- 23 9月, 2009 4 次提交
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This makes the PL022 driver a default choice for any RealView and Versatile boards plus the integrator IMPD1 which all contain the PL022 PrimeCell. This will make it a default choice if and only if a user selects SPI support for their board. Signed-off-by: NLinus Walleij <linus.walleij@stericsson.com> Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Steven A. Falco 提交于
This adds a SPI driver for the SPI controller found in the IBM/AMCC 4xx PowerPC's. Signed-off-by: NStefan Roese <sr@denx.de> Signed-off-by: NWolfgang Ocker <weo@reccoware.de> Acked-by: NJosh Boyer <jwboyer@linux.vnet.ibm.com> Signed-off-by: NSteven A. Falco <sfalco@harris.com> Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Jouni Hogander 提交于
Convert bit shifted values into BIT format Signed-off-by: NJouni Hogander <jouni.hogander@nokia.com> Signed-off-by: NTony Lindgren <tony@atomide.com> Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Sascha Hauer 提交于
This driver is in a non working state at the moment and will be replaced by a bitbang driver which can also handle the newer i.MX variants Signed-off-by: NSascha Hauer <s.hauer@pengutronix.de> Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Acked-by: NDavid Brownell <david-b@pacbell.net> Acked-by: NAndrea Paterniani <a.paterniani@swapp-eng.it> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 21 9月, 2009 1 次提交
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由 Joe Perches 提交于
Signed-off-by: NJoe Perches <joe@perches.com> Signed-off-by: NJiri Kosina <jkosina@suse.cz>
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- 19 8月, 2009 2 次提交
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由 Ben Dooks 提交于
Since the changes to the bitbang driver, there is the possibility we will be called with either the speed_hz or bpw values zero. We take these to mean that the default values (8 bits per word, or maximum bus speed). Signed-off-by: NBen Dooks <ben@simtec.co.uk> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Ben Dooks 提交于
Currently the clock rate calculation may round as pleased, which means that it is possible that we will round down and end up with a faster clock rate than intended. Change the calculation to use DIV_ROUND_UP() to ensure that we end up with a clock rate either the same as or lower than the user requested one. Signed-off-by: NBen Dooks <ben@simtec.co.uk> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 30 7月, 2009 2 次提交
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由 Eero Nurkkala 提交于
When data is read through DMA, the last element must be read separately through the RX register. It cannot be transferred by the DMA. For further details see e.g. OMAP35x TRM (table 19-16). Without the fix the driver causes extra clocks to be clocked to the bus after DMA RX operations. This can cause interesting behaviour with some devices. Signed-off-by: NJuuso Oikarinen <juuso.oikarinen@nokia.com> Signed-off-by: NEero Nurkkala <ext-eero.nurkkala@nokia.com> [aaro.koskinen@nokia.com: Simplified the patch while keeping the idea.] Signed-off-by: NAaro Koskinen <aaro.koskinen@nokia.com> Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Jouni Hogander 提交于
Currently mcspi wake-ups are not enabled. This might cause cases where OMAP is not waking up on mcspi events. Signed-off-by: NJouni Hogander <jouni.hogander@nokia.com> Signed-off-by: NTony Lindgren <tony@atomide.com> Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 11 7月, 2009 1 次提交
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由 Huang Weiyi 提交于
Remove duplicated #include('s) in drivers/spi/amba-pl022.c Signed-off-by: NHuang Weiyi <weiyi.huang@gmail.com> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 01 7月, 2009 3 次提交
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由 David Brownell 提交于
Bugfix to spi_bitbang infrastructure: make sure to always set transfer parameters on the first pass through the message's per-transfer loop. This can matter with drivers that replace the per-word or per-buffer transfer primitives, on busses with multiple SPI devices. Previously, this could have started messages using the settings left after previous messages. The problem was observed when a high speed chip (m25p80 type flash) was running very slowly because a low speed device (avr8 microcontroller) had previously used the bus. Similar faults could have driven the low speed device too fast, or used an unexpected word size. Acked-by: NSteven A. Falco <sfalco@harris.com> Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 David Brownell 提交于
