07 Jul, 2022
1 commit
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commit 62f79f3d0eb9f4c224bcc3c7f6fa758515a0a7fa upstream.
Set and increment the sequence number during the submit operation.
This prevents sequence number conflicts between different users of
the interface. A sequence number conflict may result in a user
getting an OCC response meant for a different command. Since the
sequence number is now modified, the checksum must be calculated and
set before submitting the command.Signed-off-by: Eddie James
Reviewed-by: Joel Stanley
Link: https://lore.kernel.org/r/20210721190231.117185-2-eajames@linux.ibm.com
Signed-off-by: Joel Stanley
Signed-off-by: Greg Kroah-Hartman
08 Apr, 2022
3 commits
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[ Upstream commit 83ba7e895debc529803a7a258653f2fe9bf3bf40 ]
A struct device can never be devm_alloc()'ed.
Here, it is embedded in "struct fsi_master", and "struct fsi_master" is
embedded in "struct fsi_master_aspeed".Since "struct device" is embedded, the data structure embedding it must be
released with the release function, as is already done here.So use kzalloc() instead of devm_kzalloc() when allocating "aspeed" and
update all error handling branches accordingly.This prevent a potential double free().
This also fix another issue if opb_readl() fails. Instead of a direct
return, it now jumps in the error handling path.Fixes: 606397d67f41 ("fsi: Add ast2600 master driver")
Suggested-by: Greg KH
Suggested-by: Guenter Roeck
Reviewed-by: Guenter Roeck
Signed-off-by: Christophe JAILLET
Link: https://lore.kernel.org/r/2c123f8b0a40dc1a061fae982169fe030b4f47e6.1641765339.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Greg Kroah-Hartman
Signed-off-by: Sasha Levin -
[ Upstream commit ab1b79159ad5a6dc4e4994b49737f7feb13b7155 ]
In commit f72ddbe1d7b7 ("fsi: scom: Remove retries") the retries were
removed from get and put scoms. That patch missed the retires in get and
put indirect scom.For the same reason, remove them from the scom driver to allow the
caller to decide to retry.This removes the following special case which would have caused the
retry code to return early:- if ((ind_data & XSCOM_DATA_IND_COMPLETE) || (err != SCOM_PIB_BLOCKED))
- return 0;I believe this case is handled.
Fixes: f72ddbe1d7b7 ("fsi: scom: Remove retries")
Signed-off-by: Joel Stanley
Reviewed-by: Eddie James
Link: https://lore.kernel.org/r/20211207033811.518981-3-joel@jms.id.au
Signed-off-by: Joel Stanley
Signed-off-by: Sasha Levin -
[ Upstream commit d46fddd52d11eb6a3a7ed836f9f273e9cf8cd01c ]
SCOM error handling is made complex by trying to pass around two bits of
information: the function return code, and a status parameter that
represents the CFAM error status register.The commit f72ddbe1d7b7 ("fsi: scom: Remove retries") removed the
"hidden" retries in the SCOM driver, in preference of allowing the
calling code (userspace or driver) to decide how to handle a failed
SCOM. However it introduced a bug by attempting to be smart about the
return codes that were "errors" and which were ok to fall through to the
status register parsing.We get the following errors:
- EINVAL or ENXIO, for indirect scoms where the value is invalid
- EINVAL, where the size or address is incorrect
- EIO or ETIMEOUT, where FSI write failed (aspeed master)
- EAGAIN, where the master detected a crc error (GPIO master only)
- EBUSY, where the bus is disabled (GPIO master in external mode)In all of these cases we should fail the SCOM read/write and return the
error.Thanks to Dan Carpenter for the detailed bug report.
Fixes: f72ddbe1d7b7 ("fsi: scom: Remove retries")
Link: https://lists.ozlabs.org/pipermail/linux-fsi/2021-November/000235.html
Reported-by: Dan Carpenter
Signed-off-by: Joel Stanley
Reviewed-by: Eddie James
Link: https://lore.kernel.org/r/20211207033811.518981-2-joel@jms.id.au
Signed-off-by: Joel Stanley
Signed-off-by: Sasha Levin
04 Jun, 2021
12 commits
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On BMCs with lower timer resolution than 1ms, msleep(1) will take
way longer than 1ms, so looping 10k times won't wait for 10s but
significantly longer.Fix this by using jiffies like the rest of the code.
