* [PATCH 1/2] dt-bindings: thermal: add support for Raspberry Pi thermal
@ 2017-03-18 0:01 Rafał Miłecki
2017-03-18 0:01 ` [PATCH 2/2] thermal: broadcom: add Raspberry Pi thermal driver Rafał Miłecki
[not found] ` <20170318000132.9212-1-zajec5-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
0 siblings, 2 replies; 6+ messages in thread
From: Rafał Miłecki @ 2017-03-18 0:01 UTC (permalink / raw)
To: Zhang Rui, Eduardo Valentin
Cc: Mark Rutland, devicetree, Florian Fainelli, Scott Branden,
Stephen Warren, Ray Jui, linux-pm, Lee Jones, Eric Anholt,
Rob Herring, bcm-kernel-feedback-list, linux-rpi-kernel,
Rafał Miłecki, linux-arm-kernel
From: Rafał Miłecki <rafal@milecki.pl>
This commit documents binding for BCM2835 SoC thermal used in Raspberry
Pi devices.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
---
.../bindings/thermal/raspberrypi,bcm2835-thermal | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
create mode 100644 Documentation/devicetree/bindings/thermal/raspberrypi,bcm2835-thermal
diff --git a/Documentation/devicetree/bindings/thermal/raspberrypi,bcm2835-thermal b/Documentation/devicetree/bindings/thermal/raspberrypi,bcm2835-thermal
new file mode 100644
index 000000000000..fbffa9291ba9
--- /dev/null
+++ b/Documentation/devicetree/bindings/thermal/raspberrypi,bcm2835-thermal
@@ -0,0 +1,17 @@
+* Broadcom BCM2835 SoC Raspberry Pi Thermal
+
+This binding describes thermal sensor that is part of BCM2835 SoC.
+
+Required properties:
+- compatible : Must be "raspberrypi,bcm2835-thermal"
+- firmware : Reference to the Raspberry Pi firmware device node, see
+ raspberrypi,bcm2835-firmware for details
+- #thermal-sensor-cells : Should be <0>
+
+Example:
+
+thermal {
+ compatible = "raspberrypi,bcm2835-thermal";
+ firmware = <&firmware>;
+ #thermal-sensor-cells = <0>;
+};
--
2.11.0
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^ permalink raw reply related [flat|nested] 6+ messages in thread* [PATCH 2/2] thermal: broadcom: add Raspberry Pi thermal driver 2017-03-18 0:01 [PATCH 1/2] dt-bindings: thermal: add support for Raspberry Pi thermal Rafał Miłecki @ 2017-03-18 0:01 ` Rafał Miłecki [not found] ` <20170318000132.9212-1-zajec5-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> 1 sibling, 0 replies; 6+ messages in thread From: Rafał Miłecki @ 2017-03-18 0:01 UTC (permalink / raw) To: Zhang Rui, Eduardo Valentin Cc: Mark Rutland, devicetree, Florian Fainelli, Scott Branden, Stephen Warren, Ray Jui, linux-pm, Lee Jones, Eric Anholt, Rob Herring, bcm-kernel-feedback-list, linux-rpi-kernel, Rafał Miłecki, linux-arm-kernel From: Rafał Miłecki <rafal@milecki.pl> Raspberry Pi devices use BCM283[567] SoCs with a thermal device inside. Querying it is possible using Raspberry specific firmware interface. This simple driver allows reading SoC temperature. Signed-off-by: Rafał Miłecki <rafal@milecki.pl> --- drivers/thermal/Kconfig | 5 ++ drivers/thermal/Makefile | 1 + drivers/thermal/broadcom/Kconfig | 7 +++ drivers/thermal/broadcom/Makefile | 1 + drivers/thermal/broadcom/raspberrypi-thermal.c | 85 ++++++++++++++++++++++++++ 5 files changed, 99 insertions(+) create mode 100644 drivers/thermal/broadcom/Kconfig create mode 100644 drivers/thermal/broadcom/Makefile create mode 100644 drivers/thermal/broadcom/raspberrypi-thermal.c diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig index 776b34396144..008e173ec825 100644 --- a/drivers/thermal/Kconfig +++ b/drivers/thermal/Kconfig @@ -392,6 +392,11 @@ config MTK_THERMAL Enable this option if you want to have support for thermal management controller present in Mediatek SoCs +menu "Broadcom thermal drivers" +depends on ARCH_BCM || COMPILE_TEST +source "drivers/thermal/broadcom/Kconfig" +endmenu + menu "Texas Instruments thermal drivers" depends on ARCH_HAS_BANDGAP || COMPILE_TEST depends on HAS_IOMEM diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile index 7adae2029355..549d81b6363c 100644 --- a/drivers/thermal/Makefile +++ b/drivers/thermal/Makefile @@ -27,6 +27,7 @@ thermal_sys-$(CONFIG_CLOCK_THERMAL) += clock_cooling.o thermal_sys-$(CONFIG_DEVFREQ_THERMAL) += devfreq_cooling.o # platform thermal drivers +obj-y += broadcom/ obj-$(CONFIG_QCOM_SPMI_TEMP_ALARM) += qcom-spmi-temp-alarm.o obj-$(CONFIG_SPEAR_THERMAL) += spear_thermal.o obj-$(CONFIG_ROCKCHIP_THERMAL) += rockchip_thermal.o diff --git a/drivers/thermal/broadcom/Kconfig b/drivers/thermal/broadcom/Kconfig new file mode 100644 index 000000000000..03d52d1d1403 --- /dev/null +++ b/drivers/thermal/broadcom/Kconfig @@ -0,0 +1,7 @@ +config RASPBERRYPI_THERMAL + tristate "Raspberry Pi thermal driver" + depends on ARCH_BCM2835 || COMPILE_TEST + depends on RASPBERRYPI_FIRMWARE=y + help + This enables support for the RPi power domains which can be enabled + or disabled via the RPi firmware. diff --git a/drivers/thermal/broadcom/Makefile b/drivers/thermal/broadcom/Makefile new file mode 100644 index 000000000000..5ea7f8819b7d --- /dev/null +++ b/drivers/thermal/broadcom/Makefile @@ -0,0 +1 @@ +obj-$(CONFIG_RASPBERRYPI_THERMAL) += raspberrypi-thermal.o diff --git a/drivers/thermal/broadcom/raspberrypi-thermal.c b/drivers/thermal/broadcom/raspberrypi-thermal.c new file mode 100644 index 000000000000..d9c1db06f806 --- /dev/null +++ b/drivers/thermal/broadcom/raspberrypi-thermal.c @@ -0,0 +1,85 @@ +/* + * Copyright (C) 2017 Rafał Miłecki <rafal@milecki.pl> + * + * 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. + */ + +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/thermal.h> + +#include <soc/bcm2835/raspberrypi-firmware.h> + +struct rpi_thermal { + struct rpi_firmware *fw; +}; + +static int rpi_thermal_get_temp(void *data, int *temp) +{ + struct rpi_thermal *rpi_thermal = data; + struct { + u32 id; + u32 temp; + } tag_data = {}; + int err; + + err = rpi_firmware_property(rpi_thermal->fw, + RPI_FIRMWARE_GET_TEMPERATURE, + &tag_data, sizeof(tag_data)); + if (!err) + *temp = tag_data.temp; + + return err; +} + +const struct thermal_zone_of_device_ops rpi_thermal_ops = { + .get_temp = rpi_thermal_get_temp, +}; + +static int rpi_thermal_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct rpi_thermal *rpi_thermal; + struct device_node *fw_np; + struct thermal_zone_device *tzd; + + rpi_thermal = devm_kzalloc(dev, sizeof(*rpi_thermal), GFP_KERNEL); + if (!rpi_thermal) + return -ENOMEM; + + fw_np = of_parse_phandle(dev->of_node, "firmware", 0); + if (!fw_np) { + dev_err(dev, "Failed to get firmware phandle\n"); + return -ENOENT; + } + + rpi_thermal->fw = rpi_firmware_get(fw_np); + of_node_put(fw_np); + if (!rpi_thermal->fw) + return -ENODEV; + + tzd = devm_thermal_zone_of_sensor_register(dev, 0, rpi_thermal, + &rpi_thermal_ops); + + return PTR_ERR_OR_ZERO(tzd); +} + +static const struct of_device_id rpi_thermal_of_match[] = { + { .compatible = "raspberrypi,bcm2835-thermal", }, + {}, +}; +MODULE_DEVICE_TABLE(of, rpi_thermal_of_match); + +static struct platform_driver rpi_thermal_driver = { + .probe = rpi_thermal_probe, + .driver = { + .name = "raspberrypi-thermal", + .of_match_table = rpi_thermal_of_match, + }, +}; +module_platform_driver(rpi_thermal_driver); + +MODULE_DESCRIPTION("Raspberry Pi thermal driver"); +MODULE_LICENSE("GPL v2"); -- 2.11.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel ^ permalink raw reply related [flat|nested] 6+ messages in thread
