The hardware (except for the ROCKCHIP_SPI_VER2_TYPE2 version) does not
support active-high native chip selects. However if such a CS is configured
the core does not error as it normally should, because the
'ctlr->use_gpio_descriptors = true' line in rockchip_spi_probe() makes the
core set SPI_CS_HIGH in ctlr->mode_bits.

In such a case the spi-rockchip driver operates normally but produces an
active-low chip select signal without notice.

There is no provision in the current core code to handle this
situation. Fix by adding a check in the ctlr->setup function (similarly to
what spi-atmel.c does).

This cannot be done reading the SPI_CS_HIGH but in ctlr->mode_bits because
that bit gets always set by the core for master mode (see above).

Fixes: eb1262e3 ("spi: spi-rockchip: use num-cs property and ctlr->enable_gpiods")
Signed-off-by: NLuca Ceresoli <luca.ceresoli@bootlin.com>
Link: https://lore.kernel.org/r/20220421213251.1077899-1-luca.ceresoli@bootlin.comSigned-off-by: NMark Brown <broonie@kernel.org>

Using pm_runtime_resume_and_get() to replace pm_runtime_get_sync and
pm_runtime_put_noidle. This change is just to simplify the code, no
actual functional changes.
Reported-by: NZeal Robot <zealci@zte.com.cn>
Signed-off-by: NMinghao Chi <chi.minghao@zte.com.cn>
Link: https://lore.kernel.org/r/20220414085433.2541670-1-chi.minghao@zte.com.cnSigned-off-by: NMark Brown <broonie@kernel.org>

Using pm_runtime_resume_and_get() to replace pm_runtime_get_sync and
pm_runtime_put_noidle. This change is just to simplify the code, no
actual functional changes.
Reported-by: NZeal Robot <zealci@zte.com.cn>
Signed-off-by: NMinghao Chi <chi.minghao@zte.com.cn>
Link: https://lore.kernel.org/r/20220420090420.2588868-1-chi.minghao@zte.com.cnSigned-off-by: NMark Brown <broonie@kernel.org>

Using pm_runtime_resume_and_get() to replace pm_runtime_get_sync and
pm_runtime_put_noidle. This change is just to simplify the code, no
actual functional changes.
Reported-by: NZeal Robot <zealci@zte.com.cn>
Signed-off-by: NMinghao Chi <chi.minghao@zte.com.cn>
Link: https://lore.kernel.org/r/20220414085343.2541608-1-chi.minghao@zte.com.cnSigned-off-by: NMark Brown <broonie@kernel.org>

Using pm_runtime_resume_and_get() to replace pm_runtime_get_sync and
pm_runtime_put_noidle. This change is just to simplify the code, no
actual functional changes.
Reported-by: NZeal Robot <zealci@zte.com.cn>
Signed-off-by: NMinghao Chi <chi.minghao@zte.com.cn>
Link: https://lore.kernel.org/r/20220414085506.2541732-1-chi.minghao@zte.com.cnSigned-off-by: NMark Brown <broonie@kernel.org>

If the device is already in a runtime PM enabled state
pm_runtime_get_sync() will return 1, so a test for negative
value should be used to check for errors.

Fixes: deba2580 ("spi: Add driver for IMG SPFI controller")
Signed-off-by: NZheng Yongjun <zhengyongjun3@huawei.com>
Link: https://lore.kernel.org/r/20220422062641.10486-1-zhengyongjun3@huawei.comSigned-off-by: NMark Brown <broonie@kernel.org>

Currently the driver goes over the supported opcodes list each time
->exec_op() is called and finds the suitable for the given operation.
This consumes unnecessary amount of CPU cycles because the operation is
always the same. For this reason populate dirmap hooks for the driver so
that we cache the selected operation and then simply call it on each
read/write.
Signed-off-by: NMika Westerberg <mika.westerberg@linux.intel.com>
Link: https://lore.kernel.org/r/20220420104350.19510-1-mika.westerberg@linux.intel.comSigned-off-by: NMark Brown <broonie@kernel.org>

Merge series from AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>:

This series performs some cleanups to the spi-mt65xx driver, removing
all gotos, simplifying the probe function and adding kerneldoc to the
driver structures.

