306 строки
7.3 KiB
C
306 строки
7.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
//
|
|
// Copyright 2016 Freescale Semiconductor, Inc.
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/err.h>
|
|
#include <linux/io.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/thermal.h>
|
|
|
|
#include "thermal_core.h"
|
|
|
|
#define SITES_MAX 16
|
|
|
|
/*
|
|
* QorIQ TMU Registers
|
|
*/
|
|
struct qoriq_tmu_site_regs {
|
|
u32 tritsr; /* Immediate Temperature Site Register */
|
|
u32 tratsr; /* Average Temperature Site Register */
|
|
u8 res0[0x8];
|
|
};
|
|
|
|
struct qoriq_tmu_regs {
|
|
u32 tmr; /* Mode Register */
|
|
#define TMR_DISABLE 0x0
|
|
#define TMR_ME 0x80000000
|
|
#define TMR_ALPF 0x0c000000
|
|
u32 tsr; /* Status Register */
|
|
u32 tmtmir; /* Temperature measurement interval Register */
|
|
#define TMTMIR_DEFAULT 0x0000000f
|
|
u8 res0[0x14];
|
|
u32 tier; /* Interrupt Enable Register */
|
|
#define TIER_DISABLE 0x0
|
|
u32 tidr; /* Interrupt Detect Register */
|
|
u32 tiscr; /* Interrupt Site Capture Register */
|
|
u32 ticscr; /* Interrupt Critical Site Capture Register */
|
|
u8 res1[0x10];
|
|
u32 tmhtcrh; /* High Temperature Capture Register */
|
|
u32 tmhtcrl; /* Low Temperature Capture Register */
|
|
u8 res2[0x8];
|
|
u32 tmhtitr; /* High Temperature Immediate Threshold */
|
|
u32 tmhtatr; /* High Temperature Average Threshold */
|
|
u32 tmhtactr; /* High Temperature Average Crit Threshold */
|
|
u8 res3[0x24];
|
|
u32 ttcfgr; /* Temperature Configuration Register */
|
|
u32 tscfgr; /* Sensor Configuration Register */
|
|
u8 res4[0x78];
|
|
struct qoriq_tmu_site_regs site[SITES_MAX];
|
|
u8 res5[0x9f8];
|
|
u32 ipbrr0; /* IP Block Revision Register 0 */
|
|
u32 ipbrr1; /* IP Block Revision Register 1 */
|
|
u8 res6[0x310];
|
|
u32 ttr0cr; /* Temperature Range 0 Control Register */
|
|
u32 ttr1cr; /* Temperature Range 1 Control Register */
|
|
u32 ttr2cr; /* Temperature Range 2 Control Register */
|
|
u32 ttr3cr; /* Temperature Range 3 Control Register */
|
|
};
|
|
|
|
struct qoriq_tmu_data;
|
|
|
|
/*
|
|
* Thermal zone data
|
|
*/
|
|
struct qoriq_sensor {
|
|
struct thermal_zone_device *tzd;
|
|
struct qoriq_tmu_data *qdata;
|
|
int id;
|
|
};
|
|
|
|
struct qoriq_tmu_data {
|
|
struct qoriq_tmu_regs __iomem *regs;
|
|
bool little_endian;
|
|
struct qoriq_sensor *sensor[SITES_MAX];
|
|
};
|
|
|
|
static void tmu_write(struct qoriq_tmu_data *p, u32 val, void __iomem *addr)
|
|
{
|
|
if (p->little_endian)
|
|
iowrite32(val, addr);
|
|
else
|
|
iowrite32be(val, addr);
|
|
}
|
|
|
|
static u32 tmu_read(struct qoriq_tmu_data *p, void __iomem *addr)
|
|
{
|
|
if (p->little_endian)
|
|
return ioread32(addr);
|
|
else
|
|
return ioread32be(addr);
|
|
}
|
|
|
|
static int tmu_get_temp(void *p, int *temp)
|
|
{
|
|
