openwrt/upstream - upstream openwrt

diff options

Diffstat (limited to 'target/linux/ar71xx/patches-2.6.35/206-nxp-74hc153-gpio-chip-driver.patch')

-rw-r--r--

target/linux/ar71xx/patches-2.6.35/206-nxp-74hc153-gpio-chip-driver.patch

1 files changed, 25 insertions, 0 deletions

--- a/drivers/hwmon/Makefile +++ b/drivers/hwmon/Makefile @@ -107,6 +107,7 @@ 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 @@ -753,6 +753,14 @@ 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");


context:
space:
mode: