diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/thermal/broadcom/Kconfig | 41 | ||||
| -rw-r--r-- | drivers/thermal/broadcom/Makefile | 6 | ||||
| -rw-r--r-- | drivers/thermal/broadcom/bcm2711_thermal.c | 116 | ||||
| -rw-r--r-- | drivers/thermal/broadcom/bcm2835_thermal.c | 311 | ||||
| -rw-r--r-- | drivers/thermal/broadcom/brcmstb_thermal.c | 382 | ||||
| -rw-r--r-- | drivers/thermal/broadcom/ns-thermal.c | 95 | ||||
| -rw-r--r-- | drivers/thermal/broadcom/sr-thermal.c | 116 |
7 files changed, 1067 insertions, 0 deletions
diff --git a/drivers/thermal/broadcom/Kconfig b/drivers/thermal/broadcom/Kconfig new file mode 100644 index 000000000..061f1db6e --- /dev/null +++ b/drivers/thermal/broadcom/Kconfig @@ -0,0 +1,41 @@ +# SPDX-License-Identifier: GPL-2.0-only +config BCM2711_THERMAL + tristate "Broadcom AVS RO thermal sensor driver" + depends on ARCH_BCM2835 || COMPILE_TEST + depends on THERMAL_OF && MFD_SYSCON + help + Support for thermal sensors on Broadcom BCM2711 SoCs. + +config BCM2835_THERMAL + tristate "Thermal sensors on bcm2835 SoC" + depends on ARCH_BCM2835 || COMPILE_TEST + depends on HAS_IOMEM + depends on THERMAL_OF + help + Support for thermal sensors on Broadcom bcm2835 SoCs. + +config BRCMSTB_THERMAL + tristate "Broadcom STB AVS TMON thermal driver" + depends on ARCH_BRCMSTB || COMPILE_TEST + help + Enable this driver if you have a Broadcom STB SoC and would like + thermal framework support. + +config BCM_NS_THERMAL + tristate "Northstar thermal driver" + depends on ARCH_BCM_IPROC || COMPILE_TEST + default y if ARCH_BCM_IPROC + help + Support for the Northstar and Northstar Plus family of SoCs (e.g. + BCM4708, BCM4709, BCM5301x, BCM95852X, etc). It contains DMU (Device + Management Unit) block with a thermal sensor that allows checking CPU + temperature. + +config BCM_SR_THERMAL + tristate "Stingray thermal driver" + depends on ARCH_BCM_IPROC || COMPILE_TEST + default ARCH_BCM_IPROC + help + Support for the Stingray family of SoCs. Its different blocks like + iHost, CRMU and NITRO has thermal sensor that allows checking its + temperature. diff --git a/drivers/thermal/broadcom/Makefile b/drivers/thermal/broadcom/Makefile new file mode 100644 index 000000000..c917b243d --- /dev/null +++ b/drivers/thermal/broadcom/Makefile @@ -0,0 +1,6 @@ +# SPDX-License-Identifier: GPL-2.0-only +obj-$(CONFIG_BCM2711_THERMAL) += bcm2711_thermal.o +obj-$(CONFIG_BCM2835_THERMAL) += bcm2835_thermal.o +obj-$(CONFIG_BRCMSTB_THERMAL) += brcmstb_thermal.o +obj-$(CONFIG_BCM_NS_THERMAL) += ns-thermal.o +obj-$(CONFIG_BCM_SR_THERMAL) += sr-thermal.o diff --git a/drivers/thermal/broadcom/bcm2711_thermal.c b/drivers/thermal/broadcom/bcm2711_thermal.c new file mode 100644 index 000000000..1f8651d15 --- /dev/null +++ b/drivers/thermal/broadcom/bcm2711_thermal.c @@ -0,0 +1,116 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Broadcom AVS RO thermal sensor driver + * + * based on brcmstb_thermal + * + * Copyright (C) 2020 Stefan Wahren + */ + +#include <linux/bitops.h> +#include <linux/clk.h> +#include <linux/device.h> +#include <linux/err.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/mfd/syscon.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/of_device.h> +#include <linux/regmap.h> +#include <linux/thermal.h> + +#include "../thermal_hwmon.h" + +#define AVS_RO_TEMP_STATUS 0x200 +#define AVS_RO_TEMP_STATUS_VALID_MSK (BIT(16) | BIT(10)) +#define AVS_RO_TEMP_STATUS_DATA_MSK GENMASK(9, 0) + +struct bcm2711_thermal_priv { + struct regmap *regmap; + struct thermal_zone_device *thermal; +}; + +static int bcm2711_get_temp(struct thermal_zone_device *tz, int *temp) +{ + struct bcm2711_thermal_priv *priv = tz->devdata; + int slope = thermal_zone_get_slope(tz); + int offset = thermal_zone_get_offset(tz); + u32 val; + int ret; + + ret = regmap_read(priv->regmap, AVS_RO_TEMP_STATUS, &val); + if (ret) + return ret; + + if (!