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2014-01-13i2c: fti2c010: fix compiler warning on paddr[]Kuo-Jung Su
This fixes the following compiler warnings: fti2c010.c: In function 'fti2c010_read': fti2c010.c:204:8: warning: 'paddr' may be used uninitialized in this function [-Wuninitialized] fti2c010.c: In function 'fti2c010_write': fti2c010.c:266:8: warning: 'paddr' may be used uninitialized in this function [-Wuninitialized] Signed-off-by: Kuo-Jung Su <dantesu@faraday-tech.com> Cc: Heiko Schocher <hs@denx.de>
2014-01-13drivers/designware_i2c - add suppor of CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOWAlexey Brodkin
Since we agreed on legacy implementation of "eeprom_{read|write}" (http://patchwork.ozlabs.org/patch/295825/) I had to fix/make it work again DesignWare I2C driver for cases when 1 EEPROM IC fake I2C with anumber of "built-in" ICs with different chip addresses. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> Cc: Tom Rini <trini@ti.com> cc: Armando Visconti <armando.visconti@st.com> Cc: Stefan Roese <sr@denx.de> Cc: Albert ARIBAUD <albert.u.boot@aribaud.net> Cc: Heiko Schocher <hs@denx.de> Cc: Vipin KUMAR <vipin.kumar@st.com> Cc: Tom Rix <Tom.Rix@windriver.com> Cc: Mischa Jonker <mjonker@synopsys.com> Cc: Kuo-Jung Su <dantesu@faraday-tech.com>
2014-01-13i2c: Fix i2c speed commandDarwin Rambo
This corrects i2c core to interpret the value returned by i2c_set_bus_speed as a success indicator rather than the actual speed that was set. When i2c_set_bus_speed returns a failure code, the speed is unknown so the adapter speed is set to zero. Signed-off-by: Darwin Rambo <drambo@broadcom.com> Reviewed-by: Tim Kryger <tim.kryger@linaro.org> Reviewed-by: Steve Rae <srae@broadcom.com> Acked-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
2014-01-13rcar_i2c: Clear status before start master receiveNobuhiro Iwamatsu
Signed-off-by: Hisashi Nakamura <hisashi.nakamura.ak@renesas.com> Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
2014-01-13rcar_i2c: Fix receiving wait conditionHisashi Nakamura
Signed-off-by: Hisashi Nakamura <hisashi.nakamura.ak@renesas.com> Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
2013-12-18i2c: tegra: Add the fifth bus on SoC with more than 4 busesAlban Bedel
Create the i2c adapter object for the fifth bus on SoC with more than 4 buses. This allow using all the bus available on T30. Signed-off-by: Alban Bedel <alban.bedel@avionic-design.de> Acked-by: Heiko Schocher <hs@denx.de> Signed-off-by: Tom Warren <twarren@nvidia.com>
2013-12-10Merge branch 'master' of git://git.denx.de/u-boot-armTom Rini
Conflicts: board/samsung/trats2/trats2.c include/configs/exynos5250-dt.h Signed-off-by: Tom Rini <trini@ti.com>
2013-12-10Merge branch 'u-boot/master' into 'u-boot-arm/master'Albert ARIBAUD
Conflicts: arch/arm/cpu/armv7/rmobile/Makefile doc/README.scrapyard Needed manual fix: arch/arm/cpu/armv7/omap-common/Makefile board/compulab/cm_t335/u-boot.lds
2013-12-06i2c: samsung: register i2c busses for Exynso5420 and Exynos5250Naveen Krishna Ch
This patch adds the U_BOOT_I2C_ADAP_COMPLETE defines for channels on Exynos5420 and Exynos5250 and also adds support for init function for hsi2c channels Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com>
2013-12-05arm: omap: i2c: don't zero cnt in i2c_writeNikita Kiryanov
Writing zero into I2Ci.I2C_CNT register causes random I2C failures in OMAP3 based devices. This seems to be related to the following advisory which apears in multiple erratas for OMAP3 SoCs (OMAP35xx, DM37xx), as well as OMAP4430 TRM: Advisory: I2C Module Does Not Allow 0-Byte Data Requests Details: When configured as the master, the I2C module does not allow 0-byte data transfers. Note: Programming I2Ci.I2C_CNT[15:0]: DCOUNT = 0 will cause undefined behavior. Workaround(s): No workaround. Do not use 0-byte data requests. The writes in question are unnecessary from a functional point of view. Most of them are done after I/O has finished, and the only one that preceds I/O (in i2c_probe()) is also unnecessary because a stop bit is sent before actual data transmission takes place. Therefore, remove all writes that zero the cnt register. Cc: Heiko Schocher <hs@denx.de> Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Cc: Tom Rini <trini@ti.com> Cc: Lubomir Popov <lpopov@mm-sol.com> Cc: Enric Balletbo Serra <eballetbo@gmail.com> Signed-off-by: Nikita Kiryanov <nikita@compulab.co.il> Tested-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Tested-by: Lubomir Popov <lpopov@mm-sol.com>
