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thermal: qoriq: Add thermal management support
This driver add thermal management support by enabling TMU (Thermal Monitoring Unit) on QorIQ platform. It's based on thermal of framework: - Trip points defined in device tree. - Cpufreq as cooling device registered in qoriq cpufreq driver. Signed-off-by: Jia Hongtao <hongtao.jia@nxp.com> Signed-off-by: Zhang Rui <rui.zhang@intel.com>
This commit is contained in:
Jia Hongtao
Zhang Rui
parent
64a411e804
commit
43528445f6
@ -195,6 +195,16 @@ config IMX_THERMAL
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cpufreq is used as the cooling device to throttle CPUs when the
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passive trip is crossed.
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config QORIQ_THERMAL
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tristate "QorIQ Thermal Monitoring Unit"
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depends on THERMAL_OF
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depends on HAS_IOMEM
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help
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Support for Thermal Monitoring Unit (TMU) found on QorIQ platforms.
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It supports one critical trip point and one passive trip point. The
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cpufreq is used as the cooling device to throttle CPUs when the
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passive trip is crossed.
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config SPEAR_THERMAL
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tristate "SPEAr thermal sensor driver"
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depends on PLAT_SPEAR || COMPILE_TEST
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@ -37,6 +37,7 @@ obj-$(CONFIG_DB8500_THERMAL) += db8500_thermal.o
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obj-$(CONFIG_ARMADA_THERMAL) += armada_thermal.o
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obj-$(CONFIG_TANGO_THERMAL) += tango_thermal.o
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obj-$(CONFIG_IMX_THERMAL) += imx_thermal.o
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obj-$(CONFIG_QORIQ_THERMAL) += qoriq_thermal.o
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obj-$(CONFIG_DB8500_CPUFREQ_COOLING) += db8500_cpufreq_cooling.o
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obj-$(CONFIG_INTEL_POWERCLAMP) += intel_powerclamp.o
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obj-$(CONFIG_X86_PKG_TEMP_THERMAL) += x86_pkg_temp_thermal.o
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328
drivers/thermal/qoriq_thermal.c
Normal file
328
drivers/thermal/qoriq_thermal.c
Normal file
@ -0,0 +1,328 @@
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/*
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* Copyright 2016 Freescale Semiconductor, Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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*/
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/err.h>
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#include <linux/io.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/thermal.h>
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#include "thermal_core.h"
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#define SITES_MAX 16
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/*
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* QorIQ TMU Registers
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*/
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struct qoriq_tmu_site_regs {
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u32 tritsr; /* Immediate Temperature Site Register */
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u32 tratsr; /* Average Temperature Site Register */
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u8 res0[0x8];
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};
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struct qoriq_tmu_regs {
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u32 tmr; /* Mode Register */
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#define TMR_DISABLE 0x0
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#define TMR_ME 0x80000000
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#define TMR_ALPF 0x0c000000
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u32 tsr; /* Status Register */
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u32 tmtmir; /* Temperature measurement interval Register */
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#define TMTMIR_DEFAULT 0x0000000f
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u8 res0[0x14];
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u32 tier; /* Interrupt Enable Register */
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#define TIER_DISABLE 0x0
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u32 tidr; /* Interrupt Detect Register */
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u32 tiscr; /* Interrupt Site Capture Register */
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u32 ticscr; /* Interrupt Critical Site Capture Register */
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u8 res1[0x10];
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u32 tmhtcrh; /* High Temperature Capture Register */
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u32 tmhtcrl; /* Low Temperature Capture Register */
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u8 res2[0x8];
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u32 tmhtitr; /* High Temperature Immediate Threshold */
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u32 tmhtatr; /* High Temperature Average Threshold */
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u32 tmhtactr; /* High Temperature Average Crit Threshold */
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u8 res3[0x24];
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u32 ttcfgr; /* Temperature Configuration Register */
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u32 tscfgr; /* Sensor Configuration Register */
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u8 res4[0x78];
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struct qoriq_tmu_site_regs site[SITES_MAX];
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u8 res5[0x9f8];
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u32 ipbrr0; /* IP Block Revision Register 0 */
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u32 ipbrr1; /* IP Block Revision Register 1 */
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u8 res6[0x310];
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u32 ttr0cr; /* Temperature Range 0 Control Register */
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u32 ttr1cr; /* Temperature Range 1 Control Register */
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u32 ttr2cr; /* Temperature Range 2 Control Register */
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u32 ttr3cr; /* Temperature Range 3 Control Register */
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};
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/*
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* Thermal zone data
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*/
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struct qoriq_tmu_data {
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struct thermal_zone_device *tz;
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struct qoriq_tmu_regs __iomem *regs;
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int sensor_id;
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bool little_endian;
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};
