Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 1 | /* |
| 2 | * OMAP3/OMAP4 Voltage Management Routines |
| 3 | * |
| 4 | * Author: Thara Gopinath <thara@ti.com> |
| 5 | * |
| 6 | * Copyright (C) 2007 Texas Instruments, Inc. |
| 7 | * Rajendra Nayak <rnayak@ti.com> |
| 8 | * Lesly A M <x0080970@ti.com> |
| 9 | * |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 10 | * Copyright (C) 2008, 2011 Nokia Corporation |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 11 | * Kalle Jokiniemi |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 12 | * Paul Walmsley |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 13 | * |
| 14 | * Copyright (C) 2010 Texas Instruments, Inc. |
| 15 | * Thara Gopinath <thara@ti.com> |
| 16 | * |
| 17 | * This program is free software; you can redistribute it and/or modify |
| 18 | * it under the terms of the GNU General Public License version 2 as |
| 19 | * published by the Free Software Foundation. |
| 20 | */ |
| 21 | |
| 22 | #include <linux/delay.h> |
| 23 | #include <linux/io.h> |
| 24 | #include <linux/clk.h> |
| 25 | #include <linux/err.h> |
| 26 | #include <linux/debugfs.h> |
| 27 | #include <linux/slab.h> |
| 28 | |
| 29 | #include <plat/common.h> |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 30 | |
| 31 | #include "prm-regbits-34xx.h" |
Thara Gopinath | bd38107 | 2010-12-10 23:15:23 +0530 | [diff] [blame] | 32 | #include "prm-regbits-44xx.h" |
| 33 | #include "prm44xx.h" |
| 34 | #include "prcm44xx.h" |
| 35 | #include "prminst44xx.h" |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 36 | #include "control.h" |
| 37 | |
Paul Walmsley | e1d6f47 | 2011-02-25 15:54:33 -0700 | [diff] [blame] | 38 | #include "voltage.h" |
| 39 | |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 40 | #include "vc.h" |
| 41 | #include "vp.h" |
| 42 | |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 43 | #define VOLTAGE_DIR_SIZE 16 |
| 44 | |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 45 | |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 46 | static struct omap_vdd_info **vdd_info; |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 47 | |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 48 | /* |
| 49 | * Number of scalable voltage domains. |
| 50 | */ |
| 51 | static int nr_scalable_vdd; |
| 52 | |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 53 | /* XXX document */ |
| 54 | static s16 prm_mod_offs; |
| 55 | static s16 prm_irqst_ocp_mod_offs; |
Thara Gopinath | bd38107 | 2010-12-10 23:15:23 +0530 | [diff] [blame] | 56 | |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 57 | static struct dentry *voltage_dir; |
| 58 | |
| 59 | /* Init function pointers */ |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 60 | static int vp_forceupdate_scale_voltage(struct omap_vdd_info *vdd, |
| 61 | unsigned long target_volt); |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 62 | |
| 63 | static u32 omap3_voltage_read_reg(u16 mod, u8 offset) |
| 64 | { |
| 65 | return omap2_prm_read_mod_reg(mod, offset); |
| 66 | } |
| 67 | |
| 68 | static void omap3_voltage_write_reg(u32 val, u16 mod, u8 offset) |
| 69 | { |
| 70 | omap2_prm_write_mod_reg(val, mod, offset); |
| 71 | } |
| 72 | |
Thara Gopinath | bd38107 | 2010-12-10 23:15:23 +0530 | [diff] [blame] | 73 | static u32 omap4_voltage_read_reg(u16 mod, u8 offset) |
| 74 | { |
| 75 | return omap4_prminst_read_inst_reg(OMAP4430_PRM_PARTITION, |
| 76 | mod, offset); |
| 77 | } |
| 78 | |
| 79 | static void omap4_voltage_write_reg(u32 val, u16 mod, u8 offset) |
| 80 | { |
| 81 | omap4_prminst_write_inst_reg(val, OMAP4430_PRM_PARTITION, mod, offset); |
| 82 | } |
| 83 | |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 84 | static int __init _config_common_vdd_data(struct omap_vdd_info *vdd) |
| 85 | { |
| 86 | char *sys_ck_name; |
| 87 | struct clk *sys_ck; |
| 88 | u32 sys_clk_speed, timeout_val, waittime; |
| 89 | |
| 90 | /* |
| 91 | * XXX Clockfw should handle this, or this should be in a |
| 92 | * struct record |
| 93 | */ |
| 94 | if (cpu_is_omap24xx() || cpu_is_omap34xx()) |
| 95 | sys_ck_name = "sys_ck"; |
| 96 | else if (cpu_is_omap44xx()) |
| 97 | sys_ck_name = "sys_clkin_ck"; |
| 98 | else |
| 99 | return -EINVAL; |
| 100 | |
| 101 | /* |
| 102 | * Sys clk rate is require to calculate vp timeout value and |
| 103 | * smpswaittimemin and smpswaittimemax. |
| 104 | */ |
| 105 | sys_ck = clk_get(NULL, sys_ck_name); |
| 106 | if (IS_ERR(sys_ck)) { |
| 107 | pr_warning("%s: Could not get the sys clk to calculate" |
| 108 | "various vdd_%s params\n", __func__, vdd->voltdm.name); |
| 109 | return -EINVAL; |
| 110 | } |
| 111 | sys_clk_speed = clk_get_rate(sys_ck); |
| 112 | clk_put(sys_ck); |
| 113 | /* Divide to avoid overflow */ |
| 114 | sys_clk_speed /= 1000; |
| 115 | |
| 116 | /* Generic voltage parameters */ |
| 117 | vdd->curr_volt = 1200000; |
| 118 | vdd->volt_scale = vp_forceupdate_scale_voltage; |
| 119 | vdd->vp_enabled = false; |
| 120 | |
| 121 | vdd->vp_rt_data.vpconfig_erroroffset = |
| 122 | (vdd->pmic_info->vp_erroroffset << |
| 123 | vdd->vp_data->vp_common->vpconfig_erroroffset_shift); |
| 124 | |
| 125 | timeout_val = (sys_clk_speed * vdd->pmic_info->vp_timeout_us) / 1000; |
| 126 | vdd->vp_rt_data.vlimitto_timeout = timeout_val; |
| 127 | vdd->vp_rt_data.vlimitto_vddmin = vdd->pmic_info->vp_vddmin; |
| 128 | vdd->vp_rt_data.vlimitto_vddmax = vdd->pmic_info->vp_vddmax; |
| 129 | |
| 130 | waittime = ((vdd->pmic_info->step_size / vdd->pmic_info->slew_rate) * |
| 131 | sys_clk_speed) / 1000; |
| 132 | vdd->vp_rt_data.vstepmin_smpswaittimemin = waittime; |
| 133 | vdd->vp_rt_data.vstepmax_smpswaittimemax = waittime; |
| 134 | vdd->vp_rt_data.vstepmin_stepmin = vdd->pmic_info->vp_vstepmin; |
| 135 | vdd->vp_rt_data.vstepmax_stepmax = vdd->pmic_info->vp_vstepmax; |
| 136 | |
| 137 | return 0; |
| 138 | } |
| 139 | |
Thara Gopinath | 077fcec | 2010-10-27 20:29:37 +0530 | [diff] [blame] | 140 | /* Voltage debugfs support */ |
| 141 | static int vp_volt_debug_get(void *data, u64 *val) |
| 142 | { |
| 143 | struct omap_vdd_info *vdd = (struct omap_vdd_info *) data; |
| 144 | u8 vsel; |
| 145 | |
| 146 | if (!vdd) { |
| 147 | pr_warning("Wrong paramater passed\n"); |
| 148 | return -EINVAL; |
| 149 | } |
| 150 | |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 151 | vsel = vdd->read_reg(prm_mod_offs, vdd->vp_data->voltage); |
Thara Gopinath | 077fcec | 2010-10-27 20:29:37 +0530 | [diff] [blame] | 152 | pr_notice("curr_vsel = %x\n", vsel); |
