Chin Liang See [Tue, 10 Jun 2014 07:23:45 +0000 (02:23 -0500)]
socfpga: Relocate arch common functions away from board
To move the arch common function away from board folder to
arch/arm/cpu/armv7/socfpga folder. Its to avoid code duplication
for other non Altera dev kit which is using socfpga device.
Signed-off-by: Chin Liang See <clsee@altera.com> Cc: Wolfgang Denk <wd@denx.de> Cc: Detlev Zundel <dzu@denx.de> Cc: Pavel Machek <pavel@denx.de> Cc: Dinh Nguyen <dinguyen@altera.com> Acked-by: Detlev Zundel <dzu@denx.de>
Linus Walleij [Mon, 23 Jun 2014 09:15:16 +0000 (11:15 +0200)]
integrator: switch to generic board
Turn on generic board for the integrators, as per the request in
the startup message. Everything just works, tested on the
Integrator/AP and Integrator/CP.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Simon Glass <sjg@chromium.org>
Chin Liang See [Tue, 10 Jun 2014 06:17:42 +0000 (01:17 -0500)]
socfpga: Adding Scan Manager driver
Scan Manager driver will be called to configure the IOCSR
scan chain. This configuration will setup the IO buffer settings
Signed-off-by: Chin Liang See <clsee@altera.com> Cc: Dinh Nguyen <dinguyen@altera.com> Cc: Wolfgang Denk <wd@denx.de> CC: Pavel Machek <pavel@denx.de> Cc: Tom Rini <trini@ti.com> Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Chin Liang See [Tue, 10 Jun 2014 06:10:21 +0000 (01:10 -0500)]
watchdog/denali: Adding DesignWare watchdog driver support
To add the DesignWare watchdog driver support. It required
information such as register base address and clock info from
configuration header file within include/configs folder.
Signed-off-by: Chin Liang See <clsee@altera.com> Cc: Anatolij Gustschin <agust@denx.de> Cc: Albert Aribaud <albert.u.boot@aribaud.net> Cc: Heiko Schocher <hs@denx.de> Cc: Tom Rini <trini@ti.com>
In current gpio_set_value() implementation, it always sets the gpio control bit
no matter the value argument is 0 or 1. Thus the GPIOs never set to low.
This patch fixes this bug.
The address bus is used as a mask on read/write operations, so that independent
software drivers can set their GPIO bits without affecting any other pins in a
single write operation. Thus we don't need a read-modify-write to update the
register.
Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by: Stefan Roese <sr@denx.de> Reviewed-by: Vipin Kumar <vipin.kumar@st.com> Reviewed-by: Michael Trimarchi <michael@amarulasolutions.com>
York Sun [Mon, 23 Jun 2014 22:15:56 +0000 (15:15 -0700)]
ARMv8/ls2085a_emu: Add LS2085A emulator and simulator board support
LS2085A is an ARMv8 implementation. This adds board support for emulator
and simulator:
Two DDR controllers
UART2 is used as the console
IFC timing is tightened for speedy booting
Support DDR3 and DDR4 as separated targets
Management Complex (MC) is enabled
Support for GIC 500 (based on GICv3 arch)
Signed-off-by: York Sun <yorksun@freescale.com> Signed-off-by: Arnab Basu <arnab.basu@freescale.com> Signed-off-by: J. German Rivera <German.Rivera@freescale.com> Signed-off-by: Bhupesh Sharma <bhupesh.sharma@freescale.com>
J. German Rivera [Mon, 23 Jun 2014 22:15:55 +0000 (15:15 -0700)]
armv8/fsl-lsch3: Add support to load and start MC Firmware
Adding support to load and start the Layerscape Management Complex (MC)
firmware. First, the MC GCR register is set to 0 to reset all cores. MC
firmware and DPL images are copied from their location in NOR flash to
DDR. MC registers are updated with the location of these images.
Deasserting the reset bit of MC GCR register releases core 0 to run.
Core 1 will be released by MC firmware. Stop bits are not touched for
this step. U-boot waits for MC until it boots up. In case of a failure,
device tree is updated accordingly. The MC firmware image uses FIT format.
