1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * MPC85xx PM operators
4 *
5 * Copyright 2015 Freescale Semiconductor Inc.
6 */
7
8 #define pr_fmt(fmt) "%s: " fmt, __func__
9
10 #include <linux/kernel.h>
11 #include <linux/of.h>
12 #include <linux/of_address.h>
13 #include <linux/fsl/guts.h>
14
15 #include <asm/io.h>
16 #include <asm/fsl_pm.h>
17
18 static struct ccsr_guts __iomem *guts;
19
mpc85xx_irq_mask(int cpu)20 static void mpc85xx_irq_mask(int cpu)
21 {
22
23 }
24
mpc85xx_irq_unmask(int cpu)25 static void mpc85xx_irq_unmask(int cpu)
26 {
27
28 }
29
mpc85xx_cpu_die(int cpu)30 static void mpc85xx_cpu_die(int cpu)
31 {
32 u32 tmp;
33
34 tmp = (mfspr(SPRN_HID0) & ~(HID0_DOZE|HID0_SLEEP)) | HID0_NAP;
35 mtspr(SPRN_HID0, tmp);
36
37 /* Enter NAP mode. */
38 tmp = mfmsr();
39 tmp |= MSR_WE;
40 asm volatile(
41 "msync\n"
42 "mtmsr %0\n"
43 "isync\n"
44 :
45 : "r" (tmp));
46 }
47
mpc85xx_cpu_up_prepare(int cpu)48 static void mpc85xx_cpu_up_prepare(int cpu)
49 {
50
51 }
52
mpc85xx_freeze_time_base(bool freeze)53 static void mpc85xx_freeze_time_base(bool freeze)
54 {
55 uint32_t mask;
56
57 mask = CCSR_GUTS_DEVDISR_TB0 | CCSR_GUTS_DEVDISR_TB1;
58 if (freeze)
59 setbits32(&guts->devdisr, mask);
60 else
61 clrbits32(&guts->devdisr, mask);
62
63 in_be32(&guts->devdisr);
64 }
65
66 static const struct of_device_id mpc85xx_smp_guts_ids[] = {
67 { .compatible = "fsl,mpc8572-guts", },
68 { .compatible = "fsl,p1020-guts", },
69 { .compatible = "fsl,p1021-guts", },
70 { .compatible = "fsl,p1022-guts", },
71 { .compatible = "fsl,p1023-guts", },
72 { .compatible = "fsl,p2020-guts", },
73 { .compatible = "fsl,bsc9132-guts", },
74 {},
75 };
76
77 static const struct fsl_pm_ops mpc85xx_pm_ops = {
78 .freeze_time_base = mpc85xx_freeze_time_base,
79 .irq_mask = mpc85xx_irq_mask,
80 .irq_unmask = mpc85xx_irq_unmask,
81 .cpu_die = mpc85xx_cpu_die,
82 .cpu_up_prepare = mpc85xx_cpu_up_prepare,
83 };
84
mpc85xx_setup_pmc(void)85 int __init mpc85xx_setup_pmc(void)
86 {
87 struct device_node *np;
88
89 np = of_find_matching_node(NULL, mpc85xx_smp_guts_ids);
90 if (np) {
91 guts = of_iomap(np, 0);
92 of_node_put(np);
93 if (!guts) {
94 pr_err("Could not map guts node address\n");
95 return -ENOMEM;
96 }
97 }
98
99 qoriq_pm_ops = &mpc85xx_pm_ops;
100
101 return 0;
102 }
103
