lantiq: add support for kernel 4.9

[openwrt/staging/yousong.git] / target / linux / lantiq / patches-4.9 / 0302-xrx200-add-sensors-driver.patch

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 (file)
index 0000000..7e0051e
--- /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");