Add a new spi_master.flags word listing constraints relevant to that controller. Define the first constraint bit: a half duplex restriction. Include that constraint in the OMAP1 MicroWire controller driver. Have the mmc_spi host be the first customer of this flag. Its coding relies heavily on full duplex transfers, so it must fail when the underlying controller driver won't perform them. (The spi_write_then_read routine could use it too: use the temporarily-withdrawn full-duplex speedup unless this flag is set, in which case the existing code applies. Similarly, any spi_master implementing only SPI_3WIRE should set the flag.) Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 David Brownell 提交于
Add two new spi_device.mode bits to accomodate more protocol options, and pass them through to usermode drivers: * SPI_NO_CS ... a second 3-wire variant, where the chipselect line is removed instead of a data line; transfers are still full duplex. This obviously has STRONG protocol implications since the chipselect transitions can't be used to synchronize state transitions with the SPI master. * SPI_READY ... defines open drain signal that's pulled low to pause the clock. This defines a 5-wire variant (normal 4-wire SPI plus READY) and two 4-wire variants (READY plus each of the 3-wire flavors). Such hardware flow control can be a big win. There are ADC converters and flash chips that expose READY signals, but not many host controllers support it today. The spi_bitbang code should be changed to use SPI_NO_CS instead of its current nonportable hack. That's a mode most hardware can easily support (unlike SPI_READY). Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net> Cc: "Paulraj, Sandeep" <s-paulraj@ti.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 20 6月, 2009 8 次提交
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由 Anton Vorontsov 提交于
Since we renamed the file, we might want to rename the file internals too. Though we don't bother with changing platform driver name and platform module alias. The stuff is legacy and hopefully we'll remove it soon. Suggested-by: NKumar Gala <galak@kernel.crashing.org> Signed-off-by: NAnton Vorontsov <avorontsov@ru.mvista.com> Cc: David Brownell <david-b@pacbell.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Anton Vorontsov 提交于
The driver handles MPC83xx, MPC85xx and MPC86xx SPI controllers, so rename the file for clarity. Suggested-by: NKumar Gala <galak@kernel.crashing.org> Signed-off-by: NAnton Vorontsov <avorontsov@ru.mvista.com> Cc: Kumar Gala <galak@gate.crashing.org> Cc: David Brownell <david-b@pacbell.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Anton Vorontsov 提交于
This patch removes #if 0'ed code, and spi_mpc83xx->busy variable that is used by that dead snippet only. Signed-off-by: NAnton Vorontsov <avorontsov@ru.mvista.com> Cc: Kumar Gala <galak@gate.crashing.org> Cc: David Brownell <david-b@pacbell.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Anton Vorontsov 提交于
mpc83xx_spi_work() is quite large, with up to five indentation levels and is quite difficult to read. So, split the function in two parts: 1. mpc83xx_spi_work() now only traverse queued spi messages; 2. mpc83xx_spi_do_one_msg() only manages single messages. There should be no functional changes. Signed-off-by: NAnton Vorontsov <avorontsov@ru.mvista.com> Cc: Kumar Gala <galak@gate.crashing.org> Cc: David Brownell <david-b@pacbell.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Anton Vorontsov 提交于
Checkpatch is spitting errors when seeing the rename patch, so fix the errors prior to moving. Following errors and warnings were fixed: WARNING: Use #include <linux/io.h> instead of <asm/io.h> #1027: FILE: drivers/spi/spi_mpc8xxx.c:37: +#include <asm/io.h> ERROR: "foo * bar" should be "foo *bar" #1111: FILE: drivers/spi/spi_mpc8xxx.c:121: +static inline void mpc83xx_spi_write_reg(__be32 __iomem * reg, u32 val) ERROR: "foo * bar" should be "foo *bar" #1116: FILE: drivers/spi/spi_mpc8xxx.c:126: +static inline u32 mpc83xx_spi_read_reg(__be32 __iomem * reg) ERROR: "foo * bar" should be "foo *bar" #1125: FILE: drivers/spi/spi_mpc8xxx.c:135: + type * rx = mpc83xx_spi->rx; \ ERROR: "foo * bar" should be "foo *bar" #1135: FILE: drivers/spi/spi_mpc8xxx.c:145: + const type * tx = mpc83xx_spi->tx; \ WARNING: suspect code indent for conditional statements (16, 25) #1504: FILE: drivers/spi/spi_mpc8xxx.c:514: + while (((event = [...] + cpu_relax(); Following warnings were left over, since fixing them will hurt the readability. We'd better fix them by lowering the indentation level by splitting mpc83xx_spi_work function into two parts. WARNING: line over 80 characters #1371: FILE: drivers/spi/spi_mpc8xxx.c:381: + status = mpc83xx_spi_setup_transfer(spi, t); WARNING: line over 80 characters #1392: FILE: drivers/spi/spi_mpc8xxx.c:402: + mpc83xx_spi_chipselect(spi, BITBANG_CS_INACTIVE); Signed-off-by: NAnton Vorontsov <avorontsov@ru.mvista.com> Cc: Kumar Gala <galak@gate.crashing.org> Cc: David Brownell <david-b@pacbell.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Anton Vorontsov 提交于
