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2020-03-26Merge tag 'v5.6-rc7' into i2c/for-5.7Wolfram Sang1-1/+2
Linux 5.6-rc7
2020-03-12misc: eeprom: at24: fix regulator underflowMichael Auchter1-1/+2
The at24 driver attempts to read a byte from the device to validate that it's actually present, and if not, disables the vcc regulator and returns -ENODEV. However, between the read and the error handling path, pm_runtime_idle() is called and invokes the driver's suspend callback, which also disables the vcc regulator. This leads to an underflow of the regulator enable count if the EEPROM is not present. Move the pm_runtime_suspend() call to be after the error handling path to resolve this. Fixes: cd5676db0574 ("misc: eeprom: at24: support pm_runtime control") Signed-off-by: Michael Auchter <michael.auchter@ni.com> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-02-10eeprom: at24: add TPF0001 ACPI ID for 24c1024 deviceMarkus Pietrek1-0/+1
This ID is used at leas on some variants of MSC C6B-SLH board. Signed-off-by: Markus Pietrek <mpie@msc-ge.com> Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-01-23misc: eeprom: at24: support pm_runtime controlBibby Hsieh1-0/+39
Although in the most platforms, the power of eeprom are alway on, some platforms disable the eeprom power in order to meet low power request. This patch add the pm_runtime ops to control power to support all platforms. Signed-off-by: Bibby Hsieh <bibby.hsieh@mediatek.com> [Bartosz: rebased on top of current at24/for-next] Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-01-09eeprom: at24: remove the write-protect pin supportKhouloud Touil1-9/+0
NVMEM framework is an interface for the at24 EEPROMs as well as for other drivers, instead of passing the wp-gpios over the different drivers each time, it would be better to pass it over the NVMEM subsystem once and for all. Removing the support for the write-protect pin after adding it to the NVMEM subsystem. Signed-off-by: Khouloud Touil <ktouil@baylibre.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-01-02eeprom: at24: sort headers alphabeticallyBartosz Golaszewski1-12/+12
For consistency and easier maintenance: sort the headers alphabetically. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2020-01-02eeprom: at24: update the license tagBartosz Golaszewski1-1/+1
The current GPL v2.0 or later SPDX tag is 'GPL-2.0-or-later' as defined at https://spdx.org/licenses/. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2019-12-01Merge branch 'i2c/for-5.5' of ↵Linus Torvalds1-3/+6
git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux Pull i2c updates from Wolfram Sang: "I2C has mostly driver updates this time. The few noteworthy changes are: the core has now support for analog and digital filters with at91 being the first user, a core addition to replace the NULL returning i2c_new_probed_device() with an ERR_PTR variant, and the pxa driver has finally being moved to use the generic I2C slave interface. We have quite a significant number of reviews per patch this time, so thank you to all involved!" * 'i2c/for-5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (37 commits) video: fbdev: matrox: convert to i2c_new_scanned_device i2c: icy: convert to i2c_new_scanned_device i2c: replace i2c_new_probed_device with an ERR_PTR variant i2c: Fix Kconfig indentation i2c: smbus: Don't filter out duplicate alerts i2c: i801: Correct Intel Jasper Lake SOC naming i2c: i2c-stm32f7: fix 10-bits check in slave free id search loop i2c: iproc: Add i2c repeated start capability i2c: remove helpers for ref-counting clients i2c: tegra: Use dma_request_chan() directly for channel request i2c: sh_mobile: Use dma_request_chan() directly for channel request i2c: qup: Use dma_request_chan() directly for channel request i2c: at91: Use dma_request_chan() directly for channel request i2c: rcar: Remove superfluous call to clk_get_rate() i2c: pxa: remove unused i2c-slave APIs i2c: pxa: migrate to new i2c_slave APIs i2c: cros-ec-tunnel: Make the device acpi compatible i2c: stm32f7: report dma error during probe i2c: icy: no need to populate address for scanned device i2c: xiic: Fix kerneldoc warnings ...