Signed-off-by: J. German Rivera <German.Rivera@freescale.com> Signed-off-by: York Sun <yorksun@freescale.com> Signed-off-by: Lijun Pan <Lijun.Pan@freescale.com> Signed-off-by: Shruti Kanetkar <Shruti@Freescale.com>
York Sun [Mon, 23 Jun 2014 22:15:54 +0000 (15:15 -0700)]
ARMv8/FSL_LSCH3: Add FSL_LSCH3 SoC
Freescale LayerScape with Chassis Generation 3 is a set of SoCs with
ARMv8 cores and 3rd generation of Chassis. We use different MMU setup
to support memory map and cache attribute for these SoCs. MMU and cache
are enabled very early to bootst performance, especially for early
development on emulators. After u-boot relocates to DDR, a new MMU
table with QBMan cache access is created in DDR. SMMU pagesize is set
in SMMU_sACR register. Both DDR3 and DDR4 are supported.
Signed-off-by: York Sun <yorksun@freescale.com> Signed-off-by: Varun Sethi <Varun.Sethi@freescale.com> Signed-off-by: Arnab Basu <arnab.basu@freescale.com>
Darwin Rambo [Mon, 9 Jun 2014 18:12:59 +0000 (11:12 -0700)]
arm: Add support for semihosting for armv8 fastmodel targets.
The armv8 ARM Trusted Firmware (ATF) can be used to load various ATF
images and u-boot, and does this for virtual platforms by using
semihosting. This commit extends this idea by allowing u-boot to also
use semihosting to load the kernel/ramdisk/dtb. This eliminates the need
for a bootwrapper and produces a more realistic boot sequence with
virtual models.
Though the semihosting code is quite generic, support for armv7 in
fastmodel is less useful due to the wide range of available silicon
and the lack of a free armv7 fastmodel, so this change contains an
untested armv7 placeholder for the service trap opcode.
Please refer to doc/README.semihosting for a more detailed description
of semihosting and how it is used with the armv8 virtual platforms.
Signed-off-by: Darwin Rambo <drambo@broadcom.com> Cc: trini@ti.com Cc: fenghua@phytium.com.cn Cc: bhupesh.sharma@freescale.com
Stephen Warren [Tue, 1 Jul 2014 20:22:27 +0000 (14:22 -0600)]
usb: ci_udc: use var name ep/ci_ep consistently
Almost all of ci_udc.c uses variable name "ep" for a struct usb_ep and
"ci_ep" for a struct ci_ep. This is nice and consistent, and helps people
know what type a variable is without searching for the declaration.
handle_ep_complete() doesn't do this, so fix it to be consistent.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Stephen Warren [Tue, 1 Jul 2014 22:59:08 +0000 (16:59 -0600)]
USB: gadget: atmel: zero out allocated requests
A UDC's alloc_request method should zero out the newly allocated request.
Ensure the Atmel driver does so. This issue was found by code inspection,
following the investigation of an intermittent issue with ci_udc, which
was tracked down to failing to zero out allocated requests following some
of my changes. All other UDC drivers already zero out requests in one
way or another.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
struct ci_req is a purely software structure, and needs no specific
memory alignment. Hence, allocate it with calloc() rather than
memalign(). The use of memalign() was left-over from when struct ci_req
was going to hold the aligned bounce buffer, but this is now dynamically
allocated.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Stephen Warren [Tue, 1 Jul 2014 17:41:17 +0000 (11:41 -0600)]
usb: ci_udc: remove controller.items array
There's no need to store an array of QTD pointers in the controller.
Since the calculation is so simple, just have ci_get_qtd() perform it
at run-time, rather than pre-calculating everything.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
2 QTDs are allocated for each EP. The current allocation scheme aligns
the first QTD in each pair, but simply adds the struct size to calculate
the second QTD's address. This will result in a non-cache-aligned
addresss IF the system's ARCH_DMA_MINALIGN is not 32 bytes (i.e. the
size of struct ept_queue_item).
Similarly, the original ilist_ent_sz calculation aligned the value to
ARCH_DMA_MINALIGN but didn't take the USB HW's 32-byte alignment
requirement into account. This doesn't cause a practical issue unless
ARCH_DMA_MINALIGN < 32 (which I suspect is quite unlikely), but we may
as well fix the code to be explicit, so it's obviously completely
correct.
The new value of ILIST_ENT_SZ takes all alignment requirements into
account, so we can simplify ci_{flush,invalidate}_qtd() by simply using
that macro rather than calling roundup().
