diff options
Diffstat (limited to 'target/linux/generic/patches-4.9/081-0002-thermal-broadcom-add-Northstar-thermal-driver.patch')
| -rw-r--r-- | target/linux/generic/patches-4.9/081-0002-thermal-broadcom-add-Northstar-thermal-driver.patch | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/target/linux/generic/patches-4.9/081-0002-thermal-broadcom-add-Northstar-thermal-driver.patch b/target/linux/generic/patches-4.9/081-0002-thermal-broadcom-add-Northstar-thermal-driver.patch new file mode 100644 index 0000000..8ba8cb5 --- /dev/null +++ b/target/linux/generic/patches-4.9/081-0002-thermal-broadcom-add-Northstar-thermal-driver.patch @@ -0,0 +1,173 @@ +From a94cb7eeecc4104a6874339f90c5d0647359c102 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl> +Date: Mon, 3 Apr 2017 17:48:29 +0200 +Subject: [PATCH] thermal: broadcom: add Northstar thermal driver +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Northstar is a SoC family commonly used in home routers. This commit +adds a driver for checking CPU temperature. As Northstar Plus seems to +also have this IP block this new symbol gets ARCH_BCM_IPROC dependency. + +Signed-off-by: Rafał Miłecki <rafal@milecki.pl> +Signed-off-by: Jon Mason <jon.mason@broadcom.com> +Signed-off-by: Eduardo Valentin <edubezval@gmail.com> +--- + drivers/thermal/Kconfig | 5 ++ + drivers/thermal/Makefile | 1 + + drivers/thermal/broadcom/Kconfig | 8 +++ + drivers/thermal/broadcom/Makefile | 1 + + drivers/thermal/broadcom/ns-thermal.c | 105 ++++++++++++++++++++++++++++++++++ + 5 files changed, 120 insertions(+) + create mode 100644 drivers/thermal/broadcom/Kconfig + create mode 100644 drivers/thermal/broadcom/Makefile + create mode 100644 drivers/thermal/broadcom/ns-thermal.c + +--- a/drivers/thermal/Kconfig ++++ b/drivers/thermal/Kconfig +@@ -381,6 +381,11 @@ config MTK_THERMAL + Enable this option if you want to have support for thermal management + controller present in Mediatek SoCs + ++menu "Broadcom thermal drivers" ++depends on ARCH_BCM || COMPILE_TEST ++source "drivers/thermal/broadcom/Kconfig" ++endmenu ++ + menu "Texas Instruments thermal drivers" + depends on ARCH_HAS_BANDGAP || COMPILE_TEST + depends on HAS_IOMEM +--- a/drivers/thermal/Makefile ++++ b/drivers/thermal/Makefile +@@ -26,6 +26,7 @@ thermal_sys-$(CONFIG_CLOCK_THERMAL) += c + thermal_sys-$(CONFIG_DEVFREQ_THERMAL) += devfreq_cooling.o + + # platform thermal drivers ++obj-y += broadcom/ + obj-$(CONFIG_QCOM_SPMI_TEMP_ALARM) += qcom-spmi-temp-alarm.o + obj-$(CONFIG_SPEAR_THERMAL) += spear_thermal.o + obj-$(CONFIG_ROCKCHIP_THERMAL) += rockchip_thermal.o +--- /dev/null ++++ b/drivers/thermal/broadcom/Kconfig +@@ -0,0 +1,8 @@ ++config BCM_NS_THERMAL ++ tristate "Northstar thermal driver" ++ depends on ARCH_BCM_IPROC || COMPILE_TEST ++ help ++ Northstar is a family of SoCs that includes e.g. BCM4708, BCM47081, ++ BCM4709 and BCM47094. It contains DMU (Device Management Unit) block ++ with a thermal sensor that allows checking CPU temperature. This ++ driver provides support for it. +--- /dev/null ++++ b/drivers/thermal/broadcom/Makefile +@@ -0,0 +1 @@ ++obj-$(CONFIG_BCM_NS_THERMAL) += ns-thermal.o +--- /dev/null ++++ b/drivers/thermal/broadcom/ns-thermal.c +@@ -0,0 +1,105 @@ ++/* ++ * Copyright (C) 2017 Rafał Miłecki <rafal@milecki.pl> ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License version 2 as ++ * published by the Free Software Foundation. ++ */ ++ ++#include <linux/module.h> ++#include <linux/of_address.h> ++#include <linux/platform_device.h> ++#include <linux/thermal.h> ++ ++#define PVTMON_CONTROL0 0x00 ++#define PVTMON_CONTROL0_SEL_MASK 0x0000000e ++#define PVTMON_CONTROL0_SEL_TEMP_MONITOR 0x00000000 ++#define PVTMON_CONTROL0_SEL_TEST_MODE 0x0000000e ++#define PVTMON_STATUS 0x08 ++ ++struct ns_thermal { ++ struct thermal_zone_device *tz; ++ void __iomem *pvtmon; ++}; ++ ++static int ns_thermal_get_temp(void *data, int *temp) ++{ ++ struct ns_thermal *ns_thermal = data; ++ int offset = thermal_zone_get_offset(ns_thermal->tz); ++ int slope = thermal_zone_get_slope(ns_thermal->tz); ++ u32 val; ++ ++ val = readl(ns_thermal->pvtmon + PVTMON_CONTROL0); ++ if ((val & PVTMON_CONTROL0_SEL_MASK) != PVTMON_CONTROL0_SEL_TEMP_MONITOR) { ++ /* Clear current mode selection */ ++ val &= ~PVTMON_CONTROL0_SEL_MASK; ++ ++ /* Set temp monitor mode (it's the default actually) */ ++ val |= PVTMON_CONTROL0_SEL_TEMP_MONITOR; ++ ++ writel(val, ns_thermal->pvtmon + PVTMON_CONTROL0); ++ } ++ ++ val = readl(ns_thermal->pvtmon + PVTMON_STATUS); ++ *temp = slope * val + offset; ++ ++ return 0; ++} ++ ++static const struct thermal_zone_of_device_ops ns_thermal_ops = { ++ .get_temp = ns_thermal_get_temp, ++}; ++ ++static int ns_thermal_probe(struct platform_device *pdev) ++{ ++ struct device *dev = &pdev->dev; ++ struct ns_thermal *ns_thermal; ++ ++ ns_thermal = devm_kzalloc(dev, sizeof(*ns_thermal), GFP_KERNEL); ++ if (!ns_thermal) ++ return -ENOMEM; ++ ++ ns_thermal->pvtmon = of_iomap(dev_of_node(dev), 0); ++ if (WARN_ON(!ns_thermal->pvtmon)) ++ return -ENOENT; ++ ++ ns_thermal->tz = devm_thermal_zone_of_sensor_register(dev, 0, ++ ns_thermal, ++ &ns_thermal_ops); ++ if (IS_ERR(ns_thermal->tz)) { ++ iounmap(ns_thermal->pvtmon); ++ return PTR_ERR(ns_thermal->tz); ++ } ++ ++ platform_set_drvdata(pdev, ns_thermal); ++ ++ return 0; ++} ++ ++static int ns_thermal_remove(struct platform_device *pdev) ++{ ++ struct ns_thermal *ns_thermal = platform_get_drvdata(pdev); ++ ++ iounmap(ns_thermal->pvtmon); ++ ++ return 0; ++} ++ ++static const struct of_device_id ns_thermal_of_match[] = { ++ { .compatible = "brcm,ns-thermal", }, ++ {}, ++}; ++MODULE_DEVICE_TABLE(of, ns_thermal_of_match); ++ ++static struct platform_driver ns_thermal_driver = { ++ .probe = ns_thermal_probe, ++ .remove = ns_thermal_remove, ++ .driver = { ++ .name = "ns-thermal", ++ .of_match_table = ns_thermal_of_match, ++ }, ++}; ++module_platform_driver(ns_thermal_driver); ++ ++MODULE_DESCRIPTION("Northstar thermal driver"); ++MODULE_LICENSE("GPL v2"); |