[parent not found: <20170318000132.9212-1-zajec5-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]
* [PATCH V2 1/2] dt-bindings: thermal: add support for Raspberry Pi thermal [not found] ` <20170318000132.9212-1-zajec5-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> @ 2017-03-18 0:06 ` Rafał Miłecki [not found] ` <20170318000603.10158-1-zajec5-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> 2017-03-18 0:09 ` [PATCH 1/2] dt-bindings: thermal: add support for Raspberry Pi thermal Eric Anholt 1 sibling, 1 reply; 6+ messages in thread From: Rafał Miłecki @ 2017-03-18 0:06 UTC (permalink / raw) To: Zhang Rui, Eduardo Valentin Cc: Rob Herring, Mark Rutland, Stephen Warren, Lee Jones, Eric Anholt, Florian Fainelli, Ray Jui, Scott Branden, bcm-kernel-feedback-list-dY08KVG/lbpWk0Htik3J/w, linux-pm-u79uwXL29TY76Z2rM5mHXA, devicetree-u79uwXL29TY76Z2rM5mHXA, linux-rpi-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, Rafał Miłecki From: Rafał Miłecki <rafal-g1n6cQUeyibVItvQsEIGlw@public.gmane.org> This commit documents binding for BCM2835 SoC thermal used in Raspberry Pi devices. Signed-off-by: Rafał Miłecki <rafal-g1n6cQUeyibVItvQsEIGlw@public.gmane.org> --- .../bindings/thermal/raspberrypi,bcm2835-thermal | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) create mode 100644 Documentation/devicetree/bindings/thermal/raspberrypi,bcm2835-thermal diff --git a/Documentation/devicetree/bindings/thermal/raspberrypi,bcm2835-thermal b/Documentation/devicetree/bindings/thermal/raspberrypi,bcm2835-thermal new file mode 100644 index 000000000000..fbffa9291ba9 --- /dev/null +++ b/Documentation/devicetree/bindings/thermal/raspberrypi,bcm2835-thermal @@ -0,0 +1,17 @@ +* Broadcom BCM2835 SoC Raspberry Pi Thermal + +This binding describes thermal sensor that is part of BCM2835 SoC. + +Required properties: +- compatible : Must be "raspberrypi,bcm2835-thermal" +- firmware : Reference to the Raspberry Pi firmware device node, see + raspberrypi,bcm2835-firmware for details +- #thermal-sensor-cells : Should be <0> + +Example: + +thermal { + compatible = "raspberrypi,bcm2835-thermal"; + firmware = <&firmware>; + #thermal-sensor-cells = <0>; +}; -- 2.11.0 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply related [flat|nested] 6+ messages in thread
[parent not found: <20170318000603.10158-1-zajec5-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]
* [PATCH V2 2/2] thermal: broadcom: add Raspberry Pi thermal driver [not found] ` <20170318000603.10158-1-zajec5-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> @ 2017-03-18 0:06 ` Rafał Miłecki 0 siblings, 0 replies; 6+ messages in thread From: Rafał Miłecki @ 2017-03-18 0:06 UTC (permalink / raw) To: Zhang Rui, Eduardo Valentin Cc: Rob Herring, Mark Rutland, Stephen Warren, Lee Jones, Eric Anholt, Florian Fainelli, Ray Jui, Scott Branden, bcm-kernel-feedback-list-dY08KVG/lbpWk0Htik3J/w, linux-pm-u79uwXL29TY76Z2rM5mHXA, devicetree-u79uwXL29TY76Z2rM5mHXA, linux-rpi-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, Rafał Miłecki From: Rafał Miłecki <rafal-g1n6cQUeyibVItvQsEIGlw@public.gmane.org> Raspberry Pi devices use BCM283[567] SoCs with a thermal device inside. Querying it is possible using Raspberry specific firmware interface. This simple driver allows reading SoC temperature. Signed-off-by: Rafał Miłecki <rafal-g1n6cQUeyibVItvQsEIGlw@public.gmane.org> --- V2: Update Kconfig help message. I forgot to locally rebase & fixup before sending, sorry. --- drivers/thermal/Kconfig | 5 ++ drivers/thermal/Makefile | 1 + drivers/thermal/broadcom/Kconfig | 7 +++ drivers/thermal/broadcom/Makefile | 1 + drivers/thermal/broadcom/raspberrypi-thermal.c | 85 ++++++++++++++++++++++++++ 5 files changed, 99 insertions(+) create mode 100644 drivers/thermal/broadcom/Kconfig create mode 100644 drivers/thermal/broadcom/Makefile create mode 100644 drivers/thermal/broadcom/raspberrypi-thermal.c diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig index 776b34396144..008e173ec825 100644 --- a/drivers/thermal/Kconfig +++ b/drivers/thermal/Kconfig @@ -392,6 +392,11 @@ config MTK_THERMAL Enable this option if you want to have support for thermal management controller present in Mediatek SoCs +menu "Broadcom thermal drivers" +depends on ARCH_BCM || COMPILE_TEST +source "drivers/thermal/broadcom/Kconfig" +endmenu + menu "Texas Instruments thermal drivers" depends on ARCH_HAS_BANDGAP || COMPILE_TEST depends on HAS_IOMEM diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile index 7adae2029355..549d81b6363c 100644 --- a/drivers/thermal/Makefile +++ b/drivers/thermal/Makefile @@ -27,6 +27,7 @@ thermal_sys-$(CONFIG_CLOCK_THERMAL) += clock_cooling.o thermal_sys-$(CONFIG_DEVFREQ_THERMAL) += devfreq_cooling.o # platform thermal drivers +obj-y += broadcom/ obj-$(CONFIG_QCOM_SPMI_TEMP_ALARM) += qcom-spmi-temp-alarm.o obj-$(CONFIG_SPEAR_THERMAL) += spear_thermal.o obj-$(CONFIG_ROCKCHIP_THERMAL) += rockchip_thermal.o diff --git a/drivers/thermal/broadcom/Kconfig b/drivers/thermal/broadcom/Kconfig new file mode 100644 index 000000000000..2524b2ff16f6 --- /dev/null +++ b/drivers/thermal/broadcom/Kconfig @@ -0,0 +1,7 @@ +config RASPBERRYPI_THERMAL + tristate "Raspberry Pi thermal driver" + depends on ARCH_BCM2835 || COMPILE_TEST + depends on RASPBERRYPI_FIRMWARE=y + help + This enables support for the RPi thermal that is part of BCM2835 SoC + and can be accessed using firmware interface. diff --git a/drivers/thermal/broadcom/Makefile b/drivers/thermal/broadcom/Makefile new file mode 100644 index 000000000000..5ea7f8819b7d --- /dev/null +++ b/drivers/thermal/broadcom/Makefile @@ -0,0 +1 @@ +obj-$(CONFIG_RASPBERRYPI_THERMAL) += raspberrypi-thermal.o diff --git a/drivers/thermal/broadcom/raspberrypi-thermal.c b/drivers/thermal/broadcom/raspberrypi-thermal.c new file mode 100644 index 000000000000..d9c1db06f806 --- /dev/null +++ b/drivers/thermal/broadcom/raspberrypi-thermal.c @@ -0,0 +1,85 @@ +/* + * Copyright (C) 2017 Rafał Miłecki <rafal-g1n6cQUeyibVItvQsEIGlw@public.gmane.org> + * + * 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. + */ + +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/thermal.h> + +#include <soc/bcm2835/raspberrypi-firmware.h> + +struct rpi_thermal { + struct rpi_firmware *fw; +}; + +static int rpi_thermal_get_temp(void *data, int *temp) +{ + struct rpi_thermal *rpi_thermal = data; + struct { + u32 id; + u32 temp; + } tag_data = {}; + int err; + + err = rpi_firmware_property(rpi_thermal->fw, + RPI_FIRMWARE_GET_TEMPERATURE, + &tag_data, sizeof(tag_data)); + if (!err) + *temp = tag_data.temp; + + return err; +} + +const struct thermal_zone_of_device_ops rpi_thermal_ops = { + .get_temp = rpi_thermal_get_temp, +}; + +static int rpi_thermal_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct rpi_thermal *rpi_thermal; + struct device_node *fw_np; + struct thermal_zone_device *tzd; + + rpi_thermal = devm_kzalloc(dev, sizeof(*rpi_thermal), GFP_KERNEL); + if (!rpi_thermal) + return -ENOMEM; + + fw_np = of_parse_phandle(dev->of_node, "firmware", 0); + if (!fw_np) { + dev_err(dev, "Failed to get firmware