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path: root/drivers/spi/spi-pl022.c
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* spi: delete repeated words in commentsJay Fang2021-05-101-2/+2
| | | | | | | | | | | | | | | | | | | | | Drop repeated words in spi-bcm2835aux.c {are} Drop repeated words in spi-dw-mmio.c {the} Drop repeated words in spi-geni-qcom.c {our} Drop repeated words in spi-pl022.c {on} Drop repeated words in spi-ppc4xx.c {the} Signed-off-by: Jay Fang <f.fangjian@huawei.com> Link: https://lore.kernel.org/r/1620629903-15493-4-git-send-email-f.fangjian@huawei.com Signed-off-by: Mark Brown <broonie@kernel.org>
* spi: pl022: Convert to use GPIO descriptorsLinus Walleij2021-03-311-6/+14
| | | | | | | | | | | This converts the PL022 driver to use GPIO descriptors instead of the old global GPIO numberspace. Since the driver handles messages on its own it needs to manage the GPIO descriptor directly. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Link: https://lore.kernel.org/r/20210330164907.2346010-3-linus.walleij@linaro.org Signed-off-by: Mark Brown <broonie@kernel.org>
* spi: pl022: Use GPIOs looked up by the coreLinus Walleij2021-03-311-60/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | The SPI core looks up GPIO lines from the device tree, so let's stop trying to do that on our own and rely on the core to do this for us. In addition to the GPIO line we also need to keep track of the chip select index separately, as the native chip select needs this index. The driver was reusing the same GPIO array for native chip select indices, so keep this in a separate state variable instead. The facility to pass in custom GPIO lines from the platform data can go, because even if we do have out-of-tree code that want to use platform data, they can soon pass in GPIOs using machine GPIO descriptor tables which will be available after the next step when we convert the driver to using GPIO descriptors. The implicit inclusion of <linux/of.h> is made explicit as we no longer need to include <linux/of_gpio.h>. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Link: https://lore.kernel.org/r/20210330164907.2346010-2-linus.walleij@linaro.org Signed-off-by: Mark Brown <broonie@kernel.org>
* spi: pl022: Drop custom per-chip cs_controlLinus Walleij2021-03-311-24/+2
| | | | | | | | | | | Drop the custom cs_control() assigned through platform data, we have no in-tree users and the only out-of-tree use I have ever seen of this facility is to pull GPIO lines, which is something the driver can already do for us. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Link: https://lore.kernel.org/r/20210330164907.2346010-1-linus.walleij@linaro.org Signed-off-by: Mark Brown <broonie@kernel.org>
* spi: pl022: User more sensible defaultsLinus Walleij2021-03-291-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When using the device tree, which must be considered normal these days, in order to get some kind of normal functionality out of the PL022 users have to actively go into the device tree and edit the SPI clients like this: spi { compatible = "arm,pl022"; num-cs = <1>; cs-gpios = <&gpio 0 GPIO_ACTIVE_LOW>; foo@0 { compatible = "foo"; reg = <0>; pl022,interface = <0>; pl022,com-mode = <0>; }; }; Otherwise the PL022 will come up as a client (slave) and using polling mode. This is quite unintuitive and many users will get their device trees wrong. Alter the defaults such that we come up in host mode (master) and use interrupt mode. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Link: https://lore.kernel.org/r/20210328121530.1983081-1-linus.walleij@linaro.org Signed-off-by: Mark Brown <broonie@kernel.org>
* spi: pl022: Fix trailing whitespaceJay Fang2021-03-241-1/+1
| | | | | | | | | | | Fix checkpatch error: ERROR: trailing whitespace #1198: FILE: spi-pl022.c:1198: Signed-off-by: Jay Fang <f.fangjian@huawei.com> Link: https://lore.kernel.org/r/1616566602-13894-12-git-send-email-f.fangjian@huawei.com Signed-off-by: Mark Brown <broonie@kernel.org>
