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Content-Disposition: inline; filename="0436-overlays-Add-assert_falling_edge-to-pps-gpio-overlay.patch"
Last-Modified: Thu, 25 Jul 2024 12:47:11 GMT
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ETag: "05813217e2dcabab1704ce3bfccfbf2a2c2443c6"

From c430f79020084981d8cfeaee85caa1ee243919b6 Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Tue, 9 Aug 2016 21:51:41 +0100
Subject: [PATCH] overlays: Add assert_falling_edge to pps-gpio overlay

See: https://github.com/raspberrypi/linux/issues/1590
---
 arch/arm/boot/dts/overlays/README               | 2 ++
 arch/arm/boot/dts/overlays/pps-gpio-overlay.dts | 1 +
 2 files changed, 3 insertions(+)

--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -797,6 +797,8 @@ Name:   pps-gpio
 Info:   Configures the pps-gpio (pulse-per-second time signal via GPIO).
 Load:   dtoverlay=pps-gpio,<param>=<val>
 Params: gpiopin                 Input GPIO (default "18")
+        assert_falling_edge     When present, assert is indicated by a falling
+                                edge, rather than by a rising edge
 
 
 Name:   pwm
--- a/arch/arm/boot/dts/overlays/pps-gpio-overlay.dts
+++ b/arch/arm/boot/dts/overlays/pps-gpio-overlay.dts
@@ -30,5 +30,6 @@
 	__overrides__ {
 		gpiopin = <&pps>,"gpios:4",
 			  <&pps_pins>,"brcm,pins:0";
+		assert_falling_edge = <&pps>,"assert-falling-edge?";
 	};
 };
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From: popcornmix &lt;popcornmix@gmail.com&gt;
Date: Tue, 26 Mar 2013 19:24:24 +0000
Subject: [PATCH] Added hwmon/thermal driver for reporting core temperature.
 Thanks Dorian
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

BCM270x: Move thermal sensor to Device Tree

Add Device Tree support to bcm2835-thermal driver.
Add thermal sensor device to Device Tree.
Don&#39;t add platform device when booting in DT mode.

Signed-off-by: Noralf Trønnes &lt;noralf@tronnes.org&gt;
<span class="gd">---</span>
 drivers/thermal/Kconfig           |   7 ++
 drivers/thermal/Makefile          |   1 +
 drivers/thermal/bcm2835-thermal.c | 141 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 149 insertions(+)
 create mode 100644 drivers/thermal/bcm2835-thermal.c

<span class="gd">--- a/drivers/thermal/Kconfig</span>
<span class="gi">+++ b/drivers/thermal/Kconfig</span>
<span class="gu">@@ -285,6 +285,13 @@ config INTEL_POWERCLAMP</span>
 	  enforce idle time which results in more package C-state residency. The
 	  user interface is exposed via generic thermal framework.
 
