147 lines
3.6 KiB
C
147 lines
3.6 KiB
C
/*
|
|
* OMAP3/OMAP4 smartreflex device file
|
|
*
|
|
* Author: Thara Gopinath <thara@ti.com>
|
|
*
|
|
* Based originally on code from smartreflex.c
|
|
* Copyright (C) 2010 Texas Instruments, Inc.
|
|
* Thara Gopinath <thara@ti.com>
|
|
*
|
|
* Copyright (C) 2008 Nokia Corporation
|
|
* Kalle Jokiniemi
|
|
*
|
|
* Copyright (C) 2007 Texas Instruments, Inc.
|
|
* Lesly A M <x0080970@ti.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/err.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/io.h>
|
|
|
|
#include <plat/omap_device.h>
|
|
#include <plat/smartreflex.h>
|
|
#include <plat/voltage.h>
|
|
|
|
#include "control.h"
|
|
|
|
static bool sr_enable_on_init;
|
|
|
|
static struct omap_device_pm_latency omap_sr_latency[] = {
|
|
{
|
|
.deactivate_func = omap_device_idle_hwmods,
|
|
.activate_func = omap_device_enable_hwmods,
|
|
.flags = OMAP_DEVICE_LATENCY_AUTO_ADJUST
|
|
},
|
|
};
|
|
|
|
/* Read EFUSE values from control registers for OMAP3430 */
|
|
static void __init sr_set_nvalues(struct omap_volt_data *volt_data,
|
|
struct omap_sr_data *sr_data)
|
|
{
|
|
struct omap_sr_nvalue_table *nvalue_table;
|
|
int i, count = 0;
|
|
|
|
while (volt_data[count].volt_nominal)
|
|
count++;
|
|
|
|
nvalue_table = kzalloc(sizeof(struct omap_sr_nvalue_table)*count,
|
|
GFP_KERNEL);
|
|
|
|
for (i = 0; i < count; i++) {
|
|
u32 v;
|
|
/*
|
|
* In OMAP4 the efuse registers are 24 bit aligned.
|
|
* A __raw_readl will fail for non-32 bit aligned address
|
|
* and hence the 8-bit read and shift.
|
|
*/
|
|
if (cpu_is_omap44xx()) {
|
|
u16 offset = volt_data[i].sr_efuse_offs;
|
|
|
|
v = omap_ctrl_readb(offset) |
|
|
omap_ctrl_readb(offset + 1) << 8 |
|
|
omap_ctrl_readb(offset + 2) << 16;
|
|
} else {
|
|
v = omap_ctrl_readl(volt_data[i].sr_efuse_offs);
|
|
}
|
|
|
|
nvalue_table[i].efuse_offs = volt_data[i].sr_efuse_offs;
|
|
nvalue_table[i].nvalue = v;
|
|
}
|
|
|
|
sr_data->nvalue_table = nvalue_table;
|
|
sr_data->nvalue_count = count;
|
|
}
|
|
|
|
static int sr_dev_init(struct omap_hwmod *oh, void *user)
|
|
{
|
|
struct omap_sr_data *sr_data;
|
|
struct omap_device *od;
|
|
struct omap_volt_data *volt_data;
|
|
char *name = "smartreflex";
|
|
static int i;
|
|
|
|
sr_data = kzalloc(sizeof(struct omap_sr_data), GFP_KERNEL);
|
|
if (!sr_data) {
|
|
pr_err("%s: Unable to allocate memory for %s sr_data.Error!\n",
|
|
__func__, oh->name);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
if (!oh->vdd_name) {
|
|
pr_err("%s: No voltage domain specified for %s."
|
|
"Cannot initialize\n", __func__, oh->name);
|
|
goto exit;
|
|
}
|
|
|
|
sr_data->ip_type = oh->class->rev;
|
|
sr_data->senn_mod = 0x1;
|
|
sr_data->senp_mod = 0x1;
|
|
|
|
sr_data->voltdm = omap_voltage_domain_lookup(oh->vdd_name);
|
|
if (IS_ERR(sr_data->voltdm)) {
|
|
pr_err("%s: Unable to get voltage domain pointer for VDD %s\n",
|
|
__func__, oh->vdd_name);
|
|
goto exit;
|
|
}
|
|
|
|
omap_voltage_get_volttable(sr_data->voltdm, &volt_data);
|
|
if (!volt_data) {
|
|
pr_warning("%s: No Voltage table registerd fo VDD%d."
|
|
"Something really wrong\n\n", __func__, i + 1);
|
|
goto exit;
|
|
}
|
|
|
|
sr_set_nvalues(volt_data, sr_data);
|
|
|
|
sr_data->enable_on_init = sr_enable_on_init;
|
|
|
|
od = omap_device_build(name, i, oh, sr_data, sizeof(*sr_data),
|
|
omap_sr_latency,
|
|
ARRAY_SIZE(omap_sr_latency), 0);
|
|
if (IS_ERR(od))
|
|
pr_warning("%s: Could not build omap_device for %s: %s.\n\n",
|
|
__func__, name, oh->name);
|
|
exit:
|
|
i++;
|
|
kfree(sr_data);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* API to be called from board files to enable smartreflex
|
|
* autocompensation at init.
|
|
*/
|
|
void __init omap_enable_smartreflex_on_init(void)
|
|
{
|
|
sr_enable_on_init = true;
|
|
}
|
|
|
|
int __init omap_devinit_smartreflex(void)
|
|
{
|
|
return omap_hwmod_for_each_by_class("smartreflex", sr_dev_init, NULL);
|
|
}
|