diff options
Diffstat (limited to 'drivers/thermal')
| -rw-r--r-- | drivers/thermal/Kconfig | 3 | ||||
| -rw-r--r-- | drivers/thermal/broadcom/Kconfig | 9 | ||||
| -rw-r--r-- | drivers/thermal/broadcom/Makefile | 1 | ||||
| -rw-r--r-- | drivers/thermal/broadcom/sr-thermal.c | 121 |
4 files changed, 133 insertions, 1 deletions
diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig index 30323426902e..b71a774367f6 100644 --- a/drivers/thermal/Kconfig +++ b/drivers/thermal/Kconfig @@ -343,7 +343,8 @@ source "drivers/thermal/intel/Kconfig" endmenu menu "Broadcom thermal drivers" -depends on ARCH_BCM || ARCH_BRCMSTB || ARCH_BCM2835 || COMPILE_TEST +depends on ARCH_BCM || ARCH_BRCMSTB || ARCH_BCM2835 || ARCH_BCM_IPROC || \ + COMPILE_TEST source "drivers/thermal/broadcom/Kconfig" endmenu diff --git a/drivers/thermal/broadcom/Kconfig b/drivers/thermal/broadcom/Kconfig index c106a15bf7f9..dc9a9bdde3ed 100644 --- a/drivers/thermal/broadcom/Kconfig +++ b/drivers/thermal/broadcom/Kconfig @@ -22,3 +22,12 @@ config BCM_NS_THERMAL 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 index fae10ecafaef..79df69eb2b8c 100644 --- a/drivers/thermal/broadcom/Makefile +++ b/drivers/thermal/broadcom/Makefile @@ -1,3 +1,4 @@ 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/sr-thermal.c b/drivers/thermal/broadcom/sr-thermal.c new file mode 100644 index 000000000000..2284cbecedf3 --- /dev/null +++ b/drivers/thermal/broadcom/sr-thermal.c @@ -0,0 +1,121 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2018 Broadcom + */ + +#include <linux/acpi.h> +#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 { + struct thermal_zone_device *tz; + 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(void *data, int *temp) +{ + struct sr_tmon *tmon = data; + 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_of_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 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); + 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; + tmon->tz = devm_thermal_zone_of_sensor_register(dev, i, tmon, + &sr_tz_ops); + if (IS_ERR(tmon->tz)) + return PTR_ERR(tmon->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 const struct acpi_device_id sr_thermal_acpi_ids[] = { + { .id = "BRCM0500" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(acpi, sr_thermal_acpi_ids); + +static struct platform_driver sr_thermal_driver = { + .probe = sr_thermal_probe, + .driver = { + .name = "sr-thermal", + .of_match_table = sr_thermal_of_match, + .acpi_match_table = ACPI_PTR(sr_thermal_acpi_ids), + }, +}; +module_platform_driver(sr_thermal_driver); + +MODULE_AUTHOR("Pramod Kumar <pramod.kumar@broadcom.com>"); +MODULE_DESCRIPTION("Stingray thermal driver"); +MODULE_LICENSE("GPL v2"); |