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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>
2019-07-25Merge 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>
2019-07-24common: Implement A/B metadataRuslan Trofymenko
This patch determines the A/B-specific bootloader message structure that is the basis for implementation of recovery and A/B update functions. A/B metadata is stored in this structure and used to decide which slot should we use to boot the device. Also some basic functions for A/B metadata manipulation are implemented (like slot selection). The patch was extracted from commits [1], [2] with some coding style fixes. [1] https://android-review.googlesource.com/c/platform/external/u-boot/+/729878/2 [2] https://android-review.googlesource.com/c/platform/external/u-boot/+/729880/2 Signed-off-by: Ruslan Trofymenko <ruslan.trofymenko@linaro.org> Signed-off-by: Igor Opaniuk <igor.opaniuk@gmail.com> Reviewed-by: Sam Protsenko <semen.protsenko@linaro.org> Reviewed-by: Simon Glass <sjg@chromium.org>
2019-07-24disk: part: Extend API to get partition infoRuslan Trofymenko
This patch adds part_get_info_by_dev_and_name_or_num() function which allows us to get partition info from its number or name. Partition of interest is specified by string like "device_num:partition_number" or "device_num#partition_name". The patch was extracted from [1]. [1] https://android-review.googlesource.com/c/platform/external/u-boot/+/729880/2 Signed-off-by: Ruslan Trofymenko <ruslan.trofymenko@linaro.org> Signed-off-by: Igor Opaniuk <igor.opaniuk@gmail.com> Reviewed-by: Alistair Strachan <astrachan@google.com> Reviewed-by: Sam Protsenko <semen.protsenko@linaro.org> Reviewed-by: Simon Glass <sjg@chromium.org>
2019-07-23cbfs: Rename checksum to attributes_offsetSimon Glass
It seems that this field has been renamed in later version of coreboot. Update it. Signed-off-by: Simon Glass <sjg@chromium.org>
2019-07-23cbfs: Add an enum and comment for the magic numberSimon Glass
This field is not commented in the original file. Add a comment. Signed-off-by: Simon Glass <sjg@chromium.org>
2019-07-23Merge tag 'efi-2019-10-rc1-2' of ↵Tom Rini
https://gitlab.denx.de/u-boot/custodians/u-boot-efi Pull request for UEFI sub-system for v2019.10-rc1 (2) * Implement the EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE event. * Address errors of type -Werror=address-of-packed-member when building with GCC9.1 * Fix an error when adding memory add addres 0x00000000. * Rework some code comments for Sphinx compliance.
2019-07-23Merge tag 'u-boot-stm32-20190723' of ↵Tom Rini
https://gitlab.denx.de/u-boot/custodians/u-boot-stm - add rtc driver for stm32mp1 - add remoteproc driver for stm32mp1 - use kernel qspi compatible string for stm32
2019-07-22remoteproc: add elf file load supportFabien Dessenne
The current implementation supports only binary file load. Add helpers to support ELF32 format (sanity check, and load). Note that since an ELF32 image is built for the remote processor, the load function uses the device_to_virt ops to translate the addresses. Implement a basic translation for sandbox_testproc. Add related tests. Test result: => ut dm remoteproc_elf Test: dm_test_remoteproc_elf: remoteproc.c Test: dm_test_remoteproc_elf: remoteproc.c (flat tree) Failures: 0 Signed-off-by: Loic Pallardy <loic.pallardy@st.com> Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com> Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com>
2019-07-22remoteproc: add device_to_virt opsFabien Dessenne
Introduce the device_to_virt function to allow translation between device address (remote processor view) and virtual address (main processor view). Signed-off-by: Loic Pallardy <loic.pallardy@st.com> Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com> Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com>
2019-07-22remoteproc: fix function headersFabien Dessenne
Add full function comment headers. Fix rproc_is_initialized() return value description. Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com> Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com>
2019-07-22dm: core: Introduce xxx_translate_dma_address()Fabien Dessenne
Add the following functions to translate DMA address to CPU address: - dev_translate_dma_address() - ofnode_translate_dma_address() - of_translate_dma_address() - fdt_translate_dma_address() These functions work the same way as xxx_translate_address(), with the difference that the translation relies on the "dma-ranges" property instead of the "ranges" property. Add related test. Test report: => ut dm fdt_translation Test: dm_test_fdt_translation: test-fdt.c Test: dm_test_fdt_translation: test-fdt.c (flat tree) Failures: 0 Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
2019-07-21Merge tag 'rockchip-for-v2019.07' of ↵Tom Rini
https://gitlab.denx.de/u-boot/custodians/u-boot-rockchip - rk3399 lpddr4 support - rk3399-rock960 board support improvement - Eliminate pyelftools dependency by make_fit_atf.py - clean up rockchip dts to use -u-boot.dtsi - use ARM arch/generic timer instead of rk_timer - clean up Kconfig options for board support
2019-07-20rockchip: rk3399: use common secure_timer_init() for spl/tplKever Yang
SPL/TPL share the same secure_timer_init(), update to use one copy source code and update to use CONFIG_ROCKCHIP_STIMER_BASE as base address and rename to function name to rockchip_stimer_init(). Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
2019-07-20rockchip: rk3368: enable stimer for rk3368Kever Yang
Add stimer_init() for spl/tpl so that we able to switch to use arch timer. Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
2019-07-20rockchip: rk3128: use ARM arch timer instead of rk_timerKever Yang
We prefer to use ARM arch timer instead of rockchip timer, so that we are using the same timer for SPL, U-Boot and Kernel, which will make things simple and easy to track to boot time. Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
