1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * OMAP3/OMAP4 Voltage Management Routines
4  *
5  * Author: Thara Gopinath	<thara@ti.com>
6  *
7  * Copyright (C) 2007 Texas Instruments, Inc.
8  * Rajendra Nayak <rnayak@ti.com>
9  * Lesly A M <x0080970@ti.com>
10  *
11  * Copyright (C) 2008 Nokia Corporation
12  * Kalle Jokiniemi
13  *
14  * Copyright (C) 2010 Texas Instruments, Inc.
15  * Thara Gopinath <thara@ti.com>
16  */
17 #include <linux/kernel.h>
18 #include <linux/err.h>
19 #include <linux/init.h>
20 
21 #include "common.h"
22 #include "soc.h"
23 #include "prm-regbits-44xx.h"
24 #include "prm44xx.h"
25 #include "prcm44xx.h"
26 #include "prminst44xx.h"
27 #include "voltage.h"
28 #include "omap_opp_data.h"
29 #include "vc.h"
30 #include "vp.h"
31 
32 static const struct omap_vfsm_instance omap4_vdd_mpu_vfsm = {
33 	.voltsetup_reg = OMAP4_PRM_VOLTSETUP_MPU_RET_SLEEP_OFFSET,
34 	.voltsetup_off_reg = OMAP4_PRM_VOLTSETUP_MPU_OFF_OFFSET,
35 };
36 
37 static const struct omap_vfsm_instance omap4_vdd_iva_vfsm = {
38 	.voltsetup_reg = OMAP4_PRM_VOLTSETUP_IVA_RET_SLEEP_OFFSET,
39 	.voltsetup_off_reg = OMAP4_PRM_VOLTSETUP_IVA_OFF_OFFSET,
40 };
41 
42 static const struct omap_vfsm_instance omap4_vdd_core_vfsm = {
43 	.voltsetup_reg = OMAP4_PRM_VOLTSETUP_CORE_RET_SLEEP_OFFSET,
44 	.voltsetup_off_reg = OMAP4_PRM_VOLTSETUP_CORE_OFF_OFFSET,
45 };
46 
47 static struct voltagedomain omap4_voltdm_mpu = {
48 	.name = "mpu",
49 	.scalable = true,
50 	.read = omap4_prm_vcvp_read,
51 	.write = omap4_prm_vcvp_write,
52 	.rmw = omap4_prm_vcvp_rmw,
53 	.vc = &omap4_vc_mpu,
54 	.vfsm = &omap4_vdd_mpu_vfsm,
55 	.vp = &omap4_vp_mpu,
56 };
57 
58 static struct voltagedomain omap4_voltdm_iva = {
59 	.name = "iva",
60 	.scalable = true,
61 	.read = omap4_prm_vcvp_read,
62 	.write = omap4_prm_vcvp_write,
63 	.rmw = omap4_prm_vcvp_rmw,
64 	.vc = &omap4_vc_iva,
65 	.vfsm = &omap4_vdd_iva_vfsm,
66 	.vp = &omap4_vp_iva,
67 };
68 
69 static struct voltagedomain omap4_voltdm_core = {
70 	.name = "core",
71 	.scalable = true,
72 	.read = omap4_prm_vcvp_read,
73 	.write = omap4_prm_vcvp_write,
74 	.rmw = omap4_prm_vcvp_rmw,
75 	.vc = &omap4_vc_core,
76 	.vfsm = &omap4_vdd_core_vfsm,
77 	.vp = &omap4_vp_core,
78 };
79 
80 static struct voltagedomain omap4_voltdm_wkup = {
81 	.name = "wakeup",
82 };
83 
84 static struct voltagedomain *voltagedomains_omap4[] __initdata = {
85 	&omap4_voltdm_mpu,
86 	&omap4_voltdm_iva,
87 	&omap4_voltdm_core,
88 	&omap4_voltdm_wkup,
89 	NULL,
90 };
91 
92 static const char *const sys_clk_name __initconst = "sys_clkin_ck";
93 
omap44xx_voltagedomains_init(void)94 void __init omap44xx_voltagedomains_init(void)
95 {
96 	struct voltagedomain *voltdm;
97 	int i;
98 
99 	/*
100 	 * XXX Will depend on the process, validation, and binning
101 	 * for the currently-running IC
102 	 */
103 #ifdef CONFIG_PM_OPP
104 	if (cpu_is_omap443x()) {
105 		omap4_voltdm_mpu.volt_data = omap443x_vdd_mpu_volt_data;
106 		omap4_voltdm_iva.volt_data = omap443x_vdd_iva_volt_data;
107 		omap4_voltdm_core.volt_data = omap443x_vdd_core_volt_data;
108 	} else if (cpu_is_omap446x()) {
109 		omap4_voltdm_mpu.volt_data = omap446x_vdd_mpu_volt_data;
110 		omap4_voltdm_iva.volt_data = omap446x_vdd_iva_volt_data;
111 		omap4_voltdm_core.volt_data = omap446x_vdd_core_volt_data;
112 	}
113 #endif
114 
115 	omap4_voltdm_mpu.vp_param = &omap4_mpu_vp_data;
116 	omap4_voltdm_iva.vp_param = &omap4_iva_vp_data;
117 	omap4_voltdm_core.vp_param = &omap4_core_vp_data;
118 
119 	omap4_voltdm_mpu.vc_param = &omap4_mpu_vc_data;
120 	omap4_voltdm_iva.vc_param = &omap4_iva_vc_data;
121 	omap4_voltdm_core.vc_param = &omap4_core_vc_data;
122 
123 	for (i = 0; voltdm = voltagedomains_omap4[i], voltdm; i++)
124 		voltdm->sys_clk.name = sys_clk_name;
125 
126 	voltdm_init(voltagedomains_omap4);
127 };
128