(val & AVS_RO_TEMP_STATUS_VALID_MSK)) + return -EIO; + + val &= AVS_RO_TEMP_STATUS_DATA_MSK; + + /* Convert a HW code to a temperature reading (millidegree celsius) */ + *temp = slope * val + offset; + + return 0; +} + +static const struct thermal_zone_device_ops bcm2711_thermal_of_ops = { + .get_temp = bcm2711_get_temp, +}; + +static const struct of_device_id bcm2711_thermal_id_table[] = { + { .compatible = "brcm,bcm2711-thermal" }, + {}, +}; +MODULE_DEVICE_TABLE(of, bcm2711_thermal_id_table); + +static int bcm2711_thermal_probe(struct platform_device *pdev) +{ + struct thermal_zone_device *thermal; + struct bcm2711_thermal_priv *priv; + struct device *dev = &pdev->dev; + struct device_node *parent; + struct regmap *regmap; + int ret; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + /* get regmap from syscon node */ + parent = of_get_parent(dev->of_node); /* parent should be syscon node */ + regmap = syscon_node_to_regmap(parent); + of_node_put(parent); + if (IS_ERR(regmap)) { + ret = PTR_ERR(regmap); + dev_err(dev, "failed to get regmap: %d\n", ret); + return ret; + } + priv->regmap = regmap; + + thermal = devm_thermal_of_zone_register(dev, 0, priv, + &bcm2711_thermal_of_ops); + if (IS_ERR(thermal)) { + ret = PTR_ERR(thermal); + dev_err(dev, "could not register sensor: %d\n", ret); + return ret; + } + + priv->thermal = thermal; + + thermal->tzp->no_hwmon = false; + return thermal_add_hwmon_sysfs(thermal); +} + +static struct platform_driver bcm2711_thermal_driver = { + .probe = bcm2711_thermal_probe, + .driver = { + .name = "bcm2711_thermal", + .of_match_table = bcm2711_thermal_id_table, + }, +}; +module_platform_driver(bcm2711_thermal_driver); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Stefan Wahren"); +MODULE_DESCRIPTION("Broadcom AVS RO thermal sensor driver"); diff --git a/drivers/thermal/broadcom/bcm2835_thermal.c b/drivers/thermal/broadcom/bcm2835_thermal.c new file mode 100644 index 000000000..2c67841a1 --- /dev/null +++ b/drivers/thermal/broadcom/bcm2835_thermal.c @@ -0,0 +1,311 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Driver for Broadcom BCM2835 SoC temperature sensor + * + * Copyright (C) 2016 Martin Sperl + */ + +#include <linux/clk.h> +#include <linux/debugfs.h> +#include <linux/device.h> +#include <linux/err.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include <linux/thermal.h> + +#include "../thermal_hwmon.h" + +#define BCM2835_TS_TSENSCTL 0x00 +#define BCM2835_TS_TSENSSTAT 0x04 + +#define BCM2835_TS_TSENSCTL_PRWDW BIT(0) +#define BCM2835_TS_TSENSCTL_RSTB BIT(1) + +/* + * bandgap reference voltage in 6 mV increments + * 000b = 1178 mV, 001b = 1184 mV, ... 111b = 1220 mV + */ +#define BCM2835_TS_TSENSCTL_CTRL_BITS 3 +#define BCM2835_TS_TSENSCTL_CTRL_SHIFT 2 +#define BCM2835_TS_TSENSCTL_CTRL_MASK \ + GENMASK(BCM2835_TS_TSENSCTL_CTRL_BITS + \ + BCM2835_TS_TSENSCTL_CTRL_SHIFT - 1, \ + BCM2835_TS_TSENSCTL_CTRL_SHIFT) +#define BCM2835_TS_TSENSCTL_CTRL_DEFAULT 1 +#define BCM2835_TS_TSENSCTL_EN_INT BIT(5) +#define BCM2835_TS_TSENSCTL_DIRECT BIT(6) +#define BCM2835_TS_TSENSCTL_CLR_INT BIT(7) +#define BCM2835_TS_TSENSCTL_THOLD_SHIFT 8 +#define BCM2835_TS_TSENSCTL_THOLD_BITS 10 +#define BCM2835_TS_TSENSCTL_THOLD_MASK \ + GENMASK(BCM2835_TS_TSENSCTL_THOLD_BITS + \ + BCM2835_TS_TSENSCTL_THOLD_SHIFT - 1, \ + BCM2835_TS_TSENSCTL_THOLD_SHIFT) +/* + * time how long the block to be asserted in reset + * which based on a clock counter (TSENS clock assumed) + */ +#define BCM2835_TS_TSENSCTL_RSTDELAY_SHIFT 18 +#define BCM2835_TS_TSENSCTL_RSTDELAY_BITS 8 +#define BCM2835_TS_TSENSCTL_REGULEN BIT(26) + +#define BCM2835_TS_TSENSSTAT_DATA_BITS 10 +#define BCM2835_TS_TSENSSTAT_DATA_SHIFT 0 +#define BCM2835_TS_TSENSSTAT_DATA_MASK \ + GENMASK(BCM2835_TS_TSENSSTAT_DATA_BITS + \ + BCM2835_TS_TSENSSTAT_DATA_SHIFT - 1, \ + BCM2835_TS_TSENSSTAT_DATA_SHIFT) +#define BCM2835_TS_TSENSSTAT_VALID BIT(10) +#define BCM2835_TS_TSENSSTAT_INTERRUPT BIT(11) + +struct bcm2835_thermal_data { + struct thermal_zone_device *tz; + void __iomem *regs; + struct clk *clk; + struct dentry *debugfsdir; +}; + +static int bcm2835_thermal_adc2temp(u32 adc, int offset, int slope) +{ + return offset + slope * adc; +} + +static int bcm2835_thermal_temp2adc(int temp, int offset, int slope) +{ + temp -= offset; + temp /= slope; + + if (temp < 0) + temp = 0; + if (temp >= BIT(BCM2835_TS_TSENSSTAT_DATA_BITS)) + temp = BIT(BCM2835_TS_TSENSSTAT_DATA_BITS) - 1; + + return temp; +} + +static int bcm2835_thermal_get_temp(struct thermal_zone_device *tz, int *temp) +{ + struct bcm2835_thermal_data *data = tz->devdata; + u32 val = readl(data->regs + BCM2835_TS_TSENSSTAT); + + if (!(val & BCM2835_TS_TSENSSTAT_VALID)) + return -EIO; + + val &= BCM2835_TS_TSENSSTAT_DATA_MASK; + + *temp = bcm2835_thermal_adc2temp( + val, + thermal_zone_get_offset(data->tz), + thermal_zone_get_slope(data->tz)); + + return 0; +} + +static const struct debugfs_reg32 bcm2835_thermal_regs[] = { + { + .name = "ctl", + .offset = 0 + }, + { + .name = "stat", + .offset = 4 + } +}; + +static void bcm2835_thermal_debugfs(struct platform_device *pdev) +{ + struct bcm2835_thermal_data *data = platform_get_drvdata(pdev); + struct debugfs_regset32 *regset; + + data->debugfsdir = debugfs_create_dir("bcm2835_thermal", NULL); + + regset = devm_kzalloc(&pdev->dev, sizeof(*regset), GFP_KERNEL); + if (!regset) + return; + + regset->regs = bcm2835_thermal_regs; + regset->nregs = ARRAY_SIZE(bcm2835_thermal_regs); + regset->base = data->regs; + + debugfs_create_regset32("regset", 0444, data->debugfsdir, regset); +} + +static const struct thermal_zone_device_ops bcm2835_thermal_ops = { + .get_temp = bcm2835_thermal_get_temp, +}; + +/* + * Note: as per Raspberry Foundation FAQ + * (https://www.raspberrypi.org/help/faqs/#performanceOperatingTemperature) + * the recommended temperature range for the SoC -40C to +85C + * so the trip limit is set to 80C. + * this applies to all the BCM283X SoC + */ + +static const struct of_device_id bcm2835_thermal_of_match_table[] = { + { + .compatible = "brcm,bcm2835-thermal", + }, + { + .compatible = "brcm,bcm2836-thermal", + }, + { + .compatible = "brcm,bcm2837-thermal", + }, + {}, +}; +MODULE_DEVICE_TABLE(of, bcm2835_thermal_of_match_table); + +static int bcm2835_thermal_probe(struct platform_device *pdev) +{ + const struct of_device_id *match; + struct thermal_zone_device *tz; + struct bcm2835_thermal_data *data; + struct resource *res; + int err = 0; + u32 val; + unsigned long rate; + + data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + match = of_match_device(bcm2835_thermal_of_match_table, + &pdev->dev); + if (!match) + return -EINVAL; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + data->regs = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(data->regs)) { + err = PTR_ERR(data->regs); + return err; + } + + data->clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(data->clk)) { + err = PTR_ERR(data->clk); + if (err != -EPROBE_DEFER) + dev_err(&pdev->dev, "Could not get clk: %d\n", err); + return err; + } + + err = clk_prepare_enable(data->clk); + if (err) + return err; + + rate = clk_get_rate(data->clk); + if ((rate < 1920000) || (rate > 5000000)) + dev_warn(&pdev->dev, + "Clock %pCn running at %lu Hz is outside of the recommended range: 1.92 to 5MHz\n", + data->clk, rate); + + /* register of thermal sensor and get info from DT */ + tz = devm_thermal_of_zone_register(&pdev->dev, 0, data, + &bcm2835_thermal_ops); + if (IS_ERR(tz)) { + err = PTR_ERR(tz); + dev_err(&pdev->dev, + "Failed to register the thermal device: %d\n", + err); + goto err_clk; + } + + /* + * right now the FW does set up the HW-block, so we are not + * touching the configuration registers. + * But if the HW is not enabled, then set it up + * using "sane" values used by the firmware right now. + */ + val = readl(data->regs + BCM2835_TS_TSENSCTL); + if (!(val & BCM2835_TS_TSENSCTL_RSTB)) { + int trip_temp, offset, slope; + + slope = thermal_zone_get_slope(tz); + offset = thermal_zone_get_offset(tz); + /* + * For now we deal only with critical, otherwise + * would need to iterate + */ + err = tz->ops->get_trip_temp(tz, 0, &trip_temp); + if (err < 0) { + dev_err(&pdev->dev, + "Not able to read trip_temp: %d\n", + err); + goto err_tz; + } + + /* set bandgap reference voltage and enable voltage regulator */ + val = (BCM2835_TS_TSENSCTL_CTRL_DEFAULT << + BCM2835_TS_TSENSCTL_CTRL_SHIFT) | + BCM2835_TS_TSENSCTL_REGULEN; + + /* use the recommended reset duration */ + val |= (0xFE << BCM2835_TS_TSENSCTL_RSTDELAY_SHIFT); + + /* trip_adc value from info */ + val |= bcm2835_thermal_temp2adc(trip_temp, + offset, + slope) + << BCM2835_TS_TSENSCTL_THOLD_SHIFT; + + /* write the value back to the register as 2 steps */ + writel(val, data->regs + BCM2835_TS_TSENSCTL); + val |= BCM2835_TS_TSENSCTL_RSTB; + writel(val, data->regs + BCM2835_TS_TSENSCTL); + } + + data->tz = tz; + + platform_set_drvdata(pdev, data); + + /* + * Thermal_zone doesn't enable hwmon as default, + * enable it here + */ + tz->tzp->no_hwmon = false; + err = thermal_add_hwmon_sysfs(tz); + if (err) + goto err_tz; + + bcm2835_thermal_debugfs(pdev); + + return 0; +err_tz: + thermal_of_zone_unregister(tz); +err_clk: + clk_disable_unprepare(data->clk); + + return err; +} + +static int bcm2835_thermal_remove(struct platform_device *pdev) +{ + struct bcm2835_thermal_data *data = platform_get_drvdata(pdev); + struct thermal_zone_device *tz = data->tz; + + debugfs_remove_recursive(data->debugfsdir); + thermal_of_zone_unregister(tz); + clk_disable_unprepare(data->clk); + + return 0; +} + +static struct platform_driver bcm2835_thermal_driver = { + .probe = bcm2835_thermal_probe, + .remove = bcm2835_thermal_remove, + .driver = { + .name = "bcm2835_thermal", + .of_match_table = bcm2835_thermal_of_match_table, + }, +}; +module_platform_driver(bcm2835_thermal_driver); + +MODULE_AUTHOR("Martin Sperl"); +MODULE_DESCRIPTION("Thermal driver for bcm2835 chip"); +MODULE_LICENSE("GPL"); diff --git a/drivers/thermal/broadcom/brcmstb_thermal.c b/drivers/thermal/broadcom/brcmstb_thermal.c new file mode 100644 index 000000000..c79c6cfdd --- /dev/null +++ b/drivers/thermal/broadcom/brcmstb_thermal.c @@ -0,0 +1,382 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Broadcom STB AVS TMON thermal sensor driver + * + * Copyright (c) 2015-2017 Broadcom + */ + +#define DRV_NAME "brcmstb_thermal" + +#define pr_fmt(fmt) DRV_NAME ": " fmt + +#include <linux/bitops.h> +#include <linux/device.h> +#include <linux/err.h> +#include <linux/io.h> +#include <linux/irqreturn.h> +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/of_device.h> +#include <linux/thermal.h> + +#define AVS_TMON_STATUS 0x00 + #define AVS_TMON_STATUS_valid_msk BIT(11) + #define AVS_TMON_STATUS_data_msk GENMASK(10, 1) + #define AVS_TMON_STATUS_data_shift 1 + +#define AVS_TMON_EN_OVERTEMP_RESET 0x04 + #define AVS_TMON_EN_OVERTEMP_RESET_msk BIT(0) + +#define AVS_TMON_RESET_THRESH 0x08 + #define AVS_TMON_RESET_THRESH_msk GENMASK(10, 1) + #define AVS_TMON_RESET_THRESH_shift 1 + +#define AVS_TMON_INT_IDLE_TIME 0x10 + +#define AVS_TMON_EN_TEMP_INT_SRCS 0x14 + #define AVS_TMON_EN_TEMP_INT_SRCS_high BIT(1) + #define AVS_TMON_EN_TEMP_INT_SRCS_low BIT(0) + +#define AVS_TMON_INT_THRESH 0x18 + #define AVS_TMON_INT_THRESH_high_msk GENMASK(26, 17) + #define AVS_TMON_INT_THRESH_high_shift 17 + #define AVS_TMON_INT_THRESH_low_msk GENMASK(10, 1) + #define AVS_TMON_INT_THRESH_low_shift 1 + +#define AVS_TMON_TEMP_INT_CODE 0x1c +#define AVS_TMON_TP_TEST_ENABLE 0x20 + +/* Default coefficients */ +#define AVS_TMON_TEMP_SLOPE 487 +#define AVS_TMON_TEMP_OFFSET 410040 + +/* HW related temperature constants */ +#define AVS_TMON_TEMP_MAX 0x3ff +#define AVS_TMON_TEMP_MIN -88161 +#define AVS_TMON_TEMP_MASK AVS_TMON_TEMP_MAX + +enum avs_tmon_trip_type { + TMON_TRIP_TYPE_LOW = 0, + TMON_TRIP_TYPE_HIGH, + TMON_TRIP_TYPE_RESET, + TMON_TRIP_TYPE_MAX, +}; + +struct avs_tmon_trip { + /* HW bit to enable the trip */ + u32 enable_offs; + u32 enable_mask; + + /* HW field to read the trip temperature */ + u32 reg_offs; + u32 reg_msk; + int reg_shift; +}; + +static struct avs_tmon_trip avs_tmon_trips[] = { + /* Trips when temperature is below threshold */ + [TMON_TRIP_TYPE_LOW] = { + .enable_offs = AVS_TMON_EN_TEMP_INT_SRCS, + .enable_mask = AVS_TMON_EN_TEMP_INT_SRCS_low, + .reg_offs = AVS_TMON_INT_THRESH, + .reg_msk = AVS_TMON_INT_THRESH_low_msk, + .reg_shift = AVS_TMON_INT_THRESH_low_shift, + }, + /* Trips when temperature is above threshold */ + [TMON_TRIP_TYPE_HIGH] = { + .enable_offs = AVS_TMON_EN_TEMP_INT_SRCS, + .enable_mask = AVS_TMON_EN_TEMP_INT_SRCS_high, + .reg_offs = AVS_TMON_INT_THRESH, + .reg_msk = AVS_TMON_INT_THRESH_high_msk, + .reg_shift = AVS_TMON_INT_THRESH_high_shift, + }, + /* Automatically resets chip when above threshold */ + [TMON_TRIP_TYPE_RESET] = { + .enable_offs = AVS_TMON_EN_OVERTEMP_RESET, + .enable_mask = AVS_TMON_EN_OVERTEMP_RESET_msk, + .reg_offs = AVS_TMON_RESET_THRESH, + .reg_msk = AVS_TMON_RESET_THRESH_msk, + .reg_shift = AVS_TMON_RESET_THRESH_shift, + }, +}; + +struct brcmstb_thermal_params { + unsigned int offset; + unsigned int mult; + const struct thermal_zone_device_ops *of_ops; +}; + +struct brcmstb_thermal_priv { + void __iomem *tmon_base; + struct device *dev; + struct thermal_zone_device *thermal; + /* Process specific thermal parameters used for calculations */ + const struct brcmstb_thermal_params *temp_params; +}; + +/* Convert a HW code to a temperature reading (millidegree celsius) */ +static inline int avs_tmon_code_to_temp(struct brcmstb_thermal_priv *priv, + u32 code) +{ + int offset = priv->temp_params->offset; + int mult = priv->temp_params->mult; + + return (offset - (int)((code & AVS_TMON_TEMP_MASK) * mult)); +} + +/* + * Convert a temperature value (millidegree celsius) to a HW code + * + * @temp: temperature to convert + * @low: if true, round toward the low side + */ +static inline u32 avs_tmon_temp_to_code(struct brcmstb_thermal_priv *priv, + int temp, bool low) +{ + int offset = priv->temp_params->offset; + int mult = priv->temp_params->mult; + + if (temp < AVS_TMON_TEMP_MIN) + return AVS_TMON_TEMP_MAX; /* Maximum code value */ + + if (temp >= offset) + return 0; /* Minimum code value */ + + if (low) + return (u32)(DIV_ROUND_UP(offset - temp, mult)); + else + return (u32)((offset - temp) / mult); +} + +static int brcmstb_get_temp(struct thermal_zone_device *tz, int *temp) +{ + struct brcmstb_thermal_priv *priv = tz->devdata; + u32 val; + long t; + + val = __raw_readl(priv->tmon_base + AVS_TMON_STATUS); + + if (!