kernel/arch/powerpc/sysdev/scom.c, branch linux-6.2.y

powerpc/powernv: Move SCOM access code into powernv platform

2019-08-05T08:53:03Z

The powernv platform is the only one that directly accesses SCOMs. Move the support code to platforms/powernv, and get rid of the PPC_SCOM Kconfig option, as SCOM support is always selected when compiling for powernv. This also means that the Kconfig item for CONFIG_SCOM_DEBUGFS will show up in menuconfig in the platform menu, rather than at the root, which is a much better location. Signed-off-by: Andrew Donnellan Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20190509051119.7694-1-ajd@linux.ibm.com

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156

2019-05-30T18:26:35Z

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 this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 59 temple place suite 330 boston ma 02111 1307 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1334 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Allison Randal Reviewed-by: Richard Fontana Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de Signed-off-by: Greg Kroah-Hartman

powerpc/scom: Return NULL instead of 0

2018-11-25T06:11:21Z

Function scom_map_device() returns data type 'scom_map_t', which is a typedef for 'void *'. This functions is currently returning NULL and zero, which causes the following warning by 'sparse': arch/powerpc/sysdev/scom.c:63:24: warning: Using plain integer as NULL pointer arch/powerpc/sysdev/scom.c:86:24: warning: Using plain integer as NULL pointer This patch simply replaces zero by NULL. Signed-off-by: Breno Leitao Signed-off-by: Michael Ellerman

powerpc: Convert to using %pOF instead of full_name

2017-08-23T12:27:04Z

Now that we have a custom printf format specifier, convert users of full_name to use %pOF instead. This is preparation to remove storing of the full path string for each node. Signed-off-by: Rob Herring Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Cc: Michael Ellerman Cc: Anatolij Gustschin Cc: Scott Wood Cc: Kumar Gala Cc: Arnd Bergmann Cc: linuxppc-dev@lists.ozlabs.org Reviewed-by: Tyrel Datwyler Signed-off-by: Michael Ellerman

powerpc: Create asm/debugfs.h and move powerpc_debugfs_root there

2017-04-10T21:46:03Z

powerpc_debugfs_root is the dentry representing the root of the "powerpc" directory tree in debugfs. Currently it sits in asm/debug.h, a long with some other things that have "debug" in the name, but are otherwise unrelated. Pull it out into a separate header, which also includes linux/debugfs.h, and convert all the users to include debugfs.h instead of debug.h. Signed-off-by: Michael Ellerman

Replace with globally

2016-12-24T19:46:01Z

This was entirely automated, using the script by Al: PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*' sed -i -e "s!$PATT!#include !" \ $(git grep -l "$PATT"|grep -v ^include/linux/uaccess.h) to do the replacement at the end of the merge window. Requested-by: Al Viro Signed-off-by: Linus Torvalds

powerpc/scom: Improve debugfs interface

2013-11-06T03:13:50Z

The current debugfs interface to scom is essentially unused and racy. It uses two different files "address" and "data" to perform accesses which is at best impractical for anything but manual use by a developer. This replaces it with an "access" file which represent the entire scom address space which can be lseek/read/writen too. This file only supports accesses that are 8 bytes aligned and multiple of 8 bytes in size. The offset is logically the SCOM address multiplied by 8. Since nothing in userspace exploits that file at the moment, the ABI change is a no-brainer. Signed-off-by: Benjamin Herrenschmidt

powerpc/scom: Use "devspec" rather than "path" in debugfs entries

2013-10-11T05:53:53Z

This is the traditional name for device-tree path, used in sysfs, do the same for the XSCOM debugfs files. Signed-off-by: Benjamin Herrenschmidt

powerpc/scom: Create debugfs files using ibm,chip-id if available

2013-10-11T05:53:41Z

When creating the debugfs scom files, use "ibm,chip-id" as the scom%d index rather than a simple made up number when possible. Signed-off-by: Benjamin Herrenschmidt

powerpc/scom: Add support for "reg" property

2013-10-11T05:53:37Z

When devices are direct children of a scom controller node, they should be able to use the normal "reg" property instead of "scom-reg". In that case, they also use #address-cells rather than #scom-cells to indicate the size of an entry. Signed-off-by: Benjamin Herrenschmidt