From eb982001dbd8546f273f444868a1031cc78b4250 Mon Sep 17 00:00:00 2001 From: Eduardo Valentin Date: Wed, 15 May 2013 15:46:00 +0000 Subject: thermal: introduce TI SoC thermal driver This patch moves the ti-soc-thermal driver out of the staging tree to the thermal tree. Cc: Grant Likely Cc: Rob Herring Cc: Rob Landley Cc: Greg Kroah-Hartman Cc: Zhang Rui Cc: Eduardo Valentin Cc: J Keerthy Cc: Radhesh Fadnis Cc: Cyril Roelandt Cc: devicetree-discuss@lists.ozlabs.org Cc: linux-doc@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: devel@driverdev.osuosl.org Cc: linux-pm@vger.kernel.org Signed-off-by: Eduardo Valentin Signed-off-by: Zhang Rui --- .../devicetree/bindings/thermal/ti_soc_thermal.txt | 60 ++++++++++++++++++++++ 1 file changed, 60 insertions(+) create mode 100644 Documentation/devicetree/bindings/thermal/ti_soc_thermal.txt (limited to 'Documentation') diff --git a/Documentation/devicetree/bindings/thermal/ti_soc_thermal.txt b/Documentation/devicetree/bindings/thermal/ti_soc_thermal.txt new file mode 100644 index 000000000000..a4a33d1a0746 --- /dev/null +++ b/Documentation/devicetree/bindings/thermal/ti_soc_thermal.txt @@ -0,0 +1,60 @@ +* Texas Instrument OMAP SCM bandgap bindings + +In the System Control Module, OMAP supplies a voltage reference +and a temperature sensor feature that are gathered in the band +gap voltage and temperature sensor (VBGAPTS) module. The band +gap provides current and voltage reference for its internal +circuits and other analog IP blocks. The analog-to-digital +converter (ADC) produces an output value that is proportional +to the silicon temperature. + +Required properties: +- compatible : Should be: + - "ti,omap4430-bandgap" : for OMAP4430 bandgap + - "ti,omap4460-bandgap" : for OMAP4460 bandgap + - "ti,omap4470-bandgap" : for OMAP4470 bandgap + - "ti,omap5430-bandgap" : for OMAP5430 bandgap +- interrupts : this entry should indicate which interrupt line +the talert signal is routed to; +Specific: +- ti,tshut-gpio : this entry should be used to inform which GPIO +line the tshut signal is routed to; +- regs : this entry must also be specified and it is specific +to each bandgap version, because the mapping may change from +soc to soc, apart of depending on available features. + +Example: +OMAP4430: +bandgap { + reg = <0x4a002260 0x4 0x4a00232C 0x4>; + compatible = "ti,omap4430-bandgap"; +}; + +OMAP4460: +bandgap { + reg = <0x4a002260 0x4 + 0x4a00232C 0x4 + 0x4a002378 0x18>; + compatible = "ti,omap4460-bandgap"; + interrupts = <0 126 4>; /* talert */ + ti,tshut-gpio = <86>; +}; + +OMAP4470: +bandgap { + reg = <0x4a002260 0x4 + 0x4a00232C 0x4 + 0x4a002378 0x18>; + compatible = "ti,omap4470-bandgap"; + interrupts = <0 126 4>; /* talert */ + ti,tshut-gpio = <86>; +}; + +OMAP5430: +bandgap { + reg = <0x4a0021e0 0xc + 0x4a00232c 0xc + 0x4a002380 0x2c + 0x4a0023C0 0x3c>; + compatible = "ti,omap5430-bandgap"; +}; -- cgit v1.2.3 From 0c1569590a6f14130b3660241580036176dba718 Mon Sep 17 00:00:00 2001 From: Eduardo Valentin Date: Wed, 29 May 2013 15:07:40 +0000 Subject: thermal: ti-soc-thermal: update DT reference for OMAP5430 Add missing irq line for TALERT on DT entry for OMAP5430. Cc: linux-pm@vger.kernel.org Cc: Grant Likely Cc: Rob Herring Cc: Rob Landley Cc: Greg Kroah-Hartman Cc: Zhang Rui Cc: J Keerthy Cc: devicetree-discuss@lists.ozlabs.org Cc: linux-doc@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Eduardo Valentin Signed-off-by: Zhang Rui --- Documentation/devicetree/bindings/thermal/ti_soc_thermal.txt | 1 + 1 file changed, 1 insertion(+) (limited to 'Documentation') diff --git a/Documentation/devicetree/bindings/thermal/ti_soc_thermal.txt