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Recently, aspeed-mctp driver functionality was extended to store BDF
values for already discovered MCTP endpoints on PCIe bus.
Let's expose kernel API to read BDF based on endpoint ID.
Change-Id: I146e67a8c2f4f541b4c3065c18dcadf531f30670
Signed-off-by: Iwona Winiarska <iwona.winiarska@intel.com>
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Support interrupt generation for both 16 and 32 mailbox registers.
Tested:
After applied this patch, write the mailbox registers from BIOS side,
the misc manager can capture the new mailbox data.
Change-Id: I4030b6df176a53656aea9cb68ee80b67add8ed14
Signed-off-by: Yong Li <yong.b.li@linux.intel.com>
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Remove temporary workaround to register first
user space client as default client.
Change-Id: I9e020be0815422c125f38713ce21a6ac3cdba1ad
Signed-off-by: Andrzej Kacprowski <andrzej.kacprowski@linux.intel.com>
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This commit moves Aspeed eSPI driver from misc to soc/aspeed tree
to make correct probing order for LPC and eSPI driver. Since LPC
runs over eSPI, eSPI driver should be registered ahead of LPC
driver.
Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@intel.com>
Change-Id: I6c813c3e29ddb02c86e3266b9fc713a8b410169e
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Now that it is possible to send PECI frames via aspeed-mctp driver,
let's add aspeed-peci-mctp node to allow bind peci-mctp-aspeed adapter
driver.
Change-Id: Ie511af2896a6626d7179cd9475ec9ef8c7309496
Signed-off-by: Iwona Winiarska <iwona.winiarska@intel.com>
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Currently driver submits 1 (or rarely more than 1) packet then
waits until HW signals transmission completion before sending
more packets. This logic requires interrupt after each packet,
aspeed_mctp_tx_tasklet() is invoked twice per packet.
New logic uses TX ring correctly, packets are added to the end of
circular ring buffer. The driver does not have to wait for HW to
complete transmission of enqueued packets before adding more packets
to TX queue. Interrupt is generated only if TX ring if full.
This change significantly improves packet transmission performance:
PECI GetTemp command takes ~25us instead of ~30us.
This change also fixes sporadic TX hangs during host reboot seen
with current driver.
Change-Id: Ia12f71eb048c10e7aa0dd3821206044698d0c7f9
Signed-off-by: Andrzej Kacprowski <andrzej.kacprowski@linux.intel.com>
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If self EID is known then the driver updates source EID in
MCTP header of sent packets. For MCTP control packets the
source EID is not updated as it may disrupt MCTP discovery flow.
Self EID is determined from list of known endpoints provided
by ASPEED_MCTP_IOCTL_SET_EID_INFO IOCTL.
Change-Id: I8d6d0aebac096859a55694d6d82540aea8264085
Signed-off-by: Andrzej Kacprowski <andrzej.kacprowski@linux.intel.com>
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Fix error when swapping two empty lists.
Copy count in ASPEED_MCTP_GET_EID_INFO to userbuf instead of
incorrectly returning it by value.
Change-Id: I8549a3a988d1f44106582729b9a6eca650ded256
Signed-off-by: Karol Wachowski <karol.wachowski@intel.com>
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Fixed a missing error handling for case where
wait_event_interruptible_timeout() returns -ERESTARTSYS.
Renamed the exposed functions to be more consistent with their usage.
Added dedicated function to flush client rx queue.
Change-Id: I0fd1bfca926b34ae0f4dc18f07e453b3861a4c3e
Signed-off-by: Iwona Winiarska <iwona.winiarska@intel.com>
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Under even moderate traffic the driver can miss a lot of received
packets and eventually stops receiving packets at all.
There is an bug in AST2600 RX logic where HW does not wrap
around RX read buffer pointer correctly. Current driver
workaround for this bug resets RX HW read pointer to 0 whenever
it reaches end of the RX buffer ring - this does not work properly
if more than 1 packet is received while RX pointer is close to
the end of the RX buffer ring - in such case HW can detect ring
full condition and stop RX.
The new workaround has different logic: it sets HW buffer count to
4n - 1 and updates driver maintained RX write pointer so it
tracks HW read pointer to prevent hardware from stopping.
Received packets are located by looking into RX data buffers
rather that HW read pointer that contains incorrect value anyway.
Driver never resets HW read pointer, HW is receiving packets without
any interference form the driver.
Also handle RX_CMD_NO_MORE_INT - if RX ring if full then
HW will clear RX_CMD_READY bit and we need to re-enable it
once we free some space in RX ring.
