linux/arch/powerpc/platforms/cell/setup.c, branch master

powerpc/cell: Remove support for IBM Cell Blades

2025-02-26T15:45:07Z

IBM Cell Blades used the Cell processor and the "blade" server form factor. They were sold as models QS20, QS21 & QS22 from roughly 2006 to 2012 [1]. They were used in a few supercomputers (eg. Roadrunner) that have since been dismantled, and were not that widely used otherwise. Until recently I still had a working QS22, which meant I was able to keep the platform support working, but unfortunately that machine has now died. I'm not aware of any users. If there is a user that wants to keep the upstream support working, we can look at bringing some of the code back as appropriate. See previous discussion at [2]. Remove the top-level config symbol PPC_IBM_CELL_BLADE, and then the dependent symbols PPC_CELL_NATIVE, PPC_CELL_COMMON, CBE_RAS, PPC_IBM_CELL_RESETBUTTON, PPC_IBM_CELL_POWERBUTTON, CBE_THERM, and AXON_MSI. Then remove the associated C files and headers, and trim unused header content (some is shared with PS3). Note that PPC_CELL_COMMON sounds like it would build code shared with PS3, but it does not. It's a relic from when code was shared between the Blade support and QPACE support. Most of the primary authors already have CREDITS entries, with the exception of Christian, so add one for him. [1]: https://www.theregister.com/2011/06/28/ibm_kills_qs22_blade [2]: https://lore.kernel.org/linuxppc-dev/60581044-df82-40ad-b94c-56468007a93e@app.fastmail.com Acked-by: Arnd Bergmann Acked-by: Jeremy Kerr Acked-by: Segher Boessenkool Signed-off-by: Michael Ellerman Signed-off-by: Madhavan Srinivasan Link: https://patch.msgid.link/20241218105523.416573-1-mpe@ellerman.id.au

powerpc: Explicitly include correct DT includes

2023-08-02T12:22:19Z

The DT of_device.h and of_platform.h date back to the separate of_platform_bus_type before it as merged into the regular platform bus. As part of that merge prepping Arm DT support 13 years ago, they "temporarily" include each other. They also include platform_device.h and of.h. As a result, there's a pretty much random mix of those include files used throughout the tree. In order to detangle these headers and replace the implicit includes with struct declarations, users need to explicitly include the correct includes. Signed-off-by: Rob Herring [mpe: Fixup maple/setup.c which needs platform_device] Signed-off-by: Michael Ellerman Link: https://msgid.link/20230724210247.778034-1-robh@kernel.org

powerpc: Make generic_calibrate_decr() the default

2023-03-15T21:56:48Z

ppc_md.calibrate_decr() is a mandatory item. Its nullity is never checked so it must be non null on all platforms. Most platforms define generic_calibrate_decr() as their ppc_md.calibrate_decr(). Have time_init() call generic_calibrate_decr() when ppc_md.calibrate_decr() is NULL, and remove default assignment from all machines. Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://msgid.link/6cb9865d916231c38401ba34ad1a98c249fae135.1676711562.git.christophe.leroy@csgroup.eu

powerpc/cell: Add missing of_node_put()s

2022-09-05T07:28:26Z

Use of_node_put() for of_find_node_by_path() and of_find_node_by_phandle() to keep refcount balance. Signed-off-by: Liang He Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220619072335.4067728-1-windhl@126.com

powerpc: Remove asm/prom.h from all files that don't need it

2022-05-08T12:15:04Z

Several files include asm/prom.h for no reason. Clean it up. Signed-off-by: Christophe Leroy [mpe: Drop change to prom_parse.c as reported by lkp@intel.com] Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/7c9b8fda63dcf63e1b28f43e7ebdb95182cbc286.1646767214.git.christophe.leroy@csgroup.eu

mm: don't include asm/pgtable.h if linux/mm.h is already included

2020-06-09T16:39:13Z

Patch series "mm: consolidate definitions of page table accessors", v2. The low level page table accessors (pXY_index(), pXY_offset()) are duplicated across all architectures and sometimes more than once. For instance, we have 31 definition of pgd_offset() for 25 supported architectures. Most of these definitions are actually identical and typically it boils down to, e.g. static inline unsigned long pmd_index(unsigned long address) { return (address >> PMD_SHIFT) & (PTRS_PER_PMD - 1); } static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address) { return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address); } These definitions can be shared among 90% of the arches provided XYZ_SHIFT, PTRS_PER_XYZ and xyz_page_vaddr() are defined. For architectures that really need a custom version there is always possibility to override the generic version with the usual ifdefs magic. These patches introduce include/linux/pgtable.h that replaces include/asm-generic/pgtable.h and add the definitions of the page table accessors to the new header. This patch (of 12): The linux/mm.h header includes to allow inlining of the functions involving page table manipulations, e.g. pte_alloc() and pmd_alloc(). So, there is no point to explicitly include in the files that include . The include statements in such cases are remove with a simple loop: for f in $(git grep -l "include ") ; do sed -i -e '/include / d' $f done Signed-off-by: Mike Rapoport Signed-off-by: Andrew Morton Cc: Arnd Bergmann Cc: Borislav Petkov Cc: Brian Cain Cc: Catalin Marinas Cc: Chris Zankel Cc: "David S. Miller" Cc: Geert Uytterhoeven Cc: Greentime Hu Cc: Greg Ungerer Cc: Guan Xuetao Cc: Guo Ren Cc: Heiko Carstens Cc: Helge Deller Cc: Ingo Molnar Cc: Ley Foon Tan Cc: Mark Salter Cc: Matthew Wilcox Cc: Matt Turner Cc: Max Filippov Cc: Michael Ellerman Cc: Michal Simek Cc: Mike Rapoport Cc: Nick Hu Cc: Paul Walmsley Cc: Richard Weinberger Cc: Rich Felker Cc: Russell King Cc: Stafford Horne Cc: Thomas Bogendoerfer Cc: Thomas Gleixner Cc: Tony Luck Cc: Vincent Chen Cc: Vineet Gupta Cc: Will Deacon Cc: Yoshinori Sato Link: http://lkml.kernel.org/r/20200514170327.31389-1-rppt@kernel.org Link: http://lkml.kernel.org/r/20200514170327.31389-2-rppt@kernel.org Signed-off-by: Linus Torvalds

arch/powerpc/setup: Drop dummy_con initialization

2020-01-14T14:29:17Z

con_init in tty/vt.c will now set conswitchp to dummy_con if it's unset. Drop it from arch setup code. Signed-off-by: Arvind Sankar Link: https://lore.kernel.org/r/20191218214506.49252-18-nivedita@alum.mit.edu Signed-off-by: Greg Kroah-Hartman

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152

2019-05-30T18:26:32Z

Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Allison Randal Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman

powerpc: Use of_node_name_eq for node name comparisons

2018-12-22T10:29:50Z

Convert string compares of DT node names to use of_node_name_eq helper instead. This removes direct access to the node name pointer. A couple of open coded iterating thru the child node names are converted to use for_each_child_of_node() instead. Signed-off-by: Rob Herring Signed-off-by: Michael Ellerman

powerpc: Use device_type helpers to access the node type

2018-11-26T11:33:37Z

Remove directly accessing device_node.type pointer and use the accessors instead. This will eventually allow removing the type pointer. Replace the open coded iterating over child nodes with for_each_child_of_node() while we're here. Signed-off-by: Rob Herring Signed-off-by: Michael Ellerman