2013-12-05i2c: fti2c010: serial out r/w address in MSB orderKuo-Jung Su
For a eeprom with a 2-bytes address (e.g., Ateml AT24C1024B), the r/w address should be serial out in MSB order. Signed-off-by: Kuo-Jung Su <dantesu@faraday-tech.com> Cc: Heiko Schocher <hs@denx.de>
2013-12-05i2c: fti2c010: migrate to new i2c modelKuo-Jung Su
Replace the legacy i2c model with the new one. Signed-off-by: Kuo-Jung Su <dantesu@faraday-tech.com> Cc: Heiko Schocher <hs@denx.de>
2013-12-05i2c: fti2c010: cosmetic: coding style cleanupKuo-Jung Su
Coding style cleanup Signed-off-by: Kuo-Jung Su <dantesu@faraday-tech.com> Cc: Heiko Schocher <hs@denx.de>
2013-12-05driver:i2c:s3c24x0: fix clock init for hsi2cPiotr Wilczek
Fix clock value initialisation for Exynos other than Exynos5 for hsi2c. Signed-off-by: Piotr Wilczek <p.wilczek@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Cc: Minkyu Kang <mk7.kang@samsung.com> Cc: Heiko Schocher <hs@denx.de>
2013-12-05driver:i2c:s3c24x0: adapt driver to new i2cPiotr Wilczek
This patch adapts the s3c24x0 driver to the new i2c framework. Config file is modified for all the boards that use the driver. Signed-off-by: Piotr Wilczek <p.wilczek@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> CC: Minkyu Kang <mk7.kang@samsung.com> CC: Heiko Schocher <hs@denx.de> CC: Inderpal Singh <inderpal.singh@linaro.org> CC: David Müller <d.mueller@elsoft.ch> CC: Chander Kashyap <k.chander@samsung.com> CC: Lukasz Majewski <l.majewski@samsung.com> Tested-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com> Reviewed-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com>
2013-11-13i2c: switch from AT91 legacy to ATMEL legacyAndreas Bießmann
Since the required API is gpio which is enclosed with CONFIG_ATMEL_LEGACY use that switch here. Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com> Acked-by: Heiko Schocher <hs@denx.de>
2013-11-13designware_i2c: remove 10msec delay in i2c_xfer_finishAlexey Brodkin
This delay applies to any data transfer on I2C bus. For example 1kB data read with per-byte access (which happens if environment is stored in I2C EEPROM) takes more than 10 seconds. Moreover data bus driver has to care about bus state and data transfer, but not about internal states of attached devices. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> Cc: Tom Rini <trini@ti.com> cc: Armando Visconti <armando.visconti@st.com> Cc: Stefan Roese <sr@denx.de> Cc: Albert ARIBAUD <albert.u.boot@aribaud.net> Cc: Heiko Schocher <hs@denx.de> Cc: Vipin KUMAR <vipin.kumar@st.com> Cc: Tom Rix <Tom.Rix@windriver.com> Cc: Mischa Jonker <mjonker@synopsys.com>
2013-11-13designware_i2c: disable i2c controller during target address setupAlexey Brodkin
As it is stated in DesignWare I2C databook: writes to IC_TAR (0x4) register succeed only when IC_ENABLE[0] is set to 0. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> Cc: Tom Rini <trini@ti.com> cc: Armando Visconti <armando.visconti@st.com> Cc: Stefan Roese <sr@denx.de> Cc: Albert ARIBAUD <albert.u.boot@aribaud.net> Cc: Heiko Schocher <hs@denx.de> Cc: Vipin KUMAR <vipin.kumar@st.com> Cc: Tom Rix <Tom.Rix@windriver.com> Cc: Mischa Jonker <mjonker@synopsys.com>
2013-11-13i2c, omap1510: remove i2c driverHeiko Schocher
remove omap1510 i2c driver, as there is no board which uses it Signed-off-by: Heiko Schocher <hs@denx.de> Cc: Tom Rini <trini@ti.com> Cc: Jian Zhang <jzhang@ti.com>
2013-11-13i2c, zynq: convert zynq i2c driver to new multibus/multiadapter frameworkHeiko Schocher
- add zync i2c driver to new multibus/multiadpater support - adapted all config files, which uses this driver Signed-off-by: Heiko Schocher <hs@denx.de> Cc: Joe Hershberger <joe.hershberger@ni.com> Cc: Michal Simek <michal.simek@xilinx.com>
