Commit graph

23569 commits

Author SHA1 Message Date
Matthias Fuchs
01a0c64762 common, env: Fix support for environment in i2c eeprom
When using CONFIG_SYS_I2C i2c needs to be initialized by
i2c_init_all(). This is done in some places but not in
eeprom_init().

Signed-off-by: Matthias Fuchs <matthias.fuchs@esd.eu>
2014-03-28 15:06:30 -04:00
Alexey Brodkin
17b0da8019 axs101: flush DMA buffer descriptors before DMA transactons starts
CPU sets DMA buffer descriptors with data required for inetrnal DMA such as:
 * Ownership of BD
 * Buffer size
 * Pointer to data buffer in memory

Then we need to make sure DMA engine of NAND controller gets proper data.
For this we flush buffer rescriptor.

Then we're  ready for DMA transaction.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>

Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Tom Rini <trini@ti.com>
2014-03-28 15:06:30 -04:00
Alexey Brodkin
a7b26dbb49 net/designware: align DMA buffer descriptors to D$ line
It's important to have ability to flush/invalidate each DMA buffer descriptor
individually to prevent incoherency of adjacent BDs.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>

Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Joe Hershberger <joe.hershberger@ni.com>
Cc: Vipin Kumar <vipin.kumar@st.com>
Cc: Stefan Roese <sr@denx.de>
Cc: Shiraz Hashim <shiraz.hashim@st.com>
Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>
Cc: Amit Virdi <amit.virdi@st.com>
Cc: Sonic Zhang <sonic.zhang@analog.com>
2014-03-28 15:06:30 -04:00
Jonghwa Lee
028d65fb92 Logo: TIZEN: Change booting logo size to official size.
Since TIZEN group has been used 450 X 140 bmp logo for lunchbox,
this patch tries to change the logo size from 500 X 150 to official size.
By reducing image size, we also save about 35KB.

To make row aligned 4 bytes, add 2 pixels to row. Therefore the real width
of image size is 452.

Signed-off-by: Jonghwa Lee <jonghwa3.lee@samsung.com>
Reviewed-by : Przemyslaw Marczak <p.marczak@samsung.com>
2014-03-28 15:06:30 -04:00
Marek Vasut
463bb19eeb spl: Fix guardian macros in spl.h
Fix the macros guarding the spl.h header for various platforms. Due to
a typo and a propagation of it, the macros went out-of-sync with their
ifdef check, so fix this.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Tom Rini <trini@ti.com>
2014-03-28 15:06:30 -04:00
Masahiro Yamada
254d68b601 kbuild: move asm-offsets.c from SoC directory to arch/$(ARCH)/lib
U-Boot has supported two kinds of asm-offsets.h.

One is generic for all architectures and its source is located at
./lib/asm-offsets.c.

The other is SoC specific and its source is under SoC directory.
The problem here is that only boards with SoC directory can use
the asm-offsets infrastructure.
Putting asm-offsets.c right under CPU directory does not work.

Now a new demand is coming. PowerPC folks want to use asm-offsets.
But no PowerPC boards have SoC directory.

It seems inconsistent that some boards add asm-offsets.c to SoC
directoreis and some to CPU directories.
It looks more reasonable to put asm-offsets.c under arch/$(ARCH)/lib.

This commit merges asm-offsets.c under SoC directories into
arch/$(ARCH)/lib/asm-offsets.c.

By the way, I doubt the necessity of some entries in asm-offsets.c.
I am leaving refactoring to the board maintainers.
Please check "TODO" in the comment blocks in
arch/{arm,nds32}/lib/asm-offsets.c.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Yuantian Tang <Yuantian.Tang@freescale.com>
2014-03-28 15:06:29 -04:00
Marek Vasut
b97241b312 kbuild: Rename UIMAGE to MKIMAGE
U-Boot uses the 'mkimage' tool to produce various image types,
not only uImage image type. Rename the invocation name from
UIMAGE to MKIMAGE.

The following command was used to do the replacement:
git grep 'quiet_cmd_mkimage.* = UIMAGE' | cut -d : -f 1 | \
 xargs -i sed -i "s@\(quiet_cmd_mkimage\)\(.*\) = UIMAGE @\1\2 = MKIMAGE@" {}

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Tom Rini <trini@ti.com>
Cc: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
2014-03-28 15:06:29 -04:00
Tom Rini
82b9547387 Merge branch 'master' of git://git.denx.de/u-boot-mmc 2014-03-28 08:24:01 -04:00
Tom Rini
81b196bed8 Merge branch 'master' of git://git.denx.de/u-boot-usb 2014-03-28 08:19:05 -04:00
Łukasz Majewski
eea4e6fe82 dfu: mmc: Replace calls to u-boot commands with native mmc API
For some time we have been using the run_command() with properly crafted
string. Such approach turned to be unreliable and error prone.

