The USB_PWR signal operation is not reliable on this DWC3 controller
instance in case the signal is active high. Switch to GPIO control,
which always behaves correctly. Perform the change in u-boot extras
until this hits Linux upstream.
Signed-off-by: Marek Vasut <marex@denx.de>
Starting with PCB revision 3 we can safely make use of higher RAM
frequency again. Make use of the EEPROM detection to determine the
revision and use the updated RAM timings for new SoMs.
Signed-off-by: Teresa Remmet <t.remmet@phytec.de>
Reviewed-by: Yannic Moog <y.moog@phytec.de>
Tested-by: Yannic Moog <y.moog@phytec.de>
Add EEPROM detection initialisation for phyCORE-i.MX8MM and
print SoM information during boot when successful.
Signed-off-by: Teresa Remmet <t.remmet@phytec.de>
Reviewed-by: Yannic Moog <y.moog@phytec.de>
Tested-by: Yannic Moog <y.moog@phytec.de>
Add helper function to read out the PCB revision of a PHYTEC SoM.
Signed-off-by: Teresa Remmet <t.remmet@phytec.de>
Reviewed-by: Yannic Moog <y.moog@phytec.de>
Tested-by: Yannic Moog <y.moog@phytec.de>
Due to PCB layout constraints in PCB revisions until including 1549.2,
a RAM frequency of 2 GHz can cause rare instabilities. Set the RAM
frequency to 1.5 GHz to achieve a stable system under all conditions.
Signed-off-by: Teresa Remmet <t.remmet@phytec.de>
Reviewed-by: Yannic Moog <y.moog@phytec.de>
Tested-by: Yannic Moog <y.moog@phytec.de>
Add imx8m specific detection part. Which includes checking the
EEPROM data for article number options.
Signed-off-by: Teresa Remmet <t.remmet@phytec.de>
Reviewed-by: Yannic Moog <y.moog@phytec.de>
Tested-by: Yannic Moog <y.moog@phytec.de>
Recent shipped PHYTEC SoMs come with an i2c EEPROM containing
information about the hardware such as board revision and variant.
This can be used for RAM detection and loading device tree overlays
during kernel start.
Signed-off-by: Teresa Remmet <t.remmet@phytec.de>
Reviewed-by: Yannic Moog <y.moog@phytec.de>
Tested-by: Yannic Moog <y.moog@phytec.de>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
The bootcmd_mfg env variable is legacy from IMX downstream u-boot branch
and is not needed on mainline.
Signed-off-by: Joao Paulo Goncalves <joao.goncalves@toradex.com>
Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Acked-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
When using a list of writeable variables, the initial values come
from the built-in default environment since commit 5ab8105836 ("env:
Complete generic support for writable list").
Remove unnecessary misuse of CONFIG_ENV_IS_NOWHERE as default environment.
Based on the fix done by commit b16fd7f75f ("imx6q: acc: Remove misuse
of env is nowhere driver").
Signed-off-by: Eduard Strehlau <eduard@lionizers.com>
Signed-off-by: Fabio Estevam <festevam@denx.de>
Since commit 4fcba5d556 ("regulator: implement basic reference
counter") the return value of regulator_set_enable() may be EALREADY or
EBUSY for fixed/GPIO regulators.
Switch to using the more relaxed regulator_set_enable_if_allowed() to
continue if regulator already was enabled or disabled.
This fixes the following error when running the 'ums' command:
=> ums 0 mmc 0
UMS: LUN 0, dev mmc 0, hwpart 0, sector 0x0, count 0xece000
Error enabling VBUS supply
g_dnl_register: failed!, error: -114
g_dnl_register failed
Signed-off-by: Fabio Estevam <festevam@denx.de>
Reviewed-by: Marek Vasut <marex@denx.de>
Use dev_ofnode() to retrieve the USB node pointer from the udevice
structure.
This fixes the following build error:
drivers/usb/host/ehci-mxs.c:143:38: error: 'struct udevice' has no member named 'node_'
Signed-off-by: Fabio Estevam <festevam@denx.de>
Reviewed-by: Marek Vasut <marex@denx.de>
Extend the padding process of u-boot-nand.imx target by adding 10k bytes
of zeros to the end of the binary using the 'dd' command.