2013-11-13i2c, omap24xx: convert driver to new mutlibus/mutliadapter frameworkHeiko Schocher
- add omap24xx driver to new multibus/multiadpater support - adapted all config files, which uses this driver Tested on the am335x based siemens boards rut, dxr2 and pxm2 posted here: http://patchwork.ozlabs.org/patch/263211/ Signed-off-by: Heiko Schocher <hs@denx.de> Tested-by: Tom Rini <trini@ti.com> Cc: Lars Poeschel <poeschel@lemonage.de> Cc: Steve Sakoman <sakoman@gmail.com> Cc: Thomas Weber <weber@corscience.de> Cc: Tom Rix <Tom.Rix@windriver.com> Cc: Grazvydas Ignotas <notasas@gmail.com> Cc: Enric Balletbo i Serra <eballetbo@iseebcn.com> Cc: Luca Ceresoli <luca.ceresoli@comelit.it> Cc: Igor Grinberg <grinberg@compulab.co.il> Cc: Ilya Yanok <yanok@emcraft.com> Cc: Stefano Babic <sbabic@denx.de> Cc: Nishanth Menon <nm@ti.com> Cc: Pali Rohár <pali.rohar@gmail.com> Cc: Peter Barada <peter.barada@logicpd.com> Cc: Nagendra T S <nagendra@mistralsolutions.com> Cc: Michael Jones <michael.jones@matrix-vision.de> Cc: Raphael Assenat <raph@8d.com> Acked-by: Igor Grinberg <grinberg@compulab.co.il> Acked-by: Stefano Babic <sbabic@denx.de>
2013-11-13i2c: mxs_i2c: Squash endless loopMarek Vasut
The endless waiting for a bit to be set can cause a hang, add a timeout so we prevent such situation. A testcase for such a hang is below. The testcase assumes a device to be present at address 0x50 and a device to NOT be present at address 0x42 . Also note that the "sleep 1" induced delays are imperative for this bug to manifest . i2c read 0x42 0x0.2 0x10 0x42000000 ; sleep 1 ; \ i2c read 0x50 0x0.2 0x10 0x42000000 ; sleep 1 ; \ i2c read 0x42 0x0.2 0x10 0x42000000 The expected result of the above command is: Error reading the chip. Error reading the chip. While without this patch, we observe a hang in the last read from 0x42 precisely when waiting for this bit to be set. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Fabio Estevam <fabio.estevam@freescale.com> Cc: Heiko Schocher <hs@denx.de> Cc: Stefano Babic <sbabic@denx.de>
2013-11-13i2c: sh_i2c: Update to new CONFIG_SYS_I2C frameworkNobuhiro Iwamatsu
This updates to new I2C framwwork on sh_i2c. And this also updates boards(kzm9g and ecovec) that using sh_i2c. Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com> Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
2013-10-31drivers: convert makefiles to Kbuild styleMasahiro Yamada
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
2013-10-17i2c: eliminate warnings in i2c_reloc_fixup functionMasahiro Yamada
The prototype of handlers had changed. This commit uses cast with (void *) rather than the handler-specific prototype. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
2013-10-17i2c: s3c24xx: add hsi2c controller supportNaveen Krishna Ch
Add support for hsi2c controller available on exynos5420. Note: driver currently supports only fast speed mode 100kbps Change-Id: I02555b1dc8f4ac21c50aa5158179768563c92f43 Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com> Signed-off-by: Vadim Bendebury <vbendeb@chromium.org> Signed-off-by: R. Chandrasekar <rc.sekar@samsung.com>
2013-10-17exynos: i2c: Change FDT bus setup code to enumerate ports correctlySimon Glass
At present the i2c ports are enumerated in a strange way - the fdtdec_find_aliases_for_id() function is used, but then the ID returned is ignored and the ports are renumbered. The effect is the same provided that the device tree has the ports in the same order, or uses aliases, and has no gaps, but it is not correct. Adjust the code to use the function as intended. This will allows device tree aliases to change the device order if required. As a result, the i2c_busses variable is dropped. We can't be sure that there are no 'holes' in the list of buses, so must check the whole array. Note: it seems that non-FDT operation is now broken in this drive and will need to be reinstated for upstream. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-on: https://gerrit.chromium.org/gerrit/59369 Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com>
2013-10-17exynos: i2c: Fix i2c driver to handle NACKs properlyNaveen Krishna Ch