| 153 | |
| 154 | if (!vdd->pmic_info->vsel_to_uv) { |
| 155 | pr_warning("PMIC function to convert vsel to voltage" |
| 156 | "in uV not registerd\n"); |
| 157 | return -EINVAL; |
| 158 | } |
| 159 | |
| 160 | *val = vdd->pmic_info->vsel_to_uv(vsel); |
| 161 | return 0; |
| 162 | } |
| 163 | |
| 164 | static int nom_volt_debug_get(void *data, u64 *val) |
| 165 | { |
| 166 | struct omap_vdd_info *vdd = (struct omap_vdd_info *) data; |
| 167 | |
| 168 | if (!vdd) { |
| 169 | pr_warning("Wrong paramater passed\n"); |
| 170 | return -EINVAL; |
| 171 | } |
| 172 | |
| 173 | *val = omap_voltage_get_nom_volt(&vdd->voltdm); |
| 174 | |
| 175 | return 0; |
| 176 | } |
| 177 | |
| 178 | DEFINE_SIMPLE_ATTRIBUTE(vp_volt_debug_fops, vp_volt_debug_get, NULL, "%llu\n"); |
| 179 | DEFINE_SIMPLE_ATTRIBUTE(nom_volt_debug_fops, nom_volt_debug_get, NULL, |
| 180 | "%llu\n"); |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 181 | static void vp_latch_vsel(struct omap_vdd_info *vdd) |
| 182 | { |
| 183 | u32 vpconfig; |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 184 | unsigned long uvdc; |
| 185 | char vsel; |
| 186 | |
| 187 | uvdc = omap_voltage_get_nom_volt(&vdd->voltdm); |
| 188 | if (!uvdc) { |
| 189 | pr_warning("%s: unable to find current voltage for vdd_%s\n", |
| 190 | __func__, vdd->voltdm.name); |
| 191 | return; |
| 192 | } |
| 193 | |
| 194 | if (!vdd->pmic_info || !vdd->pmic_info->uv_to_vsel) { |
| 195 | pr_warning("%s: PMIC function to convert voltage in uV to" |
| 196 | " vsel not registered\n", __func__); |
| 197 | return; |
| 198 | } |
| 199 | |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 200 | vsel = vdd->pmic_info->uv_to_vsel(uvdc); |
| 201 | |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 202 | vpconfig = vdd->read_reg(prm_mod_offs, vdd->vp_data->vpconfig); |
| 203 | vpconfig &= ~(vdd->vp_data->vp_common->vpconfig_initvoltage_mask | |
| 204 | vdd->vp_data->vp_common->vpconfig_initvdd); |
| 205 | vpconfig |= vsel << vdd->vp_data->vp_common->vpconfig_initvoltage_shift; |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 206 | |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 207 | vdd->write_reg(vpconfig, prm_mod_offs, vdd->vp_data->vpconfig); |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 208 | |
| 209 | /* Trigger initVDD value copy to voltage processor */ |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 210 | vdd->write_reg((vpconfig | vdd->vp_data->vp_common->vpconfig_initvdd), |
| 211 | prm_mod_offs, vdd->vp_data->vpconfig); |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 212 | |
| 213 | /* Clear initVDD copy trigger bit */ |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 214 | vdd->write_reg(vpconfig, prm_mod_offs, vdd->vp_data->vpconfig); |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 215 | } |
| 216 | |
| 217 | /* Generic voltage init functions */ |
| 218 | static void __init vp_init(struct omap_vdd_info *vdd) |
| 219 | { |
| 220 | u32 vp_val; |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 221 | |
| 222 | if (!vdd->read_reg || !vdd->write_reg) { |
| 223 | pr_err("%s: No read/write API for accessing vdd_%s regs\n", |
| 224 | __func__, vdd->voltdm.name); |
| 225 | return; |
| 226 | } |
| 227 | |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 228 | vp_val = vdd->vp_rt_data.vpconfig_erroroffset | |
| 229 | (vdd->vp_rt_data.vpconfig_errorgain << |
| 230 | vdd->vp_data->vp_common->vpconfig_errorgain_shift) | |
| 231 | vdd->vp_data->vp_common->vpconfig_timeouten; |
| 232 | vdd->write_reg(vp_val, prm_mod_offs, vdd->vp_data->vpconfig); |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 233 | |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 234 | vp_val = ((vdd->vp_rt_data.vstepmin_smpswaittimemin << |
| 235 | vdd->vp_data->vp_common->vstepmin_smpswaittimemin_shift) | |
| 236 | (vdd->vp_rt_data.vstepmin_stepmin << |
| 237 | vdd->vp_data->vp_common->vstepmin_stepmin_shift)); |
| 238 | vdd->write_reg(vp_val, prm_mod_offs, vdd->vp_data->vstepmin); |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 239 | |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 240 | vp_val = ((vdd->vp_rt_data.vstepmax_smpswaittimemax << |
| 241 | vdd->vp_data->vp_common->vstepmax_smpswaittimemax_shift) | |
| 242 | (vdd->vp_rt_data.vstepmax_stepmax << |
| 243 | vdd->vp_data->vp_common->vstepmax_stepmax_shift)); |
| 244 | vdd->write_reg(vp_val, prm_mod_offs, vdd->vp_data->vstepmax); |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 245 | |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 246 | vp_val = ((vdd->vp_rt_data.vlimitto_vddmax << |
| 247 | vdd->vp_data->vp_common->vlimitto_vddmax_shift) | |
| 248 | (vdd->vp_rt_data.vlimitto_vddmin << |
| 249 | vdd->vp_data->vp_common->vlimitto_vddmin_shift) | |
| 250 | (vdd->vp_rt_data.vlimitto_timeout << |
| 251 | vdd->vp_data->vp_common->vlimitto_timeout_shift)); |
| 252 | vdd->write_reg(vp_val, prm_mod_offs, vdd->vp_data->vlimitto); |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 253 | } |
| 254 | |
| 255 | static void __init vdd_debugfs_init(struct omap_vdd_info *vdd) |
| 256 | { |
| 257 | char *name; |
| 258 | |
| 259 | name = kzalloc(VOLTAGE_DIR_SIZE, GFP_KERNEL); |
| 260 | if (!name) { |
| 261 | pr_warning("%s: Unable to allocate memory for debugfs" |
| 262 | " directory name for vdd_%s", |
| 263 | __func__, vdd->voltdm.name); |
| 264 | return; |
| 265 | } |
| 266 | strcpy(name, "vdd_"); |
| 267 | strcat(name, vdd->voltdm.name); |
| 268 | |
| 269 | vdd->debug_dir = debugfs_create_dir(name, voltage_dir); |
Aaro Koskinen | 6227011 | 2011-01-28 18:24:11 +0200 | [diff] [blame] | 270 | kfree(name); |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 271 | if (IS_ERR(vdd->debug_dir)) { |
| 272 | pr_warning("%s: Unable to create debugfs directory for" |
| 273 | " vdd_%s\n", __func__, vdd->voltdm.name); |
| 274 | vdd->debug_dir = NULL; |
Thara Gopinath | 077fcec | 2010-10-27 20:29:37 +0530 | [diff] [blame] | 275 | return; |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 276 | } |
Thara Gopinath | 077fcec | 2010-10-27 20:29:37 +0530 | [diff] [blame] | 277 | |
| 278 | (void) debugfs_create_x16("vp_errorgain", S_IRUGO, vdd->debug_dir, |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 279 | &(vdd->vp_rt_data.vpconfig_errorgain)); |
Thara Gopinath | 077fcec | 2010-10-27 20:29:37 +0530 | [diff] [blame] | 280 | (void) debugfs_create_x16("vp_smpswaittimemin", S_IRUGO, |