struct qoriq_sensor *qsensor = p;
|
|
struct qoriq_tmu_data *qdata = qsensor->qdata;
|
|
u32 val;
|
|
|
|
val = tmu_read(qdata, &qdata->regs->site[qsensor->id].tritsr);
|
|
*temp = (val & 0xff) * 1000;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct thermal_zone_of_device_ops tmu_tz_ops = {
|
|
.get_temp = tmu_get_temp,
|
|
};
|
|
|
|
static int qoriq_tmu_register_tmu_zone(struct platform_device *pdev)
|
|
{
|
|
struct qoriq_tmu_data *qdata = platform_get_drvdata(pdev);
|
|
int id, sites = 0;
|
|
|
|
for (id = 0; id < SITES_MAX; id++) {
|
|
qdata->sensor[id] = devm_kzalloc(&pdev->dev,
|
|
sizeof(struct qoriq_sensor), GFP_KERNEL);
|
|
if (!qdata->sensor[id])
|
|
return -ENOMEM;
|
|
|
|
qdata->sensor[id]->id = id;
|
|
qdata->sensor[id]->qdata = qdata;
|
|
qdata->sensor[id]->tzd = devm_thermal_zone_of_sensor_register(
|
|
&pdev->dev, id, qdata->sensor[id], &tmu_tz_ops);
|
|
if (IS_ERR(qdata->sensor[id]->tzd)) {
|
|
if (PTR_ERR(qdata->sensor[id]->tzd) == -ENODEV)
|
|
continue;
|
|
else
|
|
return PTR_ERR(qdata->sensor[id]->tzd);
|
|
}
|
|
|
|
sites |= 0x1 << (15 - id);
|
|
}
|
|
|
|
/* Enable monitoring */
|
|
if (sites != 0)
|
|
tmu_write(qdata, sites | TMR_ME | TMR_ALPF, &qdata->regs->tmr);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int qoriq_tmu_calibration(struct platform_device *pdev)
|
|
{
|
|
int i, val, len;
|
|
u32 range[4];
|
|
const u32 *calibration;
|
|
struct device_node *np = pdev->dev.of_node;
|
|
struct qoriq_tmu_data *data = platform_get_drvdata(pdev);
|
|
|
|
if (of_property_read_u32_array(np, "fsl,tmu-range", range, 4)) {
|
|
dev_err(&pdev->dev, "missing calibration range.\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* Init temperature range registers */
|
|
tmu_write(data, range[0], &data->regs->ttr0cr);
|
|
tmu_write(data, range[1], &data->regs->ttr1cr);
|
|
tmu_write(data, range[2], &data->regs->ttr2cr);
|
|
tmu_write(data, range[3], &data->regs->ttr3cr);
|
|
|
|
calibration = of_get_property(np, "fsl,tmu-calibration", &len);
|
|
if (calibration == NULL || len % 8) {
|
|
dev_err(&pdev->dev, "invalid calibration data.\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
for (i = 0; i < len; i += 8, calibration += 2) {
|
|
val = of_read_number(calibration, 1);
|
|
tmu_write(data, val, &data->regs->ttcfgr);
|
|
val = of_read_number(calibration + 1, 1);
|
|
tmu_write(data, val, &data->regs->tscfgr);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void qoriq_tmu_init_device(struct qoriq_tmu_data *data)
|
|
{
|
|
/* Disable interrupt, using polling instead */
|
|
tmu_write(data, TIER_DISABLE, &data->regs->tier);
|
|
|
|
/* Set update_interval */
|
|
tmu_write(data, TMTMIR_DEFAULT, &data->regs->tmtmir);
|
|
|
|
/* Disable monitoring */
|
|
tmu_write(data, TMR_DISABLE, &data->regs->tmr);
|
|
}
|
|
|
|
static int qoriq_tmu_probe(struct platform_device *pdev)
