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* powerpc/lib: fix unsafe register handling in wait_ticksMats Kärrman2013-04-10-6/+11
| | | | | | | | | | | | | | | | | | | | If watchdog is enabled, the arch/powerpc/lib/ticks.S::wait_ticks() function calls the function specified by the WATCHDOG_RESET macro. The wait_ticks function depends on the registers r0, r6 and r7 being preserved however that is not guaranteed, e.g. if the reset function is a C function this will probably overwrite r0 and cause an endless loop. The following patch changes to using r14+r15 instead of r6+r7 (to resemble what would have been generated by a C compiler) and saves all necessary registers on the stack. The patch has been tested on a custom MPC5125 based machine using the 512x powerpc architecture. Signed-off-by: Mats Karrman <mats.karrman@tritech.se> Cc: Wolfgang Denk <wd@denx.de> Acked-by: Joakim Tjernlund <joakim.tjernlund@transmode.se> Tested-by: Stefan Roese <sr@denx.de>
* ppc: Enable generic board supportSimon Glass2013-03-15-0/+2
| | | | | | | This enables generic board support so that ppc boards can define CONFIG_SYS_GENERIC_BOARD. Signed-off-by: Simon Glass <sjg@chromium.org>
* Introduce generic post-relocation board_r.cSimon Glass2013-03-15-1/+2
| | | | | | | This file handles common post-relocation init for boards which use the generic framework. Signed-off-by: Simon Glass <sjg@chromium.org>
* Declare watchdog functions in watchdog.hSimon Glass2013-03-15-9/+2
| | | | | | | | These functions are only available for powerpc and are not declared in a header file. We want to use the rest function in two places (board_f and board_r), so declare the functions in watchdog.h. Signed-off-by: Simon Glass <sjg@chromium.org>
* Replace __bss_end__ with __bss_endSimon Glass2013-03-15-2/+2
| | | | | | | | | | | | | Note this is a tree-wide change affecting multiple architectures. At present we use __bss_start, but mostly __bss_end__. This seems inconsistent and in a number of places __bss_end is used instead. Change to use __bss_end for the BSS end symbol throughout U-Boot. This makes it possible to use the asm-generic/sections.h file on all archs. Signed-off-by: Simon Glass <sjg@chromium.org>
* Clean up libfdt.h includesGerald Van Baren2013-02-08-1/+0
| | | | | | | | | | The libfdt.h file is the definition file for libfdt. It is unnecessary to include other fdt header files (the necessary ones are pulled in by libfdt.h). Signed-off-by: Gerald Van Baren <gvb@unssw.com> Acked-by: Simon Glass <sjg@chromium.org> Acked-by: Stefan Roese <sr@denx.de>
* treewide: include libfdt_env.h before fdt.hKim Phillips2013-02-07-1/+0
| | | | | | | | | | | and, if including libfdt.h which includes libfdt_env.h in the correct order, don't include fdt.h before libfdt.h. this is needed to get the fdt type definitions set from the project environment before fdt.h uses them. Signed-off-by: Kim Phillips <kim.phillips@freescale.com> Cc: Jerry Van Baren <gvb.uboot@gmail.com>
* ppc: Move mpc8220 clocks to arch_global_dataSimon Glass2013-02-04-7/+7
| | | | | | | Move these fields into arch_global_data and tidy up. The bExtUart field does not appear to be used, so punt it. Signed-off-by: Simon Glass <sjg@chromium.org>
* ppc: Move mpc512x clocks to arch_global_dataSimon Glass2013-02-04-1/+1
| | | | | | Move ips_clk and csb_clk into arch_global_data and tidy up. Signed-off-by: Simon Glass <sjg@chromium.org>
* ppc: Move mpc5xxx clocks to arch_global_dataSimon Glass2013-02-04-1/+1
| | | | | | Move ipb_clk and pci_clk into arch_global_data and tidy up. Signed-off-by: Simon Glass <sjg@chromium.org>
* ppc: Move lbc_clk and cpu to arch_global_dataSimon Glass2013-02-04-3/+4
| | | | | | | | Move these fields into arch_global_data and tidy up. Signed-off-by: Simon Glass <sjg@chromium.org> [trini: Update for bsc9132qds.c, b4860qds.c] Signed-off-by: Tom Rini <trini@ti.com>
* ppc: Move clock fields to arch_global_dataSimon Glass2013-02-01-3/+3
