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License cleanup: add SPDX GPL-2.0 license identifier to files with no license Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-01 08:07:57 -06:00
# SPDX-License-Identifier: GPL-2.0
#
# Makefile for the linux kernel.
#
ccflags-y := -I$(srctree)/$(src)/include \
-I$(srctree)/arch/arm/plat-omap/include
# Common support
obj-y := id.o io.o control.o devices.o fb.o timer.o pm.o \
common.o dma.o wd_timer.o display.o i2c.o hdq1w.o omap_hwmod.o \
omap_device.o omap-headsmp.o sram.o
hwmod-common = omap_hwmod.o omap_hwmod_reset.o \
omap_hwmod_common_data.o
clock-common = clock.o
secure-common = omap-smc.o omap-secure.o
obj-$(CONFIG_ARCH_OMAP2) += $(omap-2-3-common) $(hwmod-common)
obj-$(CONFIG_ARCH_OMAP3) += $(omap-2-3-common) $(hwmod-common) $(secure-common)
obj-$(CONFIG_ARCH_OMAP4) += $(hwmod-common) $(secure-common)
obj-$(CONFIG_SOC_AM33XX) += $(hwmod-common)
obj-$(CONFIG_SOC_OMAP5) += $(hwmod-common) $(secure-common)
obj-$(CONFIG_SOC_AM43XX) += $(hwmod-common) $(secure-common)
obj-$(CONFIG_SOC_DRA7XX) += $(hwmod-common) $(secure-common)
ifneq ($(CONFIG_SND_SOC_OMAP_MCBSP),)
obj-y += mcbsp.o
endif
obj-$(CONFIG_TWL4030_CORE) += omap_twl.o
obj-$(CONFIG_SOC_HAS_OMAP2_SDRC) += sdrc.o
# SMP support ONLY available for OMAP4
smp-$(CONFIG_SMP) += omap-smp.o
smp-$(CONFIG_HOTPLUG_CPU) += omap-hotplug.o
omap-4-5-common = omap4-common.o omap-wakeupgen.o
obj-$(CONFIG_ARCH_OMAP4) += $(omap-4-5-common) $(smp-y) sleep44xx.o
obj-$(CONFIG_SOC_OMAP5) += $(omap-4-5-common) $(smp-y) sleep44xx.o
obj-$(CONFIG_SOC_AM43XX) += $(omap-4-5-common)
obj-$(CONFIG_SOC_DRA7XX) += $(omap-4-5-common) $(smp-y) sleep44xx.o
# Functions loaded to SRAM
obj-$(CONFIG_SOC_OMAP2420) += sram242x.o
obj-$(CONFIG_SOC_OMAP2430) += sram243x.o
# Restart code (OMAP4/5 currently in omap4-common.c)
obj-$(CONFIG_SOC_OMAP2420) += omap2-restart.o
obj-$(CONFIG_SOC_OMAP2430) += omap2-restart.o
obj-$(CONFIG_SOC_TI81XX) += ti81xx-restart.o
obj-$(CONFIG_SOC_AM33XX) += am33xx-restart.o
obj-$(CONFIG_SOC_AM43XX) += omap4-restart.o
obj-$(CONFIG_ARCH_OMAP3) += omap3-restart.o
obj-$(CONFIG_ARCH_OMAP4) += omap4-restart.o
obj-$(CONFIG_SOC_OMAP5) += omap4-restart.o
obj-$(CONFIG_SOC_DRA7XX) += omap4-restart.o
# SMS/SDRC
obj-$(CONFIG_ARCH_OMAP2) += sdrc2xxx.o
# obj-$(CONFIG_ARCH_OMAP3) += sdrc3xxx.o
# OPP table initialization
ifeq ($(CONFIG_PM_OPP),y)
obj-$(CONFIG_ARCH_OMAP3) += opp3xxx_data.o
obj-$(CONFIG_ARCH_OMAP4) += opp4xxx_data.o
endif
# Power Management
omap-4-5-pm-common = omap-mpuss-lowpower.o
obj-$(CONFIG_ARCH_OMAP4) += $(omap-4-5-pm-common)
obj-$(CONFIG_SOC_OMAP5) += $(omap-4-5-pm-common)
ifeq ($(CONFIG_PM),y)
obj-$(CONFIG_ARCH_OMAP2) += pm24xx.o
obj-$(CONFIG_ARCH_OMAP2) += sleep24xx.o
obj-$(CONFIG_ARCH_OMAP3) += pm34xx.o sleep34xx.o
omap-4-5-pm-common += pm44xx.o
obj-$(CONFIG_ARCH_OMAP4) += $(omap-4-5-pm-common)
obj-$(CONFIG_SOC_OMAP5) += $(omap-4-5-pm-common)
obj-$(CONFIG_SOC_DRA7XX) += $(omap-4-5-pm-common)
obj-$(CONFIG_SOC_AM33XX) += pm33xx-core.o sleep33xx.o