* amba: Make the remove callback return voidUwe Kleine-König2021-02-021-3/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | All amba drivers return 0 in their remove callback. Together with the driver core ignoring the return value anyhow, it doesn't make sense to return a value here. Change the remove prototype to return void, which makes it explicit that returning an error value doesn't work as expected. This simplifies changing the core remove callback to return void, too. Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Acked-by: Krzysztof Kozlowski <krzk@kernel.org> # for drivers/memory Acked-by: Mark Brown <broonie@kernel.org> Acked-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Suzuki K Poulose <suzuki.poulose@arm.com> # for hwtracing/coresight Acked-By: Vinod Koul <vkoul@kernel.org> # for dmaengine Acked-by: Guenter Roeck <linux@roeck-us.net> # for watchdog Acked-by: Wolfram Sang <wsa@kernel.org> # for I2C Acked-by: Takashi Iwai <tiwai@suse.de> # for sound Acked-by: Vladimir Zapolskiy <vz@mleia.com> # for memory/pl172 Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Link: https://lore.kernel.org/r/20210126165835.687514-5-u.kleine-koenig@pengutronix.de Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
* spi: spi-pl022: Provide missing struct attribute/function param docsLee Jones2020-07-171-3/+9
| | | | | | | | | | | | | | | | | | | | | | | Also demote non-worthy kerneldoc headers to standard comment blocks. Fixes the following W=1 kernel build warning(s): drivers/spi/spi-pl022.c:304: warning: cannot understand function prototype: 'enum ssp_writing ' drivers/spi/spi-pl022.c:330: warning: Function parameter or member 'loopback' not described in 'vendor_data' drivers/spi/spi-pl022.c:398: warning: Function parameter or member 'rx_lev_trig' not described in 'pl022' drivers/spi/spi-pl022.c:398: warning: Function parameter or member 'tx_lev_trig' not described in 'pl022' drivers/spi/spi-pl022.c:398: warning: Function parameter or member 'dma_running' not described in 'pl022' drivers/spi/spi-pl022.c:670: warning: Function parameter or member 'pl022' not described in 'readwriter' drivers/spi/spi-pl022.c:1250: warning: Function parameter or member 'irq' not described in 'pl022_interrupt_handler' drivers/spi/spi-pl022.c:1250: warning: Function parameter or member 'dev_id' not described in 'pl022_interrupt_handler' drivers/spi/spi-pl022.c:1343: warning: Function parameter or member 'pl022' not described in 'set_up_next_transfer' drivers/spi/spi-pl022.c:1343: warning: Function parameter or member 'transfer' not described in 'set_up_next_transfer' Signed-off-by: Lee Jones <lee.jones@linaro.org> Acked-by: Linus Walleij <linus.walleij@linaro.org> Cc: Sachin Verma <sachin.verma@st.com> Link: https://lore.kernel.org/r/20200717135424.2442271-9-lee.jones@linaro.org Signed-off-by: Mark Brown <broonie@kernel.org>
* spi: pl022: Use dma_request_chan() directly for channel requestPeter Ujfalusi2019-11-151-2/+2
| | | | | | | | | | | dma_request_slave_channel_reason() is: #define dma_request_slave_channel_reason(dev, name) \ dma_request_chan(dev, name) Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Link: https://lore.kernel.org/r/20191113094256.1108-6-peter.ujfalusi@ti.com Signed-off-by: Mark Brown <broonie@kernel.org>
* spi: use new `spi_transfer_delay_exec` helper where straightforwardAlexandru Ardelean2019-10-151-14/+11
| | | | | | | | | | | | | | | | | | | For many places in the spi drivers, using the new `spi_transfer_delay` helper is straightforward. It's just replacing: ``` if (t->delay_usecs) udelay(t->delay_usecs); ``` with `spi_transfer_delay(t)` which handles both `delay_usecs` and the new `delay` field. This change replaces in all places (in the spi drivers) where this change is simple. Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com> Link: https://lore.kernel.org/r/20190926105147.7839-10-alexandru.ardelean@analog.com Signed-off-by: Mark Brown <broonie@kernel.org>
* treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157Thomas Gleixner2019-05-301-10/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Based on 3 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version [author] [kishon] [vijay] [abraham] [i] [kishon]@[ti] [com] this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version [author] [graeme] [gregory] [gg]@[slimlogic] [co] [uk] [author] [kishon] [vijay] [abraham] [i] [kishon]@[ti] [com] [based] [on] [twl6030]_[usb] [c] [author] [hema] [hk] [hemahk]@[ti] [com] this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1105 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.202006027@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* spi: pl022: add a message state STATE_TIMEOUT for timeout transferJiwei Sun2019-01-281-1/+29
| | | | | | | | | | When transfer timeout, give -EAGAIN to the message's status, and it can make the spi device driver choose repeated transimation or not. And if transfer timeout, output some useful information for tracing the issue. Signed-off-by: Jiwei Sun <jiwei.sun@windriver.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Mark Brown <broonie@kernel.org>
* spi: pl022: Handle cs_change for last transferFredrik Ternerot2018-11-131-7/+7
| | | | | | | | | Do not deselect cs when cs_change is set for the last transfer in the message. In this case, cs_change indicates that cs should stay selected until the next transfer. Signed-off-by: Fredrik Ternerot <fredrikt@axis.com> Signed-off-by: Mark Brown <broonie@kernel.org>
* spi: pl022: Remove set but not used variable 'chip'YueHaibing2018-09-071-2/+0
| | | | | | | | | | | Fixes gcc '-Wunused-but-set-variable' warning: drivers/spi/spi-pl022.c: In function 'do_polling_transfer': drivers/spi/spi-pl022.c:1493:20: warning: variable 'chip' set but not used [-Wunused-but-set-variable] Signed-off-by: YueHaibing <yuehaibing@huawei.com> Signed-off-by: Mark Brown <broonie@kernel.org>
* spi: Do not print a message if spi_controller_{suspend,resume}() failsGeert Uytterhoeven2018-09-051-6/+2
| | | | | | | | | | | | | | spi_controller_{suspend,resume}() already prints an error message on failure, so there is no need to repeat this in individual drivers. Note: spi_master_{suspend,resume}() is an alias for spi_controller_{suspend,resume}(). Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Reviewed-by: Daniel Mack <daniel@zonque.org> Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com> Signed-off-by: Mark Brown <broonie@kernel.org>
* treewide: devm_kzalloc() -> devm_kcalloc()Kees Cook2018-06-121-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The devm_kzalloc() function has a 2-factor argument form, devm_kcalloc(). This patch replaces cases of: devm_kzalloc(handle, a * b, gfp) with: devm_kcalloc(handle, a * b, gfp) as well as handling cases of: devm_kzalloc(handle, a * b * c, gfp) with: devm_kzalloc(handle, array3_size(a, b, c), gfp) as it's slightly less ugly than: devm_kcalloc(handle, array_size(a, b), c, gfp) This does, however, attempt to ignore constant size factors like: devm_kzalloc(handle, 4 * 1024, gfp) though any constants defined via macros get caught up in the conversion. Any factors with a sizeof() of "unsigned char", "char", and "u8" were dropped, since they're redundant. Some manual whitespace fixes were needed in this patch, as Coccinelle really liked to write "=devm_kcalloc..." instead of "= devm_kcalloc...". The Coccinelle script used for this was: // Fix redundant parens around sizeof(). @@ expression HANDLE; type TYPE; expression THING, E; @@ ( devm_kzalloc(HANDLE, - (sizeof(TYPE)) * E + sizeof(TYPE) * E , ...) | devm_kzalloc(HANDLE, - (sizeof(THING)) * E + sizeof(THING) * E , ...) ) // Drop single-byte sizes and redundant parens. @@ expression HANDLE; expression COUNT; typedef u8; typedef __u8; @@ ( devm_kzalloc(HANDLE, - sizeof(u8) * (COUNT) + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(__u8) * (COUNT) + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(char) * (COUNT) + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(unsigned char) * (COUNT) + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(u8) * COUNT + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(__u8) * COUNT + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(char) * COUNT + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(unsigned char) * COUNT + COUNT , ...) ) // 2-factor product with