![Thierry Reding](/assets/img/avatar_default.png)
Increase the readability of the CVB frequency table by reformatting it a little. Signed-off-by: Thierry Reding <treding@nvidia.com>
184 lines
5.1 KiB
C
184 lines
5.1 KiB
C
/*
|
|
* Tegra124 DFLL FCPU clock source driver
|
|
*
|
|
* Copyright (C) 2012-2014 NVIDIA Corporation. All rights reserved.
|
|
*
|
|
* Aleksandr Frid <afrid@nvidia.com>
|
|
* Paul Walmsley <pwalmsley@nvidia.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.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
*/
|
|
|
|
#include <linux/cpu.h>
|
|
#include <linux/err.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/platform_device.h>
|
|
#include <soc/tegra/fuse.h>
|
|
|
|
#include "clk.h"
|
|
#include "clk-dfll.h"
|
|
#include "cvb.h"
|
|
|
|
/* Maximum CPU frequency, indexed by CPU speedo id */
|
|
static const unsigned long cpu_max_freq_table[] = {
|
|
[0] = 2014500000UL,
|
|
[1] = 2320500000UL,
|
|
[2] = 2116500000UL,
|
|
[3] = 2524500000UL,
|
|
};
|
|
|
|
static const struct cvb_table tegra124_cpu_cvb_tables[] = {
|
|
{
|
|
.speedo_id = -1,
|
|
.process_id = -1,
|
|
.min_millivolts = 900,
|
|
.max_millivolts = 1260,
|
|
.alignment = {
|
|
.step_uv = 10000, /* 10mV */
|
|
},
|
|
.speedo_scale = 100,
|
|
.voltage_scale = 1000,
|
|
.entries = {
|
|
{ 204000000UL, { 1112619, -29295, 402 } },
|
|
{ 306000000UL, { 1150460, -30585, 402 } },
|
|
{ 408000000UL, { 1190122, -31865, 402 } },
|
|
{ 510000000UL, { 1231606, -33155, 402 } },
|
|
{ 612000000UL, { 1274912, -34435, 402 } },
|
|
{ 714000000UL, { 1320040, -35725, 402 } },
|
|
{ 816000000UL, { 1366990, -37005, 402 } },
|
|
{ 918000000UL, { 1415762, -38295, 402 } },
|
|
{ 1020000000UL, { 1466355, -39575, 402 } },
|
|
{ 1122000000UL, { 1518771, -40865, 402 } },
|
|
{ 1224000000UL, { 1573009, -42145, 402 } },
|
|
{ 1326000000UL, { 1629068, -43435, 402 } },
|
|
{ 1428000000UL, { 1686950, -44715, 402 } },
|
|
{ 1530000000UL, { 1746653, -46005, 402 } },
|
|
{ 1632000000UL, { 1808179, -47285, 402 } },
|
|
{ 1734000000UL, { 1871526, -48575, 402 } },
|
|
{ 1836000000UL, { 1936696, -49855, 402 } },
|
|
{ 1938000000UL, { 2003687, -51145, 402 } },
|
|
{ 2014500000UL, { 2054787, -52095, 402 } },
|
|
{ 2116500000UL, { 2124957, -53385, 402 } },
|
|
{ 2218500000UL, { 2196950, -54665, 402 } },
|
|
{ 2320500000UL, { 2270765, -55955, 402 } },
|
|
{ 2422500000UL, { 2346401, -57235, 402 } },
|
|
{ 2524500000UL, { 2437299, -58535, 402 } },
|
|
{ 0UL, { 0, 0, 0 } },
|
|
},
|
|
.cpu_dfll_data = {
|
|
.tune0_low = 0x005020ff,
|
|
.tune0_high = 0x005040ff,
|
|
.tune1 = 0x00000060,
|
|
}
|
|
},
|
|
};
|
|
|
|
static int tegra124_dfll_fcpu_probe(struct platform_device *pdev)
|
|
{
|
|
int process_id, speedo_id, speedo_value, err;
|
|
struct tegra_dfll_soc_data *soc;
|
|
|
|