Similarly, the calculation of controller.items[i] can be simplified,
since each QTD is evenly spaced at its individual alignment requirement,
rather than each pair being aligned, and entries within the pair being
spaced apart only by structure size.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Stephen Warren [Tue, 1 Jul 2014 17:41:15 +0000 (11:41 -0600)]
usb: ci_udc: lift ilist size calculations to global scope
This will allow functions other than ci_udc_probe() to make use of the
constants in a future change.
This in turn requires converting the const int variables to #defines,
since the initialization of one global const int can't depend on the
value of another const int; the compiler thinks it's non-constant if
that dependency exists.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Stephen Warren [Tue, 1 Jul 2014 17:41:14 +0000 (11:41 -0600)]
usb: ci_udc: don't assume QTDs are adjacent when transmitting ZLPs
Fix ci_ep_submit_next_request()'s ZLP transmission code to explicitly
call ci_get_qtd() to find the address of the other QTD to use. This
will allow us to correctly align each QTD individually in the future,
which may involve leaving a gap between the QTDs.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Stephen Warren [Tue, 1 Jul 2014 17:41:13 +0000 (11:41 -0600)]
usb: ci_udc: fix ci_flush_{qh,qtd} calls in ci_udc_probe()
ci_udc_probe() initializes a pair of QHs and QTDs for each EP. After
each pair has been initialized, the pair is cache-flushed. The
conversion from QH/QTD index [0..2*NUM_END_POINTS) to EP index
[0..NUM_ENDPOINTS] is incorrect; it simply subtracts 1 (which yields
the QH/QTD index of the first entry in the pair) rather than dividing
by two (which scales the range). Fix this.
On my system, this avoids cache debug prints due to requests to flush
unaligned ranges. This is caused because the flush calls happen before
the items[] array entries are initialized for all but EP0.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Stephen Warren [Tue, 10 Jun 2014 16:06:41 +0000 (10:06 -0600)]
dfu: free entities when parsing fails
When dfu_init_env_entities() fails part-way through, some entities may
have been added to dfu_list. These are only removed by dfu_free_entities().
If that function isn't called, those stale entities will still exist the
next time dfu_init_env_entities() is called, leading to confusion. Fix
do_dfu() to ensure that dfu_free_entities() is always called, to avoid
this confusion.
Jeroen Hofstee [Fri, 13 Jun 2014 22:57:14 +0000 (00:57 +0200)]
usb: fastboot: fix potential buffer overflow
cb_getvar tries to prevent overflowing the response buffer
by using strncat. But strncat takes the number of data bytes
copied as a limit not the total buffer length so it can still
overflow. Pass the correct value instead.
cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
cc: Rob Herring <robh@kernel.org> Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>
Jeroen Hofstee [Wed, 11 Jun 2014 22:31:27 +0000 (00:31 +0200)]
usb: xhci: (likely) fix bracket in if condition
Because of the brackets the & and && is evaluated before
the comparison. This is likely not the intention. Change
it to test the first and second condition to both be true.
cc: Marek Vasut <marex@denx.de> Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>
Jeroen Hofstee [Mon, 9 Jun 2014 13:28:58 +0000 (15:28 +0200)]
usb:g_dnl:f_thor: remove memset before memcpy
since ALLOC_CACHE_ALIGN_BUFFER defines a pointer and not a
buffer, the memset with sizeof(rqt) likely does something else
then intended. Since there is a memcpy directly after it with
the full size, drop the memset completely.
usb: r8a66597: Fix initilization size of r8a66597 info structure
Initialization of r8a66597 info structure is not enough.
Because initilization was used size of pointer.
This fixes that use size of r8a6659 info structure.
usb: r8a66597: Fix initialization hub that using R8A66597_MAX_ROOT_HUB
This driver is processed as two USB hub despite one.
The number of root hub is defined in R8A66597_MAX_ROOT_HUB.
This fixes that register is accessed by using the definition
of R8A66597_MAX_ROOT_HUB.
Stephen Warren [Mon, 23 Jun 2014 18:02:48 +0000 (12:02 -0600)]
usb: ci_udc: fix interaction with CONFIG_USB_ETH_CDC
ci_udc.c's usb_gadget_unregister_driver() doesn't call driver->unbind()
unlike other USB gadget drivers. Fix it to do this.
Without this, when ether.c's CDC Ethernet device is torn down,
eth_unbind() is never called, so dev->gadget is never set to NULL.