2019-10-04eeprom: Warn that the driver is deprecatedJean Delvare1-0/+4
Deprecating the driver in Kconfig is one thing, but we also need to let the users themselves know. Log a warning each time a device is bound to the deprecated eeprom driver. Signed-off-by: Jean Delvare <jdelvare@suse.de> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Link: https://lore.kernel.org/r/20191002104844.1dc4d8f3@endymion Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-10-04eeprom: at24: Improve confusing log messageJean Delvare1-3/+6
Currently when binding to an spd EEPROM, the at24 drivers logs the following message: 256 byte spd EEPROM, read-only, 0 bytes/write The last part is confusing, as by definition you don't write to a read-only EEPROM, plus "0 bytes/write" makes no sense whatsoever. I propose to have a different message for read-only EEPROMs, which does not include this last part. Signed-off-by: Jean Delvare <jdelvare@suse.de> Cc: Bartosz Golaszewski <bgolaszewski@baylibre.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Wolfram Sang <wsa@the-dreams.de> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2019-09-24Merge branch 'i2c/for-5.4' of ↵Linus Torvalds1-1/+0
git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux Pull i2c updates from Wolfram Sang: - new driver for ICY, an Amiga Zorro card :) - axxia driver gained slave mode support, NXP driver gained ACPI - the slave EEPROM backend gained 16 bit address support - and lots of regular driver updates and reworks * 'i2c/for-5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (52 commits) i2c: tegra: Move suspend handling to NOIRQ phase i2c: imx: ACPI support for NXP i2c controller i2c: uniphier(-f): remove all dev_dbg() i2c: uniphier(-f): use devm_platform_ioremap_resource() i2c: slave-eeprom: Add comment about address handling i2c: exynos5: Remove IRQF_ONESHOT i2c: stm32f7: Make structure stm32f7_i2c_algo constant i2c: cht-wc: drop check because i2c_unregister_device() is NULL safe i2c-eeprom_slave: Add support for more eeprom models i2c: fsi: Add of_put_node() before break i2c: synquacer: Make synquacer_i2c_ops constant i2c: hix5hd2: Remove IRQF_ONESHOT i2c: i801: Use iTCO version 6 in Cannon Lake PCH and beyond watchdog: iTCO: Add support for Cannon Lake PCH iTCO i2c: iproc: Make bcm_iproc_i2c_quirks constant i2c: iproc: Add full name of devicetree node to adapter name i2c: piix4: Add ACPI support i2c: piix4: Fix probing of reserved ports on AMD Family 16h Model 30h i2c: ocores: use request_any_context_irq() to register IRQ handler i2c: designware: Fix optional reset error handling ...
2019-09-04eeprom: Deprecate the legacy eeprom driverJean Delvare1-1/+4
Time has come to get rid of the old eeprom driver. The at24 driver should be used instead. So mark the eeprom driver as deprecated and give users some time to migrate. Then we can remove the legacy eeprom driver completely. Signed-off-by: Jean Delvare <jdelvare@suse.de> Cc: Arnd Bergmann <arnd@arndb.de> Link: https://lore.kernel.org/r/20190902104838.058725c2@endymion Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-09-03Merge tag 'at24-v5.4-updates-for-wolfram' of ↵Wolfram Sang1-1/+0
git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux into i2c/for-5.4 at24: updates for v5.4 - don't include an unneeded header
2019-08-12Merge 5.3-rc4 into char-misc-nextGreg Kroah-Hartman1-1/+1
We need the char-misc fixes in here as well. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-08-01Merge tag 'at24-v5.3-rc3-fixes-for-wolfram' of ↵Wolfram Sang1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux into i2c/for-current at24 fixes for v5.3-rc3 - make spd eeproms world-readable again
2019-07-29Merge 5.3-rc2 into char-misc-nextGreg Kroah-Hartman1-0/+3
We want the char/misc fixes in here as well. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-07-28eeprom: at24: make spd world-readable againJean Delvare1-1/+1
