aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/spi (follow)
AgeCommit message (Collapse)AuthorFilesLines
2014-03-13spi: sc18is602: Convert to let spi core validate transfer speedAxel Lin1-10/+3
Set master->max_speed_hz and master->min_speed_hz then spi core will handle checking transfer speed. So we can remove the same checking in this driver. This patch also remove testing if hz is 0 because spi->max_speed_hz will be default set to master->min_speed_hz if it was not set. So the transfer speed will never set to 0. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-03-13spi: add xtfpga SPI controller driverMax Filippov3-0/+184
This simple SPI master controller is built into xtfpga bitstreams. It always transfers 16 bit words in SPI mode 0, automatically asserting CS on transfer start and deasserting on end. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-03-12spi: efm32: Clean up non-DT pathsAxel Lin1-23/+8
This is a DT-only driver, so remove all non-DT paths. of_gpio_named_count() may fail, thus also add checking it's return value. efm32_spi_probe_dt() never fails, make it return void. Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-03-11spi: rspi: Add runtime PM support, using spi core auto_runtime_pmGeert Uytterhoeven1-7/+5
Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-03-11spi: sh-msiof: Convert to spi core auto_runtime_pm frameworkGeert Uytterhoeven1-24/+1
Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-03-11spi: sh-hspi: Add missing call to pm_runtime_disable() in failure pathGeert Uytterhoeven1-1/+3
Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-03-10spi: coldfire-qspi: Prevent NULL pointer dereferenceAxel Lin1-2/+7
If pdata->cs_control is NULL, we will hit NULL pointer dereference in mcfqspi_cs_select() and mcfqspi_cs_deselect(). Thus add NULL test for pdata->cs_control in probe(). Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-03-10spi: clps711x: Provide label argument for devm_gpio_requestAxel Lin1-7/+3
The label argument was removed by commit 989847967cd762 spi: clps711x: Use devm_gpio_request(), add it back. This makes it easier to know the gpio usage in /sys/kernel/debug/gpio. Also remove unnecessary gpio_is_valid() checking, devm_gpio_request() returns error if the requested gpio is invalid. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-03-10spi: coldfire-qspi: Enable clock before calling spi_master_resumeAxel Lin1-4/+5
This ensures clock has been enabled before calling spi_master_resume(). while at it, also add checking return value of spi_master_suspend and spi_master_resume because they may fail. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-03-10spi/ti-qspi: Fix return from mmap pathSourav Poddar1-1/+0
mmap resource requirement is only for memory mapped operations. If the user does not populate mmap resource, dont call return, instead we go on for normal spi mode operations. Signed-off-by: Sourav Poddar <sourav.poddar@ti.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-03-07spi: s3c24xx: Add missing spi_master_{resume,suspend} calls to PM callbacksAxel Lin1-1/+6
This is required since commit 2025172e3280 "spi/bitbang: Use core message pump". spi-bitbang now uses core message pump, so it needs to call spi_master_suspend/ spi_master_resume to start/stop the queue while suspend/resume. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-03-07Merge remote-tracking branches 'spi/fix/ath79', 'spi/fix/atmel', 'spi/fix/coldfire', 'spi/fix/fsl-dspi', 'spi/fix/imx' and 'spi/fix/topcliff-pch' into spi-linusMark Brown6-17/+35
2014-03-06spi: pl022: Don't ignore power domain and amba bus at system suspendUlf Hansson1-36/+18
Previously only the resources controlled by the driver were put into low power state at system suspend. Both the amba bus and a potential power domain were ignored. Moreover, while putting the device into low power state we first brought it back to full power, but for no particular reason. To handle both issues above, use pm_runtime_force_suspend|resume() from the system suspend|resume callbacks. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-03-06spi: pl022: Let runtime PM callbacks be available for CONFIG_PMUlf Hansson1-3/+3
