1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * OMAP and TWL PMIC specific initializations.
4 *
5 * Copyright (C) 2010 Texas Instruments Incorporated.
6 * Thara Gopinath
7 * Copyright (C) 2009 Texas Instruments Incorporated.
8 * Nishanth Menon
9 * Copyright (C) 2009 Nokia Corporation
10 * Paul Walmsley
11 */
12
13 #include <linux/err.h>
14 #include <linux/io.h>
15 #include <linux/kernel.h>
16 #include <linux/mfd/twl.h>
17
18 #include "soc.h"
19 #include "voltage.h"
20
21 #include "pm.h"
22
23 #define OMAP3_SRI2C_SLAVE_ADDR 0x12
24 #define OMAP3_VDD_MPU_SR_CONTROL_REG 0x00
25 #define OMAP3_VDD_CORE_SR_CONTROL_REG 0x01
26 #define OMAP3_VP_CONFIG_ERROROFFSET 0x00
27 #define OMAP3_VP_VSTEPMIN_VSTEPMIN 0x1
28 #define OMAP3_VP_VSTEPMAX_VSTEPMAX 0x04
29 #define OMAP3_VP_VLIMITTO_TIMEOUT_US 200
30
31 #define OMAP4_SRI2C_SLAVE_ADDR 0x12
32 #define OMAP4_VDD_MPU_SR_VOLT_REG 0x55
33 #define OMAP4_VDD_MPU_SR_CMD_REG 0x56
34 #define OMAP4_VDD_IVA_SR_VOLT_REG 0x5B
35 #define OMAP4_VDD_IVA_SR_CMD_REG 0x5C
36 #define OMAP4_VDD_CORE_SR_VOLT_REG 0x61
37 #define OMAP4_VDD_CORE_SR_CMD_REG 0x62
38
39 static bool is_offset_valid;
40 static u8 smps_offset;
41
42 #define REG_SMPS_OFFSET 0xE0
43
44 static unsigned long twl4030_vsel_to_uv(const u8 vsel)
45 {
46 return (((vsel * 125) + 6000)) * 100;
47 }
48
49 static u8 twl4030_uv_to_vsel(unsigned long uv)
50 {
51 return DIV_ROUND_UP(uv - 600000, 12500);
52 }
53
54 static unsigned long twl6030_vsel_to_uv(const u8 vsel)
55 {
56 /*
57 * In TWL6030 depending on the value of SMPS_OFFSET
58 * efuse register the voltage range supported in
59 * standard mode can be either between 0.6V - 1.3V or
60 * 0.7V - 1.4V. In TWL6030 ES1.0 SMPS_OFFSET efuse
61 * is programmed to all 0's where as starting from
62 * TWL6030 ES1.1 the efuse is programmed to 1
63 */
64 if (!is_offset_valid) {
65 twl_i2c_read_u8(TWL6030_MODULE_ID0, &smps_offset,
66 REG_SMPS_OFFSET);
67 is_offset_valid = true;
68 }
69
70 if (!vsel)
71 return 0;
72 /*
73 * There is no specific formula for voltage to vsel
74 * conversion above 1.3V. There are special hardcoded
75 * values for voltages above 1.3V. Currently we are
76 * hardcoding only for 1.35 V which is used for 1GH OPP for
77 * OMAP4430.