The integration of the at24 driver into the nvmem framework broke the world-readability of spd EEPROMs. Fix it. Signed-off-by: Jean Delvare <jdelvare@suse.de> Cc: stable@vger.kernel.org Fixes: 57d155506dd5 ("eeprom: at24: extend driver to plug into the NVMEM framework") Cc: Andrew Lunn <andrew@lunn.ch> Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Bartosz Golaszewski <brgl@bgdev.pl> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2019-07-25eeprom: make older eeprom drivers select NVMEM_SYSFSArseny Solokha1-0/+3
misc/eeprom/{at24,at25,eeprom_93xx46} drivers all register their corresponding devices in the nvmem framework in compat mode which requires nvmem sysfs interface to be present. The latter, however, has been split out from nvmem under a separate Kconfig in commit ae0c2d725512 ("nvmem: core: add NVMEM_SYSFS Kconfig"). As a result, probing certain I2C-attached EEPROMs now fails with at24: probe of 0-0050 failed with error -38 because of a stub implementation of nvmem_sysfs_setup_compat() in drivers/nvmem/nvmem.h. Update the nvmem dependency for these drivers so they could load again: at24 0-0050: 32768 byte 24c256 EEPROM, writable, 64 bytes/write Cc: Adrian Bunk <bunk@kernel.org> Cc: Bartosz Golaszewski <brgl@bgdev.pl> Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Cc: stable@vger.kernel.org # v5.2+ Signed-off-by: Arseny Solokha <asolokha@kb.kras.ru> Link: https://lore.kernel.org/r/20190716111236.27803-1-asolokha@kb.kras.ru Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-07-25misc: eeprom: max6875: convert to i2c_new_dummy_deviceWolfram Sang1-3/+3
Move from i2c_new_dummy() to i2c_new_dummy_device(), so we now get an ERRPTR which we use in error handling. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Link: https://lore.kernel.org/r/20190722172616.3982-3-wsa+renesas@sang-engineering.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-07-25misc: eeprom: ee1004: convert to i2c_new_dummy_deviceWolfram Sang1-3/+3
Move from i2c_new_dummy() to i2c_new_dummy_device(), so we now get an ERRPTR which we use in error handling. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Link: https://lore.kernel.org/r/20190722172616.3982-2-wsa+renesas@sang-engineering.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-07-22eeprom: at24: remove unneeded includeBartosz Golaszewski1-1/+0
We used to have a call to ilog2() in AT24_DEVICE_MAGIC(). That's long gone so this header is no longer needed. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Acked-by: Wolfram Sang <wsa@the-dreams.de>
2019-07-15Merge branch 'i2c/for-5.3' of ↵Linus Torvalds1-58/+28
git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux Pull i2c updates from Wolfram Sang: "New stuff from the I2C world: - in the core, getting irqs from ACPI is now similar to OF - new driver for MediaTek MT7621/7628/7688 SoCs - bcm2835, i801, and tegra drivers got some more attention - GPIO API cleanups - cleanups in the core headers - lots of usual driver updates" * 'i2c/for-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (74 commits) i2c: mt7621: Fix platform_no_drv_owner.cocci warnings i2c: cpm: remove casting dma_alloc dt-bindings: i2c: sun6i-p2wi: Fix the binding example dt-bindings: i2c: mv64xxx: Fix the example compatible i2c: i801: Documentation update i2c: i801: Add support for Intel Tiger Lake i2c: i801: Fix PCI ID sorting dt-bindings: i2c-stm32: document optional dmas i2c: i2c-stm32f7: Add I2C_SMBUS_I2C_BLOCK_DATA support i2c: core: Tidy up handling of init_irq i2c: core: Move ACPI gpio IRQ handling into i2c_acpi_get_irq i2c: core: Move ACPI IRQ handling to probe time i2c: acpi: Factor out getting the IRQ from ACPI i2c: acpi: Use available IRQ helper functions i2c: core: Allow whole core to use i2c_dev_irq_from_resources eeprom: at24: modify a comment referring to platform data dt-bindings: i2c: omap: Add new compatible for J721E SoCs dt-bindings: i2c: mv64xxx: Add YAML schemas dt-bindings: i2c: sun6i-p2wi: Add YAML schemas i2c: mt7621: Add MediaTek MT7621/7628/7688 I2C driver ...
