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* ARM: OMAP1: Move dpll1 rates selection from config to runtimeJanusz Krzysztofik2011-12-081-1/+0
| | | | | | | | | | | | | | | | | | For still better multi-OMAP1 support, expand omap1_rate_table with flags for different SoC types and match them while selecting clock rates. The idea is stolen from current omap24xx clock rate selection algorithm. Since clkdev platform flag definitions are reused here, those had to be expanded with one extra entry for OMAP1710 subtype, as this is the only SoC for which we allow selection of the highest, 216 MHz rate. Once done, remove no longer needed clock rate configure time options. Tested on Amstrad Delta. Signed-off-by: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl> [tony@atomide.com: updated comments] Signed-off-by: Tony Lindgren <tony@atomide.com>
* ARM: OMAP1: Remove unsafe clock values from omap1_defconfigJanusz Krzysztofik2011-12-011-5/+0
| | | | | | | | | | | | | | | | | | | | | | | DPLL1 reprogramming to a different rate is actually blocked inside omap1_select_table_rate(), resulting in the defalut rate of 60 MHz always used instead of the one selected in .config. OTOH, in omap1_defconfig we currently rely on Kconfig options for the supported MHz rates in case of boards which boot with dpll1 not set correctly by their boot loaders. This means that before we allow for reprogramming of dpll1 rate, we should remove all unsafe clock selections from omap1_defconfig, otherwise it will stop booting on boards with imperfect boot loaders, as it would always try to change to 216MHz. Keep only one safe clock rate per each supported xtal frequency, i.e. 60MHZ dpll1 for 12MHz xtal and 182MHz dpll1 for 13MHz xtal. BTW, this change goes into the direction of removing all OMAP1 clock rate options, planned for next merge window. Signed-off-by: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl> Signed-off-by: Tony Lindgren <tony@atomide.com>
* ARM: OMAP: Fix reprogramming of dpll1 rateTony Lindgren2011-11-111-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit a66cb3454f220f49f900646ebdc76cb943319eb7 (ARM: OMAP: Map SRAM later on with ioremap_exec()) moved the SRAM init to happen later to remove a dependency to early SoC detection for map_io. This broke booting on some boards not using Kconfig option for OMAP_CLOCKS_SET_BY_BOOTLOADER as the dpll1 reprogramming would cause the following error: kernel BUG at arch/arm/plat-omap/sram.c:226! Internal error: Oops - undefined instruction: 0 [#1] PREEMPT Modules linked in: CPU: 0 Not tainted (3.2.0-rc1-e3 #9) PC is at omap_sram_reprogram_clock+0x28/0x30 LR is at omap1_select_table_rate+0x88/0xb4 pc : [<c001b0c4>] lr : [<c0019f54>] psr: 600000d3 sp : c035bf10 ip : c035bf20 fp : c035bf1c r10: c035bfd4 r9 : 54029252 r8 : c03f8120 r7 : c0362b50 r6 : 00b71b00 r5 : c03873cc r4 : c0362b40 r3 : 00000000 r2 : c0362b40 r1 : 0000010a r0 : 00002cb0 Flags: nZCv IRQs off FIQs off Mode SVC_32 ISA ARM Segment kernel Control: 0000317f Table: 10004000 DAC: 00000017 Process swapper (pid: 0, stack limit = 0xc035a270) Stack: (0xc035bf10 to 0xc035c000) bf00: c035bf3c c035bf20 c0019f54 c001b0ac bf20: 00001000 00002cb3 00000004 c035ed4c c035bf74 c035bf40 c033ea24 c0019edc bf40: c02f526c 00000002 00000015 bc058c9b 93111a16 c035335c 02000000 c035ed4c bf60: c035ed4c c03f8120 c035bf84 c035bf78 c00194c4 c033e8ec c035bfc4 c035bf88 bf80: c033bc24 c00194a0 c035bf90 c035bf98 00000000 00000000 00000000 00000000 bfa0: 00000001 00000000 c0354678 c035ece4 10004000 103532f4 c035bff4 c035bfc8 bfc0: c0338574 c033b598 00000000 00000000 00000000 c035467c 0000317d c035c03c bfe0: c0354678 c035ece4 00000000 c035bff8 10008040 c0338508 00000000 00000000 Backtrace: [<c001b09c>] (omap_sram_reprogram_clock+0x0/0x30) from [<c0019f54>] (omap1_select_table_rate+0x88/0xb4) [<c0019ecc>] (omap1_select_table_rate+0x0/0xb4) from [<c033ea24>] (omap1_clk_init+0x148/0x334) r7:c035ed4c r6:00000004 r5:00002cb3 r4:00001000 [<c033e8dc>] (omap1_clk_init+0x0/0x334) from [<c00194c4>] (omap1_init_early+0x34/0x48) r8:c03f8120 r7:c035ed4c r6:c035ed4c r5:02000000 r4:c035335c [<c0019490>] (omap1_init_early+0x0/0x48) from [<c033bc24>] (setup_arch+0x69c/0x79c) [<c033b588>] (setup_arch+0x0/0x79c) from [<c0338574>] (start_kernel+0x7c/0x2f4) [<c03384f8>] (start_kernel+0x0/0x2f4) from [<10008040>] (0x10008040) r7:c035ece4 r6:c0354678 r5:c035c03c r4:0000317d Code: 0a000002 e1a0e00f e12fff13 e89da800 (e7f001f2) Fix this by adding omap1_clk_late_init() that only reprograms dpll1 if the bootloader rate is less than 60MHz. This also allows removing of the OMAP_CLOCKS_SET_BY_BOOTLOADER option. Reported-by: Aaro Koskinen <aaro.koskinen@iki.fi> Tested-by: Aaro Koskinen <aaro.koskinen@iki.fi> Signed-off-by: Tony Lindgren <tony@atomide.com>
* kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERTDavid Rientjes2011-01-201-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The meaning of CONFIG_EMBEDDED has long since been obsoleted; the option is used to configure any non-standard kernel with a much larger scope than only small devices. This patch renames the option to CONFIG_EXPERT in init/Kconfig and fixes references to the option throughout the kernel. A new CONFIG_EMBEDDED option is added that automatically selects CONFIG_EXPERT when enabled and can be used in the future to isolate options that should only be considered for embedded systems (RISC architectures, SLOB, etc). Calling the option "EXPERT" more accurately represents its intention: only expert users who understand the impact of the configuration changes they are making should enable it. Reviewed-by: Ingo Molnar <mingo@elte.hu> Acked-by: David Woodhouse <david.woodhouse@intel.com> Signed-off-by: David Rientjes <rientjes@google.com> Cc: Greg KH <gregkh@suse.de> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jens Axboe <axboe@kernel.dk> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Robin Holt <holt@sgi.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* omap1: Add omap1_defconfigTony Lindgren2010-12-101-0/+286
The omap1_defconfig this should be eventually usable for booting all omap1 machines. Generated based on: $ grep ARCH_OMAP1=y arch/arm/configs/* | cut -d: -f1 | xargs cat | \ sort | uniq >> arch/arm/configs/omap1_defconfig Then change few things manually, like use Nokia 770 CONFIG_CMDLINE as it does not allow setting it in the bootloader. Finally ran make savedefconfig on it. Signed-off-by: Tony Lindgren <tony@atomide.com>
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