This is needed for some underlaying GPIO controllers that may be a bit slow, or if chip-select signal need some time to stabilize. For what it's worth, we already have the similar delay for chip-select de-assertion case. Signed-off-by: NAnton Vorontsov <avorontsov@ru.mvista.com> Cc: Kumar Gala <galak@gate.crashing.org> Cc: David Brownell <david-b@pacbell.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Anton Vorontsov 提交于
When a platform is running at high frequencies it's not always possible to scale-down a frequency to a requested value, and using mmc_spi driver this leads to the following printk flood during card polling: ... mmc_spi spi32766.0: Requested speed is too low: 400000 Hz. Will use 520828 Hz instead. mmc_spi spi32766.0: Requested speed is too low: 400000 Hz. Will use 520828 Hz instead. ... Fix this by using WARN_ONCE(), it's better than the flood, and also better than turning dev_err() into dev_dbg(), since we actually want to warn that some things may not work correctly. Signed-off-by: NAnton Vorontsov <avorontsov@ru.mvista.com> Cc: Kumar Gala <galak@gate.crashing.org> Cc: David Brownell <david-b@pacbell.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Anton Vorontsov 提交于
With this patch we'll able to select spi_mpc83xx driver on the MPC86xx platforms. Let the driver depend on FSL_SOC, so we don't have to worry about Kconfig anymore. Also remove the "experimental" dependency, the driver has been tested to work on a various hardware, and surely not experimental anymore. Signed-off-by: NAnton Vorontsov <avorontsov@ru.mvista.com> Cc: Kumar Gala <galak@gate.crashing.org> Cc: David Brownell <david-b@pacbell.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 19 6月, 2009 6 次提交
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由 Jiri Pirko 提交于
Buffer needs not be dma-safe, not rx data length. Signed-off-by: NJiri Pirko <jpirko@redhat.com> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Daniel Ribeiro 提交于
Commit a7bb3909 ("spi: pxa2xx_spi: introduce chipselect GPIO to simplify the common cases") introduces chipselect GPIO, and configures the CS polarity using SPI_CS_HIGH spi->mode flag. Add SPI_CS_HIGH to the allowed modes. Signed-off-by: NDaniel Ribeiro <drwyrm@gmail.com> Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Anton Vorontsov 提交于
mpc52xx_psc_spi driver is the last user of the legacy activate_cs and deactivate_cs callbacks, so convert the driver to the cs_control hook and remove the legacy callbacks from fsl_spi_platform_data struct. Signed-off-by: NAnton Vorontsov <avorontsov@ru.mvista.com> Cc: Grant Likely <grant.likely@secretlab.ca> Cc: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 David Brownell 提交于
Move some common spi_setup() error checks into the SPI framework from the spi_master controller drivers: - Add a new "mode_bits" field to spi_master - Use that in spi_setup to validate the spi->mode value being requested. Setting this new field is now mandatory for any controller supporting more than vanilla SPI_MODE_0. - Update all spi_master drivers to: * Initialize that field * Remove current spi_setup() checks using that value. This is a net minor code shrink. Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 David Brownell 提交于
Start moving some spi_setup() functionality into the SPI core from the various spi_master controller drivers: - Make that function stop being an inline; - Move two common idioms from drivers into that new function: * Default bits_per_word to 8 if that field isn't set * Issue a standardized dev_dbg() message This is a net minor source code shrink, and supports enhancments found in some follow-up patches. Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Roel Kluin 提交于
bfin_spi_flush() returns limit, which reaches -1 upon timeout. but in function bfin_spi_pump_transfers() it is compared with 0. Signed-off-by: NRoel Kluin <roel.kluin@gmail.com> Acked-by: NDavid Brownell <dbrownell@users.sourceforge.net> Cc: Bryan Wu <cooloney@kernel.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 17 6月, 2009 2 次提交
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由 Anton Vorontsov 提交于
mpc52xx_psc_spi driver is the last user of the legacy activate_cs and deactivate_cs callbacks, so convert the driver to the cs_control hook and remove the legacy callbacks from fsl_spi_platform_data struct. Signed-off-by: NAnton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
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由 Roel Kluin 提交于
