On Thu, Mar 28, 2019 at 01:09:37PM +0000, Charles Keepax wrote:
> From: Lucas Tanure <tanureal@xxxxxxxxxxxxxxxxxxxxx>
>
> Lochnagar is an evaluation and development board for Cirrus
> Logic Smart CODEC and Amp devices. It allows the connection of
> most Cirrus Logic devices on mini-cards, as well as allowing
> connection of various application processor systems to provide a
> full evaluation platform.
>
> This driver adds support for the hardware monitoring features of
> the Lochnagar 2 to the hwmon API. Monitoring is provided for
> the board voltages, currents and temperature supported by the
> board controller chip.
>
> Signed-off-by: Lucas Tanure <tanureal@xxxxxxxxxxxxxxxxxxxxx>
> Signed-off-by: Charles Keepax <ckeepax@xxxxxxxxxxxxxxxxxxxxx>
Applied to hwmon-next.
Thanks,
Guenter
> ---
>
> Changes since v3:
> - Add defines for the precision of each measurement
> - Change to storing number of samples for averaging not time
> - Use DIV_ROUND_CLOSEST_ULL
>
> Thanks,
> Charles
>
> Documentation/hwmon/lochnagar | 80 ++++++++
> MAINTAINERS | 3 +
> drivers/hwmon/Kconfig | 10 +
> drivers/hwmon/Makefile | 1 +
> drivers/hwmon/lochnagar-hwmon.c | 412 ++++++++++++++++++++++++++++++++++++++++
> 5 files changed, 506 insertions(+)
> create mode 100644 Documentation/hwmon/lochnagar
> create mode 100644 drivers/hwmon/lochnagar-hwmon.c
>
> diff --git a/Documentation/hwmon/lochnagar b/Documentation/hwmon/lochnagar
> new file mode 100644
> index 0000000000000..e9686fb3eb405
> --- /dev/null
> +++ b/Documentation/hwmon/lochnagar
> @@ -0,0 +1,80 @@
> +Kernel Driver Lochnagar
> +========================
> +
> +Supported systems:
> + * Cirrus Logic : Lochnagar 2
> +
> +Author: Lucas A. Tanure Alves
> +
> +Description
> +-----------
> +
> +Lochnagar 2 features built-in Current Monitor circuitry that allows for the
> +measurement of both voltage and current on up to eight of the supply voltage
> +rails provided to the minicards. The Current Monitor does not require any
> +hardware modifications or external circuitry to operate.
> +
> +The current and voltage measurements are obtained through the standard register
> +map interface to the Lochnagar board controller, and can therefore be monitored
> +by software.
> +
> +Sysfs attributes
> +----------------
> +
> +temp1_input The Lochnagar board temperature (milliCelsius)
> +in0_input Measured voltage for DBVDD1 (milliVolts)
> +in0_label "DBVDD1"
> +curr1_input Measured current for DBVDD1 (milliAmps)
> +curr1_label "DBVDD1"
> +power1_average Measured average power for DBVDD1 (microWatts)
> +power1_average_interval Power averaging time input valid from 1 to 1708mS
> +power1_label "DBVDD1"
> +in1_input Measured voltage for 1V8 DSP (milliVolts)
> +in1_label "1V8 DSP"
> +curr2_input Measured current for 1V8 DSP (milliAmps)
> +curr2_label "1V8 DSP"
> +power2_average Measured average power for 1V8 DSP (microWatts)
> +power2_average_interval Power averaging time input valid from 1 to 1708mS
> +power2_label "1V8 DSP"
> +in2_input Measured voltage for 1V8 CDC (milliVolts)
> +in2_label "1V8 CDC"
> +curr3_input Measured current for 1V8 CDC (milliAmps)
> +curr3_label "1V8 CDC"
> +power3_average Measured average power for 1V8 CDC (microWatts)
> +power3_average_interval Power averaging time input valid from 1 to 1708mS
> +power3_label "1V8 CDC"