Fixes: 9f4a8a2d7f9d ("fsi/sbefifo: Add driver for the SBE FIFO")
Signed-off-by: Joachim Fenkes
Link: https://lore.kernel.org/r/20200724071518.430515-3-joel@jms.id.au
Signed-off-by: Joel Stanley -
When the SBE requests a reset via the down FIFO, that is also the
FIFO we should go and reset ;)Fixes: 9f4a8a2d7f9d ("fsi/sbefifo: Add driver for the SBE FIFO")
Signed-off-by: Joachim Fenkes
Signed-off-by: Joel Stanley
Link: https://lore.kernel.org/r/20200724071518.430515-2-joel@jms.id.au
Signed-off-by: Joel Stanley -
When devm_ioremap_resource() fails, a clear enough error message will be
printed by its subfunction __devm_ioremap_resource(). The error
information contains the device name, failure cause, and possibly resource
information.Therefore, remove the error printing here to simplify code and reduce the
binary size.Reported-by: Hulk Robot
Signed-off-by: Zhen Lei
Link: https://patchwork.ozlabs.org/project/linux-fsi/patch/20210511085745.4340-1-thunder.leizhen@huawei.com/
Signed-off-by: Joel Stanley -
The lengthy timeout previously used sometimes resulted in
scheduling problems, detailed below. Therefore reduce the timeout
to 500us. This timeout selection is supported by the benchmarks
collected below with various clock dividers. This is purely the time
spent polling (reported by ktime_get()).div 1: max:150us avg: 2us
div 2: max:155us avg: 3us
div 4: max:149us avg: 7us
div 8: max:153us avg: 13us
div 16: max:197us avg: 21us
div 32: max:181us avg: 50us
div 64: max:262us avg:100usJan 22 01:27:21 rain27bmc kernel: rcu: INFO: rcu_sched self-detected stall on CPU
Jan 22 01:27:21 rain27bmc kernel: rcu: 0-....: (2099 ticks this GP) idle=0ca/1/0x40000002 softirq=349573/349573 fqs=1048
Jan 22 01:27:21 rain27bmc kernel: (t=2100 jiffies g=841149 q=7163)
Jan 22 01:27:21 rain27bmc kernel: NMI backtrace for cpu 0
Jan 22 01:27:21 rain27bmc kernel: CPU: 0 PID: 5959 Comm: ibm-read-vpd Not tainted 5.8.17-a9b4ea8 #1
Jan 22 01:27:21 rain27bmc kernel: Hardware name: Generic DT based system
Jan 22 01:27:21 rain27bmc kernel: Backtrace:
Jan 22 01:27:25 rain27bmc kernel: [] (dump_backtrace) from [] (show_stack+0x20/0x24)
...
Jan 22 01:27:25 rain27bmc kernel: [] (gic_handle_irq) from [] (__irq_svc+0x6c/0x90)
Jan 22 01:27:25 rain27bmc kernel: Exception stack(0xb79159b0 to 0xb79159f8)
Jan 22 01:27:25 rain27bmc kernel: 59a0: 9e88e5d5 00000559 00000559 00000018
Jan 22 01:27:25 rain27bmc kernel: 59c0: 00000000 9f217c55 00000003 00000559 a0201c00 bfa4d048 bfa4d000 b7915a44
Jan 22 01:27:25 rain27bmc kernel: 59e0: 40e88f8a b7915a00 3254e553 80734924 80030113 ffffffff
Jan 22 01:27:25 rain27bmc kernel: r9:b7914000 r8:a0201c00 r7:b79159e4 r6:ffffffff r5:80030113 r4:80734924
Jan 22 01:27:25 rain27bmc kernel: [] (__opb_read) from [] (aspeed_master_read+0xbc/0xcc)
Jan 22 01:27:25 rain27bmc kernel: r10:00000004 r9:00000002 r8:80734cdc r7:bd33fa40 r6:00000004 r5:bd33f840
Jan 22 01:27:25 rain27bmc kernel: r4:00201c00
Jan 22 01:27:25 rain27bmc kernel: [] (aspeed_master_read) from [] (fsi_master_read+0x6c/0x1bc)
...Signed-off-by: Eddie James
Link: https://lore.kernel.org/r/20210211194846.35475-1-eajames@linux.ibm.com
Signed-off-by: Joel Stanley -
Use devm_platform_ioremap_resource() to simplify code.
