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path: root/drivers/acpi/device_sysfs.c
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2018-01-09treewide: Use DEVICE_ATTR_ROJoe Perches
Convert DEVICE_ATTR uses to DEVICE_ATTR_RO where possible. Done with perl script: $ git grep -w --name-only DEVICE_ATTR | \ xargs perl -i -e 'local $/; while (<>) { s/\bDEVICE_ATTR\s*\(\s*(\w+)\s*,\s*\(?(?:\s*S_IRUGO\s*|\s*0444\s*)\)?\s*,\s*\1_show\s*,\s*NULL\s*\)/DEVICE_ATTR_RO(\1)/g; print;}' Signed-off-by: Joe Perches <joe@perches.com> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Robert Jarzmik <robert.jarzmik@free.fr> Acked-by: Sagi Grimberg <sagi@grimberg.me> Acked-by: Zhang Rui <rui.zhang@intel.com> Acked-by: Harald Freudenberger <freude@linux.vnet.ibm.com> Acked-by: Jani Nikula <jani.nikula@intel.com> Acked-by: Corey Minyard <cminyard@mvista.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-20ACPI / bus: Leave modalias empty for devices which are not presentHans de Goede
Most Bay and Cherry Trail devices use a generic DSDT with all possible peripheral devices present in the DSDT, with their _STA returning 0x00 or 0x0f based on AML variables which describe what is actually present on the board. Since ACPI device objects with a 0x00 status (not present) still get an entry under /sys/bus/acpi/devices, and those entry had an acpi:PNPID modalias, userspace would end up loading modules for non present hardware. This commit fixes this by leaving the modalias empty for non present devices. This results in 10 modules less being loaded with a generic distro kernel config on my Cherry Trail test-device (a GPD pocket). Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-11-24ACPI / property: Hierarchical properties support updateRafael J. Wysocki
The definition document of the Hierarchical Properties Extension UUID for _DSD has been changed recently to allow local references to be used as sub-node link targets (previously, it only allowed strings to be used for that purpose). Update the code in drivers/acpi/property.c to reflect that change. Link: http://www.uefi.org/sites/default/files/resources/_DSD-hierarchical-data-extension-UUID-v1.1.pdf Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-05-04ACPI / device_sysfs: Clean up checkpatch errorsBetty Dall
Cleaning up two existing checkpatch errors (and 2 warnings) in device_sysfs.c since the file is being changed. The change in acpi_device_setup_files() is changing spaces to a tab. Signed-off-by: Betty Dall <betty.dall@hpe.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-05-04ACPI / device_sysfs: Change _SUN and _STA show functions error return to EIOBetty Dall
The error return from a sysfs show function is passed up through the call chain and visible as the return from the read system call. The show functions for the _STA and _SUN object currently return -ENODEV. This patch changes the return to -EIO. ENODEV makes less sense since the "device' exists or there wouldn't be a sysfs file. Signed-off-by: Betty Dall <betty.dall@hpe.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-05-04ACPI / device_sysfs: Add sysfs support for _HRV hardware revisionBetty Dall
The ACPI _HRV object on the device is used to supply Linux with the device's hardware revision. This is an optional object. Add sysfs support for the _HRV object if it exists on the device. This change allows users to easily find the hardware version of non-PCI hardware by looking at the sysfs 'hrv' file. It is most useful for non-PCI devices because lspci can list the hardware version for PCI devices. Signed-off-by: Betty Dall <betty.dall@hpe.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-01-08ACPI / property: avoid leaking format string into kobject nameKees Cook
The dn->name is expected to be used as a literal, so add the missing "%s". Fixes: 263b4c1a64bc (ACPI / property: Expose data-only subnodes via sysfs) Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-09-15ACPI / property: Expose data-only subnodes via sysfsRafael J. Wysocki
Add infrastructure needed to expose data-only subnodes of ACPI device objects introduced previously via sysfs. Each data-only subnode is represented as a sysfs directory under the directory corresponding to its parent object (a device or a data-only subnode). Each of them has a "path" attribute (containing the full ACPI namespace path to the object the subnode data come from) at this time. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2015-07-17ACPI / scan: Move sysfs-related device code to a separate fileRafael J. Wysocki
To reduce the size of scan.c and improve the readability of it, move all code related to device sysfs, modalias creation etc. to a new file called device_sysfs.c. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>