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https://github.com/edk2-porting/linux-next.git
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ca0cd118a1
Determining which kernel config options need to be enabled for a given devicetree can be a painful process. Create a new tool to find the drivers that may match a devicetree node compatible, find the kernel config options that enable the driver, and optionally report whether the kernel config option is enabled. Signed-off-by: Gaurav Minocha <gaurav.minocha.os@gmail.com> Signed-off-by: Frank Rowand <frank.rowand@am.sony.com> Signed-off-by: Rob Herring <robh@kernel.org>
1214 lines
41 KiB
Perl
Executable File
1214 lines
41 KiB
Perl
Executable File
#!/usr/bin/perl
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# Copyright 2016 by Frank Rowand
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# Copyright 2016 by Gaurav Minocha
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#
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# This file is subject to the terms and conditions of the GNU General Public
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# License v2.
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use strict 'refs';
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use strict subs;
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use Getopt::Long;
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$VUFX = "160610a";
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$script_name = $0;
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$script_name =~ s|^.*/||;
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# ----- constants for print_flags()
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# Position in string $pr_flags. Range of 0..($num_pr_flags - 1).
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$pr_flag_pos_mcompatible = 0;
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$pr_flag_pos_driver = 1;
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$pr_flag_pos_mdriver = 2;
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$pr_flag_pos_config = 3;
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$pr_flag_pos_mconfig = 4;
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$pr_flag_pos_node_not_enabled = 5;
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$pr_flag_pos_white_list = 6;
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$pr_flag_pos_hard_coded = 7;
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$pr_flag_pos_config_hard_coded = 8;
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$pr_flag_pos_config_none = 9;
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$pr_flag_pos_config_m = 10;
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$pr_flag_pos_config_y = 11;
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$pr_flag_pos_config_test_fail = 12;
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$num_pr_flags = $pr_flag_pos_config_test_fail + 1;
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# flags in @pr_flag_value must be unique values to allow simple regular
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# expessions to work for --include_flags and --exclude_flags.
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# Convention: use upper case letters for potential issues or problems.
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@pr_flag_value = ('M', 'd', 'D', 'c', 'C', 'E', 'W', 'H', 'x', 'n', 'm', 'y', 'F');
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@pr_flag_help = (
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"multiple compatibles found for this node",
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"driver found for this compatible",
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"multiple drivers found for this compatible",
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"kernel config found for this driver",
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"multiple config options found for this driver",
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"node is not enabled",
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"compatible is white listed",
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"matching driver and/or kernel config is hard coded",
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"kernel config hard coded in Makefile",
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"one or more kernel config file options is not set",
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"one or more kernel config file options is set to 'm'",
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"one or more kernel config file options is set to 'y'",
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"one of more kernel config file options fails to have correct value"
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);
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# -----
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%driver_config = (); # driver config array, indexed by driver source file
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%driver_count = (); # driver_cnt, indexed by compatible
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%compat_driver = (); # compatible driver array, indexed by compatible
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%existing_config = (); # existing config symbols present in given config file
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# expected values are: "y", "m", a decimal number, a
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# hex number, or a string
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# ----- magic compatibles, do not have a driver
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#
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# Will not search for drivers for these compatibles.
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%compat_white_list = (
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'none' => '1',
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'pci' => '1',
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'simple-bus' => '1',
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);
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# Will not search for drivers for these compatibles.
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#
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# These compatibles have a very large number of false positives.
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#
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# 'hardcoded_no_driver' is a magic value. Other code knows this
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# magic value. Do not use 'no_driver' here!
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#
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# Revisit each 'hardcoded_no_driver' to see how the compatible
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# is used. Are there drivers that can be provided?
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%driver_hard_code_list = (
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'cache' => ['hardcoded_no_driver'],
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'eeprom' => ['hardcoded_no_driver'],
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'gpio' => ['hardcoded_no_driver'],
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'gpio-keys' => ['drivers/input/keyboard/gpio_keys.c'],
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'i2c-gpio' => ['drivers/i2c/busses/i2c-gpio.c'],
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'isa' => ['arch/mips/mti-malta/malta-dt.c',
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'arch/x86/kernel/devicetree.c'],
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'led' => ['hardcoded_no_driver'],
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'm25p32' => ['hardcoded_no_driver'],
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'm25p64' => ['hardcoded_no_driver'],
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'm25p80' => ['hardcoded_no_driver'],
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'mtd-ram' => ['drivers/mtd/maps/physmap_of.c'],
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'pwm-backlight' => ['drivers/video/backlight/pwm_bl.c'],
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'spidev' => ['hardcoded_no_driver'],
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'syscon' => ['drivers/mfd/syscon.c'],
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'tlv320aic23' => ['hardcoded_no_driver'],
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'wm8731' => ['hardcoded_no_driver'],
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);
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# Use these config options instead of searching makefiles
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%driver_config_hard_code_list = (
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# this one needed even if %driver_hard_code_list is empty
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'no_driver' => ['no_config'],
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'hardcoded_no_driver' => ['no_config'],
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# drivers/usb/host/ehci-ppc-of.c
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# drivers/usb/host/ehci-xilinx-of.c
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# are included from:
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# drivers/usb/host/ehci-hcd.c
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# thus the search of Makefile for the included .c files is incorrect
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# ehci-hcd.c wraps the includes with ifdef CONFIG_USB_EHCI_HCD_..._OF
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#
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# similar model for ohci-hcd.c (but no ohci-xilinx-of.c)
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#
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# similarly, uhci-hcd.c includes uhci-platform.c
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'drivers/usb/host/ehci-ppc-of.c' => ['CONFIG_USB_EHCI_HCD',
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'CONFIG_USB_EHCI_HCD_PPC_OF'],
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'drivers/usb/host/ohci-ppc-of.c' => ['CONFIG_USB_OHCI_HCD',
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'CONFIG_USB_OHCI_HCD_PPC_OF'],
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'drivers/usb/host/ehci-xilinx-of.c' => ['CONFIG_USB_EHCI_HCD',
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'CONFIG_USB_EHCI_HCD_XILINX'],
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'drivers/usb/host/uhci-platform.c' => ['CONFIG_USB_UHCI_HCD',
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'CONFIG_USB_UHCI_PLATFORM'],
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# scan_makefile will find only one of these config options:
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# ifneq ($(CONFIG_SOC_IMX6)$(CONFIG_SOC_LS1021A),)
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'arch/arm/mach-imx/platsmp.c' => ['CONFIG_SOC_IMX6 && CONFIG_SMP',
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'CONFIG_SOC_LS1021A && CONFIG_SMP'],
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);
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# 'virt/kvm/arm/.*' are controlled by makefiles in other directories,
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# using relative paths, such as 'KVM := ../../../virt/kvm'. Do not
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# add complexity to find_kconfig() to deal with this. There is a long
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# term intent to change the kvm related makefiles to the normal kernel
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# style. After that is done, this entry can be removed from the
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# black_list_driver.