sizeof(type/expression) and identifier or constant. @@ expression HANDLE; type TYPE; expression THING; identifier COUNT_ID; constant COUNT_CONST; @@ ( - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * (COUNT_ID) + COUNT_ID, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * COUNT_ID + COUNT_ID, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * (COUNT_CONST) + COUNT_CONST, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * COUNT_CONST + COUNT_CONST, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * (COUNT_ID) + COUNT_ID, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * COUNT_ID + COUNT_ID, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * (COUNT_CONST) + COUNT_CONST, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * COUNT_CONST + COUNT_CONST, sizeof(THING) , ...) ) // 2-factor product, only identifiers. @@ expression HANDLE; identifier SIZE, COUNT; @@ - devm_kzalloc + devm_kcalloc (HANDLE, - SIZE * COUNT + COUNT, SIZE , ...) // 3-factor product with 1 sizeof(type) or sizeof(expression), with // redundant parens removed. @@ expression HANDLE; expression THING; identifier STRIDE, COUNT; type TYPE; @@ ( devm_kzalloc(HANDLE, - sizeof(TYPE) * (COUNT) * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE) * (COUNT) * STRIDE + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE) * COUNT * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE) * COUNT * STRIDE + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING) * (COUNT) * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING) * (COUNT) * STRIDE + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING) * COUNT * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING) * COUNT * STRIDE + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) ) // 3-factor product with 2 sizeof(variable), with redundant parens removed. @@ expression HANDLE; expression THING1, THING2; identifier COUNT; type TYPE1, TYPE2; @@ ( devm_kzalloc(HANDLE, - sizeof(TYPE1) * sizeof(TYPE2) * COUNT + array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING1) * sizeof(THING2) * COUNT + array3_size(COUNT, sizeof(THING1), sizeof(THING2)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(THING1), sizeof(THING2)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE1) * sizeof(THING2) * COUNT + array3_size(COUNT, sizeof(TYPE1), sizeof(THING2)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(TYPE1), sizeof(THING2)) , ...) ) // 3-factor product, only identifiers, with redundant parens removed. @@ expression HANDLE; identifier STRIDE, SIZE, COUNT; @@ ( devm_kzalloc(HANDLE, - (COUNT) * STRIDE * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - COUNT * (STRIDE) * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - COUNT * STRIDE * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - (COUNT) * (STRIDE) * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - COUNT * (STRIDE) * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - (COUNT) * STRIDE * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - (COUNT) * (STRIDE) * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - COUNT * STRIDE * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) ) // Any remaining multi-factor products, first at least 3-factor products, // when they're not all constants... @@ expression HANDLE; expression E1, E2, E3; constant C1, C2, C3; @@ ( devm_kzalloc(HANDLE, C1 * C2 * C3, ...) | devm_kzalloc(HANDLE, - (E1) * E2 * E3 + array3_size(E1, E2, E3) , ...) | devm_kzalloc(HANDLE, - (E1) * (E2) * E3 + array3_size(E1, E2, E3) , ...) | devm_kzalloc(HANDLE, - (E1) * (E2) * (E3) + array3_size(E1, E2, E3) , ...) | devm_kzalloc(HANDLE, - E1 * E2 * E3 + array3_size(E1, E2, E3) , ...) ) // And then all remaining 2 factors products when they're not all constants, // keeping sizeof() as the second factor argument. @@ expression HANDLE; expression THING, E1, E2; type TYPE; constant C1, C2, C3; @@ ( devm_kzalloc(HANDLE, sizeof(THING) * C2, ...) | devm_kzalloc(HANDLE, sizeof(TYPE) * C2, ...) | devm_kzalloc(HANDLE, C1 * C2 * C3, ...) | devm_kzalloc(HANDLE, C1 * C2, ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * (E2) + E2, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * E2 + E2, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * (E2) + E2, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * E2 + E2, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - (E1) * E2 + E1, E2 , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - (E1) * (E2) + E1, E2 , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - E1 * E2 + E1, E2 , ...) ) Signed-off-by: Kees Cook <keescook@chromium.org>