obj-$(CONFIG_SOC_AM43XX) += pm33xx-core.o sleep43xx.o
obj-$(CONFIG_PM_DEBUG) += pm-debug.o
obj-$(CONFIG_POWER_AVS_OMAP) += sr_device.o
obj-$(CONFIG_POWER_AVS_OMAP_CLASS3) += smartreflex-class3.o
endif
ifeq ($(CONFIG_CPU_IDLE),y)
obj-$(CONFIG_ARCH_OMAP3) += cpuidle34xx.o
omap-4-5-idle-common = cpuidle44xx.o
obj-$(CONFIG_ARCH_OMAP4) += $(omap-4-5-idle-common)
obj-$(CONFIG_SOC_OMAP5) += $(omap-4-5-idle-common)
obj-$(CONFIG_SOC_DRA7XX) += $(omap-4-5-idle-common)
endif
# PRCM
obj-y += prm_common.o cm_common.o
obj-$(CONFIG_ARCH_OMAP2) += prm2xxx_3xxx.o prm2xxx.o cm2xxx.o
obj-$(CONFIG_ARCH_OMAP3) += prm2xxx_3xxx.o prm3xxx.o cm3xxx.o
obj-$(CONFIG_ARCH_OMAP3) += vc3xxx_data.o vp3xxx_data.o
omap-prcm-4-5-common = cminst44xx.o prm44xx.o \
prcm_mpu44xx.o prminst44xx.o \
vc44xx_data.o vp44xx_data.o
obj-$(CONFIG_ARCH_OMAP4) += $(omap-prcm-4-5-common)
obj-$(CONFIG_SOC_OMAP5) += $(omap-prcm-4-5-common)
obj-$(CONFIG_SOC_DRA7XX) += $(omap-prcm-4-5-common)
am33xx-43xx-prcm-common += prm33xx.o cm33xx.o
obj-$(CONFIG_SOC_TI81XX) += $(am33xx-43xx-prcm-common)
obj-$(CONFIG_SOC_AM33XX) += $(am33xx-43xx-prcm-common)
obj-$(CONFIG_SOC_AM43XX) += $(omap-prcm-4-5-common) \
$(am33xx-43xx-prcm-common)
OMAP2+: voltage: reorganize, split code from data This is a first pass at reorganizing mach-omap2/voltage.c: - Separate almost all of the data from the code of mach-omap2/voltage.c. The code remains in mach-omap2/voltage.c. The data goes into one of several places, depending on what type of data it is: - Silicon process/validation data: mach-omap2/opp*_data.c - VC (Voltage Controller) data: mach-omap2/vc*_data.c - VP (Voltage Processor) data: mach-omap2/vp*_data.c - Voltage domain data: mach-omap2/voltagedomains*_data.c The ultimate goal is for all this data to be autogenerated, the same way we autogenerate the rest of our data. - Separate VC and VP common data from VDD-specific VC and VP data. - Separate common voltage.c code from SoC-specific code; reuse common code. - Reorganize structures to avoid unnecessary memory loss due to unpacked fields. There is much left to be done. VC code and VP code should be separated out into vc*.c and vp*.c files. Many fields in the existing structures are superfluous, and should be removed. Some code in voltage.c seems to be duplicated; that code should be moved into functions of its own. Proper voltage domain code should be created, as was done with the powerdomain and clockdomains, and powerdomains should reference voltagedomains. Thanks to Shweta Gulati <shweta.gulati@ti.com> for comments. Thanks to Rajendra Nayak <rnayak@ti.com> for finding and fixing some bugs that prevented OMAP4 from booting: https://patchwork.kernel.org/patch/587311/ His patch has been folded into this one to avoid breaking OMAP4 between patches. Thanks also to Kevin Hilman <khilman@ti.com> for finding and fixing a compile problem when !CONFIG_PM: http://www.spinics.net/lists/arm-kernel/msg118067.html His patch has also been folded into this one to avoid breaking !CONFIG_PM builds. Signed-off-by: Paul Walmsley <paul@pwsan.com> Cc: Shweta Gulati <shweta.gulati@ti.com> Cc: Rajendra Nayak <rnayak@ti.com> Cc: Kevin Hilman <khilman@ti.com>