Signed-off-by: Yangtao Li
Reviewed-by: Andrew Jeffery
Link: https://lore.kernel.org/r/20191228190631.26777-1-tiny.windzz@gmail.com
Signed-off-by: Joel Stanley -
Log an error if the response checksum doesn't match the
calculated checksum.Signed-off-by: Eddie James
Reviewed-by: Joel Stanley
Link: https://lore.kernel.org/r/20210209171235.20624-3-eajames@linux.ibm.com
Signed-off-by: Joel Stanley -
If the OCC is not initialized and responds as such, the driver
should continue waiting for a valid response until the timeout
expires.Signed-off-by: Eddie James
Reviewed-by: Joel Stanley
Fixes: 7ed98dddb764 ("fsi: Add On-Chip Controller (OCC) driver")
Link: https://lore.kernel.org/r/20210209171235.20624-2-eajames@linux.ibm.com
Signed-off-by: Joel Stanley -
On a functioning FSI link there is not need to retry a write when doing
a scom in the driver.Allow the higher layers (eg. userspace) to attempt a retry if they want,
or to accept that the address they are talking to is not accessible.By removing the retries we can separate the error handling from retry
logic. In particular -EBUSY was used to force the get/put scom logic to
retry.Signed-off-by: Joel Stanley
Link: https://lore.kernel.org/r/20210527070109.225198-1-joel@jms.id.au
Signed-off-by: Joel Stanley -
The error bits in the FSI2PIB status are only cleared by a reset. So
the driver needs to perform a reset after seeing any of the FSI2PIB
errors, otherwise subsequent operations will also look like failures.Fixes: 6b293258cded ("fsi: scom: Major overhaul")
Signed-off-by: Eddie James
Reviewed-by: Joel Stanley
Link: https://lore.kernel.org/r/20210329151344.14246-1-eajames@linux.ibm.com
Signed-off-by: Joel Stanley -
When setting up a read or write to the OPB memory space, we must perform
five or six AHB writes. The ordering of these up until the trigger write
does not matter, so use writel_relaxed.The generated code goes from (Debian GCC 10.2.1-6):
mov r8, r3
mcr 15, 0, sl, cr7, cr10, {4}
str sl, [r6, #20]
mcr 15, 0, sl, cr7, cr10, {4}
str r3, [r6, #24]
mcr 15, 0, sl, cr7, cr10, {4}
str r1, [r6, #28]
mcr 15, 0, sl, cr7, cr10, {4}
str r2, [r6, #32]
mcr 15, 0, sl, cr7, cr10, {4}
mov r1, #1
str r1, [r6, #64] ; 0x40
mcr 15, 0, sl, cr7, cr10, {4}
str r1, [r6, #4]to this:
str r3, [r7, #20]
str r2, [r7, #24]
str r1, [r7, #28]
str r3, [r7, #64]
mov r8, #0
mcr 15, 0, r8, cr7, cr10, {4}
str r3, [r7, #4]Signed-off-by: Joel Stanley
Acked-by: Jeremy Kerr
Reviewed-by: Eddie James
Tested-by: Eddie James
Link: https://lore.kernel.org/r/20210223041737.171274-1-joel@jms.id.au
Signed-off-by: Joel Stanley -
Currently the cfam_read and cfam_write functions return the provided
number of bytes given in the count parameter and not the error return
code in variable rc, hence all failures of read/writes are being
silently ignored. Fix this by returning the error code in rc.Addresses-Coverity: ("Unused value")
Fixes: d1dcd6782576 ("fsi: Add cfam char devices")
Signed-off-by: Colin Ian King
Reviewed-by: Jeremy Kerr
Link: https://lore.kernel.org/r/20210603122812.83587-1-colin.king@canonical.com
Signed-off-by: Joel Stanley -
This patch adds missing MODULE_DEVICE_TABLE definition which generates
correct modalias for automatic loading of this driver when it is built
as an external module.Reported-by: Hulk Robot
Signed-off-by: Zou Wei
Link: https://lore.kernel.org/r/1620896249-52769-1-git-send-email-zou_wei@huawei.com
Signed-off-by: Joel Stanley
16 Dec, 2020
1 commit
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Pull hwmon updates from Guenter Roeck:
"New drivers:
- SB-TSI sensors
- Lineat Technology LTC2992
- Delta power supplies Q54SJ108A2
- Maxim MAX127
- Corsair PSU
- STMicroelectronics PM6764 Voltage RegulatorNew chip support:
- P10 added to fsi/occ driver
- NCT6687D added to nct6883 driver
- Intel-based Xserves added to applesmc driver
- AMD family 19h model 01h added to amd_energy driverAnd various minor bug fixes and improvements"
* tag 'hwmon-for-v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging: (41 commits)