The existing padding method did not generate a functional binary,
as discussed in more detail in this thread [1]. Instead, we adopt the
end-padding calculation method documented in 'board/doc/colibri_imx7.rst'
as a reference, which is relevant for iMX7 with NAND storage.
Adding 10k bytes of zeros provides an approximate value that makes the
proper padding for these NAND devices.
[1] https://lore.kernel.org/all/CAC4tdFUqffQzRQFv5AGe_xtbFy1agr2SEpn_FzEdexhwjdryyw@mail.gmail.com/
Signed-off-by: Hiago De Franco <hiago.franco@toradex.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Add detection of eMMC vs NAND devices on the Colibri iMX7
board. A GPIO is configured to detect the presence of an on-board resistor
that is configured differently based on the flash memory used. Depending on
the detection result, the 'variant' environment variable is set to '-emmc'
or cleared, indicating the type of storage device.
This enhancement improves variant detection during system initialization
through USB recovery mode, where U-Boot is loaded directly to RAM. This
allows variant detection for an accurate device tree selection.
Signed-off-by: Hiago De Franco <hiago.franco@toradex.com>
Acked-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Update lpddr4 configuration and training using updated spreadsheet and
tools from NXP using data from previous spreadsheet and verified
toward datasheet:
- MX8M_Mini_LPDDR4_RPA_v22.xlsx
- mscale_ddr_tool_v3.31_setup.exe
The most relevant update is related to errata ERR050805:
"DRAM: Controller automatic derating logic may not work when
the LPDDR4 memory temperature is above 85 °C at initialization"
Other relevant fixes:
- DRAMTMG7 register: corrected calculation of T_CKPDX parameter
(equal to tCKCKEH for LPDDR4)
- RANKCTL register: corrected calculations for ODTLon and ODTLoff
to follow the JEDEC specification
- ADDRMAP7 register: added support for 17-row devices
As per errata ERR050805:
An issue exists with the automatic derating logic of the DDR
controller that only samples the LPDDR4 MR4 register when the
Temperature Update Flag (TUF) field (MR4[7] ) is 1’b1. If the
LPDDR4 memory is initialized and starts operation above 85 °C
(MR4[2:0] > 3’b011), the MR4 Temperature Update Flag (TUF) will
not be set. The DDR Controller will therefore not automatically
adjust the memory refresh rate or de-rate memory timings based
on the LPDDR4 memory temperature. This may cause the controller
incorrectly setting the refresh period, potentially cause the
LPDDR4 memory losing data contents and lead to possible data
integrity issues above 85 °C.
Errata provides three possible workaround options, while option 2
is the most reasonable:
Disable the automatic derating logic of the DDR controller and
apply fixed x2 refresh rate (0.5x refresh). This option is
suitable for designs that are expected to boot at or above 85 °C
and memory’s MR4[2:0] (Refresh Rate) DOES NOT report the following
conditions:
3b101: 0.25x refresh, no de-rating
3b110: 0.25x refresh, with de-rating
3b111: SDRAM High temperature operating limit exceeded
[1]: https://www.nxp.com/docs/en/errata/IMX8MM_0N87W.pdf
Signed-off-by: Andrejs Cainikovs <andrejs.cainikovs@toradex.com>
Acked-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Use DM_I2C and DM_SERIAL as it is now mandatory.
Signed-off-by: Andrej Rosano <andrej.rosano@withsecure.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
When built with CONFIG_IMX_HAB, the full FIT image, including stuff
tacked on beyond the end of the fdt structure, is expected to be (fdt
size rounded up to 0x1000 boundary)+CONFIG_CSF_SIZE.
Now, when the FIT image is loaded from a storage device, it doesn't
really matter that the flash.bin that gets written to target isn't
quite that big - we will just load some garbage bytes that are never
read or used for anything. But when flash.bin is uploaded via uuu,
it's important that we actually serve at least as many bytes as the
target expects, or we will hang in rom_api_download_image().
Extend the logic in the csf.sh script so that the csf blob is padded
to CONFIG_CSF_SIZE minus the size of the IVT header.
Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Reviewed-by: Fabio Estevam <festevam@denx.de>
Reviewed-by: Marek Vasut <marex@denx.de>
These IS_ENABLED(CONFIG_SPL_LOAD_FIT) cases can no longer be reached,
and thus get_fit_image_size() is also redundant.
Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Reviewed-by: Fabio Estevam <festevam@denx.de>
Currently, spl_imx_romapi uses a somewhat tricky workaround for the
fact that a FIT image with external data doesn't directly allow one to
know the full size of the file: It does a dummy spl_load_simple_fit(),
having the ->read callback remember the largest offset requested, and
then does a last call to rom_api_download_image() to fetch the
remaining part of the full FIT image.
We can avoid that by just keeping track of how much we have downloaded
already, and if the ->read() requests something outside the current
valid buffer, fetch up to the end of the current request.
The current method also suffers from not working when CONFIG_IMX_HAB
is enabled: While in that case u-boot.itb is not built with external
data, so the fdt header does contain the full size of the dtb
structure. However, it does not account for the extra CONFIG_CSF_SIZE
added by board_spl_fit_size_align(). And also, the data it hands out
during the first dummy spl_load_simple_fit() is of course garbage, and
wouldn't pass the verification.
So we really need to call spl_load_simple_fit() only once, let that
figure out just how big the FIT image is (including whatever data, CSF
or "ordinary" external data, has been tacked on beyond the fdt
structure), and always provide valid data from the ->read callback.
This only affects the CONFIG_SPL_LOAD_FIT case - I don't have any
hardware or experience with the CONFIG_SPL_LOAD_IMX_CONTAINER case, so
I leave that alone for now.
Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Reviewed-by: Fabio Estevam <festevam@denx.de>
The hab signing script doc/imx/habv4/csf_examples/mx8m/csf.sh does
fdtget -t x u-boot.dtb /binman/imx-boot/uboot offset
to figure out the offset of u-boot.itb inside flash.bin. That works
fine for imx8mm, imx8mn, imx8mq, but fails for imx8mp because in that
case 'uboot' is merely a label and not actually the node name.
Homogenize these cases and make imx8mp the same as the other imx8m*
variants. The binman type is explicitly given and no longer derived
from the node name, and the csf.sh script will work for all four SOCs.
Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Reviewed-by: Marek Vasut <marex@denx.de>
Reviewed-by: Fabio Estevam <festevam@denx.de>
Drop unused code related to CONFIG_TDX_EASY_INSTALLER, that existed only on
toradex downstream branch.
Signed-off-by: Hiago De Franco <hiago.franco@toradex.com>
Reviewed-by: Fabio Estevam <festevam@denx.de>
The SPL authenticates image starting from CONFIG_SPL_LOAD_FIT_ADDRESS
address, update the csf_fit.txt to match.
Signed-off-by: Marek Vasut <marex@denx.de>
Reviewed-by: Fabio Estevam <festevam@denx.de>
If optee is detected configure it in the Linux device-tree:
- add /firmware/optee node
- add /reserved-memory nodes for optee_core and optee_shm
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Move the crypto and sec_jr* nodes from board-specific
u-boot.dtsi files into the common files. Additionally protect the
nodes with ifdef CONFIG_FSL_CAAM as they don't serve any purpose if
that is not enabled.
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Reviewed-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
There is no need to include the firmware/optee node if the optee
driver is not enabled.
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Reviewed-by: Fabio Estevam <festevam@denx.de>
Move the firmware/optee node to the common imx8mp-u-boot.dtsi and
protect it with an ifdef CONFIG_OPTEE as it is a meaningless node
without the optee driver enabled.
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Reviewed-by: Fabio Estevam <festevam@denx.de>
Move the firmware/optee node to the common imx8mm-u-boot.dtsi and
protect it with an ifdef CONFIG_OPTEE as it is a meaningless node
without the optee driver enabled.
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Reviewed-by: Fabio Estevam <festevam@denx.de>
Reviewed-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Enable USB SDP SPL aka serial downloader recovery mode support.
While at it also enable fastboot support which may be used to
subsequently load further stages like a Toradex Easy Installer FIT
image.
Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Reviewed-by: Fabio Estevam <festevam@denx.de>
Update the imx8mp-venice-gw74xx for revB:
- add CAN1
- add TIS-TPM on SPI2
- add FAN controller
- fix PMIC I2C bus (revA PMIC I2C was non-functional so no need for
backward compatible option)
- M2 socket GPIO's moved
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
The Gateworks imx8mm-venice-gw7905-0x consists of a SOM + baseboard.