* spi: pl022: constify amba_idArvind Yadav2017-08-231-1/+1
| | | | | | | | amba_id are not supposed to change at runtime. All functions working with const amba_id. So mark the non-const structs as const. Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
* spi: pl022: don't use uninitialized variableRabin Vincent2017-04-061-1/+1
| | | | | | | | | | The num-cs property is a required property according to the binding documentation. However, if it is not present, the driver currently simply uses random junk from the stack for the num-cs since the variable whose pointer is passed to of_property_read_u32() is not initialized. Signed-off-by: Rabin Vincent <rabinv@axis.com> Signed-off-by: Mark Brown <broonie@kernel.org>
* spi: pl022: Remove obsolete struct pl022 members from kerneldocJarkko Nikula2016-02-171-7/+0
| | | | | | | | These structure members were removed in 2012 by the commit ffbbdd21329f ("spi: create a message queueing infrastructure"). Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
* spi: pl022: handle EPROBE_DEFER for dmaRabin Vincent2015-11-231-6/+22
| | | | | | | | | Handle EPROBE_DEFER explicitly so that we ensure that we get the DMA channel specified in the device tree, instead of depending on the DMA controller getting probed before us. Signed-off-by: Rabin Vincent <rabin.vincent@axis.com> Signed-off-by: Mark Brown <broonie@kernel.org>
*-. Merge remote-tracking branches 'spi/topic/omap-100k', ↵Mark Brown2015-04-111-7/+7
|\ \ | | | | | | | | | 'spi/topic/omap-uwire', 'spi/topic/pl022', 'spi/topic/pm' and 'spi/topic/pxa2xx' into spi-next
| | * spi: pl022: Remove dead codeAlexander Sverdlin2015-03-061-3/+1
| | | | | | | | | | | | | | | | | | | | | "flag" variable does nothing, remove it. Signed-off-by: Alexander Sverdlin <alexander.sverdlin@nokia.com> Signed-off-by: Mark Brown <broonie@kernel.org>
| | * spi: pl022: Don't touch unspecified bits in interrupt maskAlexander Sverdlin2015-03-061-1/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | PL022 Programmers model explicitely states "do not modify undefined register bits". Correct the "all enable" interrupt mask so that it only enables defined ones. Signed-off-by: Alexander Sverdlin <alexander.sverdlin@nokia.com> Signed-off-by: Mark Brown <broonie@kernel.org>
| | * spi: pl022: Remove incorrect TxFIFO full reportingAlexander Sverdlin2015-03-061-3/+0
| |/ | | | | | | | | | | | | | | | | | | According to PL022 specification, TNF bit states for "Transmit FIFO Not full". So the logic here is inverted. But "Receive Overrun Interrupt", which is handled here, is only triggered on Rx errors. So instead of fixing the if statement, remove the whole message. Signed-off-by: Alexander Sverdlin <alexander.sverdlin@nokia.com> Signed-off-by: Mark Brown <broonie@kernel.org>
* / spi: pl022: Fix race in giveback() leading to driver lock-upAlexander Sverdlin2015-03-061-1/+1
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit fd316941c ("spi/pl022: disable port when unused") introduced a race, which leads to possible driver lock up (easily reproducible on SMP). The problem happens in giveback() function where the completion of the transfer is signalled to SPI subsystem and then the HW SPI controller is disabled. Another transfer might be setup in between, which brings driver in locked-up state. Exact event sequence on SMP: core0 core1 => pump_transfers() /* message->state == STATE_DONE */ => giveback() => spi_finalize_current_message() => pl022_unprepare_transfer_hardware() => pl022_transfer_one_message => flush() => do_interrupt_dma_transfer() => set_up_next_transfer() /* Enable SSP, turn on interrupts */ writew((readw(SSP_CR1(pl022->virtbase)) | SSP_CR1_MASK_SSE), SSP_CR1(pl022->virtbase)); ... => pl022_interrupt_handler() => readwriter() /* disable the SPI/SSP operation */ => writew((readw(SSP_CR1(pl022->virtbase)) & (~SSP_CR1_MASK_SSE)), SSP_CR1(pl022->virtbase)); Lockup! SPI controller is disabled and the data will never be received. Whole SPI subsystem is waiting for transfer ACK and blocked. So, only signal transfer completion after disabling the controller. Fixes: fd316941c (spi/pl022: disable port when unused) Signed-off-by: Alexander Sverdlin <alexander.sverdlin@nokia.com> Signed-off-by: Mark Brown <broonie@kernel.org> Cc: stable@vger.kernel.org