> +in3_input Measured voltage for VDDCORE DSP (milliVolts)
> +in3_label "VDDCORE DSP"
> +curr4_input Measured current for VDDCORE DSP (milliAmps)
> +curr4_label "VDDCORE DSP"
> +power4_average Measured average power for VDDCORE DSP (microWatts)
> +power4_average_interval Power averaging time input valid from 1 to 1708mS
> +power4_label "VDDCORE DSP"
> +in4_input Measured voltage for AVDD 1V8 (milliVolts)
> +in4_label "AVDD 1V8"
> +curr5_input Measured current for AVDD 1V8 (milliAmps)
> +curr5_label "AVDD 1V8"
> +power5_average Measured average power for AVDD 1V8 (microWatts)
> +power5_average_interval Power averaging time input valid from 1 to 1708mS
> +power5_label "AVDD 1V8"
> +curr6_input Measured current for SYSVDD (milliAmps)
> +curr6_label "SYSVDD"
> +power6_average Measured average power for SYSVDD (microWatts)
> +power6_average_interval Power averaging time input valid from 1 to 1708mS
> +power6_label "SYSVDD"
> +in6_input Measured voltage for VDDCORE CDC (milliVolts)
> +in6_label "VDDCORE CDC"
> +curr7_input Measured current for VDDCORE CDC (milliAmps)
> +curr7_label "VDDCORE CDC"
> +power7_average Measured average power for VDDCORE CDC (microWatts)
> +power7_average_interval Power averaging time input valid from 1 to 1708mS
> +power7_label "VDDCORE CDC"
> +in7_input Measured voltage for MICVDD (milliVolts)
> +in7_label "MICVDD"
> +curr8_input Measured current for MICVDD (milliAmps)
> +curr8_label "MICVDD"
> +power8_average Measured average power for MICVDD (microWatts)
> +power8_average_interval Power averaging time input valid from 1 to 1708mS
> +power8_label "MICVDD"
> +
> +Note: It is not possible to measure voltage on the SYSVDD rail.
> diff --git a/MAINTAINERS b/MAINTAINERS
> index e17ebf70b5480..4cd3c281d8b56 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -3796,6 +3796,7 @@ M: Richard Fitzgerald <rf@xxxxxxxxxxxxxxxxxxxxx>
> L: patches@xxxxxxxxxxxxxxxxxxxxx
> S: Supported
> F: drivers/clk/clk-lochnagar.c
> +F: drivers/hwmon/lochnagar-hwmon.c
> F: drivers/mfd/lochnagar-i2c.c
> F: drivers/pinctrl/cirrus/pinctrl-lochnagar.c
> F: drivers/regulator/lochnagar-regulator.c
> @@ -3804,8 +3805,10 @@ F: include/dt-bindings/pinctrl/lochnagar.h
> F: include/linux/mfd/lochnagar*
> F: Documentation/devicetree/bindings/mfd/cirrus,lochnagar.txt
> F: Documentation/devicetree/bindings/clock/cirrus,lochnagar.txt
> +F: Documentation/devicetree/bindings/hwmon/cirrus,lochnagar.txt
> F: Documentation/devicetree/bindings/pinctrl/cirrus,lochnagar.txt
> F: Documentation/devicetree/bindings/regulator/cirrus,lochnagar.txt
> +F: Documentation/hwmon/lochnagar
>
> CISCO FCOE HBA DRIVER
> M: Satish Kharat <satishkh@xxxxxxxxx>
> diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
> index d0f1dfe2bcbbd..dedd5febd3aa6 100644
> --- a/drivers/hwmon/Kconfig
> +++ b/drivers/hwmon/Kconfig
> @@ -705,6 +705,16 @@ config SENSORS_LINEAGE
> This driver can also be built as a module. If so, the module
> will be called lineage-pem.
>
> +config SENSORS_LOCHNAGAR
> + tristate "Lochnagar Hardware Monitor"
> + depends on MFD_LOCHNAGAR
> + help
> + If you say yes here you get support for Lochnagar 2 temperature,
> + voltage and current sensors abilities.
> +
> + This driver can also be built as a module. If so, the module
> + will be called lochnagar-hwmon.