Some definitions at the beginning of this file were wrongly
indented: fix the indentation for all of these and, while at
it, also move the MTK_SPI_IDLE and MTK_SPI_PAUSED down, as to
implicitly group the hardware related definitions to the
software (driver) related ones.
Signed-off-by: NAngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20220407114428.167091-9-angelogioacchino.delregno@collabora.comSigned-off-by: NMark Brown <broonie@kernel.org>

One of the two structures was already partially documented, but not
in kerneldoc format: enhance readability by adding the missing
documentation bits and use kerneldoc.
Signed-off-by: NAngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20220407114428.167091-8-angelogioacchino.delregno@collabora.comSigned-off-by: NMark Brown <broonie@kernel.org>

Switch to dev_err_probe() to remove all dev_err() -> return repeated
patterns, simplifying and shortening the probe function.
Signed-off-by: NAngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20220407114428.167091-7-angelogioacchino.delregno@collabora.comSigned-off-by: NMark Brown <broonie@kernel.org>

The last goto in the probe function can be removed by calling
pm_runtime_enable() right before devm_spi_register_master(), as
only some init checks were being performed after enabling pm.
This is a cleanup and brings no functional changes.
Signed-off-by: NAngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20220407114428.167091-6-angelogioacchino.delregno@collabora.comSigned-off-by: NMark Brown <broonie@kernel.org>

Reparenting sel_clk to parent_clk can be done before enabling any of
spi_clk and spi_hclk. Move the call to clk_set_parent() for sel_clk
earlier, and call disable_unprepare() upon spi_clk prepare_enable()
failure to remove all clock disablement related gotos.
This commit is in preparation of a later cleanup.
Signed-off-by: NAngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20220407114428.167091-5-angelogioacchino.delregno@collabora.comSigned-off-by: NMark Brown <broonie@kernel.org>

In preparation for switching to dev_err_probe() in this function, add
a pointer to struct device and replace all occurrences of '&pdev->dev'
to using this 'dev' pointer.
This is done for one-line fitting of the dev_err_probe() calls.
Signed-off-by: NAngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20220407114428.167091-4-angelogioacchino.delregno@collabora.comSigned-off-by: NMark Brown <broonie@kernel.org>

Instead of performing yet another match check in the probe function,
simply switch to device_get_match_data().
This is a cleanup and brings no functional change.
Signed-off-by: NAngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20220407114428.167091-3-angelogioacchino.delregno@collabora.comSigned-off-by: NMark Brown <broonie@kernel.org>

Switch to the devm variant of spi_alloc_master() to save some gotos.
This patch is a cleanup that brings no functional changes.
Signed-off-by: NAngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20220407114428.167091-2-angelogioacchino.delregno@collabora.comSigned-off-by: NMark Brown <broonie@kernel.org>

Using pm_runtime_resume_and_get is more appropriate
for simplifing code
Reported-by: NZeal Robot <zealci@zte.com.cn>
Signed-off-by: NMinghao Chi <chi.minghao@zte.com.cn>
Link: https://lore.kernel.org/r/20220418110226.2559081-1-chi.minghao@zte.com.cnSigned-off-by: NMark Brown <broonie@kernel.org>

When SPI_RX_CPHA_FLIP is set, flip CPHA on Rx only transfers. This is
useful to access devices that use inverted CPHA for MISO vs MOSI
signals.

Only support the mx51/mx53 variants for now.