The Exynos5 i2c driver does not handle NACKs properly. This change: - fixes the NACK processing problem (do not continue transaction if address cycle was NACKed) - eliminates a fair amount of duplicate code Signed-off-by: Vadim Bendebury <vbendeb@chromium.org> Reviewed-by: Simon Glass <sjg@google.com> Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com>
2013-10-17Fix: nommu I2C adapter relocation errorJens Scharsig (BuS Elektronik)
NoMMU systems have a access violation problem with i2c_reloc_fixup. Blame for it is a double relocation of the adapter itself. The i2c_adap_p is already relocated, if i2c_reloc_fixup is called. This patch removes the relocation of i2c_adap_p from i2c_reloc_fixup to fix this. Signed-off-by: Jens Scharsig (BuS Elektronik) <esw@bus-elektronik.de>
2013-10-17i2c: sh_i2c: Avoid using I2C prior to relocationNobuhiro Iwamatsu
If user uses the I2C in before the relocation, board of sh and rmobile will not start. This will solve this problem. Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
2013-10-17i2c, core: optimze i2c_set_bus_num()Heiko Schocher
check first, if we are on the bus, we want to enable. If so, return immediately, do not calc max adapter number, nor check other things. Signed-off-by: Heiko Schocher <hs@denx.de> Cc: Lukasz Majewski <l.majewski@samsung.com> Acked-by: Lukasz Majewski <l.majewski@samsung.com>
2013-10-17i2c: Add support for Renesas rcarNobuhiro Iwamatsu
This supports i2c controller for Renesas rcar. Signed-off-by: Hisashi Nakamura <hisashi.nakamura.ak@renesas.com> Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
2013-10-17i2c: Zynq: Support for TI PCA9548 bus multiplexerMichael Burr
(Interface is not quite the same as Phillips PCA9547.) Signed-off-by: Michael Burr <michael.burr@logicpd.com> Cc: Heiko Schocher <hs@denx.de> Cc: Michal Simek <monstr@monstr.eu>
2013-10-17i2c: mxc: move to new subsystemtrem
Signed-off-by: Philippe Reynes <tremyfr@yahoo.fr>
2013-09-19drivers: s3c44b0_i2c: delete an unused driverMasahiro Yamada
Since commit 5dc5f36 removed B2 board support, there are no boards enabling s3c44b0_i2c. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Cc: Wolfgang Denk <wd@denx.de> Cc: Andrea Scian <andrea.scian@dave-tech.it> Acked-by: Heiko Schocher <hs@denx.de>
2013-08-20fsl_i2c: add workaround for the erratum I2C A004447Chunhe Lan
This workaround is for the erratum I2C A004447. Device reference manual provides a scheme that allows the I2C master controller to generate nine SCL pulses, which enable an I2C slave device that held SDA low to release SDA. However, due to this erratum, this scheme no longer works. In addition, when I2C is used as a source of the PBL, the state machine is not able to recover. At the same time, delete the reduplicative definition of SVR_VER and SVR_REV. The SVR_REV is the low 8 bits rather than the low 16 bits of svr. And we use the CONFIG_SYS_FSL_A004447_SVR_REV macro instead of hard-code value 0x10, 0x11 and 0x20. The CONFIG_SYS_FSL_A004447_SVR_REV = 0x00 represents that one version of platform has this I2C errata. So enable this errata by IS_SVR_REV(svr, maj, min) function. Signed-off-by: Zhao Chenhui <chenhui.zhao@freescale.com> Signed-off-by: Chunhe Lan <Chunhe.Lan@freescale.com> Cc: Scott Wood <scottwood@freescale.com> Cc: Heiko Schocher <hs@denx.de>
2013-08-20fsl_i2c: generate nine pulses on SCL if the I2C bus is hungChunhe Lan
When the code detected that the bus is hung (e.g. SDA stuck low), send 9 pulses on SCL to try to fixup the bus. Signed-off-by: Zhao Chenhui <chenhui.zhao@freescale.com> Signed-off-by: Chunhe Lan <Chunhe.Lan@freescale.com> Cc: Scott Wood <scottwood@freescale.com> Cc: Heiko Schocher <hs@denx.de>
2013-08-13tegra: Avoid using I2C prior to relocationSimon Glass
Tegra recently moved to the new I2C framework, which sets up I2C prior to relocation, and prior to calling i2c_init_board(). This causes a crash on Tegra boards. Tested-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Simon Glass <sjg@chromium.org>
2013-08-03i2c: soft: Fix typo in CONFIG_SYS_I2C_SOFT_SPEEDMarek Vasut
