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-rw-r--r--target/linux/ipq806x/patches-4.4/015-1-thermal-qcom-tsens-Add-a-skeletal-TSENS-drivers.patch536
1 files changed, 536 insertions, 0 deletions
diff --git a/target/linux/ipq806x/patches-4.4/015-1-thermal-qcom-tsens-Add-a-skeletal-TSENS-drivers.patch b/target/linux/ipq806x/patches-4.4/015-1-thermal-qcom-tsens-Add-a-skeletal-TSENS-drivers.patch
new file mode 100644
index 0000000000..ef7e2f4152
--- /dev/null
+++ b/target/linux/ipq806x/patches-4.4/015-1-thermal-qcom-tsens-Add-a-skeletal-TSENS-drivers.patch
@@ -0,0 +1,536 @@
+From 9066073c6c27994a30187abf3b674770b4088348 Mon Sep 17 00:00:00 2001
+From: Rajendra Nayak <rnayak@codeaurora.org>
+Date: Thu, 5 May 2016 14:21:39 +0530
+Subject: thermal: qcom: tsens: Add a skeletal TSENS drivers
+
+TSENS is Qualcomms' thermal temperature sensor device. It
+supports reading temperatures from multiple thermal sensors
+present on various QCOM SoCs.
+Calibration data is generally read from a non-volatile memory
+(eeprom) device.
+
+Add a skeleton driver with all the necessary abstractions so
+a variety of qcom device families which support TSENS can
+add driver extensions.
+
+Also add the required device tree bindings which can be used
+to describe the TSENS device in DT.
+
+Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org>
+Reviewed-by: Lina Iyer <lina.iyer@linaro.org>
+Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
+Signed-off-by: Zhang Rui <rui.zhang@intel.com>
+---
+ .../devicetree/bindings/thermal/qcom-tsens.txt | 21 +++
+ drivers/thermal/Kconfig | 5 +
+ drivers/thermal/Makefile | 1 +
+ drivers/thermal/qcom/Kconfig | 11 ++
+ drivers/thermal/qcom/Makefile | 2 +
+ drivers/thermal/qcom/tsens-common.c | 141 +++++++++++++++
+ drivers/thermal/qcom/tsens.c | 195 +++++++++++++++++++++
+ drivers/thermal/qcom/tsens.h | 90 ++++++++++
+ 8 files changed, 466 insertions(+)
+ create mode 100644 Documentation/devicetree/bindings/thermal/qcom-tsens.txt
+ create mode 100644 drivers/thermal/qcom/Kconfig
+ create mode 100644 drivers/thermal/qcom/Makefile
+ create mode 100644 drivers/thermal/qcom/tsens-common.c
+ create mode 100644 drivers/thermal/qcom/tsens.c
+ create mode 100644 drivers/thermal/qcom/tsens.h
+
+--- /dev/null
++++ b/Documentation/devicetree/bindings/thermal/qcom-tsens.txt
+@@ -0,0 +1,21 @@
++* QCOM SoC Temperature Sensor (TSENS)
++
++Required properties:
++- compatible :
++ - "qcom,msm8916-tsens" : For 8916 Family of SoCs
++ - "qcom,msm8974-tsens" : For 8974 Family of SoCs
++ - "qcom,msm8996-tsens" : For 8996 Family of SoCs
++
++- reg: Address range of the thermal registers
++- #thermal-sensor-cells : Should be 1. See ./thermal.txt for a description.
++- Refer to Documentation/devicetree/bindings/nvmem/nvmem.txt to know how to specify
++nvmem cells
++
++Example:
++tsens: thermal-sensor@900000 {
++ compatible = "qcom,msm8916-tsens";
++ reg = <0x4a8000 0x2000>;
++ nvmem-cells = <&tsens_caldata>, <&tsens_calsel>;
++ nvmem-cell-names = "caldata", "calsel";
++ #thermal-sensor-cells = <1>;
++ };
+--- a/drivers/thermal/Kconfig
++++ b/drivers/thermal/Kconfig
+@@ -391,4 +391,9 @@ config QCOM_SPMI_TEMP_ALARM
+ real time die temperature if an ADC is present or an estimate of the
+ temperature based upon the over temperature stage value.