(val & AVS_TMON_STATUS_valid_msk)) { + dev_err(priv->dev, "reading not valid\n"); + return -EIO; + } + + val = (val & AVS_TMON_STATUS_data_msk) >> AVS_TMON_STATUS_data_shift; + + t = avs_tmon_code_to_temp(priv, val); + if (t < 0) + *temp = 0; + else + *temp = t; + + return 0; +} + +static void avs_tmon_trip_enable(struct brcmstb_thermal_priv *priv, + enum avs_tmon_trip_type type, int en) +{ + struct avs_tmon_trip *trip = &avs_tmon_trips[type]; + u32 val = __raw_readl(priv->tmon_base + trip->enable_offs); + + dev_dbg(priv->dev, "%sable trip, type %d\n", en ? "en" : "dis", type); + + if (en) + val |= trip->enable_mask; + else + val &= ~trip->enable_mask; + + __raw_writel(val, priv->tmon_base + trip->enable_offs); +} + +static int avs_tmon_get_trip_temp(struct brcmstb_thermal_priv *priv, + enum avs_tmon_trip_type type) +{ + struct avs_tmon_trip *trip = &avs_tmon_trips[type]; + u32 val = __raw_readl(priv->tmon_base + trip->reg_offs); + + val &= trip->reg_msk; + val >>= trip->reg_shift; + + return avs_tmon_code_to_temp(priv, val); +} + +static void avs_tmon_set_trip_temp(struct brcmstb_thermal_priv *priv, + enum avs_tmon_trip_type type, + int temp) +{ + struct avs_tmon_trip *trip = &avs_tmon_trips[type]; + u32 val, orig; + + dev_dbg(priv->dev, "set temp %d to %d\n", type, temp); + + /* round toward low temp for the low interrupt */ + val = avs_tmon_temp_to_code(priv, temp, + type == TMON_TRIP_TYPE_LOW); + + val <<= trip->reg_shift; + val &= trip->reg_msk; + + orig = __raw_readl(priv->tmon_base + trip->reg_offs); + orig &= ~trip->reg_msk; + orig |= val; + __raw_writel(orig, priv->tmon_base + trip->reg_offs); +} + +static int avs_tmon_get_intr_temp(struct brcmstb_thermal_priv *priv) +{ + u32 val; + + val = __raw_readl(priv->tmon_base + AVS_TMON_TEMP_INT_CODE); + return avs_tmon_code_to_temp(priv, val); +} + +static irqreturn_t brcmstb_tmon_irq_thread(int irq, void *data) +{ + struct brcmstb_thermal_priv *priv = data; + int low, high, intr; + + low = avs_tmon_get_trip_temp(priv, TMON_TRIP_TYPE_LOW); + high = avs_tmon_get_trip_temp(priv, TMON_TRIP_TYPE_HIGH); + intr = avs_tmon_get_intr_temp(priv); + + dev_dbg(priv->dev, "low/intr/high: %d/%d/%d\n", + low, intr, high); + + /* Disable high-temp until next threshold shift */ + if (intr >= high) + avs_tmon_trip_enable(priv, TMON_TRIP_TYPE_HIGH, 0); + /* Disable low-temp until next threshold shift */ + if (intr <= low) + avs_tmon_trip_enable(priv, TMON_TRIP_TYPE_LOW, 0); + + /* + * Notify using the interrupt temperature, in case the temperature + * changes before it can next be read out + */ + thermal_zone_device_update(priv->thermal, intr); + + return IRQ_HANDLED; +} + +static int brcmstb_set_trips(struct thermal_zone_device *tz, int low, int high) +{ + struct brcmstb_thermal_priv *priv = tz->devdata; + + dev_dbg(priv->dev, "set trips %d <--> %d\n", low, high); + + /* + * Disable low-temp if "low" is too small. As per thermal framework + * API, we use -INT_MAX rather than INT_MIN. + */ + if (low <= -INT_MAX) { + avs_tmon_trip_enable(priv, TMON_TRIP_TYPE_LOW, 0); + } else { + avs_tmon_set_trip_temp(priv, TMON_TRIP_TYPE_LOW, low); + avs_tmon_trip_enable(priv, TMON_TRIP_TYPE_LOW, 