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

From: Thierry Reding
Date: Tue Oct 15 2019 - 10:51:59 EST


From: Guenter Roeck <linux@xxxxxxxxxxxx>

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@xxxxxxxx>
Reviewed-by: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Signed-off-by: Thierry Reding <treding@xxxxxxxxxx>
---
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