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static void tmu_write(struct qoriq_tmu_data *p, u32 val, void __iomem *addr)
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{
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if (p->little_endian)
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iowrite32(val, addr);
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else
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iowrite32be(val, addr);
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}
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static u32 tmu_read(struct qoriq_tmu_data *p, void __iomem *addr)
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{
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if (p->little_endian)
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return ioread32(addr);
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else
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return ioread32be(addr);
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}
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static int tmu_get_temp(void *p, int *temp)
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{
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u32 val;
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struct qoriq_tmu_data *data = p;
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val = tmu_read(data, &data->regs->site[data->sensor_id].tritsr);
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*temp = (val & 0xff) * 1000;
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return 0;
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}
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static int qoriq_tmu_get_sensor_id(void)
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{
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int ret, id;
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struct of_phandle_args sensor_specs;
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struct device_node *np, *sensor_np;
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np = of_find_node_by_name(NULL, "thermal-zones");
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if (!np)
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return -ENODEV;
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sensor_np = of_get_next_child(np, NULL);
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ret = of_parse_phandle_with_args(sensor_np, "thermal-sensors",
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"#thermal-sensor-cells",
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0, &sensor_specs);
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if (ret) {
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of_node_put(np);
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of_node_put(sensor_np);
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return ret;
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}
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if (sensor_specs.args_count >= 1) {
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id = sensor_specs.args[0];
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WARN(sensor_specs.args_count > 1,
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"%s: too many cells in sensor specifier %d\n",
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sensor_specs.np->name, sensor_specs.args_count);
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} else {
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id = 0;
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}
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of_node_put(np);
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of_node_put(sensor_np);
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return id;
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}
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static int qoriq_tmu_calibration(struct platform_device *pdev)
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{
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int i, val, len;
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u32 range[4];
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const u32 *calibration;
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struct device_node *np = pdev->dev.of_node;
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struct qoriq_tmu_data *data = platform_get_drvdata(pdev);
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if (of_property_read_u32_array(np, "fsl,tmu-range", range, 4)) {
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dev_err(&pdev->dev, "missing calibration range.\n");
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return -ENODEV;
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}
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/* Init temperature range registers */
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tmu_write(data, range[0], &data->regs->ttr0cr);
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tmu_write(data, range[1], &data->regs->ttr1cr);
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tmu_write(data, range[2], &data->regs->ttr2cr);
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tmu_write(data, range[3], &data->regs->ttr3cr);
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calibration = of_get_property(np, "fsl,tmu-calibration", &len);
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if (calibration == NULL || len % 8) {
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dev_err(&pdev->dev, "invalid calibration data.\n");
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return -ENODEV;
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}
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for (i = 0; i < len; i += 8, calibration += 2) {
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val = of_read_number(calibration, 1);
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tmu_write(data, val, &data->regs->ttcfgr);
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val = of_read_number(calibration + 1, 1);
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tmu_write(data, val, &data->regs->tscfgr);
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}
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return 0;
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}
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static void qoriq_tmu_init_device(struct qoriq_tmu_data *data)
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{
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/* Disable interrupt, using polling instead */
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tmu_write(data, TIER_DISABLE, &data->regs->tier);
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/* Set update_interval */
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tmu_write(data, TMTMIR_DEFAULT, &data->regs->tmtmir);
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/* Disable monitoring */
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tmu_write(data, TMR_DISABLE, &data->regs->tmr);
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}
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static struct thermal_zone_of_device_ops tmu_tz_ops = {
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.get_temp = tmu_get_temp,
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};
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static int qoriq_tmu_probe(struct platform_device *pdev)
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{
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int ret;
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const struct thermal_trip *trip;
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struct qoriq_tmu_data *data;