2019-06-29Merge tag 'at24-v5.3-updates-for-wolfram' of ↵Wolfram Sang1-58/+28
git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux into i2c/for-5.3 at24: updates for v5.3 - simplify the probing code by using devm_i2c_new_dummy_device() - simplify the code further by moving the code around a bit - use struct_size() instead of calculating the required structure size by hand - remove any references to now removed platform data from comments
2019-06-27eeprom: at24: modify a comment referring to platform dataBartosz Golaszewski1-2/+2
We no longer have platform data in at24, so this comment is invalid. Make it refer to device tree & properties instead. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Acked-by: Wolfram Sang <wsa@the-dreams.de>
2019-06-23Merge 5.2-rc6 into char-misc-nextGreg Kroah-Hartman2-8/+2
We need the char-misc fixes in here as well. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-19eeprom: idt_89hpesx: remove unneeded csr_file variableGreg Kroah-Hartman1-4/+2
The csr_file variable was only ever set, never read. So remove it from struct idt_89hpesx_dev as it is pointless to keep around. Cc: Arnd Bergmann <arnd@arndb.de> Cc: Dan Carpenter <dan.carpenter@oracle.com> Cc: Kees Cook <keescook@chromium.org> Cc: Colin Ian King <colin.king@canonical.com> Cc: linux-kernel@vger.kernel.org Reviewed-by: Kees Cook <keescook@chromium.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-19treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500Thomas Gleixner2-8/+2
Based on 2 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 version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-09Merge 5.2-rc4 into char-misc-nextGreg Kroah-Hartman6-34/+6
We want the char/misc driver fixes in here as well. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-05treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441Thomas Gleixner1-4/+1
Based on 1 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 version 2 of the license extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 315 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Armijn Hemel <armijn@tjaldur.nl> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190531190115.503150771@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-31eeprom: at24: use struct_size() in devm_kzalloc()Gustavo A. R. Silva1-3/+2
One of the more common cases of allocation size calculations is finding the size of a structure that has a zero-sized array at the end, along with memory for some number of elements for that array. For example: struct foo { int stuff; struct boo entry[]; }; size = sizeof(struct foo) + count * sizeof(struct boo); instance = devm_kzalloc(dev, size, GFP_KERNEL); Instead of leaving these open-coded and prone to type mistakes, we can now use the new struct_size() helper: instance = devm_kzalloc(dev, struct_size(instance, entry, count), GFP_KERNEL); Notice that, in this case, variable at24_size is not necessary, hence it is removed. This code was detected with the help of Coccinelle. Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2019-05-31eeprom: at24: Remove set but not used variable 'addr'YueHaibing1-2/+0
Fixes gcc '-Wunused-but-set-variable' warning: drivers/misc/eeprom/at24.c: In function at24_make_dummy_client: drivers/misc/eeprom/at24.c:514:21: warning: variable addr set but not used [-Wunused-but-set-variable] It's not used since commit e7308628d0ae ("eeprom: at24: use devm_i2c_new_dummy_device()") Signed-off-by: YueHaibing <yuehaibing@huawei.com> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2019-05-30treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157Thomas Gleixner2-20/+2
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>
2019-05-30treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152Thomas Gleixner2-10/+2
