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2015-05-14ARM: Show proper respect for Heinrich Hertz by using the correct unit for ↵Russell King
frequency The SI unit of frequency is Hertz, named after Heinrich Hertz, and is given the symbol "Hz" to denote this. "hz" is not the unit of frequency, and is in fact meaningless. Fix arch/arm to correctly use "Hz", thereby acknowledging Heinrich Hertz' contribution to the modern world. Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Robert Jarzmik <robert.jarzmik@free.fr> Reviewed-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-07-18ARM: convert all "mov.* pc, reg" to "bx reg" for ARMv6+Russell King
ARMv6 and greater introduced a new instruction ("bx") which can be used to return from function calls. Recent CPUs perform better when the "bx lr" instruction is used rather than the "mov pc, lr" instruction, and this sequence is strongly recommended to be used by the ARM architecture manual (section A.4.1.1). We provide a new macro "ret" with all its variants for the condition code which will resolve to the appropriate instruction. Rather than doing this piecemeal, and miss some instances, change all the "mov pc" instances to use the new macro, with the exception of the "movs" instruction and the kprobes code. This allows us to detect the "mov pc, lr" case and fix it up - and also gives us the possibility of deploying this for other registers depending on the CPU selection. Reported-by: Will Deacon <will.deacon@arm.com> Tested-by: Stephen Warren <swarren@nvidia.com> # Tegra Jetson TK1 Tested-by: Robert Jarzmik <robert.jarzmik@free.fr> # mioa701_bootresume.S Tested-by: Andrew Lunn <andrew@lunn.ch> # Kirkwood Tested-by: Shawn Guo <shawn.guo@freescale.com> Tested-by: Tony Lindgren <tony@atomide.com> # OMAPs Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com> # Armada XP, 375, 385 Acked-by: Sekhar Nori <nsekhar@ti.com> # DaVinci Acked-by: Christoffer Dall <christoffer.dall@linaro.org> # kvm/hyp Acked-by: Haojian Zhuang <haojian.zhuang@gmail.com> # PXA3xx Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> # Xen Tested-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> # ARMv7M Tested-by: Simon Horman <horms+renesas@verge.net.au> # Shmobile Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-10-21ARM: OMAP2+: CM/hwmod: split CM functions into OMAP2, OMAP3-specific filesPaul Walmsley
Move OMAP3xxx-specific CM functions & macros into cm3xxx.[ch] and OMAP2xxx-specific macros into cm2xxx.[ch]. Move basic CM register access functions into static inline functions in cm2xxx_3xxx.h, leaving only OMAP2/3 hardreset functions in cm2xxx_3xxx.c. As part of this, split the CM and hwmod code that waits for devices to become ready into SoC-specific functions. This is in preparation for the upcoming move of this code to drivers/. Signed-off-by: Paul Walmsley <paul@pwsan.com> Reviewed-by: Russ Dill <Russ.Dill@ti.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
2012-10-21ARM: OMAP2+: PRM: split PRM functions into OMAP2, OMAP3-specific filesPaul Walmsley
Move OMAP3xxx-specific PRM functions & macros into prm3xxx.[ch] and OMAP2xxx-specific macros into prm2xxx.h. (prm2xxx.c will be created by a subsequent patch when it's needed.) Move basic PRM register access functions into static inline functions in prm2xxx_3xxx.h, leaving only OMAP2/3 hardreset functions in prm2xxx_3xxx.c. Also clarify the initcall function naming to reinforce that this code is specifically for the PRM IP block. This is in preparation for the upcoming powerdomain series and the upcoming move of this code to drivers/. Signed-off-by: Paul Walmsley <paul@pwsan.com> Reviewed-by: Russ Dill <Russ.Dill@ti.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
2012-09-12ARM: OMAP: Split plat/hardware.h, use local soc.h for omap2+Tony Lindgren