| | | | | | | | Move vco_out, cpm_clk, scc_clk, brg_clk into arch_global_data and tidy up. Leave pci_clk on its own since this should really depend only on CONFIG_PCI and not any particular chip type. Signed-off-by: Simon Glass <sjg@chromium.org>
* ppc: Move brg_clk to arch_global_dataSimon Glass2013-02-01-1/+1
| | | | | | Move this field into arch_global_data and tidy up. Signed-off-by: Simon Glass <sjg@chromium.org>
* powerpc/mpc83xx: add support for new SPLScott Wood2012-12-19-1/+2
| | | | | | | | | | | | This adds arch support for PPC mpc83xx to boot "minimal" (4K) SPLs using the new infrastructure. Existing nand_spl targets are updated to deal with the name change from nand_init.c to spl_minimal.c (as in theory this isn't limited to NAND anymore). Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
* env: Use getenv_yesno() more generallyJoe Hershberger2012-12-13-7/+2
| | | | | | | Move the getenv_yesno() to env_common.c and change most checks for 'y' or 'n' to use this helper. Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
* mpc5200: Add SPL supportStefan Roese2012-12-05-0/+8
| | | | | | | This patch adds SPL booting support (NOR flash) for the MPC5200 platforms. Signed-off-by: Stefan Roese <sr@denx.de>
* SPL: Port SPL framework to powerpcStefan Roese2012-12-05-0/+46
| | | | | | | | | | | | | This patch enables the SPL framework to be used on powerpc platforms and not only ARM. timer_init() does not exist on PPC systems. The timer (decrementer) is initialized and enabled in interrupt_init() here. And currently interrupt_init() is called after relocation to SDRAM. Since the only powerpc SPL implementation (a3m071) doesn't need a timer, let's remove this timer_init() call for PPC systems. Signed-off-by: Stefan Roese <sr@denx.de>
* powerpc: Extract EPAPR_MAGIC constants into processor.hStefan Roese2012-12-05-6/+0
| | | | | | | | By extracting these defines into a header, they can be re-used by other C sources as well. This will be done by the SPL framework OS boot support. Signed-off-by: Stefan Roese <sr@denx.de>
* spl/powerpc: introduce CONFIG_SPL_INIT_MINIMALScott Wood2012-11-26-1/+16
| | | | | | | | | cpu_init_nand.c is renamed to spl_minimal.c as it is not really NAND-specific. Signed-off-by: Scott Wood <scottwood@freescale.com> --- v2: factor out START, and change cpu_init_nand.c to spl_minimal.c Cc: Andy Fleming <afleming@freescale.com>
* powerpc: change .fixup test to a GCC version testScott Wood2012-11-26-6/+0
| | | | | | | | | | | | | | | This was introduced by commit 244615197469dd6fe75ae082f38424b97c79aeaf, but it fails in a minimal SPL build where the only thing in arch/powerpc/lib is cache.c, which apparently doesn't generate any fixup records. The problem is reported to occur with GCC 3.x, so insist on GCC 4.0 or newer. Patterned after checkthumb as suggested by Tom Rini. Signed-off-by: Scott Wood <scottwood@freescale.com> Cc: Peter Tyser <ptyser@xes-inc.com> Cc: Tom Rini <trini@ti.com> -- v2: test gcc version instead of testing nothing
* arch/powerpc/lib/board.c, *traps.c: sparse fixesKim Phillips2012-11-04-6/+6
| | | | | | | | | | | | | traps.c:*:1: warning: symbol 'print_backtrace' was not declared. Should it be static? traps.c:93:1: warning: symbol '_exception' was not declared. Should it be static? board.c:166:6: warning: symbol '__board_add_ram_info' was not declared. Should it be static? board.c:174:5: warning: symbol '__board_flash_wp_on' was not declared. Should it be static? board.c:187:6: warning: symbol '__cpu_secondary_init_r' was not declared. Should it be static? board.c:265:12: warning: symbol 'init_sequence' was not declared. Should it be static? board.c:348:5: warning: symbol '__fixup_cpu' was not declared. Should it be static? board.c:405:53: warning: Using plain integer as NULL pointer Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
* arch/powerpc/lib/extable.c: sparse fixKim Phillips2012-11-04-4/+1
