[PATCH 1/6] ARM: prima2: Register with kernel restart handler

From: Thierry Reding <thierry.reding@gmail.com>
To: Russell King <linux@armlinux.org.uk>, arm@kernel.org
Cc: Arnd Bergmann <arnd@arndb.de>, Olof Johansson <olof@lixom.net>,
	Guenter Roeck <linux@roeck-us.net>,
	Stefan Agner <stefan@agner.ch>,
	Wolfram Sang <wsa+renesas@sang-engineering.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
	Stefano Stabellini <stefano.stabellini@eu.citrix.com>,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH 1/6] ARM: prima2: Register with kernel restart handler
Date: Tue, 15 Oct 2019 16:51:42 +0200	[thread overview]
Message-ID: <20191015145147.1106247-2-thierry.reding@gmail.com> (raw)
In-Reply-To: <20191015145147.1106247-1-thierry.reding@gmail.com>

From: Guenter Roeck <linux@roeck-us.net>

Register with kernel restart handler instead of setting arm_pm_restart
directly. By doing this, the prima2 reset handler can be prioritized
among other restart methods available on a particular board.

Select a high priority of 192 since the original code overwrites the
default arm restart handler.

Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Thierry Reding <treding@nvidia.com>
---
 arch/arm/mach-prima2/rstc.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-prima2/rstc.c b/arch/arm/mach-prima2/rstc.c
index 9d56606ac87f..825dd5fcc37b 100644
--- a/arch/arm/mach-prima2/rstc.c
+++ b/arch/arm/mach-prima2/rstc.c
@@ -64,11 +64,18 @@ static struct reset_controller_dev sirfsoc_reset_controller = {
 
 #define SIRFSOC_SYS_RST_BIT  BIT(31)
 
-static void sirfsoc_restart(enum reboot_mode mode, const char *cmd)
+static int sirfsoc_restart(struct notifier_block *nb, unsigned long action,
+			   void *data)
 {
 	writel(SIRFSOC_SYS_RST_BIT, sirfsoc_rstc_base);
+	return NOTIFY_DONE;
 }
 
+static struct notifier_block sirfsoc_restart_nb = {
+	.notifier_call  = sirfsoc_restart,
+	.priority       = 192,
+};
+
 static int sirfsoc_rstc_probe(struct platform_device *pdev)
 {
 	struct device_node *np = pdev->dev.of_node;
@@ -79,7 +86,7 @@ static int sirfsoc_rstc_probe(struct platform_device *pdev)
 	}
 
 	sirfsoc_reset_controller.of_node = np;
-	arm_pm_restart = sirfsoc_restart;
+	register_restart_handler(&sirfsoc_restart_nb);
 
 	if (IS_ENABLED(CONFIG_RESET_CONTROLLER))
 		reset_controller_register(&sirfsoc_reset_controller);
-- 
2.23.0