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@black_list_driver = (
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# kvm no longer a problem after commit 503a62862e8f in 4.7-rc1
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# 'virt/kvm/arm/.*',
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);
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sub usage()
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{
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print
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"
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Usage: $script_name [options] device-tree...
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device_tree is: dts_file | dtb_file | proc_device-tree
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Valid options:
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-c FILE Read kernel config options from FILE
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--config FILE synonym for 'c'
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--config-format config file friendly output format
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--exclude-flag FLAG exclude entries with a matching flag
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-h Display this message and exit
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--help synonym for 'h'
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--black-list-driver use driver black list
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--white-list-config use config white list
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--white-list-driver use driver white list
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--include-flag FLAG include only entries with a matching flag
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--include-suspect include only entries with an uppercase flag
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--short-name do not show the path portion of the node name
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--show-lists report of white and black lists
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--version Display program version and exit
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Report driver source files that match the compatibles in the device
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tree file and the kernel config options that enable the driver source
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files.
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This program must be run in the root directory of a Linux kernel
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source tree.
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The default format is a report that is intended to be easily human
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scannable.
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An alternate format can be selected by --config-format. This will
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create output that can easily be edited to create a fragment that can
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be appended to the existing kernel config file. Each entry consists of
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multiple lines. The first line reports flags, the node path, compatible
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value, driver file matching the compatible, configuration options, and
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current values of the configuration options. For each configuration
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option, the following lines report the current value and the value that
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is required for the driver file to be included in the kernel.
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If a large number of drivers or config options is listed for a node,
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and the '$pr_flag_value[$pr_flag_pos_hard_coded]' flag is set consider using --white-list-config and/or
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--white-list-driver. If the white list option suppresses the correct
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entry please report that as a bug.
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CAUTION:
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This program uses heuristics to guess which driver(s) support each
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compatible string and which config option(s) enables the driver(s).
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Do not believe that the reported information is fully correct.
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This program is intended to aid the process of determining the
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proper kernel configuration for a device tree, but this is not
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a fully automated process -- human involvement may still be
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required!
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The driver match heuristic used is to search for source files
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containing the compatible string enclosed in quotes.
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This program might not be able to find all drivers matching a
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compatible string.
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Some makefiles are overly clever. This program was not made
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complex enough to handle them. If no config option is listed
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for a driver, look at the makefile for the driver source file.
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Even if a config option is listed for a driver, some other
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available config options may not be listed.
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FLAG values:
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";
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for ($k = 0; $k < $num_pr_flags; $k++) {
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printf " %s %s\n", $pr_flag_value[$k], $pr_flag_help[$k];
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}
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print
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"
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Upper case letters indicate potential issues or problems.
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The flag:
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";
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$k = $pr_flag_pos_hard_coded;
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printf " %s %s\n", $pr_flag_value[$k], $pr_flag_help[$k];
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print
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"
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will be set if the config or driver is in the white lists, even if
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--white-list-config and --white-list-driver are not specified.
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This is a hint that 1) many of these reported lines are likely to
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be incorrect, and 2) using those options will reduce the number of
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drivers and/or config options reported.
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--white-list-config and --white-list-driver may not be accurate if this
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program is not well maintained. Use them with appropriate skepticism.
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Use the --show-lists option to report the values in the list.
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Return value:
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0 if no error
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1 error processing command line
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2 unable to open or read kernel config file
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3 unable to open or process input device tree file(s)
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EXAMPLES:
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dt_to_config arch/arm/boot/dts/my_dts_file.dts
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Basic report.
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dt_to_config \\
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--config \${KBUILD_OUTPUT}/.config \\
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arch/\${ARCH}/boot/dts/my_dts_file.dts
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Full report, with config file issues noted.