<span class="gi">+config THERMAL_BCM2835</span>
<span class="gi">+	depends on RASPBERRYPI_FIRMWARE</span>
<span class="gi">+	tristate &quot;BCM2835 Thermal Driver&quot;</span>
<span class="gi">+	help</span>
<span class="gi">+	  This will enable temperature monitoring for the Broadcom BCM2835</span>
<span class="gi">+	  chip. If built as a module, it will be called &#39;bcm2835-thermal&#39;.</span>
<span class="gi">+</span>
 config X86_PKG_TEMP_THERMAL
 	tristate &quot;X86 package temperature thermal driver&quot;
 	depends on X86_THERMAL_VECTOR
<span class="gd">--- a/drivers/thermal/Makefile</span>
<span class="gi">+++ b/drivers/thermal/Makefile</span>
<span class="gu">@@ -39,6 +39,7 @@ obj-$(CONFIG_ARMADA_THERMAL)	+= armada_t</span>
 obj-$(CONFIG_IMX_THERMAL)	+= imx_thermal.o
 obj-$(CONFIG_DB8500_CPUFREQ_COOLING)	+= db8500_cpufreq_cooling.o
 obj-$(CONFIG_INTEL_POWERCLAMP)	+= intel_powerclamp.o
<span class="gi">+obj-$(CONFIG_THERMAL_BCM2835)	+= bcm2835-thermal.o</span>
 obj-$(CONFIG_X86_PKG_TEMP_THERMAL)	+= x86_pkg_temp_thermal.o
 obj-$(CONFIG_INTEL_SOC_DTS_IOSF_CORE)	+= intel_soc_dts_iosf.o
 obj-$(CONFIG_INTEL_SOC_DTS_THERMAL)	+= intel_soc_dts_thermal.o
<span class="gd">--- /dev/null</span>
<span class="gi">+++ b/drivers/thermal/bcm2835-thermal.c</span>
<span class="gu">@@ -0,0 +1,141 @@</span>
<span class="gi">+/*****************************************************************************</span>
<span class="gi">+* Copyright 2011 Broadcom Corporation.  All rights reserved.</span>
<span class="gi">+*</span>
<span class="gi">+* Unless you and Broadcom execute a separate written software license</span>
<span class="gi">+* agreement governing use of this software, this software is licensed to you</span>
<span class="gi">+* under the terms of the GNU General Public License version 2, available at</span>
<span class="gi">+* http://www.broadcom.com/licenses/GPLv2.php (the &quot;GPL&quot;).</span>
<span class="gi">+*</span>
<span class="gi">+* Notwithstanding the above, under no circumstances may you combine this</span>
<span class="gi">+* software in any way with any other Broadcom software provided under a</span>
<span class="gi">+* license other than the GPL, without Broadcom&#39;s express prior written</span>
<span class="gi">+* consent.</span>
<span class="gi">+*****************************************************************************/</span>
<span class="gi">+</span>
<span class="gi">+#include &lt;linux/module.h&gt;</span>
<span class="gi">+#include &lt;linux/platform_device.h&gt;</span>
<span class="gi">+#include &lt;linux/thermal.h&gt;</span>
<span class="gi">+#include &lt;soc/bcm2835/raspberrypi-firmware.h&gt;</span>
<span class="gi">+</span>
<span class="gi">+static int bcm2835_thermal_get_property(struct thermal_zone_device *tz,</span>
<span class="gi">+					int *temp, u32 tag)</span>
<span class="gi">+{</span>
<span class="gi">+	struct rpi_firmware *fw = tz-&gt;devdata;</span>
<span class="gi">+	struct {</span>
<span class="gi">+		u32 id;</span>
<span class="gi">+		u32 val;</span>
<span class="gi">+	} packet;</span>
<span class="gi">+	int ret;</span>
<span class="gi">+</span>
<span class="gi">+	*temp = 0;</span>
<span class="gi">+	packet.id = 0;</span>
<span class="gi">+	ret = rpi_firmware_property(fw, tag, &amp;packet, sizeof(packet));</span>
<span class="gi">+	if (ret) {</span>
<span class="gi">+		dev_err(&amp;tz-&gt;device, &quot;Failed to get temperature\n&quot;);</span>
<span class="gi">+		return ret;</span>
<span class="gi">+	}</span>
<span class="gi">+</span>
<span class="gi">+	*temp = packet.val;</span>
<span class="gi">+	dev_dbg(&amp;tz-&gt;device, &quot;%stemp=%d\n&quot;,</span>
<span class="gi">+		tag == RPI_FIRMWARE_GET_MAX_TEMPERATURE ? &quot;max&quot; : &quot;&quot;, *temp);</span>
<span class="gi">+</span>
<span class="gi">+	return 0;</span>
<span class="gi">+}</span>
<span class="gi">+</span>
<span class="gi">+static int bcm2835_thermal_get_temp(struct thermal_zone_device *tz,</span>
<span class="gi">+				    int *temp)</span>
<span class="gi">+{</span>
<span class="gi">+	return bcm2835_thermal_get_property(tz, temp,</span>
<span class="gi">+					    RPI_FIRMWARE_GET_TEMPERATURE);</span>
<span class="gi">+}</span>
<span class="gi">+</span>
<span class="gi">+static int bcm2835_thermal_get_max_temp(struct thermal_zone_device *tz,</span>
<span class="gi">+					int trip, int *temp)</span>
<span class="gi">+{</span>
<span class="gi">+	/*</span>