| | | | | | | | | | | | extable.c:66:9: warning: symbol 'ex_tab_message' was not declared. Should it be static? making it static can produce a new build warning on some boards: extable.c:66:12: warning: 'ex_tab_message' defined but not used [-Wunused-variable] but ex_tab_message doesn't do much even when used, so just remove it. Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
* include/linux/byteorder: import latest endian definitions from linuxKim Phillips2012-11-04-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | u-boot's byteorder headers did not contain endianness attributions for use with sparse, causing a lot of false positives. Import the kernel's latest definitions, and enable them by including compiler.h and types.h. They come with 'const' added for some swab functions, so fix those up, too: include/linux/byteorder/big_endian.h:46:2: warning: passing argument 1 of '__swab64p' discards 'const' qualifier from pointer target type [enabled by default] Also, note: u-boot's historic __BYTE_ORDER definition has been preserved (for the time being at least). We also remove ad-hoc barrier() definitions, since we're including compiler.h in files that hadn't in the past: macb.c:54:0: warning: "barrier" redefined [enabled by default] In addition, including compiler.h in byteorder changes the 'noinline' definition to expand to __attribute__((noinline)). This fixes arch/powerpc/lib/bootm.c: bootm.c:329:16: error: attribute '__attribute__': unknown attribute bootm.c:329:16: error: expected ')' before '__attribute__' bootm.c:329:25: error: expected identifier or '(' before ')' token powerpc sparse builds yield: include/common.h:356:22: error: marked inline, but without a definition the unknown-reason inlining without a definition is considered obsolete given it was part of the 2002 initial commit, and no arm version was 'fixed.' also fixed: ydirectenv.h:60:0: warning: "inline" redefined [enabled by default] and: Configuring for devconcenter - Board: intip, Options: DEVCONCENTER make[1]: *** [4xx_ibm_ddr2_autocalib.o] Error 1 make: *** [arch/powerpc/cpu/ppc4xx/libppc4xx.o] Error 2 powerpc-fsl-linux-size: './u-boot': No such file 4xx_ibm_ddr2_autocalib.c: In function 'DQS_autocalibration': include/asm/ppc4xx-sdram.h:1407:13: sorry, unimplemented: inlining failed in call to 'ppc4xx_ibm_ddr2_register_dump': function body not available 4xx_ibm_ddr2_autocalib.c:1243:32: sorry, unimplemented: called from here and: In file included from crc32.c:50:0: crc32table.h:4:1: warning: implicit declaration of function '___constant_swab32' [-Wimplicit-function-declaration] crc32table.h:4:1: error: initializer element is not constant crc32table.h:4:1: error: (near initialization for 'crc32table_le[0]') Signed-off-by: Kim Phillips <kim.phillips@freescale.com> [trini: Remove '#endif' in include/common.h around setenv portion] Signed-off-by: Tom Rini <trini@ti.com>
* powerpc/mpc85xx: software workaround for DDR erratum A-004468York Sun2012-10-22-2/+2
| | | | | | | | | | | | | | | Boot space translation utilizes the pre-translation address to select the DDR controller target. However, the post-translation address will be presented to the selected DDR controller. It is possible that the pre- translation address selects one DDR controller but the post-translation address exists in a different DDR controller when using certain DDR controller interleaving modes. The device may fail to boot under these circumstances. Note that a DDR MSE error will not be detected since DDR controller bounds registers are programmed to be the same when configured for DDR controller interleaving. Signed-off-by: York Sun <yorksun@freescale.com> Signed-off-by: Andy Fleming <afleming@freescale.com>
* split mpc8xx hooks from cmd_ide.cPavel Herrmann2012-10-17-0/+233
| | | | | | | | | | | | | move most of mpc8xx hooks from cmd_ide.c into ide_preinit() and newly created ide_init_postreset() (invoked after calling ide_reset after ide_preinit), some cleanup to make checkpatch happy, enable IDE init hooks in configs of affected boards. confusingly, these hooks are used by more than just mpc8xx-based boards, and therefore are placed in arch/ppc/lib/ note: checkpatch still emits warnings about using volatile Signed-off-by: Pavel Herrmann <morpheus.ibis@gmail.com>