dt-bindings: (hwmon/sbtsi_temp) Add SB-TSI hwmon driver bindings
hwmon: (sbtsi) Add documentation
hwmon: (sbtsi) Add basic support for SB-TSI sensors
hwmon: (iio_hwmon) Drop bogus __refdata annotation
hwmon: (xgene) Drop bogus __refdata annotation
dt-bindings: hwmon: convert AD ADM1275 bindings to dt-schema
hwmon: (occ) Add new temperature sensor type
fsi: occ: Add support for P10
dt-bindings: fsi: Add P10 OCC device documentation
dt-bindings: hwmon: convert TI ADS7828 bindings to dt-schema
dt-bindings: hwmon: convert AD AD741x bindings to dt-schema
dt-bindings: hwmon: convert TI INA2xx bindings to dt-schema
hwmon: (ltc2992) Fix less than zero comparisons with an unsigned integer
hwmon: (pmbus/q54sj108a2) Correct title underline length
dt-bindings: hwmon: Add documentation for ltc2992
hwmon: (ltc2992) Add support for GPIOs.
hwmon: (ltc2992) Add support
hwmon: (pmbus) Driver for Delta power supplies Q54SJ108A2
hwmon: Add driver for STMicroelectronics PM6764 Voltage Regulator
hwmon: (nct6683) Support NCT6687D.
...
11 Dec, 2020
1 commit
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The P10 OCC has a different SRAM address for the command and response
buffers. In addition, the SBE commands to access the SRAM have changed
format. Add versioning to the driver to handle these differences.Signed-off-by: Eddie James
Reviewed-by: Joel Stanley
Signed-off-by: Joel Stanley
Link: https://lore.kernel.org/r/20201120010315.190737-3-joel@jms.id.au
Signed-off-by: Guenter Roeck
10 Dec, 2020
1 commit
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There is nothing to prevent multiple commands being executed
simultaneously. Add a mutex to prevent this.Fixes: 606397d67f41 ("fsi: Add ast2600 master driver")
Reviewed-by: Joel Stanley
Reviewed-by: Milton Miller
Signed-off-by: Eddie James
Signed-off-by: Joel Stanley
Link: https://lore.kernel.org/r/20201120004929.185239-1-joel@jms.id.au
Signed-off-by: Greg Kroah-Hartman
10 Sep, 2020
14 commits
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Systems have a line for restting the remote CFAM. This is not part of
the FSI master, but is associated with it, so it makes sense to include
it in the master driver.This exposes a sysfs interface to reset the cfam, abstracting away the
direction and polarity of the GPIO, as well as the timing of the reset
pulse. Userspace will be blocked until the reset pulse is finished.The reset is hard coded to be in the range of (900, 1000) us. It was
observed with a scope to regularly be just over 1ms.If the device tree property is not preset the driver will silently
continue.Reviewed-by: Andrew Jeffery
Link: https://lore.kernel.org/r/20200728025527.174503-6-joel@jms.id.au
Signed-off-by: Joel Stanley -
For testing and hardware debugging a user may wish to override the
divisor at runtime. By setting fsi_master_aspeed.bus_div=N, the divisor
will be set to N, if 0 < N
Link: https://lore.kernel.org/r/20200728025527.174503-5-joel@jms.id.au
Signed-off-by: Joel Stanley -
Testing of Tacoma has shown that the ASPEED master can be run at maximum
speed.The exception is when wired externally with a cable, in which case we
use a divisor of two to ensure reliable operation.Reviewed-by: Eddie James
Link: https://lore.kernel.org/r/20200728025527.174503-4-joel@jms.id.au
Signed-off-by: Joel Stanley -
Some FSI capable systems have internal FSI signals, and some have
external cabled FSI. Software can detect which machine this is by
reading a jumper GPIO, and also control which pins the signals are
routed to through a mux GPIO.This attempts to find the GPIOs at probe time. If they are not present
in the device tree the driver will not error and continue as before.The mux GPIO is owned by the FSI driver to ensure it is not modified at
runtime. The routing jumper obtained as non-exclusive to allow other
software to inspect it's state.Reviewed-by: Andrew Jeffery
Link: https://lore.kernel.org/r/20200728025527.174503-3-joel@jms.id.au
