diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0750-thermal-Add-BCM2711-thermal-driver.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0750-thermal-Add-BCM2711-thermal-driver.patch | 173 |
1 files changed, 0 insertions, 173 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0750-thermal-Add-BCM2711-thermal-driver.patch b/target/linux/bcm27xx/patches-5.4/950-0750-thermal-Add-BCM2711-thermal-driver.patch deleted file mode 100644 index d7e438fd72..0000000000 --- a/target/linux/bcm27xx/patches-5.4/950-0750-thermal-Add-BCM2711-thermal-driver.patch +++ /dev/null @@ -1,173 +0,0 @@ -From 84477b71c184345517625f5c3eccf26a29eac4df Mon Sep 17 00:00:00 2001 -From: Stefan Wahren <stefan.wahren@i2se.com> -Date: Mon, 13 Jan 2020 19:56:16 +0100 -Subject: [PATCH] thermal: Add BCM2711 thermal driver - -Commit 59b781352dc4cb9ae27a8ddae0cda979d29d8af7 upstream. - -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 <stefan.wahren@i2se.com> -Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> -Reviewed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de> -Tested-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de> -Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> -Link: https://lore.kernel.org/r/1578941778-23321-3-git-send-email-stefan.wahren@i2se.com -Signed-off-by: Chen-Yu Tsai <wens@csie.org> ---- - drivers/thermal/broadcom/Kconfig | 7 ++ - drivers/thermal/broadcom/Makefile | 1 + - drivers/thermal/broadcom/bcm2711_thermal.c | 123 +++++++++++++++++++++ - 3 files changed, 131 insertions(+) - create mode 100644 drivers/thermal/broadcom/bcm2711_thermal.c - ---- a/drivers/thermal/broadcom/Kconfig -+++ b/drivers/thermal/broadcom/Kconfig -@@ -1,4 +1,11 @@ - # 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 THERMAL_OF && MFD_SYSCON -+ help -+ Support for thermal sensors on Broadcom BCM2711 SoCs. -+ - config BCM2835_THERMAL - tristate "Thermal sensors on bcm2835 SoC" - depends on ARCH_BCM2835 || COMPILE_TEST ---- 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 ---- /dev/null -+++ b/drivers/thermal/broadcom/bcm2711_thermal.c -@@ -0,0 +1,123 @@ -+// SPDX-License-Identifier: GPL-2.0+ -+/* -+ * Broadcom AVS RO thermal sensor driver -+ * -+ * based on brcmstb_thermal -+ * -+ * Copyright (C) 2020 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/mfd/syscon.h> -+#include <linux/module.h> -+#include <linux/platform_device.h> -+#include <linux/of_device.h> -+#include <linux/regmap.h> -+#include <linux/thermal.h> -+ -+#include "../thermal_hwmon.h" -+ -+#define AVS_RO_TEMP_STATUS 0x200 -+#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 { -+ struct regmap *regmap; -+ 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; -+ int ret; -+ long t; -+ -+ ret = regmap_read(priv->regmap, AVS_RO_TEMP_STATUS, &val); -+ if (ret) -+ return ret; -+ -+ if (!(val & AVS_RO_TEMP_STATUS_VALID_MSK)) -+ return -EIO; -+ -+ val &= AVS_RO_TEMP_STATUS_DATA_MSK; -+ -+ /* Convert a HW code to a temperature reading (millidegree celsius) */ -+ t = slope * val + offset; -+ -+ *temp = t < 0 ? 0 : 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 device *dev = &pdev->dev; -+ struct device_node *parent; -+ struct regmap *regmap; -+ int ret; -+ -+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); -+ if (!priv) -+ return -ENOMEM; -+ -+ /* get regmap from syscon node */ -+ parent = of_get_parent(dev->of_node); /* parent should be syscon node */ -+ regmap = syscon_node_to_regmap(parent); -+ of_node_put(parent); -+ if (IS_ERR(regmap)) { -+ ret = PTR_ERR(regmap); -+ dev_err(dev, "failed to get regmap: %d\n", ret); -+ return ret; -+ } -+ priv->regmap = regmap; -+ -+ thermal = devm_thermal_zone_of_sensor_register(dev, 0, priv, -+ &bcm2711_thermal_of_ops); -+ if (IS_ERR(thermal)) { -+ ret = PTR_ERR(thermal); -+ dev_err(dev, "could not register sensor: %d\n", ret); -+ return ret; -+ } -+ -+ priv->thermal = thermal; -+ -+ thermal->tzp->no_hwmon = false; -+ ret = thermal_add_hwmon_sysfs(thermal); -+ if (ret) -+ return ret; -+ -+ return 0; -+} -+ -+static struct platform_driver bcm2711_thermal_driver = { -+ .probe = bcm2711_thermal_probe, -+ .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"); |