Release 4.12 drivers/thermal/kirkwood_thermal.c
/*
* Kirkwood thermal sensor driver
*
* Copyright (C) 2012 Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* 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/device.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/of.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/thermal.h>
#define KIRKWOOD_THERMAL_VALID_OFFSET 9
#define KIRKWOOD_THERMAL_VALID_MASK 0x1
#define KIRKWOOD_THERMAL_TEMP_OFFSET 10
#define KIRKWOOD_THERMAL_TEMP_MASK 0x1FF
/* Kirkwood Thermal Sensor Dev Structure */
struct kirkwood_thermal_priv {
void __iomem *sensor;
};
static int kirkwood_get_temp(struct thermal_zone_device *thermal,
int *temp)
{
unsigned long reg;
struct kirkwood_thermal_priv *priv = thermal->devdata;
reg = readl_relaxed(priv->sensor);
/* Valid check */
if (!((reg >> KIRKWOOD_THERMAL_VALID_OFFSET) &
KIRKWOOD_THERMAL_VALID_MASK)) {
dev_err(&thermal->device,
"Temperature sensor reading not valid\n");
return -EIO;
}
/*
* Calculate temperature. According to Marvell internal
* documentation the formula for this is:
* Celsius = (322-reg)/1.3625
*/
reg = (reg >> KIRKWOOD_THERMAL_TEMP_OFFSET) &
KIRKWOOD_THERMAL_TEMP_MASK;
*temp = ((3220000000UL - (10000000UL * reg)) / 13625);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Nobuhiro Iwamatsu | 91 | 92.86% | 1 | 25.00% |
| Ezequiel García | 6 | 6.12% | 2 | 50.00% |
| Sascha Hauer | 1 | 1.02% | 1 | 25.00% |
| Total | 98 | 100.00% | 4 | 100.00% |
static struct thermal_zone_device_ops ops = {
.get_temp = kirkwood_get_temp,
};
static const struct of_device_id kirkwood_thermal_id_table[] = {
{ .compatible = "marvell,kirkwood-thermal" },
{}
};
static int kirkwood_thermal_probe(struct platform_device *pdev)
{
struct thermal_zone_device *thermal = NULL;
struct kirkwood_thermal_priv *priv;
struct resource *res;
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
priv->sensor = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(priv->sensor))
return PTR_ERR(priv->sensor);
thermal = thermal_zone_device_register("kirkwood_thermal", 0, 0,
priv, &ops, NULL, 0, 0);
if (IS_ERR(thermal)) {
dev_err(&pdev->dev,
"Failed to register thermal zone device\n");
return PTR_ERR(thermal);
}
platform_set_drvdata(pdev, thermal);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Nobuhiro Iwamatsu | 135 | 87.66% | 1 | 33.33% |
| Wolfram Sang | 11 | 7.14% | 1 | 33.33% |
| Sachin Kamat | 8 | 5.19% | 1 | 33.33% |
| Total | 154 | 100.00% | 3 | 100.00% |
static int kirkwood_thermal_exit(struct platform_device *pdev)
{
struct thermal_zone_device *kirkwood_thermal =
platform_get_drvdata(pdev);
thermal_zone_device_unregister(kirkwood_thermal);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Nobuhiro Iwamatsu | 29 | 100.00% | 1 | 100.00% |
| Total | 29 | 100.00% | 1 | 100.00% |
MODULE_DEVICE_TABLE(of, kirkwood_thermal_id_table);
static struct platform_driver kirkwood_thermal_driver = {
.probe = kirkwood_thermal_probe,
.remove = kirkwood_thermal_exit,
.driver = {
.name = "kirkwood_thermal",
.of_match_table = kirkwood_thermal_id_table,
},
};
module_platform_driver(kirkwood_thermal_driver);
MODULE_AUTHOR("Nobuhiro Iwamatsu <iwamatsu@nigauri.org>");
MODULE_DESCRIPTION("kirkwood thermal driver");
MODULE_LICENSE("GPL");
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Nobuhiro Iwamatsu | 396 | 93.84% | 1 | 16.67% |
| Wolfram Sang | 11 | 2.61% | 1 | 16.67% |
| Sachin Kamat | 8 | 1.90% | 1 | 16.67% |
| Ezequiel García | 6 | 1.42% | 2 | 33.33% |
| Sascha Hauer | 1 | 0.24% | 1 | 16.67% |
| Total | 422 | 100.00% | 6 | 100.00% |
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