Switch to "native" mmc subsystem API would allow better type checking and
shall improve speed.

Also, it seems that this API is changing less often than u-boot commands.
The approach similar to env operations on the eMMC has been reused.

Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
2014-03-24 12:59:54 +02:00
Pantelis Antoniou
93bfd61677 mmc: Split mmc struct, rework mmc initialization (v2)
The way that struct mmc was implemented was a bit of a mess;
configuration and internal state all jumbled up in a single structure.

On top of that the way initialization is done with mmc_register leads
to a lot of duplicated code in drivers.

Typically the initialization got something like this in every driver.

	struct mmc *mmc = malloc(sizeof(struct mmc));
	memset(mmc, 0, sizeof(struct mmc);
	/* fill in fields of mmc struct */
	/* store private data pointer */
	mmc_register(mmc);

By using the new mmc_create call one just passes an mmc config struct
and an optional private data pointer like this:

	struct mmc = mmc_create(&cfg, priv);

All in tree drivers have been updated to the new form, and expect
mmc_register to go away before long.

Changes since v1:

* Use calloc instead of manually calling memset.
* Mark mmc_register as deprecated.

Signed-off-by: Pantelis Antoniou <panto@antoniou-consulting.com>
2014-03-24 12:58:56 +02:00
Pantelis Antoniou
22cb7d334e mmc: Convert mmc struct's name array to a pointer
Using an array is pointless; even more pointless (and scary) is using
sprintf to fill it without a format string.

Signed-off-by: Pantelis Antoniou <panto@antoniou-consulting.com>
2014-03-24 11:32:10 +02:00
Pantelis Antoniou
ab769f227f mmc: Remove ops from struct mmc and put in mmc_ops
Remove the in-structure ops and put them in mmc_ops with
a constant pointer to it.

This makes the mmc structure smaller as well as conserving
code space (in theory).

All in-tree drivers are converted as well; this is done in a
single patch in order to not break git bisect.

Changes since V1:
Fix compilation b0rked issue on omap platforms where OMAP_GPIO was
not set.

Signed-off-by: Pantelis Antoniou <panto@antoniou-consulting.com>
2014-03-24 11:32:10 +02:00
Łukasz Majewski
7d0b605abb dfu: mmc: Replace calls to u-boot commands with native mmc API
For some time we have been using the run_command() with properly crafted
string. Such approach turned to be unreliable and error prone.

Switch to "native" mmc subsystem API would allow better type checking and
shall improve speed.

Also, it seems that this API is changing less often than u-boot commands.
The approach similar to env operations on the eMMC has been reused.

Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
2014-03-23 02:20:10 +01:00
Heiko Schocher
401341d621 am335x, dfu: add DFU_MANIFEST_POLL_TIMEOUT to the siemens boards
as the siemens boards use dfu for updating a nand ubi partition
add DFU_MANIFEST_POLL_TIMEOUT to them, so dfu host waits after
complete transfer of the new image for DFU_MANIFEST_POLL_TIMEOUT
ms before sending again an usb request. So the board have enough
time to erase rest of the nand sectors.

Signed-off-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Lukasz Majewski <l.majewski@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Tom Rini <trini@ti.com>
Cc: Pantelis Antoniou <panto@antoniou-consulting.com>
2014-03-23 02:20:10 +01:00
Heiko Schocher
001a831986 usb: dfu: introduce dfuMANIFEST state
on nand flash using ubi, after the download of the new image into
the flash, the "rest" of the nand sectors get erased while flushing
the medium. With current u-boot version dfu-util may show:

Starting download: [##################################################] finished!
state(7) = dfuMANIFEST, status(0) = No error condition is present
unable to read DFU status

as get_status is not answered while erasing sectors, if erasing
needs some time.

So do the following changes to prevent this:

- introduce dfuManifest state
  According to dfu specification
  ( http://www.usb.org/developers/devclass_docs/usbdfu10.pdf ) section 7:
  "the device enters the dfuMANIFEST-SYNC state and awaits the solicitation
   of the status report by the host. Upon receipt of the anticipated
   DFU_GETSTATUS, the device enters the dfuMANIFEST state, where it
   completes its reprogramming operations."