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dt_to_config --include-suspect \\
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--config \${KBUILD_OUTPUT}/.config \\
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arch/\${ARCH}/boot/dts/my_dts_file.dts
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Report of node / compatible string / driver tuples that should
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be further investigated. A node may have multiple compatible
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strings. A compatible string may be matched by multiple drivers.
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A driver may have config file issues noted. The compatible string
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and/or driver may be in the white lists.
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dt_to_config --include-suspect --config-format \\
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--config ${KBUILD_OUTPUT}/.config \\
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arch/\${ARCH}/boot/dts/my_dts_file.dts
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Report of node / compatible string / driver tuples that should
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be further investigated. The report can be edited to uncomment
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the config options to select the desired tuple for a given node.
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A node may have multiple compatible strings. A compatible string
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may be matched by multiple drivers. A driver may have config file
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issues noted. The compatible string and/or driver may be in the
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white lists.
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";
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}
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sub set_flag()
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{
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# pr_flags_ref is a reference to $pr_flags
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my $pr_flags_ref = shift;
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my $pos = shift;
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substr $$pr_flags_ref, $pos, 1, $pr_flag_value[$pos];
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return $pr_flags;
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}
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sub print_flags()
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{
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# return 1 if anything printed, else 0
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# some fields of pn_arg_ref might not be used in this function, but
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# extract all of them anyway.
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my $pn_arg_ref = shift;
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my $compat = $pn_arg_ref->{compat};
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my $compatible_cnt = $pn_arg_ref->{compatible_cnt};
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my $config = $pn_arg_ref->{config};
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my $config_cnt = $pn_arg_ref->{config_cnt};
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my $driver = $pn_arg_ref->{driver};
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my $driver_cnt = $pn_arg_ref->{driver_cnt};
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my $full_node = $pn_arg_ref->{full_node};
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my $node = $pn_arg_ref->{node};
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my $node_enabled = $pn_arg_ref->{node_enabled};
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my $white_list = $pn_arg_ref->{white_list};
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my $pr_flags = '-' x $num_pr_flags;
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# ----- set flags in $pr_flags
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if ($compatible_cnt > 1) {
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&set_flag(\$pr_flags, $pr_flag_pos_mcompatible);
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}
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if ($config_cnt > 1) {
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&set_flag(\$pr_flags, $pr_flag_pos_mconfig);
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}
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if ($driver_cnt >= 1) {
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&set_flag(\$pr_flags, $pr_flag_pos_driver);
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}
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if ($driver_cnt > 1) {
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&set_flag(\$pr_flags, $pr_flag_pos_mdriver);
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}
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# These strings are the same way the linux kernel tests.
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# The ePapr lists of values is slightly different.
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if (!(
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($node_enabled eq "") ||
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($node_enabled eq "ok") ||
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($node_enabled eq "okay")
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)) {
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&set_flag(\$pr_flags, $pr_flag_pos_node_not_enabled);
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}
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if ($white_list) {
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&set_flag(\$pr_flags, $pr_flag_pos_white_list);
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}
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if (exists($driver_hard_code_list{$compat}) ||
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(exists($driver_config_hard_code_list{$driver}) &&
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($driver ne "no_driver"))) {
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&set_flag(\$pr_flags, $pr_flag_pos_hard_coded);
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}
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my @configs = split(' && ', $config);
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for $configs (@configs) {
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$not = $configs =~ /^!/;
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$configs =~ s/^!//;
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if (($configs ne "no_config") && ($configs ne "no_makefile")) {
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&set_flag(\$pr_flags, $pr_flag_pos_config);
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}
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if (($config_cnt >= 1) &&
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($configs !~ /CONFIG_/) &&
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(($configs ne "no_config") && ($configs ne "no_makefile"))) {
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&set_flag(\$pr_flags, $pr_flag_pos_config_hard_coded);
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}
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my $existing_config = $existing_config{$configs};
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if ($existing_config eq "m") {
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&set_flag(\$pr_flags, $pr_flag_pos_config_m);
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# Possible fail, depends on whether built in or
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# module is desired.
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&set_flag(\$pr_flags, $pr_flag_pos_config_test_fail);
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} elsif ($existing_config eq "y") {
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&set_flag(\$pr_flags, $pr_flag_pos_config_y);
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if ($not) {
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&set_flag(\$pr_flags, $pr_flag_pos_config_test_fail);
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}
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} elsif (($config_file) && ($configs =~ /CONFIG_/)) {
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&set_flag(\$pr_flags, $pr_flag_pos_config_none);
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if (!$not) {
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&set_flag(\$pr_flags, $pr_flag_pos_config_test_fail);
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}
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}
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}
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# ----- include / exclude filters
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if ($include_flag_pattern && ($pr_flags !~ m/$include_flag_pattern/)) {
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return 0;
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}
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if ($exclude_flag_pattern && ($pr_flags =~ m/$exclude_flag_pattern/)) {
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return 0;
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}
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if ($config_format) {
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print "# ";
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}
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print "$pr_flags : ";
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return 1;
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}
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sub print_node()
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{
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# return number of lines printed
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# some fields of pn_arg_ref might not be used in this function, but
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# extract all of them anyway.