Based on 1 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-28eeprom: at24: drop unnecessary labelBartosz Golaszewski1-25/+18
If we move the nvmem registration above the pm enable calls and the test read, we can drop the error label and make the code more readable as there's now only a single place where we must call pm_runtime_disable() in error path. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2019-05-28eeprom: at24: use devm_i2c_new_dummy_device()Bartosz Golaszewski1-29/+9
Now that it's upstream, use the resource managed version of i2c_new_dummy_device(). Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
2019-05-24eeprom: ee1004: Deal with nack on page selectionJean Delvare1-1/+11
Some EE1004 implementations will not properly ack page selection commands. They still set the page correctly, so there is no actual error. Deal with this case gracefully by checking the currently selected page after we receive a nack. If the page is set right then we can continue. Signed-off-by: Jean Delvare <jdelvare@suse.de> Tested-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-24eeprom: ee1004: Move selected page detection to a separate functionJean Delvare1-10/+21
No functional change, this is in preparation for future needs. Signed-off-by: Jean Delvare <jdelvare@suse.de> Tested-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-21treewide: Add SPDX license identifier - Makefile/KconfigThomas Gleixner1-0/+1
Add SPDX license identifiers to all Make/Kconfig files which: - Have no license information of any form These files fall under the project license, GPL v2 only. The resulting SPDX license identifier is: GPL-2.0-only Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-02-14eeprom: at24: implement support for 'num-addresses' propertyBartosz Golaszewski1-5/+8
If the device node defines 'num-addresses', let it override the default behavior. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2019-02-14eeprom: at24: remove at24_platform_dataBartosz Golaszewski1-87/+75
There are no more users of at24_platform_data. Remove the relevant header and modify the driver code to not use it anymore. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2018-12-10eeprom: at24: add support for 24c2048Adrian Bunk2-1/+4
Works with ST M24M02. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
2018-10-29Merge branch 'i2c/for-4.20' of ↵Linus Torvalds1-21/+22
git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux Pull i2c updates from Wolfram Sang: "I2C has not so much stuff this time. Mostly driver enablement for new SoCs, some driver bugfixes, and some cleanups" * 'i2c/for-4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (35 commits) MAINTAINERS: add maintainer for Renesas RIIC driver i2c: sh_mobile: Remove dummy runtime PM callbacks i2c: uniphier-f: fix race condition when IRQ is cleared i2c: uniphier-f: fix occasional timeout error i2c: uniphier-f: make driver robust against concurrency i2c: i2c-qcom-geni: Simplify irq handler i2c: i2c-qcom-geni: Simplify tx/rx functions i2c: designware: Set IRQF_NO_SUSPEND flag for all BYT and CHT controllers i2c: mux: mlxcpld: simplify code to reach the adapter i2c: mux: ltc4306: simplify code to reach the adapter i2c: mux: pca954x: simplify code to reach the adapter i2c: core: remove level of indentation in i2c_transfer i2c: core: remove outdated DEBUG output i2c: zx2967: use core to detect 'no zero length' quirk i2c: tegra: use core to detect 'no zero length' quirk i2c: qup: use core to detect 'no zero length' quirk i2c: omap: use core to detect 'no zero length' quirk i2c: Convert to using %pOFn instead of device_node.name i2c: brcmstb: Allow enabling the driver on DSL SoCs eeprom: at24: fix unexpected timeout under high load ...