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struct device_node *np = pdev->dev.of_node;
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u32 site = 0;
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if (!np) {
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dev_err(&pdev->dev, "Device OF-Node is NULL");
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return -ENODEV;
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}
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data = devm_kzalloc(&pdev->dev, sizeof(struct qoriq_tmu_data),
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GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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platform_set_drvdata(pdev, data);
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data->little_endian = of_property_read_bool(np, "little-endian");
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data->sensor_id = qoriq_tmu_get_sensor_id();
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if (data->sensor_id < 0) {
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dev_err(&pdev->dev, "Failed to get sensor id\n");
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ret = -ENODEV;
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goto err_iomap;
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}
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data->regs = of_iomap(np, 0);
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if (!data->regs) {
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dev_err(&pdev->dev, "Failed to get memory region\n");
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ret = -ENODEV;
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goto err_iomap;
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}
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qoriq_tmu_init_device(data); /* TMU initialization */
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ret = qoriq_tmu_calibration(pdev); /* TMU calibration */
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if (ret < 0)
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goto err_tmu;
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data->tz = thermal_zone_of_sensor_register(&pdev->dev, data->sensor_id,
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data, &tmu_tz_ops);
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if (IS_ERR(data->tz)) {
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ret = PTR_ERR(data->tz);
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dev_err(&pdev->dev,
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"Failed to register thermal zone device %d\n", ret);
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goto err_tmu;
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}
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trip = of_thermal_get_trip_points(data->tz);
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/* Enable monitoring */
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site |= 0x1 << (15 - data->sensor_id);
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tmu_write(data, site | TMR_ME | TMR_ALPF, &data->regs->tmr);
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return 0;
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err_tmu:
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iounmap(data->regs);
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err_iomap:
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platform_set_drvdata(pdev, NULL);
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return ret;
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}
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static int qoriq_tmu_remove(struct platform_device *pdev)
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{
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struct qoriq_tmu_data *data = platform_get_drvdata(pdev);
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thermal_zone_of_sensor_unregister(&pdev->dev, data->tz);
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/* Disable monitoring */
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tmu_write(data, TMR_DISABLE, &data->regs->tmr);
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iounmap(data->regs);
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platform_set_drvdata(pdev, NULL);
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return 0;
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}
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#ifdef CONFIG_PM_SLEEP
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static int qoriq_tmu_suspend(struct device *dev)
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{
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u32 tmr;
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struct qoriq_tmu_data *data = dev_get_drvdata(dev);
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/* Disable monitoring */
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tmr = tmu_read(data, &data->regs->tmr);
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tmr &= ~TMR_ME;
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tmu_write(data, tmr, &data->regs->tmr);
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return 0;
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}
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static int qoriq_tmu_resume(struct device *dev)
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{
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u32 tmr;
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struct qoriq_tmu_data *data = dev_get_drvdata(dev);
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/* Enable monitoring */
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tmr = tmu_read(data, &data->regs->tmr);
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tmr |= TMR_ME;
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tmu_write(data, tmr, &data->regs->tmr);
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return 0;
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}
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#endif
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static SIMPLE_DEV_PM_OPS(qoriq_tmu_pm_ops,
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qoriq_tmu_suspend, qoriq_tmu_resume);
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static const struct of_device_id qoriq_tmu_match[] = {
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{ .compatible = "fsl,qoriq-tmu", },
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{},
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};
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MODULE_DEVICE_TABLE(of, qoriq_tmu_match);
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static struct platform_driver qoriq_tmu = {
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.driver = {
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.name = "qoriq_thermal",
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.pm = &qoriq_tmu_pm_ops,
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.of_match_table = qoriq_tmu_match,
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},
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.probe = qoriq_tmu_probe,
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.remove = qoriq_tmu_remove,
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};
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module_platform_driver(qoriq_tmu);
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MODULE_AUTHOR("Jia Hongtao <hongtao.jia@nxp.com>");
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MODULE_DESCRIPTION("QorIQ Thermal Monitoring Unit driver");
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MODULE_LICENSE("GPL v2");
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