In case only the CONFIG_SYS_I2C_SPEED is set in configuration file, the CONFIG_SYS_I2C_SOFT_SPEED is defined as CONFIG_SYS_I2C_SPEED. The CONFIG_SYS_I2C_SOFT_SPEED is then used throughout the driver. Unfortunatelly, due to a typo in the driver, instead of defining CONFIG_SYS_I2C_SOFT_SPEED, an CONFIG_SYS_SOFT_I2C_SPEED was defined and therefore the driver failed to compile. The same applies for CONFIG_SYS_I2C_SOFT_SLAVE , where the swap happens as well. This patch fixes the issue. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Heiko Schocher <hs@denx.de>
2013-07-25drivers/i2c: Update fti2c010.[ch], i2c_core.c to use SPDX identifiersTom Rini
Acked-by: Heiko Schocher <hs@denx.de> Signed-off-by: Tom Rini <trini@ti.com>
2013-07-24Merge branch 'master' of git://git.denx.de/u-boot-i2cTom Rini
The sandburst-specific i2c drivers have been deleted, conflict was just over the SPDX conversion. Conflicts: board/sandburst/common/ppc440gx_i2c.c board/sandburst/common/ppc440gx_i2c.h Signed-off-by: Tom Rini <trini@ti.com>
2013-07-24Add GPL-2.0+ SPDX-License-Identifier to source filesWolfgang Denk
Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com>
2013-07-23i2c: add Faraday FTI2C010 I2C controller supportKuo-Jung Su
Faraday FTI2C010 is a multi-function I2C controller which supports both master and slave mode. This patch simplily implements the master mode only. Signed-off-by: Kuo-Jung Su <dantesu@faraday-tech.com> CC: Heiko Schocher <hs@denx.de>
2013-07-23I2C: mxc_i2c: Add support for Vybrid VF610 platformAlison Wang
This patch adds support for Vybrid VF610 platform. There are some differences between i.MX6 and Vybrid for I2C controller. (1) The registers' offset are different. (2) The I2C clock divider values are different. (3) In I2C control register, the enable/disable/reset bit is inverted for Vybrid comparing to i.MX6. (4) In I2C status register, the interrupt flag bit is cleared by writing "1" for Vybrid. For i.MX6, this bit is cleared by writing "0". (5) In I2C status register, the arbitration lost flag bit is cleared by writing "1" for Vybrid. For i.MX6, this bit is cleared by writing "0". Signed-off-by: Alison Wang <b18965@freescale.com>
2013-07-23i2c, ppc4xx_i2c: switch to new multibus/multiadapter supportDirk Eibach
Signed-off-by: Dirk Eibach <dirk.eibach@gdsys.cc> Cc: Heiko Schocher <hs@denx.de> Cc: Stefan Roese <sr@denx.de> Tested-by: Stefan Roese <sr@denx.de>
2013-07-23tegra: i2c: Enable new CONFIG_SYS_I2C frameworkSimon Glass
This enables CONFIG_SYS_I2C on Tegra, updating existing boards and the Tegra i2c driver to support this. Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Heiko Schocher <hs@denx.de>
2013-07-23tegra: i2c: Add function to know about current busSimon Glass
Rather than using a variable in various places, add a single function, tegra_i2c_get_bus(), which returns a pointer to information about a bus. This will make it easier to move to the new i2c framework. Signed-off-by: Simon Glass <sjg@chromium.org>
2013-07-23i2c, fsl_i2c: switch to new multibus/multiadapter supportHeiko Schocher
- added to fsl_i2c driver new multibus/multiadpater support - adapted all config files, which uses this driver Signed-off-by: Heiko Schocher <hs@denx.de> Cc: Simon Glass <sjg@chromium.org> Cc: Stephen Warren <swarren@wwwdotorg.org>
2013-07-23i2c, soft-i2c: switch to new multibus/multiadapter supportHeiko Schocher
- added to soft_i2c driver new multibus/multiadpater support - adapted all config files, which uses this driver Signed-off-by: Heiko Schocher <hs@denx.de> Cc: Simon Glass <sjg@chromium.org> Cc: Stephen Warren <swarren@wwwdotorg.org>
2013-07-23i2c: add i2c_core and prepare for new multibus supportHeiko Schocher
This Patch introduce the new i2c_core file, which holds the I2C core functions, for the rework of the multibus/ multiadapter support. Also adds changes in i2c.h for the new I2C multibus/multiadapter support. This new support can be activated with the CONFIG_SYS_I2C define. Signed-off-by: Heiko Schocher <hs@denx.de> Signed-off-by: Simon Glass <sjg@chromium.org> Cc: Mike Frysinger <vapier@gentoo.org> Cc: Stephen Warren <swarren@wwwdotorg.org>