process_id = tegra_sku_info.cpu_process_id;
|
|
speedo_id = tegra_sku_info.cpu_speedo_id;
|
|
speedo_value = tegra_sku_info.cpu_speedo_value;
|
|
|
|
if (speedo_id >= ARRAY_SIZE(cpu_max_freq_table)) {
|
|
dev_err(&pdev->dev, "unknown max CPU freq for speedo_id=%d\n",
|
|
speedo_id);
|
|
return -ENODEV;
|
|
}
|
|
|
|
soc = devm_kzalloc(&pdev->dev, sizeof(*soc), GFP_KERNEL);
|
|
if (!soc)
|
|
return -ENOMEM;
|
|
|
|
soc->dev = get_cpu_device(0);
|
|
if (!soc->dev) {
|
|
dev_err(&pdev->dev, "no CPU0 device\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
soc->max_freq = cpu_max_freq_table[speedo_id];
|
|
|
|
soc->cvb = tegra_cvb_add_opp_table(soc->dev, tegra124_cpu_cvb_tables,
|
|
ARRAY_SIZE(tegra124_cpu_cvb_tables),
|
|
process_id, speedo_id, speedo_value,
|
|
soc->max_freq);
|
|
if (IS_ERR(soc->cvb)) {
|
|
dev_err(&pdev->dev, "couldn't add OPP table: %ld\n",
|
|
PTR_ERR(soc->cvb));
|
|
return PTR_ERR(soc->cvb);
|
|
}
|
|
|
|
err = tegra_dfll_register(pdev, soc);
|
|
if (err < 0) {
|
|
tegra_cvb_remove_opp_table(soc->dev, soc->cvb, soc->max_freq);
|
|
return err;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, soc);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tegra124_dfll_fcpu_remove(struct platform_device *pdev)
|
|
{
|
|
struct tegra_dfll_soc_data *soc = platform_get_drvdata(pdev);
|
|
int err;
|
|
|
|
err = tegra_dfll_unregister(pdev);
|
|
if (err < 0)
|
|
dev_err(&pdev->dev, "failed to unregister DFLL: %d\n", err);
|
|
|
|
tegra_cvb_remove_opp_table(soc->dev, soc->cvb, soc->max_freq);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id tegra124_dfll_fcpu_of_match[] = {
|
|
{ .compatible = "nvidia,tegra124-dfll", },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(of, tegra124_dfll_fcpu_of_match);
|
|
|
|
static const struct dev_pm_ops tegra124_dfll_pm_ops = {
|
|
SET_RUNTIME_PM_OPS(tegra_dfll_runtime_suspend,
|
|
tegra_dfll_runtime_resume, NULL)
|
|
};
|
|
|
|
static struct platform_driver tegra124_dfll_fcpu_driver = {
|
|
.probe = tegra124_dfll_fcpu_probe,
|
|
.remove = tegra124_dfll_fcpu_remove,
|
|
.driver = {
|
|
.name = "tegra124-dfll",
|
|
.of_match_table = tegra124_dfll_fcpu_of_match,
|
|
.pm = &tegra124_dfll_pm_ops,
|
|
},
|
|
};
|
|
|
|
static int __init tegra124_dfll_fcpu_init(void)
|
|
{
|
|
return platform_driver_register(&tegra124_dfll_fcpu_driver);
|
|
}
|
|
module_init(tegra124_dfll_fcpu_init);
|
|
|
|
static void __exit tegra124_dfll_fcpu_exit(void)
|
|
{
|
|
platform_driver_unregister(&tegra124_dfll_fcpu_driver);
|
|
}
|
|
module_exit(tegra124_dfll_fcpu_exit);
|
|
|
|
MODULE_DESCRIPTION("Tegra124 DFLL clock source driver");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_AUTHOR("Aleksandr Frid <afrid@nvidia.com>");
|
|
MODULE_AUTHOR("Paul Walmsley <pwalmsley@nvidia.com>");
|