summaryrefslogtreecommitdiff
path: root/include
AgeCommit message (Collapse)Author
2019-07-29davinci: da850-evm: enable driver model for NANDBartosz Golaszewski
Enable the driver-model on da850-evm. We need to add a dummy nand node to the device tree, as the real nand node is a sub-node of the aemif device. On linux the aemif driver populates all its child nodes, but we can't do it in u-boot currently. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Tested-by: Adam Ford <aford173@gmail.com> #da850-evm
2019-07-29davinci: omapl138-lcdk: enable driver model for NANDBartosz Golaszewski
Enable the driver-model on da850-lcdk. We need to add a dummy nand node to the device tree, as the real nand node is a sub-node of the aemif device. On linux the aemif driver populates all its child nodes, but we can't do it in u-boot currently. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2019-07-29i2c: remove i2c driver-model compatibility layerBartosz Golaszewski
There are no more users of the compatibility layer for i2c. Remove the driver and all references to it. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Acked-by: Heiko Schocher <hs@denx.de>
2019-07-29davinci: remove CONFIG_DM_I2C_COMPAT from defconfigsBartosz Golaszewski
This option is no longer used on any davinci board but still selected in defconfigs which causes the following warning: ===================== WARNING ====================== This board uses CONFIG_DM_I2C_COMPAT. Please remove (possibly in a subsequent patch in your series) before sending patches to the mailing list. ==================================================== Remove all references to CONFIG_DM_I2C_COMPAT from davinci. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Acked-by: Heiko Schocher <hs@denx.de>
2019-07-29Merge branch '2019-07-29-master-imports'Tom Rini
- Assorted bug fixes
2019-07-29rtc: move RTC_RX8025 to KconfigHeiko Schocher
move RTC_RX8025 to Kconfig and fixup board configs. Signed-off-by: Heiko Schocher <hs@denx.de>
2019-07-29board: mediatek: Add pumpkin board supportFabien Parent
The pumpkin board is made by Gossamer Engineering and is using a MediaTek SoC. The board currently comes in two available version: MT8516 SoC and MT8167 SoC. The board provides the following IOs: eMMC, NAND, SD card, USB type-A, Ethernet, Wi-Fi, Bluetooth, Audio (jack out, 2 PDM port, 1 analog in), serial over USB, and an expansion header. Additionally there is a HDMI port, DSI port, and camera port only on the MT8167 version of the board. The board can be powered by battery and/or via a USB Type-C port and is using a PMIC MT6392. The eMMC and NAND are sharing pins and cannot be used together. This commit is adding the basic boot support for the Pumpkin MT8516 board on the eMMC. Signed-off-by: Fabien Parent <fparent@baylibre.com>
2019-07-29gpio: fixes for gpio-hog supportHeiko Schocher
recently added gpio hog patch was "in discussion" state with Simon Glass. This patch now adds most of comments from Simon Glass. Signed-off-by: Heiko Schocher <hs@denx.de>
2019-07-29common: Move bootm_decomp_image() to image.c (as image_decomp())Julius Werner
Upcoming patches want to add decompression to use cases that are no longer directly related to booting. It makes sense to retain a single decompression routine, but it should no longer be in bootm.c (which is not compiled for all configurations). This patch moves bootm_decomp_image() to image.c and renames it to image_decomp() in preparation of those upcoming patches. Signed-off-by: Julius Werner <jwerner@chromium.org> Reviewed-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com> [trini: Fix warning around handle_decomp_error being unused] Signed-off-by: Tom Rini <trini@konsulko.com>
2019-07-29Merge https://gitlab.denx.de/u-boot/custodians/u-boot-socfpgaTom Rini
- Various gen5 fixes
2019-07-29Merge tag 'video-for-2019.10' of ↵Tom Rini
https://gitlab.denx.de/u-boot/custodians/u-boot-video - dcu and imx7 DM_VIDEO conversion - lb070wv8 compatible in simple_panel driver - bmp_logo improvements for DM_VIDEO - EDID updates to filter supported modes - meson_dw_hdmi: support EDID mode filtering - dw_hdmi: support ddc-i2c-bus phandle for external I2C masters - fix rpi crash when firmware doesn't report connected display