* serial: Remove CONFIG_SERIAL_MULTI from remaining sourcesMarek Vasut2012-10-15-2/+0
| | | | | | | | | | | | Remove the parts depending either on disabled CONFIG_SERIAL_MULTI or ifdefs around CONFIG_SERIAL_MULTI parts since CONFIG_SERIAL_MULTI is now enabled by default. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Marek Vasut <marek.vasut@gmail.com> Cc: Tom Rini <trini@ti.com> Cc: Anatolij Gustschin <agust@denx.de> Cc: Stefan Roese <sr@denx.de>
* Merge branch 'master' of git://git.denx.de/u-boot-mpc85xxTom Rini2012-09-25-3/+15
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| * powerpc/mpc8xxx: use topology registers to calculate number of coresYork Sun2012-08-23-0/+13
| | | | | | | | | | | | | | | | | | We have actual topology infomation to find out exactly which core is present. Calculate the number of cores if not specified. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: York Sun <yorksun@freescale.com> Signed-off-by: Andy Fleming <afleming@freescale.com>
| * powerpc: Stack Pointer not properly alignedJoakim Tjernlund2012-08-22-3/+2
| | | | | | | | | | | | | | | | | | The code first aligns the SP to 16 then subtract 8, making it 8 bytes aligned. Furthermore the initial stack frame not quite correct either. Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se> Signed-off-by: Andy Fleming <afleming@freescale.com>
* | ppc: Create a stack frame for wait_ticks()Joakim Tjernlund2012-09-02-2/+5
| | | | | | | | | | | | | | | | wait_ticks() calls get_ticks() without building a back chain which makes gdb unhappy when doing back trace. This can also cause improper memory accesses. Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
* | Consolidate bootcount code into drivers/bootcountStefan Roese2012-09-01-98/+0
|/ | | | | | | | | | | | | | | | | | | This patch moves all bootcount implementations into a common directory: drivers/bootcount. The generic bootcount driver is now usable not only by powerpc platforms, but others as well. Signed-off-by: Stefan Roese <sr@denx.de> Cc: Heiko Schocher <hs@denx.de> Cc: Valentin Longchamp <valentin.longchamp@keymile.com> Cc: Christian Riesch <christian.riesch@omicron.at> Cc: Manfred Rudigier <manfred.rudigier@omicron.at> Cc: Mike Frysinger <vapier@gentoo.org> Cc: Rob Herring <rob.herring@calxeda.com> Cc: Reinhard Meyer <reinhard.meyer@emk-elektronik.de> Tested-by: Valentin Longchamp <valentin.longchamp@keymile.com> Tested-by: Christian Riesch <christian.riesch@omicron.at> Acked-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Mike Frysinger <vapier@gentoo.org>
* net: move bootfile init into eth_initializeMike Frysinger2012-05-15-8/+0
| | | | | | | | All arches init this the same way, so move the logic into the core net code to avoid duplicating it everywhere else. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Reviewed-by: Joe Hershberger <joe.hershberger@ni.com>
* net: punt bd->bi_ip_addrMike Frysinger2012-05-15-3/+0
| | | | | | | | | This field gets read in one place (by "bdinfo"), and we can replace that with getenv("ipaddr"). After all, the bi_ip_addr field is kept up-to-date implicitly with the value of the ipaddr env var. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Reviewed-by: Joe Hershberger <joe.hershberger@ni.com>
* bootstage: Replace show_boot_progress/error() with bootstage_...()Simon Glass2012-03-18-2/+2
| | | | | | | These calls should not be made directly any more, since bootstage will call the show_boot_...() functions as needed. Signed-off-by: Simon Glass <sjg@chromium.org>
* bootstage: Convert progress numbers 20-41 to enumsSimon Glass2012-03-18-1/+1
| | | | Signed-off-by: Simon Glass <sjg@chromium.org>
* bootstage: Use show_boot_error() for -ve progress numbersSimon Glass2012-03-18-1/+1