| 281 | vdd->debug_dir, |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 282 | &(vdd->vp_rt_data.vstepmin_smpswaittimemin)); |
Thara Gopinath | 077fcec | 2010-10-27 20:29:37 +0530 | [diff] [blame] | 283 | (void) debugfs_create_x8("vp_stepmin", S_IRUGO, vdd->debug_dir, |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 284 | &(vdd->vp_rt_data.vstepmin_stepmin)); |
Thara Gopinath | 077fcec | 2010-10-27 20:29:37 +0530 | [diff] [blame] | 285 | (void) debugfs_create_x16("vp_smpswaittimemax", S_IRUGO, |
| 286 | vdd->debug_dir, |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 287 | &(vdd->vp_rt_data.vstepmax_smpswaittimemax)); |
Thara Gopinath | 077fcec | 2010-10-27 20:29:37 +0530 | [diff] [blame] | 288 | (void) debugfs_create_x8("vp_stepmax", S_IRUGO, vdd->debug_dir, |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 289 | &(vdd->vp_rt_data.vstepmax_stepmax)); |
Thara Gopinath | 077fcec | 2010-10-27 20:29:37 +0530 | [diff] [blame] | 290 | (void) debugfs_create_x8("vp_vddmax", S_IRUGO, vdd->debug_dir, |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 291 | &(vdd->vp_rt_data.vlimitto_vddmax)); |
Thara Gopinath | 077fcec | 2010-10-27 20:29:37 +0530 | [diff] [blame] | 292 | (void) debugfs_create_x8("vp_vddmin", S_IRUGO, vdd->debug_dir, |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 293 | &(vdd->vp_rt_data.vlimitto_vddmin)); |
Thara Gopinath | 077fcec | 2010-10-27 20:29:37 +0530 | [diff] [blame] | 294 | (void) debugfs_create_x16("vp_timeout", S_IRUGO, vdd->debug_dir, |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 295 | &(vdd->vp_rt_data.vlimitto_timeout)); |
Thara Gopinath | 077fcec | 2010-10-27 20:29:37 +0530 | [diff] [blame] | 296 | (void) debugfs_create_file("curr_vp_volt", S_IRUGO, vdd->debug_dir, |
| 297 | (void *) vdd, &vp_volt_debug_fops); |
| 298 | (void) debugfs_create_file("curr_nominal_volt", S_IRUGO, |
| 299 | vdd->debug_dir, (void *) vdd, |
| 300 | &nom_volt_debug_fops); |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 301 | } |
| 302 | |
| 303 | /* Voltage scale and accessory APIs */ |
| 304 | static int _pre_volt_scale(struct omap_vdd_info *vdd, |
| 305 | unsigned long target_volt, u8 *target_vsel, u8 *current_vsel) |
| 306 | { |
| 307 | struct omap_volt_data *volt_data; |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 308 | const struct omap_vc_common_data *vc_common; |
| 309 | const struct omap_vp_common_data *vp_common; |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 310 | u32 vc_cmdval, vp_errgain_val; |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 311 | |
| 312 | vc_common = vdd->vc_data->vc_common; |
| 313 | vp_common = vdd->vp_data->vp_common; |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 314 | |
| 315 | /* Check if suffiecient pmic info is available for this vdd */ |
| 316 | if (!vdd->pmic_info) { |
| 317 | pr_err("%s: Insufficient pmic info to scale the vdd_%s\n", |
| 318 | __func__, vdd->voltdm.name); |
| 319 | return -EINVAL; |
| 320 | } |
| 321 | |
| 322 | if (!vdd->pmic_info->uv_to_vsel) { |
| 323 | pr_err("%s: PMIC function to convert voltage in uV to" |
| 324 | "vsel not registered. Hence unable to scale voltage" |
| 325 | "for vdd_%s\n", __func__, vdd->voltdm.name); |
| 326 | return -ENODATA; |
| 327 | } |
| 328 | |
| 329 | if (!vdd->read_reg || !vdd->write_reg) { |
| 330 | pr_err("%s: No read/write API for accessing vdd_%s regs\n", |
| 331 | __func__, vdd->voltdm.name); |
| 332 | return -EINVAL; |
| 333 | } |
| 334 | |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 335 | /* Get volt_data corresponding to target_volt */ |
| 336 | volt_data = omap_voltage_get_voltdata(&vdd->voltdm, target_volt); |
| 337 | if (IS_ERR(volt_data)) |
| 338 | volt_data = NULL; |
| 339 | |
| 340 | *target_vsel = vdd->pmic_info->uv_to_vsel(target_volt); |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 341 | *current_vsel = vdd->read_reg(prm_mod_offs, vdd->vp_data->voltage); |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 342 | |
| 343 | /* Setting the ON voltage to the new target voltage */ |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 344 | vc_cmdval = vdd->read_reg(prm_mod_offs, vdd->vc_data->cmdval_reg); |
| 345 | vc_cmdval &= ~vc_common->cmd_on_mask; |
| 346 | vc_cmdval |= (*target_vsel << vc_common->cmd_on_shift); |
| 347 | vdd->write_reg(vc_cmdval, prm_mod_offs, vdd->vc_data->cmdval_reg); |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 348 | |
| 349 | /* Setting vp errorgain based on the voltage */ |
| 350 | if (volt_data) { |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 351 | vp_errgain_val = vdd->read_reg(prm_mod_offs, |
| 352 | vdd->vp_data->vpconfig); |
| 353 | vdd->vp_rt_data.vpconfig_errorgain = volt_data->vp_errgain; |
| 354 | vp_errgain_val &= ~vp_common->vpconfig_errorgain_mask; |
| 355 | vp_errgain_val |= vdd->vp_rt_data.vpconfig_errorgain << |
| 356 | vp_common->vpconfig_errorgain_shift; |
| 357 | vdd->write_reg(vp_errgain_val, prm_mod_offs, |
| 358 | vdd->vp_data->vpconfig); |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 359 | } |
| 360 | |
| 361 | return 0; |
| 362 | } |
| 363 | |
| 364 | static void _post_volt_scale(struct omap_vdd_info *vdd, |
| 365 | unsigned long target_volt, u8 target_vsel, u8 current_vsel) |
| 366 | { |
| 367 | u32 smps_steps = 0, smps_delay = 0; |
| 368 | |
| 369 | smps_steps = abs(target_vsel - current_vsel); |
| 370 | /* SMPS slew rate / step size. 2us added as buffer. */ |
| 371 | smps_delay = ((smps_steps * vdd->pmic_info->step_size) / |
| 372 | vdd->pmic_info->slew_rate) + 2; |
| 373 | udelay(smps_delay); |
| 374 | |
| 375 | vdd->curr_volt = target_volt; |
| 376 | } |
| 377 | |
| 378 | /* vc_bypass_scale_voltage - VC bypass method of voltage scaling */ |
| 379 | static int vc_bypass_scale_voltage(struct omap_vdd_info *vdd, |
| 380 | unsigned long target_volt) |
| 381 | { |
| 382 | u32 loop_cnt = 0, retries_cnt = 0; |
| 383 | u32 vc_valid, vc_bypass_val_reg, vc_bypass_value; |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 384 | u8 target_vsel, current_vsel; |
| 385 | int ret; |
| 386 | |
| 387 | ret = _pre_volt_scale(vdd, target_volt, &target_vsel, ¤t_vsel); |
| 388 | if (ret) |
| 389 | return ret; |
| 390 | |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 391 | vc_valid = vdd->vc_data->vc_common->valid; |
| 392 | vc_bypass_val_reg = vdd->vc_data->vc_common->bypass_val_reg; |