For some reason, usb_eth_halt() is called both at the end of the first
use of the Ethernet device, and prior to any subsequent use. Since
dev->gadget is never cleared, all calls to usb_eth_halt() attempt to
stop, disconnect, and clean up the device, resulting in double cleanup,
which hangs U-Boot on my Tegra device at least.
ci_udc allocates its own singleton EP0 request object, and cleans it up
during usb_gadget_unregister_driver(). This appears necessary when using
the USB gadget framework in U-Boot, since that does not allocate/free
the EP0 request. However, the CDC Ethernet driver *does* allocate and
free its own EP0 requests. Consequently, we must protect
ci_ep_free_request() against double-freeing the request.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Masahiro Yamada [Thu, 12 Jun 2014 03:26:15 +0000 (12:26 +0900)]
sandbox: change local_irq_save() to macro
local_irq_save() should be a macro, not a function
because local_irq_save() saves flag to the given argument.
GCC is silent about this issue, but Clang warns:
In file included from lib/asm-offsets.c:15:
In file included from include/common.h:20:
In file included from include/linux/bitops.h:110:
arch/sandbox/include/asm/bitops.h:59:17:
warning: variable 'flags' is uninitialized when used here
[-Wuninitialized]
local_irq_save(flags);
^~~~~
That change causes another warning:
In file included from include/linux/bitops.h:110:0,
from include/common.h:20,
from lib/asm-offsets.c:15:
arch/sandbox/include/asm/bitops.h: In function ‘test_and_set_bit’:
arch/sandbox/include/asm/bitops.h:56:16: warning: unused variable ‘flags’ [-Wunused-variable]
So, flags should be set to __always_unused.
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Cc: Simon Glass <sjg@chromium.org> Cc: Jeroen Hofstee <jeroen@myspectrum.nl> Acked-by: Simon Glass <sjg@chromium.org> Acked-by: Jeroen Hofstee <jeroen@myspectrum.nl>
Stephen Warren [Wed, 11 Jun 2014 16:26:23 +0000 (10:26 -0600)]
sandbox: terminate os_dirent_ls() result list
Each node in the linked-list that os_dirent_ls() returns has its next
pointer set only when the next node is created. For the last node in the
list, there is no next node, so this never happens, and the next pointer
is never initialized. Explicitly initialize the next pointer so that it
isn't dangling. Without this, "sb ls" might crash.
Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Simon Glass <sjg@chromium.org>
Stephen Warren [Thu, 12 Jun 2014 16:28:32 +0000 (10:28 -0600)]
sandbox: restore ability to access host fs through standard commands
Commit 95fac6ab4589 "sandbox: Use os functions to read host device tree"
removed the ability for get_device_and_partition() to handle the "host"
device type, and redirect accesses to it to the host filesystem. This
broke some unit tests that use this feature. So, revert that change. The
code added back by this patch is slightly different to pacify checkpatch.
However, we're then left with "host" being both:
- A pseudo device that accesses the hosts real filesystem.
- An emulated block device, which accesses "sectors" inside a file stored
on the host.
In order to resolve this discrepancy, rename the pseudo device from host
to hostfs, and adjust the unit-tests for this change.
The "help sb" output is modified to reflect this rename, and state where
the host and hostfs devices should be used.
Signed-off-by: Stephen Warren <swarren@nvidia.com> Tested-by: Josh Wu <josh.wu@atmel.com> Acked-by: Simon Glass <sjg@chromium.org> Tested-by: Simon Glass <sjg@chromium.org>
Vasili Galka [Tue, 10 Jun 2014 13:14:56 +0000 (16:14 +0300)]
x86: Enable 32-bit build using x86_64 multilib toolchain
Until now building the x86 arch boards required 32-bit toolchain. As
many x86_64 toolchains come with 32-bit support (multilib) that's a
good idea to enable build with such toolchains.
The change required was to specify the usage of 32-bit explicitly to
the compiler and the linker (-m32 and -m elf_i386 flags) and locate
the right libgcc path.
Signed-off-by: Vasili Galka <vvv444@gmail.com> Acked-by: Simon Glass <sjg@chromium.org>
Heiko Schocher [Sun, 22 Jun 2014 04:33:29 +0000 (06:33 +0200)]
lib, fdt: move fdtdec_get_int() out of lib/fdtdec.c
move fdtdec_get_int() out of lib/fdtdec.c into lib/fdtdec_common.c
as this function is also used, if CONFIG_OF_CONTROL is not
used. Poped up on the ids8313 board using signed FIT images,
and activating CONFIG_SYS_GENERIC_BOARD. Without this patch
it shows on boot:
No valid FDT found - please append one to U-Boot binary, use u-boot-dtb.bin or define CONFIG_OF_EMBED. For sandbox, use -d <file.dtb>
With this patch, it boots again with CONFIG_SYS_GENERIC_BOARD
enabled.