The GW700x SOM contains the following:
- i.MX8M Mini SoC
- LPDDR4 memory
- eMMC Boot device
- Gateworks System Controller (GSC) with integrated EEPROM, button
controller, and ADC's
- RGMII PHY
- PMIC
- SOM connector providing:
- FEC GbE MII
- 1x SPI
- 2x I2C
- 4x UART
- 2x USB 2.0
- 1x PCI
- 1x SDIO (4-bit 3.3V)
- 1x SDIO (4-bit 3.3V/1.8V)
- GPIO
The GW7905 Baseboard contains the following:
- GPS
- microSD
- off-board I/O connector with I2C, SPI, GPIO
- EERPOM
- PCIe clock generator
- 1x full-length miniPCIe socket with PCI/USB3 (via mux) and USB2.0
- 1x half-length miniPCIe socket with USB2.0 and USB3.0
- USB 3.0 HUB
- USB Type-C with USB PD Sink capability and peripheral support
- USB Type-C with USB 3.0 host support
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
The Gateworks imx8mp-venice-gw73xx-2x consists of a SOM + baseboard.
The GW702x SOM contains the following:
- i.MX8M Plus SoC
- LPDDR4 memory
- eMMC Boot device
- Gateworks System Controller (GSC) with integrated EEPROM, button
controller, and ADC's
- PMIC
- SOM connector providing:
- eQoS GbE MII
- 1x SPI
- 2x I2C
- 4x UART
- 2x USB 3.0
- 1x PCI
- 1x SDIO (4-bit 3.3V)
- 1x SDIO (4-bit 3.3V/1.8V)
- GPIO
The GW73xx Baseboard contains the following:
- 1x RJ45 GbE (eQoS from SOM)
- 1x RJ45 GbE (PCI)
- off-board I/O connector with MIPI-CSI (3-lane), MIPI-DSI (4-lane),
- off-board I/O connector with RS232/RS485
- off-board I/O connector with SPI
- off-board I/O connector with I2C, UART, and GPIO
I2C, I2S and GPIO
- microSD (1.8V/3.3V)
- GPS
- Accelerometer
- EERPOM
- USB 3.0 Hub
- Front Panel bi-color LED
- re-chargeable battery (for RTC)
- PCIe clock generator
- PCIe switch
- on-board 802.11abgnac 1x1 WiFi and Bluetooth 5.2
- 1x USB Type-A host socket with USB 3.0 support
- 1x USB OTG with USB 2.0 support
- 2x MiniPCIe socket with PCI and USB 2.0
- 1x MiniPCIe socket with SIM, PCI/USB 3.0 (mux), and USB 2.0
- Wide range DC input supply
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
The Gateworks imx8mp-venice-gw72xx-2x consists of a SOM + baseboard.
The GW702x SOM contains the following:
- i.MX8M Plus SoC
- LPDDR4 memory
- eMMC Boot device
- Gateworks System Controller (GSC) with integrated EEPROM, button
controller, and ADC's
- PMIC
- SOM connector providing:
- eQoS GbE MII
- 1x SPI
- 2x I2C
- 4x UART
- 2x USB 3.0
- 1x PCI
- 1x SDIO (4-bit 3.3V)
- 1x SDIO (4-bit 3.3V/1.8V)
- GPIO
The GW72xx Baseboard contains the following:
- 1x RJ45 GbE (eQoS from SOM)
- 1x RJ45 GbE (PCI)
- off-board I/O connector with MIPI-CSI (3-lane), MIPI-DSI (4-lane),
- off-board I/O connector with RS232/RS485
- off-board I/O connector with SPI
- off-board I/O connector with I2C, UART, and GPIO
I2C, I2S and GPIO
- microSD (1.8V/3.3V)
- GPS
- Accelerometer
- EERPOM
- USB 3.0 Hub
- Front Panel bi-color LED
- re-chargeable battery (for RTC)
- PCIe clock generator
- PCIe switch
- 1x USB Type-A host socket with USB 3.0 support
- 1x USB OTG with USB 2.0 support
- 1x MiniPCIe socket with PCI and USB 2.0
- 1x MiniPCIe socket with SIM, PCI/USB 3.0 (mux), and USB 2.0
- Wide range DC input supply
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Linux microPlatform uses an rngb device in optee-os in boot scheme
SPL -> OPTEE -> U-Boot. To make rngb available for optee-os, enable
it in SPL.