> +
> config SENSORS_LTC2945
> tristate "Linear Technology LTC2945"
> depends on I2C
> diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
> index f5c7b442e69e5..8db472ea04f00 100644
> --- a/drivers/hwmon/Makefile
> +++ b/drivers/hwmon/Makefile
> @@ -89,6 +89,7 @@ obj-$(CONFIG_SENSORS_JZ4740) += jz4740-hwmon.o
> obj-$(CONFIG_SENSORS_K8TEMP) += k8temp.o
> obj-$(CONFIG_SENSORS_K10TEMP) += k10temp.o
> obj-$(CONFIG_SENSORS_LINEAGE) += lineage-pem.o
> +obj-$(CONFIG_SENSORS_LOCHNAGAR) += lochnagar-hwmon.o
> obj-$(CONFIG_SENSORS_LM63) += lm63.o
> obj-$(CONFIG_SENSORS_LM70) += lm70.o
> obj-$(CONFIG_SENSORS_LM73) += lm73.o
> diff --git a/drivers/hwmon/lochnagar-hwmon.c b/drivers/hwmon/lochnagar-hwmon.c
> new file mode 100644
> index 0000000000000..8b19adf2eeb07
> --- /dev/null
> +++ b/drivers/hwmon/lochnagar-hwmon.c
> @@ -0,0 +1,412 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Lochnagar hardware monitoring features
> + *
> + * Copyright (c) 2016-2019 Cirrus Logic, Inc. and
> + * Cirrus Logic International Semiconductor Ltd.
> + *
> + * Author: Lucas Tanure <tanureal@xxxxxxxxxxxxxxxxxxxxx>
> + */
> +
> +#include <linux/delay.h>
> +#include <linux/hwmon.h>
> +#include <linux/hwmon-sysfs.h>
> +#include <linux/i2c.h>
> +#include <linux/math64.h>
> +#include <linux/mfd/lochnagar.h>
> +#include <linux/mfd/lochnagar2_regs.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/of_device.h>
> +#include <linux/platform_device.h>
> +#include <linux/regmap.h>
> +
> +#define LN2_MAX_NSAMPLE 1023
> +#define LN2_SAMPLE_US 1670
> +
> +#define LN2_CURR_UNITS 1000
> +#define LN2_VOLT_UNITS 1000
> +#define LN2_TEMP_UNITS 1000
> +#define LN2_PWR_UNITS 1000000
> +
> +static const char * const lochnagar_chan_names[] = {
> + "DBVDD1",
> + "1V8 DSP",
> + "1V8 CDC",
> + "VDDCORE DSP",
> + "AVDD 1V8",
> + "SYSVDD",
> + "VDDCORE CDC",
> + "MICVDD",
> +};
> +
> +struct lochnagar_hwmon {
> + struct regmap *regmap;
> +
> + long power_nsamples[ARRAY_SIZE(lochnagar_chan_names)];
> +
> + /* Lock to ensure only a single sensor is read at a time */
> + struct mutex sensor_lock;
> +};
> +
> +enum lochnagar_measure_mode {
> + LN2_CURR = 0,
> + LN2_VOLT,
> + LN2_TEMP,
> +};
> +
> +/**
> + * float_to_long - Convert ieee754 reading from hardware to an integer
> + *
> + * @data: Value read from the hardware
> + * @precision: Units to multiply up to eg. 1000 = milli, 1000000 = micro
> + *
> + * Return: Converted integer reading
> + *
> + * Depending on the measurement type the hardware returns an ieee754
> + * floating point value in either volts, amps or celsius. This function
> + * will convert that into an integer in a smaller unit such as micro-amps
> + * or milli-celsius. The hardware does not return NaN, so consideration of
> + * that is not required.