78 */
79 if (vsel == 0x3A)
80 return 1350000;
81
82 if (smps_offset & 0x8)
83 return ((((vsel - 1) * 1266) + 70900)) * 10;
84 else
85 return ((((vsel - 1) * 1266) + 60770)) * 10;
86 }
87
88 static u8 twl6030_uv_to_vsel(unsigned long uv)
89 {
90 /*
91 * In TWL6030 depending on the value of SMPS_OFFSET
92 * efuse register the voltage range supported in
93 * standard mode can be either between 0.6V - 1.3V or
94 * 0.7V - 1.4V. In TWL6030 ES1.0 SMPS_OFFSET efuse
95 * is programmed to all 0's where as starting from
96 * TWL6030 ES1.1 the efuse is programmed to 1
97 */
98 if (!is_offset_valid) {
99 twl_i2c_read_u8(TWL6030_MODULE_ID0, &smps_offset,
100 REG_SMPS_OFFSET);
101 is_offset_valid = true;
102 }
103
104 if (!uv)
105 return 0x00;
106 /*
107 * There is no specific formula for voltage to vsel
108 * conversion above 1.3V. There are special hardcoded
109 * values for voltages above 1.3V. Currently we are
110 * hardcoding only for 1.35 V which is used for 1GH OPP for
111 * OMAP4430.
112 */
113 if (uv > twl6030_vsel_to_uv(0x39)) {
114 if (uv == 1350000)
115 return 0x3A;
116 pr_err("%s:OUT OF RANGE! non mapped vsel for %ld Vs max %ld\n",
117 __func__, uv, twl6030_vsel_to_uv(0x39));
118 return 0x3A;
119 }
120
121 if (smps_offset & 0x8)
122 return DIV_ROUND_UP(uv - 709000, 12660) + 1;
123 else
124 return DIV_ROUND_UP(uv - 607700, 12660) + 1;
125 }
126
127 static struct omap_voltdm_pmic omap3_mpu_pmic = {
128 .slew_rate = 4000,
129 .step_size = 12500,
130 .vp_erroroffset = OMAP3_VP_CONFIG_ERROROFFSET,
131 .vp_vstepmin = OMAP3_VP_VSTEPMIN_VSTEPMIN,
132 .vp_vstepmax = OMAP3_VP_VSTEPMAX_VSTEPMAX,
133 .vddmin = 600000,
134 .vddmax = 1450000,
135 .vp_timeout_us = OMAP3_VP_VLIMITTO_TIMEOUT_US,
136 .i2c_slave_addr = OMAP3_SRI2C_SLAVE_ADDR,
137 .volt_reg_addr = OMAP3_VDD_MPU_SR_CONTROL_REG,
138 .i2c_high_speed = true,
139 .vsel_to_uv = twl4030_vsel_to_uv,
140 .uv_to_vsel = twl4030_uv_to_vsel,
141 };
142
143 static struct omap_voltdm_pmic omap3_core_pmic = {
144 .slew_rate = 4000,
145 .step_size = 12500,
146 .vp_erroroffset = OMAP3_VP_CONFIG_ERROROFFSET,
147 .vp_vstepmin = OMAP3_VP_VSTEPMIN_VSTEPMIN,
148 .vp_vstepmax = OMAP3_VP_VSTEPMAX_VSTEPMAX,
149 .vddmin = 600000,
150 .vddmax = 1450000,
151 .vp_timeout_us = OMAP3_VP_VLIMITTO_TIMEOUT_US,
152 .i2c_slave_addr = OMAP3_SRI2C_SLAVE_ADDR,
153 .volt_reg_addr = OMAP3_VDD_CORE_SR_CONTROL_REG,
154 .i2c_high_speed = true,
155 .vsel_to_uv = twl4030_vsel_to_uv,
156 .uv_to_vsel = twl4030_uv_to_vsel,
157 };
158
159 static struct omap_voltdm_pmic omap4_mpu_pmic = {
160 .slew_rate = 4000,
161 .step_size = 12660,
162 .vp_erroroffset = OMAP4_VP_CONFIG_ERROROFFSET,