| 393 | vc_bypass_value = (target_vsel << vdd->vc_data->vc_common->data_shift) | |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 394 | (vdd->pmic_info->pmic_reg << |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 395 | vdd->vc_data->vc_common->regaddr_shift) | |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 396 | (vdd->pmic_info->i2c_slave_addr << |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 397 | vdd->vc_data->vc_common->slaveaddr_shift); |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 398 | |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 399 | vdd->write_reg(vc_bypass_value, prm_mod_offs, vc_bypass_val_reg); |
| 400 | vdd->write_reg(vc_bypass_value | vc_valid, prm_mod_offs, |
| 401 | vc_bypass_val_reg); |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 402 | |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 403 | vc_bypass_value = vdd->read_reg(prm_mod_offs, vc_bypass_val_reg); |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 404 | /* |
| 405 | * Loop till the bypass command is acknowledged from the SMPS. |
| 406 | * NOTE: This is legacy code. The loop count and retry count needs |
| 407 | * to be revisited. |
| 408 | */ |
| 409 | while (!(vc_bypass_value & vc_valid)) { |
| 410 | loop_cnt++; |
| 411 | |
| 412 | if (retries_cnt > 10) { |
| 413 | pr_warning("%s: Retry count exceeded\n", __func__); |
| 414 | return -ETIMEDOUT; |
| 415 | } |
| 416 | |
| 417 | if (loop_cnt > 50) { |
| 418 | retries_cnt++; |
| 419 | loop_cnt = 0; |
| 420 | udelay(10); |
| 421 | } |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 422 | vc_bypass_value = vdd->read_reg(prm_mod_offs, |
| 423 | vc_bypass_val_reg); |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 424 | } |
| 425 | |
| 426 | _post_volt_scale(vdd, target_volt, target_vsel, current_vsel); |
| 427 | return 0; |
| 428 | } |
| 429 | |
| 430 | /* VP force update method of voltage scaling */ |
| 431 | static int vp_forceupdate_scale_voltage(struct omap_vdd_info *vdd, |
| 432 | unsigned long target_volt) |
| 433 | { |
| 434 | u32 vpconfig; |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 435 | u8 target_vsel, current_vsel, prm_irqst_reg; |
| 436 | int ret, timeout = 0; |
| 437 | |
| 438 | ret = _pre_volt_scale(vdd, target_volt, &target_vsel, ¤t_vsel); |
| 439 | if (ret) |
| 440 | return ret; |
| 441 | |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 442 | prm_irqst_reg = vdd->vp_data->prm_irqst_data->prm_irqst_reg; |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 443 | |
| 444 | /* |
| 445 | * Clear all pending TransactionDone interrupt/status. Typical latency |
| 446 | * is <3us |
| 447 | */ |
| 448 | while (timeout++ < VP_TRANXDONE_TIMEOUT) { |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 449 | vdd->write_reg(vdd->vp_data->prm_irqst_data->tranxdone_status, |
| 450 | prm_irqst_ocp_mod_offs, prm_irqst_reg); |
| 451 | if (!(vdd->read_reg(prm_irqst_ocp_mod_offs, prm_irqst_reg) & |
| 452 | vdd->vp_data->prm_irqst_data->tranxdone_status)) |
| 453 | break; |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 454 | udelay(1); |
| 455 | } |
| 456 | if (timeout >= VP_TRANXDONE_TIMEOUT) { |
| 457 | pr_warning("%s: vdd_%s TRANXDONE timeout exceeded." |
| 458 | "Voltage change aborted", __func__, vdd->voltdm.name); |
| 459 | return -ETIMEDOUT; |
| 460 | } |
| 461 | |
| 462 | /* Configure for VP-Force Update */ |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 463 | vpconfig = vdd->read_reg(prm_mod_offs, vdd->vp_data->vpconfig); |
| 464 | vpconfig &= ~(vdd->vp_data->vp_common->vpconfig_initvdd | |
| 465 | vdd->vp_data->vp_common->vpconfig_forceupdate | |
| 466 | vdd->vp_data->vp_common->vpconfig_initvoltage_mask); |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 467 | vpconfig |= ((target_vsel << |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 468 | vdd->vp_data->vp_common->vpconfig_initvoltage_shift)); |
| 469 | vdd->write_reg(vpconfig, prm_mod_offs, vdd->vp_data->vpconfig); |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 470 | |
| 471 | /* Trigger initVDD value copy to voltage processor */ |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 472 | vpconfig |= vdd->vp_data->vp_common->vpconfig_initvdd; |
| 473 | vdd->write_reg(vpconfig, prm_mod_offs, vdd->vp_data->vpconfig); |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 474 | |
| 475 | /* Force update of voltage */ |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 476 | vpconfig |= vdd->vp_data->vp_common->vpconfig_forceupdate; |
| 477 | vdd->write_reg(vpconfig, prm_mod_offs, vdd->vp_data->vpconfig); |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 478 | |
| 479 | /* |
| 480 | * Wait for TransactionDone. Typical latency is <200us. |
| 481 | * Depends on SMPSWAITTIMEMIN/MAX and voltage change |
| 482 | */ |
| 483 | timeout = 0; |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 484 | omap_test_timeout((vdd->read_reg(prm_irqst_ocp_mod_offs, prm_irqst_reg) & |
| 485 | vdd->vp_data->prm_irqst_data->tranxdone_status), |
| 486 | VP_TRANXDONE_TIMEOUT, timeout); |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 487 | if (timeout >= VP_TRANXDONE_TIMEOUT) |
| 488 | pr_err("%s: vdd_%s TRANXDONE timeout exceeded." |
| 489 | "TRANXDONE never got set after the voltage update\n", |
| 490 | __func__, vdd->voltdm.name); |
| 491 | |
| 492 | _post_volt_scale(vdd, target_volt, target_vsel, current_vsel); |
| 493 | |
| 494 | /* |
| 495 | * Disable TransactionDone interrupt , clear all status, clear |
| 496 | * control registers |
| 497 | */ |
| 498 | timeout = 0; |
| 499 | while (timeout++ < VP_TRANXDONE_TIMEOUT) { |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 500 | vdd->write_reg(vdd->vp_data->prm_irqst_data->tranxdone_status, |
| 501 | prm_irqst_ocp_mod_offs, prm_irqst_reg); |
| 502 | if (!(vdd->read_reg(prm_irqst_ocp_mod_offs, prm_irqst_reg) & |
| 503 | vdd->vp_data->prm_irqst_data->tranxdone_status)) |
| 504 | break; |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 505 | udelay(1); |
| 506 | } |
| 507 | |
| 508 | if (timeout >= VP_TRANXDONE_TIMEOUT) |
| 509 | pr_warning("%s: vdd_%s TRANXDONE timeout exceeded while trying" |
| 510 | "to clear the TRANXDONE status\n", |
| 511 | __func__, vdd->voltdm.name); |
| 512 | |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 513 | vpconfig = vdd->read_reg(prm_mod_offs, vdd->vp_data->vpconfig); |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 514 | /* Clear initVDD copy trigger bit */ |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 515 | vpconfig &= ~vdd->vp_data->vp_common->vpconfig_initvdd; |