> + */
> +static long float_to_long(u32 data, u32 precision)
> +{
> + u64 man = data & 0x007FFFFF;
> + int exp = ((data & 0x7F800000) >> 23) - 127 - 23;
> + bool negative = data & 0x80000000;
> + long result;
> +
> + man = (man + (1 << 23)) * precision;
> +
> + if (fls64(man) + exp > (int)sizeof(long) * 8 - 1)
> + result = LONG_MAX;
> + else if (exp < 0)
> + result = (man + (1ull << (-exp - 1))) >> -exp;
> + else
> + result = man << exp;
> +
> + return negative ? -result : result;
> +}
> +
> +static int do_measurement(struct regmap *regmap, int chan,
> + enum lochnagar_measure_mode mode, int nsamples)
> +{
> + unsigned int val;
> + int ret;
> +
> + chan = 1 << (chan + LOCHNAGAR2_IMON_MEASURED_CHANNELS_SHIFT);
> +
> + ret = regmap_write(regmap, LOCHNAGAR2_IMON_CTRL1,
> + LOCHNAGAR2_IMON_ENA_MASK | chan | mode);
> + if (ret < 0)
> + return ret;
> +
> + ret = regmap_write(regmap, LOCHNAGAR2_IMON_CTRL2, nsamples);
> + if (ret < 0)
> + return ret;
> +
> + ret = regmap_write(regmap, LOCHNAGAR2_IMON_CTRL3,
> + LOCHNAGAR2_IMON_CONFIGURE_MASK);
> + if (ret < 0)
> + return ret;
> +
> + ret = regmap_read_poll_timeout(regmap, LOCHNAGAR2_IMON_CTRL3, val,
> + val & LOCHNAGAR2_IMON_DONE_MASK,
> + 1000, 10000);
> + if (ret < 0)
> + return ret;
> +
> + ret = regmap_write(regmap, LOCHNAGAR2_IMON_CTRL3,
> + LOCHNAGAR2_IMON_MEASURE_MASK);
> + if (ret < 0)
> + return ret;
> +
> + /*
> + * Actual measurement time is ~1.67mS per sample, approximate this
> + * with a 1.5mS per sample msleep and then poll for success up to
> + * ~0.17mS * 1023 (LN2_MAX_NSAMPLES). Normally for smaller values
> + * of nsamples the poll will complete on the first loop due to
> + * other latency in the system.
> + */
> + msleep((nsamples * 3) / 2);
> +
> + ret = regmap_read_poll_timeout(regmap, LOCHNAGAR2_IMON_CTRL3, val,
> + val & LOCHNAGAR2_IMON_DONE_MASK,
> + 5000, 200000);
> + if (ret < 0)
> + return ret;
> +
> + return regmap_write(regmap, LOCHNAGAR2_IMON_CTRL3, 0);
> +}
> +
> +static int request_data(struct regmap *regmap, int chan, u32 *data)
> +{
> + unsigned int val;
> + int ret;
> +
> + ret = regmap_write(regmap, LOCHNAGAR2_IMON_CTRL4,
> + LOCHNAGAR2_IMON_DATA_REQ_MASK |
> + chan << LOCHNAGAR2_IMON_CH_SEL_SHIFT);
> + if (ret < 0)
> + return ret;
> +
> + ret = regmap_read_poll_timeout(regmap, LOCHNAGAR2_IMON_CTRL4, val,
> + val & LOCHNAGAR2_IMON_DATA_RDY_MASK,
> + 1000, 10000);
> + if (ret < 0)
> + return ret;
> +
> + ret = regmap_read(regmap, LOCHNAGAR2_IMON_DATA1, &val);
> + if (ret < 0)
> + return ret;
> +
> + *data = val << 16;
> +
> + ret = regmap_read(regmap, LOCHNAGAR2_IMON_DATA2, &val);
> + if (ret < 0)
> + return ret;
> +
> + *data |= val;
> +
> + return regmap_write(regmap, LOCHNAGAR2_IMON_CTRL4, 0);
> +}
> +
> +static int read_sensor(struct device *dev, int chan,
> + enum lochnagar_measure_mode mode, int nsamples,
> + unsigned int precision, long *val)
> +{
> + struct lochnagar_hwmon *priv = dev_get_drvdata(dev);
> + struct regmap *regmap = priv->regmap;
> + u32 data;
> + int ret;
> +
> + mutex_lock(&priv->sensor_lock);
> +
> + ret = do_measurement(regmap, chan, mode, nsamples);