2019-07-29Merge tag 'u-boot-rockchip-20190729' of ↵Tom Rini
https://gitlab.denx.de/u-boot/custodians/u-boot-rockchip - Clean up and migrate to use common rockchip spl board file - Clean up and migrate to use common rockchip board file - Increase rk3288 CONFIG_SYS_BOOTM_LEN to 16MB
2019-07-29rockchip: rk3328: add STIMER_BASE definitionKever Yang
Add the CONFIG_ROCKCHIP_STIMER_BASE so that we can use the stimer init function in tpl.c and spl.c Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
2019-07-29video: dw_hdmi: Add support for ddc-i2c-bus propertyNiklas Schulze
Add support for the ddc-i2c-bus device tree property which allows for using an external i2c master for reading the display's EDID. Signed-off-by: Niklas Schulze <me@jns.io>
2019-07-29video: display: use edid_get_timing_validate() variant to filter supported ↵Neil Armstrong
EDID modes Introduce a new display op, mode_valid() to be used with the newly introduced edid_get_timing_validate() function, to filter supported monitor timings if handled by the display driver. Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
2019-07-29edid: add edid_get_timing_validate() variant to filter out edid modesNeil Armstrong
The original edid_get_timing() function returns the first valid timing, but on some plaforms, we could only supports a subset of the listed monitot's navite timing. Let's introduce a edid_get_timing_validate() adding a mode_valid callback including a private cookie pointer. If the callback returns false, the current timing is discared and the next one is checked. If no valid & supported timings are found, the function would return an error. Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
2019-07-29colibri-imx6ull: support building with DM_VIDEO=yIgor Opaniuk
1. This fixes linking issues when building with DM_VIDEO enabled mxsfb driver. 2. Provide proper defines for both VIDEO=y and DM_VIDEO=y. Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com> Reviewed-by: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>
2019-07-29video: fsl_dcu_fb: refactor init functionsIgor Opaniuk
Move dcu-related code to fsl_dcu_probe_common, keep in video_hw_init() only legacy video stack (filling GraphicPanel struct etc.). Add wrappers for all init functions, that will let to provide struct fb_info as an additional param (needed for further moving it from the global scope to driver private data struct in DM converted driver). Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com> Reviewed-by: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>
2019-07-27Merge branch '2019-07-26-ti-imports'Tom Rini
- Bring in the rest of the J271E platform - Various OMAP3/AM3517, DA850 fixes
2019-07-27env: ti: boot: Use ttyS2 instead of ttyO2Sam Protsenko
ttyO2 console enables legacy CONFIG_SERIAL_OMAP driver in kernel. Nowadays it's preferred to use the generic CONFIG_SERIAL_8250_OMAP driver, which being enabled via ttyS2 console. Both drivers are enabled in multi_v7_defconfig and in omap2plus_defconfig, for compatibility reasons. Let's switch to ttyS2 console, to be sure that standard 8250 serial driver is used. Similar behavior can be also achieved by enabling CONFIG_SERIAL_8250_OMAP_TTYO_FIXUP option in kernel, but it's better not to rely on that, as it can be disabled or removed after transitional period. Right now on DRA7/AM57x platforms the 8250-omap driver is being probed first, and omap-serial driver is only probed if the first one failed. It can be seen from uart3 definition in arch/arm/boot/dts/dra7-l4.dtsi: compatible = "ti,dra742-uart", "ti,omap4-uart"; So the kernel already uses 8250 driver. This change basically allows kernel developers to throw away the omap-serial driver and associated compatibility options. Similar discussions [1,2] have started several years ago, so it should be safe to do that now. [1] https://patchwork.kernel.org/patch/6198471/ [2] http://processors.wiki.ti.com/index.php/Sitara_Linux_UART_-_Switching_to_8250_Driver Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org> Reviewed-by: Andrew F. Davis <afd@ti.com> [trini: Update omap5_uevm] Signed-off-by: Tom Rini <trini@konsulko.com>