2011-03-10 22:17:45 -07:00
# OMAP voltage domains
voltagedomain-common := voltage.o vc.o vp.o
obj-$(CONFIG_ARCH_OMAP2) += $(voltagedomain-common)
obj-$(CONFIG_ARCH_OMAP2) += voltagedomains2xxx_data.o
obj-$(CONFIG_ARCH_OMAP3) += $(voltagedomain-common)
obj-$(CONFIG_ARCH_OMAP3) += voltagedomains3xxx_data.o
obj-$(CONFIG_ARCH_OMAP4) += $(voltagedomain-common)
obj-$(CONFIG_ARCH_OMAP4) += voltagedomains44xx_data.o
obj-$(CONFIG_SOC_AM33XX) += $(voltagedomain-common)
obj-$(CONFIG_SOC_AM43XX) += $(voltagedomain-common)
obj-$(CONFIG_SOC_OMAP5) += $(voltagedomain-common)
obj-$(CONFIG_SOC_OMAP5) += voltagedomains54xx_data.o
obj-$(CONFIG_SOC_DRA7XX) += $(voltagedomain-common)
# OMAP powerdomain framework
powerdomain-common += powerdomain.o powerdomain-common.o
obj-$(CONFIG_ARCH_OMAP2) += $(powerdomain-common)
obj-$(CONFIG_ARCH_OMAP2) += powerdomains2xxx_data.o
obj-$(CONFIG_ARCH_OMAP2) += powerdomains2xxx_3xxx_data.o
obj-$(CONFIG_ARCH_OMAP3) += $(powerdomain-common)
obj-$(CONFIG_ARCH_OMAP3) += powerdomains3xxx_data.o
obj-$(CONFIG_ARCH_OMAP3) += powerdomains2xxx_3xxx_data.o
obj-$(CONFIG_ARCH_OMAP4) += $(powerdomain-common)
obj-$(CONFIG_ARCH_OMAP4) += powerdomains44xx_data.o
obj-$(CONFIG_SOC_AM33XX) += $(powerdomain-common)
obj-$(CONFIG_SOC_AM33XX) += powerdomains33xx_data.o
obj-$(CONFIG_SOC_AM43XX) += $(powerdomain-common)
obj-$(CONFIG_SOC_AM43XX) += powerdomains43xx_data.o
obj-$(CONFIG_SOC_OMAP5) += $(powerdomain-common)
obj-$(CONFIG_SOC_OMAP5) += powerdomains54xx_data.o
obj-$(CONFIG_SOC_DRA7XX) += $(powerdomain-common)
obj-$(CONFIG_SOC_DRA7XX) += powerdomains7xx_data.o
# PRCM clockdomain control
clockdomain-common += clockdomain.o
obj-$(CONFIG_ARCH_OMAP2) += $(clockdomain-common)
obj-$(CONFIG_ARCH_OMAP2) += clockdomains2xxx_3xxx_data.o
obj-$(CONFIG_SOC_OMAP2420) += clockdomains2420_data.o
obj-$(CONFIG_SOC_OMAP2430) += clockdomains2430_data.o
obj-$(CONFIG_ARCH_OMAP3) += $(clockdomain-common)
obj-$(CONFIG_ARCH_OMAP3) += clockdomains2xxx_3xxx_data.o
obj-$(CONFIG_ARCH_OMAP3) += clockdomains3xxx_data.o
obj-$(CONFIG_ARCH_OMAP4) += $(clockdomain-common)
obj-$(CONFIG_ARCH_OMAP4) += clockdomains44xx_data.o
obj-$(CONFIG_SOC_AM33XX) += $(clockdomain-common)
obj-$(CONFIG_SOC_AM33XX) += clockdomains33xx_data.o
obj-$(CONFIG_SOC_TI81XX) += $(clockdomain-common)
obj-$(CONFIG_SOC_TI81XX) += clockdomains81xx_data.o
obj-$(CONFIG_SOC_AM43XX) += $(clockdomain-common)
obj-$(CONFIG_SOC_AM43XX) += clockdomains43xx_data.o
obj-$(CONFIG_SOC_OMAP5) += $(clockdomain-common)
obj-$(CONFIG_SOC_OMAP5) += clockdomains54xx_data.o
obj-$(CONFIG_SOC_DRA7XX) += $(clockdomain-common)
obj-$(CONFIG_SOC_DRA7XX) += clockdomains7xx_data.o
# Clock framework
obj-$(CONFIG_ARCH_OMAP2) += $(clock-common)
obj-$(CONFIG_ARCH_OMAP2) += clkt2xxx_dpllcore.o
obj-$(CONFIG_ARCH_OMAP2) += clkt2xxx_virt_prcm_set.o
obj-$(CONFIG_ARCH_OMAP2) += clkt2xxx_dpll.o
obj-$(CONFIG_ARCH_OMAP3) += $(clock-common)