> + if (ret < 0) {
> + dev_err(dev, "Failed to perform measurement: %d\n", ret);
> + goto error;
> + }
> +
> + ret = request_data(regmap, chan, &data);
> + if (ret < 0) {
> + dev_err(dev, "Failed to read measurement: %d\n", ret);
> + goto error;
> + }
> +
> + *val = float_to_long(data, precision);
> +
> +error:
> + mutex_unlock(&priv->sensor_lock);
> +
> + return ret;
> +}
> +
> +static int read_power(struct device *dev, int chan, long *val)
> +{
> + struct lochnagar_hwmon *priv = dev_get_drvdata(dev);
> + int nsamples = priv->power_nsamples[chan];
> + u64 power;
> + int ret;
> +
> + if (!strcmp("SYSVDD", lochnagar_chan_names[chan])) {
> + power = 5 * LN2_PWR_UNITS;
> + } else {
> + ret = read_sensor(dev, chan, LN2_VOLT, 1, LN2_PWR_UNITS, val);
> + if (ret < 0)
> + return ret;
> +
> + power = abs(*val);
> + }
> +
> + ret = read_sensor(dev, chan, LN2_CURR, nsamples, LN2_PWR_UNITS, val);
> + if (ret < 0)
> + return ret;
> +
> + power *= abs(*val);
> + power = DIV_ROUND_CLOSEST_ULL(power, LN2_PWR_UNITS);
> +
> + if (power > LONG_MAX)
> + *val = LONG_MAX;
> + else
> + *val = power;
> +
> + return 0;
> +}
> +
> +static umode_t lochnagar_is_visible(const void *drvdata,
> + enum hwmon_sensor_types type,
> + u32 attr, int chan)
> +{
> + switch (type) {
> + case hwmon_in:
> + if (!strcmp("SYSVDD", lochnagar_chan_names[chan]))
> + return 0;
> + break;
> + case hwmon_power:
> + if (attr == hwmon_power_average_interval)
> + return 0644;
> + break;
> + default:
> + break;
> + }
> +
> + return 0444;
> +}
> +
> +static int lochnagar_read(struct device *dev, enum hwmon_sensor_types type,
> + u32 attr, int chan, long *val)
> +{
> + struct lochnagar_hwmon *priv = dev_get_drvdata(dev);
> + int interval;
> +
> + switch (type) {
> + case hwmon_in:
> + return read_sensor(dev, chan, LN2_VOLT, 1, LN2_VOLT_UNITS, val);
> + case hwmon_curr:
> + return read_sensor(dev, chan, LN2_CURR, 1, LN2_CURR_UNITS, val);
> + case hwmon_temp:
> + return read_sensor(dev, chan, LN2_TEMP, 1, LN2_TEMP_UNITS, val);
> + case hwmon_power:
> + switch (attr) {
> + case hwmon_power_average:
> + return read_power(dev, chan, val);
> + case hwmon_power_average_interval:
> + interval = priv->power_nsamples[chan] * LN2_SAMPLE_US;
> + *val = DIV_ROUND_CLOSEST(interval, 1000);
> + return 0;
> + default:
> + return -EOPNOTSUPP;
> + }
> + default:
> + return -EOPNOTSUPP;
> + }
> +}
> +
> +static int lochnagar_read_string(struct device *dev,
> + enum hwmon_sensor_types type, u32 attr,
> + int chan, const char **str)
> +{
> + switch (type) {
> + case hwmon_in:
> + case hwmon_curr:
> + case hwmon_power:
> + *str = lochnagar_chan_names[chan];
> + return 0;
> + default:
> + return -EOPNOTSUPP;
> + }
> +}
> +
> +static int lochnagar_write(struct device *dev, enum hwmon_sensor_types type,
> + u32 attr, int chan, long val)
> +{
> + struct lochnagar_hwmon *priv = dev_get_drvdata(dev);
> +
> + if (type != hwmon_power || attr != hwmon_power_average_interval)
> + return -EOPNOTSUPP;
> +
> + val = clamp_t(long, val, 1, (LN2_MAX_NSAMPLE * LN2_SAMPLE_US) / 1000);
