Commit graph

70824 commits

Author SHA1 Message Date
Li Jun
37e4fc3354 usb: gadget: add WCID support for mfgtool
Enable WCID(Microsoft Compatible ID Feature Descriptor) for mfgtool.

Signed-off-by: Li Jun <jun.li@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
2021-01-31 14:08:56 +01:00
Li Jun
a764c94128 usb: gadget: OS Feature Descriptors support
This is a proting patch from linux kernel: 37a3a533429e
("usb: gadget: OS Feature Descriptors support"), the original commit
log see below:

There is a custom (non-USB IF) extension to the USB standard:

http://msdn.microsoft.com/library/windows/hardware/gg463182

They grant permission to use the specification - there is
"Microsoft OS Descriptor Specification License Agreement"
under the link mentioned above, and its Section 2 "Grant
of License", letter (b) reads:

"Patent license. Microsoft hereby grants to You a nonexclusive,
royalty-free, nontransferable, worldwide license under Microsoft鈥檚
patents embodied solely within the Specification and that are owned
or licensable by Microsoft to make, use, import, offer to sell,
sell and distribute directly or indirectly to Your Licensees Your
Implementation. You may sublicense this patent license to Your
Licensees under the same terms and conditions."

The said extension is maintained by Microsoft for Microsoft.

Yet it is fairly common for various devices to use it, and a
popular proprietary operating system expects devices to provide
"OS descriptors", so Linux-based USB gadgets whishing to be able
to talk to a variety of operating systems should be able to provide
the "OS descriptors".

This patch adds optional support for gadgets whishing to expose
the so called "OS Feature Descriptors", that is "Extended Compatibility ID"
and "Extended Properties".

Hosts which do request "OS descriptors" from gadgets do so during
the enumeration phase and before the configuration is set with
SET_CONFIGURATION. What is more, those hosts never ask for configurations
at indices other than 0. Therefore, gadgets whishing to provide
"OS descriptors" must designate one configuration to be used with
this kind of hosts - this is what os_desc_config is added for in
struct usb_composite_dev. There is an additional advantage to it:
if a gadget provides "OS descriptors" and designates one configuration
to be used with such non-USB-compliant hosts it can invoke
"usb_add_config" in any order because the designated configuration
will be reported to be at index 0 anyway.

This patch also adds handling vendor-specific requests addressed
at device or interface and related to handling "OS descriptors"."

Signed-off-by: Li Jun <jun.li@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
2021-01-31 14:08:56 +01:00
Peng Fan
16fd832e0e usb: gadget: add Kconfig for OS descriptors
Add Kconfig for OS descriptors

Signed-off-by: Peng Fan <peng.fan@nxp.com>
2021-01-31 14:08:56 +01:00
Li Jun
6777483f5d usb: gadget: move utf8_to_utf16le to header file
As other users may use utf8_to_utf16le() to convert the utf8
to utf16 for usb, so move it to head file.

Signed-off-by: Li Jun <jun.li@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
2021-01-31 14:08:56 +01:00
Li Jun
1c7aacb9a8 usb: gadget: OS String support
This is a porting patch from linux kernel: 19824d5eeece
("usb: gadget: OS String support"), original commit log
see below:

"There is a custom (non-USB IF) extension to the USB standard:

http://msdn.microsoft.com/library/windows/hardware/gg463182

They grant permission to use the specification - there is
"Microsoft OS Descriptor Specification License Agreement"
under the link mentioned above, and its Section 2 "Grant
of License", letter (b) reads:

"Patent license. Microsoft hereby grants to You a nonexclusive,
royalty-free, nontransferable, worldwide license under Microsoft鈥檚
patents embodied solely within the Specification and that are owned
or licensable by Microsoft to make, use, import, offer to sell,
sell and distribute directly or indirectly to Your Licensees Your
Implementation. You may sublicense this patent license to Your
Licensees under the same terms and conditions."

The said extension is maintained by Microsoft for Microsoft.

Yet it is fairly common for various devices to use it, and a
popular proprietary operating system expects devices to provide
"OS descriptors", so Linux-based USB gadgets whishing to be able
to talk to a variety of operating systems should be able to provide
the "OS descriptors".

This patch adds optional support for gadgets whishing to expose
the so called "OS String" under index 0xEE of language 0.
The contents of the string is generated based on the qw_sign
array and b_vendor_code.

Interested gadgets need to set the cdev->use_os_string flag,
fill cdev->qw_sign with appropriate values and fill cdev->b_vendor_code
with a value of their choice.

This patch does not however implement responding to any vendor-specific
USB requests."