As the plat and mach includes need to disappear for single zImage work, we need to remove plat/hardware.h. Do this by splitting plat/hardware.h into omap1 and omap2+ specific files. The old plat/hardware.h already has omap1 only defines, so it gets moved to mach/hardware.h for omap1. For omap2+, we use the local soc.h that for now just includes the related SoC headers to keep this patch more readable. Note that the local soc.h still includes plat/cpu.h that can be dealt with in later patches. Let's also include plat/serial.h from common.h for all the board-*.c files. This allows making the include files local later on without patching these files again. Note that only minimal changes are done in this patch for the drivers/watchdog/omap_wdt.c driver to keep things compiling. Further patches are needed to eventually remove cpu_is_omap usage in the drivers. Also only minimal changes are done to sound/soc/omap/* to remove the unneeded includes and to define OMAP44XX_MCPDM_L3_BASE locally so there's no need to include omap44xx.h. While at it, also sort some of the includes in the standard way. Cc: linux-watchdog@vger.kernel.org Cc: alsa-devel@alsa-project.org Cc: Peter Ujfalusi <peter.ujfalusi@ti.com> Cc: Jarkko Nikula <jarkko.nikula@bitmer.com> Cc: Liam Girdwood <lrg@ti.com> Acked-by: Wim Van Sebroeck <wim@iguana.be> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2012-02-24ARM: OMAP2+: Move most of plat/io.h into local iomap.hTony Lindgren
There's no need to have these defines in plat/io.h. Note that we now need to ifdef omap_read/write calls as they will be available for omap1 only. While at it, clean up the includes to group them like they typically are grouped. Signed-off-by: Tony Lindgren <tony@atomide.com>
2011-02-04ARM: 6649/1: omap: use fncpy to copy the PM code functions to SRAMJean Pihet
The new fncpy API is better suited* for copying some code to SRAM at runtime. This patch changes the ad-hoc code to the more generic fncpy API. *: 1. fncpy ensures that the thumb mode bit is propagated, 2. fncpy provides the security of type safety between the original function and the sram function pointer. Tested OK on OMAP3 in low power modes (RET/OFF) using omap2plus_defconfig with !CONFIG_THUMB2_KERNEL. Compile tested on OMAP1/2 using omap1_defconfig. Boot tested on OMAP1 & OMAP2 Tested OK with suspend/resume on OMAP2420/n810 Boots fine on osk5912 and n800 Signed-off-by: Jean Pihet <j-pihet@ti.com> Acked-by: Kevin Hilman <khilman@ti.com> Acked-by: Tony Lindgren <tony@atomide.com> Reviewed-by: Dave Martin <dave.martin@linaro.org> Tested-by: Kevin Hilman <khilman@ti.com> Tested-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-12-21OMAP2/3: SRAM: add comment about crashes during a TLB missPaul Walmsley
Some users were observing crashes during the execution of CORE DVFS code from OCM RAM -- a locally-modified copy of the linux-omap code. Richard Woodruff tracked this down to a DTLB miss which had been inadvertently and intermittently caused by the local modifications. (The TLB miss caused the ARM MMU to attempt to walk the page tables stored in SDRAM, which was not possible since SDRAM is off-line for a portion of the CORE DVFS OCM RAM code.) Add a note to the OMAP2 & OMAP3 CORE DVFS SRAM code to warn others that changes may result in crashes here if they are not carefully tested. Signed-off-by: Paul Walmsley <paul@pwsan.com> Cc: Richard Woodruff <r-woodruff2@ti.com> Cc: Jon Hunter <jon-hunter@ti.com> Cc: Nishanth Menon <nm@ti.com>
2010-12-21OMAP2/3: PRCM: split OMAP2/3-specific PRCM code into OMAP2/3-specific filesPaul Walmsley
