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-rw-r--r--target/linux/brcm2708/patches-4.14/950-0365-Add-rpi-poe-fan-driver.patch615
1 files changed, 0 insertions, 615 deletions
diff --git a/target/linux/brcm2708/patches-4.14/950-0365-Add-rpi-poe-fan-driver.patch b/target/linux/brcm2708/patches-4.14/950-0365-Add-rpi-poe-fan-driver.patch
deleted file mode 100644
index ccf014b453..0000000000
--- a/target/linux/brcm2708/patches-4.14/950-0365-Add-rpi-poe-fan-driver.patch
+++ /dev/null
@@ -1,615 +0,0 @@
-From 1f8ba449fabb0eda1d835138d2324f8bc251e8c5 Mon Sep 17 00:00:00 2001
-From: Serge Schneider <serge@raspberrypi.org>
-Date: Mon, 9 Jul 2018 12:54:25 +0100
-Subject: [PATCH 365/454] Add rpi-poe-fan driver
-
-Signed-off-by: Serge Schneider <serge@raspberrypi.org>
----
- arch/arm/boot/dts/overlays/Makefile | 1 +
- arch/arm/boot/dts/overlays/README | 6 +
- .../arm/boot/dts/overlays/rpi-poe-overlay.dts | 61 +++
- arch/arm/configs/bcm2709_defconfig | 1 +
- arch/arm/configs/bcmrpi_defconfig | 1 +
- drivers/hwmon/Kconfig | 10 +
- drivers/hwmon/Makefile | 1 +
- drivers/hwmon/rpi-poe-fan.c | 443 ++++++++++++++++++
- include/soc/bcm2835/raspberrypi-firmware.h | 2 +
- 9 files changed, 526 insertions(+)
- create mode 100644 arch/arm/boot/dts/overlays/rpi-poe-overlay.dts
- create mode 100644 drivers/hwmon/rpi-poe-fan.c
-
---- a/arch/arm/boot/dts/overlays/Makefile
-+++ b/arch/arm/boot/dts/overlays/Makefile
-@@ -103,6 +103,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
- rpi-dac.dtbo \
- rpi-display.dtbo \
- rpi-ft5406.dtbo \
-+ rpi-poe.dtbo \
- rpi-proto.dtbo \
- rpi-sense.dtbo \
- rpi-tv.dtbo \
---- a/arch/arm/boot/dts/overlays/README
-+++ b/arch/arm/boot/dts/overlays/README
-@@ -1576,6 +1576,12 @@ Params: touchscreen-size-x Touchscr
- touchscreen-swapped-x-y Swap X and Y cordinates (default 0);
-
-
-+Name: rpi-poe
-+Info: Raspberry Pi POE HAT
-+Load: dtoverlay=rpi-poe
-+Params: <None>
-+
-+
- Name: rpi-proto
- Info: Configures the RPi Proto audio card
- Load: dtoverlay=rpi-proto
---- /dev/null
-+++ b/arch/arm/boot/dts/overlays/rpi-poe-overlay.dts
-@@ -0,0 +1,61 @@
-+/*
-+ * Overlay for the Raspberry Pi POE HAT.