- when stepping into dfuManifest state, sending a PollTimeout
  DFU_MANIFEST_POLL_TIMEOUT in ms, to the host, so the host
  (dfu-util) waits the PollTimeout before sending a get_status again.

Signed-off-by: Heiko Schocher <hs@denx.de>
Cc: Lukasz Majewski <l.majewski@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Pantelis Antoniou <panto@antoniou-consulting.com>
2014-03-23 02:20:09 +01:00
Heiko Schocher
a2199afea1 usb, dfu: extract flush code into seperate function
move the flushing code into an extra function dfu_flush(),
so it can be used from other code.

Signed-off-by: Heiko Schocher <hs@denx.de>
Cc: Lukasz Majewski <l.majewski@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Pantelis Antoniou <panto@antoniou-consulting.com>
2014-03-23 02:20:09 +01:00
Simon Glass
659c89da8e patman: Use Patch-cc: instead of Cc:
Add a new Patch-cc: tag which performs the service now provided by
the Cc: tag. The Cc: tag is interpreted by git send-email but
ignored by patman.

So now:

  Cc: patman does nothing. (git send-email can cc patches)
  Patch-cc: patman Cc's patch and removes this tag from the patch

Signed-off-by: Simon Glass <sjg@chromium.org>
2014-03-22 14:47:30 -06:00
Patrice Bouchand
def23217e4 sandbox: Enable CONFIG_CMD_LZMADEC in sandbox.h
As Simon Glass requested it, here's a patch that enables
CONFIG_CMD_LZMADEC in sandbox.

Signed-off-by: Patrice Bouchand <pbfwdlist@gmail.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
2014-03-22 14:47:30 -06:00
Patrice Bouchand
5527f832c0 Add lzmadec command
I needed to be able to uncompress lzma files. I did this command
based on unzip command and propose it if it could help.

Signed-off-by: Patrice Bouchand <pbfwdlist@gmail.com>
Changed to work with sandbox
Signed-off-by: Simon Glass <sjg@chromium.org>
2014-03-22 14:47:22 -06:00
Simon Glass
2c072c958b sandbox: config: Enable cros_ec emulation and related items
Enable the Chrome OS EC emulation for sandbox along with LCD, sound
expanded GPIOs and a few other options to make this work correctly.

Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Che-Liang Chiou <clchiou@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
2014-03-17 20:05:50 -06:00
Simon Glass
6e16d90aca sandbox: Add implementation of spi_setup_slave_fdt()
This function is needed when CONFIG_OF_SPI is defined.

Signed-off-by: Simon Glass <sjg@chromium.org>
2014-03-17 20:05:50 -06:00
Simon Glass
ab839dc3e6 sandbox: Add options to clean up temporary files
When jumping from one sandbox U-Boot to another in sandbox, the RAM buffer
is preserved in the jump by using a temporary file. Add an option to tell
the receiving U-Boot to remove this file when it is no longer needed.

Similarly the old U-Boot image is left behind in this case. We cannot delete
it immediately since gdb cannot then find its debug symbols. Delete it just
before exiting.

Together these changes ensure that temporary files are removed both for
memory and U-Boot.

Signed-off-by: Simon Glass <sjg@chromium.org>
2014-03-17 20:05:49 -06:00
Simon Glass
ffb87905cb sandbox: Allow Ctrl-C to work in sandbox
It is useful for Cltl-C to be handled by U-Boot as it is on other boards.
But it is also useful to be able to terminate U-Boot with Ctrl-C.

Add an option to enable signals while in raw mode, and make this the
default. Add an option to leave the terminal cooked, which is useful for
redirecting output.

Signed-off-by: Simon Glass <sjg@chromium.org>
2014-03-17 20:05:49 -06:00
Simon Glass
20f86a0aea sandbox: Deal with conflicting getenv() for SDL
Unfortunately SDL requires getenv() to operate, since it wants to figure out
the display type. U-Boot has its own getenv() and they conflict. As a
work-around use #define to resolve the conflict.

A better but more complex solution might be to rename some U-Boot symbols
at link time. SDL audio is not functional at present, likely due to a related
issue.

Note: Vic Yank wrote a script for this, filed in crbug.com/271125.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
2014-03-17 20:05:49 -06:00
Simon Glass
a77bf70978 sound: Move Samsung-specific code into its own file
The i2s code is in fact Samsung-specific, but there might be other
implementation. Move this code into its own file. This makes it slightly
more obviously how to adjust the code to support another SoC, when someone
takes this task on.

