30 Dec, 2020
1 commit
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[ Upstream commit ee5558a9084584015c8754ffd029ce14a5827fa8 ]
pm_runtime_get_sync will increment pm usage counter even it
failed. Forgetting to pm_runtime_put_noidle will result in
reference leak in img_spfi_resume, so we should fix it.Fixes: deba25800a12b ("spi: Add driver for IMG SPFI controller")
Signed-off-by: Zhang Qilong
Link: https://lore.kernel.org/r/20201102145651.3875-1-zhangqilong3@huawei.com
Signed-off-by: Mark Brown
Signed-off-by: Sasha Levin
02 Jul, 2020
1 commit
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This converts the IMG SPFI SPI driver to use GPIO descriptors
as obtained from the core instead of GPIO numbers.The driver was already relying on the core code to look up
the GPIO numbers from the device tree and allocate memory for
storing state etc. By moving to use descriptors handled by
the core we can delete the setup/cleanup functions and
the device state handler that were only dealing with this.Signed-off-by: Linus Walleij
Cc: Ionela Voinescu
Cc: Sifan Naeem
Link: https://lore.kernel.org/r/20200625201422.208640-1-linus.walleij@linaro.org
Signed-off-by: Mark Brown
16 Dec, 2019
1 commit
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dma_request_slave_channel() is a wrapper on top of dma_request_chan()
eating up the error code.By using dma_request_chan() directly the driver can support deferred
probing against DMA.Signed-off-by: Peter Ujfalusi
Link: https://lore.kernel.org/r/20191212135550.4634-5-peter.ujfalusi@ti.com
Signed-off-by: Mark Brown
06 Nov, 2019
1 commit
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The channels spfi->tx_ch and spfi->rx_ch are not set to NULL after they
are released. As a result, they will be released again, either on the
error handling branch in the same function or in the corresponding
remove function, i.e. img_spfi_remove(). This patch fixes the bug by
setting the two members to NULL.Signed-off-by: Pan Bian
Link: https://lore.kernel.org/r/1573007769-20131-1-git-send-email-bianpan2016@163.com
Signed-off-by: Mark Brown
05 Jun, 2019
1 commit
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Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms and conditions of the gnu general public license
version 2 as published by the free software foundationextracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 101 file(s).
Signed-off-by: Thomas Gleixner
Reviewed-by: Allison Randal
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190531190113.822954939@linutronix.de
Signed-off-by: Greg Kroah-Hartman
30 Jul, 2018
1 commit
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Even if the chip select line is not controlled by the SPFI
hardware, the device select bits need to be set to specify
the chip select line in use for the hardware to know what
parameters to use for the current transfer.Signed-off-by: Ionela Voinescu
Signed-off-by: Andreas Färber
Signed-off-by: Mark Brown
28 Jul, 2016
1 commit
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The call to spi_master_put() in img_spfi_remove() is redundant since
the master is registered using devm_spi_register_master() and no
reference hold by using spi_master_get() in img_spfi_remove().This is detected by Coccinelle semantic patch.
Signed-off-by: Wei Yongjun
Signed-off-by: Mark Brown
31 Aug, 2015
2 commits
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…img-spfi' and 'spi/topic/mpc512x-psc' into spi-next
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…g-spfi', 'spi/fix/omap2-mcspi', 'spi/fix/orion' and 'spi/fix/xilinx' into spi-linus
06 Aug, 2015
1 commit
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drivers/spi/spi-img-spfi.c: In function 'img_spfi_setup':
drivers/spi/spi-img-spfi.c:446: warning: 'ret' may be used
uninitialized in this function.Fixes: commit b03ba9e314c1 ("spi: img-spfi: fix multiple calls to request gpio")
Signed-off-by: Sifan Naeem
Signed-off-by: Mark Brown
Cc: stable@vger.kernel.org
05 Aug, 2015
1 commit
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spfi_setup may be called many times by the spi framework, but
gpio_request_one can only be called once without freeing, repeatedly
calling gpio_request_one will cause an error to be thrown, which
causes the request to spi_setup to be marked as failed.We can have a per-spi_device flag that indicates whether or not the
gpio has been requested. If the gpio has already been requested use
gpio_direction_output to set the direction of the gpio.Fixes: 8c2c8c03cdcb ("spi: img-spfi: Control CS lines with GPIO")
Signed-off-by: Sifan Naeem
Signed-off-by: Mark Brown
Cc: stable@vger.kernel.org
29 Jul, 2015
1 commit
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Calling spfi_wait_all_done is not required if the transfer has timed
out before all data is transferred.spfi_wait_all_done polls for Alldone interrupt which is triggered to
mark the transfer as complete and to indicate it is now safe to issue
a new transfer.Fixes: 8c2c8c0 ("spi: img-spfi: Control CS lines with GPIO")
Signed-off-by: Sifan Naeem
Reviewed-by: Andrew Bresticker
Signed-off-by: Mark Brown
Cc: stable@vger.kernel.org
07 Jul, 2015
1 commit
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Maximum speed supported by spfi is limited to 1/4 of the spfi clock.