phandle\n"); + return -ENOENT; + } + + rpi_thermal->fw = rpi_firmware_get(fw_np); + of_node_put(fw_np); + if (!rpi_thermal->fw) + return -ENODEV; + + tzd = devm_thermal_zone_of_sensor_register(dev, 0, rpi_thermal, + &rpi_thermal_ops); + + return PTR_ERR_OR_ZERO(tzd); +} + +static const struct of_device_id rpi_thermal_of_match[] = { + { .compatible = "raspberrypi,bcm2835-thermal", }, + {}, +}; +MODULE_DEVICE_TABLE(of, rpi_thermal_of_match); + +static struct platform_driver rpi_thermal_driver = { + .probe = rpi_thermal_probe, + .driver = { + .name = "raspberrypi-thermal", + .of_match_table = rpi_thermal_of_match, + }, +}; +module_platform_driver(rpi_thermal_driver); + +MODULE_DESCRIPTION("Raspberry Pi thermal driver"); +MODULE_LICENSE("GPL v2"); -- 2.11.0 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [PATCH 1/2] dt-bindings: thermal: add support for Raspberry Pi thermal [not found] ` <20170318000132.9212-1-zajec5-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> 2017-03-18 0:06 ` [PATCH V2 1/2] dt-bindings: thermal: add support for Raspberry Pi thermal Rafał Miłecki @ 2017-03-18 0:09 ` Eric Anholt 2017-03-18 8:58 ` Rafał Miłecki 1 sibling, 1 reply; 6+ messages in thread From: Eric Anholt @ 2017-03-18 0:09 UTC (permalink / raw) To: Rafał Miłecki, Zhang Rui, Eduardo Valentin Cc: Rob Herring, Mark Rutland, Stephen Warren, Lee Jones, Florian Fainelli, Ray Jui, Scott Branden, bcm-kernel-feedback-list-dY08KVG/lbpWk0Htik3J/w, linux-pm-u79uwXL29TY76Z2rM5mHXA, devicetree-u79uwXL29TY76Z2rM5mHXA, linux-rpi-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, Rafał Miłecki [-- Attachment #1: Type: text/plain, Size: 405 bytes --] Rafał Miłecki <zajec5-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> writes: > From: Rafał Miłecki <rafal-g1n6cQUeyibVItvQsEIGlw@public.gmane.org> > > This commit documents binding for BCM2835 SoC thermal used in Raspberry > Pi devices. There's already a native (non-firmware) thermal driver just waiting for the maintainer to merge it. https://www.spinics.net/lists/arm-kernel/msg566217.html [-- Attachment #2: signature.asc --] [-- Type: application/pgp-signature, Size: 832 bytes --] ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH 1/2] dt-bindings: thermal: add support for Raspberry Pi thermal 2017-03-18 0:09 ` [PATCH 1/2] dt-bindings: thermal: add support for Raspberry Pi thermal Eric Anholt @ 2017-03-18 8:58 ` Rafał Miłecki 0 siblings, 0 replies; 6+ messages in thread From: Rafał Miłecki @ 2017-03-18 8:58 UTC (permalink / raw) To: Eric Anholt Cc: Mark Rutland, devicetree@vger.kernel.org, Florian Fainelli, Scott Branden, Stephen Warren, Ray Jui, linux-pm, Lee Jones, Eduardo Valentin, Rob Herring, bcm-kernel-feedback-list, linux-rpi-kernel, Rafał Miłecki, Zhang Rui, linux-arm-kernel@lists.infradead.org On 18 March 2017 at 01:09, Eric Anholt <eric@anholt.net> wrote: > Rafał Miłecki <zajec5@gmail.com> writes: > >> From: Rafał Miłecki <rafal@milecki.pl> >> >> This commit documents binding for BCM2835 SoC thermal used in Raspberry >> Pi devices. > > There's already a native (non-firmware) thermal driver just waiting for > the maintainer to merge it. > > https://www.spinics.net/lists/arm-kernel/msg566217.html Oh my, you did a nice work there guys! Well, this patch can obviously be dropped. -- Rafał _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel ^ permalink raw reply [flat|nested] 6+ messages in thread
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2017-03-18 0:06 ` [PATCH V2 2/2] thermal: broadcom: add Raspberry Pi thermal driver Rafał Miłecki
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