b/Documentation/devicetree/bindings/thermal/ti_soc_thermal.txt index a4a33d1a0746..1629652372b6 100644 --- a/Documentation/devicetree/bindings/thermal/ti_soc_thermal.txt +++ b/Documentation/devicetree/bindings/thermal/ti_soc_thermal.txt @@ -57,4 +57,5 @@ bandgap { 0x4a002380 0x2c 0x4a0023C0 0x3c>; compatible = "ti,omap5430-bandgap"; + interrupts = <0 126 4>; /* talert */ }; -- cgit v1.2.3 From ca0c711463565a8735b24f3b08310287adb6b4c9 Mon Sep 17 00:00:00 2001 From: Eduardo Valentin Date: Wed, 29 May 2013 15:07:46 +0000 Subject: thermal: ti-soc-thermal: add DT example for DRA752 chip Update documentation by adding an example for DRA752 on DT description. Cc: linux-pm@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: Grant Likely Cc: Rob Herring Cc: Rob Landley Cc: Greg Kroah-Hartman Cc: Zhang Rui Cc: J Keerthy Cc: devicetree-discuss@lists.ozlabs.org Cc: linux-doc@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Eduardo Valentin Signed-off-by: Zhang Rui --- Documentation/devicetree/bindings/thermal/ti_soc_thermal.txt | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'Documentation') diff --git a/Documentation/devicetree/bindings/thermal/ti_soc_thermal.txt b/Documentation/devicetree/bindings/thermal/ti_soc_thermal.txt index 1629652372b6..1953b33cad51 100644 --- a/Documentation/devicetree/bindings/thermal/ti_soc_thermal.txt +++ b/Documentation/devicetree/bindings/thermal/ti_soc_thermal.txt @@ -59,3 +59,15 @@ bandgap { compatible = "ti,omap5430-bandgap"; interrupts = <0 126 4>; /* talert */ }; + +DRA752: +bandgap { + reg = <0x4a0021e0 0xc + 0x4a00232c 0xc + 0x4a002380 0x2c + 0x4a0023C0 0x3c + 0x4a002564 0x8 + 0x4a002574 0x50>; + compatible = "ti,dra752-bandgap"; + interrupts = <0 126 4>; /* talert */ +}; -- cgit v1.2.3 From 23be63f48d928cd5a21db58f73c731357e895250 Mon Sep 17 00:00:00 2001 From: Srinivas Pandruvada Date: Fri, 17 May 2013 23:42:03 +0000 Subject: Thermal: Documentation for x86 package temperature thermal driver Added documentation describing details of the x86 package temperature thermal driver. Signed-off-by: Srinivas Pandruvada Signed-off-by: Zhang Rui --- Documentation/thermal/x86_pkg_temperature_thermal | 47 +++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 Documentation/thermal/x86_pkg_temperature_thermal (limited to 'Documentation') diff --git a/Documentation/thermal/x86_pkg_temperature_thermal b/Documentation/thermal/x86_pkg_temperature_thermal new file mode 100644 index 000000000000..17a3a4c0a0ca --- /dev/null +++ b/Documentation/thermal/x86_pkg_temperature_thermal @@ -0,0 +1,47 @@ +Kernel driver: x86_pkg_temp_thermal +=================== + +Supported chips: +* x86: with package level thermal management +(Verify using: CPUID.06H:EAX[bit 6] =1) + +Authors: Srinivas Pandruvada + +Reference +--- +Intel® 64 and IA-32 Architectures Software Developer’s Manual (Jan, 2013): +Chapter 14.6: PACKAGE LEVEL THERMAL MANAGEMENT + +Description +--------- + +This driver register CPU digital temperature package level sensor as a thermal +zone with maximum two user mode configurable trip points. Number of trip points +depends on the capability of the package. Once the trip point is violated, +user mode can receive notification via thermal notification mechanism and can +take any action to control temperature. + + +Threshold management +-------------------- +Each package will register as a thermal zone under /sys/class/thermal. +Example: +/sys/class/thermal/thermal_zone1 + +This contains two trip points: +- trip_point_0_temp +- trip_point_1_temp + +User can set any temperature between 0 to TJ-Max temperature. Temperature units +are in