thermal: add brcmstb AVS TMON driver

From: Markus Mayer <[email protected]>

This series adds the brcmstb AVS TMON driver.

The driver was originally written by Brian Norris.

This series is also available at
https://github.com/mmayer/linux/tree/brcmstb-thermal-4.13-v4.

v1 of this series can be found at https://lkml.org/lkml/2017/6/5/921
v2 of this series can be found at https://lkml.org/lkml/2017/7/21/585
v3 of this series can be found at https://lkml.org/lkml/2017/7/31/710

Changes since v3:
- Rebased on v4.13-rc3 to resolve conflicts in the MAINTAINERS file

Changes since v2:
- replaced calls to pr_debug() with calls to dev_dbg() [PATCH 2/4 only]
- all other patches are unchanged from v2

Changes since v1:
- Fixed wording in binding document
- Fixed lincensing to consistently mention GPL v2
- Use thermal_zone_get_slope() and thermal_zone_get_offset()
- Some minor clean-ups

Brian Norris (2):
Documentation: devicetree: add binding for Broadcom STB AVS TMON
thermal: add brcmstb AVS TMON driver

Markus Mayer (2):
ARM: multi_v7_defconfig: add CONFIG_BRCMSTB_THERMAL
arm64: defconfig: add CONFIG_BRCMSTB_THERMAL

 .../devicetree/bindings/thermal/brcm,avs-tmon.txt  |  20 ++
 MAINTAINERS                                        |   8 +
 arch/arm/configs/multi_v7_defconfig                |   1 +
 arch/arm64/configs/defconfig                       |   1 +
 drivers/thermal/Kconfig                            |   2 +-
 drivers/thermal/broadcom/Kconfig                   |   7 +
 drivers/thermal/broadcom/Makefile                  |   1 +
 drivers/thermal/broadcom/brcmstb_thermal.c         | 386 +++++++++++++++++++++
 8 files changed, 425 insertions(+), 1 deletion(-)
 create mode 100644 Documentation/devicetree/bindings/thermal/brcm,avs-tmon.txt
 create mode 100644 drivers/thermal/broadcom/brcmstb_thermal.c

2.7.4

From: Brian Norris <[email protected]>

Add binding for Broadcom STB thermal.

---
 .../devicetree/bindings/thermal/brcm,avs-tmon.txt    | 20 ++++++++++++++++++++
 MAINTAINERS                                          |  8 ++++++++
 2 files changed, 28 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/thermal/brcm,avs-tmon.txt

new file mode 100644
index 0000000..9d43553
@@ -0,0 +1,20 @@
+* Broadcom STB thermal management
+
+Thermal management core, provided by the AVS TMON hardware block.
+
+Required properties:
+- compatible: must be "brcm,avs-tmon" and/or "brcm,avs-tmon-bcm7445"
+- reg: address range for the AVS TMON registers
+- interrupts: temperature monitor interrupt, for high/low threshold triggers
+- interrupt-names: should be "tmon"
+- interrupt-parent: the parent interrupt controller
+
+Example:
+
+	thermal at f04d1500 {
+		compatible = "brcm,avs-tmon-bcm7445", "brcm,avs-tmon";
+		reg = <0xf04d1500 0x28>;
+		interrupts = <0x6>;
+		interrupt-names = "tmon";
+		interrupt-parent = <&avs_host_l2_intc>;
+	};

index f66488d..2f116a8 100644
@@ -2903,6 +2903,14 @@ S:	Maintained
 F:	Documentation/devicetree/bindings/cpufreq/brcm,stb-avs-cpu-freq.txt
 F:	drivers/cpufreq/brcmstb*
 
+BROADCOM STB AVS TMON DRIVER
+M:	Markus Mayer <[email protected]>
+M:	bcm-kernel-feedback-list at broadcom.com
+L:	linux-pm at vger.kernel.org
+S:	Maintained
+F:	Documentation/devicetree/bindings/thermal/brcm,avs-tmon.txt
+F:	drivers/thermal/broadcom/brcmstb*
+
 BROADCOM STB NAND FLASH DRIVER
 M:	Brian Norris <[email protected]>
 M:	Kamal Dasu <[email protected]>

2.7.4

From: Brian Norris <[email protected]>

The AVS TMON core provides temperature readings, a pair of configurable high- and low-temperature threshold interrupts, and an emergency over-temperature chip reset. The driver utilizes the first two to provide temperature readings and high-temperature notifications to applications. The over-temperature reset is not exposed to applications; this reset threshold is critical to the system and should be set with care within the bootloader.

Applications may choose to utilize the notification mechanism, the temperature reading mechanism (e.g., through polling), or both.

---
 drivers/thermal/Kconfig                    |   2 +-
 drivers/thermal/broadcom/Kconfig           |   7 +
 drivers/thermal/broadcom/Makefile          |   1 +
 drivers/thermal/broadcom/brcmstb_thermal.c | 386 +++++++++++++++++++++++++++++
 4 files changed, 395 insertions(+), 1 deletion(-)
 create mode 100644 drivers/thermal/broadcom/brcmstb_thermal.c

index b5b5fac..396ad6b 100644
@@ -408,7 +408,7 @@ config MTK_THERMAL
 	  controller present in Mediatek SoCs
 
 menu "Broadcom thermal drivers"
-depends on ARCH_BCM || COMPILE_TEST
+depends on ARCH_BCM || ARCH_BRCMSTB || COMPILE_TEST
 source "drivers/thermal/broadcom/Kconfig"
 endmenu
 

index 42c098e..c106a15 100644
@@ -6,6 +6,13 @@ config BCM2835_THERMAL
 	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

index c6f62e4..fae10ec 100644
@@ -1,2 +1,3 @@
 obj-$(CONFIG_BCM2835_THERMAL)		+= bcm2835_thermal.o
+obj-$(CONFIG_BRCMSTB_THERMAL)		+= brcmstb_thermal.o
 obj-$(CONFIG_BCM_NS_THERMAL)		+= ns-thermal.o

2.7.4

From: Markus Mayer <[email protected]>

Turn on CONFIG_BRCMSTB_THERMAL as module.

---
 arch/arm/configs/multi_v7_defconfig | 1 +
 1 file changed, 1 insertion(+)

index 4d19c1b..230f7fa 100644
@@ -455,6 +455,7 @@ CONFIG_SENSORS_NTC_THERMISTOR=m
 CONFIG_SENSORS_PWM_FAN=m
 CONFIG_SENSORS_INA2XX=m
 CONFIG_CPU_THERMAL=y
+CONFIG_BRCMSTB_THERMAL=m
 CONFIG_ROCKCHIP_THERMAL=y
 CONFIG_RCAR_THERMAL=y
 CONFIG_ARMADA_THERMAL=y

2.7.4

From: Markus Mayer <[email protected]>

Turn on CONFIG_BRCMSTB_THERMAL as module.

---
 arch/arm64/configs/defconfig | 1 +
 1 file changed, 1 insertion(+)

index 6c7d147..2449064 100644
@@ -304,6 +304,7 @@ CONFIG_SENSORS_INA2XX=m
 CONFIG_THERMAL_GOV_POWER_ALLOCATOR=y
 CONFIG_CPU_THERMAL=y
 CONFIG_THERMAL_EMULATION=y
+CONFIG_BRCMSTB_THERMAL=m
 CONFIG_EXYNOS_THERMAL=y
 CONFIG_ROCKCHIP_THERMAL=m
 CONFIG_WATCHDOG=y

2.7.4