Change-Id: I0a94fd43a91f17677e6df9da7bb71b3254543de0
Signed-off-by: Andrzej Kacprowski <andrzej.kacprowski@linux.intel.com>
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Some protocols that are already implemented in kernel can be
encapsulated in MCTP packets. To allow use aspeed-mctp internally in
kernel space, let's allow to use selected functions outside of
aspeed-mctp.
Change-Id: I543bfce975dfdd7cf8017899a139f69febbaca8d
Signed-off-by: Iwona Winiarska <iwona.winiarska@intel.com>
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Right now, TX ring contains packets with PCIe header already swapped
to little endian (byte order expected by HW), while RX ring contains
packets with PCIe header already swapped to network order (expected by
userspace).
Let's keep TX packets in network order and swap before write to HW
buffer.
To make it more readable, let's extract swapping into a helper function.
Change-Id: I6c69ad9b3c9f68b2ef416eaf9259798cf011b8c4
Signed-off-by: Iwona Winiarska <iwona.winiarska@intel.com>
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Implement two new ioctls for storing EID related information:
* ASPEED_MCTP_IOCTL_GET_EID_INFO
* ASPEED_MCTP_IOCTL_SET_EID_INFO
Driver stores EID mapping in a list which is traversed when
one tries to get information using ASPEED_MCTP_IOCTL_GET_EID_INFO
ioctl, when given EID mapping is not found in the list, next entry
is returned. When there are no entries with EIDs higher than specified
in the IOCTL call -ENODEV is returned.
Whenever new information about EID mapping is stored with
ASPEED_MCTP_IOCTL_SET_EID_INFO ioctl driver empties exsiting
list of mappings and creates new one based on user input.
After insertion list is sorted by EID. Invalid input
such as duplicated EIDs will cause driver to return -EINVAL.
Change-Id: I41e4e4e83f451a8367d58bbf9b67e8e8f7d080f4
Signed-off-by: Karol Wachowski <karol.wachowski@intel.com>
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Uevent objects are different for PCI_READY=0 and PCI_READY=1.
Let's make uevents consistent and use the same object in both cases.
Change-Id: I68dbed9b2b552999cf6858975294d570b5522e86
Signed-off-by: Iwona Winiarska <iwona.winiarska@intel.com>
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MCTP client can register for receiving packets with selected
MCTP message type or PCIE vendor defined message type.
Vendor defined type is 2 bytes but in Intel VDMs the first byte
is variable and only the second byte contains constant message
type - to support this use case we have to specify 2 byte mask
that is applied to packet type before comparing with registered
vendor type.
When MCTP packet arrives its header is compared with a list
of registered (vendor) types.
If no client registered for packet's (vendor) type then
the packet is dispatched to the default client.
Fragmented packets are not considered for type matching.
Only one client can register for given (vendor) type.
Client can register for multiple (vendor) types.
All packet fields must be specified in big endian byte
order.
This feature allows to support multiple clients simultaneously
but only one client per (vendor) message type.
For example we can have PECI client in kernel that uses PECI
vendor message type, dcpmm daemon in user space that handles
NVDIMM vendor type messages and mctpd service that handles MCTP
control and PLDM message types.
tested with peci_mctp_test application
Change-Id: I8a9fed3d4b2f2628782299928abd15bdd7af9387
Signed-off-by: Andrzej Kacprowski <andrzej.kacprowski@linux.intel.com>
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Add IOCTL to register given client as default client that
receives all packets that were not dispatched to other
clients.
This IOCTL is intended to be used by mctpd service or test
application that should receive all packets that are not
claimed by other clients.
mctpd service might not be the first user space
client since dcpmm or telemetry client can start
before mctpd or mctpd can crash and be restarted
automatically at any time.
To preserve backward compatibility with mctpd, the first user space
client will be registered automatically as default client - once mctpd
is modified to call ASPEED_MCTP_IOCTL_REGISTER_DEFAULT_HANDLER we
can remove this workaround.
Change-Id: I9e7f48ef0efab1813122daf131ff23476f0fae76
Signed-off-by: Andrzej Kacprowski <andrzej.kacprowski@linux.intel.com>
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Whenever MCTP packet arrives it is dispatched to a specific
client - there is no need to wake up all clients
waiting in aspeed_mctp_poll().
Move wait queue from driver structure to client structure.
Change-Id: Ifd64e55a8a92a186330e5bcd7b77947408dfa698
Signed-off-by: Andrzej Kacprowski <andrzej.kacprowski@linux.intel.com>
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This commit adds minimal support for multiple clients.
Currently packets are dispatched to default client.
Support for dispatching incoming packets to different
clients will be added in subsequent patches.