Signed-off-by: Li Jun <jun.li@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
2021-01-31 14:08:56 +01:00
Li Jun
c93edbf538 usb: gadget: don't change ep name for dwc3 while ep autoconfig
As the SDP protocol use the predefined ep num for communication, we can't
change its name hence reset its ep num while do ep autoconfig, this is
only apply for SPL.

Signed-off-by: Li Jun <jun.li@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
2021-01-31 14:08:56 +01:00
Ye Li
71a5732b43 usb: gadget: Add ep_config call back to usb_gadget_ops
Since some new fields in usb_ep structure been moved to usb_ss_ep.
The CDNS3 gadget driver should replies on this operation to bind the
usb_ss_ep with the endpoint descriptor when function layer uses
usb_ep_autoconfig to add endpoint descriptors to gadget. So that
CDNS3 driver can know the EP information and configure the EP once
the set configuration request is received.

Signed-off-by: Sherry Sun <sherry.sun@nxp.com>
Signed-off-by: Ye Li <ye.li@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
2021-01-31 14:08:56 +01:00
Pali Rohár
f2fa499883 usb: gadget: Do not export usbd_device_* arrays
Each array is used only in one file (core.c or ep0.c). Move their content
to correct file, mark them as static and do not export out of current file.

This change allows to decrease size of u-boot.bin as more of those strings
are not used.

Signed-off-by: Pali Rohár <pali@kernel.org>
2021-01-31 14:08:56 +01:00
Marek Szyprowski
e47431aa5c thor: add support for the dfu_alt_info reintialization from the flashed script
Reinitialize dfu_env_entities after flashing the 'SCRIPT' entity to
ensure that the potential changes to the 'dfu_alt_info' environment
variable are applied.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
2021-01-31 14:08:56 +01:00
Marek Szyprowski
9129f2f164 dfu: add support for the dfu_alt_info reintialization from the flashed script
Reinitialize DFU USB gadget after flashing the 'SCRIPT' entity to ensure
that the potential changes to the 'dfu_alt_info' environment variable are
applied.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
[lukma - I've moved the bool retry to avoid build (CI) errors]
2021-01-31 14:08:56 +01:00
Marek Szyprowski
c533f94c10 dfu: add 'SCRIPT' entity
Define a new 'SCRIPT' type for DFU entities. The downloaded data are
treated as simple u-boot's scripts and executed with run_command_list()
function.

Flashing the 'SCRIPT' entity might result in changing the 'dfu_alt_info'
environment variable from the flashed script, so add a global variable
for tracking the potential need to reinitialize the dfu_alt_info related
structures.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
2021-01-31 14:08:56 +01:00
Jaehoon Chung
b5f3405b9d dfu: add 'SKIP' entity
Define a new 'SKIP' type for the DFU entities. The flashed data for that
entity is simply ignored without returning any error values.

This allows to have one flashing procedure and images for the different
board types or variants, where each board uses only the images relevant
to it and skips the rest. This is especially usefull for the THOR
protocol, which usually transfers more than one file in a single session.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Minkyu Kang <mk7.kang@samsung.com>
[mszyprow: rephrased commit message and docs for easier reading, changed
	   subject to "dfu: add 'SKIP' entity"]
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
2021-01-31 14:08:56 +01:00
Marek Szyprowski
f21358ad6c dfu: mmc: use the default MMC device if entity specifies it as -1
Use the default MMC device set in the command line if entity specifies it
as -1. This allows to use the same dfu_alt_info string for different MMC
devices (like embedded eMMC and external SD card if data layout is the
same on both devices).

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
2021-01-31 14:08:56 +01:00
Marek Szyprowski
c954ff5fbf cmd: usb_mass_storage: show device interface name
Show the interface name (i.e. 'mmc') in the information string to ease
user checking which device is exported via USB Mass Storage protocol.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Lukasz Majewski <lukma@denx.de>
2021-01-31 14:08:56 +01:00
Andy Shevchenko
6ffc8e2993 f_fastboot: Avoid use-after-free in the global pointer variable
In case of usb_add_function() failure the error path has an issue,
i.e the global pointer variable is assigned to garbage

Fix the above mentioned issue by assigning pointer to NULL.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2021-01-31 14:08:56 +01:00
Andy Shevchenko
ff52577c1b f_rockusb: Avoid use-after-free in the global pointer variable
In case of usb_add_function() failure the error path has two issues:
 - the potentially allocated structure isn't getting freed
 - the global pointer variable is assigned to garbage

Fix the above mentioned issues by freeing memory and assigning NULL.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2021-01-31 14:08:56 +01:00
Andy Shevchenko
0234609d96 f_rockusb: Use NULL instead of 0 for pointers
get_rkusb() mistakenly uses integers without cast.
Convert them to proper type.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2021-01-31 14:08:56 +01:00
Eugeniu Rosca
bafdf4caac cmd: bcb: Add support for processing const string literals in bcb_set()
On request/suggestion from Simon Glass back in May 22 2019 [1], the
'strsep' mechanism implemented in bcb_set() was set to work directly
with user-provided argv strings, to avoid duplicating memory and for
the sake of simpler implementation.

