+++ /dev/null
-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
-@@ -365,6 +365,11 @@ config INTEL_PCH_THERMAL
- Thermal reporting device will provide temperature reading,
- programmable trip points and other information.
-
-+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
- source "drivers/thermal/ti-soc-thermal/Kconfig"
---- 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");
projects / openwrt / openwrt.git / blobdiff