Tested on i.MX6ULL based system.
Signed-off-by: NBaruch Siach <baruch.siach@siklu.com>
Link: https://lore.kernel.org/r/e11b4446afe9a46a282dd923d22c27d03fae15f8.1649702729.git.baruch@tkos.co.ilSigned-off-by: NMark Brown <broonie@kernel.org>

Allow userspace to set SPI_RX_CPHA_FLIP mode bit using the
SPI_IOC_WR_MODE32 ioctl.
Signed-off-by: NBaruch Siach <baruch.siach@siklu.com>
Link: https://lore.kernel.org/r/6ae31ad24f8252418878b21a8759a04b78726dac.1649702729.git.baruch@tkos.co.ilSigned-off-by: NMark Brown <broonie@kernel.org>

Some SPI devices latch MOSI bits on one clock phase, but produce valid
MISO bits on the other phase. Add SPI_RX_CPHA_FLIP mode to instruct the
controller driver to flip CPHA for Rx (MISO) only transfers.
Signed-off-by: NBaruch Siach <baruch.siach@siklu.com>
Link: https://lore.kernel.org/r/a715ca92713ca02071f33dcca9960a66a03c949a.1649702729.git.baruch@tkos.co.ilSigned-off-by: NMark Brown <broonie@kernel.org>

Should be 'specific' not 'spefific'. Fix this.
Reported-by: NHongli Li <hongli.li@intel.com>
Signed-off-by: NMika Westerberg <mika.westerberg@linux.intel.com>
Link: https://lore.kernel.org/r/20220411113158.2037-1-mika.westerberg@linux.intel.comSigned-off-by: NMark Brown <broonie@kernel.org>

Using pm_runtime_resume_and_get is more appropriate
for simplifing code
Reported-by: NZeal Robot <zealci@zte.com.cn>
Signed-off-by: NMinghao Chi <chi.minghao@zte.com.cn>
Link: https://lore.kernel.org/r/20220408080931.2494356-1-chi.minghao@zte.com.cnSigned-off-by: NMark Brown <broonie@kernel.org>

Using pm_runtime_resume_and_get is more appropriate
for simplifing code
Reported-by: NZeal Robot <zealci@zte.com.cn>
Signed-off-by: NMinghao Chi <chi.minghao@zte.com.cn>
Link: https://lore.kernel.org/r/20220412070951.2532157-1-chi.minghao@zte.com.cnSigned-off-by: NMark Brown <broonie@kernel.org>

Using pm_runtime_resume_and_get is more appropriate
for simplifing code
Reported-by: NZeal Robot <zealci@zte.com.cn>
Signed-off-by: NMinghao Chi <chi.minghao@zte.com.cn>
Link: https://lore.kernel.org/r/20220413093656.2538504-1-chi.minghao@zte.com.cnSigned-off-by: NMark Brown <broonie@kernel.org>

remove spin_lock_irq spin_unlock_irq and variable in the irq funciton
Signed-off-by: NLi-hao Kuo <lhjeff911@gmail.com>
Link: https://lore.kernel.org/r/f9991d6064d892d22ac7c2dfabe16309e9d03888.1650010304.git.lhjeff911@gmail.comSigned-off-by: NMark Brown <broonie@kernel.org>

The previous commit that made bits-per-word validation conditional
results in leaving no unconditional affectation of the status variable.

Since the variable is returned at the end of the function, initialize
it to avoid returning an undefined value.
Signed-off-by: NPaul Kocialkowski <paul.kocialkowski@bootlin.com>
Fixes: b3fe2e51 ("spi: core: Only check bits_per_word validity when explicitly provided")
Reported-by: NDan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20220414084040.975520-1-paul.kocialkowski@bootlin.comSigned-off-by: NMark Brown <broonie@kernel.org>

Pull in Atmel fix series, only first patch of which is for Linus
Signed-off-by: NMark Brown <broonie@kernel.org>

Remove the DTR checks as they are already handled in
spi_mem_default_supports_op(). This code removal was intentionally not done
in the previous patch that introduced the use of the
spi_mem_default_supports_op() core helper and fixed the buswidth adjustment
between SPIMEM and the SPI controller, so that the fix can be easily
backported to stable kernels.
Signed-off-by: NTudor Ambarus <tudor.ambarus@microchip.com>
Link: https://lore.kernel.org/r/20220406133604.455356-2-tudor.ambarus@microchip.comSigned-off-by: NMark Brown <broonie@kernel.org>

Use the spi_mem_default_supports_op() core helper in order to take into
account the buswidth specified by the user in device tree.