Convert to the SET_PM_RUNTIME_PM macro while defining the runtime PM callbacks. This means the callbacks becomes available for both CONFIG_PM_SLEEP and CONFIG_PM_RUNTIME, which is needed to handle the combinations of these scenarios. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-03-06Merge branch 'pm-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm into spi-pl022Mark Brown3-5/+5
2014-03-05spi: fsl-dspi: Use SIMPLE_DEV_PM_OPS macroJingoo Han1-3/+1
Use SIMPLE_DEV_PM_OPS macro in order to make the code simpler. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-03-05spi: bcm63xx-hsspi: Use SIMPLE_DEV_PM_OPS macroJingoo Han1-3/+2
Use SIMPLE_DEV_PM_OPS macro in order to make the code simpler. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-03-05spi: omap-100k: fix spacing coding style issueJingoo Han1-17/+19
Fix the following checkpatch issues. ERROR: space prohibited after that open parenthesis '(' ERROR: space required before the open parenthesis '(' ERROR: trailing statements should be on next line ERROR: space required after that ',' (ctx:VxV) ERROR: spaces required around that '-=' (ctx:VxV) WARNING: sizeof *cs should be sizeof(*cs) Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-03-05spi: atmel: add missing spi_master_{resume,suspend} calls to PM callbacksWenyou Yang1-1/+16
The PM callbacks implemented by the spi-atmel driver don't call spi_master_{resume,suspend}, fix that. Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-03-05spi: coldfire-qspi: Use core message handlingAxel Lin1-47/+34
Convert to use default implementation of transfer_one_message(). Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-03-05spi: coldfire-qspi: Remove unused dev field from struct mcfqspiAxel Lin1-6/+2
Also remove unused *res variable in mcfqspi_remove(). Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-03-05spi: coldfire-qspi: Fix getting correct address for *mcfqspiAxel Lin1-2/+4
dev_get_drvdata() returns the address of master rather than mcfqspi. Fixes: af361079 (spi/coldfire-qspi: Drop extra calls to spi_master_get in suspend/resume functions) Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@linaro.org> Cc: stable@vger.kernel.org
2014-03-05spi: fsl-dspi: Fix getting correct address for masterAxel Lin1-3/+3
Current code set platform drvdata to dspi. However, the code in dspi_suspend() and dspi_resume() assumes the drvdata is the address of master. Fix it by setting platform drvdata to master. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@linaro.org> Cc: stable@vger.kernel.org
2014-03-05spi: atmel: adopt pinctrl supportWenyou Yang1-0/+9
Amend the spi atmel pin controller to optionally take a pin control handle and set the state of the pins to: - "default" on boot, resume and before performing an spitransfer - "sleep" on suspend() This should make it possible to optimize energy usage for the pins both for the suspend/resume cycle Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-03-04spi: core: make zero length transfer valid againAtsushi Nemoto1-3/+2
Zero length transfer becomes invalid since "spi: core: Validate length of the transfers in message" commit, but it should be valid to support an odd device, for example, which requires long delay between chipselect and the first transfer, etc. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Tested-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-03-04spi: xcomm: Remove duplicate code to set default bits_per_word and max speedAxel Lin1-8/+4
In the implementation of __spi_validate(), spi core will set transfer bits_per_word and max speed as spi device default if it is not set for this transfer. So we can remove the same logic in spi_xcomm_setup_transfer(). Also remove a redundant code to initialize is_first variable. Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-03-04spi: sun6i: Set bits_per_word_mask to only support 8 bits word lengthAxel Lin1-0/+1
This controller only supports 8 bits word length. Set bits_per_word_mask so spi core will reject transfers that attempt to use an unsupported bits_per_word value. Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-03-04spi: sun4i: Set bits_per_word_mask to only support 8 bits word lengthAxel Lin1-0/+1
This controller only supports 8 bits word length. Set bits_per_word_mask so spi core will reject transfers that attempt to use an unsupported bits_per_word value. Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-03-03spi: spi-ath79: fix initial GPIO CS line setupGabor Juhos1-2/+2