Change-Id: Ie317b5287c2a3e3f89e035a9c655dfb0841d4e57
Signed-off-by: Andrzej Kacprowski <andrzej.kacprowski@linux.intel.com>
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dev-5.8-intel
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aspeed-mctp: Set PCI requester ID in MCTP packets
aspeed-mctp driver should not allow clients to use arbitrary
PCI requester ID in sent packets - the requester ID should be
forced to BDF of the local PCI endpoint.
If local PCI endpoint BDF is unknown then -EIO error is
returned when trying to send or receive packets.
Also allow clients to open connection to KMD even
if BDF is currently unknown.
Fixed read() and write() error checking.
Change-Id: Idabc6f36a72f2204bbb395193174798e3500db65
Signed-off-by: Andrzej Kacprowski <andrzej.kacprowski@linux.intel.com>
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Fix invalid HDR order by storing swapped mctp header in rx_packet
instead of swapping it in place.
Signed-off-by: Karol Wachowski <karol.wachowski@intel.com>
Change-Id: I15f692a25ab56c38330f7fff82171bb903e53b21
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Currently, there is no proper MCTP networking subsystem in Linux.
Until we are able to work out the details of that, we are going to
expose HW to userspace using raw read/write interface.
Because of that, this driver is not intended to be submitted upstream.
Here we are providing a simple device driver for AST2600 MCTP
controller.
v2: Added workarounds for BMC reboot/reset, corrected endianess comment,
changed TX_BUF_ADDR to be consistent, fixed typos.
v3: Added workaround for RX hang, added swapping PCIe VDM header to
network order, corrected buffer allocation size.
v4: Fixed TX broken after sending 32 byte packet
Signed-off-by: Iwona Winiarska <iwona.winiarska@intel.com>
Signed-off-by: Andrzej Kacprowski <andrzej.kacprowski@linux.intel.com>
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This commit adds an interface for reading chip unique id value.
Optionally, the id can be encrypted using a dts-supplied hash data.
Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@intel.com>
Signed-off-by: Vernon Mauery <vernon.mauery@linux.intel.com>
Signed-off-by: Arun P. Mohanan <arun.p.m@linux.intel.com>
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Modifying the mailbox driver to use FIFO queue while using interrupt.
Signed-off-by: Arun P. Mohanan <arun.p.m@linux.intel.com>
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Add a read-only property, to support export register bits as read-only.
Signed-off-by: Yong Li <yong.b.li@linux.intel.com>
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The copy_from_user() function returns the number of bytes remaining
which we weren't able to copy. This should return -EFAULT to the
user.
OpenBMC-Staging-Count: 1
Fixes: 86609baa4217 ("soc: aspeed: xdma: Add user interface")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Eddie James <eajames@linux.ibm.com>
Link: https://lore.kernel.org/r/20200930090334.GB621698@mwanda
Signed-off-by: Joel Stanley <joel@jms.id.au>
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This commit adds a checking code when it gets -EPROBE_DEFER while
getting a clock resource. In this case it doesn't need to print
out an error message because the probing will be re-visited.
Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@intel.com>
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If LPC SNOOP driver is registered ahead of lpc-ctrl module, LPC
SNOOP block will be enabled without heart beating of LCLK until
lpc-ctrl enables the LCLK. This issue causes improper handling on
host interrupts when the host sends interrupt in that time frame.
Then kernel eventually forcibly disables the interrupt with
dumping stack and printing a 'nobody cared this irq' message out.
To prevent this issue, all LPC sub-nodes should enable LCLK
individually so this patch adds clock control logic into the LPC
SNOOP driver.
Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@intel.com>
Signed-off-by: Vernon Mauery <vernon.mauery@linux.intel.com>
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Implement a memory driver for BMC to access VGA share memory.
The driver is used by MDRV2. In MDRV2 BIOS will send whole
SMBIOS table to VGA memory and BMC can get the table from VGA
memory through this driver.
Signed-off-by: Cheng C Yang <cheng.c.yang@intel.com>
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Add lpc sio device driver for AST2500/2400
Signed-off-by: Yong Li <yong.b.li@intel.com>
Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@intel.com>
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This commit adds back the lpc mbox driver which was removed from
the openbmc linux dev-5.2 tree.
This driver should be rewritten later.
Signed-off-by: Cyril Bur <cyrilbur@gmail.com>"
Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@intel.com>
Signed-off-by: Arun P. Mohanan <arun.p.m@linux.intel.com>
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>> drivers/soc/aspeed/aspeed-lpc-ctrl.c:247:17: warning: format '%zu'
expects argument of type 'size_t', but argument 3 has type
'resource_size_t' {aka 'unsigned int'} [-Wformat=]
Documentation/core-api/printk-formats.rst suggests %pa should work for
resouce_size_t, but it did not:
%pa[p] 0x01234567 or 0x0123456789abcdef
For printing a phys_addr_t type (and its derivatives, such as
resource_size_t) which can vary based on build options, regardless of the
width of the CPU data path.