+
++menu "Qualcomm thermal drivers"
++depends on (ARCH_QCOM && OF) || COMPILE_TEST
++source "drivers/thermal/qcom/Kconfig"
++endmenu
++
+ endif
+--- a/drivers/thermal/Makefile
++++ b/drivers/thermal/Makefile
+@@ -48,3 +48,4 @@ obj-$(CONFIG_INTEL_PCH_THERMAL) += intel
+ obj-$(CONFIG_ST_THERMAL) += st/
+ obj-$(CONFIG_TEGRA_SOCTHERM) += tegra_soctherm.o
+ obj-$(CONFIG_HISI_THERMAL) += hisi_thermal.o
++obj-$(CONFIG_QCOM_TSENS) += qcom/
+--- /dev/null
++++ b/drivers/thermal/qcom/Kconfig
+@@ -0,0 +1,11 @@
++config QCOM_TSENS
++ tristate "Qualcomm TSENS Temperature Alarm"
++ depends on THERMAL
++ depends on QCOM_QFPROM
++ depends on ARCH_QCOM || COMPILE_TEST
++ help
++ This enables the thermal sysfs driver for the TSENS device. It shows
++ up in Sysfs as a thermal zone with multiple trip points. Disabling the
++ thermal zone device via the mode file results in disabling the sensor.
++ Also able to set threshold temperature for both hot and cold and update
++ when a threshold is reached.
+--- /dev/null
++++ b/drivers/thermal/qcom/Makefile
+@@ -0,0 +1,2 @@
++obj-$(CONFIG_QCOM_TSENS) += qcom_tsens.o
++qcom_tsens-y += tsens.o tsens-common.o
+--- /dev/null
++++ b/drivers/thermal/qcom/tsens-common.c
+@@ -0,0 +1,141 @@
++/*
++ * Copyright (c) 2015, The Linux Foundation. All rights reserved.
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 and
++ * only version 2 as published by the Free Software Foundation.
++ *
++ * 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/err.h>
++#include <linux/io.h>
++#include <linux/nvmem-consumer.h>
++#include <linux/of_address.h>
++#include <linux/platform_device.h>
++#include <linux/regmap.h>
++#include "tsens.h"
++
++#define S0_ST_ADDR 0x1030
++#define SN_ADDR_OFFSET 0x4
++#define SN_ST_TEMP_MASK 0x3ff
++#define CAL_DEGC_PT1 30
++#define CAL_DEGC_PT2 120
++#define SLOPE_FACTOR 1000
++#define SLOPE_DEFAULT 3200
++
++char *qfprom_read(struct device *dev, const char *cname)
++{
++ struct nvmem_cell *cell;
++ ssize_t data;
++ char *ret;
++
++ cell = nvmem_cell_get(dev, cname);
++ if (IS_ERR(cell))
++ return ERR_CAST(cell);
++
++ ret = nvmem_cell_read(cell, &data);
++ nvmem_cell_put(cell);
++
++ return ret;
++}
++
++/*
++ * Use this function on devices where slope and offset calculations
++ * depend on calibration data read from qfprom. On others the slope
++ * and offset values are derived from tz->tzp->slope and tz->tzp->offset
++ * resp.
