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8b765d727d
Associate a name with each SmartReflex instance from the hwmod data, rather than attempting to reuse the name of a voltage domain. The name from hwmod better reflects the smartreflex integration in the system. Also have the name passed to the drivers using pdata, which helps to remove any dependencies on SoC-specific structures. Signed-off-by: Jean Pihet <j-pihet@ti.com> Signed-off-by: J Keerthy <j-keerthy@ti.com> Reviewed-by: Kevin Hilman <khilman@ti.com> Signed-off-by: Kevin Hilman <khilman@ti.com>
143 lines
3.5 KiB
C
143 lines
3.5 KiB
C
/*
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* OMAP3/OMAP4 smartreflex device file
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*
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* Author: Thara Gopinath <thara@ti.com>
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*
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* Based originally on code from smartreflex.c
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* Copyright (C) 2010 Texas Instruments, Inc.
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* Thara Gopinath <thara@ti.com>
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*
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* Copyright (C) 2008 Nokia Corporation
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* Kalle Jokiniemi
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*
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* Copyright (C) 2007 Texas Instruments, Inc.
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* Lesly A M <x0080970@ti.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/power/smartreflex.h>
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#include <linux/err.h>
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#include <linux/slab.h>
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#include <linux/io.h>
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#include <plat/omap_device.h>
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#include "voltage.h"
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#include "control.h"
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#include "pm.h"
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static bool sr_enable_on_init;
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/* Read EFUSE values from control registers for OMAP3430 */
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static void __init sr_set_nvalues(struct omap_volt_data *volt_data,
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struct omap_sr_data *sr_data)
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{
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struct omap_sr_nvalue_table *nvalue_table;
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int i, count = 0;
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while (volt_data[count].volt_nominal)
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count++;
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nvalue_table = kzalloc(sizeof(struct omap_sr_nvalue_table)*count,
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GFP_KERNEL);
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for (i = 0; i < count; i++) {
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u32 v;
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/*
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* In OMAP4 the efuse registers are 24 bit aligned.
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* A __raw_readl will fail for non-32 bit aligned address
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* and hence the 8-bit read and shift.
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*/
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if (cpu_is_omap44xx()) {
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u16 offset = volt_data[i].sr_efuse_offs;
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v = omap_ctrl_readb(offset) |
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omap_ctrl_readb(offset + 1) << 8 |
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omap_ctrl_readb(offset + 2) << 16;
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} else {
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v = omap_ctrl_readl(volt_data[i].sr_efuse_offs);
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}
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nvalue_table[i].efuse_offs = volt_data[i].sr_efuse_offs;
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nvalue_table[i].nvalue = v;
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}
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sr_data->nvalue_table = nvalue_table;
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sr_data->nvalue_count = count;
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}
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static int __init sr_dev_init(struct omap_hwmod *oh, void *user)
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{
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struct omap_sr_data *sr_data;
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struct platform_device *pdev;
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struct omap_volt_data *volt_data;
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struct omap_smartreflex_dev_attr *sr_dev_attr;
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char *name = "smartreflex";
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static int i;
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sr_data = kzalloc(sizeof(struct omap_sr_data), GFP_KERNEL);
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if (!sr_data) {
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pr_err("%s: Unable to allocate memory for %s sr_data.Error!\n",
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__func__, oh->name);
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return -ENOMEM;
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}
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sr_dev_attr = (struct omap_smartreflex_dev_attr *)oh->dev_attr;
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if (!sr_dev_attr || !sr_dev_attr->sensor_voltdm_name) {
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pr_err("%s: No voltage domain specified for %s."
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"Cannot initialize\n", __func__,
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oh->name);
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goto exit;
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}
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sr_data->name = oh->name;
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sr_data->ip_type = oh->class->rev;
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sr_data->senn_mod = 0x1;
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sr_data->senp_mod = 0x1;
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sr_data->voltdm = voltdm_lookup(sr_dev_attr->sensor_voltdm_name);
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if (IS_ERR(sr_data->voltdm)) {
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pr_err("%s: Unable to get voltage domain pointer for VDD %s\n",
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__func__, sr_dev_attr->sensor_voltdm_name);
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goto exit;
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}
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omap_voltage_get_volttable(sr_data->voltdm, &volt_data);
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if (!volt_data) {
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pr_warning("%s: No Voltage table registerd fo VDD%d."
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"Something really wrong\n\n", __func__, i + 1);
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goto exit;
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}
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sr_set_nvalues(volt_data, sr_data);
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sr_data->enable_on_init = sr_enable_on_init;
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pdev = omap_device_build(name, i, oh, sr_data, sizeof(*sr_data),
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NULL, 0, 0);
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if (IS_ERR(pdev))
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pr_warning("%s: Could not build omap_device for %s: %s.\n\n",
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__func__, name, oh->name);
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exit:
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i++;
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kfree(sr_data);
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return 0;
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}
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/*
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* API to be called from board files to enable smartreflex
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* autocompensation at init.
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*/
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void __init omap_enable_smartreflex_on_init(void)
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{
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sr_enable_on_init = true;
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}
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int __init omap_devinit_smartreflex(void)
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{
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return omap_hwmod_for_each_by_class("smartreflex", sr_dev_init, NULL);
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}
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