1); + } + + /* Disable high-temp if "high" is too big. */ + if (high == INT_MAX) { + avs_tmon_trip_enable(priv, TMON_TRIP_TYPE_HIGH, 0); + } else { + avs_tmon_set_trip_temp(priv, TMON_TRIP_TYPE_HIGH, high); + avs_tmon_trip_enable(priv, TMON_TRIP_TYPE_HIGH, 1); + } + + return 0; +} + +static const struct thermal_zone_device_ops brcmstb_16nm_of_ops = { + .get_temp = brcmstb_get_temp, +}; + +static const struct brcmstb_thermal_params brcmstb_16nm_params = { + .offset = 457829, + .mult = 557, + .of_ops = &brcmstb_16nm_of_ops, +}; + +static const struct thermal_zone_device_ops brcmstb_28nm_of_ops = { + .get_temp = brcmstb_get_temp, + .set_trips = brcmstb_set_trips, +}; + +static const struct brcmstb_thermal_params brcmstb_28nm_params = { + .offset = 410040, + .mult = 487, + .of_ops = &brcmstb_28nm_of_ops, +}; + +static const struct of_device_id brcmstb_thermal_id_table[] = { + { .compatible = "brcm,avs-tmon-bcm7216", .data = &brcmstb_16nm_params }, + { .compatible = "brcm,avs-tmon", .data = &brcmstb_28nm_params }, + {}, +}; +MODULE_DEVICE_TABLE(of, brcmstb_thermal_id_table); + +static int brcmstb_thermal_probe(struct platform_device *pdev) +{ + const struct thermal_zone_device_ops *of_ops; + struct thermal_zone_device *thermal; + struct brcmstb_thermal_priv *priv; + struct resource *res; + int irq, ret; + + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->temp_params = of_device_get_match_data(&pdev->dev); + if (!priv->temp_params) + return -EINVAL; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + priv->tmon_base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(priv->tmon_base)) + return PTR_ERR(priv->tmon_base); + + priv->dev = &pdev->dev; + platform_set_drvdata(pdev, priv); + of_ops = priv->temp_params->of_ops; + + thermal = devm_thermal_of_zone_register(&pdev->dev, 0, priv, + of_ops); + if (IS_ERR(thermal)) { + ret = PTR_ERR(thermal); + dev_err(&pdev->dev, "could not register sensor: %d\n", ret); + return ret; + } + + priv->thermal = thermal; + + irq = platform_get_irq_optional(pdev, 0); + if (irq >= 0) { + ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, + brcmstb_tmon_irq_thread, + IRQF_ONESHOT, + DRV_NAME, priv); + if (ret < 0) { + dev_err(&pdev->dev, "could not request IRQ: %d\n", ret); + return ret; + } + } + + dev_info(&pdev->dev, "registered AVS TMON of-sensor driver\n"); + + return 0; +} + +static struct platform_driver brcmstb_thermal_driver = { + .probe = brcmstb_thermal_probe, + .driver = { + .name = DRV_NAME, + .of_match_table = brcmstb_thermal_id_table, + }, +}; +module_platform_driver(brcmstb_thermal_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Brian Norris"); +MODULE_DESCRIPTION("Broadcom STB AVS TMON thermal driver"); diff --git a/drivers/thermal/broadcom/ns-thermal.c b/drivers/thermal/broadcom/ns-thermal.c new file mode 100644 index 000000000..07a8a3f49 --- /dev/null +++ b/drivers/thermal/broadcom/ns-thermal.c @@ -0,0 +1,95 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2017 Rafał Miłecki <rafal@milecki.pl> + */ + +#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 + +static int ns_thermal_get_temp(struct thermal_zone_device *tz, int *temp) +{ + void __iomem *pvtmon = tz->devdata; + int offset = thermal_zone_get_offset(tz); + int slope = thermal_zone_get_slope(tz); + u32 val; + + val = readl(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, pvtmon + PVTMON_CONTROL0); + } + + val = readl(pvtmon + PVTMON_STATUS); + *temp = slope * val + offset; + + return 0; +} + +static const struct thermal_zone_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 