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path: root/src/soc/mediatek/common/i2c.c
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2021-11-26soc/mediatek/i2c: Return negative values on errorYu-Ping Wu
Following coreboot's convention, return negative error codes from platform_i2c_transfer(). BUG=none TEST=emerge-asurada coreboot BRANCH=none Change-Id: I955b9aae11e20d75fac414d15714330e364dad2f Signed-off-by: Yu-Ping Wu <yupingso@chromium.org> Reviewed-on: https://review.coreboot.org/c/coreboot/+/59539 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
2021-11-17soc/mediatek: move i2c function to common folderRex-BC Chen
Move mtk_i2c_max_step_cnt, mtk_i2c_check_ac_timing, mtk_i2c_speed_init and mtk_i2c_calculate_speed to common folder to share with MT8186. TEST=test on tomato ok TEST=emerge-asurada coreboot BUG=b:202871018 Signed-off-by: Rex-BC Chen <rex-bc.chen@mediatek.com> Change-Id: I4a702741c763bf9261cea90d0d71c08b6e28c261 Reviewed-on: https://review.coreboot.org/c/coreboot/+/59295 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Yu-Ping Wu <yupingso@google.com>
2021-10-02soc/mediatek: Fix I2C failures by adjusting AC timing and bus speedDaolong Zhu
1. The original algorithm for I2C speed cannot always make the timing meet I2C specification so a new algorithm is introduced to calculate the timing parameters more correctly. 2. Some I2C buses should be initialized in a different speed while the original implementation was fixed at fast mode (400Khz). So the mtk_i2c_bus_init is now also taking an extra speed parameter. There is an equivalent change in kernel side: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/i2c/busses/i2c-mt65xx.c?h=v5.15-rc3&id=be5ce0e97cc7a5c0d2da45d617b7bc567c3d3fa1 BUG=b:189899864 TEST=Test on Tomato, boot pass and timing pass at 100/300/400/500/800/1000Khz. Signed-off-by: Daolong Zhu <jg_daolongzhu@mediatek.corp-partner.google.com> Change-Id: Id25b7bb3a76908a7943b940eb5bee799e80626a0 Reviewed-on: https://review.coreboot.org/c/coreboot/+/58053 Reviewed-by: Rex-BC Chen <rex-bc.chen@mediatek.corp-partner.google.com> Reviewed-by: Yu-Ping Wu <yupingso@google.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2020-12-14soc/mediatek/mt8192: add i2c driver supportQii Wang
Add I2C controller for MT8192, and revise the common I2C driver to support I2C controller running in APDMA async mode. In that case we have to initiate a different handshake protocol and reset I2C differently. BUG=b:155715435 TEST=Asurada boots up to shell Signed-off-by: Qii Wang <qii.wang@mediatek.com> Change-Id: I13835e00eb674a93aa5496a9870d1e601e263368 Reviewed-on: https://review.coreboot.org/c/coreboot/+/47800 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Hung-Te Lin <hungte@chromium.org>
2020-05-11treewide: Remove "this file is part of" linesPatrick Georgi
Stefan thinks they don't add value. Command used: sed -i -e '/file is part of /d' $(git grep "file is part of " |egrep ":( */\*.*\*/\$|#|;#|-- | *\* )" | cut -d: -f1 |grep -v crossgcc |grep -v gcov | grep -v /elf.h |grep -v nvramtool) The exceptions are for: - crossgcc (patch file) - gcov (imported from gcc) - elf.h (imported from GNU's libc) - nvramtool (more complicated header) The removed lines are: - fmt.Fprintln(f, "/* This file is part of the coreboot project. */") -# This file is part of a set of unofficial pre-commit hooks available -/* This file is part of coreboot */ -# This file is part of msrtool. -/* This file is part of msrtool. */ - * This file is part of ncurses, designed to be appended after curses.h.in -/* This file is part of pgtblgen. */ - * This file is part of the coreboot project. - /* This file is part of the coreboot project. */ -# This file is part of the coreboot project. -# This file is part of the coreboot project. -## This file is part of the coreboot project. --- This file is part of the coreboot project. -/* This file is part of the coreboot project */ -/* This file is part of the coreboot project. */ -;## This file is part of the coreboot project. -# This file is part of the coreboot project. It originated in the - * This file is part of the coreinfo project. -## This file is part of the coreinfo project. - * This file is part of the depthcharge project. -/* This file is part of the depthcharge project. */ -/* This file is part of the ectool project. */ - * This file is part of the GNU C Library. - * This file is part of the libpayload project. -## This file is part of the libpayload project. -/* This file is part of the Linux kernel. */ -## This file is part of the superiotool project. -/* This file is part of the superiotool project */ -/* This file is part of uio_usbdebug */ Change-Id: I82d872b3b337388c93d5f5bf704e9ee9e53ab3a9 Signed-off-by: Patrick Georgi <pgeorgi@google.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/41194 Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2020-04-05soc/mediatek: Use SPDX for GPL-2.0-only filesAngel Pons
Done with sed and God Lines. Only done for C-like code for now. Change-Id: I7c3c75eaf2d7a64e7d833541bcf168b93921a142 Signed-off-by: Angel Pons <th3fanbus@gmail.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/40132 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
2020-03-18soc: Remove copyright noticesPatrick Georgi
They're listed in AUTHORS and often incorrect anyway, for example: - What's a "Copyright $year-present"? - Which incarnation of Google (Inc, LLC, ...) is the current copyright holder? - People sometimes have their editor auto-add themselves to files even though they only deleted stuff - Or they let the editor automatically update the copyright year, because why not? - Who is the copyright holder "The coreboot project Authors"? - Or "Generated Code"? Sidestep all these issues by simply not putting these notices in individual files, let's list all copyright holders in AUTHORS instead and use the git history to deal with the rest. Change-Id: I4c110f60b764c97fab2a29f6f04680196f156da5 Signed-off-by: Patrick Georgi <pgeorgi@google.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/39610 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Angel Pons <th3fanbus@gmail.com> Reviewed-by: David Hendricks <david.hendricks@gmail.com>
2019-11-11soc/mediatek: Add missing '#include <console/console.h>'Elyes HAOUAS
Change-Id: I2e79ff3352fe974a070b7b3f5e4b5570ed2b294c Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr> Reviewed-on: https://review.coreboot.org/c/coreboot/+/36454 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de>
2019-08-02mediatek: Refactor I2C code among similar SOCsQii Wang
Refactor I2C code which will be reused among similar SOCs. BUG=b:80501386 BRANCH=none TEST=emerge-elm coreboot Change-Id: I407d5e2a9eb29562b40bb300e39f206a94afe76c Signed-off-by: qii wang <qii.wang@mediatek.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/30975 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Yu-Ping Wu <yupingso@google.com> Reviewed-by: Julius Werner <jwerner@chromium.org>
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