2018-10-15eeprom: New ee1004 driver for DDR4 memoryJean Delvare3-0/+293
The EEPROMs which hold the SPD data on DDR4 memory modules are no longer standard AT24C02-compatible EEPROMs. They are 512-byte EEPROMs which use only 1 I2C address for data access. You need to switch between the lower page and the upper page of data by sending commands on the SMBus. Signed-off-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-10-15eeprom: at25: remove unneeded 'at25_remove'YueHaibing1-10/+0
Fixes gcc '-Wunused-but-set-variable' warning: drivers/misc/eeprom/at25.c: In function 'at25_remove': drivers/misc/eeprom/at25.c:384:20: warning: variable 'at25' set but not used [-Wunused-but-set-variable] Since commit 96d08fb43e30 ("eeprom: at25: use devm_nvmem_register()"), at25_remove is do nothing, so can be removed. Signed-off-by: YueHaibing <yuehaibing@huawei.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-10-02eeprom: at24: fix unexpected timeout under high loadWang Xin1-21/+22
Within at24_loop_until_timeout the timestamp used for timeout checking is recorded after the I2C transfer and sleep_range(). Under high CPU load either the execution time for I2C transfer or sleep_range() could actually be larger than the timeout value. Worst case the I2C transfer is only tried once because the loop will exit due to the timeout although the EEPROM is now ready. To fix this issue the timestamp is recorded at the beginning of each iteration. That is, before I2C transfer and sleep. Then the timeout is actually checked against the timestamp of the previous iteration. This makes sure that even if the timeout is reached, there is still one more chance to try the I2C transfer in case the EEPROM is ready. Example: If you have a system which combines high CPU load with repeated EEPROM writes you will run into the following scenario. - System makes a successful regmap_bulk_write() to EEPROM. - System wants to perform another write to EEPROM but EEPROM is still busy with the last write. - Because of high CPU load the usleep_range() will sleep more than 25 ms (at24_write_timeout). - Within the over-long sleeping the EEPROM finished the previous write operation and is ready again. - at24_loop_until_timeout() will detect timeout and won't try to write. Signed-off-by: Wang Xin <xin.wang7@cn.bosch.com> Signed-off-by: Mark Jonas <mark.jonas@de.bosch.com> Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
2018-09-28eeprom: at25: use devm_nvmem_register()Bartosz Golaszewski1-2/+1
Use the resource managed variant of nvmem_register(). Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-09-28eeprom: eeprom_93xx46: use resource managementBartosz Golaszewski1-14/+5
Use resource managed variants of nvmem_register() and kzalloc(). Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-08-21Merge branch 'i2c/for-4.19' of ↵Linus Torvalds1-0/+17
git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux Pull i2c updates from Wolfram Sang: - the core has now a lockless variant of i2c_smbus_xfer. Some open coded versions of this got removed in drivers. This also enables proper SCCB support in regmap. - locking got a more precise naming. i2c_{un}lock_adapter() had to go, and we know use i2c_lock_bus() consistently with flags like I2C_LOCK_ROOT_ADAPTER and I2C_LOCK_SEGMENT to avoid ambiguity. - the gpio fault injector got a new delicate testcase - the bus recovery procedure got fixed to handle the new testcase correctly - a new quirk flag for controllers not able to handle zero length messages together with driver updates to use it - new drivers: FSI bus attached I2C masters, GENI I2C controller, Owl family S900 - and a good set of driver improvements and bugfixes * 'i2c/for-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (77 commits) i2c: rcar: implement STOP and REP_START according to docs i2c: rcar: refactor private flags i2c: core: ACPI: Make acpi_gsb_i2c_read_bytes() check i2c_transfer return value i2c: core: ACPI: Properly set status byte to 0 for multi-byte writes dt-bindings: i2c: rcar: Add r8a774a1 support dt-bindings: i2c: sh_mobile: Add r8a774a1 support i2c: imx: Simplify stopped state tracking i2c: imx: Fix race condition in dma read i2c: pasemi: remove hardcoded bus numbers on smbus i2c: designware: Add SPDX license tag i2c: designware: Convert to use struct i2c_timings i2c: core: Parse SDA hold time from firmware i2c: designware-pcidrv: Mark expected switch fall-through i2c: amd8111: Mark expected switch fall-through i2c: sh_mobile: use core to detect 'no zero length read' quirk i2c: xlr: use core to detect 'no zero length' quirk i2c: rcar: use core to detect 'no zero length' quirk i2c: stu300: use core to detect 'no zero length' quirk i2c: pmcmsp: use core to detect 'no zero length' quirk i2c: mxs: use core to detect 'no zero length' quirk ...
2018-08-05misc: eeprom: assignment outside the if statementParth Y Shah1-1/+2
Assignment of any variable should be kept outside the if statement Signed-off-by: Parth Y Shah <sparth1292@gmail.com> Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-08-02eeprom: idt_89hpesx: clean up an error pointer vs NULL inconsistencyDan Carpenter1-1/+1
We check for IS_ERR_OR_NULL() here, but later we check the same thing for NULL only. It turns out that it can only be NULL so we can make the checking consistent by removing the ERR_PTR stuff. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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