Signed-off-by: Heiko Schocher <hs@denx.de> Acked-by: Simon Glass <sjg@chromium.org> Cc: Tom Rini <trini@ti.com>
Jeroen Hofstee [Wed, 18 Jun 2014 20:13:52 +0000 (22:13 +0200)]
PMIC: MAX77686: fix invalid bus check
Since p->bus is unsigned checking for negative values
is optimized away. Since bus is already used as an argument
use tmp. While at it, don't declare variables in the middle
of a function.
Michael Pratt [Wed, 18 Jun 2014 12:24:02 +0000 (17:54 +0530)]
Exynos: Split 5250 and 5420 memory bank configuration
Since snow has a different memory configuration than peach, split the
configuration between the 5250 and 5420. Exynos 5420 supports runtime
memory configuration detection, and can make the determination between 4
and 7 banks at runtime.
Include the bank size with the number of banks for context to make the
number of banks meaningful.
Signed-off-by: Michael Pratt <mpratt@chromium.org> Signed-off-by: Akshay Saraswat <akshay.s@samsung.com> Acked-by: Simon Glass <sjg@chromium.org> Tested-by: Simon Glass <sjg@chromium.org> Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
Akshay Saraswat [Wed, 18 Jun 2014 12:24:01 +0000 (17:54 +0530)]
Exynos5: Config: Enable USB boot mode for all Exynos5 SoCs
Right now USB booting is enabled for Exynos5250 only. Moving all the
configs for USB boot mode from exynos5250-dt.h to exynos5-dt.h in order
to enableUSB booting for all Exynos5 SoCs.
Signed-off-by: Akshay Saraswat <akshay.s@samsung.com> Acked-by: Simon Glass <sjg@chromium.org> Tested-by: Simon Glass <sjg@chromium.org> Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
Akshay Saraswat [Wed, 18 Jun 2014 12:24:00 +0000 (17:54 +0530)]
Exynos5: Config: Increase SPL footprint for Exynos5420
Max footprint for SPL in both Exynos 5250 and 5420 is limited to 14 KB.
For Exynos5250 we need to keep it 14 KB because BL1 supports only fixed
size SPL downloading. But in case of Exynos5420 we need not restrict it
to 14 KB. And also, the SPL size for Exynos5420 is expected to increase
with the upcoming patches and the patches under review right now.
Signed-off-by: Akshay Saraswat <akshay.s@samsung.com> Acked-by: Simon Glass <sjg@chromium.org> Tested-by: Simon Glass <sjg@chromium.org> Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
Akshay Saraswat [Wed, 18 Jun 2014 12:23:59 +0000 (17:53 +0530)]
Exynos5: Config: Place environment at the end of SPI flash
Currently environment resides at the location where BL2 ends.
This may hold good in case there is an empty space at this
position. But what if this place already has a binary or is
expected to have one. To avoid such scenarios it is better
to save environment at the end of the flash.
Signed-off-by: Akshay Saraswat <akshay.s@samsung.com> Acked-by: Simon Glass <sjg@chromium.org> Tested-by: Simon Glass <sjg@chromium.org> Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
Akshay Saraswat [Wed, 18 Jun 2014 12:23:58 +0000 (17:53 +0530)]
Exynos5420: Introduce support for the Peach-Pit board
While the Exynos5420 chip is used in both Smdk5420 and in the Peach-Pit
line of devices, there could be other boards using the same chip, so a
common configuration file is being added (exynos5420.h) as well
as two common device tree files (exynos54xx.dtsi & exynos5420.dtsi).
The peach board as declared in boards.cfg is a copy of smdk5420
declaration. The configuration files are similar, but define different
default device trees, console serial ports and prompts.
The device tree files for smdk5420 and peach-pit inherit from the same
common file.
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org> Signed-off-by: Akshay Saraswat <akshay.s@samsung.com> Acked-by: Simon Glass <sjg@chromium.org> Tested-by: Simon Glass <sjg@chromium.org> Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
Akshay Saraswat [Wed, 18 Jun 2014 12:23:57 +0000 (17:53 +0530)]
Exynos5420: Let macros be used for exynos5420
Macros defined in exynos5_setup.h specific to SMDK5420
are required for Peach-Pit too. Hence, replacing
CONFIG_SMDK5420 with CONFIG_EXYNOS5420 to enable these
macros for all the boards based on Exynos5420.