| 516 | vdd->write_reg(vpconfig, prm_mod_offs, vdd->vp_data->vpconfig); |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 517 | /* Clear force bit */ |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 518 | vpconfig &= ~vdd->vp_data->vp_common->vpconfig_forceupdate; |
| 519 | vdd->write_reg(vpconfig, prm_mod_offs, vdd->vp_data->vpconfig); |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 520 | |
| 521 | return 0; |
| 522 | } |
| 523 | |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 524 | static void __init omap3_vfsm_init(struct omap_vdd_info *vdd) |
| 525 | { |
| 526 | /* |
| 527 | * Voltage Manager FSM parameters init |
| 528 | * XXX This data should be passed in from the board file |
| 529 | */ |
| 530 | vdd->write_reg(OMAP3_CLKSETUP, prm_mod_offs, OMAP3_PRM_CLKSETUP_OFFSET); |
| 531 | vdd->write_reg(OMAP3_VOLTOFFSET, prm_mod_offs, |
| 532 | OMAP3_PRM_VOLTOFFSET_OFFSET); |
| 533 | vdd->write_reg(OMAP3_VOLTSETUP2, prm_mod_offs, |
| 534 | OMAP3_PRM_VOLTSETUP2_OFFSET); |
| 535 | } |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 536 | |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 537 | static void __init omap3_vc_init(struct omap_vdd_info *vdd) |
| 538 | { |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 539 | static bool is_initialized; |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 540 | u8 on_vsel, onlp_vsel, ret_vsel, off_vsel; |
| 541 | u32 vc_val; |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 542 | |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 543 | if (is_initialized) |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 544 | return; |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 545 | |
| 546 | /* Set up the on, inactive, retention and off voltage */ |
| 547 | on_vsel = vdd->pmic_info->uv_to_vsel(vdd->pmic_info->on_volt); |
| 548 | onlp_vsel = vdd->pmic_info->uv_to_vsel(vdd->pmic_info->onlp_volt); |
| 549 | ret_vsel = vdd->pmic_info->uv_to_vsel(vdd->pmic_info->ret_volt); |
| 550 | off_vsel = vdd->pmic_info->uv_to_vsel(vdd->pmic_info->off_volt); |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 551 | vc_val = ((on_vsel << vdd->vc_data->vc_common->cmd_on_shift) | |
| 552 | (onlp_vsel << vdd->vc_data->vc_common->cmd_onlp_shift) | |
| 553 | (ret_vsel << vdd->vc_data->vc_common->cmd_ret_shift) | |
| 554 | (off_vsel << vdd->vc_data->vc_common->cmd_off_shift)); |
| 555 | vdd->write_reg(vc_val, prm_mod_offs, vdd->vc_data->cmdval_reg); |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 556 | |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 557 | /* |
| 558 | * Generic VC parameters init |
| 559 | * XXX This data should be abstracted out |
| 560 | */ |
| 561 | vdd->write_reg(OMAP3430_CMD1_MASK | OMAP3430_RAV1_MASK, prm_mod_offs, |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 562 | OMAP3_PRM_VC_CH_CONF_OFFSET); |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 563 | vdd->write_reg(OMAP3430_MCODE_SHIFT | OMAP3430_HSEN_MASK, prm_mod_offs, |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 564 | OMAP3_PRM_VC_I2C_CFG_OFFSET); |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 565 | |
| 566 | omap3_vfsm_init(vdd); |
| 567 | |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 568 | is_initialized = true; |
| 569 | } |
| 570 | |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 571 | |
Thara Gopinath | bd38107 | 2010-12-10 23:15:23 +0530 | [diff] [blame] | 572 | /* OMAP4 specific voltage init functions */ |
| 573 | static void __init omap4_vc_init(struct omap_vdd_info *vdd) |
| 574 | { |
Thara Gopinath | bd38107 | 2010-12-10 23:15:23 +0530 | [diff] [blame] | 575 | static bool is_initialized; |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 576 | u32 vc_val; |
| 577 | |
| 578 | if (is_initialized) |
| 579 | return; |
| 580 | |
| 581 | /* TODO: Configure setup times and CMD_VAL values*/ |
| 582 | |
| 583 | /* |
| 584 | * Generic VC parameters init |
| 585 | * XXX This data should be abstracted out |
| 586 | */ |
| 587 | vc_val = (OMAP4430_RAV_VDD_MPU_L_MASK | OMAP4430_CMD_VDD_MPU_L_MASK | |
| 588 | OMAP4430_RAV_VDD_IVA_L_MASK | OMAP4430_CMD_VDD_IVA_L_MASK | |
| 589 | OMAP4430_RAV_VDD_CORE_L_MASK | OMAP4430_CMD_VDD_CORE_L_MASK); |
| 590 | vdd->write_reg(vc_val, prm_mod_offs, OMAP4_PRM_VC_CFG_CHANNEL_OFFSET); |
| 591 | |
| 592 | /* XXX These are magic numbers and do not belong! */ |
| 593 | vc_val = (0x60 << OMAP4430_SCLL_SHIFT | 0x26 << OMAP4430_SCLH_SHIFT); |
| 594 | vdd->write_reg(vc_val, prm_mod_offs, OMAP4_PRM_VC_CFG_I2C_CLK_OFFSET); |
| 595 | |
| 596 | is_initialized = true; |
| 597 | } |
| 598 | |
| 599 | static void __init omap_vc_init(struct omap_vdd_info *vdd) |
| 600 | { |
| 601 | u32 vc_val; |
Thara Gopinath | bd38107 | 2010-12-10 23:15:23 +0530 | [diff] [blame] | 602 | |
| 603 | if (!vdd->pmic_info || !vdd->pmic_info->uv_to_vsel) { |
| 604 | pr_err("%s: PMIC info requried to configure vc for" |
| 605 | "vdd_%s not populated.Hence cannot initialize vc\n", |
| 606 | __func__, vdd->voltdm.name); |
| 607 | return; |
| 608 | } |
| 609 | |
| 610 | if (!vdd->read_reg || !vdd->write_reg) { |
| 611 | pr_err("%s: No read/write API for accessing vdd_%s regs\n", |
| 612 | __func__, vdd->voltdm.name); |
| 613 | return; |
| 614 | } |
| 615 | |
Thara Gopinath | bd38107 | 2010-12-10 23:15:23 +0530 | [diff] [blame] | 616 | /* Set up the SMPS_SA(i2c slave address in VC */ |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 617 | vc_val = vdd->read_reg(prm_mod_offs, |
| 618 | vdd->vc_data->vc_common->smps_sa_reg); |
| 619 | vc_val &= ~vdd->vc_data->smps_sa_mask; |
| 620 | vc_val |= vdd->pmic_info->i2c_slave_addr << vdd->vc_data->smps_sa_shift; |
| 621 | vdd->write_reg(vc_val, prm_mod_offs, |
| 622 | vdd->vc_data->vc_common->smps_sa_reg); |
Thara Gopinath | bd38107 | 2010-12-10 23:15:23 +0530 | [diff] [blame] | 623 | |
| 624 | /* Setup the VOLRA(pmic reg addr) in VC */ |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 625 | vc_val = vdd->read_reg(prm_mod_offs, |
| 626 | vdd->vc_data->vc_common->smps_volra_reg); |
| 627 | vc_val &= ~vdd->vc_data->smps_volra_mask; |
| 628 | vc_val |= vdd->pmic_info->pmic_reg << vdd->vc_data->smps_volra_shift; |
| 629 | vdd->write_reg(vc_val, prm_mod_offs, |
| 630 | vdd->vc_data->vc_common->smps_volra_reg); |
Thara Gopinath | bd38107 | 2010-12-10 23:15:23 +0530 | [diff] [blame] | 631 | |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 632 | /* Configure the setup times */ |