> + val = DIV_ROUND_CLOSEST(val * 1000, LN2_SAMPLE_US);
> +
> + priv->power_nsamples[chan] = val;
> +
> + return 0;
> +}
> +
> +static const struct hwmon_ops lochnagar_ops = {
> + .is_visible = lochnagar_is_visible,
> + .read = lochnagar_read,
> + .read_string = lochnagar_read_string,
> + .write = lochnagar_write,
> +};
> +
> +static const struct hwmon_channel_info *lochnagar_info[] = {
> + HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT),
> + HWMON_CHANNEL_INFO(in, HWMON_I_INPUT | HWMON_I_LABEL,
> + HWMON_I_INPUT | HWMON_I_LABEL,
> + HWMON_I_INPUT | HWMON_I_LABEL,
> + HWMON_I_INPUT | HWMON_I_LABEL,
> + HWMON_I_INPUT | HWMON_I_LABEL,
> + HWMON_I_INPUT | HWMON_I_LABEL,
> + HWMON_I_INPUT | HWMON_I_LABEL,
> + HWMON_I_INPUT | HWMON_I_LABEL),
> + HWMON_CHANNEL_INFO(curr, HWMON_C_INPUT | HWMON_C_LABEL,
> + HWMON_C_INPUT | HWMON_C_LABEL,
> + HWMON_C_INPUT | HWMON_C_LABEL,
> + HWMON_C_INPUT | HWMON_C_LABEL,
> + HWMON_C_INPUT | HWMON_C_LABEL,
> + HWMON_C_INPUT | HWMON_C_LABEL,
> + HWMON_C_INPUT | HWMON_C_LABEL,
> + HWMON_C_INPUT | HWMON_C_LABEL),
> + HWMON_CHANNEL_INFO(power, HWMON_P_AVERAGE | HWMON_P_AVERAGE_INTERVAL |
> + HWMON_P_LABEL,
> + HWMON_P_AVERAGE | HWMON_P_AVERAGE_INTERVAL |
> + HWMON_P_LABEL,
> + HWMON_P_AVERAGE | HWMON_P_AVERAGE_INTERVAL |
> + HWMON_P_LABEL,
> + HWMON_P_AVERAGE | HWMON_P_AVERAGE_INTERVAL |
> + HWMON_P_LABEL,
> + HWMON_P_AVERAGE | HWMON_P_AVERAGE_INTERVAL |
> + HWMON_P_LABEL,
> + HWMON_P_AVERAGE | HWMON_P_AVERAGE_INTERVAL |
> + HWMON_P_LABEL,
> + HWMON_P_AVERAGE | HWMON_P_AVERAGE_INTERVAL |
> + HWMON_P_LABEL,
> + HWMON_P_AVERAGE | HWMON_P_AVERAGE_INTERVAL |
> + HWMON_P_LABEL),
> + NULL
> +};
> +
> +static const struct hwmon_chip_info lochnagar_chip_info = {
> + .ops = &lochnagar_ops,
> + .info = lochnagar_info,
> +};
> +
> +static const struct of_device_id lochnagar_of_match[] = {
> + { .compatible = "cirrus,lochnagar2-hwmon" },
> + {}
> +};
> +MODULE_DEVICE_TABLE(of, lochnagar_of_match);
> +
> +static int lochnagar_hwmon_probe(struct platform_device *pdev)
> +{
> + struct device *dev = &pdev->dev;
> + struct device *hwmon_dev;
> + struct lochnagar_hwmon *priv;
> + int i;
> +
> + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
> + if (!priv)
> + return -ENOMEM;
> +
> + mutex_init(&priv->sensor_lock);
> +
> + priv->regmap = dev_get_regmap(dev->parent, NULL);
> + if (!priv->regmap) {
> + dev_err(dev, "No register map found\n");
> + return -EINVAL;
> + }
> +
> + for (i = 0; i < ARRAY_SIZE(priv->power_nsamples); i++)
> + priv->power_nsamples[i] = 96;
> +
> + hwmon_dev = devm_hwmon_device_register_with_info(dev, "Lochnagar", priv,
> + &lochnagar_chip_info,
> + NULL);
> +
> + return PTR_ERR_OR_ZERO(hwmon_dev);
> +}
> +
> +static struct platform_driver lochnagar_hwmon_driver = {
> + .driver = {
> + .name = "lochnagar-hwmon",
> + .of_match_table = lochnagar_of_match,
> + },
> + .probe = lochnagar_hwmon_probe,
> +};
> +module_platform_driver(lochnagar_hwmon_driver);
> +
> +MODULE_AUTHOR("Lucas Tanure <tanureal@xxxxxxxxxxxxxxxxxxxxx>");
> +MODULE_DESCRIPTION("Lochnagar hardware monitoring features");
> +MODULE_LICENSE("GPL");
