new file mode 100644
@@ -0,0 +1,27 @@
+* Broadcom Kona TMON bindings
+
+This version is for the Kona family of SoCs. The TMON (Temperature Monitor)
+block in a Kona SoC device is used to measure the chip temperature at constant
+intervals.
+The TMON block asserts an interrupt if temperature exceeds a user programmed
+threshold value. The TMON block would reset the entire device once it
+reaches a critical temperature which is also a programmable setting.
+
+Required properties:
+- compatible: "brcm,bcm11351-tmon", "brcm,kona-tmon"
+- reg: Address range of the thermal register
+- clocks: clock specifier of clock that drives the TMON block
+- interrupts: the interrupt signal associated with the TMON block
+- #thermal-sensor-cells: shall be 0. only one sensor is supported.
+Refer to clock/clock-bindings.txt for the generic clock consumer binding
+Refer to thermal/thermal.txt for the generic thermal sensor binding
+
+
+Example:
+ tmon@34008000 {
+ compatible = "brcm,bcm11351-tmon", "brcm,kona-tmon";
+ reg = <0x34008000 0x0024>;
+ clocks = <&tmon_1m_clk>;
+ interrupts = <GIC_SPI 183 IRQ_TYPE_LEVEL_HIGH>;
+ #thermal-sensor-cells = <0>;
+ };
@@ -166,6 +166,17 @@ config DB8500_THERMAL
created. Cooling devices can be bound to the trip points to cool this
thermal zone if trip points reached.
+config BCM_KONA_TMON_THERMAL
+ tristate "Temperature Monitor driver on Broadcom Kona family of SoCs"
+ depends on ARCH_BCM_MOBILE
+ depends on THERMAL_OF
+ default y
+ help
+ If you say yes here you get support for the TMON
+ (Temperature Monitor) in Broadcom Kona family of SoCs.
+ This also provides the generic support of the Thermal Framework
+ for Broadcom Kona family of SoCs.
+
config ARMADA_THERMAL
tristate "Armada 370/XP thermal management"
depends on ARCH_MVEBU
@@ -22,6 +22,7 @@ obj-$(CONFIG_SPEAR_THERMAL) += spear_thermal.o
obj-$(CONFIG_RCAR_THERMAL) += rcar_thermal.o
obj-$(CONFIG_KIRKWOOD_THERMAL) += kirkwood_thermal.o
obj-y += samsung/
+obj-$(CONFIG_BCM_KONA_TMON_THERMAL) += bcm_kona_tmon.o
obj-$(CONFIG_DOVE_THERMAL) += dove_thermal.o
obj-$(CONFIG_DB8500_THERMAL) += db8500_thermal.o
obj-$(CONFIG_ARMADA_THERMAL) += armada_thermal.o
new file mode 100644
@@ -0,0 +1,173 @@
+/*
+ * Copyright 2013 Broadcom Corporation.
+ *
+ * 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 (the "GPL").
+ *
+ * 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.
+ *
+ * A copy of the GPL is available at http://www.broadcom.com/licenses/GPLv2.php,
+ * or by writing to the Free Software Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+/**
+* Broadcom Kona Temperature Monitor (TMON) driver
+*
+* Note: The TMON hardware monitors a single sensor.
