita Kobayashi <keita.kobayashi.ym@renesas.com>

mmc: sh_mmcif: cleanup to use dev instead of &pdev->dev

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Tested-by: Keita Kobayashi <keita.kobayashi.ym@renesas.com>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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mmc: sh_mmcif: move mmcif_of_match to upside

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Tested-by: Keita Kobayashi <keita.kobayashi.ym@renesas.com>
Acked-by:

mmc: sh_mmcif: move mmcif_of_match to upside

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Tested-by: Keita Kobayashi <keita.kobayashi.ym@renesas.com>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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mmc: sh_mmcif: Fix timeout value for command request

f9fd54f22e ("mmc: sh_mmcif: Use msecs_to_jiffies() for host->timeout")
changed the timeout value from 1000 jiffies to 1s. In the case

mmc: sh_mmcif: Fix timeout value for command request

f9fd54f22e ("mmc: sh_mmcif: Use msecs_to_jiffies() for host->timeout")
changed the timeout value from 1000 jiffies to 1s. In the case where
HZ is 1000 the values are the same. However, for smaller HZ values the
timeout is now smaller, 1s instead of 10s in the case of HZ=100.

Since the timeout occurs in spite of a normal data transfer a timeout of
10s seems more appropriate. This restores the previous timeout in the
case where HZ=100 and results in an increase over the previous timeout
for larger values of HZ.

Fixes: f9fd54f22e ("mmc: sh_mmcif: Use msecs_to_jiffies() for host->timeout")
Signed-off-by: Takeshi Kihara <takeshi.kihara.df@renesas.com>
[horms: rewrote changelog to refer to HZ]
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Yoshihiro Kaneko <ykaneko0929@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma

Pull slave-dmaengine updates from Vinod Koul:

- new drivers for:
- Ingenic JZ4780 controller

Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma

Pull slave-dmaengine updates from Vinod Koul:

- new drivers for:
- Ingenic JZ4780 controller
- APM X-Gene controller
- Freescale RaidEngine device
- Renesas USB Controller

- remove device_alloc_chan_resources dummy handlers

- sh driver cleanups for peri peri and related emmc and asoc patches
as well

- fixes and enhancements spread over the drivers

* 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma: (59 commits)
dmaengine: dw: don't prompt for DW_DMAC_CORE
dmaengine: shdmac: avoid unused variable warnings
dmaengine: fix platform_no_drv_owner.cocci warnings
dmaengine: pch_dma: fix memory leak on failure path in pch_dma_probe()
dmaengine: at_xdmac: unlock spin lock before return
dmaengine: xgene: devm_ioremap() returns NULL on error
dmaengine: xgene: buffer overflow in xgene_dma_init_channels()
dmaengine: usb-dmac: Fix dereferencing freed memory 'desc'
dmaengine: sa11x0: report slave capabilities to upper layers
dmaengine: vdma: Fix compilation warnings
dmaengine: fsl_raid: statify fsl_re_chan_probe
dmaengine: Driver support for FSL RaidEngine device.
dmaengine: xgene_dma_init_ring_mngr() can be static
Documentation: dma: Add documentation for the APM X-Gene SoC DMA device DTS binding
arm64: dts: Add APM X-Gene SoC DMA device and DMA clock DTS nodes
dmaengine: Add support for APM X-Gene SoC DMA engine driver
dmaengine: usb-dmac: Add Renesas USB DMA Controller (USB-DMAC) driver
dmaengine: renesas,usb-dmac: Add device tree bindings documentation
dmaengine: edma: fixed wrongly initialized data parameter to the edma callback
dmaengine: ste_dma40: fix implicit conversion
...

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mmc: sh_mmcif: Add exclusion between cmd and interrupt

A command end interrupt should not be processed between command issue
and setting of wait_for flag. It expects already the flag to

mmc: sh_mmcif: Add exclusion between cmd and interrupt

A command end interrupt should not be processed between command issue
and setting of wait_for flag. It expects already the flag to be set.
Therefore the exclusive control was added.

Signed-off-by: Kouichi Tomita <kouichi.tomita.yn@renesas.com>
Signed-off-by: Yoshihiro Kaneko <ykaneko0929@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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mmc: sh_mmcif: Move dev_err() of mmcif_timeout_work()

If interruption of command already occurred, mrq pointer in dev_err()
would refer to NULL, because the host-state is changed to STAT

mmc: sh_mmcif: Move dev_err() of mmcif_timeout_work()

If interruption of command already occurred, mrq pointer in dev_err()
would refer to NULL, because the host-state is changed to STATE_IDLE
and mrq pointer is changed to NULL by interrupt handler.
Therefore dev_err is moved after checking STATE_IDLE.