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my $pn_arg_ref = shift;
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my $compat = $pn_arg_ref->{compat};
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my $compatible_cnt = $pn_arg_ref->{compatible_cnt};
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my $config = $pn_arg_ref->{config};
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my $config_cnt = $pn_arg_ref->{config_cnt};
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my $driver = $pn_arg_ref->{driver};
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my $driver_cnt = $pn_arg_ref->{driver_cnt};
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my $full_node = $pn_arg_ref->{full_node};
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my $node = $pn_arg_ref->{node};
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my $node_enabled = $pn_arg_ref->{node_enabled};
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my $white_list = $pn_arg_ref->{white_list};
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my $separator;
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if (! &print_flags($pn_arg_ref)) {
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return 0;
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}
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if ($short_name) {
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print "$node";
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} else {
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print "$full_node";
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}
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print " : $compat : $driver : $config : ";
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my @configs = split(' && ', $config);
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if ($config_file) {
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for $configs (@configs) {
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$configs =~ s/^!//;
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my $existing_config = $existing_config{$configs};
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if (!$existing_config) {
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# check for /-m/, /-y/, or /-objs/
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if ($configs !~ /CONFIG_/) {
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$existing_config = "x";
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};
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};
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if ($existing_config) {
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print "$separator", "$existing_config";
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$separator = ", ";
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} else {
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print "$separator", "n";
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$separator = ", ";
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}
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}
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} else {
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print "none";
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}
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|
|
print "\n";
|
|
|
|
if ($config_format) {
|
|
for $configs (@configs) {
|
|
$not = $configs =~ /^!/;
|
|
$configs =~ s/^!//;
|
|
my $existing_config = $existing_config{$configs};
|
|
|
|
if ($not) {
|
|
if ($configs !~ /CONFIG_/) {
|
|
print "# $configs\n";
|
|
} elsif ($existing_config eq "m") {
|
|
print "# $configs is m\n";
|
|
print "# $configs=n\n";
|
|
} elsif ($existing_config eq "y") {
|
|
print "# $configs is set\n";
|
|
print "# $configs=n\n";
|
|
} else {
|
|
print "# $configs is not set\n";
|
|
print "# $configs=n\n";
|
|
}
|
|
|
|
} else {
|
|
if ($configs !~ /CONFIG_/) {
|
|
print "# $configs\n";
|
|
} elsif ($existing_config eq "m") {
|
|
print "# $configs is m\n";
|
|
print "# $configs=y\n";
|
|
} elsif ($existing_config eq "y") {
|
|
print "# $configs is set\n";
|
|
print "# $configs=y\n";
|
|
} else {
|
|
print "# $configs is not set\n";
|
|
print "# $configs=y\n";
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
|
|
sub scan_makefile
|
|
{
|
|
my $pn_arg_ref = shift;
|
|
my $driver = shift;
|
|
|
|
# ----- Find Kconfig symbols that enable driver
|
|
|
|
my ($dir, $base) = $driver =~ m{(.*)/(.*).c};
|
|
|
|
my $makefile = $dir . "/Makefile";
|
|
if (! -r $makefile) {
|
|
$makefile = $dir . "/Kbuild";
|
|
}
|
|
if (! -r $makefile) {
|
|
my $config;
|
|
|
|
$config = 'no_makefile';
|
|
push @{ $driver_config{$driver} }, $config;
|
|
return;
|
|
}
|
|
|
|
if (!open(MAKEFILE_FILE, "<", "$makefile")) {
|
|
return;
|
|
}
|
|
|
|
my $line;
|
|
my @config;
|
|
my @if_config;
|
|
my @make_var;
|
|
|
|
NEXT_LINE:
|
|
while ($next_line = <MAKEFILE_FILE>) {
|
|
my $config;
|
|
my $if_config;
|
|
my $ifdef;
|
|
my $ifeq;
|
|
my $ifndef;
|
|
my $ifneq;
|
|
my $ifdef_config;
|
|
my $ifeq_config;
|
|
my $ifndef_config;
|
|
my $ifneq_config;
|
|
|
|
chomp($next_line);
|
|
$line = $line . $next_line;
|
|
if ($next_line =~ /\\$/) {
|
|
$line =~ s/\\$/ /;
|
|
next NEXT_LINE;
|
|
}
|
|
if ($line =~ /^\s*#/) {
|
|
$line = "";
|
|
next NEXT_LINE;
|
|
}
|
|
|
|
# ----- condition ... else ... endif
|
|
|
|
if ($line =~ /^([ ]\s*|)else\b/) {
|
|
$if_config = "!" . pop @if_config;
|
|
$if_config =~ s/^!!//;
|
|
push @if_config, $if_config;
|
|
$line =~ s/^([ ]\s*|)else\b//;
|
|
}
|
|
|
|
($null, $ifeq_config, $ifeq_config_val ) = $line =~ /^([ ]\s*|)ifeq\b.*\b(CONFIG_[A-Za-z0-9_]*)(.*)/;
|
|
($null, $ifneq_config, $ifneq_config_val) = $line =~ /^([ ]\s*|)ifneq\b.*\b(CONFIG_[A-Za-z0-9_]*)(.*)/;
|
|
($null, $ifdef_config) = $line =~ /^([ ]\s*|)ifdef\b.*\b(CONFIG_[A-Za-z0-9_]*)/;
|
|
($null, $ifndef_config) = $line =~ /^([ ]\s*|)ifndef\b.*\b(CONFIG_[A-Za-z0-9_]*)/;
|
|
|
|
($null, $ifeq) = $line =~ /^([ ]\s*|)ifeq\b\s*(.*)/;
|
|
($null, $ifneq) = $line =~ /^([ ]\s*|)ifneq\b\s*(.*)/;
|
|
($null, $ifdef) = $line =~ /^([ ]\s*|)ifdef\b\s*(.*)/;
|
|
($null, $ifndef) = $line =~ /^([ ]\s*|)ifndef\b\s*(.*)/;