+*/
+
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/thermal.h>
+
+
+/* From TMON Register Database */
+#define TMON_TEMP_VAL_OFFSET 0x0000001c
+#define TMON_TEMP_VAL_TEMP_VAL_SHIFT 0
+#define TMON_TEMP_VAL_TEMP_VAL_MASK 0x000003ff
+
+/* Broadcom TMON Private Data Structure */
+struct bcm_tmon_data_priv {
+ void __iomem *base;
+ struct clk *external_clk;
+ struct thermal_zone_device *therm_dev;
+};
+
+/* Temperature conversion function for TMON block */
+static long raw_to_mcelsius(u32 raw)
+{
+ /*
+ * According to Broadcom internal Analog Module Specification
+ * the formula for converting TMON block output to temperature in
+ * degree Celsius is:
+ * T = 428 - (0.561 * raw)
+ * Note: the valid operating range for the TMON block is -40C to 125C
+ */
+ return 428000 - (561 * (long)raw);
+}
+
+/* Get temperature callback function for thermal zone */
+static int bcm_get_temp(void *sensor_data, long *temp)
+{
+ u32 raw;
+ long mcelsius;
+ struct bcm_tmon_data_priv *priv = sensor_data;
+
+ if (!priv) {
+ pr_err("%s: input sensor_data not initialized.\n", __func__);
+ return -EINVAL;
+ }
+
+ raw = (readl(priv->base + TMON_TEMP_VAL_OFFSET)
+ & TMON_TEMP_VAL_TEMP_VAL_MASK) >> TMON_TEMP_VAL_TEMP_VAL_SHIFT;
+
+ pr_debug("%s: raw temp 0x%x\n", __func__, raw);
+
+ mcelsius = raw_to_mcelsius(raw);
+
+ /*
+ * Since 'mcelsius' might be negative, we need to limit it to smallest
+ * unsigned value before returning it to thermal framework.
+ */
+ if (mcelsius < 0)
+ *temp = 0;
+ else
+ *temp = mcelsius;
+
+ pr_debug("%s: final temp %d\n", __func__, (int) *temp);
+
+ return 0;
+}
+
+static const struct of_device_id bcm_kona_tmon_match_table[] = {
+ { .compatible = "brcm,kona-tmon" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, bcm_kona_tmon_match_table);
+
+static int bcm_kona_tmon_probe(struct platform_device *pdev)
+{
+ struct thermal_zone_device *thermal = NULL;
+ struct bcm_tmon_data_priv *priv;
+ struct resource *res;
+
+ priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv) {
+ dev_err(&pdev->dev, "Failed to malloc priv.\n");
+ return -ENOMEM;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ priv->base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(priv->base))
+ return PTR_ERR(priv->base);
+
+ priv->external_clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(priv->external_clk))
+ return -ENODEV;
+
+ if (clk_prepare_enable(priv->external_clk) != 0)
+ return -EINVAL;
+
+ /*
+ * Note that get_trend() function is NULL. This is OK for now as
+ * we can rely on the get_tz_trend() from the Thermal Framework until
+ * we come up with a better way to determine the trend.
+ */
+ thermal = thermal_zone_of_sensor_register(&pdev->dev, 0, priv,
+ bcm_get_temp, NULL);
+
+ if (IS_ERR(thermal)) {
+ dev_err(&pdev->dev, "Failed to register BCM Kona TMON.\n");
+ clk_disable_unprepare(priv->external_clk);
+ return PTR_ERR(thermal);
+ }
+
+ priv->therm_dev = thermal;
+
+ platform_set_drvdata(pdev, priv);
+
+ dev_info(&pdev->dev, "BCM Kona TMON Initialized.\n");
+
+ return 0;
+}
+
+static int bcm_kona_tmon_remove(struct platform_device *pdev)
+{
+ struct bcm_tmon_data_priv *priv = platform_get_drvdata(pdev);
+
+ thermal_zone_of_sensor_unregister(&pdev->dev, priv->therm_dev);
+
+ clk_disable_unprepare(priv->external_clk);
+
+ dev_info(&pdev->dev, "BCM Kona TMON Uninitialized.\n");
+
+ return 0;
+}
+
+static struct platform_driver bcm_kona_tmon_driver = {
+ .driver = {
+ .name = "bcm-kona-tmon",
+ .owner = THIS_MODULE,
+ .of_match_table = bcm_kona_tmon_match_table,
+ },
+ .probe = bcm_kona_tmon_probe,
+ .remove = bcm_kona_tmon_remove,
+};
+
+module_platform_driver(bcm_kona_tmon_driver);
+
+MODULE_DESCRIPTION("Broadcom Kona Temperature Monitor Driver");
+MODULE_AUTHOR("Broadcom Corporation");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:bcm-kona-tmon");