| 633 | vc_val = vdd->read_reg(prm_mod_offs, vdd->vfsm->voltsetup_reg); |
| 634 | vc_val &= ~vdd->vfsm->voltsetup_mask; |
| 635 | vc_val |= vdd->pmic_info->volt_setup_time << |
| 636 | vdd->vfsm->voltsetup_shift; |
| 637 | vdd->write_reg(vc_val, prm_mod_offs, vdd->vfsm->voltsetup_reg); |
Thara Gopinath | bd38107 | 2010-12-10 23:15:23 +0530 | [diff] [blame] | 638 | |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 639 | if (cpu_is_omap34xx()) |
| 640 | omap3_vc_init(vdd); |
| 641 | else if (cpu_is_omap44xx()) |
| 642 | omap4_vc_init(vdd); |
Thara Gopinath | bd38107 | 2010-12-10 23:15:23 +0530 | [diff] [blame] | 643 | } |
| 644 | |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 645 | static int __init omap_vdd_data_configure(struct omap_vdd_info *vdd) |
Thara Gopinath | bd38107 | 2010-12-10 23:15:23 +0530 | [diff] [blame] | 646 | { |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 647 | int ret = -EINVAL; |
Thara Gopinath | bd38107 | 2010-12-10 23:15:23 +0530 | [diff] [blame] | 648 | |
| 649 | if (!vdd->pmic_info) { |
| 650 | pr_err("%s: PMIC info requried to configure vdd_%s not" |
| 651 | "populated.Hence cannot initialize vdd_%s\n", |
| 652 | __func__, vdd->voltdm.name, vdd->voltdm.name); |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 653 | goto ovdc_out; |
Thara Gopinath | bd38107 | 2010-12-10 23:15:23 +0530 | [diff] [blame] | 654 | } |
| 655 | |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 656 | if (IS_ERR_VALUE(_config_common_vdd_data(vdd))) |
| 657 | goto ovdc_out; |
| 658 | |
| 659 | if (cpu_is_omap34xx()) { |
| 660 | vdd->read_reg = omap3_voltage_read_reg; |
| 661 | vdd->write_reg = omap3_voltage_write_reg; |
| 662 | ret = 0; |
| 663 | } else if (cpu_is_omap44xx()) { |
| 664 | vdd->read_reg = omap4_voltage_read_reg; |
| 665 | vdd->write_reg = omap4_voltage_write_reg; |
| 666 | ret = 0; |
Thara Gopinath | bd38107 | 2010-12-10 23:15:23 +0530 | [diff] [blame] | 667 | } |
| 668 | |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 669 | ovdc_out: |
| 670 | return ret; |
Thara Gopinath | bd38107 | 2010-12-10 23:15:23 +0530 | [diff] [blame] | 671 | } |
| 672 | |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 673 | /* Public functions */ |
| 674 | /** |
| 675 | * omap_voltage_get_nom_volt() - Gets the current non-auto-compensated voltage |
| 676 | * @voltdm: pointer to the VDD for which current voltage info is needed |
| 677 | * |
| 678 | * API to get the current non-auto-compensated voltage for a VDD. |
| 679 | * Returns 0 in case of error else returns the current voltage for the VDD. |
| 680 | */ |
| 681 | unsigned long omap_voltage_get_nom_volt(struct voltagedomain *voltdm) |
| 682 | { |
| 683 | struct omap_vdd_info *vdd; |
| 684 | |
| 685 | if (!voltdm || IS_ERR(voltdm)) { |
| 686 | pr_warning("%s: VDD specified does not exist!\n", __func__); |
| 687 | return 0; |
| 688 | } |
| 689 | |
| 690 | vdd = container_of(voltdm, struct omap_vdd_info, voltdm); |
| 691 | |
| 692 | return vdd->curr_volt; |
| 693 | } |
| 694 | |
| 695 | /** |
| 696 | * omap_vp_get_curr_volt() - API to get the current vp voltage. |
| 697 | * @voltdm: pointer to the VDD. |
| 698 | * |
| 699 | * This API returns the current voltage for the specified voltage processor |
| 700 | */ |
| 701 | unsigned long omap_vp_get_curr_volt(struct voltagedomain *voltdm) |
| 702 | { |
| 703 | struct omap_vdd_info *vdd; |
| 704 | u8 curr_vsel; |
| 705 | |
| 706 | if (!voltdm || IS_ERR(voltdm)) { |
| 707 | pr_warning("%s: VDD specified does not exist!\n", __func__); |
| 708 | return 0; |
| 709 | } |
| 710 | |
| 711 | vdd = container_of(voltdm, struct omap_vdd_info, voltdm); |
| 712 | if (!vdd->read_reg) { |
| 713 | pr_err("%s: No read API for reading vdd_%s regs\n", |
| 714 | __func__, voltdm->name); |
| 715 | return 0; |
| 716 | } |
| 717 | |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 718 | curr_vsel = vdd->read_reg(prm_mod_offs, vdd->vp_data->voltage); |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 719 | |
| 720 | if (!vdd->pmic_info || !vdd->pmic_info->vsel_to_uv) { |
| 721 | pr_warning("%s: PMIC function to convert vsel to voltage" |
| 722 | "in uV not registerd\n", __func__); |
| 723 | return 0; |
| 724 | } |
| 725 | |
| 726 | return vdd->pmic_info->vsel_to_uv(curr_vsel); |
| 727 | } |
| 728 | |
| 729 | /** |
| 730 | * omap_vp_enable() - API to enable a particular VP |
| 731 | * @voltdm: pointer to the VDD whose VP is to be enabled. |
| 732 | * |
| 733 | * This API enables a particular voltage processor. Needed by the smartreflex |
| 734 | * class drivers. |
| 735 | */ |
| 736 | void omap_vp_enable(struct voltagedomain *voltdm) |
| 737 | { |
| 738 | struct omap_vdd_info *vdd; |
| 739 | u32 vpconfig; |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 740 | |
| 741 | if (!voltdm || IS_ERR(voltdm)) { |
| 742 | pr_warning("%s: VDD specified does not exist!\n", __func__); |
| 743 | return; |
| 744 | } |
| 745 | |
| 746 | vdd = container_of(voltdm, struct omap_vdd_info, voltdm); |
| 747 | if (!vdd->read_reg || !vdd->write_reg) { |
| 748 | pr_err("%s: No read/write API for accessing vdd_%s regs\n", |
| 749 | __func__, voltdm->name); |
| 750 | return; |
| 751 | } |
| 752 | |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 753 | /* If VP is already enabled, do nothing. Return */ |
| 754 | if (vdd->vp_enabled) |
| 755 | return; |
| 756 | |
| 757 | vp_latch_vsel(vdd); |
| 758 | |
| 759 | /* Enable VP */ |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 760 | vpconfig = vdd->read_reg(prm_mod_offs, vdd->vp_data->vpconfig); |
| 761 | vpconfig |= vdd->vp_data->vp_common->vpconfig_vpenable; |
| 762 | vdd->write_reg(vpconfig, prm_mod_offs, vdd->vp_data->vpconfig); |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 763 | vdd->vp_enabled = true; |
| 764 | } |
| 765 | |
| 766 | /** |
| 767 | * omap_vp_disable() - API to disable a particular VP |
| 768 | * @voltdm: pointer to the VDD whose VP is to be disabled. |
| 769 | * |
| 770 | * This API disables a particular voltage processor. Needed by the smartreflex |
| 771 | * class drivers. |
| 772 | */ |
| 773 | void omap_vp_disable(struct voltagedomain *voltdm) |
| 774 | { |
| 775 | struct omap_vdd_info *vdd; |
| 776 | u32 vpconfig; |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 777 | int timeout; |
| 778 | |
| 779 | if (!voltdm || IS_ERR(voltdm)) { |
| 780 | pr_warning("%s: VDD specified does not exist!\n", __func__); |
| 781 | return; |
| 782 | } |
| 783 | |
