openwrtv3/target/linux/lantiq/patches-4.9/0302-xrx200-add-sensors-driver.patch
Hauke Mehrtens 863e79f8d5 lantiq: add support for kernel 4.9
The following patches were dropped because they are already applied
upstream:
0012-pinctrl-lantiq-fix-up-pinmux.patch
0013-MTD-lantiq-xway-fix-invalid-operator.patch
0014-MTD-lantiq-xway-the-latched-command-should-be-persis.patch
0015-MTD-lantiq-xway-remove-endless-loop.patch
0016-MTD-lantiq-xway-add-missing-write_buf-and-read_buf-t.patch
0017-MTD-xway-fix-nand-locking.patch
0044-pinctrl-lantiq-introduce-new-dedicated-devicetree-bi.patch
0045-pinctrl-lantiq-Fix-GPIO-Setup-of-GPIO-Port3.patch
0046-pinctrl-lantiq-2-pins-have-the-wrong-mux-list.patch
0047-irq-fixes.patch
0047-mtd-plat-nand-pass-of-node.patch
0060-usb-dwc2-Add-support-for-Lantiq-ARX-and-XRX-SoCs.patch
0120-MIPS-lantiq-add-support-for-device-tree-file-from-bo.patch
0121-MIPS-lantiq-make-it-possible-to-build-in-no-device-t.patch
122-MIPS-store-the-appended-dtb-address-in-a-variable.patch

The PHY driver was reduced to the code adding the LED configuration,
the rest is already upstream:
0023-NET-PHY-adds-driver-for-lantiq-PHY11G.patch

The SPI driver was replaced with the version pending for upstream
inclusion:
New driver:
0090-spi-add-transfer_status-callback.patch
0091-spi-lantiq-ssc-add-support-for-Lantiq-SSC-SPI-controller.patch
Old driver:
0100-spi-add-support-for-Lantiq-SPI-controller.patch

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
2017-02-11 23:44:13 +01:00

184 lines
4.7 KiB
Diff

--- 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");