Signed-off-by: Kouichi Tomita <kouichi.tomita.yn@renesas.com>
Signed-off-by: Yoshihiro Kaneko <ykaneko0929@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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mmc: sh_mmcif: remove slave_id settings for DMAEngine

Current sh_mmcif sets dma_slave_config :: slave_id field for DMAEngine,
but it is no longer needed. Let's remove it.

Signed

mmc: sh_mmcif: remove slave_id settings for DMAEngine

Current sh_mmcif sets dma_slave_config :: slave_id field for DMAEngine,
but it is no longer needed. Let's remove it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

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mmc: remove .owner field for drivers using module_platform_driver

This patch removes the superflous .owner field for drivers which
use the module_platform_driver API, as this is override

mmc: remove .owner field for drivers using module_platform_driver

This patch removes the superflous .owner field for drivers which
use the module_platform_driver API, as this is overriden in
platform_driver_register anyway.

Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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mmc: sh_mmcif: Configure DMA slave bus width

The data register is 4 bytes wide, hardcode the DMA transfer size to
4 bytes in both directions.

Signed-off-by: Laurent Pinchart <la

mmc: sh_mmcif: Configure DMA slave bus width

The data register is 4 bytes wide, hardcode the DMA transfer size to
4 bytes in both directions.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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mmc: sh_mmcif: Fix DMA slave address configuration

Commit e5a233cb647d749de2f188477c9a54b94d90477f ("mmc: sh_mmcif:
Factorize DMA channel request and configuration code") incorrectly

mmc: sh_mmcif: Fix DMA slave address configuration

Commit e5a233cb647d749de2f188477c9a54b94d90477f ("mmc: sh_mmcif:
Factorize DMA channel request and configuration code") incorrectly
set the destination address for both slave channels instead of setting
the source address for the receive channel. Fix that.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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mmc: sh-mmcif: final error path cleanup

Remove the error path items that are no longer needed. The mmc card-detect
code cleans up after itself (and registers with devm) and the host erro

mmc: sh-mmcif: final error path cleanup

Remove the error path items that are no longer needed. The mmc card-detect
code cleans up after itself (and registers with devm) and the host error
is the same as the clock disable.

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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mmc: sh-mmcif: no need to call pm_runtime_suspend on error

The pm_runtime call should implicitly disable the device once the
probe is over if there is no explicit reference gained. There

mmc: sh-mmcif: no need to call pm_runtime_suspend on error

The pm_runtime call should implicitly disable the device once the
probe is over if there is no explicit reference gained. There is no
need to call pm_runtime_suspend() before the pm_runtime_disable()
call.

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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mmc: sh-mmcif: use devm_ for irq management

Use devm_request_threaded_irq() for the host interrupt handlers so we
do not have to worry about freeing them on exit or error. Tidies up the

mmc: sh-mmcif: use devm_ for irq management

Use devm_request_threaded_irq() for the host interrupt handlers so we
do not have to worry about freeing them on exit or error. Tidies up the
exit path code for the driver.

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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mmc: sh-mmcif: use devm_ for clock management

Use the devm_clk_get() code to get the clock and allow it to be freed
automatically on release.

Signed-off-by: Ben Dooks <ben.dooks

mmc: sh-mmcif: use devm_ for clock management

Use the devm_clk_get() code to get the clock and allow it to be freed
automatically on release.

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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mmc: sh-mmcif: use devm_ for ioremap

Start tidying the probe/release code by using devm_ioremap_resource() to
map the IO registers.

Signed-off-by: Ben Dooks <ben.dooks@codethink

mmc: sh-mmcif: use devm_ for ioremap

Start tidying the probe/release code by using devm_ioremap_resource() to
map the IO registers.

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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mmc: sh-mmcif: update to print version and bus clock rate on probe

Change the initial print to show chip version and the bus rate it is
working at instead of the driver version. This is

mmc: sh-mmcif: update to print version and bus clock rate on probe

Change the initial print to show chip version and the bus rate it is
working at instead of the driver version. This is more useful information
as we already know which driver version from the kernel it is in.

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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mmc: sh_mmcif: clarify DDR timing mode between SD-UHS and eMMC

Replaced UHS_DDR50 with MMC_DDR52.

CC: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Seungwon Jeon

mmc: sh_mmcif: clarify DDR timing mode between SD-UHS and eMMC

Replaced UHS_DDR50 with MMC_DDR52.

CC: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Chris Ball <chris@printf.net>

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mmc: sh_mmcif: Fix compilation warning on 64-bit platforms

Casting an integer to a void * generates a "cast to pointer from integer
of different size" warning. Cast the integer to an uns

mmc: sh_mmcif: Fix compilation warning on 64-bit platforms

Casting an integer to a void * generates a "cast to pointer from integer
of different size" warning. Cast the integer to an unsigned long first
to fix it.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

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