projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 0c0a5d61 TG |
1 | /* |
| 2 | * OMAP3/OMAP4 smartreflex device file | |
| 3 | * | |
| 4 | * Author: Thara Gopinath <thara@ti.com> | |
| 5 | * | |
| 6 | * Based originally on code from smartreflex.c | |
| 7 | * Copyright (C) 2010 Texas Instruments, Inc. | |
| 8 | * Thara Gopinath <thara@ti.com> | |
| 9 | * | |
| 10 | * Copyright (C) 2008 Nokia Corporation | |
| 11 | * Kalle Jokiniemi | |
| 12 | * | |
| 13 | * Copyright (C) 2007 Texas Instruments, Inc. | |
| 14 | * Lesly A M <x0080970@ti.com> | |
| 15 | * | |
| 16 | * This program is free software; you can redistribute it and/or modify | |
| 17 | * it under the terms of the GNU General Public License version 2 as | |
| 18 | * published by the Free Software Foundation. | |
| 19 | */ | |
| 20 | ||
| 21 | #include <linux/err.h> | |
| 22 | #include <linux/slab.h> | |
| 23 | ||
| 24 | #include <plat/omap_device.h> | |
| 25 | #include <plat/smartreflex.h> | |
| 26 | #include <plat/voltage.h> | |
| 27 | ||
| 28 | #include "control.h" | |
| 29 | ||
| 30 | static bool sr_enable_on_init; | |
| 31 | ||
| 32 | static struct omap_device_pm_latency omap_sr_latency[] = { | |
| 33 | { | |
| 34 | .deactivate_func = omap_device_idle_hwmods, | |
| 35 | .activate_func = omap_device_enable_hwmods, | |
| 36 | .flags = OMAP_DEVICE_LATENCY_AUTO_ADJUST | |
| 37 | }, | |
| 38 | }; | |
| 39 | ||
| 40 | /* Read EFUSE values from control registers for OMAP3430 */ | |
| 41 | static void __init sr_set_nvalues(struct omap_volt_data *volt_data, | |
| 42 | struct omap_sr_data *sr_data) | |
| 43 | { | |
| 44 | struct omap_sr_nvalue_table *nvalue_table; | |
| 45 | int i, count = 0; | |
| 46 | ||
| 47 | while (volt_data[count].volt_nominal) | |
| 48 | count++; | |
| 49 | ||
| 50 | nvalue_table = kzalloc(sizeof(struct omap_sr_nvalue_table)*count, | |
| 51 | GFP_KERNEL); | |
| 52 | ||
| 53 | for (i = 0; i < count; i++) { | |
| 54 | u32 v = omap_ctrl_readl(volt_data[i].sr_efuse_offs); | |
| 55 | ||
| 56 | nvalue_table[i].efuse_offs = volt_data[i].sr_efuse_offs; | |
| 57 | nvalue_table[i].nvalue = v; | |
| 58 | } | |
| 59 | ||
| 60 | sr_data->nvalue_table = nvalue_table; | |
| 61 | sr_data->nvalue_count = count; | |
| 62 | } | |
| 63 | ||
| 64 | static int sr_dev_init(struct omap_hwmod *oh, void *user) | |
| 65 | { | |
| 66 | struct omap_sr_data *sr_data; | |
| 67 | struct omap_device *od; | |
| 68 | struct omap_volt_data *volt_data; | |
| 69 | char *name = "smartreflex"; | |
| 70 | static int i; | |
| 71 | ||
| 72 | sr_data = kzalloc(sizeof(struct omap_sr_data), GFP_KERNEL); | |
| 73 | if (!sr_data) { | |
| 74 | pr_err("%s: Unable to allocate memory for %s sr_data.Error!\n", | |
| 75 | __func__, oh->name); | |
| 76 | return -ENOMEM; | |
| 77 | } | |
| 78 | ||
| 79 | if (!oh->vdd_name) { | |
| 80 | pr_err("%s: No voltage domain specified for %s." | |
| 81 | "Cannot initialize\n", __func__, oh->name); | |
| 82 | goto exit; | |
| 83 | } | |
| 84 | ||
| 85 | sr_data->ip_type = oh->class->rev; | |
| 86 | sr_data->senn_mod = 0x1; | |
| 87 | sr_data->senp_mod = 0x1; | |
| 88 | ||
| 89 | sr_data->voltdm = omap_voltage_domain_lookup(oh->vdd_name); | |
| 90 | if (IS_ERR(sr_data->voltdm)) { | |
| 91 | pr_err("%s: Unable to get voltage domain pointer for VDD %s\n", | |
| 92 | __func__, oh->vdd_name); | |
| 93 | goto exit; | |
| 94 | } | |
| 95 | ||
| 96 | omap_voltage_get_volttable(sr_data->voltdm, &volt_data); | |
| 97 | if (!volt_data) { | |
| 98 | pr_warning("%s: No Voltage table registerd fo VDD%d." | |
| 99 | "Something really wrong\n\n", __func__, i + 1); | |
| 100 | goto exit; | |
| 101 | } | |
| 102 | ||
| 103 | sr_set_nvalues(volt_data, sr_data); | |
| 104 | ||
| 105 | sr_data->enable_on_init = sr_enable_on_init; | |
| 106 | ||
| 107 | od = omap_device_build(name, i, oh, sr_data, sizeof(*sr_data), | |
| 108 | omap_sr_latency, | |
| 109 | ARRAY_SIZE(omap_sr_latency), 0); | |
| 110 | if (IS_ERR(od)) | |
| 111 | pr_warning("%s: Could not build omap_device for %s: %s.\n\n", | |
| 112 | __func__, name, oh->name); | |
| 113 | exit: | |
| 114 | i++; | |
| 115 | kfree(sr_data); | |
| 116 | return 0; | |
| 117 | } | |
| 118 | ||
| 119 | /* | |
| 120 | * API to be called from board files to enable smartreflex | |
| 121 | * autocompensation at init. | |
| 122 | */ | |
| 123 | void __init omap_enable_smartreflex_on_init(void) | |
| 124 | { | |
| 125 | sr_enable_on_init = true; | |
| 126 | } | |
| 127 | ||
| 128 | int __init omap_devinit_smartreflex(void) | |
| 129 | { | |
| 130 | return omap_hwmod_for_each_by_class("smartreflex", sr_dev_init, NULL); | |
| 131 | } |