The 'ath79_spi_setup_cs' function initializes the chip select line of a given SPI device in order to make sure that the device is inactive. If the SPI_CS_HIGH bit is set for a given device, it means that the CS line of that device is active HIGH so it must be set to LOW initially. In case of GPIO CS lines, the 'ath79_spi_setup_cs' function does the opposite of that due to the wrong GPIO flags. Fix the code to use the correct GPIO flags. Reported-by: Ronald Wahl <ronald.wahl@raritan.com> Signed-off-by: Gabor Juhos <juhosg@openwrt.org> Signed-off-by: Mark Brown <broonie@linaro.org> Cc: stable@vger.kernel.org
2014-03-03spi: dw: Convert to let spi core validate transfer speedAxel Lin1-6/+1
Set master->max_speed_hz then spi core will handle checking transfer speed. So we can remove the same checking in this driver. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-03-03spi: atmel: Let spi core handle validating transfer lengthAxel Lin1-8/+0
spi core will handle validating transfer length since commit 4d94bd21b333 "spi: core: Validate length of the transfers in message". So remove the same checking in this driver. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-03-03spi: octeon: Convert to let spi core validate transfer speedAxel Lin1-2/+1
Set master->max_speed_hz then spi core will handle checking transfer speed. The behavior is different from current code when the speed_hz is greater than the maximum transfer speed supported by the controller. Unless there is other good reason, I think we had better make the behavior consistent with what spi core does. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-03-03spi: octeon: Remove struct octeon_spi_setup usageAxel Lin1-62/+7
Current code uses struct octeon_spi_setup to store max_speed_hz, chip_select and mode settings of current spi device. We can always get the same settings in octeon_spi_do_transfer() by msg->spi. So this patch removes struct octeon_spi_setup and octeon_spi_setup, octeon_spi_cleanup functions. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-03-03spi: omap-uwire: Convert to use bits_per_word_maskAxel Lin1-16/+2
Set bits_per_word_mask so spi core will reject transfers that attempt to use an unsupported bits_per_word value. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-03-03spi: atmel: Remove redundant list_empty checkingAxel Lin1-3/+0
This checking is already done in __spi_validate(). Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-03-03spi: sirf: provide a shortcut for spi command-data modeQipan Li1-0/+50
there are many SPI clients which use the following protocal: step 1: send command bytes to clients(rx buffer is empty) step 2: send data bytes to clients or receive data bytes from clients. SiRFprimaII provides a shortcut for this kind of SPI transfer. when tx buf is less or equal than 4 bytes and rx buf is null in a transfer, we think it as 'command' data and use hardware command register for the transfer. here we can save some CPU loading than doing both tx and rx for a normal transfer. Signed-off-by: Qipan Li <Qipan.Li@csr.com> Signed-off-by: Barry Song <Baohua.Song@csr.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-03-03spi: sh-msiof: Kill sh_msiof_spi_bits and sh_msiof_spi_hz functionsAxel Lin1-23/+2
In the implementation of __spi_validate(), spi core will set transfer bits_per_word and max speed as spi device default if it is not set for this transfer. So we can remove the same implementation in this driver. Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-03-03spi: sh-hspi: Remove duplicate code to set default transfer speedAxel Lin1-7/+2
In the implementation of __spi_validate(), spi core will use spi device's max speed as default transfer speed if it is not set for this transfer. So we can remove the same logic in hspi_hw_setup(). Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-03-01spi: orion: Let spi core handle validating transfer lengthAxel Lin1-11/+0
spi core will handle validating transfer length since commit 4d94bd21b333 "spi: core: Validate length of the transfers in message". So remove the same checking in this driver. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-03-01spi: txx9: Let spi core handle validating transfer lengthAxel Lin1-4/+0
