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path: root/drivers/spi
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2013-10-07spi: atmel: Fix incorrect error pathSachin Kamat
'irq' was not released when clk_prepare_enable failed. Fix it. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-10-07Merge remote-tracking branch 'spi/topic/devm' into spi-qspiMark Brown
Conflicts: drivers/spi/spi-ti-qspi.c
2013-10-07spi: ti-qspi: one only one interrupt handlerSebastian Andrzej Siewior
The here used irq and threaded irq handler is a complete non-sense. After the status register is read and the source disabled it schedules a thread (the irq thread) to read the status from the variable, invoke complete() and then renable the interrupt. Again: schedule a thread which invokes _only_ complete(). This patch removes this non-sense and we remain with one handler which invokes complete() if needed. The device remove path should now disable the interupts. This has been compile time tested. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Tested-by: Sourav Poddar <sourav.poddar@ti.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-10-03Merge remote-tracking branch 'spi/fix/clps711x' into spi-clps711xMark Brown
Conflicts: drivers/spi/spi-clps711x.c
2013-10-03spi: clps711x: Remove redundant labelSachin Kamat
Remove empty label. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-10-03spi/hspi: fixup Runtime PM enable timingKuninori Morimoto
3e00a09d2fbd64f0ad98e7c8c29dbf9e038fc746 (spi/hspi: Convert to core runtime PM) enabled master->auto_runtime_pm. Then, pm_runtime_enable() is required *before* spi_register_master() calling. This patch fixed it up. Kernel will hang up with "spi_master spi0: Failed to power device: -13" message without this patch. Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-30spi/s3c64xx: Enable GPIO /CS prior to starting hardwareMark Brown
To help with bisection of future refactoring to share more of the code for handling a spi_message pull the enabling of GPIO based /CS prior to all the hardware setup for starting a transfer. Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-30spi/s3c64xx: Factor transfer start out of enable/disable_cs()Mark Brown
The hardware level /CS handling is tied to the start of the data path so is rolled into the same function as we use to manipulate GPIO /CS. In order to support factoring out the /CS handling into the core separate the two and explicitly start transfers separately to the /CS handling. Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-30spi/s3c64xx: Use core cs_gpio fieldMark Brown
Rather than using the driver custom platform data to store the chip select GPIO use the cs_gpio field provided by the SPI core, supporting future refectoring. Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-30spi/s3c64xx: Remove unused gpios field from driver dataMark Brown
Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-30spi/s3c64xx: Check that clock enables succeed on runtime resumeMark Brown
Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-30spi/s3c64xx: Flush FIFOs prior to cleaning up transferMark Brown
Ensure that the FIFOs are fully drained before we deassert /CS or do any delays that have been requested in order to ensure that the behaviour visible on the bus matches that which was requested by the caller. Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-27spi: Use of_property_read_u32Trent Piepho
Instead of getting the raw property, checking the length, and doing endian conversion each time, use the OF function of_property_read_u32() that does all that. Error messages are slightly improved with error codes from of_property_read_u32() for different ways the property may be invalid (missing, too short, etc.) Signed-off-by: Trent Piepho <tpiepho@gmail.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-27spi: simplify call to request_module()Mathias Krause
request_module() can handle format strings on its own, no need to create the full module name ourself. Signed-off-by: Mathias Krause <minipli@googlemail.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-27Merge remote-tracking branch 'spi/fix/s3c64xx' into spi-s3c64xxMark Brown
Conflicts: drivers/spi/spi-s3c64xx.c
2013-09-27spi/s3c64xx: Ensure runtime PM is enabled prior to registrationMark Brown
Otherwise we may try to start transfers immediately and then fail to runtime resume the device causing us not to have clocks enabled. Signed-off-by: Mark Brown <broonie@linaro.org> Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Conflicts: drivers/spi/spi-s3c64xx.c
2013-09-27spi/tegra114: Correct support for cs_changeRhyland Klein
The tegra114 driver wasn't currently handling the cs_change functionality. cs_change is meant to invert the decisions of whether or not to deactivate CS after each transfer. Without cs_change, after every transfer (other than the last in the message) the normal behavior is to leave CS active. For the last transfer, normally CS is deactivated when the transfer is complete. With cs_change set on a transfer (other than last one) CS would be deactivated and the next transfer would need to activate it again. If cs_change was set on the last tranfer in a message, then CS would be left active when the message compeleted. Also, this builds in logic so that if a different device tries to start a transfer while CS is active from a different device, it will abort the previous transfer and start a new one for the new device. This splits tegra_spi_start_transfer_one into 2 functions, the new one being tegra_spi_setup_transfer_one. The setup function is safe to call on all transfers, sets up for the transfer, and handles the special case of the first transfer in a message. In this special case, it needs to know whether or not it needs to activate CS. This work was based on the spi-atmel driver. Signed-off-by: Rhyland Klein <rklein@nvidia.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-27spi/clps711x: drop clk_put for devm_clk_get in spi_clps711x_probe()Wei Yongjun
devm_clk_get() is used so there is no reason to explicitly call clk_put() in probe or remove functions. Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-26spi/qspi: Add dual/quad read mode bit.Sourav Poddar
Add dual/quad read mode bit flag for the master controller. These check will be used in the spi framework to determine whether the master controller can do dual/quad read respectively. Signed-off-by: Sourav Poddar <sourav.poddar@ti.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-26spi: s3c64xx: Allow build on all Samsung platformsMateusz Krawczuk
Replace all symbols by simple dependency PLAT_SAMSUNG. Signed-off-by: Mateusz Krawczuk <m.krawczuk@partner.samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-26spi: txx9: use devm_spi_register_master()Jingoo Han