Do not take the size of a pointer to determine the size of the pointed-to type. Signed-off-by: NRoel Kluin <roel.kluin@gmail.com> Acked-by: NAnton Vorontsov <avorontsov@ru.mvista.com> Cc: David Brownell <david-b@pacbell.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Kumar Gala <galak@gate.crashing.org> Acked-by: NGrant Likely <grant.likely@secretlab.ca> Cc: <stable@kernel.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 13 6月, 2009 1 次提交
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由 Jie Zhang 提交于
The latter naming convention is much more common. Signed-off-by: NJie Zhang <jie.zhang@analog.com> Signed-off-by: NMike Frysinger <vapier@gentoo.org>
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- 11 6月, 2009 1 次提交
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由 Linus Walleij 提交于
This adds a driver for the ARM PL022 PrimeCell SSP/SPI driver found in the U300 platforms as well as in some ARM reference hardware, and in a modified version on the Nomadik board. Reviewed-by: NAlessandro Rubini <rubini-list@gnudd.com> Reviewed-by: NRussell King <linux@arm.linux.org.uk> Reviewed-by: NBaruch Siach <baruch@tkos.co.il> Signed-off-by: NLinus Walleij <linus.walleij@stericsson.com> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 21 5月, 2009 1 次提交
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由 Michal Simek 提交于
Signed-off-by: NMichal Simek <monstr@monstr.eu>
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- 18 5月, 2009 1 次提交
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由 Ben Dooks 提交于
Move all the gpio functions out of <mach/hardware.h> as this file is for defining the generic IO base addresses for the kernel IO calls. Make a new header <mach/gpio-fns.h> to take this and include it via the chain from <linux/gpio.h> which is what most of these files should be using (and will be changed as soon as possible). Note, this does make minor changes to some drivers but should not mess up any pending merges. CC: Richard Purdie <rpurdie@rpsys.net> Acked-by: NMark Brown <broonie@opensource.wolfsonmicro.com> CC: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: NBen Dooks <ben-linux@fluff.org>
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- 13 5月, 2009 1 次提交
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由 Daniel Ribeiro 提交于
setup() may fail before ctldata is set, causing a kernel panic on cleanup(). Signed-off-by: NDaniel Ribeiro <drwyrm@gmail.com> Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net> Cc: Eric Miao <eric.y.miao@gmail.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 07 5月, 2009 1 次提交
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由 Sascha Hauer 提交于
arch-imx is superseeded by the MXC architecture support. This patch removes arch-imx from the build system. Signed-off-by: NSascha Hauer <s.hauer@pengutronix.de>
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- 22 4月, 2009 2 次提交
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由 Roel Kluin 提交于
On line 944 the return value of flush() is considered as a boolean, but limit reaches -1 upon timeout which evaluates to true. On 540, 594, 720 the same occurs for wait_ssp_rx_stall() On 536 the same occurs for wait_dma_channel_stop() Signed-off-by: NRoel Kluin <roel.kluin@gmail.com> Acked-by: NEric Miao <eric.miao@marvell.com> Cc: David Brownell <david-b@pacbell.net> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Daniel Ribeiro 提交于
If DMA is enabled, any spi_sync call after suspend/resume would block forever, because DRCMR is lost on suspend. This patch restores DRCMR to the same values set by probe. Signed-off-by: NDaniel Ribeiro <drwyrm@gmail.com> Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 14 4月, 2009 1 次提交
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由 David Brownell 提交于
The "simplify spi_write_then_read()" patch included two regressions from the 2.6.27 behaviors: - The data it wrote out during the (full duplex) read side of the transfer was not zeroed. - It fails completely on half duplex hardware, such as Microwire and most "3-wire" SPI variants. So, revert that patch. A revised version should be submitted at some point, which can get the speedup on standard hardware (full duplex) without breaking on less-capable half-duplex stuff. Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net> Cc: <stable@kernel.org> [2.6.28.x, 2.6.29.x] Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 13 4月, 2009 1 次提交
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由 Daniel Ribeiro 提交于
Signed-off-by: NDaniel Ribeiro <drwyrm@gmail.com> Signed-off-by: NEric Miao <eric.miao@marvell.com>
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- 07 4月, 2009 1 次提交
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由 Mike Rapoport 提交于
Signed-off-by: NMike Rapoport <mike@compulab.co.il> Cc: Bryan Wu <bryan.wu@analog.com> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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