kernel/linux.git/arch/powerpc/sysdev/cpm_common.c, branch v6.12.80

powerpc: Explicitly include correct DT includes

2023-08-02T12:22:19+00:00

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

gpiolib: split of_mm_gpio_chip out of linux/of_gpio.h

2023-03-06T10:33:01+00:00

This is a rarely used feature that has nothing to do with the client-side of_gpio.h. Split it out with a separate header file and Kconfig option so it can be removed on its own timeline aside from removing the of_gpio consumer interfaces. Reviewed-by: Andy Shevchenko Signed-off-by: Arnd Bergmann Reviewed-by: Linus Walleij Signed-off-by: Andy Shevchenko

powerpc/8xx: Don't set IMMR map anymore at boot

2020-05-26T12:22:21+00:00

Only early debug requires IMMR to be mapped early. No need to set it up and pin it in assembly. Map it through page tables at udbg init when necessary. If CONFIG_PIN_TLB_IMMR is selected, pin it once we don't need the 32 Mb pinned RAM anymore. Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/13c1e8539fdf363d3146f4884e5c3c76c6c308b5.1589866984.git.christophe.leroy@csgroup.eu

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 206

2019-05-30T18:29:53+00:00

Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of version 2 of the gnu general public license as published by the free software foundation extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 107 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Allison Randal Reviewed-by: Richard Fontana Reviewed-by: Steve Winslow Reviewed-by: Alexios Zavras Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190528171438.615055994@linutronix.de Signed-off-by: Greg Kroah-Hartman

powerpc/sysdev: change CPM GPIO to platform_device

2018-01-21T05:29:02+00:00

Since commit 9427ecbed46cc ("gpio: Rework of_gpiochip_set_names() to use device property accessors"), gpio chips have to have a parent, otherwise devprop_gpiochip_set_names() prematurely exists with message "GPIO chip parent is NULL" and doesn't proceed 'gpio-line-names' DT property. This patch wraps the CPM GPIO into a platform driver to allow assignment of the parent device. Signed-off-by: Christophe Leroy Signed-off-by: Scott Wood

soc/fsl/qe: fix Oops on CPM1 (and likely CPM2)

2016-09-25T07:38:52+00:00

Commit 0e6e01ff694ee ("CPM/QE: use genalloc to manage CPM/QE muram") has changed the way muram is managed. genalloc uses kmalloc(), hence requires the SLAB to be up and running. On powerpc 8xx, cpm_reset() is called early during startup. cpm_reset() then calls cpm_muram_init() before SLAB is available, hence the following Oops. cpm_reset() cannot be called during initcalls because the CPM is needed for console. This patch removes the call to cpm_muram_init() from cpm_reset(). cpm_muram_init() will be called from a new function called cpm_init() which is declared as subsys_initcall, unless cpm_muram_alloc() is called earlier for the serial console in which case cpm_muram_init() will be called from there. The reason for calling it from two places is that some drivers (e.g. i2c-cpm) need some of the initialisations done by cpm_muram_init() but don't call cpm_muram_alloc(). The console driver calls cpm_muram_alloc() but some platforms might not use the CPM serial ports for console. [ 0.000000] Unable to handle kernel paging request for data at address 0x00000008 [ 0.000000] Faulting instruction address: 0xc01acce0 [ 0.000000] Oops: Kernel access of bad area, sig: 11 [#1] [ 0.000000] PREEMPT CMPC885 [ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 4.4.14-g0886ed8 #5 [ 0.000000] task: c05183e0 ti: c0536000 task.ti: c0536000 [ 0.000000] NIP: c01acce0 LR: c0011068 CTR: 00000000 [ 0.000000] REGS: c0537e50 TRAP: 0300 Not tainted (4.4.14-s3k-dev-g0886ed8-svn) [ 0.000000] MSR: 00001032 CR: 28044428 XER: 00000000 [ 0.000000] DAR: 00000008 DSISR: c0000000 GPR00: c0011068 c0537f00 c05183e0 00000000 00009000 ffffffff 00000bc0 ffffffff GPR08: ff003000 ff00b000 ff003bbf 00000000 22044422 100d43a8 00000000 07ff94e8 GPR16: 00000000 07bb5d70 00000000 07ff81f4 07ff81f4 07ff81f4 00000000 00000000 GPR24: 07ffb3a0 07fe7628 c0550000 c7ffa190 c0540000 ff003bbf 00000000 00000001 [ 0.000000] NIP [c01acce0] gen_pool_add_virt+0x14/0xdc [ 0.000000] LR [c0011068] cpm_muram_init+0xd4/0x18c [ 0.000000] Call Trace: [ 0.000000] [c0537f00] [00000200] 0x200 (unreliable) [ 0.000000] [c0537f20] [c0011068] cpm_muram_init+0xd4/0x18c [ 0.000000] [c0537f70] [c0494684] cpm_reset+0xb4/0xc8 [ 0.000000] [c0537f90] [c0494c64] cmpc885_setup_arch+0x10/0x30 [ 0.000000] [c0537fa0] [c0493cd4] setup_arch+0x130/0x168 [ 0.000000] [c0537fb0] [c04906bc] start_kernel+0x88/0x380 [ 0.000000] [c0537ff0] [c0002224] start_here+0x38/0x98 [ 0.000000] Instruction dump: [ 0.000000] 91430010 91430014 80010014 83e1000c 7c0803a6 38210010 4e800020 7c0802a6 [ 0.000000] 9421ffe0 bf61000c 90010024 7c7e1b78 <80630008> 7c9c2378 7cc31c30 3863001f [ 0.000000] ---[ end trace dc8fa200cb88537f ]--- fixes: 0e6e01ff694ee ("CPM/QE: use genalloc to manage CPM/QE muram") Cc: stable@vger.linux.org Signed-off-by: Christophe Leroy [scottwood: Removed some string changes unrelated to bugfix] Signed-off-by: Scott Wood