| 784 | vdd = container_of(voltdm, struct omap_vdd_info, voltdm); |
| 785 | if (!vdd->read_reg || !vdd->write_reg) { |
| 786 | pr_err("%s: No read/write API for accessing vdd_%s regs\n", |
| 787 | __func__, voltdm->name); |
| 788 | return; |
| 789 | } |
| 790 | |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 791 | /* If VP is already disabled, do nothing. Return */ |
| 792 | if (!vdd->vp_enabled) { |
| 793 | pr_warning("%s: Trying to disable VP for vdd_%s when" |
| 794 | "it is already disabled\n", __func__, voltdm->name); |
| 795 | return; |
| 796 | } |
| 797 | |
| 798 | /* Disable VP */ |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 799 | vpconfig = vdd->read_reg(prm_mod_offs, vdd->vp_data->vpconfig); |
| 800 | vpconfig &= ~vdd->vp_data->vp_common->vpconfig_vpenable; |
| 801 | vdd->write_reg(vpconfig, prm_mod_offs, vdd->vp_data->vpconfig); |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 802 | |
| 803 | /* |
| 804 | * Wait for VP idle Typical latency is <2us. Maximum latency is ~100us |
| 805 | */ |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 806 | omap_test_timeout((vdd->read_reg(prm_mod_offs, vdd->vp_data->vstatus)), |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 807 | VP_IDLE_TIMEOUT, timeout); |
| 808 | |
| 809 | if (timeout >= VP_IDLE_TIMEOUT) |
| 810 | pr_warning("%s: vdd_%s idle timedout\n", |
| 811 | __func__, voltdm->name); |
| 812 | |
| 813 | vdd->vp_enabled = false; |
| 814 | |
| 815 | return; |
| 816 | } |
| 817 | |
| 818 | /** |
| 819 | * omap_voltage_scale_vdd() - API to scale voltage of a particular |
| 820 | * voltage domain. |
| 821 | * @voltdm: pointer to the VDD which is to be scaled. |
| 822 | * @target_volt: The target voltage of the voltage domain |
| 823 | * |
| 824 | * This API should be called by the kernel to do the voltage scaling |
| 825 | * for a particular voltage domain during dvfs or any other situation. |
| 826 | */ |
| 827 | int omap_voltage_scale_vdd(struct voltagedomain *voltdm, |
| 828 | unsigned long target_volt) |
| 829 | { |
| 830 | struct omap_vdd_info *vdd; |
| 831 | |
| 832 | if (!voltdm || IS_ERR(voltdm)) { |
| 833 | pr_warning("%s: VDD specified does not exist!\n", __func__); |
| 834 | return -EINVAL; |
| 835 | } |
| 836 | |
| 837 | vdd = container_of(voltdm, struct omap_vdd_info, voltdm); |
| 838 | |
| 839 | if (!vdd->volt_scale) { |
| 840 | pr_err("%s: No voltage scale API registered for vdd_%s\n", |
| 841 | __func__, voltdm->name); |
| 842 | return -ENODATA; |
| 843 | } |
| 844 | |
| 845 | return vdd->volt_scale(vdd, target_volt); |
| 846 | } |
| 847 | |
| 848 | /** |
| 849 | * omap_voltage_reset() - Resets the voltage of a particular voltage domain |
| 850 | * to that of the current OPP. |
| 851 | * @voltdm: pointer to the VDD whose voltage is to be reset. |
| 852 | * |
| 853 | * This API finds out the correct voltage the voltage domain is supposed |
| 854 | * to be at and resets the voltage to that level. Should be used expecially |
| 855 | * while disabling any voltage compensation modules. |
| 856 | */ |
| 857 | void omap_voltage_reset(struct voltagedomain *voltdm) |
| 858 | { |
| 859 | unsigned long target_uvdc; |
| 860 | |
| 861 | if (!voltdm || IS_ERR(voltdm)) { |
| 862 | pr_warning("%s: VDD specified does not exist!\n", __func__); |
| 863 | return; |
| 864 | } |
| 865 | |
| 866 | target_uvdc = omap_voltage_get_nom_volt(voltdm); |
| 867 | if (!target_uvdc) { |
| 868 | pr_err("%s: unable to find current voltage for vdd_%s\n", |
| 869 | __func__, voltdm->name); |
| 870 | return; |
| 871 | } |
| 872 | |
| 873 | omap_voltage_scale_vdd(voltdm, target_uvdc); |
| 874 | } |
| 875 | |
| 876 | /** |
| 877 | * omap_voltage_get_volttable() - API to get the voltage table associated with a |
| 878 | * particular voltage domain. |
| 879 | * @voltdm: pointer to the VDD for which the voltage table is required |
| 880 | * @volt_data: the voltage table for the particular vdd which is to be |
| 881 | * populated by this API |
| 882 | * |
| 883 | * This API populates the voltage table associated with a VDD into the |
| 884 | * passed parameter pointer. Returns the count of distinct voltages |
| 885 | * supported by this vdd. |
| 886 | * |
| 887 | */ |
| 888 | void omap_voltage_get_volttable(struct voltagedomain *voltdm, |
| 889 | struct omap_volt_data **volt_data) |
| 890 | { |
| 891 | struct omap_vdd_info *vdd; |
| 892 | |
| 893 | if (!voltdm || IS_ERR(voltdm)) { |
| 894 | pr_warning("%s: VDD specified does not exist!\n", __func__); |
| 895 | return; |
| 896 | } |
| 897 | |
| 898 | vdd = container_of(voltdm, struct omap_vdd_info, voltdm); |
| 899 | |
| 900 | *volt_data = vdd->volt_data; |
| 901 | } |
| 902 | |
| 903 | /** |
| 904 | * omap_voltage_get_voltdata() - API to get the voltage table entry for a |
| 905 | * particular voltage |
| 906 | * @voltdm: pointer to the VDD whose voltage table has to be searched |
| 907 | * @volt: the voltage to be searched in the voltage table |
| 908 | * |
| 909 | * This API searches through the voltage table for the required voltage |
| 910 | * domain and tries to find a matching entry for the passed voltage volt. |
| 911 | * If a matching entry is found volt_data is populated with that entry. |
| 912 | * This API searches only through the non-compensated voltages int the |
| 913 | * voltage table. |
| 914 | * Returns pointer to the voltage table entry corresponding to volt on |
| 915 | * sucess. Returns -ENODATA if no voltage table exisits for the passed voltage |
| 916 | * domain or if there is no matching entry. |
| 917 | */ |
| 918 | struct omap_volt_data *omap_voltage_get_voltdata(struct voltagedomain *voltdm, |
| 919 | unsigned long volt) |
| 920 | { |
| 921 | struct omap_vdd_info *vdd; |
| 922 | int i; |
| 923 | |
| 924 | if (!voltdm || IS_ERR(voltdm)) { |
| 925 | pr_warning("%s: VDD specified does not exist!\n", __func__); |
| 926 | return ERR_PTR(-EINVAL); |
| 927 | } |
| 928 | |
| 929 | vdd = container_of(voltdm, struct omap_vdd_info, voltdm); |
| 930 | |
| 931 | if (!vdd->volt_data) { |
| 932 | pr_warning("%s: voltage table does not exist for vdd_%s\n", |
| 933 | __func__, voltdm->name); |
| 934 | return ERR_PTR(-ENODATA); |
| 935 | } |
| 936 | |
| 937 | for (i = 0; vdd->volt_data[i].volt_nominal != 0; i++) { |
| 938 | if (vdd->volt_data[i].volt_nominal == volt) |
| 939 | return &vdd->volt_data[i]; |
| 940 | } |
| 941 | |
| 942 | pr_notice("%s: Unable to match the current voltage with the voltage" |