2019-07-27arm: am57xx: Allow bootm to load larger kernelsSam Protsenko
linux-mainline with multi_v7_defconfig + Android configs takes more space than regular TI Android kernel and bootm will fail to load it. Let's increase max kernel size up to 64 MiB to make it possible to run such kernel. Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org> Reviewed-by: Igor Opaniuk <igor.opaniuk@gmail.com> Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com>
2019-07-27ARM: da850-evm: Remove dead/unneeded codeAdam Ford
The DA8850-evm supports DM_I2C and boots with SPL_DM, so we can drop some of the code which disables DM_I2C in SPL. This patch removes some #undef's now rendered obsolete. Signed-off-by: Adam Ford <aford173@gmail.com>
2019-07-27ARM: da850evm: Remove legacy OHCI referencs and unify platformAdam Ford
OHCI was added with DM_USB support, so there are a few unneeded items in the header file that can be removed. This also unifies da850evm with NOR and NAND booting options so all have OHCI support. Signed-off-by: Adam Ford <aford173@gmail.com> [trini: Migrate da850_am18xxevm] Signed-off-by: Tom Rini <trini@konsulko.com>
2019-07-27ARM: am3517_evm: Fix pin muxing to enable EHCI Host in the futureAdam Ford
This patch enables the pinmuxing to support gpio_57 for phy reset and fixes the pinmuxing for the ECHI tranceiver. The clocks don't appear to by fully enabled yet, so OMAP-EHCI on am3517 is still not yet working, but we're one step closer. Signed-off-by: Adam Ford <aford173@gmail.com>
2019-07-27ARM: omap3_logic: Enable OMAP EHCI support for SOM-LV BoardsAdam Ford
The SOM-LV boards support the OMAP EHCI driver using port 2. With the driver updated to support device tree, this patch sets the corresponding pin muxing for the tranceiver as well as the reset pin. Signed-off-by: Adam Ford <aford173@gmail.com>
2019-07-27Merge tag 'u-boot-imx-20190719' of ↵Tom Rini
https://gitlab.denx.de/u-boot/custodians/u-boot-imx u-boot-imx-20190719 - CCF for i.MX6 - nandbcb command to write SPL into NAND - Switch to DM (i.MX28) - Boards: Toradex, engicam, DH - Fixes for i.MX8 - Fixes for i.MX7ULP Travis: https://travis-ci.org/sbabic/u-boot-imx/builds/561147504
2019-07-26dt-bindings: pinctrl: k3: Introduce pinmux definitions for J721ELokesh Vutla
Add pinctrl macros for J721E SoC. These macro definitions are similar to that of AM6, but adding new definitions to avoid any naming confusions in the soc dts files. Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com> Signed-off-by: Andreas Dannenberg <dannenberg@ti.com>
2019-07-26board: ti: j721e: Add board support for j721e evmLokesh Vutla
Add board specific initialization for j721e evm Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com> Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com> Signed-off-by: Andreas Dannenberg <dannenberg@ti.com>
2019-07-26dt-bindings: ti_sci_pm_domains: Add support for exclusive and shared accessLokesh Vutla
TISCI protocol supports for enabling the device either with exclusive permissions for the requesting host or with sharing across the hosts. There are certain devices which are exclusive to Linux context and there are certain devices that are shared across different host contexts. So add support for getting this information from DT by increasing the power-domain cells to 2. Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
2019-07-26power-domain: Add private data to power domainLokesh Vutla
Certain drivers want to attach private data corresponding to each power domain. This data might be specific be to the drvier. So add a priv entry into the power_domain structure. Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
2019-07-26firmware: ti_sci: Add a command for releasing all exclusive devicesLokesh Vutla