In preparation for adding OMAP4-specific PRCM accessor/mutator functions, split the existing OMAP2/3 PRCM code into OMAP2/3-specific files. Most of what was in mach-omap2/{cm,prm}.{c,h} has now been moved into mach-omap2/{cm,prm}2xxx_3xxx.{c,h}, since it was OMAP2xxx/3xxx-specific. This process also requires the #includes in each of these files to be changed to reference the new file name. As part of doing so, add some comments into plat-omap/sram.c and plat-omap/mcbsp.c, which use "sideways includes", to indicate that these users of the PRM/CM includes should not be doing so. Thanks to Felipe Contreras <felipe.contreras@gmail.com> for comments on this patch. Signed-off-by: Paul Walmsley <paul@pwsan.com> Cc: Jarkko Nikula <jhnikula@gmail.com> Cc: Peter Ujfalusi <peter.ujfalusi@nokia.com> Cc: Liam Girdwood <lrg@slimlogic.co.uk> Cc: Omar Ramirez Luna <omar.ramirez@ti.com> Acked-by: Omar Ramirez Luna <omar.ramirez@ti.com> Cc: Felipe Contreras <felipe.contreras@gmail.com> Acked-by: Felipe Contreras <felipe.contreras@gmail.com> Cc: Greg Kroah-Hartman <greg@kroah.com> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Reviewed-by: Kevin Hilman <khilman@deeprootsystems.com> Tested-by: Kevin Hilman <khilman@deeprootsystems.com> Tested-by: Rajendra Nayak <rnayak@ti.com> Tested-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
2009-10-19omap: Split OMAP2_IO_ADDRESS to L3 and L4Santosh Shilimkar
This patch splits OMAP2_IO_ADDRESS to OMAP2_L3_IO_ADDRESS and OMAP2_L4_IO_ADDRESS to reclaim more IO space. The omap_read*() and omap_write*() functions will work only over L4 address space. Current omap kernel stack uses these functions only to access registers over L4 io address space Note that these macros should only be used when ioremap does not work. Please use ioremap instead in all new code. Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2009-08-28OMAP: Remove OMAP_IO_ADDRESS, use OMAP1_IO_ADDRESS and OMAP2_IO_ADDRESS insteadTony Lindgren
Search and replace OMAP_IO_ADDRESS with OMAP1_IO_ADDRESS and OMAP2_IO_ADDRESS, and convert omap_read/write into a functions instead of a macros. Also rename OMAP_MPUIO_VBASE to OMAP1_MPUIO_VBASE. In the long run, most code should use ioremap + __raw_read/write instead. Signed-off-by: Tony Lindgren <tony@atomide.com>
2009-05-25ARM: OMAP2/3: Remove OMAP_PRM_REGADDR and OMAP2_PRM_BASETony Lindgren
Remove OMAP_PRM_REGADDR and use processor specific defines instead. Also fold in a patch from Kevin Hilman to add _OFFSET #defines for the PRCM registers to be used with the prm_[read|write]_* macros. These are used extensively in the forthcoming OMAP PM support. Also remove now unused OMAP2_PRM_BASE. Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2009-05-25ARM: OMAP2/3: Remove OMAP2_32KSYNCT_BASETony Lindgren
Use processor specific defines instead. As an extra bonus, this patch fixes the problem of CONFIG_DEBUG_SPINLOCK calling sched_clock before we have things initialized: http://patchwork.kernel.org/patch/15810/ Signed-off-by: Tony Lindgren <tony@atomide.com>
2008-08-07[ARM] Move include/asm-arm/arch-* to arch/arm/*/include/machRussell King
This just leaves include/asm-arm/plat-* to deal with. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-08-07[ARM] Remove asm/hardware.h, use asm/arch/hardware.h insteadRussell King
Remove includes of asm/hardware.h in addition to asm/arch/hardware.h. Then, since asm/hardware.h only exists to include asm/arch/hardware.h, update everything to directly include asm/arch/hardware.h and remove asm/hardware.h. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-07-03ARM: OMAP: SRAM: Split sram24xx.S into sram242x.S and sram243x.STony Lindgren
Split sram24xx.S into sram242x.S and sram243x.S Signed-off-by: Tony Lindgren <tony@atomide.com>
2008-07-03ARM: OMAP: SRAM: Move omap2 sram-fn.S to sram242x.STony Lindgren
This file will get split between sram242x.S and sram243x.S in following patch. Signed-off-by: Tony Lindgren <tony@atomide.com>