[PATCH 1/2] thermal: remove tango driver
Arnd Bergmann
arnd at kernel.org
Wed Jan 20 11:23:59 EST 2021
From: Arnd Bergmann <arnd at arndb.de>
The tango platform is getting removed, so the driver is no
longer needed.
Cc: Marc Gonzalez <marc.w.gonzalez at free.fr>
Cc: Mans Rullgard <mans at mansr.com>
Signed-off-by: Arnd Bergmann <arnd at arndb.de>
---
.../bindings/thermal/tango-thermal.txt | 17 ---
drivers/thermal/Kconfig | 9 --
drivers/thermal/Makefile | 1 -
drivers/thermal/tango_thermal.c | 126 ------------------
4 files changed, 153 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/thermal/tango-thermal.txt
delete mode 100644 drivers/thermal/tango_thermal.c
diff --git a/Documentation/devicetree/bindings/thermal/tango-thermal.txt b/Documentation/devicetree/bindings/thermal/tango-thermal.txt
deleted file mode 100644
index 2c918d742867..000000000000
--- a/Documentation/devicetree/bindings/thermal/tango-thermal.txt
+++ /dev/null
@@ -1,17 +0,0 @@
-* Tango Thermal
-
-The SMP8758 SoC includes 3 instances of this temperature sensor
-(in the CPU, video decoder, and PCIe controller).
-
-Required properties:
-- #thermal-sensor-cells: Should be 0 (see Documentation/devicetree/bindings/thermal/thermal-sensor.yaml)
-- compatible: "sigma,smp8758-thermal"
-- reg: Address range of the thermal registers
-
-Example:
-
- cpu_temp: thermal at 920100 {
- #thermal-sensor-cells = <0>;
- compatible = "sigma,smp8758-thermal";
- reg = <0x920100 12>;
- };
diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig
index 7edc8dc6bbab..cf199574c096 100644
--- a/drivers/thermal/Kconfig
+++ b/drivers/thermal/Kconfig
@@ -450,15 +450,6 @@ depends on (ARCH_STI || ARCH_STM32) && OF
source "drivers/thermal/st/Kconfig"
endmenu
-config TANGO_THERMAL
- tristate "Tango thermal management"
- depends on ARCH_TANGO || COMPILE_TEST
- help
- Enable the Tango thermal driver, which supports the primitive
- temperature sensor embedded in Tango chips since the SMP8758.
- This sensor only generates a 1-bit signal to indicate whether
- the die temperature exceeds a programmable threshold.
-
source "drivers/thermal/tegra/Kconfig"
config GENERIC_ADC_THERMAL
diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile
index b64dd50a6629..a44dda2d03bc 100644
--- a/drivers/thermal/Makefile
+++ b/drivers/thermal/Makefile
@@ -42,7 +42,6 @@ obj-y += samsung/
obj-$(CONFIG_DOVE_THERMAL) += dove_thermal.o
obj-$(CONFIG_DB8500_THERMAL) += db8500_thermal.o
obj-$(CONFIG_ARMADA_THERMAL) += armada_thermal.o
-obj-$(CONFIG_TANGO_THERMAL) += tango_thermal.o
obj-$(CONFIG_IMX_THERMAL) += imx_thermal.o
obj-$(CONFIG_IMX_SC_THERMAL) += imx_sc_thermal.o
obj-$(CONFIG_IMX8MM_THERMAL) += imx8mm_thermal.o
diff --git a/drivers/thermal/tango_thermal.c b/drivers/thermal/tango_thermal.c
deleted file mode 100644
index 304b461e12aa..000000000000
--- a/drivers/thermal/tango_thermal.c
+++ /dev/null
@@ -1,126 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-#include <linux/io.h>
-#include <linux/delay.h>
-#include <linux/module.h>
-#include <linux/thermal.h>
-#include <linux/platform_device.h>
-
-/*
- * According to a data sheet draft, "this temperature sensor uses a bandgap
- * type of circuit to compare a voltage which has a negative temperature
- * coefficient with a voltage that is proportional to absolute temperature.
- * A resistor bank allows 41 different temperature thresholds to be selected
- * and the logic output will then indicate whether the actual die temperature
- * lies above or below the selected threshold."
- */
-
-#define TEMPSI_CMD 0
-#define TEMPSI_RES 4
-#define TEMPSI_CFG 8
-
-#define CMD_OFF 0
-#define CMD_ON 1
-#define CMD_READ 2
-
-#define IDX_MIN 15
-#define IDX_MAX 40
-
-struct tango_thermal_priv {
- void __iomem *base;
- int thresh_idx;
-};
-
-static bool temp_above_thresh(void __iomem *base, int thresh_idx)
-{
- writel(CMD_READ | thresh_idx << 8, base + TEMPSI_CMD);
- usleep_range(10, 20);
- writel(CMD_READ | thresh_idx << 8, base + TEMPSI_CMD);
-
- return readl(base + TEMPSI_RES);
-}
-
-static int tango_get_temp(void *arg, int *res)
-{
- struct tango_thermal_priv *priv = arg;
- int idx = priv->thresh_idx;
-
- if (temp_above_thresh(priv->base, idx)) {
- /* Search upward by incrementing thresh_idx */
- while (idx < IDX_MAX && temp_above_thresh(priv->base, ++idx))
- cpu_relax();
- idx = idx - 1; /* always return lower bound */
- } else {
- /* Search downward by decrementing thresh_idx */
- while (idx > IDX_MIN && !temp_above_thresh(priv->base, --idx))
- cpu_relax();
- }
-
- *res = (idx * 9 / 2 - 38) * 1000; /* millidegrees Celsius */
- priv->thresh_idx = idx;
-
- return 0;
-}
-
-static const struct thermal_zone_of_device_ops ops = {
- .get_temp = tango_get_temp,
-};
-
-static void tango_thermal_init(struct tango_thermal_priv *priv)
-{
- writel(0, priv->base + TEMPSI_CFG);
- writel(CMD_ON, priv->base + TEMPSI_CMD);
-}
-
-static int tango_thermal_probe(struct platform_device *pdev)
-{
- struct resource *res;
- struct tango_thermal_priv *priv;
- struct thermal_zone_device *tzdev;
-
- 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);
-
- platform_set_drvdata(pdev, priv);
- priv->thresh_idx = IDX_MIN;
- tango_thermal_init(priv);
-
- tzdev = devm_thermal_zone_of_sensor_register(&pdev->dev, 0, priv, &ops);
- return PTR_ERR_OR_ZERO(tzdev);
-}
-
-static int __maybe_unused tango_thermal_resume(struct device *dev)
-{
- tango_thermal_init(dev_get_drvdata(dev));
- return 0;
-}
-
-static SIMPLE_DEV_PM_OPS(tango_thermal_pm, NULL, tango_thermal_resume);
-
-static const struct of_device_id tango_sensor_ids[] = {
- {
- .compatible = "sigma,smp8758-thermal",
- },
- { /* sentinel */ }
-};
-MODULE_DEVICE_TABLE(of, tango_sensor_ids);
-
-static struct platform_driver tango_thermal_driver = {
- .probe = tango_thermal_probe,
- .driver = {
- .name = "tango-thermal",
- .of_match_table = tango_sensor_ids,
- .pm = &tango_thermal_pm,
- },
-};
-
-module_platform_driver(tango_thermal_driver);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Sigma Designs");
-MODULE_DESCRIPTION("Tango temperature sensor");
--
2.29.2
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