However, since we recently exposed bcb_write_reboot_reason() API to be
called by U-Boot fastboot, the idea is to be able to pass const string
literals to this new BCB API, carrying the reboot reason.

Since 'strsep' (just like its older/superseded sibling 'strtok')
modifies the input string passed as parameter, BCB command in its
current state would attempt to perform in-place modifications in a
readonly string, which might lead to unexpected results.

Fix the above with the cost of one dynamic memory allocation ('strdup').
This will also ensure no compiler warnings when passing string literals
to bcb_write_reboot_reason().

[1] http://u-boot.10912.n7.nabble.com/PATCH-v2-0-2-Add-bcb-command-to-read-modify-write-Android-BCB-td369934i20.html#a370456

Cc: Simon Glass <sjg@chromium.org>
Signed-off-by: Eugeniu Rosca <erosca@de.adit-jv.com>
Signed-off-by: Roman Kovalivskyi <roman.kovalivskyi@globallogic.com>
2021-01-31 14:08:56 +01:00
Eugeniu Rosca
e74670adfe cmd: bcb: Expose 'bcb_write_reboot_reason' to external callers
Fastboot is evolving and beginning with commit [1], the
upstream implementation expects bootloaders to offer support for:
 - reboot-recovery
 - reboot-fastboot

The most natural way to achieve the above is through a set of
pre-defined "reboot reason" strings, written into / read from
the BCB "command" field, e.g.:
 - bootonce-bootloader [2]
 - boot-fastboot [3]
 - boot-recovery [4]

Expose the first 'bcb' API meant to be called by e.g. fastboot stack,
to allow updating the BCB reboot reason via the BCB 'command' field.

[1] https://android.googlesource.com/platform/system/core/+/dea91b4b5354af2
    ("Add fastbootd.")
[2] https://android.googlesource.com/platform/bootable/recovery/+/cba7fa88d8b9
    ("Add 'reboot bootloader' to bootloader_message.")
[3] https://android.googlesource.com/platform/bootable/recovery/+/eee4e260f9f6
    ("recovery: Add "boot-fastboot" command to BCB.")
[4] https://android.googlesource.com/platform/system/core/+/5e98b633a748695f
    ("init: Write the reason in BCB on "reboot recovery"")

Signed-off-by: Eugeniu Rosca <erosca@de.adit-jv.com>
Signed-off-by: Roman Kovalivskyi <roman.kovalivskyi@globallogic.com>
[lukma - added missing #include <linux/errno.h> to avoid build breaks]
2021-01-31 14:08:56 +01:00
Eugeniu Rosca
e2ffb3be49 cmd: bcb: Extract '__bcb_store' from 'do_bcb_store' for internal needs
Enriching the functionality of U-Boot 'bcb' may assume using the
existing sub-commands as building blocks for the next ones.

A clean way to achive the above is to expose a number of static
routines, each mapped to an existing user command (e.g. load/set/store),
with a user/caller-friendly prototype (i.e. do not force the caller
to wrap an integer into a string).

This third patch makes '__bcb_store' available for internal needs.

No functional change intended.

Signed-off-by: Eugeniu Rosca <erosca@de.adit-jv.com>
Signed-off-by: Roman Kovalivskyi <roman.kovalivskyi@globallogic.com>
2021-01-31 14:08:56 +01:00
Eugeniu Rosca
02ebe6deae cmd: bcb: Extract '__bcb_set' from 'do_bcb_set' for internal needs
Enriching the functionality of U-Boot 'bcb' may assume using the
existing sub-commands as building blocks for the next ones.

A clean way to achive the above is to expose a number of static
routines, each mapped to an existing user command (e.g. load/set/store),
with a user/caller-friendly prototype (i.e. do not force the caller
to wrap an integer into a string).

This second patch makes '__bcb_set' available for internal needs.

No functional change intended.