Signed-off-by: Joel Stanley -
The only usage of scom_ids is to assign its address to the id_table
field in the fsi_driver struct, which is a const pointer, so make it
const to allow the compiler to put it in read-only memorySigned-off-by: Rikard Falkeborn
Signed-off-by: Joel Stanley -
The only usage of sbefifo_ids is to assign its address to the id_table
field in the fsi_driver struct, which is a const pointer, so make it
const to allow the compiler to put it in read-only memorySigned-off-by: Rikard Falkeborn
Signed-off-by: Joel Stanley -
The only usage of hub_master_ids is to assign its address to the
id_table field in the fsi_driver struct, which is a const pointer, so
make it const to allow the compiler to put it in read-only memory.Signed-off-by: Rikard Falkeborn
Signed-off-by: Joel Stanley -
Both the Aspeed and hub masters read back the link enable register
after enabling the link, but this is unnecessary, so remove it.Signed-off-by: Eddie James
Signed-off-by: Joel Stanley -
The driver ought to claim local bus ownership of the slave it's
communicating with.This is for multi-master setups. The slave (in theory) will deny access
to masters who try to access the CFAM address space but who don't "own"
the bus.As driver doesn't seem to perform any other teardown there is no need to
"un-claim" ownership at teardown. Also I'm not aware of any multi-master
setup using this driver so it shouldn't actually matter. Also, the
hardware doesn't seem to enforce this despite being required in the
specification...Signed-off-by: Eddie James
Signed-off-by: Joel Stanley -
In the case that links don't have slaves or fail to be accessed, the
master should disable the link during the scan since it won't be using
the slave.Signed-off-by: Eddie James
Signed-off-by: Joel Stanley -
Add the ability to disable a link with a boolean parameter to the
link_enable function. This is necessary so that the master can disable
links that it isn't using; for example, links to slaves that fail
initialization.Signed-off-by: Eddie James
Signed-off-by: Joel Stanley -
In case of error, the function platform_device_register_full()
returns ERR_PTR() and never returns NULL. The NULL test in the
return value check should be replaced with IS_ERR().Signed-off-by: Xu Wang
Reviewed-by: Guenter Roeck
Signed-off-by: Joel Stanley -
In order to access more than the second hub link, 23-bit addressing is
required. The core provides the highest two bits of address as the slave
ID to the master.Signed-off-by: Eddie James
Acked-by: Jeremy Kerr
Signed-off-by: Joel Stanley -
There is a spelling mistake in a dev_err error message. Fix it.
Signed-off-by: Colin Ian King
Reviewed-by: Andrew Jeffery
Signed-off-by: Joel Stanley
14 Jun, 2020
1 commit
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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
11 Feb, 2020
1 commit
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Currently CONFIG_FSI_MASTER_ASPEED=y implicitly depends on
CONFIG_HAS_IOMEM=y; consequently, on architectures without IOMEM we get
the following build error:ld: drivers/fsi/fsi-master-aspeed.o: in function `fsi_master_aspeed_probe':
drivers/fsi/fsi-master-aspeed.c:436: undefined reference to `devm_ioremap_resource'Fix the build error by adding the unspecified dependency.
Fixes: 606397d67f41 ("fsi: Add ast2600 master driver")
Cc: stable@vger.kernel.org
Reported-by: Brendan Higgins
Signed-off-by: Brendan Higgins
Reviewed-by: Joel Stanley
Signed-off-by: Joel Stanley
Link: https://lore.kernel.org/r/20200131034832.294268-1-joel@jms.id.au
Signed-off-by: Greg Kroah-Hartman
08 Nov, 2019
5 commits
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The data byte order selection registers in the APB2OPB primarily expose some
internal plumbing necessary to get correct write accesses onto the OPB.
OPB write cycles require "data mirroring" across the 32-bit data bus to
support variable data width slaves that don't implement "byte enables".