Also drop non-FDT support, since it isn't used on Exynos 5.

Tested-by: Che-Liang Chiou <clchiou@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
2014-03-17 20:05:49 -06:00
Simon Glass
7d95f2a329 sandbox: Add LCD driver
Add a simple LCD driver which uses SDL to display the image. We update the
image regularly, while still providing for reasonable performance.

Adjust the common lcd code to support sandbox.

For command-line runs we do not want the LCD to be displayed, so add a
--show_lcd option to enable it.

Tested-by: Che-Liang Chiou <clchiou@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
2014-03-17 20:05:49 -06:00
Simon Glass
c34c0246a3 sandbox: Add a simple sound driver
Add a sound driver for sandbox, which uses SDL.

Tested-by: Che-Liang Chiou <clchiou@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
2014-03-17 20:05:48 -06:00
Simon Glass
bbc09bf27e sandbox: Add SDL library for LCD, keyboard, audio
SDL (Simple DirectMedia Layer - see www.libsdl.org) is a library which
provides simple graphics and sound features. It works under X11 and also
with a simple frame buffer interface. It is ideally suited to sandbox
U-Boot since it fits nicely with the low-level feature set required by
U-Boot. For example, U-Boot has its own font drawing routines, its own
keyboard processing and just needs raw sound output.

We can use SDL to provide emulation of these basic functions for sandbox.
This significantly expands the testing that is possible with sandbox.

Add a basic SDL library which we will use in future commits.

Tested-by: Che-Liang Chiou <clchiou@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
2014-03-17 20:05:48 -06:00
Simon Glass
bda7773f04 sandbox: Add -j option to indicate a jump from a previous U-Boot
In order to support the 'go' command we allow the jumping U-Boot to pass its
filename to the new U-Boot image. This can then be used to delete that image
if required.

Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Che-Liang Chiou <clchiou@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
2014-03-17 20:05:48 -06:00
Simon Glass
47f5fcfb41 sandbox: Add os_jump_to_image() to run another executable
For some tests it is useful to be able to run U-Boot again but pass on the
same memory contents. Add a function to achieve this.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
2014-03-17 20:05:48 -06:00
Simon Glass
b2a668b523 cros_ec: Implement I2C pass-through
The Chrome EC has a feature where you can access its I2C buses through a
pass-through arrangement. Add a command to support this, and export the
function for it also.

Reviewed-by: Vadim Bendebury <vbendeb@google.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
2014-03-17 20:05:48 -06:00
Simon Glass
86bf601d04 sandbox: Plumb in Chrome OS EC emulation
Add board code to set up the Chrome OS EC on startup.

Signed-off-by: Simon Glass <sjg@chromium.org>
2014-03-17 20:05:48 -06:00
Simon Glass
df93d90aea cros_ec: sandbox: Add Chrome OS EC emulation
Add a simple emulation of the Chrome OS EC for sandbox, so that it can
perform various EC tasks such as keyboard handling.

Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
2014-03-17 20:05:47 -06:00
Simon Glass
2ab83f0d75 cros_ec: Correct comparison between signed and unsigned numbers
Due to signed/unsigned comparison, '< sizeof(struct)' does not do the right
thing, since if ec_command() returns a -ve number we will consider this be
success.

Adjust all comparisons to avoid this problem.

This error was found with sandbox, which gives a segfault in this case. On
ARM we may instead silently fail.

We should also consider turning on -Wsign-compare to catch this sort of thing
in future.

Reviewed-by: Andrew Chew <achew@nvidia.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>
Tested-by: Andrew Chew <achew@nvidia.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Jimmy Zhang <jimmzhang@nvidia.com>
2014-03-17 20:05:47 -06:00
Randall Spangler
a607028331 cros_ec: spi: Add support for EC protocol version 3
Protocol version 3 will be attempted first; if the EC doesn't support
it, u-boot will fall back to the old protocol version (2).

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
2014-03-17 20:05:47 -06:00
Simon Glass
2d8ede58ca cros_ec: Add base support for protocol v3
Protocol v2 was shipped with snow, link and spring. Protocol v3 is for
pit and is targetted at SPI operation.