Signed-off-by: Eugeniu Rosca <erosca@de.adit-jv.com>
Signed-off-by: Roman Kovalivskyi <roman.kovalivskyi@globallogic.com>
2021-01-31 14:08:56 +01:00
Eugeniu Rosca
24e85bbd69 cmd: bcb: Extract '__bcb_load' from 'do_bcb_load' for internal needs
Enriching the functionality of U-Boot 'bcb' may assume using the
existing sub-commands as building blocks for the next ones.

A clean way to achive the above is to expose a number of static
routines, each mapped to an existing user command (e.g. load/set/store),
with a user/caller-friendly prototype (i.e. do not force the caller
to wrap an integer into a string).

This first patch makes '__bcb_load' available for internal needs.

No functional change, except for a tiny update in error handling.

Signed-off-by: Eugeniu Rosca <erosca@de.adit-jv.com>
Signed-off-by: Roman Kovalivskyi <roman.kovalivskyi@globallogic.com>
2021-01-31 14:08:56 +01:00
Seung-Woo Kim
8b387f112b gadget: f_thor: fix wrong file size cast
Casting 32bit int value directly into 64bit unsigned type causes
wrong value for file size equal or larger than 2GB. Fix the wrong
file size by casting uint32_t first.

Fixes: commit 1fe9ae76b1 ("gadget: f_thor: update to support more than 4GB file as thor 5.0")
Reported-by: Junghoon Kim <jhoon20.kim@samsung.com>
Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
2021-01-31 14:08:56 +01:00
Guillermo Rodriguez
1b3c4cb1e3 dfu: Fix handling of UBI partitions in MTD backend
For UBI partitions ("partubi" in dfu_alt_info), dfu_fill_entity_mtd sets
the mtd.ubi flag; however other functions incorrectly check for nand.ubi
instead. Fix this by checking for the correct flag.

Signed-off-by: Guillermo Rodriguez <guille.rodriguez@gmail.com>
Cc: Lukasz Majewski <lukma@denx.de>
Reviewed-by: Patrick Delaunay <patrick.delaunay@st.com>
2021-01-31 14:08:56 +01:00
Marek Vasut
8a73bef338 mmc: tmio: sdhi: Configure internal DMA bus width
The R-Car3 SDHI should set these two bits in DMA_MODE register according
to the specification, to indicate 64bit bus width. No other bus width
options are permitted and the default value is 0, which is incorrect.
Set the bits accordingly.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
2021-01-31 14:08:45 +01:00
Biju Das
32568ee5b9 arm: dts: rmobile: r8a774a1: Synchronize DTs with Linux 5.10
DTS files apart from r8a774a1-hihope-rzg2m-u-boot.dts and
r8a774a1-u-boot.dtsi have been imported from linux 5.10
commit 2c85ebc57b3e1817 ("Linux 5.10").

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
2021-01-31 14:08:45 +01:00
Heinrich Schuchardt
f84eda89e5 disk: part: sandbox support in dev_print()
Commands like 'fatinfo' call dev_print() to print device information. If
the block device is created via 'host bind', we should print accurate
information.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2021-01-30 14:25:42 -07:00
Heinrich Schuchardt
168e313b5b sandbox: fill block device meta information
Provide information about host backed block device.

Mark the device created by 'host bind' as removable.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2021-01-30 14:25:42 -07:00
Dario Binacchi
fabae8711f dm: replace auto_alloc_size with auto
The auto_alloc_size members of struct driver has been renamed auto.

Signed-off-by: Dario Binacchi <dariobin@libero.it>
Reviewed-by: Simon Glass <sjg@chromium.org>
2021-01-30 14:25:42 -07:00
Stanislav Pinchuk
a00e0f7ae5 do not pass NULL pointer to libfdt
Re-send because of line-wraps.

Without this patch, u-boot just hangs if the fdt pointer is
not initialized. The diagnostic subsystems are not yet initialized,
so all you get is a blind hang.

Signed-off-by: Stanislav.Pinchuk@kaspersky.com
2021-01-30 14:25:42 -07:00
Heinrich Schuchardt
43db07507a sandbox: keep time offset when resetting
The UEFI Self Certification Test (SCT) checks the SetTime() service with
the following steps:

* set date
* reset
* check date matches

To be compliant the sandbox should keep the offset to the host RTC during
resets. The implementation uses the environment variable
UBOOT_SB_TIME_OFFSET to persist the offset.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
2021-01-30 14:25:42 -07:00
Simon Glass
5e6c9029cd binman: Print a debug message when binman selects a node
Add some debugging to indicate which node the binman library is looking
at.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-01-30 14:25:42 -07:00
Simon Glass
3306eeca89 Add a symlink for ctype.h
Libraries that link with U-Boot typically may expect to be able to include
ctype.h but this file is in a different place in U-Boot. Add a symlink to
make this work.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-01-30 14:25:42 -07:00
Simon Glass
ff5fa7d626 dm: core: Update ofnode_read_fmap_entry() to read hashes
At present this function uses the old format for reading hashes. Add
support for the current format.