powerpc: sysdev: cpm: fix gpio save_regs functions

2016-08-22T01:09:33+00:00

of_mm_gpiochip_add_data() calls mm_gc->save_regs() before setting the data. Therefore ->save_regs() cannot use gpiochip_get_data() [ 0.275940] Unable to handle kernel paging request for data at address 0x00000130 [ 0.283120] Faulting instruction address: 0xc01b44cc [ 0.288175] Oops: Kernel access of bad area, sig: 11 [#1] [ 0.293343] PREEMPT CMPC885 [ 0.296141] CPU: 0 PID: 1 Comm: swapper Not tainted 4.7.0-g65124df-dirty #68 [ 0.304131] task: c6074000 ti: c6080000 task.ti: c6080000 [ 0.309459] NIP: c01b44cc LR: c0011720 CTR: c0011708 [ 0.314372] REGS: c6081d90 TRAP: 0300 Not tainted (4.7.0-g65124df-dirty) [ 0.322267] MSR: 00009032 CR: 24000028 XER: 20000000 [ 0.328813] DAR: 00000130 DSISR: c0000000 GPR00: c01b6d0c c6081e40 c6074000 c6017000 c9028000 c601d028 c6081dd8 00000000 GPR08: c601d028 00000000 ffffffff 00000001 24000044 00000000 c0002790 00000000 GPR16: 00000000 00000000 00000000 00000000 00000000 00000000 c05643b0 00000083 GPR24: c04a1a6c c0560000 c04a8308 c04c6480 c0012498 c6017000 c7ffcc78 c6017000 [ 0.360806] NIP [c01b44cc] gpiochip_get_data+0x4/0xc [ 0.365684] LR [c0011720] cpm1_gpio16_save_regs+0x18/0x44 [ 0.370972] Call Trace: [ 0.373451] [c6081e50] [c01b6d0c] of_mm_gpiochip_add_data+0x70/0xdc [ 0.379624] [c6081e70] [c00124c0] cpm_init_par_io+0x28/0x118 [ 0.385238] [c6081e80] [c04a8ac0] do_one_initcall+0xb0/0x17c [ 0.390819] [c6081ef0] [c04a8cbc] kernel_init_freeable+0x130/0x1dc [ 0.396924] [c6081f30] [c00027a4] kernel_init+0x14/0x110 [ 0.402177] [c6081f40] [c000b424] ret_from_kernel_thread+0x5c/0x64 [ 0.408233] Instruction dump: [ 0.411168] 4182fafc 3f80c040 48234c6d 3bc0fff0 3b9c5ed0 4bfffaf4 81290020 712a0004 [ 0.418825] 4182fb34 48234c51 4bfffb2c 81230004 <80690130> 4e800020 7c0802a6 9421ffe0 [ 0.426763] ---[ end trace fe4113ee21d72ffa ]--- fixes: e65078f1f3490 ("powerpc: sysdev: cpm1: use gpiochip data pointer") fixes: a14a2d484b386 ("powerpc: cpm_common: use gpiochip data pointer") Cc: stable@vger.kernel.org Signed-off-by: Christophe Leroy Reviewed-by: Linus Walleij Signed-off-by: Benjamin Herrenschmidt

powerpc/8xx: Fix vaddr for IMMR early remap

2016-07-09T07:02:48+00:00

Memory: 124428K/131072K available (3748K kernel code, 188K rwdata, 648K rodata, 508K init, 290K bss, 6644K reserved) Kernel virtual memory layout: * 0xfffdf000..0xfffff000 : fixmap * 0xfde00000..0xfe000000 : consistent mem * 0xfddf6000..0xfde00000 : early ioremap * 0xc9000000..0xfddf6000 : vmalloc & ioremap SLUB: HWalign=16, Order=0-3, MinObjects=0, CPUs=1, Nodes=1 Today, IMMR is mapped 1:1 at startup Mapping IMMR 1:1 is just wrong because it may overlap with another area. On most mpc8xx boards it is OK as IMMR is set to 0xff000000 but for instance on EP88xC board, IMMR is at 0xfa200000 which overlaps with VM ioremap area This patch fixes the virtual address for remapping IMMR with the fixmap regardless of the value of IMMR. The size of IMMR area is 256kbytes (CPM at offset 0, security engine at offset 128k) so a 512k page is enough Signed-off-by: Christophe Leroy Signed-off-by: Scott Wood

powerpc: cpm_common: use gpiochip data pointer

2016-03-30T08:52:37+00:00

This makes the driver use the data pointer added to the gpio_chip to store a pointer to the state container instead of relying on container_of(). Cc: Anatolij Gustschin Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Cc: Michael Ellerman Signed-off-by: Linus Walleij

QE: Move QE from arch/powerpc to drivers/soc

2015-12-22T23:12:56+00:00

ls1 has qe and ls1 has arm cpu. move qe from arch/powerpc to drivers/soc/fsl to adapt to powerpc and arm Signed-off-by: Zhao Qiang Signed-off-by: Scott Wood