obj-$(CONFIG_ARCH_OMAP4) += $(clock-common)
obj-$(CONFIG_SOC_AM33XX) += $(clock-common)
obj-$(CONFIG_SOC_OMAP5) += $(clock-common)
obj-$(CONFIG_SOC_DRA7XX) += $(clock-common)
obj-$(CONFIG_SOC_AM43XX) += $(clock-common)
# OMAP2 clock rate set data (old "OPP" data)
obj-$(CONFIG_SOC_OMAP2420) += opp2420_data.o
obj-$(CONFIG_SOC_OMAP2430) += opp2430_data.o
# hwmod data
obj-y += omap_hwmod_common_ipblock_data.o
obj-$(CONFIG_SOC_OMAP2420) += omap_hwmod_2xxx_ipblock_data.o
obj-$(CONFIG_SOC_OMAP2420) += omap_hwmod_2xxx_3xxx_ipblock_data.o
obj-$(CONFIG_SOC_OMAP2420) += omap_hwmod_2xxx_interconnect_data.o
obj-$(CONFIG_SOC_OMAP2420) += omap_hwmod_2420_data.o
obj-$(CONFIG_SOC_OMAP2430) += omap_hwmod_2xxx_ipblock_data.o
obj-$(CONFIG_SOC_OMAP2430) += omap_hwmod_2xxx_3xxx_ipblock_data.o
obj-$(CONFIG_SOC_OMAP2430) += omap_hwmod_2xxx_interconnect_data.o
obj-$(CONFIG_SOC_OMAP2430) += omap_hwmod_2430_data.o
obj-$(CONFIG_ARCH_OMAP3) += omap_hwmod_2xxx_3xxx_ipblock_data.o
obj-$(CONFIG_ARCH_OMAP3) += omap_hwmod_3xxx_data.o
obj-$(CONFIG_SOC_AM33XX) += omap_hwmod_33xx_data.o
obj-$(CONFIG_SOC_AM33XX) += omap_hwmod_33xx_43xx_interconnect_data.o
obj-$(CONFIG_SOC_AM33XX) += omap_hwmod_33xx_43xx_ipblock_data.o
obj-$(CONFIG_SOC_AM43XX) += omap_hwmod_43xx_data.o
obj-$(CONFIG_SOC_AM43XX) += omap_hwmod_33xx_43xx_interconnect_data.o
obj-$(CONFIG_SOC_AM43XX) += omap_hwmod_33xx_43xx_ipblock_data.o
obj-$(CONFIG_SOC_TI81XX) += omap_hwmod_81xx_data.o
obj-$(CONFIG_ARCH_OMAP4) += omap_hwmod_44xx_data.o
obj-$(CONFIG_SOC_OMAP5) += omap_hwmod_54xx_data.o
obj-$(CONFIG_SOC_DRA7XX) += omap_hwmod_7xx_data.o
# OMAP2420 MSDI controller integration support ("MMC")
obj-$(CONFIG_SOC_OMAP2420) += msdi.o
# Specific board support
obj-$(CONFIG_MACH_OMAP_GENERIC) += board-generic.o pdata-quirks.o
obj-$(CONFIG_MACH_NOKIA_N8X0) += board-n8x0.o
# Platform specific device init code
omap-hsmmc-$(CONFIG_MMC_OMAP_HS) := hsmmc.o
obj-y += $(omap-hsmmc-m) $(omap-hsmmc-y)
obj-y += omap_phy_internal.o
obj-$(CONFIG_MACH_OMAP2_TUSB6010) += usb-tusb6010.o
2019-08-22 20:58:08 -06:00
$(obj)/pm-asm-offsets.h: $(obj)/pm-asm-offsets.s FORCE
$(call filechk,offsets,__TI_PM_ASM_OFFSETS_H__)
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$(obj)/sleep33xx.o $(obj)/sleep43xx.o: $(obj)/pm-asm-offsets.h
targets += pm-asm-offsets.s
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clean-files += pm-asm-offsets.h
iommu/omap: fix boot issue on remoteprocs with AMMU/Unicache Support has been added to the OMAP IOMMU driver to fix a boot hang issue on OMAP remoteprocs with AMMU/Unicache, caused by an improper AMMU/Unicache state upon initial deassertion of the processor reset. The issue is described in detail in the next three paragraphs. All the Cortex M3/M4 IPU processor subsystems in OMAP SoCs have a AMMU/Unicache IP that dictates the memory attributes for addresses seen by the processor cores. The AMMU/Unicache is configured/enabled by the SCACHE_CONFIG.BYPASS bit - a value of 1 enables the cache and mandates all addresses accessed by