* PM: Merge the SET*_RUNTIME_PM_OPS() macrosRafael J. Wysocki2014-12-041-1/+1
| | | | | | | | | | | | | | | | | | | | The SET_PM_RUNTIME_PM_OPS() and SET_RUNTIME_PM_OPS() macros are identical except that one of them is not empty for CONFIG_PM set, while the other one is not empty for CONFIG_PM_RUNTIME set, respectively. However, after commit b2b49ccbdd54 (PM: Kconfig: Set PM_RUNTIME if PM_SLEEP is selected) PM_RUNTIME is always set if PM is set, so one of these macros is now redundant. For this reason, replace SET_PM_RUNTIME_PM_OPS() with SET_RUNTIME_PM_OPS() everywhere and redefine the SET_PM_RUNTIME_PM_OPS symbol as SET_RUNTIME_PM_OPS in case new code is starting to use the macro being removed here. Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Acked-by: Kevin Hilman <khilman@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
* spi: pl022: Fix incorrect dma_unmap_sgRay Jui2014-10-131-1/+1
| | | | | | | | | | When mapped RX DMA entries are unmapped in an error condition when DMA is firstly configured in the driver, the number of TX DMA entries was passed in, which is incorrect Signed-off-by: Ray Jui <rjui@broadcom.com> Signed-off-by: Mark Brown <broonie@kernel.org> Cc: stable@vger.kernel.org
*-. Merge remote-tracking branches 'spi/topic/pl022', 'spi/topic/pxa2xx', ↵Mark Brown2014-10-031-1/+63
|\ \ | | | | | | | | | 'spi/topic/rspi', 'spi/topic/sh-msiof' and 'spi/topic/sirf' into spi-next
| * | spi: pl022: Add support for chip select extensionAnders Berg2014-09-241-1/+58
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add support for a extended PL022 which has an extra register for controlling up to five chip select signals. This controller is found on the AXM5516 SoC. Unfortunately the PrimeCell identification registers are identical to a standard ARM PL022. To work around this, the peripheral ID must be overridden in the device tree using the "arm,primecell-periphid" property with the value 0x000b6022. Signed-off-by: Anders Berg <anders.berg@avagotech.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Mark Brown <broonie@kernel.org>
| * | spi: pl022: Add missing error check for devm_kzallocKiran Padwal2014-09-181-0/+5
| |/ | | | | | | | | | | | | | | | | | | Currently this driver is missing a check on the return value of devm_kzalloc, which would cause a NULL pointer dereference in a OOM situation. This patch adds a missing check. Signed-off-by: Kiran Padwal <kiran.padwal@smartplayin.com> Signed-off-by: Mark Brown <broonie@kernel.org>
* / spi/pl022: Fix error messageRoland Stigge2014-09-091-1/+1
|/ | | | | | | This patch fixes an error message typo ("not" missing). Signed-off-by: Roland Stigge <stigge@antcom.de> Signed-off-by: Mark Brown <broonie@linaro.org>
* spi/pl022: Explicitly truncate large bitmaskMark Brown2014-08-011-1/+1
| | | | | | | | | When building on 64 bit architectures the use of bitwise negation generates constants larger than 32 bits which won't fit in u32s used to represent 32 bit register values on the device. Explicitly cast to let the compiler know that the higher bits are not significant and can be discarded. Signed-off-by: Mark Brown <broonie@linaro.org>
* spi: pl022: remove unnecessary OOM messagesJingoo Han2014-04-291-10/+3
| | | | | | | | The site-specific OOM messages are unnecessary, because they duplicate the MM subsystem generic OOM message. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Mark Brown <broonie@linaro.org>
*-. Merge remote-tracking branches 'spi/topic/omap-uwire', 'spi/topic/omap100k', ↵Mark Brown2014-03-301-52/+23