Any host while requesting for a device can request for its exclusive access. If an exclusive permission is obtained then it is the host's responsibility to release the device before the software entity on the host completes its execution. Else any other host's request for the device will be nacked. So add a command that releases all the exclusive devices that is acquired by the current host. This should be used with utmost care and can be called only at the end of the execution. Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
2019-07-26firmware: ti_sci: Add processor shutdown API methodAndreas Dannenberg
Add and expose a new processor shutdown API that wraps the two TISCI messages involved in initiating a core shutdown. The API will first queue a message to have the DMSC wait for a certain processor boot status to happen followed by a message to trigger the actual shutdown- with both messages being sent without waiting or requesting for a response. Note that the processor shutdown API call will need to be followed up by user software placing the respective core into either WFE or WFI mode. Signed-off-by: Andreas Dannenberg <dannenberg@ti.com>
2019-07-26firmware: ti_sci: Allow for device shared and exclusive requestsLokesh Vutla
Sysfw provides an option for requesting exclusive access for a device using the flags MSG_FLAG_DEVICE_EXCLUSIVE. If this flag is not used, the device is meant to be shared across hosts. Once a device is requested from a host with this flag set, any request to this device from a different host will be nacked by sysfw. Current tisci driver enables this flag for every device requests. But this may not be true for all the devices. So provide a separate commands in driver for exclusive and shared device requests. Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
2019-07-26rockchip: add CONFIG_IRAM_BASE for all SoCsKever Yang
Rockchip SoCs have internal sram for bootrom data area and for sdram init program space. Introduce the base address in case we need to use it. Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
2019-07-26rockchip: remove redundant CONFIG_SYS_NS16550_MEM32Kever Yang
The CONFIG_SYS_NS16550_MEM32 already defined in rockchip_common.h, no need to define again in soc level header. Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
2019-07-26include: configs: Increase CONFIG_SYS_BOOTM_LEN to 16MBShyam Saini
The default value of CONFIG_SYS_BOOTM_LEN is 0x800000 i.e, 8MB which causes board reset because of larger uImage size. This was tested on rk3288 Amarula Vyasa and rk3288 Asus Tinker boards. Error log snippet: Booting using the fdt blob at 0x1f00000 Loading Kernel Image ... Image too large: increase CONFIG_SYS_BOOTM_LEN Must RESET board to recover resetting ... Reviewed-by: Jagan Teki <jagan@amarulasolutions.com> Signed-off-by: Shyam Saini <shyam.saini@amarulasolutions.com> Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
2019-07-25Merge https://gitlab.denx.de/u-boot/custodians/u-boot-netTom Rini
- DaVinci emac DM work - NXP driver work - macb updates for RISC-V
2019-07-25net: davinci_emac: convert to using the driver modelBartosz Golaszewski
Now that we removed all legacy boards selecting TI_EMAC we can completely convert the driver code to using the driver model. This patch also updates all remaining users of davinci_emac. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Tested-by: Adam Ford <aford173@gmail.com> #am3517-evm & da850-evm Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
2019-07-25riscv: sifive: fu540: Sync-up config header with RISC-V QEMU supportAnup Patel
We typically use same set of distro images (yocto, debian, fedora, etc.) on both QEMU RISC-V virt machine and SiFive Unleashed board. With growing kernel and ramdisk images, we need to re-adjust default U-Boot environment variables. The config header for QEMU RISC-V virt machine has been already updated to handle bigger kernel and ramdisk images hence this patch updates SiFive FU540 config header accordingly. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Joe Hershberger <joe.hershberger@ni.com> Reviewed-by: David Abdurachmanov <david.abdurachmanov@sifive.com> Tested-by: David Abdurachmanov <david.abdurachmanov@sifive.com>
