56f1ba28 |
1 | /* |
2 | * MPC85xx PM operators |
3 | * |
4 | * Copyright 2015 Freescale Semiconductor Inc. |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify it |
7 | * under the terms of the GNU General Public License as published by the |
8 | * Free Software Foundation; either version 2 of the License, or (at your |
9 | * option) any later version. |
10 | */ |
11 | |
12 | #define pr_fmt(fmt) "%s: " fmt, __func__ |
13 | |
14 | #include <linux/kernel.h> |
15 | #include <linux/of.h> |
16 | #include <linux/of_address.h> |
17 | #include <linux/fsl/guts.h> |
18 | |
19 | #include <asm/io.h> |
20 | #include <asm/fsl_pm.h> |
21 | |
22 | static struct ccsr_guts __iomem *guts; |
23 | |
24 | static void mpc85xx_irq_mask(int cpu) |
25 | { |
26 | |
27 | } |
28 | |
29 | static void mpc85xx_irq_unmask(int cpu) |
30 | { |
31 | |
32 | } |
33 | |
34 | static void mpc85xx_cpu_die(int cpu) |
35 | { |
36 | u32 tmp; |
37 | |
38 | tmp = (mfspr(SPRN_HID0) & ~(HID0_DOZE|HID0_SLEEP)) | HID0_NAP; |
39 | mtspr(SPRN_HID0, tmp); |
40 | |
41 | /* Enter NAP mode. */ |
42 | tmp = mfmsr(); |
43 | tmp |= MSR_WE; |
44 | asm volatile( |
45 | "msync\n" |
46 | "mtmsr %0\n" |
47 | "isync\n" |
48 | : |
49 | : "r" (tmp)); |
50 | } |
51 | |
52 | static void mpc85xx_cpu_up_prepare(int cpu) |
53 | { |
54 | |
55 | } |
56 | |
57 | static void mpc85xx_freeze_time_base(bool freeze) |
58 | { |
59 | uint32_t mask; |
60 | |
61 | mask = CCSR_GUTS_DEVDISR_TB0 | CCSR_GUTS_DEVDISR_TB1; |
62 | if (freeze) |
63 | setbits32(&guts->devdisr, mask); |
64 | else |
65 | clrbits32(&guts->devdisr, mask); |
66 | |
67 | in_be32(&guts->devdisr); |
68 | } |
69 | |
70 | static const struct of_device_id mpc85xx_smp_guts_ids[] = { |
71 | { .compatible = "fsl,mpc8572-guts", }, |
72 | { .compatible = "fsl,p1020-guts", }, |
73 | { .compatible = "fsl,p1021-guts", }, |
74 | { .compatible = "fsl,p1022-guts", }, |
75 | { .compatible = "fsl,p1023-guts", }, |
76 | { .compatible = "fsl,p2020-guts", }, |
77 | { .compatible = "fsl,bsc9132-guts", }, |
78 | {}, |
79 | }; |
80 | |
81 | static const struct fsl_pm_ops mpc85xx_pm_ops = { |
82 | .freeze_time_base = mpc85xx_freeze_time_base, |
83 | .irq_mask = mpc85xx_irq_mask, |
84 | .irq_unmask = mpc85xx_irq_unmask, |
85 | .cpu_die = mpc85xx_cpu_die, |
86 | .cpu_up_prepare = mpc85xx_cpu_up_prepare, |
87 | }; |
88 | |
89 | int __init mpc85xx_setup_pmc(void) |
90 | { |
91 | struct device_node *np; |
92 | |
93 | np = of_find_matching_node(NULL, mpc85xx_smp_guts_ids); |
94 | if (np) { |
95 | guts = of_iomap(np, 0); |
96 | of_node_put(np); |
97 | if (!guts) { |
98 | pr_err("Could not map guts node address\n"); |
99 | return -ENOMEM; |
100 | } |
101 | } |
102 | |
103 | qoriq_pm_ops = &mpc85xx_pm_ops; |
104 | |
105 | return 0; |
106 | } |