Instead cast to an integer which works as all aspeed processors are 32-bit.
OpenBMC-Staging-Count: 2
Signed-off-by: Joel Stanley <joel@jms.id.au>
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Users of the XDMA engine need a way to reset it if something goes wrong.
Problems on the host side, or user error, such as incorrect host
address, may result in the DMA operation never completing and no way to
determine what went wrong. Therefore, add an ioctl to reset the engine
so that users can recover in this situation.
OpenBMC-Staging-Count: 2
Signed-off-by: Eddie James <eajames@linux.ibm.com>
Acked-by: Andrew Jeffery <andrew@aj.id.au>
Signed-off-by: Joel Stanley <joel@jms.id.au>
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This commits adds a miscdevice to provide a user interface to the XDMA
engine. The interface provides the write operation to start DMA
operations. The DMA parameters are passed as the data to the write call.
The actual data to transfer is NOT passed through write. Note that both
directions of DMA operation are accomplished through the write command;
BMC to host and host to BMC.
The XDMA driver reserves an area of physical memory for DMA operations,
as the XDMA engine is restricted to accessing certain physical memory
areas on some platforms. This memory forms a pool from which users can
allocate pages for their usage with calls to mmap. The space allocated
by a client will be the space used in the DMA operation. For an
"upstream" (BMC to host) operation, the data in the client's area will
be transferred to the host. For a "downstream" (host to BMC) operation,
the host data will be placed in the client's memory area.
Poll is also provided in order to determine when the DMA operation is
complete for non-blocking IO.
OpenBMC-Staging-Count: 2
Signed-off-by: Eddie James <eajames@linux.ibm.com>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
Signed-off-by: Joel Stanley <joel@jms.id.au>
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The XDMA engine embedded in the AST2500 and AST2600 SOCs performs PCI
DMA operations between the SOC (acting as a BMC) and a host processor
in a server.
This commit adds a driver to control the XDMA engine and adds functions
to initialize the hardware and memory and start DMA operations.
OpenBMC-Staging-Count: 2
Signed-off-by: Eddie James <eajames@linux.ibm.com>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
Signed-off-by: Joel Stanley <joel@jms.id.au>
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The ast2600 disables the mapping of AHB memory regions by default,
only allowing the LPC window to point to SPI NOR. In order to point the
window to any AHB address, an ast2600 specific bit must be toggled.
OpenBMC-Staging-Count: 3
Signed-off-by: Joel Stanley <joel@jms.id.au>
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Alignment is a hardware constraint of the LPC2AHB bridge, and misaligned
reserved memory will present as corrupted data.
OpenBMC-Staging-Count: 4
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Signed-off-by: Joel Stanley <joel@jms.id.au>
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The AST2600(G6) has the same lpc-ctrl and lpc-snoop devices as the
AST2500.
OpenBMC-Staging-Count: 4
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
Acked-by: Andrew Jeffery <andrew@aj.id.au>
Signed-off-by: Joel Stanley <joel@jms.id.au>
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The ASPEED BMC SoCs have many knobs and switches that are sometimes
design-specific and often defy any approach to unify them under an
existing subsystem.
Add a driver to translate a devicetree table into sysfs entries to
expose bits and fields for manipulation from userspace. This encompasses
concepts from scratch registers to boolean conditions to enable or
disable host interface features.
OpenBMC-Staging-Count: 11
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Signed-off-by: Joel Stanley <joel@jms.id.au>
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Since commit 84af7a6194e4 ("checkpatch: kconfig: prefer 'help' over
'---help---'"), the number of '---help---' has been gradually
decreasing, but there are still more than 2400 instances.
This commit finishes the conversion. While I touched the lines,
I also fixed the indentation.
There are a variety of indentation styles found.
a) 4 spaces + '---help---'
b) 7 spaces + '---help---'
c) 8 spaces + '---help---'
d) 1 space + 1 tab + '---help---'
e) 1 tab + '---help---' (correct indentation)
f) 1 tab + 1 space + '---help---'
g) 1 tab + 2 spaces + '---help---'
In order to convert all of them to 1 tab + 'help', I ran the
following commend:
$ find . -name 'Kconfig*' | xargs sed -i 's/^[[:space:]]*---help---/\thelp/'
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
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snoop_file_poll() is defined as returning 'unsigned int' but the
.poll method is declared as returning '__poll_t', a bitwise type.