Signed-off-by: Akshay Saraswat <akshay.s@samsung.com> Acked-by: Simon Glass <sjg@chromium.org> Tested-by: Simon Glass <sjg@chromium.org> Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
Akshay Saraswat [Wed, 18 Jun 2014 12:22:41 +0000 (17:52 +0530)]
Exynos: SPI: Fix reading data from SPI flash
SPI recieve and transfer code in exynos_spi driver has a logical bug.
We read data in a variable which can hold an integer. Then we assign
this integer 32 bit value to another variable which has data type uchar.
Latter represents a unit of our recieve buffer. Everytime when we write
a value to our recieve buffer we step ahead by 4 units when actually we
wrote to one unit. This results in the loss of 3 bytes out of every 4
bytes recieved. This patch intends to fix this bug.
Signed-off-by: Akshay Saraswat <akshay.s@samsung.com> Acked-by: Simon Glass <sjg@chromium.org> Tested-by: Simon Glass <sjg@chromium.org> Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
Simon Glass [Thu, 12 Jun 2014 05:29:54 +0000 (23:29 -0600)]
dm: Tidy up four minor code nits
There is a spelling mistake and two functions are missing comments
altogether. Also the flags declaration is correct, but doesn't follow
style. Finally, the uclass_get_device() function has some errors in
its documentation.
Fix these problems.
Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Marek Vasut <marex@denx.de>
Simon Glass [Thu, 12 Jun 2014 05:29:41 +0000 (23:29 -0600)]
Add an I/O tracing feature
When debugging drivers it is useful to see what I/O accesses were done
and in what order.
Even if the individual accesses are of little interest it can be useful to
verify that the access pattern is consistent each time an operation is
performed. In this case a checksum can be used to characterise the operation
of a driver. The checksum can be compared across different runs of the
operation to verify that the driver is working properly.
In particular, when performing major refactoring of the driver, where the
access pattern should not change, the checksum provides assurance that the
refactoring work has not broken the driver.
Add an I/O tracing feature and associated commands to provide this facility.
It works by sneaking into the io.h heder for an architecture and redirecting
I/O accesses through its tracing mechanism.
For now no commands are provided to examine the trace buffer. The format is
fairly simple, so 'md' is a reasonable substitute.
Note: The checksum feature is only useful for I/O regions where the contents
do not change outside of software control. Where this is not suitable you can
fall back to manually comparing the addresses. It might be useful to enhance
tracing to only checksum the accesses and not the data read/written.
Ash Charles [Tue, 10 Jun 2014 19:02:36 +0000 (12:02 -0700)]
omap3: overo: Select fdtfile for expansion board
The u-boot Overo board actually supports both Overo (OMAP35xx)
and Overo Storm (AM/DM37xx) COMs with a range of different expansion
boards. This provides a mechanism to select the an appropriate device
tree file based on the processor version and, if available, the
expansion board ID written on the expansion board EEPROM. To match the
3.15+ kernels, fdtfile names have this format:
"omap3-overo[-storm]-<expansion board name>.dtb"
By default, we use "omap3-overo-storm-tobi.dtb".
Signed-off-by: Ash Charles <ashcharles@gmail.com>
Conflicts:
include/configs/omap3_overo.h
Stefano Babic [Tue, 17 Jun 2014 14:47:40 +0000 (16:47 +0200)]
OMAP: disable gpmc timeout safely for reenabling
gpmc timeout is disabled and the reset counter
is set to 0. However, if later a driver activates
the timeout setting the reset to a valid value,
the old reset value with zero is still valid
for the first access. In fact, the timeout block
loads the reset counter after a successful access.
Found on a am335x board with a FPGA connected
to the GPMC bus together with the NAND.
When the FPGA driver in kernel activates
the timeout, the system hangs at the first access
by the NAND driver.
Felipe Balbi [Tue, 10 Jun 2014 20:01:20 +0000 (15:01 -0500)]
board: ti: am43xx: add support for AM43xx Starter Kit
AM43xx Starter Kit is a new board based on
AM437x line of SoCs. Being a low-cost EVM and
small size EVM are intended to provide an entry
level development platform on a full fledged
Hardware System.
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