2019-07-25Add support for the NXP LS1021A-TSN boardJianchao Wang
The LS1021A-TSN is a development board built by VVDN/Argonboards in partnership with NXP. It features the LS1021A SoC and the first-generation SJA1105T Ethernet switch for prototyping implementations of a subset of IEEE 802.1 TSN standards. Supported boot media: microSD card (via SPL), QSPI flash. Rev. A of the board uses a Spansion S25FL512S_256K serial flash, which is 64 MB in size and has an erase sector size of 256KB (therefore, flashing the RCW would erase part of U-Boot). Rev. B and C of the board use a Spansion S25FL256S1 serial flash, which is only 32 MB in size but has an erase sector size of 64KB (therefore the RCW image can be flashed without erasing U-Boot). To avoid the problems above, the U-Boot base address has been selected at 0x100000 (the start of the 5th 256KB erase sector), which works for all board revisions. Actually 0x40000 would have been enough, but 0x100000 is common for all Layerscape devices. eTSEC3 is connecting directly to SJA1105 via an RGMII fixed-link, but SJA1105 is currently not supported by uboot. Therefore, eTSEC3 is disabled. Signed-off-by: Xiaoliang Yang <xiaoliang.yang_1@nxp.com> Signed-off-by: Mingkai Hu <mingkai.hu@nxp.com> Signed-off-by: Jianchao Wang <jianchao.wang@nxp.com> Signed-off-by: Changming Huang <jerry.huang@nxp.com> Signed-off-by: Vladimir Oltean <olteanv@gmail.com> [Vladimir] Code taken from https://github.com/openil/u-boot (which itself is mostly copied from ls1021a-iot) and adapted with the following changes: - Add a008850 errata workaround - Converted eTSEC, MMC to DM to avoid all build warnings - Plugged in distro boot feature, including support for extlinux.conf - Added defconfig for QSPI boot - Added the board/freescale/ls1021atsn/README.rst for initial setup - Increased CONFIG_SYS_MONITOR_LEN so that the SPL malloc pool does not get overwritten during copying of the u-boot.bin payload from MMC to DDR. Acked-by: Joe Hershberger <joe.hershberger@ni.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2019-07-25configs: ls1021atwr: Fix distro_bootcmd for QSPI bootVladimir Oltean
Due to a typo, "run qspi_bootcmd" and "env exists secureboot" got concatenated instead of being separated by a semicolon. Signed-off-by: Vladimir Oltean <olteanv@gmail.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Acked-by: Joe Hershberger <joe.hershberger@ni.com>
2019-07-25arm: ls1021atwr: Convert to use driver model TSEC driverBin Meng
Now that we have added driver model support to the TSEC driver, convert ls1021atwr board to use it. This depends on previous DM series for ls1021atwr: http://patchwork.ozlabs.org/patch/561855/ Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Signed-off-by: Vladimir Oltean <olteanv@gmail.com> Acked-by: Joe Hershberger <joe.hershberger@ni.com> [Vladimir] Made the following changes: - Added 'status = "disabled";' for all Ethernet ports in ls1021a.dtsi - Fixed the confusion between the SGMII/TBI PCS for enet0 and enet1 - a mistake ported over from Linux. Each SGMII PCS lies on the private MDIO bus of the interface (and the RGMII enet2 has no SGMII PCS). - Added CONFIG_DM_ETH to all ls1021atwr_* defconfigs - Completely removed non-DM_ETH support from ls1021atwr - Changed "compatible" string from "fsl,tsec-mdio" to "fsl,etsec2-mdio" and from "fsl,tsec" to "fsl,etsec2" to match Linux
2019-07-25net: tsec: Fix offset of MDIO registers for DM_ETHVladimir Oltean
By convention, the eTSEC MDIO controller nodes are defined in DT at 0x2d24000 and 0x2d50000, but actually U-Boot does not touch the interrupt portion of the register map (MDIO_IEVENTM, MDIO_IMASKM, MDIO_EMAPM). That leaves only the MDIO bus registers (MDIO_MIIMCFG, MDIO_MIIMCOM, MDIO_MIIMADD, MDIO_MIIMADD, MDIO_MIIMCON, MDIO_MIIMSTAT) which start at the 0x520 offset. So shift the DT-defined register map by the offset of MDIO_MIIMCFG when mapping the MDIO bus registers. Signed-off-by: Vladimir Oltean <olteanv@gmail.com> Acked-by: Joe Hershberger <joe.hershberger@ni.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2019-07-25include: configs: ls1028a: set SYS_RX_ETH_BUFFER to 8Alex Marginean