|
|
|
|
# Order of tests is important. Prefer "CONFIG_*" regex match over
|
|
# less specific regex match.
|
|
if ($ifdef_config) {
|
|
$if_config = $ifdef_config;
|
|
} elsif ($ifeq_config) {
|
|
if ($ifeq_config_val =~ /y/) {
|
|
$if_config = $ifeq_config;
|
|
} else {
|
|
$if_config = "!" . $ifeq_config;
|
|
}
|
|
} elsif ($ifndef_config) {
|
|
$if_config = "!" . $ifndef_config;
|
|
} elsif ($ifneq_config) {
|
|
if ($ifneq_config_val =~ /y/) {
|
|
$if_config = "!" . $ifneq_config;
|
|
} else {
|
|
$if_config = $ifneq_config;
|
|
}
|
|
} elsif ($ifdef) {
|
|
$if_config = $ifdef;
|
|
} elsif ($ifeq) {
|
|
$if_config = $ifeq;
|
|
} elsif ($ifndef) {
|
|
$if_config = "!" . $ifndef;
|
|
} elsif ($ifneq) {
|
|
$if_config = "!" . $ifneq;
|
|
} else {
|
|
$if_config = "";
|
|
}
|
|
$if_config =~ s/^!!//;
|
|
|
|
if ($if_config) {
|
|
push @if_config, $if_config;
|
|
$line = "";
|
|
next NEXT_LINE;
|
|
}
|
|
|
|
if ($line =~ /^([ ]\s*|)endif\b/) {
|
|
pop @if_config;
|
|
$line = "";
|
|
next NEXT_LINE;
|
|
}
|
|
|
|
# ----- simple CONFIG_* = *.[co] or xxx [+:?]*= *.[co]
|
|
# Most makefiles select on *.o, but
|
|
# arch/powerpc/boot/Makefile selects on *.c
|
|
|
|
($config) = $line =~ /(CONFIG_[A-Za-z0-9_]+).*\b$base.[co]\b/;
|
|
|
|
# ----- match a make variable instead of *.[co]
|
|
# Recursively expanded variables are not handled.
|
|
|
|
if (!$config) {
|
|
my $make_var;
|
|
($make_var) = $line =~ /\s*(\S+?)\s*[+:\?]*=.*\b$base.[co]\b/;
|
|
if ($make_var) {
|
|
if ($make_var =~ /[a-zA-Z0-9]+-[ym]/) {
|
|
$config = $make_var;
|
|
} elsif ($make_var =~ /[a-zA-Z0-9]+-objs/) {
|
|
$config = $make_var;
|
|
} else {
|
|
push @make_var, $make_var;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!$config) {
|
|
for $make_var (@make_var) {
|
|
($config) = $line =~ /(CONFIG_[A-Za-z0-9_]+).*\b$make_var\b/;
|
|
last if ($config);
|
|
}
|
|
}
|
|
|
|
if (!$config) {
|
|
for $make_var (@make_var) {
|
|
($config) = $line =~ /\s*(\S+?)\s*[+:\?]*=.*\b$make_var\b/;
|
|
last if ($config);
|
|
}
|
|
}
|
|
|
|
# ----- next if no config found
|
|
|
|
if (!$config) {
|
|
$line = "";
|
|
next NEXT_LINE;
|
|
}
|
|
|
|
for $if_config (@if_config) {
|
|
$config = $if_config . " && " . $config;
|
|
}
|
|
|
|
push @{ $driver_config{$driver} }, $config;
|
|
|
|
$line = "";
|
|
}
|
|
|
|
close(MAKEFILE_FILE);
|
|
|
|
}
|
|
|
|
|
|
sub find_kconfig
|
|
{
|
|
my $pn_arg_ref = shift;
|
|
my $driver = shift;
|
|
|
|
my $lines_printed = 0;
|
|
my @configs;
|
|
|
|
if (!@{ $driver_config{$driver} }) {
|
|
&scan_makefile($pn_arg_ref, $driver);
|
|
if (!@{ $driver_config{$driver} }) {
|
|
push @{ $driver_config{$driver} }, "no_config";
|
|
}
|
|
}
|
|
|
|
@configs = @{ $driver_config{$driver} };
|
|
|
|
$$pn_arg_ref{config_cnt} = $#configs + 1;
|
|
for my $config (@configs) {
|
|
$$pn_arg_ref{config} = $config;
|
|
$lines_printed += &print_node($pn_arg_ref);
|
|
}
|
|
|
|
return $lines_printed;
|
|
}
|
|
|
|
|
|
sub handle_compatible()
|
|
{
|
|
my $full_node = shift;
|
|
my $node = shift;
|
|
my $compatible = shift;
|
|
my $node_enabled = shift;
|
|
|
|
my $compat;
|
|
my $lines_printed = 0;
|
|
my %pn_arg = ();
|
|
|
|
return if (!$node or !$compatible);