|\ \ | | | | | | | | | 'spi/topic/omap2', 'spi/topic/orion', 'spi/topic/pl022', 'spi/topic/qup', 'spi/topic/rspi' and 'spi/topic/s3c24xx' into spi-next
| | * spi: pl022: Don't ignore power domain and amba bus at system suspendUlf Hansson2014-03-061-36/+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>
| | * spi: pl022: Let runtime PM callbacks be available for CONFIG_PMUlf Hansson2014-03-061-3/+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>
| | * spi: pl022: Remove redundant pinctrl to default state in probeUlf Hansson2014-02-041-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | The driver core is now taking care of putting our pins into default state at probe. Thus we can remove the redundant call for it in probe. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Mark Brown <broonie@linaro.org>
| | * spi: pl022: Simplify clock handlingUlf Hansson2014-02-041-12/+3
| | | | | | | | | | | | | | | | | | | | | | | | Make use of clk_prepare_enable and clk_disable_unprepare to simplify code. No functional change. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Mark Brown <broonie@linaro.org>
| | * spi/pl022: Unprepare clocks while suspendedMark Brown2014-02-031-2/+2
| |/ | | | | | | | | | | | | | | | | | | When the driver was converted to clk_prepare() the suspend path didn't have any changes made so the clock remains prepared throughout the runtime of the driver. Unprepare it when suspended so that any savings that can be made as a result are made. Signed-off-by: Mark Brown <broonie@linaro.org> Acked-by: Linus Walleij <linus.walleij@linaro.org>
* / spi: Use list_last_entry at appropriate placesAxel Lin2014-02-231-3/+2
|/ | | | | Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@linaro.org>
* Merge remote-tracking branch 'spi/topic/pl022' into spi-nextMark Brown2013-10-251-2/+2
|\
| * spi: pl022: Use dev_info() instead of printk()Jingoo Han2013-10-141-2/+2
| | | | | | | | | | | | | | | | | | Change raw printk() call to dev_info() to provide a better message to userspace so it can properly identify the device. 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>
* | spi: pl022: use devm_spi_register_master()Jingoo Han2013-09-261-2/+1
|/ | | | | | | | 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>
* spi: pl022: remove unnecessary amba_set_drvdata()Jingoo Han2013-09-171-1/+0
| | | | | | | | | The driver core clears the driver data to NULL after device_release or on probe failure. Thus, it is not needed to manually clear the device driver data to NULL. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Mark Brown <broonie@linaro.org>
* spi: pl022: Remove redundant breakSachin Kamat2013-09-171-2/+0
| | | | | | | | 'break' immediately after return has no effect. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Mark Brown <broonie@linaro.org>
* Merge remote-tracking branch 'spi/topic/qspi' into spi-nextMark Brown2013-09-011-20/+1
|\
| * spi/pl022: Convert to core runtime PMMark Brown2013-07-291-20/+1
| | | | | | | | | | Signed-off-by: Mark Brown <broonie@linaro.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
* | Merge remote-tracking branch 'spi/topic/pl022' into spi-nextMark Brown2013-09-011-2/+2
|\ \
| * | spi: spi-pl022: Fix warning when CONFIG_ARM_LPAE=yFabio Estevam2013-08-221-2/+2
| |/ | | | | | | | | | | | | | | | | | | | | | | | | When CONFIG_ARM_LPAE=y the following build warning is generated: drivers/spi/spi-pl022.c:2178:9: warning: format '%x' expects argument of type 'unsigned int', but argument 2 has type 'resource_size_t' [-Wformat] According to Documentation/printk-formats.txt '%pa' can be used to properly print 'resource_size_t'. Reported-by: Kevin Hilman <khilman@linaro.org> Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> Signed-off-by: Mark Brown <broonie@linaro.org>
* / spi: use dev_get_platdata()Jingoo Han2013-08-291-1/+2
|/ | | | | | | | Use the wrapper function for retrieving the platform data instead of accessing dev->platform_data directly. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Mark Brown <broonie@linaro.org>
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-17 16:07:04 +0000