-+ */
-+/dts-v1/;
-+/plugin/;
-+
-+/ {
-+ compatible = "brcm,bcm2708";
-+
-+ fragment@0 {
-+ target-path = "/";
-+ __overlay__ {
-+ fan0: rpi-poe-fan@0 {
-+ compatible = "rpi-poe-fan";
-+ firmware = <&firmware>;
-+ cooling-min-state = <0>;
-+ cooling-max-state = <3>;
-+ #cooling-cells = <2>;
-+ cooling-levels = <0 50 150 255>;
-+ status = "okay";
-+ };
-+ };
-+ };
-+
-+ fragment@1 {
-+ target = <&cpu_thermal>;
-+ __overlay__ {
-+ trips {
-+ threshold: trip-point@0 {
-+ temperature = <45000>;
-+ hysteresis = <5000>;
-+ type = "active";
-+ };
-+ target: trip-point@1 {
-+ temperature = <50000>;
-+ hysteresis = <2000>;
-+ type = "active";
-+ };
-+ cpu_hot: cpu_hot@0 {
-+ temperature = <55000>;
-+ hysteresis = <2000>;
-+ type = "active";
-+ };
-+ };
-+ cooling-maps {
-+ map0 {
-+ trip = <&threshold>;
-+ cooling-device = <&fan0 0 1>;
-+ };
-+ map1 {
-+ trip = <&target>;
-+ cooling-device = <&fan0 1 2>;
-+ };
-+ map2 {
-+ trip = <&cpu_hot>;
-+ cooling-device = <&fan0 2 3>;
-+ };
-+ };
-+ };
-+ };
-+};
---- a/arch/arm/configs/bcm2709_defconfig
-+++ b/arch/arm/configs/bcm2709_defconfig
-@@ -658,6 +658,7 @@ CONFIG_HWMON=m
- CONFIG_SENSORS_DS1621=m
- CONFIG_SENSORS_JC42=m
- CONFIG_SENSORS_LM75=m
-+CONFIG_SENSORS_RPI_POE_FAN=m
- CONFIG_SENSORS_SHT21=m
- CONFIG_SENSORS_SHT3x=m
- CONFIG_SENSORS_SHTC1=m
---- a/arch/arm/configs/bcmrpi_defconfig
-+++ b/arch/arm/configs/bcmrpi_defconfig
-@@ -651,6 +651,7 @@ CONFIG_HWMON=m
- CONFIG_SENSORS_DS1621=m
- CONFIG_SENSORS_JC42=m
- CONFIG_SENSORS_LM75=m
-+CONFIG_SENSORS_RPI_POE_FAN=m
- CONFIG_SENSORS_SHT21=m
- CONFIG_SENSORS_SHT3x=m
- CONFIG_SENSORS_SHTC1=m
---- a/drivers/hwmon/Kconfig
-+++ b/drivers/hwmon/Kconfig
-@@ -1286,6 +1286,16 @@ config SENSORS_PWM_FAN
- This driver can also be built as a module. If so, the module
- will be called pwm-fan.
-
-+config SENSORS_RPI_POE_FAN
-+ tristate "Raspberry Pi POE HAT fan"
-+ depends on RASPBERRYPI_FIRMWARE
-+ depends on THERMAL || THERMAL=n
-+ help
-+ If you say yes here you get support for Raspberry Pi POE HAT fan.
-+
-+ This driver can also be built as a module. If so, the module
-+ will be called rpi-poe-fan.
-+
- config SENSORS_SHT15
- tristate "Sensiron humidity and temperature sensors. SHT15 and compat."
- depends on GPIOLIB || COMPILE_TEST
---- a/drivers/hwmon/Makefile
-+++ b/drivers/hwmon/Makefile
-@@ -138,6 +138,7 @@ obj-$(CONFIG_SENSORS_PC87427) += pc87427
- obj-$(CONFIG_SENSORS_PCF8591) += pcf8591.o
- obj-$(CONFIG_SENSORS_POWR1220) += powr1220.o
- obj-$(CONFIG_SENSORS_PWM_FAN) += pwm-fan.o
-+obj-$(CONFIG_SENSORS_RPI_POE_FAN) += rpi-poe-fan.o
- obj-$(CONFIG_SENSORS_S3C) += s3c-hwmon.o
- obj-$(CONFIG_SENSORS_SCH56XX_COMMON)+= sch56xx-common.o
- obj-$(CONFIG_SENSORS_SCH5627) += sch5627.o
---- /dev/null
-+++ b/drivers/hwmon/rpi-poe-fan.c
-@@ -0,0 +1,443 @@
-+/*
-+ * rpi-poe-fan.c - Hwmon driver for Raspberry Pi POE HAT fan.
-+ *
-+ * Copyright (C) 2018 Raspberry Pi (Trading) Ltd.
-+ * Based on pwm-fan.c by Kamil Debski <k.debski@samsung.com>
-+ *
-+ * Author: Serge Schneider <serge@raspberrypi.org>
-+ *
-+ * 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.