|
|
|
|
# Do not process compatible property of root node,
|
|
# it is used to match board, not to bind a driver.
|
|
return if ($node eq "/");
|
|
|
|
$pn_arg{full_node} = $full_node;
|
|
$pn_arg{node} = $node;
|
|
$pn_arg{node_enabled} = $node_enabled;
|
|
|
|
my @compatibles = split('", "', $compatible);
|
|
|
|
$compatibles[0] =~ s/^"//;
|
|
$compatibles[$#compatibles] =~ s/"$//;
|
|
|
|
$pn_arg{compatible_cnt} = $#compatibles + 1;
|
|
|
|
COMPAT:
|
|
for $compat (@compatibles) {
|
|
|
|
$pn_arg{compat} = $compat;
|
|
$pn_arg{driver_cnt} = 0;
|
|
$pn_arg{white_list} = 0;
|
|
|
|
if (exists($compat_white_list{$compat})) {
|
|
$pn_arg{white_list} = 1;
|
|
$pn_arg{driver} = "no_driver";
|
|
$pn_arg{config_cnt} = 1;
|
|
$pn_arg{config} = "no_config";
|
|
$lines_printed += &print_node(\%pn_arg);
|
|
next COMPAT;
|
|
}
|
|
|
|
# ----- if compat previously seen, use cached info
|
|
|
|
if (exists($compat_driver{$compat})) {
|
|
for my $driver (@{ $compat_driver{$compat} }) {
|
|
$pn_arg{driver} = $driver;
|
|
$pn_arg{driver_cnt} = $driver_count{$compat};
|
|
$pn_arg{config_cnt} = $#{ $driver_config{$driver}} + 1;
|
|
|
|
for my $config (@{ $driver_config{$driver} }) {
|
|
$pn_arg{config} = $config;
|
|
$lines_printed += &print_node(\%pn_arg);
|
|
}
|
|
|
|
if (!@{ $driver_config{$driver} }) {
|
|
# no config cached yet
|
|
# $driver in %driver_hard_code_list
|
|
# but not %driver_config_hard_code_list
|
|
$lines_printed += &find_kconfig(\%pn_arg, $driver);
|
|
}
|
|
}
|
|
next COMPAT;
|
|
}
|
|
|
|
|
|
# ----- Find drivers (source files that contain compatible)
|
|
|
|
# this will miss arch/sparc/include/asm/parport.h
|
|
# It is better to move the compatible out of the .h
|
|
# than to add *.h. to the files list, because *.h generates
|
|
# a lot of false negatives.
|
|
my $files = '"*.c"';
|
|
my $drivers = `git grep -l '"$compat"' -- $files`;
|
|
chomp($drivers);
|
|
if ($drivers eq "") {
|
|
$pn_arg{driver} = "no_driver";
|
|
$pn_arg{config_cnt} = 1;
|
|
$pn_arg{config} = "no_config";
|
|
push @{ $compat_driver{$compat} }, "no_driver";
|
|
$lines_printed += &print_node(\%pn_arg);
|
|
next COMPAT;
|
|
}
|
|
|
|
my @drivers = split("\n", $drivers);
|
|
$driver_count{$compat} = $#drivers + 1;
|
|
$pn_arg{driver_cnt} = $#drivers + 1;
|
|
|
|
DRIVER:
|
|
for my $driver (@drivers) {
|
|
push @{ $compat_driver{$compat} }, $driver;
|
|
$pn_arg{driver} = $driver;
|
|
|
|
# ----- if driver previously seen, use cached info
|
|
|
|
$pn_arg{config_cnt} = $#{ $driver_config{$driver} } + 1;
|
|
for my $config (@{ $driver_config{$driver} }) {
|
|
$pn_arg{config} = $config;
|
|
$lines_printed += &print_node(\%pn_arg);
|
|
}
|
|
if (@{ $driver_config{$driver} }) {
|
|
next DRIVER;
|
|
}
|
|
|
|
if ($black_list_driver) {
|
|
for $black (@black_list_driver) {
|
|
next DRIVER if ($driver =~ /^$black$/);
|
|
}
|
|
}
|
|
|
|
|
|
# ----- Find Kconfig symbols that enable driver
|
|
|
|
$lines_printed += &find_kconfig(\%pn_arg, $driver);