++ */
++void compute_intercept_slope(struct tsens_device *tmdev, u32 *p1,
++ u32 *p2, u32 mode)
++{
++ int i;
++ int num, den;
++
++ for (i = 0; i < tmdev->num_sensors; i++) {
++ dev_dbg(tmdev->dev,
++ "sensor%d - data_point1:%#x data_point2:%#x\n",
++ i, p1[i], p2[i]);
++
++ tmdev->sensor[i].slope = SLOPE_DEFAULT;
++ if (mode == TWO_PT_CALIB) {
++ /*
++ * slope (m) = adc_code2 - adc_code1 (y2 - y1)/
++ * temp_120_degc - temp_30_degc (x2 - x1)
++ */
++ num = p2[i] - p1[i];
++ num *= SLOPE_FACTOR;
++ den = CAL_DEGC_PT2 - CAL_DEGC_PT1;
++ tmdev->sensor[i].slope = num / den;
++ }
++
++ tmdev->sensor[i].offset = (p1[i] * SLOPE_FACTOR) -
++ (CAL_DEGC_PT1 *
++ tmdev->sensor[i].slope);
++ dev_dbg(tmdev->dev, "offset:%d\n", tmdev->sensor[i].offset);
++ }
++}
++
++static inline int code_to_degc(u32 adc_code, const struct tsens_sensor *s)
++{
++ int degc, num, den;
++
++ num = (adc_code * SLOPE_FACTOR) - s->offset;
++ den = s->slope;
++
++ if (num > 0)
++ degc = num + (den / 2);
++ else if (num < 0)
++ degc = num - (den / 2);
++ else
++ degc = num;
++
++ degc /= den;
++
++ return degc;
++}
++
++int get_temp_common(struct tsens_device *tmdev, int id, int *temp)
++{
++ struct tsens_sensor *s = &tmdev->sensor[id];
++ u32 code;
++ unsigned int sensor_addr;
++ int last_temp = 0, ret;
++
++ sensor_addr = S0_ST_ADDR + s->hw_id * SN_ADDR_OFFSET;
++ ret = regmap_read(tmdev->map, sensor_addr, &code);
++ if (ret)
++ return ret;
++ last_temp = code & SN_ST_TEMP_MASK;
++
++ *temp = code_to_degc(last_temp, s) * 1000;
++
++ return 0;
++}
++
++static const struct regmap_config tsens_config = {
++ .reg_bits = 32,
++ .val_bits = 32,
++ .reg_stride = 4,
++};
++
++int __init init_common(struct tsens_device *tmdev)
++{
++ void __iomem *base;
++
++ base = of_iomap(tmdev->dev->of_node, 0);
++ if (IS_ERR(base))
++ return -EINVAL;
++
++ tmdev->map = devm_regmap_init_mmio(tmdev->dev, base, &tsens_config);
++ if (!tmdev->map) {
++ iounmap(base);
++ return -ENODEV;
++ }
++
++ return 0;
++}
+--- /dev/null
++++ b/drivers/thermal/qcom/tsens.c
+@@ -0,0 +1,195 @@
++/*
++ * Copyright (c) 2015, The Linux Foundation. All rights reserved.
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 and
++ * only version 2 as published by the Free Software Foundation.