| | | | | | | | Rather than the caller negating our progress numbers to indicate an error has occurred, which seems hacky, add a function to indicate this. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Mike Frysinger <vapier@gentoo.org>
* bootstage: Make use of BOOTSTAGE_ID_RUN_OS in show_boot_progress()Simon Glass2012-03-18-1/+1
| | | | | | | | | This changes the number 15 as used in boot_stage_progress() to use the new name provided for it. This is a separate patch because it touches so many files. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Mike Frysinger <vapier@gentoo.org>
* ppc: Change memsz variable to signed charSimon Glass2012-03-03-4/+3
| | | | | | | | This seems to be unsigned char for no good reason. Tidy this up and remove the casts. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Mike Frysinger <vapier@gentoo.org>
* powerpc/bootm: Flush ramdisk and device tree image when booting on MPKumar Gala2011-12-12-6/+16
| | | | | | | | | | | | | We already flush the kernel image after we've loaded it to ensure visiblity to the other cores. We need to do the same thing for the ramdisk and device tree images. In AMP boot scenarios we might not be HW cache coherent with the secondary core that we are loading and setting the ramdisk and device tree up for. Thus we need to ensure we've flushed the regions of memory utilized by ramdisk and device tree so the loadding and any modifications (from decompression or fdt updates) are made visible to the secondary cores. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* powerpc: Minimal private libgcc to build on DebianKyle Moffett2011-12-07-1/+159
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Standard Debian powerpc and powerpcspe systems only include hard-float libgcc in their native compilers, which causes scary build warnings when building U-Boot. Debian and other PowerPC-supporting distributions used to provide libgcc and other libraries in a "nof" (soft-float) form in the "multilib" packages. As they were completely unused by the distribution and therefore tended to be very buggy it was decided to save some time on the part of the maintainers and build-servers by removing them. Admittedly, right now the linker warnings do not indicate any problems, as the included routines do not use any floating point at all. The concern is that if floating-point code were ever added it might cause hard-float code to be unexpectedly included in U-Boot without generating a hard error. This would cause unexplained crashes or indeterminate results at runtime. The easiest way to resolve this is to borrow the routines that U-Boot needs from the Linux kernel, which has the same issue. Specifically, the routines are: _ashldi3(), _ashrdi3(), and _lshrdi3(). They were borrowed from arch/powerpc/kernel/misc_32.S as of v2.6.38-rc5, commit 85e2efbb1db9a18d218006706d6e4fbeb0216213, and are GPLv2+. The Makefile framework was copied from the U-Boot ARM port. Signed-off-by: Kyle Moffett <Kyle.D.Moffett@boeing.com> Cc: Wolfgang Denk <wd@denx.de> Cc: Kim Phillips <kim.phillips@freescale.com> Cc: Andy Fleming <afleming@gmail.com> Cc: Kumar Gala <kumar.gala@freescale.com> Cc: Stefan Roese <sr@denx.de>
* arch/powerpc/lib/bat_rw.c: Fix GCC 4.6 build warningWolfgang Denk2011-11-07-1/+2
| | | | | | | | | | | Fix: bat_rw.c: In function 'write_bat': bat_rw.c:38:6: warning: variable 'batn' set but not used [-Wunused-but-set-variable] Signed-off-by: Wolfgang Denk <wd@denx.de> Cc: Kumar Gala <galak@kernel.crashing.org> Cc: Andy Fleming <afleming@gmail.com>
* arch/powerpc/lib/board.c: fix build warningWolfgang Denk2011-11-07-3/+0
| | | | | | | | Fix: board.c: In function 'board_init_r': board.c:633:8: warning: unused variable 's' [-Wunused-variable] Signed-off-by: Wolfgang Denk <wd@denx.de>
* arch/powerpc/lib/board.c: make (mostly) checkpatch-cleanWolfgang Denk2011-11-07-221/+234