<span class="gi">+	 * The maximum safe temperature of the SoC.</span>
<span class="gi">+	 * Overclock may be disabled above this temperature.</span>
<span class="gi">+	 */</span>
<span class="gi">+	return bcm2835_thermal_get_property(tz, temp,</span>
<span class="gi">+					    RPI_FIRMWARE_GET_MAX_TEMPERATURE);</span>
<span class="gi">+}</span>
<span class="gi">+</span>
<span class="gi">+static int bcm2835_thermal_get_trip_type(struct thermal_zone_device *tz,</span>
<span class="gi">+					 int trip, enum thermal_trip_type *type)</span>
<span class="gi">+{</span>
<span class="gi">+	*type = THERMAL_TRIP_HOT;</span>
<span class="gi">+</span>
<span class="gi">+	return 0;</span>
<span class="gi">+}</span>
<span class="gi">+</span>
<span class="gi">+static int bcm2835_thermal_get_mode(struct thermal_zone_device *tz,</span>
<span class="gi">+				    enum thermal_device_mode *mode)</span>
<span class="gi">+{</span>
<span class="gi">+	*mode = THERMAL_DEVICE_ENABLED;</span>
<span class="gi">+</span>
<span class="gi">+	return 0;</span>
<span class="gi">+}</span>
<span class="gi">+</span>
<span class="gi">+static struct thermal_zone_device_ops ops  = {</span>
<span class="gi">+	.get_temp = bcm2835_thermal_get_temp,</span>
<span class="gi">+	.get_trip_temp = bcm2835_thermal_get_max_temp,</span>
<span class="gi">+	.get_trip_type = bcm2835_thermal_get_trip_type,</span>
<span class="gi">+	.get_mode = bcm2835_thermal_get_mode,</span>
<span class="gi">+};</span>
<span class="gi">+</span>
<span class="gi">+static int bcm2835_thermal_probe(struct platform_device *pdev)</span>
<span class="gi">+{</span>
<span class="gi">+	struct device_node *fw_np;</span>
<span class="gi">+	struct rpi_firmware *fw;</span>
<span class="gi">+	struct thermal_zone_device *tz;</span>
<span class="gi">+</span>
<span class="gi">+	fw_np = of_parse_phandle(pdev-&gt;dev.of_node, &quot;firmware&quot;, 0);</span>
<span class="gi">+/* Remove comment when booting without Device Tree is no longer supported</span>
<span class="gi">+	if (!fw_np) {</span>
<span class="gi">+		dev_err(&amp;pdev-&gt;dev, &quot;Missing firmware node\n&quot;);</span>
<span class="gi">+		return -ENOENT;</span>
<span class="gi">+	}</span>
<span class="gi">+*/</span>
<span class="gi">+	fw = rpi_firmware_get(fw_np);</span>
<span class="gi">+	if (!fw)</span>
<span class="gi">+		return -EPROBE_DEFER;</span>
<span class="gi">+</span>
<span class="gi">+	tz = thermal_zone_device_register(&quot;bcm2835_thermal&quot;, 1, 0, fw, &amp;ops,</span>
<span class="gi">+					  NULL, 0, 0);</span>
<span class="gi">+	if (IS_ERR(tz)) {</span>
<span class="gi">+		dev_err(&amp;pdev-&gt;dev, &quot;Failed to register the thermal device\n&quot;);</span>
<span class="gi">+		return PTR_ERR(tz);</span>
<span class="gi">+	}</span>
<span class="gi">+</span>
<span class="gi">+	platform_set_drvdata(pdev, tz);</span>
<span class="gi">+</span>
<span class="gi">+	return 0;</span>
<span class="gi">+}</span>
<span class="gi">+</span>
<span class="gi">+static int bcm2835_thermal_remove(struct platform_device *pdev)</span>
<span class="gi">+{</span>
<span class="gi">+	thermal_zone_device_unregister(platform_get_drvdata(pdev));</span>
<span class="gi">+</span>
<span class="gi">+	return 0;</span>
<span class="gi">+}</span>
<span class="gi">+</span>
<span class="gi">+static const struct of_device_id bcm2835_thermal_of_match_table[] = {</span>
<span class="gi">+	{ .compatible = &quot;brcm,bcm2835-thermal&quot;, },</span>
<span class="gi">+	{},</span>
<span class="gi">+};</span>
<span class="gi">+MODULE_DEVICE_TABLE(of, bcm2835_thermal_of_match_table);</span>
<span class="gi">+</span>
<span class="gi">+static struct platform_driver bcm2835_thermal_driver = {</span>
<span class="gi">+	.probe = bcm2835_thermal_probe,</span>
<span class="gi">+	.remove = bcm2835_thermal_remove,</span>
<span class="gi">+	.driver = {</span>
<span class="gi">+		.name = &quot;bcm2835_thermal&quot;,</span>
<span class="gi">+		.of_match_table = bcm2835_thermal_of_match_table,</span>
<span class="gi">+	},</span>
<span class="gi">+};</span>
<span class="gi">+module_platform_driver(bcm2835_thermal_driver);</span>
<span class="gi">+</span>
<span class="gi">+MODULE_AUTHOR(&quot;Dorian Peake&quot;);</span>
<span class="gi">+MODULE_AUTHOR(&quot;Noralf Trønnes&quot;);</span>
<span class="gi">+MODULE_DESCRIPTION(&quot;Thermal driver for bcm2835 chip&quot;);</span>
<span class="gi">+MODULE_LICENSE(&quot;GPL&quot;);</span>
</pre></div>
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