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path: root/drivers/spi/spi-dw.c
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2014-11-26Merge remote-tracking branches 'spi/fix/dw' and 'spi/fix/sirf' into spi-linusMark Brown1-5/+1
2014-11-07spi: dw: Fix dynamic speed change.Thor Thayer1-5/+1
An IOCTL call that calls spi_setup() and then dw_spi_setup() will overwrite the persisted last transfer speed. On each transfer, the SPI speed is compared to the last transfer speed to determine if the clock divider registers need to be updated (did the speed change?). This bug was observed with the spidev driver using spi-config to update the max transfer speed. This fix: Don't overwrite the persisted last transaction clock speed when updating the SPI parameters in dw_spi_setup(). On the next transaction, the new speed won't match the persisted last speed and the hardware registers will be updated. On initialization, the persisted last transaction clock speed will be 0 but will be updated after the first SPI transaction. Move zeroed clock divider check into clock change test because chip->clk_div is zero on startup and would cause a divide-by-zero error. The calculation was wrong as well (can't support odd #). Reported-by: Vlastimil Setka <setka@vsis.cz> Signed-off-by: Vlastimil Setka <setka@vsis.cz> Signed-off-by: Thor Thayer <tthayer@opensource.altera.com> Signed-off-by: Mark Brown <broonie@kernel.org> Cc: stable@vger.kernel.org
2014-10-08spi: dw: Initialize of_node to discover DT node childrenThor Thayer1-0/+1
The of_node element must be initialized to enable discovery of node children which takes place in the of_register_spi_devices() function. Signed-off-by: Thor Thayer <tthayer@opensource.altera.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-03Merge remote-tracking branches 'spi/topic/davinci', 'spi/topic/doc', ↵Mark Brown1-26/+22
'spi/topic/dw' and 'spi/topic/fsl' into spi-next
2014-10-03Merge remote-tracking branches 'spi/topic/bcm53xx', 'spi/topic/cadence', ↵Mark Brown1-7/+9
'spi/topic/checkpatch' and 'spi/topic/clps711x' into spi-next
2014-09-24spi: dw: fix style of code in few placesAndy Shevchenko1-4/+3
Make comments be surrounded by spaces and move part of code to one line where it suits 80 characters. There is no functional changes. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-24spi: dw: introduce support of loopback modeAndy Shevchenko1-1/+4
For testing purposes it's good to have a loopback mode enabled. The patch adds necessary bits for that. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-16Merge remote-tracking branches 'spi/fix/davinci', 'spi/fix/dw', ↵Mark Brown1-2/+10
'spi/fix/fsl', 'spi/fix/pl022', 'spi/fix/rockchip' and 'spi/fix/sirf' into spi-linus
2014-09-13spi: dw: don't use mrst prefix anymoreAndy Shevchenko1-17/+15
Since driver is used on other platforms and debugfs stuff would be useful there as well let's substitute mrst_ by dw_ where it suits. Additionally let's use SPI master device name when print registers dump. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-13Merge branch 'topic/checkpatch' of ↵Mark Brown1-7/+9
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi into spi-dw
2014-09-13spi: dw: remove FSF addressAndy Shevchenko1-4/+0
There is no need to keep FSF address in the head of the file. While here, fix few typos in the header. There is no functional change. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-03spi: dw: Fix checkpatch issueJingoo Han1-7/+9
Fix the following checkpatch warnings. WARNING: debugfs_remove_recursive(NULL) is safe this check is probably not required WARNING: min() should probably be min_t(u32, rx_left, dw_readw(dws, DW_SPI_RXFLR)) WARNING: else is not generally useful after a break or return WARNING: Missing a blank line after declarations WARNING: void function return statements are not generally useful Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-01spi: dw: Don't use devm_kzalloc in master->setup callbackAxel Lin1-2/+10
device_add() expects that any memory allocated via devm_* API is only done in the device's probe function. Fix below boot warning: WARNING: CPU: 1 PID: 1 at drivers/base/dd.c:286 driver_probe_device+0x2b4/0x2f4() Modules linked in: CPU: 1 PID: 1 Comm: swapper/0 Not tainted 3.16.0-10474-g835c90b-dirty #160 [<c0016364>] (unwind_backtrace) from [<c001251c>] (show_stack+0x20/0x24) [<c001251c>] (show_stack) from [<c04eaefc>] (dump_stack+0x7c/0x98) [<c04eaefc>] (dump_stack) from [<c0023d4c>] (warn_slowpath_common+0x78/0x9c) [<c0023d4c>] (warn_slowpath_common) from [<c0023d9c>] (warn_slowpath_null+0x2c/0x34) [<c0023d9c>] (warn_slowpath_null) from [<c0302c60>] (driver_probe_device+0x2b4/0x2f4) [<c0302c60>] (driver_probe_device) from [<c0302d90>] (__device_attach+0x50/0x54) [<c0302d90>] (__device_attach) from [<c0300e60>] (bus_for_each_drv+0x54/0x9c) [<c0300e60>] (bus_for_each_drv) from [<c0302958>] (device_attach+0x84/0x90) [<c0302958>] (device_attach) from [<c0301f10>] (bus_probe_device+0x94/0xb8) [<c0301f10>] (bus_probe_device) from [<c03000c0>] (device_add+0x434/0x4fc) [<c03000c0>] (device_add) from [<c0342dd4>] (spi_add_device+0x98/0x164) [<c0342dd4>] (spi_add_device) from [<c03444a4>] (spi_register_master+0x598/0x768) [<c03444a4>] (spi_register_master) from [<c03446b4>] (devm_spi_register_master+0x40/0x80) [<c03446b4>] (devm_spi_register_master) from [<c0346214>] (dw_spi_add_host+0x1a8/0x258) [<c0346214>] (dw_spi_add_host) from [<c0346920>] (dw_spi_mmio_probe+0x1d4/0x294) [<c0346920>] (dw_spi_mmio_probe) from [<c0304560>] (platform_drv_probe+0x3c/0x6c) [<c0304560>] (platform_drv_probe) from [<c0302a98>] (driver_probe_device+0xec/0x2f4) [<c0302a98>] (driver_probe_device) from [<c0302d3c>] (__driver_attach+0x9c/0xa0) [<c0302d3c>] (__driver_attach) from [<c0300f0c>] (bus_for_each_dev+0x64/0x98) [<c0300f0c>] (bus_for_each_dev) from [<c0302518>] (driver_attach+0x2c/0x30) [<c0302518>] (driver_attach) from [<c0302134>] (bus_add_driver+0xdc/0x1f4) [<c0302134>] (bus_add_driver) from [<c03035c8>] (driver_register+0x88/0x104) [<c03035c8>] (driver_register) from [<c030445c>] (__platform_driver_register+0x58/0x6c) [<c030445c>] (__platform_driver_register) from [<c0700f00>] (dw_spi_mmio_driver_init+0x18/0x20) [<c0700f00>] (dw_spi_mmio_driver_init) from [<c0008914>] (do_one_initcall+0x90/0x1d4) [<c0008914>] (do_one_initcall) from [<c06d7d90>] (kernel_init_freeable+0x178/0x248) [<c06d7d90>] (kernel_init_freeable) from [<c04e687c>] (kernel_init+0x18/0xfc) [<c04e687c>] (kernel_init) from [<c000ecd8>] (ret_from_fork+0x14/0x20) Reported-by: Thor Thayer <tthayer@opensource.altera.com> Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@kernel.org> Cc: stable@vger.kernel.org
2014-08-27spi: dw: fix kernel crash due to NULL pointer dereferenceAndy Shevchenko1-1/+1
The obvious fix after the commit d9c73bb8a3a5 "spi: dw: add support for gpio controlled chip select". This patch fixes the issue by using locally defined temporary variable. Fixes: d9c73bb8a3a5 (spi: dw: add support for gpio controlled chip select) Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Mark Brown <broonie@linaro.org> Cc: <stable@vger.kernel.org>
2014-05-12spi: dw: Remove unused dw_spi_cleanup functionAxel Lin1-6/+0
The dw_spi_cleanup() function was removed by commit c63f5da00845 "spi: dw: Don't call kfree for memory allocated by devm_kzalloc". commit ec37e8e1f0e3 "spi: dw: migrate to generic queue infrastructure" added dw_spi_cleanup() but never use it. So now I got below build warning: CC [M] drivers/spi/spi-dw.o drivers/spi/spi-dw.c:609:13: warning: 'dw_spi_cleanup' defined but not used [-Wunused-function] Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by: Baruch Siach <baruch@tkos.co.il> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-04-24spi: dw: add support for gpio controlled chip selectBaruch Siach1-6/+12
Also, use this opportunity to let spi_chip_sel() handle chip-select deactivation as well. Signed-off-by: Baruch Siach <baruch@tkos.co.il> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-04-24spi: dw: migrate to generic queue infrastructureBaruch Siach1-168/+15
Signed-off-by: Baruch Siach <baruch@tkos.co.il> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-03-30Merge remote-tracking branches 'spi/topic/drivers', 'spi/topic/dw', ↵Mark Brown1-15/+2
'spi/topic/efm32', 'spi/topic/ep93xx', 'spi/topic/fsl', 'spi/topic/fsl-dspi', 'spi/topic/fsl-espi' and 'spi/topic/gpio' into spi-next
2014-03-28spi: dw: Don't call kfree for memory allocated by devm_kzallocAxel Lin1-7/+0
With devm_kzalloc, the memory is automatically freed when spi_device detach from the bus. Fixes: commit 43f627ac9de42 (spi: dw: fix memory leak on error path) Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by: Baruch Siach <baruch@tkos.co.il> Signed-off-by: Mark Brown <broonie@linaro.org> Cc: stabe@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>
2014-02-23spi: Use list_last_entry at appropriate placesAxel Lin1-2/+1
Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-12-31spi: dw: fix memory leak on error pathBaruch Siach1-2/+3
Signed-off-by: Baruch Siach <baruch@tkos.co.il> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-12-31spi: dw: use managed resourcesBaruch Siach1-14/+6
Migrate mmio code and core driver to managed resources to reduce boilerplate error handling code. Also, handle clk_enable() failure while at it, and drop unused dw_spi iolen field. Signed-off-by: Baruch Siach <baruch@tkos.co.il> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-12-30spi: dw: drop unused struct dw_spi fieldBaruch Siach1-1/+0