2019-07-20rockchip: rk3288: use ARM arch timer instead of rk_timerKever Yang
We prefer to use ARM arch timer instead of rockchip timer, so that we are using the same timer for SPL, U-Boot and Kernel, which will make things simple and easy to track to boot time. Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
2019-07-20rockchip: rk3036: use ARM arch timer instead of rk_timerKever Yang
We prefer to use ARM arch timer instead of rockchip timer, so that we are using the same timer for SPL, U-Boot and Kernel, which will make things simple and easy to track the boot time. Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
2019-07-20rockchip: rk322x: use ARM arch timer instead of rk_timerKever Yang
We prefer to use ARM arch timer instead of rockchip timer, so that we are using the same timer for SPL, U-Boot and Kernel, which will make things simple and easy to track to boot time. Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
2019-07-20rockchip: rk3288: update u-boot raw image size for all boardsKever Yang
Some rk3288 boards are using raw image of u-boot.bin, and now it's much bigger than default 200KB, update CONFIG_SYS_MONITOR_LEN to 600KB. Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
2019-07-19Merge https://gitlab.denx.de/u-boot/custodians/u-boot-riscvTom Rini
- Update SiFive Unleashed clock driver. - Enables SiFive SPI driver and MMC SPI driver for SiFive Unleashed board
2019-07-19clk: sifive: Sync-up DT bindings header with upstream LinuxAnup Patel
The location and license header of DT bindings header for SiFive clock driver has changed in upstream Linux hence this patch. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2019-07-19clk: sifive: Sync-up WRPLL library with upstream LinuxAnup Patel
Now that SiFive clock driver is merged in upstream Linux, we sync-up WRPLL library used by SiFive clock driver with upstream Linux sources. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2019-07-19clk: sifive: Factor-out PLL library as separate moduleAnup Patel
To match SiFive clock driver with latest Linux, we factor-out PLL library as separate module under drivers/clk/analogbits. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2019-07-19debug_uart: Add printdecJagan Teki
Add printdec, this would help to print an output a decimalism value. Signed-off-by: Jagan Teki <jagan@amarulasolutions.com> Signed-off-by: YouMin Chen <cym@rock-chips.com> Reviewed-by: Kever Yang <Kever.yang@rock-chips.com>
2019-07-18Merge branch 'master' of git://git.denx.de/u-boot-netTom Rini
2019-07-18net: unaligned copying of unsigned longHeinrich Schuchardt
The inline functions net_read_u32() and net_copy_u32() have been created to copy unaligned u32. But this is not obvious to the compiler. GCC 9.1 introduces a check -Werror=address-of-packed-member which leads to a build error on Travis CI: net/bootp.c: In function ‘dhcp_send_request_packet’: net/bootp.c:1011:27: error: taking address of packed member of ‘struct bootp_hdr’ may result in an unaligned pointer value [-Werror=address-of-packed-member] 1011 | net_copy_u32(&bp->bp_id, &bp_offer->bp_id); Change the type of the function parameters to void * to avoid the build error. Reported-by: Ramon Fried <rfried.dev@gmail.com> Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Acked-by: Joe Hershberger <joe.hershberger@ni.com>
2019-07-18net: add MDIO_MUX DM classAlex Marginean
Adds a class for MDIO MUXes, which control access to a series of downstream child MDIOs. MDIO MUX drivers are required to implement a select function used to switch between child buses. MUX children are registered as MDIO buses and they can be used just like regular MDIOs. 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>
2019-07-18net: add comments to phy APIsAlex Marginean
Added a comment on the limitations of phy_find_by_mask API when scanning MDIO buses with multiple PHYs present. Added short descriptions to the other APIs in phy.h for consistency. Signed-off-by: Alex Marginean <alexm.osslist@gmail.com> Acked-by: Joe Hershberger <joe.hershberger@ni.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2019-07-18Merge branch '2019-07-17-master-imports'Tom Rini
- Various FS/disk related fixes with security implications. - Proper fix for the pci_ep test. - Assorted bugfixes - Some MediaTek updates. - 'env erase' support.
2019-07-18power-domain.h: Fix typoAnatolij Gustschin
%s/ot/to/ Signed-off-by: Anatolij Gustschin <agust@denx.de>
2019-07-18arm: qemu: fix failure in flash initialization if booting from TF-AAKASHI Takahiro
If U-Boot is loaded and started from TF-A (you need to change SYS_TEXT_BASE to 0x60000000), it will hang up at flash initialization. If secure mode is off (default, or -machine virt,secure=off) at qemu, it will provide dtb with two flash memory banks: flash@0 { bank-width = <0x4>; reg = <0x0 0x0 0x0 0x4000000 0x0 0x4000000 0x0 0x4000000>; compatible = "cfi-flash"; }; If secure mode is on, on the other hand, qemu provides dtb with 1 bank: flash@0 { bank-width = <0x4>; reg = <0x0 0x4000000 0x0 0x4000000>; compatible = "cfi-flash"; }; As a result, flash_init()/flash_get_size() will eventually fail. With this patch applied, relevant CONFIG values are modified. Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org> Tested-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2019-07-18env: register erase commandFrank Wunderlich
this patch adds basic changes for adding a erase-subcommand to env with this command the environment stored on non-volatile storage written by saveenv can be cleared. Signed-off-by: Frank Wunderlich <frank-w@public-files.de> squashed fixes - start message with "Erasing" - mark erase-function as optional - env: separate eraseenv from saveenv Suggested-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com> Reviewed-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>