But in some SoCs the maximum speed supported by the spfi block can
be limited to less than 1/4 of the spfi clock. In such cases we have
to define the limit in the device tree so that the driver can pick
it up.Signed-off-by: Sifan Naeem
Signed-off-by: Mark Brown
22 Jun, 2015
1 commit
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Setting the Same Edge bit indicates to the spfi block to receive and
transmit data on the same edge of the spfi clock, which in turn
doubles the operating frequency of spfi.The maximum supported frequency is limited to 1/4th of the spfi input
clock, but without this bit set the maximum would be 1/8th of the
input clock.The current driver calculates the divisor with maximum speed at 1/4th
of the input clock, this would fail if the requested frequency is
higher than 1/8 of the input clock. Any requests for 1/8th of the
input clock would still pass.Fixes: 8543d0e72d43 ("spi: img-spfi: Limit bit clock to 1/4th of input clock")
Signed-off-by: Sifan Naeem
Signed-off-by: Mark Brown
Cc:
09 Apr, 2015
5 commits
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When the CONTINUE bit is set, the interrupt status we are polling to
identify if a transaction has finished can be sporadic. Even though
the transfer has finished, the interrupt status may erroneously
indicate that there is still data in the FIFO. This behaviour causes
random timeouts in large PIO transfers.Instead of using the CONTINUE bit to control the CS lines, use the SPI
core's CS GPIO handling. Also, now that the CONTINUE bit is not being
used, we can poll for the ALLDONE interrupt to indicate transfer
completion.Signed-off-by: Sifan Naeem
Signed-off-by: Ezequiel Garcia
Signed-off-by: Andrew Bresticker
Signed-off-by: Mark Brown -
…onie/spi into spi-img-spfi
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Imagination has recommended that the SPFI controller be reset after
each message, regardless of success or failure. Do this in an
unprepare_message() callback.Signed-off-by: Andrew Bresticker
Signed-off-by: Mark Brown -
The driver can be greatly simplified by moving the transfer timeout
handling to a handle_err() callback.Signed-off-by: Ezequiel Garcia
Signed-off-by: Andrew Bresticker
Signed-off-by: Mark Brown -
Linux 4.0-rc7
08 Apr, 2015
1 commit
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Setting the transfer length in the TRANSACTION register after the
CONTROL register is programmed causes intermittent timeout issues in
SPFI transfers when using the SPI framework to control the CS GPIO
lines. To avoid this issue, set transfer length before programming
the CONTROL register.Signed-off-by: Sifan Naeem
Signed-off-by: Andrew Bresticker
Signed-off-by: Mark Brown
07 Apr, 2015
2 commits
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Although the SPFI BITCLK divider supports a value of up to 255, only
values up to 128 are usable. This results in a maximum possible bit
clock rate of 1/4th the input clock rate.Signed-off-by: Andrew Bresticker
Signed-off-by: Mark Brown -
In preparation for switching to using the SPI core's CS GPIO handling,
move setup of the PORT_STATE register, which must be configured before
CS is asserted, to a prepare_message() callback.Signed-off-by: Ezequiel Garcia
Signed-off-by: Andrew Bresticker
Signed-off-by: Mark Brown
03 Mar, 2015
2 commits
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Removing the udelay between setting and clearing the soft reset bit in
the spfi control register as it is not required.Signed-off-by: Sifan Naeem
Reviewed-by: Andrew Bresticker
Signed-off-by: Mark Brown -
Maximum transfer length supported by SPFI is 65535, this is limited
by the number of bits available in SPFI TSize register to represent
the transfer size.
For transfer requests larger than the maximum supported the driver
will return an invalid argument error.Signed-off-by: Sifan Naeem
Reviewed-by: Andrew Bresticker
Signed-off-by: Mark Brown
24 Dec, 2014
2 commits
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Since the 32-bit FIFO is deeper (64 bytes) than the 8-bit FIFO (16 bytes),
use the 32-bit FIFO when there are at least 32 bits remaining to be
transferred in PIO mode or when the transfer length is 32-bit aligned
in DMA mode.Signed-off-by: Andrew Bresticker
Signed-off-by: Mark Brown -
A 1-byte burst size is rather inefficient and has been shown to cause
TX issues during testing. Increase the DMA burst size to 4-bytes for
both RX and TX DMA when using the 8-bit FIFO.Signed-off-by: Andrew Bresticker
Signed-off-by: Mark Brown
23 Dec, 2014
1 commit
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It is recommended that the SPFI controller be enabled (i.e. setting
SPFI_EN in SPFI_CONTROL) before TX DMA begins.Signed-off-by: Andrew Bresticker
Signed-off-by: Mark Brown
19 Dec, 2014
1 commit
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A couple of new CONFIG_PM_RUNTIME users have been added recently
in the SPI subsystem.However, after commit b2b49ccbdd54 (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/ (again).Signed-off-by: Rafael J. Wysocki
Acked-by: Mark Brown
17 Nov, 2014
1 commit
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Add support for the Synchronous Peripheral Flash Interface (SPFI) master
controller found on IMG SoCs. The SPFI controller supports 5 chip-select
lines and single/dual/quad mode SPI transfers.Signed-off-by: Andrew Bresticker
Signed-off-by: Mark Brown