Fix this by using the proper return type and using the EPOLL
constants instead of the POLL ones, as required for __poll_t.
Link: https://lore.kernel.org/r/20191121051851.268726-1-joel@jms.id.au
Fixes: 3772e5da4454 ("drivers/misc: Aspeed LPC snoop output using misc chardev")
Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
Signed-off-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Olof Johansson <olof@lixom.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/joel/aspeed into arm/drivers
ASPEED SoC updates for 5.3
LPC control driver changes and a fix.
* tag 'aspeed-5.3-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/joel/aspeed:
soc: aspeed: lpc-ctrl: Fix probe error handling
soc: aspeed: lpc-ctrl: make parameter optional
Signed-off-by: Olof Johansson <olof@lixom.net>
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gcc warns that a mising "flash" phandle node leads to undefined
behavior later:
drivers/soc/aspeed/aspeed-lpc-ctrl.c: In function 'aspeed_lpc_ctrl_probe':
drivers/soc/aspeed/aspeed-lpc-ctrl.c:201:18: error: '*((void *)&resm+8)' may be used uninitialized in this function [-Werror=maybe-uninitialized]
Only set the flash base and size if we find a phandle in the device
tree.
Reported-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
Reviewed-by: Vijay Khemka <vijaykhemka@fb.com>
Signed-off-by: Joel Stanley <joel@jms.id.au>
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Making memory-region and flash as optional parameter in device
tree if user needs to use these parameter through ioctl then
need to define in devicetree.
Signed-off-by: Vijay Khemka <vijaykhemka@fb.com>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
Signed-off-by: Joel Stanley <joel@jms.id.au>
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Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license as published by
the free software foundation either version 2 of the license or at
your option any later version
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-or-later
has been chosen to replace the boilerplate/reference in 3029 file(s).
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Add SPDX license identifiers to all Make/Kconfig files which:
- Have no license information of any form
These files fall under the project license, GPL v2 only. The resulting SPDX
license identifier is:
GPL-2.0-only
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull ARM SoC-related driver updates from Olof Johansson:
"Various driver updates for platforms and a couple of the small driver
subsystems we merge through our tree:
Among the larger pieces:
- Power management improvements for TI am335x and am437x (RTC
suspend/wake)
- Misc new additions for Amlogic (socinfo updates)
- ZynqMP FPGA manager
- Nvidia improvements for reset/powergate handling
- PMIC wrapper for Mediatek MT8516
- Misc fixes/improvements for ARM SCMI, TEE, NXP i.MX SCU drivers"
* tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (57 commits)
soc: aspeed: fix Kconfig
soc: add aspeed folder and misc drivers
spi: zynqmp: Fix build break
soc: imx: Add generic i.MX8 SoC driver
MAINTAINERS: Update email for Qualcomm SoC maintainer
memory: tegra: Fix a typos for "fdcdwr2" mc client
Revert "ARM: tegra: Restore memory arbitration on resume from LP1 on Tegra30+"
memory: tegra: Replace readl-writel with mc_readl-mc_writel
memory: tegra: Fix integer overflow on tick value calculation
memory: tegra: Fix missed registers values latching
ARM: tegra: cpuidle: Handle tick broadcasting within cpuidle core on Tegra20/30
optee: allow to work without static shared memory
soc/tegra: pmc: Move powergate initialisation to probe
soc/tegra: pmc: Remove reset sysfs entries on error
soc/tegra: pmc: Fix reset sources and levels
soc: amlogic: meson-gx-pwrc-vpu: Add support for G12A
soc: amlogic: meson-gx-pwrc-vpu: Fix power on/off register bitmask
fpga manager: Adding FPGA Manager support for Xilinx zynqmp
dt-bindings: fpga: Add bindings for ZynqMP fpga driver
firmware: xilinx: Add fpga API's
...
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Fixes build break:
scripts/kconfig/conf --allnoconfig Kconfig
drivers/soc/Kconfig:24: 'menu' in different file than 'menu'
drivers/soc/aspeed/Kconfig:1: location of the 'menu'
drivers/Kconfig:233: 'menu' in different file than 'menu'
drivers/soc/aspeed/Kconfig:1: location of the 'menu'
<none>:34: syntax error
Signed-off-by: Patrick Venture <venture@google.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
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Create a SoC folder for the ASPEED parts and place the misc drivers
currently present into this folder. These drivers are not generic part
drivers, but rather only apply to the ASPEED SoCs.
Signed-off-by: Patrick Venture <venture@google.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Olof Johansson <olof@lixom.net>
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