| | | | | | | | | | | | | | | | | | CodingStyle cleanup. Accepted (in this cleanup) checkpatch messages: - externs should be avoided (to be cleaned up later) - no spaces at the start of a line (accepted in multi-line #if's) - Macros with complex values (false reports) - do not use assignment in if condition (accepted in one place, where avoiding it would have required an additional level of nesting, resulting in less readable code) Signed-off-by: Wolfgang Denk <wd@denx.de>
* arch/powerpc/lib/board.c: fix build warningWolfgang Denk2011-11-03-1/+3
| | | | | | | | | | | | | | Commit 1272592 "powerpc: Use getenv_ulong() in place of getenv(), strtoul" instroduced a build warning for some PPC systems: board.c: In function 'board_init_r': board.c:626: warning: unused variable 's' Fix it. Signed-off-by: Wolfgang Denk <wd@denx.de> Acked-by: Simon Glass <sjg@chromium.org> Acked-by: Heiko Schocher <hs@denx.de>
* powerpc: Correct build warning introduced by getenv_ulong() patchSimon Glass2011-10-24-3/+7
| | | | | | | Commit 1272592 introduced a warning since the variable 's' is no longer always used, depending on the CONFIG options. Signed-off-by: Simon Glass <sjg@chromium.org>
* powerpc/lib/board.c: Call run_post(POST_ROM) before relocatingBernhard Kaindl2011-10-23-7/+7
| | | | | | | | | | | | | | | | | | | The call to run_post(POST_ROM) which can run the POST memory test is currently called too late when gd has already been copied to DRAM. This results in failure to boot Linux after a POST_ROM memory test tested all RAM while gd was already relocated to DRAM due to gd being overwritten by the POST_ROM memory test. Support this by moving the call to run_post(POST_ROM) to run earlier, before U-Boot has started to move data to DRAM (from late board_init_f to early board_init_f) where DRAM is initialized, but not used yet. This allows that an POST memory test can test the whole DRAM, including the area where the board info struct is located. Signed-off-by: Bernhard Kaindl <bernhard.kaindl@thalesgroup.com> Cc: Pieter Voorthuijsen <pieter.voorthuijsen@prodrive.nl>
* powerpc: Use getenv_ulong() in place of getenv(), strtoulSimon Glass2011-10-23-25/+8
| | | | | | | This changes the board code to use the new getenv_ulong() function. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Stefan Roese <sr@denx.de>
* net: drop !NET_MULTI codeMike Frysinger2011-10-05-2/+0
| | | | | | | | | | | This is long over due. All but two net drivers have been converted, but those have now been dropped. The only thing left to do is actually delete all references to NET_MULTI and code that is compiled when that is not defined. So here we scrub the core code. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Flush cache after the OS image is loaded into the memory.Diana CRACIUN2011-09-05-14/+6
| | | | | | | | | | | | | | | | Since we are loading an executable image into memory we need flush it out of the cache to possible maintain coherence on CPUs with split instruction and data caches. We do this for other executable image loading command. On PowerPC once we do this we no longer need to explicitly flush the dcache on multi-core systems in the BOOTM_STATE_OS_PREP phase. We now treat the BOOTM_STATE_OS_PREP as a no-op to maintain backwards compatibility with the bootm subcommand. Signed-off-by: James Yang <James.Yang@freescale.com> Signed-off-by: Diana CRACIUN <Diana.Craciun@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* hwmon: do not init sensors on startupHeiko Schocher2011-08-04-3/+0
| | | | | | | | | | | | | | | | | The U-Boot Design Principles[1] clearly say: Initialize devices only when they are needed within U-Boot, i.e. don't initialize the Ethernet interface(s) unless U-Boot performs a download over Ethernet; don't initialize any IDE or USB devices unless U-Boot actually tries to load files from these, etc. (and don't forget to shut down these devices after using them - otherwise nasty things may happen when you try to boot your OS). So, do not initialize and read the sensors on startup. Signed-off-by: Heiko Schocher <hs@denx.de> cc: Wolfgang Denk <wd@denx.de> cc: Holger Brunck <holger.brunck@keymile.com>
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