-+ */
-+
-+#include <linux/hwmon.h>
-+#include <linux/hwmon-sysfs.h>
-+#include <linux/module.h>
-+#include <linux/mutex.h>
-+#include <linux/notifier.h>
-+#include <linux/of.h>
-+#include <linux/platform_device.h>
-+#include <linux/reboot.h>
-+#include <linux/sysfs.h>
-+#include <linux/thermal.h>
-+#include <soc/bcm2835/raspberrypi-firmware.h>
-+
-+#define MAX_PWM 255
-+
-+#define POE_CUR_PWM 0x0
-+#define POE_DEF_PWM 0x1
-+
-+struct rpi_poe_fan_ctx {
-+ struct mutex lock;
-+ struct rpi_firmware *fw;
-+ unsigned int pwm_value;
-+ unsigned int def_pwm_value;
-+ unsigned int rpi_poe_fan_state;
-+ unsigned int rpi_poe_fan_max_state;
-+ unsigned int *rpi_poe_fan_cooling_levels;
-+ struct thermal_cooling_device *cdev;
-+ struct notifier_block nb;
-+};
-+
-+struct m_data_s{
-+ u32 reg;
-+ u32 val;
-+ u32 ret;
-+};
-+
-+static int write_reg(struct rpi_firmware *fw, u32 reg, u32 *val){
-+ struct m_data_s m_data = {
-+ .reg = reg,
-+ .val = *val
-+ };
-+ int ret;
-+ ret = rpi_firmware_property(fw, RPI_FIRMWARE_SET_POE_HAT_VAL,
-+ &m_data, sizeof(m_data));
-+ if (ret) {
-+ return ret;
-+ } else if (m_data.ret) {
-+ return -EIO;
-+ }
-+ return 0;
-+}
-+
-+static int read_reg(struct rpi_firmware *fw, u32 reg, u32 *val){
-+ struct m_data_s m_data = {
-+ .reg = reg,
-+ };
-+ int ret;
-+ ret = rpi_firmware_property(fw, RPI_FIRMWARE_GET_POE_HAT_VAL,
-+ &m_data, sizeof(m_data));
-+ if (ret) {
-+ return ret;
-+ } else if (m_data.ret) {
-+ return -EIO;
-+ }
-+ *val = m_data.val;
-+ return 0;
-+}
-+
-+static int rpi_poe_reboot(struct notifier_block *nb, unsigned long code,
-+ void *unused)
-+{
-+ struct rpi_poe_fan_ctx *ctx = container_of(nb, struct rpi_poe_fan_ctx,
-+ nb);
-+
-+ if (ctx->pwm_value != ctx->def_pwm_value)
-+ write_reg(ctx->fw, POE_CUR_PWM, &ctx->def_pwm_value);
-+
-+ return NOTIFY_DONE;
-+}
-+
-+static int __set_pwm(struct rpi_poe_fan_ctx *ctx, u32 pwm)
-+{
-+ int ret = 0;
-+
-+ mutex_lock(&ctx->lock);
-+ if (ctx->pwm_value == pwm)
-+ goto exit_set_pwm_err;
-+
-+ ret = write_reg(ctx->fw, POE_CUR_PWM, &pwm);
-+ if (!ret)
-+ ctx->pwm_value = pwm;
-+exit_set_pwm_err:
-+ mutex_unlock(&ctx->lock);
-+ return ret;
-+}
-+
-+static int __set_def_pwm(struct rpi_poe_fan_ctx *ctx, u32 def_pwm)
-+{
-+ int ret = 0;
-+ mutex_lock(&ctx->lock);
-+ if (ctx->def_pwm_value == def_pwm)
-+ goto exit_set_def_pwm_err;
-+
-+ ret = write_reg(ctx->fw, POE_CUR_PWM, &def_pwm);
-+ if (!ret)
-+ ctx->def_pwm_value = def_pwm;
-+exit_set_def_pwm_err:
-+ mutex_unlock(&ctx->lock);
-+ return ret;
-+}
-+
-+static void rpi_poe_fan_update_state(struct rpi_poe_fan_ctx *ctx,
-+ unsigned long pwm)
-+{
-+ int i;
-+
-+ for (i = 0; i < ctx->rpi_poe_fan_max_state; ++i)