| 943 | "table for vdd_%s\n", __func__, voltdm->name); |
| 944 | |
| 945 | return ERR_PTR(-ENODATA); |
| 946 | } |
| 947 | |
| 948 | /** |
| 949 | * omap_voltage_register_pmic() - API to register PMIC specific data |
| 950 | * @voltdm: pointer to the VDD for which the PMIC specific data is |
| 951 | * to be registered |
| 952 | * @pmic_info: the structure containing pmic info |
| 953 | * |
| 954 | * This API is to be called by the SOC/PMIC file to specify the |
| 955 | * pmic specific info as present in omap_volt_pmic_info structure. |
| 956 | */ |
| 957 | int omap_voltage_register_pmic(struct voltagedomain *voltdm, |
| 958 | struct omap_volt_pmic_info *pmic_info) |
| 959 | { |
| 960 | struct omap_vdd_info *vdd; |
| 961 | |
| 962 | if (!voltdm || IS_ERR(voltdm)) { |
| 963 | pr_warning("%s: VDD specified does not exist!\n", __func__); |
| 964 | return -EINVAL; |
| 965 | } |
| 966 | |
| 967 | vdd = container_of(voltdm, struct omap_vdd_info, voltdm); |
| 968 | |
| 969 | vdd->pmic_info = pmic_info; |
| 970 | |
| 971 | return 0; |
| 972 | } |
| 973 | |
| 974 | /** |
| 975 | * omap_voltage_get_dbgdir() - API to get pointer to the debugfs directory |
| 976 | * corresponding to a voltage domain. |
| 977 | * |
| 978 | * @voltdm: pointer to the VDD whose debug directory is required. |
| 979 | * |
| 980 | * This API returns pointer to the debugfs directory corresponding |
| 981 | * to the voltage domain. Should be used by drivers requiring to |
| 982 | * add any debug entry for a particular voltage domain. Returns NULL |
| 983 | * in case of error. |
| 984 | */ |
| 985 | struct dentry *omap_voltage_get_dbgdir(struct voltagedomain *voltdm) |
| 986 | { |
| 987 | struct omap_vdd_info *vdd; |
| 988 | |
| 989 | if (!voltdm || IS_ERR(voltdm)) { |
| 990 | pr_warning("%s: VDD specified does not exist!\n", __func__); |
| 991 | return NULL; |
| 992 | } |
| 993 | |
| 994 | vdd = container_of(voltdm, struct omap_vdd_info, voltdm); |
| 995 | |
| 996 | return vdd->debug_dir; |
| 997 | } |
| 998 | |
| 999 | /** |
| 1000 | * omap_change_voltscale_method() - API to change the voltage scaling method. |
| 1001 | * @voltdm: pointer to the VDD whose voltage scaling method |
| 1002 | * has to be changed. |
| 1003 | * @voltscale_method: the method to be used for voltage scaling. |
| 1004 | * |
| 1005 | * This API can be used by the board files to change the method of voltage |
| 1006 | * scaling between vpforceupdate and vcbypass. The parameter values are |
| 1007 | * defined in voltage.h |
| 1008 | */ |
| 1009 | void omap_change_voltscale_method(struct voltagedomain *voltdm, |
| 1010 | int voltscale_method) |
| 1011 | { |
| 1012 | struct omap_vdd_info *vdd; |
| 1013 | |
| 1014 | if (!voltdm || IS_ERR(voltdm)) { |
| 1015 | pr_warning("%s: VDD specified does not exist!\n", __func__); |
| 1016 | return; |
| 1017 | } |
| 1018 | |
| 1019 | vdd = container_of(voltdm, struct omap_vdd_info, voltdm); |
| 1020 | |
| 1021 | switch (voltscale_method) { |
| 1022 | case VOLTSCALE_VPFORCEUPDATE: |
| 1023 | vdd->volt_scale = vp_forceupdate_scale_voltage; |
| 1024 | return; |
| 1025 | case VOLTSCALE_VCBYPASS: |
| 1026 | vdd->volt_scale = vc_bypass_scale_voltage; |
| 1027 | return; |
| 1028 | default: |
| 1029 | pr_warning("%s: Trying to change the method of voltage scaling" |
| 1030 | "to an unsupported one!\n", __func__); |
| 1031 | } |
| 1032 | } |
| 1033 | |
| 1034 | /** |
| 1035 | * omap_voltage_domain_lookup() - API to get the voltage domain pointer |
| 1036 | * @name: Name of the voltage domain |
| 1037 | * |
| 1038 | * This API looks up in the global vdd_info struct for the |
| 1039 | * existence of voltage domain <name>. If it exists, the API returns |
| 1040 | * a pointer to the voltage domain structure corresponding to the |
| 1041 | * VDD<name>. Else retuns error pointer. |
| 1042 | */ |
| 1043 | struct voltagedomain *omap_voltage_domain_lookup(char *name) |
| 1044 | { |
| 1045 | int i; |
| 1046 | |
| 1047 | if (!vdd_info) { |
| 1048 | pr_err("%s: Voltage driver init not yet happened.Faulting!\n", |
| 1049 | __func__); |
| 1050 | return ERR_PTR(-EINVAL); |
| 1051 | } |
| 1052 | |
| 1053 | if (!name) { |
| 1054 | pr_err("%s: No name to get the votage domain!\n", __func__); |
| 1055 | return ERR_PTR(-EINVAL); |
| 1056 | } |
| 1057 | |
| 1058 | for (i = 0; i < nr_scalable_vdd; i++) { |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 1059 | if (!(strcmp(name, vdd_info[i]->voltdm.name))) |
| 1060 | return &vdd_info[i]->voltdm; |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 1061 | } |
| 1062 | |
| 1063 | return ERR_PTR(-EINVAL); |
| 1064 | } |
| 1065 | |
| 1066 | /** |
| 1067 | * omap_voltage_late_init() - Init the various voltage parameters |
| 1068 | * |
| 1069 | * This API is to be called in the later stages of the |
| 1070 | * system boot to init the voltage controller and |
| 1071 | * voltage processors. |
| 1072 | */ |
| 1073 | int __init omap_voltage_late_init(void) |
| 1074 | { |
| 1075 | int i; |
| 1076 | |
| 1077 | if (!vdd_info) { |
| 1078 | pr_err("%s: Voltage driver support not added\n", |
| 1079 | __func__); |
| 1080 | return -EINVAL; |
| 1081 | } |
| 1082 | |
| 1083 | voltage_dir = debugfs_create_dir("voltage", NULL); |
| 1084 | if (IS_ERR(voltage_dir)) |
| 1085 | pr_err("%s: Unable to create voltage debugfs main dir\n", |
| 1086 | __func__); |
| 1087 | for (i = 0; i < nr_scalable_vdd; i++) { |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 1088 | if (omap_vdd_data_configure(vdd_info[i])) |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 1089 | continue; |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 1090 | omap_vc_init(vdd_info[i]); |
| 1091 | vp_init(vdd_info[i]); |
| 1092 | vdd_debugfs_init(vdd_info[i]); |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 1093 | } |
| 1094 | |
| 1095 | return 0; |
| 1096 | } |
| 1097 | |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 1098 | /* XXX document */ |
| 1099 | int __init omap_voltage_early_init(s16 prm_mod, s16 prm_irqst_ocp_mod, |
| 1100 | struct omap_vdd_info *omap_vdd_array[], |
| 1101 | u8 omap_vdd_count) |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 1102 | { |
Paul Walmsley | c0718df | 2011-03-10 22:17:45 -0700 | [diff] [blame] | 1103 | prm_mod_offs = prm_mod; |
| 1104 | prm_irqst_ocp_mod_offs = prm_irqst_ocp_mod; |
| 1105 | vdd_info = omap_vdd_array; |
| 1106 | nr_scalable_vdd = omap_vdd_count; |
Thara Gopinath | 2f34ce8 | 2010-05-29 22:02:21 +0530 | [diff] [blame] | 1107 | return 0; |
| 1108 | } |