summaryrefslogtreecommitdiff
blob: cfe698d2a1d675d70bc0a19327cb917619dcacbd (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
# Copyright 1999-2006 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: $

WANT_AUTOCONF=2.5
WANT_AUTOMAKE=1.9
inherit linux-info eutils autotools

DESCRIPTION="linux-phc is a kernel patch to change the voltage/frequency pairs of processors from userspace."
HOMEPAGE="https://www.dedigentoo.org/trac/linux-phc/"
SRC_URI="mirror://sourceforge/${PN}/${P}.tar.gz"

LICENSE="GPL-2"
SLOT="0"
KEYWORDS="~x86"
IUSE=""

which_patch() {
	if kernel_is ge 2 6 19
	then
		PATCH="kernel-patch/${P}-kernel-vanilla-2.6.19.patch"
	elif kernel_is ge 2 6 18
	then
		PATCH="kernel-patch/${P}-kernel-vanilla-2.6.18.patch"
	elif kernel_is ge 2 6 17
	then
		PATCH="kernel-patch/${P}-kernel-vanilla-2.6.17.patch"
	elif kernel_is ge 2 6 16
	then
		PATCH="kernel-patch/${P}-kernel-vanilla-2.6.16.patch"
	elif kernel_is ge 2 6 15
	then
		PATCH="kernel-patch/${P}-kernel-vanilla-2.6.15.patch"
	else
		die "No ${PN} patch for kernel version ${KV_FULL} - sorry not supported"
	fi
}

collision_check() {
	if has collision_protect ${FEATURES}; then
		ewarn "Collisions are expected as this patches kernel code. Disable"
		ewarn "FEATURES=collision-protect before use"
		die 'incompatible FEATURES=collision-protect'
	fi
}

pkg_setup() {
	linux-info_pkg_setup
	collision_check
}

src_unpack() {
	which_patch

	if egrep -q 'linux-phc' \
		${KV_DIR}/arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c
	then
		ewarn "already installed ${PN} for kernel ${KV_FULL}"
		ewarn "If this is an upgrade attempt, reemerge your kernel sources"
		ewarn "and try emerging this package again."
		die
	fi

	unpack ${A}
	cd "${S}"

	local mydir="arch/i386/kernel/cpu/cpufreq"
	mkdir -p "${S}/${mydir}"

	cp -P "${KV_DIR}/${mydir}/Kconfig" "${S}/${mydir}/"
	cp -P "${KV_DIR}/${mydir}/speedstep-centrino.c" "${S}/${mydir}/"

	epatch "${S}/${PATCH}" || die "epatch failed"
}

src_compile() {
	einfo 'Compiling measurefreq'
	cd "${S}/utils/measurefreq"
	eautoconf
	eautomake
	econf || die 'econf failed'
	emake || die 'emake failed'
}

src_install() {
	insinto "$(/bin/readlink -f ${KV_DIR})"
	doins -r arch/*
	dodoc README
	doinitd gentoo/etc/init.d/undervolt
	doconfd gentoo/etc/conf.d/undervolt
	cd "${S}/utils/measurefreq"
	emake DESTDIR="${D}" install || die "emake failed"
}

pkg_preinst() {
	collision_check
}

pkg_postinst() {
	elog  "Please read https://www.dedigentoo.org/trac/linux-phc/#Documentation before using linux-phc"
	elog  "You can use the utility measurefreq to find appropriate voltage values."
	ewarn "Edit /etc/conf.d/undervolt before using the initscript"
}

pkg_postrm() {
	ewarn "Unmerging this ebuild won't revert the patches in your kernel"
	ewarn "Reemerge your kernel if you want that."
}