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kernel/ARM-Enable-thermal-support-for-Raspberry-Pi-4.patch
Peter Robinson 8ddc9d3afe arm device enablement patches
2019-12-13 06:22:02 +00:00

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From: Stefan Wahren <wahrenst@gmx.net>
To: Zhang Rui <rui.zhang@intel.com>, Eduardo Valentin <edubezval@gmail.com>,
Daniel Lezcano <daniel.lezcano@linaro.org>,
Amit Kucheria <amit.kucheria@verdurent.com>,
Rob Herring <robh+dt@kernel.org>, Mark Rutland <mark.rutland@arm.com>,
Eric Anholt <eric@anholt.net>, Florian Fainelli <f.fainelli@gmail.com>,
Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org>,
Markus Mayer <mmayer@broadcom.com>
Subject: [PATCH 1/4] dt-bindings: Add BCM2711 thermal
Date: Fri, 1 Nov 2019 14:42:26 +0100
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Cc: devicetree@vger.kernel.org, linux-pm@vger.kernel.org,
bcm-kernel-feedback-list@broadcom.com, Stefan Wahren <wahrenst@gmx.net>,
Chen-Yu Tsai <wens@kernel.org>, linux-arm-kernel@lists.infradead.org
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Since the BCM2711 doesn't have a AVS TMON block, the thermal information
must be retrieved from the AVS ring oscillator block. So add a new
suitable binding.
Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
---
.../bindings/thermal/brcm,bcm2711-thermal.txt | 39 ++++++++++++++++++++++
1 file changed, 39 insertions(+)
create mode 100644 Documentation/devicetree/bindings/thermal/brcm,bcm2711-thermal.txt
--
2.7.4
diff --git a/Documentation/devicetree/bindings/thermal/brcm,bcm2711-thermal.txt b/Documentation/devicetree/bindings/thermal/brcm,bcm2711-thermal.txt
new file mode 100644
index 0000000..5531d3f
--- /dev/null
+++ b/Documentation/devicetree/bindings/thermal/brcm,bcm2711-thermal.txt
@@ -0,0 +1,39 @@
+Binding for Thermal Sensor driver for BCM2711 SoCs.
+
+Required properties:
+- compatible: must be: "brcm,bcm2711-thermal"
+- reg: Address range of the thermal registers.
+- clocks: Phandle of the clock used by the thermal sensor.
+- #thermal-sensor-cells: should be 0 (see thermal.txt)
+
+Example:
+
+thermal-zones {
+ cpu_thermal: cpu-thermal {
+ polling-delay-passive = <0>;
+ polling-delay = <1000>;
+
+ thermal-sensors = <&thermal>;
+
+ trips {
+ cpu-crit {
+ temperature = <80000>;
+ hysteresis = <0>;
+ type = "critical";
+ };
+ };
+
+ coefficients = <(-487) 410040>;
+
+ cooling-maps {
+ };
+ };
+};
+
+thermal@7d5d2200 {
+ compatible = "brcm,bcm2711-thermal";
+ reg = <0x7d5d2200 0x4>;
+ clocks = <&clocks BCM2835_CLOCK_TSENS>;
+ #thermal-sensor-cells = <0>;
+};
+
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1MGz1f-1iE6jl2up9-00E5nH; Fri, 01 Nov 2019 14:43:10 +0100
From: Stefan Wahren <wahrenst@gmx.net>
To: Zhang Rui <rui.zhang@intel.com>, Eduardo Valentin <edubezval@gmail.com>,
Daniel Lezcano <daniel.lezcano@linaro.org>,
Amit Kucheria <amit.kucheria@verdurent.com>,
Rob Herring <robh+dt@kernel.org>, Mark Rutland <mark.rutland@arm.com>,
Eric Anholt <eric@anholt.net>, Florian Fainelli <f.fainelli@gmail.com>,
Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org>,
Markus Mayer <mmayer@broadcom.com>
Subject: [PATCH 2/4] thermal: Add BCM2711 thermal driver
Date: Fri, 1 Nov 2019 14:42:27 +0100
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Cc: devicetree@vger.kernel.org, linux-pm@vger.kernel.org,
bcm-kernel-feedback-list@broadcom.com, Stefan Wahren <wahrenst@gmx.net>,
Chen-Yu Tsai <wens@kernel.org>, linux-arm-kernel@lists.infradead.org
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This adds the thermal sensor driver for the Broadcom BCM2711 SoC,
which is placed on the Raspberry Pi 4. The driver only provides
SoC temperature reading so far.
Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
---
drivers/thermal/broadcom/Kconfig | 8 ++
drivers/thermal/broadcom/Makefile | 1 +
drivers/thermal/broadcom/bcm2711_thermal.c | 146 +++++++++++++++++++++++++++++
3 files changed, 155 insertions(+)
create mode 100644 drivers/thermal/broadcom/bcm2711_thermal.c
--
2.7.4
diff --git a/drivers/thermal/broadcom/Kconfig b/drivers/thermal/broadcom/Kconfig
index cf43e15..b970295 100644
--- a/drivers/thermal/broadcom/Kconfig
+++ b/drivers/thermal/broadcom/Kconfig
@@ -1,4 +1,12 @@
# 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 HAS_IOMEM
+ depends on THERMAL_OF
+ help
+ Support for thermal sensors on Broadcom BCM2711 SoCs.
+
config BCM2835_THERMAL
tristate "Thermal sensors on bcm2835 SoC"
depends on ARCH_BCM2835 || COMPILE_TEST
diff --git a/drivers/thermal/broadcom/Makefile b/drivers/thermal/broadcom/Makefile
index 490ab1f..c917b24 100644
--- a/drivers/thermal/broadcom/Makefile
+++ b/drivers/thermal/broadcom/Makefile
@@ -1,4 +1,5 @@
# 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
diff --git a/drivers/thermal/broadcom/bcm2711_thermal.c b/drivers/thermal/broadcom/bcm2711_thermal.c
new file mode 100644
index 0000000..214a305
--- /dev/null
+++ b/drivers/thermal/broadcom/bcm2711_thermal.c
@@ -0,0 +1,146 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Broadcom AVS RO thermal sensor driver
+ *
+ * based on brcmstb_thermal
+ *
+ * Copyright (C) 2019 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/module.h>
+#include <linux/platform_device.h>
+#include <linux/of_device.h>
+#include <linux/thermal.h>
+
+#include "../thermal_hwmon.h"
+
+#define AVS_RO_TEMP_STATUS 0x00
+ #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 {
+ void __iomem *base;
+ struct device *dev;
+ struct clk *clk;
+ struct thermal_zone_device *thermal;
+};
+
+static int bcm2711_get_temp(void *data, int *temp)
+{
+ struct bcm2711_thermal_priv *priv = data;
+ int slope = thermal_zone_get_slope(priv->thermal);
+ int offset = thermal_zone_get_offset(priv->thermal);
+ u32 val;
+ long t;
+
+ val = __raw_readl(priv->base + AVS_RO_TEMP_STATUS);
+
+ if (!(val & AVS_RO_TEMP_STATUS_valid_msk)) {
+ dev_err(priv->dev, "reading not valid\n");
+ return -EIO;
+ }
+
+ val &= AVS_RO_TEMP_STATUS_data_msk;
+
+ /* Convert a HW code to a temperature reading (millidegree celsius) */
+ t = slope * val + offset;
+ if (t < 0)
+ *temp = 0;
+ else
+ *temp = t;
+
+ return 0;
+}
+
+static const struct thermal_zone_of_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 resource *res;
+ int ret;
+
+ priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ priv->base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(priv->base))
+ return PTR_ERR(priv->base);
+
+ priv->clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(priv->clk)) {
+ ret = PTR_ERR(priv->clk);
+ if (ret != -EPROBE_DEFER)
+ dev_err(&pdev->dev, "could not get clk: %d\n", ret);
+ return ret;
+ }
+
+ ret = clk_prepare_enable(priv->clk);
+ if (ret)
+ return ret;
+
+ priv->dev = &pdev->dev;
+ platform_set_drvdata(pdev, priv);
+
+ thermal = devm_thermal_zone_of_sensor_register(&pdev->dev, 0, priv,
+ &bcm2711_thermal_of_ops);
+ if (IS_ERR(thermal)) {
+ ret = PTR_ERR(thermal);
+ dev_err(&pdev->dev, "could not register sensor: %d\n", ret);
+ goto err_clk;
+ }
+
+ priv->thermal = thermal;
+
+ thermal->tzp->no_hwmon = false;
+ ret = thermal_add_hwmon_sysfs(thermal);
+ if (ret)
+ return ret;
+
+ return 0;
+
+err_clk:
+ clk_disable_unprepare(priv->clk);
+
+ return ret;
+}
+
+static int bcm2711_thermal_remove(struct platform_device *pdev)
+{
+ struct bcm2711_thermal_priv *priv = platform_get_drvdata(pdev);
+
+ clk_disable_unprepare(priv->clk);
+
+ return 0;
+}
+
+static struct platform_driver bcm2711_thermal_driver = {
+ .probe = bcm2711_thermal_probe,
+ .remove = bcm2711_thermal_remove,
+ .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");
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From: Stefan Wahren <wahrenst@gmx.net>
To: Zhang Rui <rui.zhang@intel.com>, Eduardo Valentin <edubezval@gmail.com>,
Daniel Lezcano <daniel.lezcano@linaro.org>,
Amit Kucheria <amit.kucheria@verdurent.com>,
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Eric Anholt <eric@anholt.net>, Florian Fainelli <f.fainelli@gmail.com>,
Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org>,
Markus Mayer <mmayer@broadcom.com>
Subject: [PATCH 3/4] ARM: dts: bcm2711: Enable thermal
Date: Fri, 1 Nov 2019 14:42:28 +0100
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Cc: devicetree@vger.kernel.org, linux-pm@vger.kernel.org,
bcm-kernel-feedback-list@broadcom.com, Stefan Wahren <wahrenst@gmx.net>,
Chen-Yu Tsai <wens@kernel.org>, linux-arm-kernel@lists.infradead.org
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This enables thermal for the BCM2711 and the Raspberry Pi 4.
Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
---
arch/arm/boot/dts/bcm2711.dtsi | 9 +++++++++
1 file changed, 9 insertions(+)
--
2.7.4
diff --git a/arch/arm/boot/dts/bcm2711.dtsi b/arch/arm/boot/dts/bcm2711.dtsi
index ac83dac..950e43f 100644
--- a/arch/arm/boot/dts/bcm2711.dtsi
+++ b/arch/arm/boot/dts/bcm2711.dtsi
@@ -46,6 +46,14 @@
IRQ_TYPE_LEVEL_HIGH)>;
};
+ thermal: thermal@7d5d2200 {
+ compatible = "brcm,bcm2711-thermal";
+ reg = <0x7d5d2200 0x4>;
+ clocks = <&clocks BCM2835_CLOCK_TSENS>;
+ #thermal-sensor-cells = <0>;
+ status = "okay";
+ };
+
dma: dma@7e007000 {
compatible = "brcm,bcm2835-dma";
reg = <0x7e007000 0xb00>;
@@ -317,6 +325,7 @@
&cpu_thermal {
coefficients = <(-487) 410040>;
+ thermal-sensors = <&thermal>;
};
&dsi0 {
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From: Stefan Wahren <wahrenst@gmx.net>
To: Zhang Rui <rui.zhang@intel.com>, Eduardo Valentin <edubezval@gmail.com>,
Daniel Lezcano <daniel.lezcano@linaro.org>,
Amit Kucheria <amit.kucheria@verdurent.com>,
Rob Herring <robh+dt@kernel.org>, Mark Rutland <mark.rutland@arm.com>,
Eric Anholt <eric@anholt.net>, Florian Fainelli <f.fainelli@gmail.com>,
Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org>,
Markus Mayer <mmayer@broadcom.com>
Subject: [PATCH 4/4] ARM: configs: Build BCM2711 thermal as module
Date: Fri, 1 Nov 2019 14:42:29 +0100
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Cc: devicetree@vger.kernel.org, linux-pm@vger.kernel.org,
bcm-kernel-feedback-list@broadcom.com, Stefan Wahren <wahrenst@gmx.net>,
Chen-Yu Tsai <wens@kernel.org>, linux-arm-kernel@lists.infradead.org
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This builds the BCM2711 thermal driver as module for the Raspberry Pi 4.
Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
---
arch/arm/configs/multi_v7_defconfig | 1 +
arch/arm64/configs/defconfig | 1 +
2 files changed, 2 insertions(+)
--
2.7.4
diff --git a/arch/arm/configs/multi_v7_defconfig b/arch/arm/configs/multi_v7_defconfig
index 13ba532..441b795 100644
--- a/arch/arm/configs/multi_v7_defconfig
+++ b/arch/arm/configs/multi_v7_defconfig
@@ -487,6 +487,7 @@ CONFIG_IMX_THERMAL=y
CONFIG_ROCKCHIP_THERMAL=y
CONFIG_RCAR_THERMAL=y
CONFIG_ARMADA_THERMAL=y
+CONFIG_BCM2711_THERMAL=m
CONFIG_BCM2835_THERMAL=m
CONFIG_BRCMSTB_THERMAL=m
CONFIG_ST_THERMAL_MEMMAP=y
diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index 8e05c39..0a52987 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -444,6 +444,7 @@ CONFIG_ROCKCHIP_THERMAL=m
CONFIG_RCAR_THERMAL=y
CONFIG_RCAR_GEN3_THERMAL=y
CONFIG_ARMADA_THERMAL=y
+CONFIG_BCM2711_THERMAL=m
CONFIG_BCM2835_THERMAL=m
CONFIG_BRCMSTB_THERMAL=m
CONFIG_EXYNOS_THERMAL=y
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