163 .vp_vstepmin = OMAP4_VP_VSTEPMIN_VSTEPMIN,
164 .vp_vstepmax = OMAP4_VP_VSTEPMAX_VSTEPMAX,
165 .vddmin = 0,
166 .vddmax = 2100000,
167 .vp_timeout_us = OMAP4_VP_VLIMITTO_TIMEOUT_US,
168 .i2c_slave_addr = OMAP4_SRI2C_SLAVE_ADDR,
169 .volt_reg_addr = OMAP4_VDD_MPU_SR_VOLT_REG,
170 .cmd_reg_addr = OMAP4_VDD_MPU_SR_CMD_REG,
171 .i2c_high_speed = true,
172 .i2c_pad_load = 3,
173 .vsel_to_uv = twl6030_vsel_to_uv,
174 .uv_to_vsel = twl6030_uv_to_vsel,
175 };
176
177 static struct omap_voltdm_pmic omap4_iva_pmic = {
178 .slew_rate = 4000,
179 .step_size = 12660,
180 .vp_erroroffset = OMAP4_VP_CONFIG_ERROROFFSET,
181 .vp_vstepmin = OMAP4_VP_VSTEPMIN_VSTEPMIN,
182 .vp_vstepmax = OMAP4_VP_VSTEPMAX_VSTEPMAX,
183 .vddmin = 0,
184 .vddmax = 2100000,
185 .vp_timeout_us = OMAP4_VP_VLIMITTO_TIMEOUT_US,
186 .i2c_slave_addr = OMAP4_SRI2C_SLAVE_ADDR,
187 .volt_reg_addr = OMAP4_VDD_IVA_SR_VOLT_REG,
188 .cmd_reg_addr = OMAP4_VDD_IVA_SR_CMD_REG,
189 .i2c_high_speed = true,
190 .i2c_pad_load = 3,
191 .vsel_to_uv = twl6030_vsel_to_uv,
192 .uv_to_vsel = twl6030_uv_to_vsel,
193 };
194
195 static struct omap_voltdm_pmic omap4_core_pmic = {
196 .slew_rate = 4000,
197 .step_size = 12660,
198 .vp_erroroffset = OMAP4_VP_CONFIG_ERROROFFSET,
199 .vp_vstepmin = OMAP4_VP_VSTEPMIN_VSTEPMIN,
200 .vp_vstepmax = OMAP4_VP_VSTEPMAX_VSTEPMAX,
201 .vddmin = 0,
202 .vddmax = 2100000,
203 .vp_timeout_us = OMAP4_VP_VLIMITTO_TIMEOUT_US,
204 .i2c_slave_addr = OMAP4_SRI2C_SLAVE_ADDR,
205 .volt_reg_addr = OMAP4_VDD_CORE_SR_VOLT_REG,
206 .cmd_reg_addr = OMAP4_VDD_CORE_SR_CMD_REG,
207 .i2c_high_speed = true,
208 .i2c_pad_load = 3,
209 .vsel_to_uv = twl6030_vsel_to_uv,
210 .uv_to_vsel = twl6030_uv_to_vsel,
211 };
212
213 int __init omap4_twl_init(void)
214 {
215 struct voltagedomain *voltdm;
216
217 if (!cpu_is_omap44xx() ||
218 of_find_compatible_node(NULL, NULL, "motorola,cpcap"))
219 return -ENODEV;
220
221 voltdm = voltdm_lookup("mpu");
222 omap_voltage_register_pmic(voltdm, &omap4_mpu_pmic);
223
224 voltdm = voltdm_lookup("iva");
225 omap_voltage_register_pmic(voltdm, &omap4_iva_pmic);
226
227 voltdm = voltdm_lookup("core");
228 omap_voltage_register_pmic(voltdm, &omap4_core_pmic);
229
230 return 0;
231 }
232
233 int __init omap3_twl_init(void)
234 {
235 struct voltagedomain *voltdm;
236
237 if (!cpu_is_omap34xx())
238 return -ENODEV;
239
240 voltdm = voltdm_lookup("mpu_iva");
241 omap_voltage_register_pmic(voltdm, &omap3_mpu_pmic);
242
243 voltdm = voltdm_lookup("core");
244 omap_voltage_register_pmic(voltdm, &omap3_core_pmic);
245
246 return 0;
247 }
248
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