|
|
|
|
}
|
|
}
|
|
|
|
# White space (line) between nodes for readability.
|
|
# Each node may report several compatibles.
|
|
# For each compatible, multiple drivers may be reported.
|
|
# For each driver, multiple CONFIG_ options may be reported.
|
|
if ($lines_printed) {
|
|
print "\n";
|
|
}
|
|
}
|
|
|
|
sub read_dts()
|
|
{
|
|
my $file = shift;
|
|
|
|
my $compatible = "";
|
|
my $line;
|
|
my $node = "";
|
|
my $node_enabled = "";
|
|
|
|
if (! -r $file) {
|
|
print STDERR "file '$file' is not readable or does not exist\n";
|
|
exit 3;
|
|
}
|
|
|
|
if (!open(DT_FILE, "-|", "$dtx_diff $file")) {
|
|
print STDERR "\n";
|
|
print STDERR "shell command failed:\n";
|
|
print STDERR " $dtx_diff $file\n";
|
|
print STDERR "\n";
|
|
exit 3;
|
|
}
|
|
|
|
FILE:
|
|
while ($line = <DT_FILE>) {
|
|
chomp($line);
|
|
|
|
if ($line =~ /{/) {
|
|
|
|
&handle_compatible($full_node, $node, $compatible,
|
|
$node_enabled);
|
|
|
|
while ($end_node_count-- > 0) {
|
|
pop @full_node;
|
|
};
|
|
$end_node_count = 0;
|
|
$full_node = @full_node[-1];
|
|
|
|
$node = $line;
|
|
$node =~ s/^\s*(.*)\s+\{.*/$1/;
|
|
$node =~ s/.*: //;
|
|
if ($node eq '/' ) {
|
|
$full_node = '/';
|
|
} elsif ($full_node ne '/') {
|
|
$full_node = $full_node . '/' . $node;
|
|
} else {
|
|
$full_node = '/' . $node;
|
|
}
|
|
push @full_node, $full_node;
|
|
|
|
$compatible = "";
|
|
$node_enabled = "";
|
|
next FILE;
|
|
}
|
|
|
|
if ($line =~ /}/) {
|
|
$end_node_count++;
|
|
}
|
|
|
|
if ($line =~ /(\s+|^)status =/) {
|
|
$node_enabled = $line;
|
|
$node_enabled =~ s/^\t*//;
|
|
$node_enabled =~ s/^status = "//;
|
|
$node_enabled =~ s/";$//;
|
|
next FILE;
|
|
}
|
|
|
|
if ($line =~ /(\s+|^)compatible =/) {
|
|
# Extract all compatible entries for this device
|
|
# White space matching here and in handle_compatible() is
|
|
# precise, because input format is the output of dtc,
|
|
# which is invoked by dtx_diff.
|
|
$compatible = $line;
|
|
$compatible =~ s/^\t*//;
|
|
$compatible =~ s/^compatible = //;
|
|
$compatible =~ s/;$//;
|
|
}
|
|
}
|
|
|
|
&handle_compatible($full_node, $node, $compatible, $node_enabled);
|
|
|
|
close(DT_FILE);
|
|
}
|
|
|
|
|
|
sub read_config_file()
|
|
{
|
|
if (! -r $config_file) {
|
|
print STDERR "file '$config_file' is not readable or does not exist\n";
|
|
exit 2;
|
|
}
|
|
|
|
if (!open(CONFIG_FILE, "<", "$config_file")) {
|
|
print STDERR "open $config_file failed\n";
|
|
exit 2;
|
|
}
|
|
|
|
my @line;
|
|
|
|
LINE:
|
|
while ($line = <CONFIG_FILE>) {
|
|
chomp($line);
|
|
next LINE if ($line =~ /^\s*#/);
|
|
next LINE if ($line =~ /^\s*$/);
|
|
@line = split /=/, $line;
|
|
$existing_config{@line[0]} = @line[1];
|
|
}
|
|
|
|
close(CONFIG_FILE);
|
|
}
|
|
|
|
|
|
sub cmd_line_err()
|
|
{
|
|
my $msg = shift;
|
|
|
|
print STDERR "\n";
|
|
print STDERR " ERROR processing command line options\n";
|
|
print STDERR " $msg\n" if ($msg ne "");
|
|
print STDERR "\n";
|
|
print STDERR " For help, type '$script_name --help'\n";
|
|
print STDERR "\n";
|
|
}
|
|
|
|
|
|
# -----------------------------------------------------------------------------
|
|
# program entry point
|
|
|
|
Getopt::Long::Configure("no_ignore_case", "bundling");
|
|
|
|
if (!GetOptions(
|
|
"c=s" => \$config_file,
|
|
"config=s" => \$config_file,
|
|
"config-format" => \$config_format,
|
|
"exclude-flag=s" => \@exclude_flag,
|
|
"h" => \$help,
|
|
"help" => \$help,
|
|
"black-list-driver" => \$black_list_driver,
|
|
"white-list-config" => \$white_list_config,
|
|
"white-list-driver" => \$white_list_driver,
|
|
"include-flag=s" => \@include_flag,
|
|
"include-suspect" => \$include_suspect,
|
|
"short-name" => \$short_name,
|
|
"show-lists" => \$show_lists,
|
|
"version" => \$version,
|
|
)) {
|
|
|
|
&cmd_line_err();
|
|
|
|
exit 1;
|
|
}
|
|
|
|
|
|
my $exit_after_messages = 0;
|
|
|
|
if ($version) {
|
|
print STDERR "\n$script_name $VUFX\n\n";
|
|
$exit_after_messages = 1;
|
|
}
|
|
|
|
|
|
if ($help) {
|
|
&usage;
|
|
$exit_after_messages = 1;
|
|
}
|
|
|
|
|
|
if ($show_lists) {
|
|
|
|
print "\n";
|
|
print "These compatibles are hard coded to have no driver.\n";
|
|
print "\n";
|
|
for my $compat (sort keys %compat_white_list) {
|
|
print " $compat\n";
|
|
}
|
|
|
|
|
|
print "\n\n";
|
|
print "The driver for these compatibles is hard coded (white list).\n";
|
|
print "\n";
|
|
my $max_compat_len = 0;
|
|
for my $compat (sort keys %driver_hard_code_list) {
|
|