Signed-off-by: Simon Glass <sjg@chromium.org>
2014-03-17 20:05:47 -06:00
Randall Spangler
e8c1266236 cros_ec: Clean up multiple EC protocol support
Version 1 protocols (without command version) were already no longer
supported in cros_ec.c.  This removes some dead code from the
cros_ec_i2c driver.

Version 2 protcols (with command version) are now called
protocol_version=2, instead of cmd_version_is_supported=1.

A subsequent change will introduce protocol version 3 for SPI.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
2014-03-17 20:05:47 -06:00
Simon Glass
836bb6e827 cros_ec: Sync up with latest Chrome OS EC version
The EC messages have been expanded and some parts have been renamed.

Signed-off-by: Simon Glass <sjg@chromium.org>
2014-03-17 20:05:47 -06:00
Simon Glass
1c266b9214 cros_ec: Move #ifdef to permit flash region access
Flash region access is not tied to having commands, so adjust the #ifdef
to reflect this.

Signed-off-by: Simon Glass <sjg@chromium.org>
2014-03-17 20:05:46 -06:00
Simon Glass
e0dd81e3aa cros_ec: Support systems with no EC interrupt
Some systems do not have an EC interrupt. Rather than assuming that the
interrupt is always present, and hanging forever waiting for more input,
handle the missing interrupt. This works by reading key scans only until
we get an identical one. This means the EC keyscan FIFO is empty.

Tested-by: Che-Liang Chiou <clchiou@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
2014-03-17 20:05:46 -06:00
Vadim Bendebury
4ff9b461a8 cros_ec: Drop old EC version support from EC driver
There is no need to support old style EC moving forward. Ultimately we
should get rid of the check_version() API. For now just return error
in case the EC does not seem to support the new API.

Reviewed-by: Vadim Bendebury <vbendeb@google.com>
Tested-by: Vadim Bendebury <vbendeb@google.com>
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
2014-03-17 20:05:46 -06:00
Simon Glass
d7f25f35f4 cros_ec: Add a function for decoding the Chrome OS EC flashmap
In order to talk to the EC properly we need to be able to understand the
layout of its internal flash memory. This permits emulation of the EC
for sandbox, and also software update in a system with a real EC.

Signed-off-by: Simon Glass <sjg@chromium.org>
2014-03-17 20:05:46 -06:00
Vadim Bendebury
41364f0fbe cros_ec: Move EC interface into common library
Add a common library for obtaining access to the Chrome OS EC. This is
used by boards which need to talk to the EC.

Reviewed-by: Vadim Bendebury <vbendeb@google.com>
Tested-by: Vadim Bendebury <vbendeb@google.com>
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
2014-03-17 20:05:46 -06:00
Simon Glass
006e73b9ca cros_ec: Add a function for reading a flash map entry
A flash map describes the layout of flash memory in terms of offsets and
sizes for each region. Add a function to read a flash map entry from the
device tree.

Reviewed-by: Che-Liang Chiou <clchiou@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
2014-03-17 20:05:46 -06:00
Simon Glass
cecb19c03f cros_ec: Add an enum for the number of flash regions
Add an enum for the number of flash regions so we can keep track of all
the possible regions.

Reviewed-by: Randall Spangler <rspangler@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
2014-03-17 20:05:45 -06:00
Simon Glass
39741c01e6 sandbox: dts: Add display and keyboard to sandbox
Add an LCD display and keyboard to the sandbox device tree so that these
features can be used.

Signed-off-by: Simon Glass <sjg@chromium.org>
2014-03-17 20:05:45 -06:00
Simon Glass
95fac6ab45 sandbox: Use os functions to read host device tree
At present we use U-Boot's filesystem layer to read the sandbox device tree,
but this is problematic since it relies on a temporary feauture added
there. Since we plan to implement proper block layer support for sandbox,
change this code to use the os layer functions instead. Also use the new
fdt_create_empty_tree() instead of our own code.

Signed-off-by: Simon Glass <sjg@chromium.org>
2014-03-17 20:05:45 -06:00
Simon Glass
9f6044256e sandbox: Increase memory size to 32MB
The current 4MB size is a little small for some tests, so increase it.

Reviewed-by: Hung-ying Tyan <tyanh@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
2014-03-17 20:05:45 -06:00
Simon Glass
66bd1cff90 Use a const pointer for map_to_sysmem()
This function does not actually change the pointer contents, so use const
so that functions which have a const pointer do not need to cast.

Signed-off-by: Simon Glass <sjg@chromium.org>
2014-03-17 20:05:45 -06:00