M3/M4 be defined in the AMMU. This bit is not programmable from the host processor. The M3/M4 boot sequence starts out with the AMMU/Unicache in disabled state, and SYS/BIOS programs the AMMU regions and enables the Unicache during one of its initial boot steps. This SCACHE_CONFIG.BYPASS bit is however enabled by default whenever a RET reset is applied to the IP, irrespective of whether it was previously enabled or not. The AMMU registers lose their context whenever this reset is applied. The reset is effective as long as the MMU portion of the subsystem is enabled and clocked. This behavior is common to all the IPU and DSP subsystems that have an AMMU/Unicache. The IPU boot sequence involves enabling and programming the MMU, and loading the processor and releasing the reset(s) for the processor. The PM setup code currently sets the target state for most of the power domains to RET. The L2 MMU can be enabled, programmed and accessed properly just fine with the domain in hardware supervised mode, while the power domain goes through a RET->ON->RET transition during the programming sequence. However, the ON->RET transition asserts a RET reset, and the SCACHE_CONFIG.BYPASS bit gets auto-set. An AMMU fault is thrown immediately when the M3/M4 core's reset is released since the first instruction address itself will not be defined in any valid AMMU regions. The ON->RET transition happens automatically on the power domain after enabling the iommu due to the hardware supervised mode. This patch adds and invokes the .set_pwrdm_constraint pdata ops, if present, during the OMAP IOMMU enable and disable functions to resolve the above boot hang issue. The ops will allow to invoke a mach-omap2 layer API pwrdm_set_next_pwrst() in a multi-arch kernel environment. The ops also returns the current power domain state while enforcing the constraint so that the driver can store it and use it to set back the power domain state while releasing the constraint. The pdata ops implementation restricts the target power domain to ON during enable, and back to the original power domain state during disable, and thereby eliminating the conditions for the boot issue. The implementation is effective only when the original power domain state is either RET or OFF, and is a no-op when it is ON or INACTIVE. The .set_pwrdm_constraint ops need to be plugged in pdata-quirks for the affected remote processors to be able to boot properly. Note that the current issue is seen only on kernels with the affected power domains programmed to enter RET. For eg., IPU1 on DRA7xx is in a separate domain and is susceptible to this bug, while the IPU2 subsystem is within CORE power domain, and CORE RET is not supported on this SoC. IPUs on OMAP4 and OMAP5 are also susceptible since they are in CORE power domain, and CORE RET is a valid power target on these SoCs. Signed-off-by: Suman Anna <s-anna@ti.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2019-08-07 02:26:45 -06:00
obj-$(CONFIG_OMAP_IOMMU) += omap-iommu.o