if (length $compat > $max_compat_len) {
|
|
$max_compat_len = length $compat;
|
|
}
|
|
}
|
|
for my $compat (sort keys %driver_hard_code_list) {
|
|
if (($driver ne "hardcoded_no_driver") && ($driver ne "no_driver")) {
|
|
my $first = 1;
|
|
for my $driver (@{ $driver_hard_code_list{$compat} }) {
|
|
if ($first) {
|
|
print " $compat";
|
|
print " " x ($max_compat_len - length $compat);
|
|
$first = 0;
|
|
} else {
|
|
print " ", " " x $max_compat_len;
|
|
}
|
|
print " $driver\n";
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
print "\n\n";
|
|
print "The configuration option for these drivers is hard coded (white list).\n";
|
|
print "\n";
|
|
my $max_driver_len = 0;
|
|
for my $driver (sort keys %driver_config_hard_code_list) {
|
|
if (length $driver > $max_driver_len) {
|
|
$max_driver_len = length $driver;
|
|
}
|
|
}
|
|
for my $driver (sort keys %driver_config_hard_code_list) {
|
|
if (($driver ne "hardcoded_no_driver") && ($driver ne "no_driver")) {
|
|
my $first = 1;
|
|
for my $config (@{ $driver_config_hard_code_list{$driver} }) {
|
|
if ($first) {
|
|
print " $driver";
|
|
print " " x ($max_driver_len - length $driver);
|
|
$first = 0;
|
|
} else {
|
|
print " ", " " x $max_driver_len;
|
|
}
|
|
print " $config\n";
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
print "\n\n";
|
|
print "These drivers are black listed.\n";
|
|
print "\n";
|
|
for my $driver (@black_list_driver) {
|
|
print " $driver\n";
|
|
}
|
|
|
|
print "\n";
|
|
|
|
$exit_after_messages = 1;
|
|
}
|
|
|
|
|
|
if ($exit_after_messages) {
|
|
exit 0;
|
|
}
|
|
|
|
|
|
$exclude_flag_pattern = "[";
|
|
for my $exclude_flag (@exclude_flag) {
|
|
$exclude_flag_pattern = $exclude_flag_pattern . $exclude_flag;
|
|
}
|
|
$exclude_flag_pattern = $exclude_flag_pattern . "]";
|
|
# clean up if empty
|
|
$exclude_flag_pattern =~ s/^\[\]$//;
|
|
|
|
|
|
$include_flag_pattern = "[";
|
|
for my $include_flag (@include_flag) {
|
|
$include_flag_pattern = $include_flag_pattern . $include_flag;
|
|
}
|
|
$include_flag_pattern = $include_flag_pattern . "]";
|
|
# clean up if empty
|
|
$include_flag_pattern =~ s/^\[\]$//;
|
|
|
|
|
|
if ($exclude_flag_pattern) {
|
|
my $found = 0;
|
|
for $pr_flag_value (@pr_flag_value) {
|
|
if ($exclude_flag_pattern =~ m/$pr_flag_value/) {
|
|
$found = 1;
|
|
}
|
|
}
|
|
if (!$found) {
|
|
&cmd_line_err("invalid value for FLAG in --exclude-flag\n");
|
|
exit 1
|
|
}
|
|
}
|
|
|
|
if ($include_flag_pattern) {
|
|
my $found = 0;
|
|
for $pr_flag_value (@pr_flag_value) {
|
|
if ($include_flag_pattern =~ m/$pr_flag_value/) {
|
|
$found = 1;
|
|
}
|
|
}
|
|
if (!$found) {
|
|
&cmd_line_err("invalid value for FLAG in --include-flag\n");
|
|
exit 1
|
|
}
|
|
}
|
|
|
|
if ($include_suspect) {
|
|
$include_flag_pattern =~ s/\[//;
|
|
$include_flag_pattern =~ s/\]//;
|
|
$include_flag_pattern = "[" . $include_flag_pattern . "A-Z]";
|
|
}
|
|
|
|
if ($exclude_flag_pattern =~ m/$include_flag_pattern/) {
|
|
&cmd_line_err("the same flag appears in both --exclude-flag and --include-flag or --include-suspect\n");
|
|
exit 1
|
|
}
|
|
|
|
|
|
# ($#ARGV < 0) is valid for --help, --version
|
|
if ($#ARGV < 0) {
|
|
&cmd_line_err("device-tree... is required");
|
|
exit 1
|
|
}
|
|
|
|
|
|
if ($config_file) {
|
|
&read_config_file();
|
|
}
|
|
|
|
|
|
# avoid pushing duplicates for this value
|
|
$driver = "hardcoded_no_driver";
|
|
for $config ( @{ $driver_config_hard_code_list{$driver} } ) {
|
|
push @{ $driver_config{$driver} }, $config;
|
|
}
|
|
|
|
if ($white_list_driver) {
|
|
for my $compat (keys %driver_hard_code_list) {
|
|
for my $driver (@{ $driver_hard_code_list{$compat} }) {
|
|
push @{ $compat_driver{$compat} }, $driver;
|
|
if ($driver ne "hardcoded_no_driver") {
|
|
$driver_count{$compat} = scalar @{ $compat_driver{$compat} };
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if ($white_list_config) {
|
|
for my $driver (keys %driver_config_hard_code_list) {
|
|
if ($driver ne "hardcoded_no_driver") {
|
|
for $config ( @{ $driver_config_hard_code_list{$driver} } ) {
|
|
push @{ $driver_config{$driver} }, $config;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (-x "scripts/dtc/dtx_diff") {
|
|
$dtx_diff = "scripts/dtc/dtx_diff";
|
|
} else {
|
|
|
|
print STDERR "\n";
|
|
print STDERR "$script_name must be run from the root directory of a Linux kernel tree\n";
|
|
print STDERR "\n";
|
|
exit 3;
|
|
}
|
|
|
|
for $file (@ARGV) {
|
|
&read_dts($file);
|
|
}
|