thermal_zone_device *tz; + void __iomem *pvtmon; + + pvtmon = of_iomap(dev_of_node(dev), 0); + if (WARN_ON(!pvtmon)) + return -ENOENT; + + tz = devm_thermal_of_zone_register(dev, 0, + pvtmon, + &ns_thermal_ops); + if (IS_ERR(tz)) { + iounmap(pvtmon); + return PTR_ERR(tz); + } + + platform_set_drvdata(pdev, pvtmon); + + return 0; +} + +static int ns_thermal_remove(struct platform_device *pdev) +{ + void __iomem *pvtmon = platform_get_drvdata(pdev); + + iounmap(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_AUTHOR("Rafał Miłecki <rafal@milecki.pl>"); +MODULE_DESCRIPTION("Northstar thermal driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/thermal/broadcom/sr-thermal.c b/drivers/thermal/broadcom/sr-thermal.c new file mode 100644 index 000000000..2b9350254 --- /dev/null +++ b/drivers/thermal/broadcom/sr-thermal.c @@ -0,0 +1,116 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2018 Broadcom + */ + +#include <linux/module.h> +#include <linux/of_address.h> +#include <linux/platform_device.h> +#include <linux/thermal.h> + +/* + * In stingray thermal IO memory, + * Total Number of available TMONs MASK is at offset 0 + * temperature registers BASE is at 4 byte offset. + * Each TMON temperature register size is 4. + */ +#define SR_TMON_TEMP_BASE(id) ((id) * 0x4) + +#define SR_TMON_MAX_LIST 6 + +struct sr_tmon { + unsigned int crit_temp; + unsigned int tmon_id; + struct sr_thermal *priv; +}; + +struct sr_thermal { + void __iomem *regs; + unsigned int max_crit_temp; + struct sr_tmon tmon[SR_TMON_MAX_LIST]; +}; + +static int sr_get_temp(struct thermal_zone_device *tz, int *temp) +{ + struct sr_tmon *tmon = tz->devdata; + struct sr_thermal *sr_thermal = tmon->priv; + + *temp = readl(sr_thermal->regs + SR_TMON_TEMP_BASE(tmon->tmon_id)); + + return 0; +} + +static const struct thermal_zone_device_ops sr_tz_ops = { + .get_temp = sr_get_temp, +}; + +static int sr_thermal_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct thermal_zone_device *tz; + struct sr_thermal *sr_thermal; + struct sr_tmon *tmon; + struct resource *res; + u32 sr_tmon_list = 0; + unsigned int i; + int ret; + + sr_thermal = devm_kzalloc(dev, sizeof(*sr_thermal), GFP_KERNEL); + if (!sr_thermal) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return -ENOENT; + + sr_thermal->regs = (void __iomem *)devm_memremap(&pdev->dev, res->start, + resource_size(res), + MEMREMAP_WB); + if (IS_ERR(sr_thermal->regs)) { + dev_err(dev, "failed to get io address\n"); + return PTR_ERR(sr_thermal->regs); + } + + ret = device_property_read_u32(dev, "brcm,tmon-mask", &sr_tmon_list); + if (ret) + return ret; + + tmon = sr_thermal->tmon; + for (i = 0; i < SR_TMON_MAX_LIST; i++, tmon++) { + if (!(sr_tmon_list & BIT(i))) + continue; + + /* Flush temperature registers */ + writel(0, sr_thermal->regs + SR_TMON_TEMP_BASE(i)); + tmon->tmon_id = i; + tmon->priv = sr_thermal; + tz = devm_thermal_of_zone_register(dev, i, tmon, + &sr_tz_ops); + if (IS_ERR(tz)) + return PTR_ERR(tz); + + dev_dbg(dev, "thermal sensor %d registered\n", i); + } + platform_set_drvdata(pdev, sr_thermal); + + return 0; +} + +static const struct of_device_id sr_thermal_of_match[] = { + { .compatible = "brcm,sr-thermal", }, + {}, +}; +MODULE_DEVICE_TABLE(of, sr_thermal_of_match); + +static struct platform_driver sr_thermal_driver = { + .probe = sr_thermal_probe, + .driver = { + .name = "sr-thermal", + .of_match_table = sr_thermal_of_match, + }, +}; +module_platform_driver(sr_thermal_driver); + +MODULE_AUTHOR("Pramod Kumar <pramod.kumar@broadcom.com>"); +MODULE_DESCRIPTION("Stingray thermal driver"); +MODULE_LICENSE("GPL v2"); |