lantiq: add v3.10 patches
[openwrt/svn-archive/archive.git] / target / linux / lantiq / patches-3.10 / 0011-MIPS-lantiq-add-reset-controller-api-support.patch
1 From ab066a50a4aa00a862f467579960e8d12693df18 Mon Sep 17 00:00:00 2001
2 From: John Crispin <blogic@openwrt.org>
3 Date: Tue, 3 Sep 2013 13:18:12 +0200
4 Subject: [PATCH 11/34] MIPS: lantiq: add reset-controller api support
5
6 Add a reset-controller binding for the reset registers found on the lantiq
7 SoC.
8
9 Signed-off-by: John Crispin <blogic@openwrt.org>
10 ---
11 arch/mips/lantiq/xway/reset.c | 61 +++++++++++++++++++++++++++++++++++++++++
12 1 file changed, 61 insertions(+)
13
14 diff --git a/arch/mips/lantiq/xway/reset.c b/arch/mips/lantiq/xway/reset.c
15 index 1fa0f17..a1e06b7 100644
16 --- a/arch/mips/lantiq/xway/reset.c
17 +++ b/arch/mips/lantiq/xway/reset.c
18 @@ -14,6 +14,7 @@
19 #include <linux/delay.h>
20 #include <linux/of_address.h>
21 #include <linux/of_platform.h>
22 +#include <linux/reset-controller.h>
23
24 #include <asm/reboot.h>
25
26 @@ -113,6 +114,66 @@ void ltq_reset_once(unsigned int module, ulong u)
27 ltq_rcu_w32(ltq_rcu_r32(RCU_RST_REQ) & ~module, RCU_RST_REQ);
28 }
29
30 +static int ltq_assert_device(struct reset_controller_dev *rcdev,
31 + unsigned long id)
32 +{
33 + u32 val;
34 +
35 + if (id < 8)
36 + return -1;
37 +
38 + val = ltq_rcu_r32(RCU_RST_REQ);
39 + val |= BIT(id);
40 + ltq_rcu_w32(val, RCU_RST_REQ);
41 +
42 + return 0;
43 +}
44 +
45 +static int ltq_deassert_device(struct reset_controller_dev *rcdev,
46 + unsigned long id)
47 +{
48 + u32 val;
49 +
50 + if (id < 8)
51 + return -1;
52 +
53 + val = ltq_rcu_r32(RCU_RST_REQ);
54 + val &= ~BIT(id);
55 + ltq_rcu_w32(val, RCU_RST_REQ);
56 +
57 + return 0;
58 +}
59 +
60 +static int ltq_reset_device(struct reset_controller_dev *rcdev,
61 + unsigned long id)
62 +{
63 + ltq_assert_device(rcdev, id);
64 + return ltq_deassert_device(rcdev, id);
65 +}
66 +
67 +static struct reset_control_ops reset_ops = {
68 + .reset = ltq_reset_device,
69 + .assert = ltq_assert_device,
70 + .deassert = ltq_deassert_device,
71 +};
72 +
73 +static struct reset_controller_dev reset_dev = {
74 + .ops = &reset_ops,
75 + .owner = THIS_MODULE,
76 + .nr_resets = 32,
77 + .of_reset_n_cells = 1,
78 +};
79 +
80 +void ltq_rst_init(void)
81 +{
82 + reset_dev.of_node = of_find_compatible_node(NULL, NULL,
83 + "lantiq,xway-reset");
84 + if (!reset_dev.of_node)
85 + pr_err("Failed to find reset controller node");
86 + else
87 + reset_controller_register(&reset_dev);
88 +}
89 +
90 static void ltq_machine_restart(char *command)
91 {
92 local_irq_disable();
93 --
94 1.7.10.4
95