|
|
{
|
|
int ret;
|
|
struct qoriq_tmu_data *data;
|
|
struct device_node *np = pdev->dev.of_node;
|
|
|
|
if (!np) {
|
|
dev_err(&pdev->dev, "Device OF-Node is NULL");
|
|
return -ENODEV;
|
|
}
|
|
|
|
data = devm_kzalloc(&pdev->dev, sizeof(struct qoriq_tmu_data),
|
|
GFP_KERNEL);
|
|
if (!data)
|
|
return -ENOMEM;
|
|
|
|
platform_set_drvdata(pdev, data);
|
|
|
|
data->little_endian = of_property_read_bool(np, "little-endian");
|
|
|
|
data->regs = of_iomap(np, 0);
|
|
if (!data->regs) {
|
|
dev_err(&pdev->dev, "Failed to get memory region\n");
|
|
ret = -ENODEV;
|
|
goto err_iomap;
|
|
}
|
|
|
|
qoriq_tmu_init_device(data); /* TMU initialization */
|
|
|
|
ret = qoriq_tmu_calibration(pdev); /* TMU calibration */
|
|
if (ret < 0)
|
|
goto err_tmu;
|
|
|
|
ret = qoriq_tmu_register_tmu_zone(pdev);
|
|
if (ret < 0) {
|
|
dev_err(&pdev->dev, "Failed to register sensors\n");
|
|
ret = -ENODEV;
|
|
goto err_iomap;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_tmu:
|
|
iounmap(data->regs);
|
|
|
|
err_iomap:
|
|
platform_set_drvdata(pdev, NULL);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int qoriq_tmu_remove(struct platform_device *pdev)
|
|
{
|
|
struct qoriq_tmu_data *data = platform_get_drvdata(pdev);
|
|
|
|
/* Disable monitoring */
|
|
tmu_write(data, TMR_DISABLE, &data->regs->tmr);
|
|
|
|
iounmap(data->regs);
|
|
platform_set_drvdata(pdev, NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int qoriq_tmu_suspend(struct device *dev)
|
|
{
|
|
u32 tmr;
|
|
struct qoriq_tmu_data *data = dev_get_drvdata(dev);
|
|
|
|
/* Disable monitoring */
|
|
tmr = tmu_read(data, &data->regs->tmr);
|
|
tmr &= ~TMR_ME;
|
|
tmu_write(data, tmr, &data->regs->tmr);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int qoriq_tmu_resume(struct device *dev)
|
|
{
|
|
u32 tmr;
|
|
struct qoriq_tmu_data *data = dev_get_drvdata(dev);
|
|
|
|
/* Enable monitoring */
|
|
tmr = tmu_read(data, &data->regs->tmr);
|
|
tmr |= TMR_ME;
|
|
tmu_write(data, tmr, &data->regs->tmr);
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static SIMPLE_DEV_PM_OPS(qoriq_tmu_pm_ops,
|
|
qoriq_tmu_suspend, qoriq_tmu_resume);
|
|
|
|
static const struct of_device_id qoriq_tmu_match[] = {
|
|
{ .compatible = "fsl,qoriq-tmu", },
|
|
{ .compatible = "fsl,imx8mq-tmu", },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, qoriq_tmu_match);
|
|
|
|
static struct platform_driver qoriq_tmu = {
|
|
.driver = {
|
|
.name = "qoriq_thermal",
|
|
.pm = &qoriq_tmu_pm_ops,
|
|
.of_match_table = qoriq_tmu_match,
|
|
},
|
|
.probe = qoriq_tmu_probe,
|
|
.remove = qoriq_tmu_remove,
|
|
};
|
|
module_platform_driver(qoriq_tmu);
|
|
|
|
MODULE_AUTHOR("Jia Hongtao <hongtao.jia@nxp.com>");
|
|
MODULE_DESCRIPTION("QorIQ Thermal Monitoring Unit driver");
|
|
MODULE_LICENSE("GPL v2");
|