For slaves that do implement byte enables the master can signal which
bytes on the data bus the slave should consider valid.The data mirroring behaviour is specified by the following table:
+-----------------+----------+-----------------------------------+
| | | 32-bit Data Bus |
+---------+-------+----------+---------+---------+-------+-------+
| | | | | | | |
| ABus | Mn_BE | Request | Dbus | Dbus | Dbus | Dbus |
| (30:31) | (0:3) | Transfer | 0:7 | 8:15 | 16:23 | 24:31 |
| | | Size | byte0 | byte1 | byte2 | byte3 |
+---------+-------+----------+---------+---------+-------+-------+
| 00 | 1111 | fullword | byte0 | byte1 | byte2 | byte3 |
+---------+-------+----------+---------+---------+-------+-------+
| 00 | 1110 | halfword | byte0 | byte1 | byte2 | |
+---------+-------+----------+---------+---------+-------+-------+
| 01 | 0111 | byte | _byte1_ | byte1 | byte2 | byte3 |
+---------+-------+----------+---------+---------+-------+-------+
| 00 | 1100 | halfword | byte0 | byte1 | | |
+---------+-------+----------+---------+---------+-------+-------+
| 01 | 0110 | byte | _byte1_ | byte1 | byte2 | |
+---------+-------+----------+---------+---------+-------+-------+
| 10 | 0011 | halfword | _byte2_ | _byte3_ | byte2 | byte3 |
+---------+-------+----------+---------+---------+-------+-------+
| 00 | 1000 | byte | byte0 | | | |
+---------+-------+----------+---------+---------+-------+-------+
| 01 | 0100 | byte | _byte1_ | byte1 | | |
+---------+-------+----------+---------+---------+-------+-------+
| 10 | 0010 | byte | _byte2_ | | byte2 | |
+---------+-------+----------+---------+---------+-------+-------+
| 11 | 0001 | byte | _byte3_ | _byte3_ | | byte3 |
+---------+-------+----------+---------+---------+-------+-------+Mirrored data values are highlighted by underscores in the Dbus columns.
The values in the ABus and Request Transfer Size columns correspond to
values in the field names listed in the write data order select register
descriptions.Similar configuration registers are exposed for reads which enables the
secondary purpose of configuring hardware endian conversions. It appears the
data bus byte order is switched around in hardware so set the registers such
that we can access the correct values for all widths. The values were
determined by experimentation on hardware against fixed CFAM register
values to configure the read data order, then in combination with the
table above and the register layout documentation in the AST2600
datasheet performing write/read cycles to configure the write data order
registers.Signed-off-by: Andrew Jeffery
Signed-off-by: Joel Stanley
Acked-by: Alistair Popple
Link: https://lore.kernel.org/r/20191108051945.7109-12-joel@jms.id.au
Signed-off-by: Greg Kroah-Hartman -
These trace points help with debugging the FSI master. They show the low
level reads, writes and error states of the master.Signed-off-by: Joel Stanley
Link: https://lore.kernel.org/r/20191108051945.7109-11-joel@jms.id.au
Signed-off-by: Greg Kroah-Hartman -
The ast2600 BMC has a pair of FSI masters in it, behind an AHB to OPB
bridge.The master driver supports reads and writes of full words, half word and
byte accesses to remote CFAMs. It can perform very basic error recovery
through resetting of the FSI port when an error is detected, and the
issuing of breaks and terms.Signed-off-by: Joel Stanley
Acked-by: Alistair Popple
--
v2:
- remove debugging
- squash in fixes
Link: https://lore.kernel.org/r/20191108051945.7109-10-joel@jms.id.au
Signed-off-by: Greg Kroah-Hartman -
The FSI master registers are common to the hub and AST2600 master (and
the FSP2, if someone was to upstream a driver for that).Add defines to the fsi-master.h header, and introduce headings to
delineate the existing low level details.Acked-by: Andrew Jeffery
Acked-by: Jeremy Kerr
Signed-off-by: Joel Stanley
Link: https://lore.kernel.org/r/20191108051945.7109-8-joel@jms.id.au
Signed-off-by: Greg Kroah-Hartman -
There are no users outside of this file.
Fixes: 0604d53d4da8 ("fsi: Add fsi-master class")
Signed-off-by: kbuild test robot
Signed-off-by: Joel Stanley
Link: https://lore.kernel.org/r/20191108051945.7109-7-joel@jms.id.au
Signed-off-by: Greg Kroah-Hartman
