This patch adds DMA capabilities to the spi-qup driver.  If DMA channels are
present, the QUP will use DMA instead of block mode for transfers to/from SPI
peripherals for transactions larger than the length of a block.
Signed-off-by: NAndy Gross <agross@codeaurora.org>
Signed-off-by: NStanimir Varbanov <stanimir.varbanov@linaro.org>
Reviewed-by: Ivan T. Ivanov <iivanov@mm-sol.com
Signed-off-by: NMark Brown <broonie@kernel.org>

num-cs is 32 bit property, don't read just upper 16 bits.

Fixes: 4a8573ab (spi: qup: Remove chip select function)
Signed-off-by: NIvan T. Ivanov <iivanov@mm-sol.com>
Signed-off-by: NMark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org

Device support SPI_CPOL, but driver have missed to add
support for this configuration.
Signed-off-by: NIvan T. Ivanov <iivanov@mm-sol.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

After commit b2b49ccb (PM: Kconfig: Set PM_RUNTIME if PM_SLEEP is
selected) PM_RUNTIME is always set if PM is set, so #ifdef blocks
depending on CONFIG_PM_RUNTIME may now be changed to depend on
CONFIG_PM.

Replace CONFIG_PM_RUNTIME with CONFIG_PM everywhere under
drivers/spi/.
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: NMark Brown <broonie@kernel.org>

A platform_driver does not need to set an owner, it will be populated by the
driver core.
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

This patch removes the chip select function.  Chip select should instead be
supported using GPIOs, defining the DT entry "cs-gpios", and letting the SPI
core assert/deassert the chip select as it sees fit.

The chip select control inside the controller is buggy.  It is supposed to
automatically assert the chip select based on the activity in the controller,
but it is buggy and doesn't work at all.  So instead we elect to use GPIOs.
Signed-off-by: NAndy Gross <agross@codeaurora.org>
Signed-off-by: NMark Brown <broonie@linaro.org>

This patch adds support for v1.1.1 of the SPI QUP controller.
Signed-off-by: NAndy Gross <agross@codeaurora.org>
Signed-off-by: NMark Brown <broonie@linaro.org>

This patch moves the devm_spi_register_master below the initialization of the
runtime_pm.  If done in the wrong order, the spi_register_master fails if any
probed slave devices issue SPI transactions.
Signed-off-by: NAndy Gross <agross@codeaurora.org>
Acked-by: NIvan T. Ivanov <iivanov@mm-sol.com>
Signed-off-by: NMark Brown <broonie@linaro.org>

This patch fixes the calculation for determining whether to use FIFO or BLOCK
mode.
Signed-off-by: NAndy Gross <agross@codeaurora.org>
Signed-off-by: NMark Brown <broonie@linaro.org>

Make of_device_id array const, because all OF functions
handle it as const.
Signed-off-by: NJingoo Han <jg1.han@samsung.com>
Reviewed-by: NAxel Lin <axel.lin@ingics.com>
Signed-off-by: NMark Brown <broonie@linaro.org>

pm_runtime_get_sync() returns 1 if !CONFIG_PM_RUNTIME.
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Signed-off-by: NMark Brown <broonie@linaro.org>

Current code uses struct spi_qup_device to store spi->mode and spi->chip_select
settings. We can get these settings in spi_qup_transfer_one and spi_qup_set_cs
without using struct spi_qup_device. Refactor the code a bit to remove
spi_qup_setup(), spi_qup_cleanup(), and struct spi_qup_device.
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Tested-by: NIvan T. Ivanov <iivanov@mm-sol.com>
Signed-off-by: NMark Brown <broonie@linaro.org>

The module version is unlikely to be updated, use kernel version should be
enough.
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Acked-by: NIvan T. Ivanov <iivanov@mm-sol.com>
Signed-off-by: NMark Brown <broonie@linaro.org>

Fix below build error when CONFIG_PM_RUNTIME=y:

C [M]  drivers/spi/spi-qup.o
drivers/spi/spi-qup.c: In function 'spi_qup_pm_suspend_runtime':
drivers/spi/spi-qup.c:712:12: error: 'QUP_CLOCK_AUTO_GATE' undeclared (first use in this function)
drivers/spi/spi-qup.c:712:12: note: each undeclared identifier is reported only once for each function it appears in
drivers/spi/spi-qup.c: In function 'spi_qup_pm_resume_runtime':
drivers/spi/spi-qup.c:725:13: error: 'QUP_CLOCK_AUTO_GATE' undeclared (first use in this function)
make[2]: *** [drivers/spi/spi-qup.o] Error 1
make[1]: *** [drivers/spi] Error 2
make: *** [drivers] Error 2
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Signed-off-by: NMark Brown <broonie@linaro.org>

Set master->max_speed_hz then spi core will handle checking transfer speed.
So we can remove the same checking in this driver.

Also remove checking spi->chip_select in spi_qup_setup(), the checking is done
by spi core.
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Acked-by: NIvan T. Ivanov <iivanov@mm-sol.com>
Signed-off-by: NMark Brown <broonie@linaro.org>

This driver uses devm_spi_register_master() so don't explicitly call
spi_master_put() in spi_qup_remove().
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Acked-by: NIvan T. Ivanov <iivanov@mm-sol.com>
Signed-off-by: NMark Brown <broonie@linaro.org>

Qualcomm Universal Peripheral (QUP) core is an AHB slave that
provides a common data path (an output FIFO and an input FIFO)
for serial peripheral interface (SPI) mini-core. SPI in master
mode supports up to 50MHz, up to four chip selects, programmable
data path from 4 bits to 32 bits and numerous protocol variants.

Cc: Alok Chauhan <alokc@codeaurora.org>
Cc: Gilad Avidov <gavidov@codeaurora.org>
Cc: Kiran Gunda <kgunda@codeaurora.org>
Cc: Sagar Dharia <sdharia@codeaurora.org>
Cc: dsneddon@codeaurora.org
Signed-off-by: NIvan T. Ivanov <iivanov@mm-sol.com>
Signed-off-by: NMark Brown <broonie@linaro.org>