Signed-off-by: Baruch Siach <baruch@tkos.co.il> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-10-16spi: Don't break user-visible strings to multiple source lines in driversJarkko Nikula1-2/+2
User-visible strings are more difficult to grep from sources if they are separated to multiple source lines. This is worse than over 80 columns long line code style violation. Fix this by making those to single-line strings or by breaking them between variables. While at there, convert if (printk_ratelimit()) dev_warn() to use dev_warn_ratelimited in spi-pxa2xx.c. Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-05-29spi: convert drivers to use bits_per_word_maskStephen Warren1-22/+4
Fill in the recently added spi_master.bits_per_word_mask field in as many drivers as possible. Make related cleanups, such as removing any redundant error-checking, or empty setup callbacks. Signed-off-by: Stephen Warren <swarren@wwwdotorg.org> Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-12-07spi: Remove HOTPLUG section attributesGrant Likely1-3/+3
CONFIG_HOTPLUG is going away as an option. As result the __dev* markings will be going away. Remove use of __devinit, __devexit_p, __devinitdata, __devinitconst, and __devexit. Bill Pemberton has done most of the legwork on this series. I've used his script to purge the attributes from the drivers/gpio tree. Reported-by: Bill Pemberton <wfp5p@virginia.edu> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2012-04-05simple_open: automatically convert to simple_open()Stephen Boyd1-7/+1
Many users of debugfs copy the implementation of default_open() when they want to support a custom read/write function op. This leads to a proliferation of the default_open() implementation across the entire tree. Now that the common implementation has been consolidated into libfs we can replace all the users of this function with simple_open(). This replacement was done with the following semantic patch: <smpl> @ open @ identifier open_f != simple_open; identifier i, f; @@ -int open_f(struct inode *i, struct file *f) -{ ( -if (i->i_private) -f->private_data = i->i_private; | -f->private_data = i->i_private; ) -return 0; -} @ has_open depends on open @ identifier fops; identifier open.open_f; @@ struct file_operations fops = { ... -.open = open_f, +.open = simple_open, ... }; </smpl> [akpm@linux-foundation.org: checkpatch fixes] Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Julia Lawall <Julia.Lawall@lip6.fr> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-10-31spi: Add module.h to implicit users in drivers/spiPaul Gortmaker1-0/+1
We are clipping down the presence of module.h, since it was everywhere. If you really need it, you better call it out, as per this changeset. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2011-09-21spi: spi-dw: fix all sparse warningsH Hartley Sweeten1-31/+31
The dw_{read,write}[lw] macros produce sparse warnings everytime they are used. The "read" ones cause: warning: cast removes address space of expression warning: incorrect type in argument 1 (different address spaces) expected void const volatile [noderef] <asn:2>*addr got unsigned int *<noident> And the "write" ones: warning: cast removes address space of expression warning: incorrect type in argument 2 (different address spaces) expected void volatile [noderef] <asn:2>*addr got unsigned int *<noident> Fix this by removing struct dw_spi_reg and converting all the register offsets to #defines. Then convert the macros into inlined functions so that proper type checking can occur. While here, also fix the three sparse warnings in spi-dw-mid.c due to the return value of ioremap_nocache being stored in a u32 * not a void __iomem *. With these changes the spi-dw* files all build with no sparse warnings. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Acked-by: Feng Tang <feng.tang@intel.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-07-08spi/dw: Add spi number into spi irq descLiu, ShuoX1-1/+3
Signed-off-by: ShuoX Liu <shuox.liu@intel.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-06-06spi: reorganize driversGrant Likely1-0/+936
Sort the SPI makefile and enforce the naming convention spi_*.c for spi drivers. This change also rolls the contents of atmel_spi.h into the .c file since there is only one user of that particular include file. v2: - Use 'spi-' prefix instead of 'spi_' to match what seems to be be the predominant pattern for subsystem prefixes. - Clean up filenames in Kconfig and header comment blocks Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Wolfram Sang <w.sang@pengutronix.de> Acked-by: Linus Walleij <linus.walleij@linaro.org>
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