linux-kernel - [PATCH v3 2/3] power: reset: syscon-reboot: Add support for specifying priority

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Message-Id: <20220831081715.14673-2-pali@kernel.org>
Date:   Wed, 31 Aug 2022 10:17:14 +0200
From:   Pali Rohár <pali@...nel.org>
To:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Michael Ellerman <mpe@...erman.id.au>
Cc:     devicetree@...r.kernel.org, linux-pm@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        Marek Behún <kabel@...nel.org>
Subject: [PATCH v3 2/3] power: reset: syscon-reboot: Add support for specifying priority

Read new optional device tree property priority for specifying priority
level of reset handler. Default value is 192 as before.

Signed-off-by: Pali Rohár <pali@...nel.org>
---
 drivers/power/reset/syscon-reboot.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/power/reset/syscon-reboot.c b/drivers/power/reset/syscon-reboot.c
index 510e363381ca..45e34e6885f7 100644
--- a/drivers/power/reset/syscon-reboot.c
+++ b/drivers/power/reset/syscon-reboot.c
@@ -44,6 +44,7 @@ static int syscon_reboot_probe(struct platform_device *pdev)
 	struct syscon_reboot_context *ctx;
 	struct device *dev = &pdev->dev;
 	int mask_err, value_err;
+	int priority;
 	int err;
 
 	ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
@@ -57,6 +58,9 @@ static int syscon_reboot_probe(struct platform_device *pdev)
 			return PTR_ERR(ctx->map);
 	}
 
+	if (of_property_read_s32(pdev->dev.of_node, "priority", &priority))
+		priority = 192;
+
 	if (of_property_read_u32(pdev->dev.of_node, "offset", &ctx->offset))
 		return -EINVAL;
 
@@ -77,7 +81,7 @@ static int syscon_reboot_probe(struct platform_device *pdev)
 	}
 
 	ctx->restart_handler.notifier_call = syscon_restart_handle;
-	ctx->restart_handler.priority = 192;
+	ctx->restart_handler.priority = priority;
 	err = register_restart_handler(&ctx->restart_handler);
 	if (err)
 		dev_err(dev, "can't register restart notifier (err=%d)\n", err);
-- 
2.20.1