LS1028A ethernet interfaces work with at least 8 BDs, set number of buffers to match that. Signed-off-by: Alex Marginean <alexm.osslist@gmail.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Acked-by: Joe Hershberger <joe.hershberger@ni.com>
2019-07-24Merge tag 'dm-pull-24jul19-take3' of ↵Tom Rini
https://gitlab.denx.de/u-boot/custodians/u-boot-dm Minor driver-model fixes and tweaks A few device-tree fixes Binman support for extracting files from an image
2019-07-24dm: uclass: fix comment copy/paste errorBaruch Siach
The uclass_next_device() routine continues a previously started device iteration. Change the description that is copied from uclass_first_device(). Signed-off-by: Baruch Siach <baruch@tkos.co.il> Reviewed-by: Simon Glass <sjg@chromium.org>
2019-07-24dm: Fix parameter description of dev_read_name()Bin Meng
The comments of dev_read_name() wrongly describe "node" as its parameter. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2019-07-24distro_bootcmd: refactor virtio to support PCI block devicesDavid Abdurachmanov
Starting libvirt v5.3.0 with QEMU 4.0.0 use of PCI is automatic and thus storage is connected via PCI, which is not visible to U-Boot out-of-the-box. Refactor to do "pci enum" followed by "virtio scan" to see PCI connected storage, and allow bootloader to load kernel and initramfs images. Tested with Fedora/RISCV using releases: libvirt 5.4.0 & 5.5.0, QEMU 4.0.0 and U-Boot 2019.07 RC4. Signed-off-by: David Abdurachmanov <david.abdurachmanov@sifive.com>
2019-07-24remoteproc: Fix potential build issues with SPL remoteprocSuman Anna
The rproc uclass driver can either be built with SPL_REMOTEPROC or REMOTEPROC, but the function prototypes in remoteproc.h are defined only when CONFIG_REMOTEPROC is defined. This can cause build issues in SPL if CONFIG_REMOTEPROC is not selected. Fix this by replacing the existing precompiler macro usage with CONFIG_IS_ENABLED. Fixes: ddf56bc7e3ef ("drivers: Introduce a simplified remoteproc framework") Signed-off-by: Suman Anna <s-anna@ti.com> Reviewed-by: Nishanth Menon <nm@ti.com> Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com>
2019-07-24env: am57xx: Implement A/B boot processRuslan Trofymenko
Add support for A/B boot process on AM57xx based boards: 1. Define 'slot_suffix' variable (using 'ab_select' command) 2. Extend 'emmc_android_boot' boot command (add commands for A/B boot process) 'ab_select' command is used to decide which slot should be used for booting up. A/B metadata resides in 'misc' partition. To activate the A/B boot process, the following config options must be set: CONFIG_ANDROID_AB=y CONFIG_CMD_AB_SELECT=y For successful A/B boot, the corresponding A/B infrastructure must be involved on Android side [1] (including mounting system as root), and disk must be partitioned accordingly. When A/B boot is enabled, there are some known limitations currently exist (not related to A/B patches, need to be implemented later): 1. The 'Verified Boot' sequence is not supported 2. dev path to system partition (system_a or system_b) is passed via 'bootargs' as 'root=' argument like 'root=/dev/mmcblk1p12', but further we'll need to rework it with respect to dm-verity requirements [2] In case when A/B partitions are not present in system (and A/B boot is enabled), boot up process will be terminated and next message will be shown: "boot_a(b) partition not found" [1] https://source.android.com/devices/tech/ota/ab [2] https://source.android.com/devices/tech/ota/ab/ab_implement#kernel Signed-off-by: Ruslan Trofymenko <ruslan.trofymenko@linaro.org> Signed-off-by: Igor Opaniuk <igor.opaniuk@gmail.com> Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org> Reviewed-by: Alistair Strachan <astrachan@google.com> Reviewed-by: Sam Protsenko <semen.protsenko@linaro.org> Reviewed-by: Simon Glass <sjg@chromium.org>