milli-degree Celsius. Refer to "Documentation/thermal/sysfs-api.txt" for +thermal sys-fs details. + +Any value other than 0 in these trip points, can trigger thermal notifications. +Setting 0, stops sending thermal notifications. + +Thermal notifications: To get kobject-uevent notifications, set the thermal zone +policy to "user_space". For example: echo -n "user_space" > policy + + + + -- cgit v1.2.3 From 57d1617137dd61825a3a7cebf61015f58afce510 Mon Sep 17 00:00:00 2001 From: Eduardo Valentin Date: Fri, 7 Jun 2013 11:11:53 -0400 Subject: thermal: ti-soc-thermal: use standard GPIO DT bindings This change updates the ti-soc-thermal driver to use standard GPIO DT bindings to read the GPIO number associated to thermal shutdown IRQ, in case the device features it. Previously, the code was using a specific DT bindings. As now OMAP supports the standard way to model GPIOs, there is no point in having a ti specific binding. Cc: Zhang Rui Cc: Grant Likely Cc: Rob Herring Cc: linux-pm@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: devicetree-discuss@lists.ozlabs.org Signed-off-by: Eduardo Valentin --- Documentation/devicetree/bindings/thermal/ti_soc_thermal.txt | 9 +++++---- drivers/thermal/ti-soc-thermal/ti-bandgap.c | 8 ++------ 2 files changed, 7 insertions(+), 10 deletions(-) (limited to 'Documentation') diff --git a/Documentation/devicetree/bindings/thermal/ti_soc_thermal.txt b/Documentation/devicetree/bindings/thermal/ti_soc_thermal.txt index 1953b33cad51..0c9222d27fae 100644 --- a/Documentation/devicetree/bindings/thermal/ti_soc_thermal.txt +++ b/Documentation/devicetree/bindings/thermal/ti_soc_thermal.txt @@ -17,8 +17,9 @@ Required properties: - interrupts : this entry should indicate which interrupt line the talert signal is routed to; Specific: -- ti,tshut-gpio : this entry should be used to inform which GPIO -line the tshut signal is routed to; +- gpios : this entry should be used to inform which GPIO +line the tshut signal is routed to. The informed GPIO will +be treated as an IRQ; - regs : this entry must also be specified and it is specific to each bandgap version, because the mapping may change from soc to soc, apart of depending on available features. @@ -37,7 +38,7 @@ bandgap { 0x4a002378 0x18>; compatible = "ti,omap4460-bandgap"; interrupts = <0 126 4>; /* talert */ - ti,tshut-gpio = <86>; + gpios = <&gpio3 22 0>; /* tshut */ }; OMAP4470: @@ -47,7 +48,7 @@ bandgap { 0x4a002378 0x18>; compatible = "ti,omap4470-bandgap"; interrupts = <0 126 4>; /* talert */ - ti,tshut-gpio = <86>; + gpios = <&gpio3 22 0>; /* tshut */ }; OMAP5430: diff --git a/drivers/thermal/ti-soc-thermal/ti-bandgap.c b/drivers/thermal/ti-soc-thermal/ti-bandgap.c index 7c0b3ebcf83a..9dfd47196e63 100644 --- a/drivers/thermal/ti-soc-thermal/ti-bandgap.c +++ b/drivers/thermal/ti-soc-thermal/ti-bandgap.c @@ -38,6 +38,7 @@ #include #include #include +#include #include #include "ti-bandgap.h" @@ -1129,7 +1130,6 @@ static struct ti_bandgap *ti_bandgap_build(struct platform_device *pdev) const struct of_device_id *of_id; struct ti_bandgap *bgp; struct resource *res; - u32 prop; int i; /* just for the sake */ @@ -1173,11 +1173,7 @@ static struct ti_bandgap *ti_bandgap_build(struct platform_device *pdev) } while (res); if (TI_BANDGAP_HAS(bgp, TSHUT)) { - if (of_property_read_u32(node, "ti,tshut-gpio", &prop) < 0) { - dev_err(&pdev->dev, "missing tshut gpio in device tree\n"); - return ERR_PTR(-EINVAL); - } - bgp->tshut_gpio = prop; + bgp->tshut_gpio = of_get_gpio(node, 0); if (!gpio_is_valid(bgp->tshut_gpio)) { dev_err(&pdev->dev, "invalid gpio for tshut (%d)\n", bgp->tshut_gpio); -- cgit v1.2.3