-+ if (pwm < ctx->rpi_poe_fan_cooling_levels[i + 1])
-+ break;
-+
-+ ctx->rpi_poe_fan_state = i;
-+}
-+
-+static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
-+ const char *buf, size_t count)
-+{
-+ struct rpi_poe_fan_ctx *ctx = dev_get_drvdata(dev);
-+ unsigned long pwm;
-+ int ret;
-+
-+ if (kstrtoul(buf, 10, &pwm) || pwm > MAX_PWM)
-+ return -EINVAL;
-+
-+ ret = __set_pwm(ctx, pwm);
-+ if (ret)
-+ return ret;
-+
-+ rpi_poe_fan_update_state(ctx, pwm);
-+ return count;
-+}
-+
-+static ssize_t set_def_pwm(struct device *dev, struct device_attribute *attr,
-+ const char *buf, size_t count)
-+{
-+ struct rpi_poe_fan_ctx *ctx = dev_get_drvdata(dev);
-+ unsigned long def_pwm;
-+ int ret;
-+
-+ if (kstrtoul(buf, 10, &def_pwm) || def_pwm > MAX_PWM)
-+ return -EINVAL;
-+
-+ ret = __set_def_pwm(ctx, def_pwm);
-+ if (ret)
-+ return ret;
-+ return count;
-+}
-+
-+static ssize_t show_pwm(struct device *dev,
-+ struct device_attribute *attr, char *buf)
-+{
-+ struct rpi_poe_fan_ctx *ctx = dev_get_drvdata(dev);
-+
-+ return sprintf(buf, "%u\n", ctx->pwm_value);
-+}
-+
-+static ssize_t show_def_pwm(struct device *dev,
-+ struct device_attribute *attr, char *buf)
-+{
-+ struct rpi_poe_fan_ctx *ctx = dev_get_drvdata(dev);
-+
-+ return sprintf(buf, "%u\n", ctx->def_pwm_value);
-+}
-+
-+
-+static SENSOR_DEVICE_ATTR(pwm1, 0644, show_pwm, set_pwm, 0);
-+static SENSOR_DEVICE_ATTR(def_pwm1, 0644, show_def_pwm, set_def_pwm, 1);
-+
-+static struct attribute *rpi_poe_fan_attrs[] = {
-+ &sensor_dev_attr_pwm1.dev_attr.attr,
-+ &sensor_dev_attr_def_pwm1.dev_attr.attr,
-+ NULL,
-+};
-+
-+ATTRIBUTE_GROUPS(rpi_poe_fan);
-+
-+/* thermal cooling device callbacks */
-+static int rpi_poe_fan_get_max_state(struct thermal_cooling_device *cdev,
-+ unsigned long *state)
-+{
-+ struct rpi_poe_fan_ctx *ctx = cdev->devdata;
-+
-+ if (!ctx)
-+ return -EINVAL;
-+
-+ *state = ctx->rpi_poe_fan_max_state;
-+
-+ return 0;
-+}
-+
-+static int rpi_poe_fan_get_cur_state(struct thermal_cooling_device *cdev,
-+ unsigned long *state)
-+{
-+ struct rpi_poe_fan_ctx *ctx = cdev->devdata;
-+
-+ if (!ctx)
-+ return -EINVAL;
-+
-+ *state = ctx->rpi_poe_fan_state;
-+
-+ return 0;
-+}
-+
-+static int rpi_poe_fan_set_cur_state(struct thermal_cooling_device *cdev,
-+ unsigned long state)
-+{
-+ struct rpi_poe_fan_ctx *ctx = cdev->devdata;
-+ int ret;
-+
-+ if (!ctx || (state > ctx->rpi_poe_fan_max_state))
-+ return -EINVAL;
-+
-+ if (state == ctx->rpi_poe_fan_state)
-+ return 0;
-+
-+ ret = __set_pwm(ctx, ctx->rpi_poe_fan_cooling_levels[state]);
-+ if (ret) {
-+ dev_err(&cdev->device, "Cannot set pwm!\n");
-+ return ret;
-+ }
-+
-+ ctx->rpi_poe_fan_state = state;
-+
-+ return ret;