Signed-off-by: Ricardo Salveti <ricardo@foundries.io>
Co-developed-by: Oleksandr Suvorov <oleksandr.suvorov@foundries.io>
Signed-off-by: Oleksandr Suvorov <oleksandr.suvorov@foundries.io>
With enabled SKIP_LOWLEVEL_INIT, the weak function timer_init() is
used in the SPL build. For iMX6 SoC, this leads MMC to fail once
u-boot proper is booted due to a timing issue.
Always use iMX-specific timer_init() in SPL to fix timing issues.
Fixes: be277c3a89 ("imx: mx7: avoid some initialization if low level is skipped")
Signed-off-by: Michael Scott <mike@foundries.io>
Co-developed-by: Oleksandr Suvorov <oleksandr.suvorov@foundries.io>
Signed-off-by: Oleksandr Suvorov <oleksandr.suvorov@foundries.io>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
scan all entries in multi-device boot_targets
EFI empty-capsule support
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Merge tag 'dm-pull-13oct23' of https://source.denx.de/u-boot/custodians/u-boot-dm
improvements with dev_read_addr_..._ptr()
scan all entries in multi-device boot_targets
EFI empty-capsule support
- Fix a memset call in the optee_agent code.
Then to quote the author for the rest of the changes:
This patch series allows users to access SCMI base protocol provided by
SCMI server (platform). See SCMI specification document v3.2 beta[1]
for more details about SCMI base protocol.
What is currently not implemented is
- SCMI_BASE_NOTIFY_ERRORS command and notification callback mechanism
This feature won't be very useful in the current U-Boot environment.
[1] https://developer.arm.com/documentation/den0056/e/?lang=en
The sess variable in open_channel was not entirely
cleared to zero at the start of this function.
This commit ensures that the entire struct is cleared.
Signed-off-by: Francois Berder <fberder@outlook.fr>
Now that we have Base protocol support, we will be able to check if a given
protocol is really supported by the SCMI server (firmware).
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Added is a new unit test for SCMI base protocol, which will exercise all
the commands provided by the protocol, except SCMI_BASE_NOTIFY_ERRORS.
$ ut dm scmi_base
It is assumed that test.dtb is used as sandbox's device tree.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
SCMI base protocol is mandatory and doesn't need to be listed in a device
tree.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>
SCMI base protocol is mandatory, and once SCMI node is found in a device
tree, the protocol handle (udevice) is unconditionally installed to
the agent. Then basic information will be retrieved from SCMI server via
the protocol and saved into the agent instance's local storage.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>
Adding SCMI base protocol makes it inconvenient to hold the agent instance
(udevice) locally since the agent device will be re-created per each test.
Just remove it and simplify the test flows.
The test scenario is not changed at all.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>
This is a simple implementation of SCMI base protocol for sandbox.
The main use is in SCMI unit test.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>
In SCMI base protocol version 2 (0x20000), new interfaces,
BASE_SET_DEVICE_PERMISSIONS/BASE_SET_PROTOCOL_PERMISSIONS/
BASE_RESET_AGENT_CONFIGURATION, were added. Moreover, the api of
BASE_DISCOVER_AGENT was changed to support self-agent discovery.
So the driver expects SCMI firmware support version 2 of base protocol.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>
SCMI base protocol is mandatory according to the SCMI specification.
With this patch, SCMI base protocol can be accessed via SCMI transport
layers. All the commands, except SCMI_BASE_NOTIFY_ERRORS, are supported.
This is because U-Boot doesn't support interrupts and the current transport
layers are not able to handle asynchronous messages properly.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>
Any SCMI protocol may have its own channel.
Test this feature on sandbox as the necessary framework was added
in a prior commit.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>
This framework allows SCMI protocols to be installed and bound to the agent
so that the agent can manage and utilize them later.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>
Move the location of scmi_bind_protocols() backward for changes
in later patches.
There is no change in functionality.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>
In sandbox scmi agent, channels are not used at all. But in this patch,
dummy channels are supported in order to test protocol-specific channels.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>