Cc: <stable@vger.kernel.org>
Fixes: 0e6aae08 ("spi: Add QuadSPI driver for Atmel SAMA5D2")
Signed-off-by: NTudor Ambarus <tudor.ambarus@microchip.com>
Link: https://lore.kernel.org/r/20220406133604.455356-1-tudor.ambarus@microchip.comSigned-off-by: NMark Brown <broonie@kernel.org>

Since the conversion to spi-mem, the driver advertised support for
various operations that cqspi_set_protocol() was never expected to handle
correctly - in particuar all non-DTR operations with command or address
buswidth > 1. For DTR, all operations except for 8-8-8 would fail, as
cqspi_set_protocol() returns -EINVAL.

In non-DTR mode, this resulted in data corruption for SPI-NOR flashes that
support such operations. As a minimal fix that can be backported to stable
kernels, simply disallow the unsupported operations again to avoid this
issue.

Fixes: a314f636 ("mtd: spi-nor: Convert cadence-quadspi to use spi-mem framework")
Signed-off-by: NMatthias Schiffer <matthias.schiffer@ew.tq-group.com>
Link: https://lore.kernel.org/r/20220406132832.199777-1-matthias.schiffer@ew.tq-group.comSigned-off-by: NMark Brown <broonie@kernel.org>

Intel Raptor Lake-S has the same SPI serial flash controller as Alder
Lake-P. Add Raptor Lake-S PCI ID to the driver list of supported
devices.
Signed-off-by: NMika Westerberg <mika.westerberg@linux.intel.com>
Link: https://lore.kernel.org/r/20220411112116.53281-1-mika.westerberg@linux.intel.comSigned-off-by: NMark Brown <broonie@kernel.org>

After system resumes, the registers of nor controller are
initialized with default values. The nor controller will
not function properly.

To handle both issues above, we add mtk_nor_init() in
mtk_nor_resume after pm_runtime_force_resume().

Fixes: 3bfd9103 ("spi: spi-mtk-nor: Add power management support")
Signed-off-by: NAllen-KH Cheng <allen-kh.cheng@mediatek.com>
Reviewed-by: NRex-BC Chen <rex-bc.chen@mediatek.com>
Link: https://lore.kernel.org/r/20220412115743.22641-1-allen-kh.cheng@mediatek.comSigned-off-by: NMark Brown <broonie@kernel.org>

The direction field in the DMA config is deprecated. The rspi driver
sets {src,dst}_{addr,addr_width} based on the DMA direction and
it results in dmaengine_slave_config() failure as RZ DMAC driver
validates {src,dst}_addr_width values independent of DMA direction.

This patch fixes the issue by passing both {src,dst}_{addr,addr_width}
values independent of DMA direction.
Signed-off-by: NBiju Das <biju.das.jz@bp.renesas.com>
Suggested-by: NVinod Koul <vkoul@kernel.org>
Reviewed-by: NVinod Koul <vkoul@kernel.org>
Reviewed-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Tested-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20220411173115.6619-1-biju.das.jz@bp.renesas.comSigned-off-by: NMark Brown <broonie@kernel.org>

On SPI device probe, the core will call spi_setup in spi_add_device
before the corresponding driver was probed. When this happens, the
bits_per_word member of the device is not yet set by the driver,
resulting in the default being set to 8 bits-per-word.

However some controllers do not support 8 bits-per-word at all, which
results in a failure when checking the bits-per-word validity.