++ *
++ * 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/err.h>
++#include <linux/module.h>
++#include <linux/of.h>
++#include <linux/platform_device.h>
++#include <linux/pm.h>
++#include <linux/slab.h>
++#include <linux/thermal.h>
++#include "tsens.h"
++
++static int tsens_get_temp(void *data, int *temp)
++{
++ const struct tsens_sensor *s = data;
++ struct tsens_device *tmdev = s->tmdev;
++
++ return tmdev->ops->get_temp(tmdev, s->id, temp);
++}
++
++static int tsens_get_trend(void *data, long *temp)
++{
++ const struct tsens_sensor *s = data;
++ struct tsens_device *tmdev = s->tmdev;
++
++ if (tmdev->ops->get_trend)
++ return tmdev->ops->get_trend(tmdev, s->id, temp);
++
++ return -ENOTSUPP;
++}
++
++static int tsens_suspend(struct device *dev)
++{
++ struct tsens_device *tmdev = dev_get_drvdata(dev);
++
++ if (tmdev->ops && tmdev->ops->suspend)
++ return tmdev->ops->suspend(tmdev);
++
++ return 0;
++}
++
++static int tsens_resume(struct device *dev)
++{
++ struct tsens_device *tmdev = dev_get_drvdata(dev);
++
++ if (tmdev->ops && tmdev->ops->resume)
++ return tmdev->ops->resume(tmdev);
++
++ return 0;
++}
++
++static SIMPLE_DEV_PM_OPS(tsens_pm_ops, tsens_suspend, tsens_resume);
++
++static const struct of_device_id tsens_table[] = {
++ {
++ .compatible = "qcom,msm8916-tsens",
++ }, {
++ .compatible = "qcom,msm8974-tsens",
++ },
++ {}
++};
++MODULE_DEVICE_TABLE(of, tsens_table);
++
++static const struct thermal_zone_of_device_ops tsens_of_ops = {
++ .get_temp = tsens_get_temp,
++ .get_trend = tsens_get_trend,
++};
++
++static int tsens_register(struct tsens_device *tmdev)
++{
++ int i;
++ struct thermal_zone_device *tzd;
++ u32 *hw_id, n = tmdev->num_sensors;
++
++ hw_id = devm_kcalloc(tmdev->dev, n, sizeof(u32), GFP_KERNEL);
++ if (!hw_id)
++ return -ENOMEM;
++
++ for (i = 0; i < tmdev->num_sensors; i++) {
++ tmdev->sensor[i].tmdev = tmdev;
++ tmdev->sensor[i].id = i;
++ tzd = devm_thermal_zone_of_sensor_register(tmdev->dev, i,
++ &tmdev->sensor[i],
++ &tsens_of_ops);
++ if (IS_ERR(tzd))
++ continue;
++ tmdev->sensor[i].tzd = tzd;
++ if (tmdev->ops->enable)
++ tmdev->ops->enable(tmdev, i);
++ }
++ return 0;
++}
++
++static int tsens_probe(struct platform_device *pdev)
++{
++ int ret, i;
++ struct device *dev;
++ struct device_node *np;
++ struct tsens_sensor *s;
++ struct tsens_device *tmdev;
++ const struct tsens_data *data;
++ const struct of_device_id *id;
++
++ if (pdev->dev.of_node)
++ dev = &pdev->dev;
++ else
++ dev = pdev->dev.parent;
++
++ np = dev->of_node;
++
++ id = of_match_node(tsens_table, np);
++ if (!id)
++ return -EINVAL;
++
++ data = id->data;
++
++ if (data->num_sensors <= 0) {
++ dev_err(dev, "invalid number of sensors\n");
++ return -EINVAL;
++ }
++
++ tmdev = devm_kzalloc(dev, sizeof(*tmdev) +
++ data->num_sensors * sizeof(*s), GFP_KERNEL);
++ if (!tmdev)
++ return -ENOMEM;
++
++ tmdev->dev = dev;
++ tmdev->num_sensors = data->num_sensors;
++ tmdev->ops = data->ops;
++ for (i = 0; i < tmdev->num_sensors; i++) {
++ if (data->hw_ids)
++ tmdev->sensor[i].hw_id = data->hw_ids[i];
++ else
++ tmdev->sensor[i].hw_id = i;
++ }
++
++ if (!tmdev->ops || !tmdev->ops->init || !tmdev->ops->get_temp)
++ return -EINVAL;
++
++ ret = tmdev->ops->init(tmdev);
++ if (ret < 0) {
++ dev_err(dev, "tsens init failed\n");
++ return ret;
++ }
++
++ if (tmdev->ops->calibrate) {
++ ret = tmdev->ops->calibrate(tmdev);
++ if (ret < 0) {
++ dev_err(dev, "tsens calibration failed\n");
++ return ret;
++ }
++ }
++
++ ret = tsens_register(tmdev);
++
++ platform_set_drvdata(pdev, tmdev);
++
++ return ret;
++}
++
++static int tsens_remove(struct platform_device *pdev)
++{
++ struct tsens_device *tmdev = platform_get_drvdata(pdev);
++
++ if (tmdev->ops->disable)
++ tmdev->ops->disable(tmdev);
++
++ return 0;
++}
++
++static struct platform_driver tsens_driver = {
++ .probe = tsens_probe,
++ .remove = tsens_remove,
++ .driver = {
++ .name = "qcom-tsens",
++ .pm = &tsens_pm_ops,
++ .of_match_table = tsens_table,
++ },
++};
++module_platform_driver(tsens_driver);
++
++MODULE_LICENSE("GPL v2");
++MODULE_DESCRIPTION("QCOM Temperature Sensor driver");
++MODULE_ALIAS("platform:qcom-tsens");
+--- /dev/null
++++ b/drivers/thermal/qcom/tsens.h
+@@ -0,0 +1,90 @@
++/*
++ * Copyright (c) 2015, The Linux Foundation. All rights reserved.