spi core will handle validating transfer length since commit 4d94bd21b333 "spi: core: Validate length of the transfers in message". So remove the same checking in this driver. Signed-off-by: Axel Lin <axel.lin@ingics.com> Reviewed-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-02-28spi: txx9: Use devm_ioremap_resource()Jingoo Han1-7/+2
Use devm_ioremap_resource() in order to make the code simpler, and remove redundant return value check of platform_get_resource() because the value is checked by devm_ioremap_resource(). Signed-off-by: Jingoo Han <jg1.han@samsung.com> Reviewed-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-02-28spi: spi-imx: spi_imx_remove: do not disable disabled clocksPhilippe De Muyter1-2/+2
Currently, at module removal, one gets the following warnings: ------------[ cut here ]------------ WARNING: at drivers/clk/clk.c:780 clk_disable+0x18/0x24() Modules linked in: spi_imx(-) [last unloaded: ev76c560] CPU: 1 PID: 16337 Comm: rmmod Tainted: G W 3.10.17-80548-g90191eb-dirty #33 [<80013b4c>] (unwind_backtrace+0x0/0xf8) from [<800115dc>] (show_stack+0x10/0x14) [<800115dc>] (show_stack+0x10/0x14) from [<800257b8>] (warn_slowpath_common+0x4c/0x68) [<800257b8>] (warn_slowpath_common+0x4c/0x68) from [<800257f0>] (warn_slowpath_null+0x1c/0x24) [<800257f0>] (warn_slowpath_null+0x1c/0x24) from [<803f60ec>] (clk_disable+0x18/0x24) [<803f60ec>] (clk_disable+0x18/0x24) from [<7f02c9cc>] (spi_imx_remove+0x54/0x9c [spi_imx]) [<7f02c9cc>] (spi_imx_remove+0x54/0x9c [spi_imx]) from [<8025868c>] (platform_drv_remove+0x18/0x1c) [<8025868c>] (platform_drv_remove+0x18/0x1c) from [<80256f60>] (__device_release_driver+0x70/0xcc) [<80256f60>] (__device_release_driver+0x70/0xcc) from [<80257770>] (driver_detach+0xcc/0xd0) [<80257770>] (driver_detach+0xcc/0xd0) from [<80256d90>] (bus_remove_driver+0x7c/0xc0) [<80256d90>] (bus_remove_driver+0x7c/0xc0) from [<80068668>] (SyS_delete_module+0x144/0x1f8) [<80068668>] (SyS_delete_module+0x144/0x1f8) from [<8000e080>] (ret_fast_syscall+0x0/0x30) ---[ end trace 1f5df9ad54996300 ]--- ------------[ cut here ]------------ WARNING: at drivers/clk/clk.c:780 clk_disable+0x18/0x24() Modules linked in: spi_imx(-) [last unloaded: ev76c560] CPU: 1 PID: 16337 Comm: rmmod Tainted: G W 3.10.17-80548-g90191eb-dirty #33 [<80013b4c>] (unwind_backtrace+0x0/0xf8) from [<800115dc>] (show_stack+0x10/0x14) [<800115dc>] (show_stack+0x10/0x14) from [<800257b8>] (warn_slowpath_common+0x4c/0x68) [<800257b8>] (warn_slowpath_common+0x4c/0x68) from [<800257f0>] (warn_slowpath_null+0x1c/0x24) [<800257f0>] (warn_slowpath_null+0x1c/0x24) from [<803f60ec>] (clk_disable+0x18/0x24) [<803f60ec>] (clk_disable+0x18/0x24) from [<7f02c9e8>] (spi_imx_remove+0x70/0x9c [spi_imx]) [<7f02c9e8>] (spi_imx_remove+0x70/0x9c [spi_imx]) from [<8025868c>] (platform_drv_remove+0x18/0x1c) [<8025868c>] (platform_drv_remove+0x18/0x1c) from [<80256f60>] (__device_release_driver+0x70/0xcc) [<80256f60>] (__device_release_driver+0x70/0xcc) from [<80257770>] (driver_detach+0xcc/0xd0) [<80257770>] (driver_detach+0xcc/0xd0) from [<80256d90>] (bus_remove_driver+0x7c/0xc0) [<80256d90>] (bus_remove_driver+0x7c/0xc0) from [<80068668>] (SyS_delete_module+0x144/0x1f8) [<80068668>] (SyS_delete_module+0x144/0x1f8) from [<8000e080>] (ret_fast_syscall+0x0/0x30) ---[ end trace 1f5df9ad54996301 ]--- Since commit 9e556dcc55774c9a1032f32baa0e5cfafede8b70, "spi: spi-imx: only enable the clocks when we start to transfer a message", clocks are always disabled except when transmitting messages. There is thus no need to disable them at module removal. Fixes: 9e556dcc55774 (spi: spi-imx: only enable the clocks when we start to transfer a message) Signed-off-by: Philippe De Muyter <phdm@macqel.be> Acked-by: Huang Shijie <b32955@freescale.com> Signed-off-by: Mark Brown <broonie@linaro.org> Cc: stable@vger.kernel.org
2014-02-27spi: sh-hspi: Remove hspi_cleanup functionAxel Lin1-11/+0
hspi_cleanup() is doing nothing except print a non-useful debug message, so remove it. Also remove unused hspi2info macro. Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-02-27spi: sh-msiof: Use core message handling instead of spi-bitbangGeert Uytterhoeven2-48/+20
