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-rw-r--r--target/linux/lantiq/patches-4.9/0302-xrx200-add-sensors-driver.patch184
1 files changed, 184 insertions, 0 deletions
diff --git a/target/linux/lantiq/patches-4.9/0302-xrx200-add-sensors-driver.patch b/target/linux/lantiq/patches-4.9/0302-xrx200-add-sensors-driver.patch
new file mode 100644
index 0000000000..7e0051e668
--- /dev/null
+++ b/target/linux/lantiq/patches-4.9/0302-xrx200-add-sensors-driver.patch
@@ -0,0 +1,184 @@
+--- a/drivers/hwmon/Makefile
++++ b/drivers/hwmon/Makefile
+@@ -109,6 +109,7 @@ obj-$(CONFIG_SENSORS_LTC4222) += ltc4222
+ obj-$(CONFIG_SENSORS_LTC4245) += ltc4245.o
+ obj-$(CONFIG_SENSORS_LTC4260) += ltc4260.o
+ obj-$(CONFIG_SENSORS_LTC4261) += ltc4261.o
++obj-$(CONFIG_SENSORS_LTQ_CPUTEMP) += ltq-cputemp.o
+ obj-$(CONFIG_SENSORS_MAX1111) += max1111.o
+ obj-$(CONFIG_SENSORS_MAX16065) += max16065.o
+ obj-$(CONFIG_SENSORS_MAX1619) += max1619.o
+--- a/drivers/hwmon/Kconfig
++++ b/drivers/hwmon/Kconfig
+@@ -780,6 +780,14 @@ config SENSORS_LTC4261
+ This driver can also be built as a module. If so, the module will
+ be called ltc4261.
+
++config SENSORS_LTQ_CPUTEMP
++ bool "Lantiq CPU temperature sensor"
++ depends on LANTIQ
++ default n
++ help
++ If you say yes here you get support for the temperature
++ sensor inside your CPU.
++
+ config SENSORS_MAX1111
+ tristate "Maxim MAX1111 Serial 8-bit ADC chip and compatibles"
+ depends on SPI_MASTER
+--- /dev/null
++++ b/drivers/hwmon/ltq-cputemp.c
+@@ -0,0 +1,154 @@
++/* Lantiq CPU Temperatur sensor driver for xrx200
++ *
++ * Copyright (C) 2016 Florian Eckert <feckert@tdt.de>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version
++ *
++ * 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
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, see <http://www.gnu.org/licenses/>
++ */
++
++#include <linux/module.h>
++#include <linux/init.h>
++#include <linux/delay.h>
++#include <linux/of_device.h>
++#include <linux/hwmon.h>
++#include <linux/hwmon-sysfs.h>
++
++#include <lantiq_soc.h>
++
++/* gphy1 configuration register contains cpu temperature */
++#define CGU_GPHY1_CR 0x0040
++#define CGU_TEMP_PD BIT(19)
++
++static void ltq_cputemp_enable(void)
++{
++ ltq_cgu_w32(ltq_cgu_r32(CGU_GPHY1_CR) | CGU_TEMP_PD, CGU_GPHY1_CR);
++
++ /* wait a short moment to let the SoC get the first temperatur value */
++ mdelay(100);
++}
++
++static void ltq_cputemp_disable(void)
++{
++ ltq_cgu_w32(ltq_cgu_r32(CGU_GPHY1_CR) & ~CGU_TEMP_PD, CGU_GPHY1_CR);
++}
++
++static int ltq_cputemp_read(void)
++{
++ int value;
++
++ /* get the temperature including one decimal place */
++ value = (ltq_cgu_r32(CGU_GPHY1_CR) >> 9) & 0x01FF;
++ value = (value << 2 ) + value;
++
++ /* range -38 to +154 °C, register value zero is -38.0 °C */
++ value -= 380;
++
++ return value;
++}
++
++static ssize_t show_cputemp(struct device *dev,
++ struct device_attribute *attr, char *buf)
++{
++ int value;
++
++ value = ltq_cputemp_read();
++ /* scale temp to millidegree */
++ value = value * 100;
++
++ return sprintf(buf, "%d\n", value);
++}
++
++static DEVICE_ATTR(temp1_input, S_IRUGO, show_cputemp, NULL);
++
++static struct attribute *ltq_cputemp_attrs[] = {
++ &dev_attr_temp1_input.attr,
++ NULL
++};
++
++ATTRIBUTE_GROUPS(ltq_cputemp);
++
++static int ltq_cputemp_probe(struct platform_device *pdev)
++{
++ int value = 0;
++ int ret;
++ struct device *hwmon_dev;
++
++ /* available on vr9 v1.2 SoCs only */
++ if (ltq_soc_type() != SOC_TYPE_VR9_2)
++ return -ENODEV;
++
++ hwmon_dev = devm_hwmon_device_register_with_groups(&pdev->dev,
++ "CPU0",
++ NULL,
++ ltq_cputemp_groups);
++
++ if (IS_ERR(hwmon_dev)) {
++ dev_err(&pdev->dev, "Failed to register as hwmon device");
++ ret = PTR_ERR(hwmon_dev);
++ goto error_hwmon;
++ }
++
++ ltq_cputemp_enable();
++ value = ltq_cputemp_read();
++ dev_info(&pdev->dev, "Current CPU die temperature: %d.%d °C", value / 10, value % 10);
++
++ return 0;
++
++error_hwmon:
++ return ret;
++}
++
++static int ltq_cputemp_release(struct platform_device *pdev)
++{
++ hwmon_device_unregister(&pdev->dev);
++ ltq_cputemp_disable();
++ return 0;
++}
++
++const struct of_device_id ltq_cputemp_match[] = {
++ { .compatible = "lantiq,cputemp" },
++ {},
++};
++MODULE_DEVICE_TABLE(of, ltq_cputemp_match);
++
++static struct platform_driver ltq_cputemp_driver = {
++ .probe = ltq_cputemp_probe,
++ .remove = ltq_cputemp_release,
++ .driver = {
++ .name = "ltq-cputemp",
++ .owner = THIS_MODULE,
++ .of_match_table = ltq_cputemp_match,
++ },
++};
++
++int __init init_ltq_cputemp(void)
++{
++ int ret;
++
++ ret = platform_driver_register(&ltq_cputemp_driver);
++ return ret;
++}
++
++void clean_ltq_cputemp(void)
++{
++ platform_driver_unregister(&ltq_cputemp_driver);
++ return;
++}
++
++module_init(init_ltq_cputemp);
++module_exit(clean_ltq_cputemp);
++
++MODULE_AUTHOR("Florian Eckert <feckert@tdt.de>");
++
++MODULE_DESCRIPTION("Lantiq Temperature Sensor");
++MODULE_LICENSE("GPL");