In order to support these devices, skip the bits-per-word validity
check when it is not explicitly provided by drivers.
Signed-off-by: NPaul Kocialkowski <paul.kocialkowski@bootlin.com>
Link: https://lore.kernel.org/r/20220412122207.130181-1-paul.kocialkowski@bootlin.comSigned-off-by: NMark Brown <broonie@kernel.org>

Using pm_runtime_resume_and_get is more appropriate
for simplifing code
Reported-by: NZeal Robot <zealci@zte.com.cn>
Signed-off-by: NMinghao Chi <chi.minghao@zte.com.cn>
Reviewed-by: NPatrice Chotard <patrice.chotard@foss.st.com>
Link: https://lore.kernel.org/r/20220412070906.2532091-1-chi.minghao@zte.com.cnSigned-off-by: NMark Brown <broonie@kernel.org>

wait_for_completion_timeout() returns unsigned long not int.
It returns 0 if timed out, and positive if completed.
The check for <= 0 is ambiguous and should be == 0 here
indicating timeout which is the only error case.

Fixes: 5720ec0a ("spi: spi-ti-qspi: Add DMA support for QSPI mmap read")
Signed-off-by: NMiaoqian Lin <linmq006@gmail.com>
Link: https://lore.kernel.org/r/20220411111034.24447-1-linmq006@gmail.comSigned-off-by: NMark Brown <broonie@kernel.org>

Kernel function name don't match with function name.

Error log:
drivers/spi/spi-cadence.c:661: warning: expecting prototype for
cdns_spi_runtime_resume(). Prototype was for cnds_runtime_resume() instead
drivers/spi/spi-cadence.c:690: warning: expecting prototype for
cdns_spi_runtime_suspend(). Prototype was for cnds_runtime_suspend()
instead

Fixes: d36ccd9f ("spi: cadence: Runtime pm adaptation")
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>
Signed-off-by: NAmit Kumar Mahapatra <amit.kumar-mahapatra@xilinx.com>
Link: https://lore.kernel.org/r/20220322150018.12736-1-amit.kumar-mahapatra@xilinx.comSigned-off-by: NMark Brown <broonie@kernel.org>

This fixes case where MSPI controller is used to access spi-nor
flash and BSPI block is not present.

Fixes: 5f195ee7 ("spi: bcm-qspi: Implement the spi_mem interface")
Signed-off-by: NKamal Dasu <kdasu.kdev@gmail.com>
Acked-by: NFlorian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20220328142442.7553-1-kdasu.kdev@gmail.comSigned-off-by: NMark Brown <broonie@kernel.org>

cqspi_set_protocol() only set the data width, but ignored the command
and address width (except for 8-8-8 DTR ops), leading to corruption of
all transfers using 1-X-X or X-X-X ops. Fix by setting the other two
widths as well.

While we're at it, simplify the code a bit by replacing the
CQSPI_INST_TYPE_* constants with ilog2().

Tested on a TI AM64x with a Macronix MX25U51245G QSPI flash with 1-4-4
read and write operations.
Signed-off-by: NMatthias Schiffer <matthias.schiffer@ew.tq-group.com>
Link: https://lore.kernel.org/r/20220331110819.133392-1-matthias.schiffer@ew.tq-group.comSigned-off-by: NMark Brown <broonie@kernel.org>

Commit b470e10e ("spi: core: add dma_map_dev for dma device") added
dma_map_dev for _spi_map_msg() but missed to add for unmap routine,
__spi_unmap_msg(), so add it now.

Fixes: b470e10e ("spi: core: add dma_map_dev for dma device")
Cc: stable@vger.kernel.org # v5.14+
Signed-off-by: NVinod Koul <vkoul@kernel.org>
Link: https://lore.kernel.org/r/20220406132238.1029249-1-vkoul@kernel.orgSigned-off-by: NMark Brown <broonie@kernel.org>