The only remaining feature of spi-bitbang used by this driver is the chipselect() callback, which just does conditional GPIO. This is handled fine by the SPI core's spi_set_cs(), hence switch the driver to use the core message handling through our own transfer_one() method. As the (optional) GPIO CS is no longer deasserted at spi_master.setup() time (through spi_bitbang_setup() and the spi_bitbang.chipselect() callback), we now have to take care of that ourselves. Remove the call to spi_master_put() in sh_msiof_spi_remove(), as our SPI master is now registered using devm_spi_register_master() (spi_bitbang_start() uses the non-managed version). Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org> Acked-by: Magnus Damm <damm@opensource.se> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-02-27spi: sh-msiof: Convert to let spi core validate xfer->bits_per_wordGeert Uytterhoeven1-17/+2
Set bits_per_word_mask so the spi core will reject transfers that attempt to use an unsupported bits_per_word value. Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org> Acked-by: Magnus Damm <damm@opensource.se> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-02-27spi: sh-msiof: Move clock management to (un)prepare_message()Geert Uytterhoeven1-23/+38
Move clock management and pin configuration from the bitbang chipselect() method to the SPI core prepare_message() and unprepare_message() methods. As spi_master.{,un}prepare_message() is guaranteed to be called in matching pairs, the clock management synchronization is no longer needed. As sh_msiof_spi_set_pin_regs() is no longer called at spi_master.setup() time (through spi_bitbang_setup() and the spi_bitbang.chipselect() callback), we now have to take care of that ourselves. Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org> Acked-by: Magnus Damm <damm@opensource.se> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-02-27spi: sh-msiof: Add support for R-Car H2 and M2Geert Uytterhoeven1-3/+20
Add support for the MSIOF variant in the R-Car H2 (r8a7790) and M2 (r8a7791) SoCs. Binding documentation: - Add future-proof "renesas,msiof-<soctype>" compatible values, - The default for "renesas,rx-fifo-size" is 256 on R-Car H2 and M2, - "renesas,tx-fifo-size" and "renesas,rx-fifo-size" are deprecated for soctype-specific bindings, - Add example bindings. Implementation: - MSIOF on R-Car H2 and M2 requires the transmission of dummy data if data is being received only (cfr. "Set SICTR.TSCKE to 1" and "Write dummy transmission data to SITFDR" in paragraph "Transmit and Receive Procedures" of the Hardware User's Manual). - As RX depends on TX, MSIOF on R-Car H2 and M2 also lacks the RSCR register (Receive Clock Select Register), and some bits in the RMDR1 (Receive Mode Register 1) and TMDR2 (Transmit Mode Register 2) registers. - Use the recently introduced SPI_MASTER_MUST_TX flag to enable support for dummy transmission in the SPI core, and to differentiate from other MSIOF implementations in code paths that need this. - New DT compatible values ("renesas,msiof-r8a7790" and "renesas,msiof-r8a7791") are added, as well as new platform device names ("spi_r8a7790_msiof" and "spi_r8a7791_msiof"). - The default RX FIFO size is 256 words on R-Car H2 and M2. This is loosely based on a set of patches from Takashi Yoshii <takasi-y@ops.dti.ne.jp>. Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org> Acked-by: Magnus Damm <damm@opensource.se> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-02-27spi: sh-msiof: Move default FIFO sizes to device ID dataGeert Uytterhoeven1-16/+34
As different variants of MSIOF have different FIFO sizes, move the default FIFO sizes to a new struct sh_msiof_chipdata, pointed to from the device ID data. [Moved ifdef to fix build -- broonie] Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org> Acked-by: Magnus Damm <damm@opensource.se> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-02-27spi: sh-msiof: Improve bindingsGeert Uytterhoeven1-1/+1
Documentation: - Add missing "interrupt-parent", "#address-cells", "#size-cells", and "clocks" properties, - Add missing default values for "num-cs", "renesas,tx-fifo-size" and "renesas,rx-fifo-size", - Add a reference to the pinctrl documentation. Implementation: - As "num-cs" is marked optional, provide a sensible default. Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org> Acked-by: Magnus Damm <damm@opensource.se> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-02-27Merge branch 'topic/dma' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi into HEADMark Brown2-108/+279
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.