-+}
-+
-+static const struct thermal_cooling_device_ops rpi_poe_fan_cooling_ops = {
-+ .get_max_state = rpi_poe_fan_get_max_state,
-+ .get_cur_state = rpi_poe_fan_get_cur_state,
-+ .set_cur_state = rpi_poe_fan_set_cur_state,
-+};
-+
-+static int rpi_poe_fan_of_get_cooling_data(struct device *dev,
-+ struct rpi_poe_fan_ctx *ctx)
-+{
-+ struct device_node *np = dev->of_node;
-+ int num, i, ret;
-+
-+ if (!of_find_property(np, "cooling-levels", NULL))
-+ return 0;
-+
-+ ret = of_property_count_u32_elems(np, "cooling-levels");
-+ if (ret <= 0) {
-+ dev_err(dev, "Wrong data!\n");
-+ return ret ? : -EINVAL;
-+ }
-+
-+ num = ret;
-+ ctx->rpi_poe_fan_cooling_levels = devm_kzalloc(dev, num * sizeof(u32),
-+ GFP_KERNEL);
-+ if (!ctx->rpi_poe_fan_cooling_levels)
-+ return -ENOMEM;
-+
-+ ret = of_property_read_u32_array(np, "cooling-levels",
-+ ctx->rpi_poe_fan_cooling_levels, num);
-+ if (ret) {
-+ dev_err(dev, "Property 'cooling-levels' cannot be read!\n");
-+ return ret;
-+ }
-+
-+ for (i = 0; i < num; i++) {
-+ if (ctx->rpi_poe_fan_cooling_levels[i] > MAX_PWM) {
-+ dev_err(dev, "PWM fan state[%d]:%d > %d\n", i,
-+ ctx->rpi_poe_fan_cooling_levels[i], MAX_PWM);
-+ return -EINVAL;
-+ }
-+ }
-+
-+ ctx->rpi_poe_fan_max_state = num - 1;
-+
-+ return 0;
-+}
-+
-+static int rpi_poe_fan_probe(struct platform_device *pdev)
-+{
-+ struct thermal_cooling_device *cdev;
-+ struct rpi_poe_fan_ctx *ctx;
-+ struct device *hwmon;
-+ struct device_node *np = pdev->dev.of_node;
-+ struct device_node *fw_node;
-+ int ret;
-+
-+ fw_node = of_parse_phandle(np, "firmware", 0);
-+ if (!fw_node) {
-+ dev_err(&pdev->dev, "Missing firmware node\n");
-+ return -ENOENT;
-+ }
-+
-+ ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
-+ if (!ctx)
-+ return -ENOMEM;
-+
-+ mutex_init(&ctx->lock);
-+
-+ ctx->fw = rpi_firmware_get(fw_node);
-+ if (!ctx->fw)
-+ return -EPROBE_DEFER;
-+
-+ platform_set_drvdata(pdev, ctx);
-+
-+ ctx->nb.notifier_call = rpi_poe_reboot;
-+ ret = register_reboot_notifier(&ctx->nb);
-+ if (ret) {
-+ dev_err(&pdev->dev, "Failed to register reboot notifier: %i\n",
-+ ret);
-+ return ret;
-+ }
-+ ret = read_reg(ctx->fw, POE_DEF_PWM, &ctx->def_pwm_value);
-+ if (ret) {
-+ dev_err(&pdev->dev, "Failed to get default PWM value: %i\n",
-+ ret);
-+ goto err;
-+ }
-+ ret = read_reg(ctx->fw, POE_CUR_PWM, &ctx->pwm_value);
-+ if (ret) {
-+ dev_err(&pdev->dev, "Failed to get current PWM value: %i\n",
-+ ret);
-+ goto err;
-+ }
-+
-+ hwmon = devm_hwmon_device_register_with_groups(&pdev->dev, "rpipoefan",
-+ ctx, rpi_poe_fan_groups);
-+ if (IS_ERR(hwmon)) {
-+ dev_err(&pdev->dev, "Failed to register hwmon device\n");
-+ ret = PTR_ERR(hwmon);
-+ goto err;