Add a test while we are here.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-01-30 14:25:42 -07:00
Simon Glass
017d421828 dm: core: Add a comment about pinctrl_select_state()
The use of pinctrl in the core of driver model is useful but can provoke
some strange behaviour. Add a comment to aid debugging.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-01-30 14:25:42 -07:00
Simon Glass
0dc2bf2b6e clk: x86: Correct the driver name
The current driver name does not match its compatible string, so
of-platdata does not work correctly. Fix it.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-01-30 14:25:41 -07:00
Simon Glass
5c5992cb90 clk: Add debugging for return values
Use the log_msg_ret() mechanism to get error-return information when
clocks fail to probe, etc.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-01-30 14:25:41 -07:00
Simon Glass
ef79ef21a8 dm: core: Don't inline dev_read...() calls with of-platdata
At present if these calls are used with of-platdata, a confusing error is
produced, referring to a function not actually called by the code causing
the problem.

Fix this by not inlining, so that the error mentions the dev_read_...()
function and it is more obvious what is going on.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-01-30 14:25:41 -07:00
Simon Glass
d85f2c4f29 sandbox: Disable I2C emulators in SPL
These cannot work with of-platdata since they currently need the
devicetree at runtime. Disable the emulators and the sandbox I2C driver
that needs them. We can enable these later, if needed for testing.

Switch the of_plat_parent test over to use a simple bus instead.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heiko Schocher <hs@denx.de>
2021-01-30 14:25:41 -07:00
Simon Glass
dfb5bfbc20 i2c: desigware: Add an alias for Intel Apollo Lake
Add an alias so that this driver can be used in TPL on coral.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heiko Schocher <hs@denx.de>
2021-01-30 14:25:41 -07:00
Simon Glass
442e6305b5 x86: coral: Support TPM and RTC in SPL
Update the devicetree so that the TPM and RTC can be used in SPL. Also
enable the pins used for getting the memory configuration settings while
we are here.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-01-30 14:25:41 -07:00
Simon Glass
1426174f3f spl: Tidy up SPL/TPL malloc sizes
The current help talks about relocation which doesn't apply to SPL and
TPL. Update it to avoid confusion.

Also make the TPL size default to the same as the SPL size, since this is
more likely to be a useful value than the one used by U-Boot proper, which
may be quite a bit larger.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-01-30 14:25:41 -07:00
Simon Glass
10f746591f cros_ec: Add vstore support
The EC can store small amounts of data for the benefit of the
verified boot process. Since the EC is seldom reset, this can allow the
AP to store data that survives a reboot or a suspend/resume cycle.

Add support for this.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-01-30 14:25:41 -07:00
Simon Glass
d9ffaef6fe cros_ec: Allow use with of-platdata
Avoid reading the device tree when of-platdata is in use.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-01-30 14:25:41 -07:00
Simon Glass
3ae338299e cros_ec: Show events in human-readable form
Add a command to show the current events as a list of names. This is
easier to decipher than a bit mask.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-01-30 14:25:41 -07:00
Simon Glass
3a6c994f38 cros_ec: Add support for switches
On x86 platforms the EC provides a way to read 'switches', which are
on/off values determined by the EC.

Add a new driver method for this and implement it for LPC.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-01-30 14:25:41 -07:00
Simon Glass
2b4b653391 cros_ec: Add documentation for cros_ec driver operations
Add comments to these methods so it is documented in this central place,
not just in each driver.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-01-30 14:25:41 -07:00
Simon Glass
8aec32f6ab cros_ec: Support reading EC features
The EC can support a variety of features and provides a way to find out
what is available. Add support for this.

Also update the feature list to the lastest available while we are here.
This is at:

   https://chromium.googlesource.com/chromiumos/platform/ec/+/refs/heads/master/include/ec_commands.h

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-01-30 14:25:41 -07:00
Simon Glass
7791df576c cros_ec: Add support for reading the SKU ID
This allows reading strapping pins attached to the EC. Add an
implementation for this.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-01-30 14:25:41 -07:00
Simon Glass
698e30f7a8 cros_ec: Add run-time check for input buffer overflow
This should not happen in normal operation, but the EC might have a bug,
so add a run-time check just in case.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-01-30 14:25:41 -07:00