Use devm_spi_register_master() to make cleanup paths simpler, and remove a duplicate put. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-26spi: ti-qspi: use devm_spi_register_master()Jingoo Han
Use devm_spi_register_master() to make cleanup paths simpler, and remove unnecessary remove(). Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-26spi: tegra20-slink: use devm_spi_register_master()Jingoo Han
Use devm_spi_register_master() to make cleanup paths simpler. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-26spi: tegra20-sflash: use devm_spi_register_master()Jingoo Han
Use devm_spi_register_master() to make cleanup paths simpler. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-26spi: tegra114: use devm_spi_register_master()Jingoo Han
Use devm_spi_register_master() to make cleanup paths simpler. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-26spi: sh-hspi: use devm_spi_register_master()Jingoo Han
Use devm_spi_register_master() to make cleanup paths simpler. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-26spi: pxa2xx: use devm_spi_register_master()Jingoo Han
Use devm_spi_register_master() to make cleanup paths simpler. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-26spi: pl022: use devm_spi_register_master()Jingoo Han
Use devm_spi_register_master() to make cleanup paths simpler. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-26spi: orion: use devm_spi_register_master()Jingoo Han
Use devm_spi_register_master() to make cleanup paths simpler. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Acked-by: Jason Cooper <jason@lakedaemon.net> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-26spi: omap2-mcspi: use devm_spi_register_master()Jingoo Han
Use devm_spi_register_master() to make cleanup paths simpler. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-26spi: omap-100k: use devm_spi_register_master()Jingoo Han
Use devm_spi_register_master() to make cleanup paths simpler. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-26spi: octeon: use devm_spi_register_master()Jingoo Han
Use devm_spi_register_master() to make cleanup paths simpler. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-26spi: mxs: use devm_spi_register_master()Jingoo Han
Use devm_spi_register_master() to make cleanup paths simpler, and remove a duplicate put. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-26spi: mpc512x: use devm_spi_register_master()Jingoo Han
Use devm_spi_register_master() to make cleanup paths simpler, and remove a duplicate put. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-26spi: ep93xx: use devm_spi_register_master()Jingoo Han
Use devm_spi_register_master() to make cleanup paths simpler. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-26spi: clps711x: use devm_spi_register_master()Jingoo Han
Use devm_spi_register_master() to make cleanup paths simpler. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-26spi: bfin-v3: use devm_spi_register_master()Jingoo Han
Use devm_spi_register_master() to make cleanup paths simpler. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Acked-by: Scott Jiang <scott.jiang.linux@gmail.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-26spi: bcm63xx: use devm_spi_register_master()Jingoo Han
Use devm_spi_register_master() to make cleanup paths simpler, and remove a duplicate put. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-26spi: bcm2835: use devm_spi_register_master()Jingoo Han
Use devm_spi_register_master() to make cleanup paths simpler, and remove a duplicate put. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-26Merge remote-tracking branch 'spi/topic/pl022' into spi-devmMark Brown
2013-09-26Merge remote-tracking branch 'spi/fix/clps711x' into spi-devmMark Brown
2013-09-24spi: spi-topcliff-pch: fix a pci_iomap() checkDan Carpenter
If pci_iomap() returns NULL, adding "PCH_ADDRESS_SIZE * plat_dev->id" can make it non-NULL which breaks the error handling. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-23spi: efm32: Don't call kfree() after spi_master_put()Axel Lin
Calling kfree() to clean up the memory obtained from spi_alloc_master() is wrong as this is done in spi_master_release() when spi_master->dev's refcount reaches zero. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-23spi: s3c64xx: Add missing compatiblesMateusz Krawczuk
Add compatibles for s3c6410, s5pc100 and s5pc110/s5pv210 boards. Signed-off-by: Mateusz Krawczuk <m.krawczuk@partner.samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-18spi/s3c64xx: Use managed registrationMark Brown
Also improve the error reporting on failure and remove a duplicate put. This provides a small code saving. Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-17spi: efm32: add spi_bitbang_stop to device remove callbackUwe Kleine-König
This call is needed to cleanup the resources requested by spi_bitbang_start in the probe callback. Noticed-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-17spi: bitbang: Let spi_bitbang_start() take a reference to masterAxel Lin
Many drivers that use bitbang library have a leak on probe error paths. This is because once a spi_master_get() call succeeds, we need an additional spi_master_put() call to free the memory. Fix this issue by moving the code taking a reference to master to spi_bitbang_start(), so spi_bitbang_start() will take a reference to master on success. With this change, the caller is responsible for calling spi_bitbang_stop() to decrement the reference and spi_master_put() as counterpart of spi_alloc_master() to prevent a memory leak. So now we have below patten for drivers using bitbang library: probe: spi_alloc_master -> Init reference count to 1 spi_bitbang_start -> Increment reference count remove: spi_bitbang_stop -> Decrement reference count spi_master_put -> Decrement reference count (reference count reaches 0) Fixup all users accordingly. Signed-off-by: Axel Lin <axel.lin@ingics.com> Suggested-by: Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de> Acked-by: Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-17Merge remote-tracking branch 'spi/topic/devm' into spi-s3c64xxMark Brown
2013-09-17spi: core: Add devm_spi_register_master()Mark Brown
Help simplify the cleanup code for SPI master drivers by providing a managed master registration function, ensuring that the master is automatically unregistered whenever the device is unbound. Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-17spi: tegra: Use DIV_ROUND_UP instead of open codedAxel Lin
This also makes the intention more clear. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@linaro.org>
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