-+ }
-+
-+ ret = rpi_poe_fan_of_get_cooling_data(&pdev->dev, ctx);
-+ if (ret)
-+ return ret;
-+
-+ rpi_poe_fan_update_state(ctx, ctx->pwm_value);
-+ if (!IS_ENABLED(CONFIG_THERMAL))
-+ return 0;
-+
-+ cdev = thermal_of_cooling_device_register(np,
-+ "rpi-poe-fan", ctx,
-+ &rpi_poe_fan_cooling_ops);
-+ if (IS_ERR(cdev)) {
-+ dev_err(&pdev->dev,
-+ "Failed to register rpi-poe-fan as cooling device");
-+ ret = PTR_ERR(cdev);
-+ goto err;
-+ }
-+ ctx->cdev = cdev;
-+ thermal_cdev_update(cdev);
-+
-+ return 0;
-+err:
-+ unregister_reboot_notifier(&ctx->nb);
-+ return ret;
-+}
-+
-+static int rpi_poe_fan_remove(struct platform_device *pdev)
-+{
-+ struct rpi_poe_fan_ctx *ctx = platform_get_drvdata(pdev);
-+ u32 value = ctx->def_pwm_value;
-+
-+ unregister_reboot_notifier(&ctx->nb);
-+ thermal_cooling_device_unregister(ctx->cdev);
-+ if (ctx->pwm_value != value) {
-+ write_reg(ctx->fw, POE_CUR_PWM, &value);
-+ }
-+ return 0;
-+}
-+
-+#ifdef CONFIG_PM_SLEEP
-+static int rpi_poe_fan_suspend(struct device *dev)
-+{
-+ struct rpi_poe_fan_ctx *ctx = dev_get_drvdata(dev);
-+ u32 value = 0;
-+
-+ if (ctx->pwm_value != value)
-+ ret = write_reg(ctx->fw, POE_CUR_PWM, &value);
-+ return 0;
-+}
-+
-+static int rpi_poe_fan_resume(struct device *dev)
-+{
-+ struct rpi_poe_fan_ctx *ctx = dev_get_drvdata(dev);
-+ u32 value = ctx->pwm_value;
-+ int ret = 0;
-+
-+ if (value != 0)
-+ ret = write_reg(ctx->fw, POE_CUR_PWM, &value);
-+
-+ return ret;
-+}
-+#endif
-+
-+static SIMPLE_DEV_PM_OPS(rpi_poe_fan_pm, rpi_poe_fan_suspend,
-+ rpi_poe_fan_resume);
-+
-+static const struct of_device_id of_rpi_poe_fan_match[] = {
-+ { .compatible = "rpi-poe-fan", },
-+ {},
-+};
-+MODULE_DEVICE_TABLE(of, of_rpi_poe_fan_match);
-+
-+static struct platform_driver rpi_poe_fan_driver = {
-+ .probe = rpi_poe_fan_probe,
-+ .remove = rpi_poe_fan_remove,
-+ .driver = {
-+ .name = "rpi-poe-fan",
-+ .pm = &rpi_poe_fan_pm,
-+ .of_match_table = of_rpi_poe_fan_match,
-+ },
-+};
-+
-+module_platform_driver(rpi_poe_fan_driver);
-+
-+MODULE_AUTHOR("Serge Schneider <serge@raspberrypi.org>");
-+MODULE_ALIAS("platform:rpi-poe-fan");
-+MODULE_DESCRIPTION("Raspberry Pi POE HAT fan driver");
-+MODULE_LICENSE("GPL");
---- a/include/soc/bcm2835/raspberrypi-firmware.h
-+++ b/include/soc/bcm2835/raspberrypi-firmware.h
-@@ -93,6 +93,8 @@ enum rpi_firmware_property_tag {
- RPI_FIRMWARE_SET_GPIO_CONFIG = 0x00038043,
- RPI_FIRMWARE_GET_PERIPH_REG = 0x00030045,
- RPI_FIRMWARE_SET_PERIPH_REG = 0x00038045,
-+ RPI_FIRMWARE_GET_POE_HAT_VAL = 0x00030049,
-+ RPI_FIRMWARE_SET_POE_HAT_VAL = 0x00030050,
-
-
- /* Dispmanx TAGS */
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-12 19:57:59 +0000