From: Stefan Agner <stefan@agner.ch>
To: shawn.guo@linaro.org, kernel@pengutronix.de, linux@roeck-us.net,
arnd@arndb.de, sre@kernel.org, fkan@apm.com,
grant.likely@linaro.org, robh+dt@kernel.org
Cc: dbaryshkov@gmail.com, dwmw2@infradead.org,
devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, stefan@agner.ch
Subject: [PATCH v2 1/3] power: reset: read priority from device tree
Date: Mon, 1 Dec 2014 18:03:07 +0100 [thread overview]
Message-ID: <1417453389-1588-2-git-send-email-stefan@agner.ch> (raw)
In-Reply-To: <1417453389-1588-1-git-send-email-stefan@agner.ch>
This patch adds an optional property which allows to specify the
reset source priority. This priority is used by the kernel restart
handler call chain to sort out the proper reset/restart method.
Depending on the power design of a board or other machine/board
specific peculiarity, it is not possible to pick a generic priority.
Signed-off-by: Stefan Agner <stefan@agner.ch>
---
Documentation/devicetree/bindings/power/reset/syscon-reboot.txt | 3 +++
drivers/power/reset/syscon-reboot.c | 5 ++++-
2 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/power/reset/syscon-reboot.txt b/Documentation/devicetree/bindings/power/reset/syscon-reboot.txt
index 1190631..ee41d9c 100644
--- a/Documentation/devicetree/bindings/power/reset/syscon-reboot.txt
+++ b/Documentation/devicetree/bindings/power/reset/syscon-reboot.txt
@@ -11,6 +11,9 @@ Required properties:
- offset: offset in the register map for the reboot register (in bytes)
- mask: the reset value written to the reboot register (32 bit access)
+Optional properties:
+- priority: define the priority of the reset (0-255, defaults to 128)
+
Default will be little endian mode, 32 bit access only.
Examples:
diff --git a/drivers/power/reset/syscon-reboot.c b/drivers/power/reset/syscon-reboot.c
index 815b901..3060d6b 100644
--- a/drivers/power/reset/syscon-reboot.c
+++ b/drivers/power/reset/syscon-reboot.c
@@ -67,8 +67,11 @@ static int syscon_reboot_probe(struct platform_device *pdev)
if (of_property_read_u32(pdev->dev.of_node, "mask", &ctx->mask))
return -EINVAL;
- ctx->restart_handler.notifier_call = syscon_restart_handle;
ctx->restart_handler.priority = 128;
+ of_property_read_u32(pdev->dev.of_node, "priority",
+ &ctx->restart_handler.priority);
+
+ ctx->restart_handler.notifier_call = syscon_restart_handle;
err = register_restart_handler(&ctx->restart_handler);
if (err)
dev_err(dev, "can't register restart notifier (err=%d)\n", err);
--
2.1.3
next prev parent reply other threads:[~2014-12-01 17:03 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-01 17:03 [PATCH v2 0/3] power: reset: vf610 system reset controller Stefan Agner
2014-12-01 17:03 ` Stefan Agner [this message]
[not found] ` <1417453389-1588-2-git-send-email-stefan-XLVq0VzYD2Y@public.gmane.org>
2014-12-01 17:11 ` [PATCH v2 1/3] power: reset: read priority from device tree Mark Rutland
2014-12-01 17:22 ` Guenter Roeck
2014-12-01 17:24 ` Stefan Agner
[not found] ` <e5c5a44c84b95c4e48ed01c4dcffd35a-XLVq0VzYD2Y@public.gmane.org>
2014-12-01 17:41 ` Mark Rutland
2014-12-01 17:51 ` Guenter Roeck
[not found] ` <20141201175134.GC24692-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>
2014-12-01 17:59 ` Mark Rutland
2014-12-01 18:12 ` Guenter Roeck
2014-12-01 18:18 ` Mark Rutland
2014-12-01 18:50 ` Arnd Bergmann
2014-12-01 17:15 ` Feng Kan
[not found] ` <CAL85gmBq30pWxP0buKbM8so6QqsJq2YojiSK1EWtMPsH_7foeg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-12-01 17:29 ` Stefan Agner
[not found] ` <ea4f7a2bfdb9bea45cab9418c211083b-XLVq0VzYD2Y@public.gmane.org>
2014-12-01 17:38 ` Feng Kan
[not found] ` <CAL85gmBNE7oDbE+LX+V=AFJO61Ta0Gekoq6sDb8TkEnoPsNFVA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-12-01 17:42 ` Guenter Roeck
[not found] ` <20141201174215.GB24692-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>
2014-12-01 22:18 ` Stefan Agner
[not found] ` <3916ca2867ced70e16903d6d44aaae8f-XLVq0VzYD2Y@public.gmane.org>
2014-12-01 22:35 ` Guenter Roeck
2014-12-01 17:03 ` [PATCH v2 2/3] ARM: dts: vf610: add system reset controller and syscon-reboot Stefan Agner
2014-12-01 17:03 ` [PATCH v2 3/3] ARM: imx_v6_v7_defconfig: add POWER_RESET_SYSCON Stefan Agner
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