++ *
++ * This software is licensed under the terms of the GNU General Public
++ * License version 2, as published by the Free Software Foundation, and
++ * may be copied, distributed, and modified under those terms.
++ *
++ * 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.
++ */
++#ifndef __QCOM_TSENS_H__
++#define __QCOM_TSENS_H__
++
++#define ONE_PT_CALIB 0x1
++#define ONE_PT_CALIB2 0x2
++#define TWO_PT_CALIB 0x3
++
++struct tsens_device;
++
++struct tsens_sensor {
++ struct tsens_device *tmdev;
++ struct thermal_zone_device *tzd;
++ int offset;
++ int id;
++ int hw_id;
++ int slope;
++ u32 status;
++};
++
++/**
++ * struct tsens_ops - operations as supported by the tsens device
++ * @init: Function to initialize the tsens device
++ * @calibrate: Function to calibrate the tsens device
++ * @get_temp: Function which returns the temp in millidegC
++ * @enable: Function to enable (clocks/power) tsens device
++ * @disable: Function to disable the tsens device
++ * @suspend: Function to suspend the tsens device
++ * @resume: Function to resume the tsens device
++ * @get_trend: Function to get the thermal/temp trend
++ */
++struct tsens_ops {
++ /* mandatory callbacks */
++ int (*init)(struct tsens_device *);
++ int (*calibrate)(struct tsens_device *);
++ int (*get_temp)(struct tsens_device *, int, int *);
++ /* optional callbacks */
++ int (*enable)(struct tsens_device *, int);
++ void (*disable)(struct tsens_device *);
++ int (*suspend)(struct tsens_device *);
++ int (*resume)(struct tsens_device *);
++ int (*get_trend)(struct tsens_device *, int, long *);
++};
++
++/**
++ * struct tsens_data - tsens instance specific data
++ * @num_sensors: Max number of sensors supported by platform
++ * @ops: operations the tsens instance supports
++ * @hw_ids: Subset of sensors ids supported by platform, if not the first n
++ */
++struct tsens_data {
++ const u32 num_sensors;
++ const struct tsens_ops *ops;
++ unsigned int *hw_ids;
++};
++
++/* Registers to be saved/restored across a context loss */
++struct tsens_context {
++ int threshold;
++ int control;
++};
++
++struct tsens_device {
++ struct device *dev;
++ u32 num_sensors;
++ struct regmap *map;
++ struct regmap_field *status_field;
++ struct tsens_context ctx;
++ bool trdy;
++ const struct tsens_ops *ops;
++ struct tsens_sensor sensor[0];
++};
++
++char *qfprom_read(struct device *, const char *);
++void compute_intercept_slope(struct tsens_device *, u32 *, u32 *, u32);
++int init_common(struct tsens_device *);
++int get_temp_common(struct tsens_device *, int, int *);
++
++#endif /* __QCOM_TSENS_H__ */
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