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From: Thierry Reding <thierry.reding@gmail.com>
To: Russell King <linux@armlinux.org.uk>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will.deacon@arm.com>, Arnd Bergmann <arnd@arndb.de>
Cc: Mark Rutland <mark.rutland@arm.com>,
	Guenter Roeck <linux@roeck-us.net>,
	Stefano Stabellini <sstabellini@kernel.org>,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH 3/6] drivers: firmware: psci: Register with kernel restart handler
Date: Mon, 30 Jan 2017 12:05:09 +0100	[thread overview]
Message-ID: <20170130110512.6943-4-thierry.reding@gmail.com> (raw)
In-Reply-To: <20170130110512.6943-1-thierry.reding@gmail.com>

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

Register with kernel restart handler instead of setting arm_pm_restart
directly. This enables support for replacing the PSCI restart handler
with a different handler if necessary for a specific board.

Select a priority of 129 to indicate a higher than default priority, but
keep it as low as possible since PSCI reset is known to fail on some
boards.

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

diff --git a/drivers/firmware/psci.c b/drivers/firmware/psci.c
index 66a8793f3b37..ce9814462ce0 100644
--- a/drivers/firmware/psci.c
+++ b/drivers/firmware/psci.c
@@ -232,11 +232,18 @@ static int get_set_conduit_method(struct device_node *np)
 	return 0;
 }
 
-static void psci_sys_reset(enum reboot_mode reboot_mode, const char *cmd)
+static int psci_sys_reset(struct notifier_block *nb, unsigned long action,
+			  void *data)
 {
 	invoke_psci_fn(PSCI_0_2_FN_SYSTEM_RESET, 0, 0, 0);
+	return NOTIFY_DONE;
 }
 
+static struct notifier_block psci_sys_reset_nb = {
+	.notifier_call = psci_sys_reset,
+	.priority = 129,
+};
+
 static void psci_sys_poweroff(void)
 {
 	invoke_psci_fn(PSCI_0_2_FN_SYSTEM_OFF, 0, 0, 0);
@@ -513,7 +520,7 @@ static void __init psci_0_2_set_functions(void)
 
 	psci_ops.migrate_info_type = psci_migrate_info_type;
 
-	arm_pm_restart = psci_sys_reset;
+	register_restart_handler(&psci_sys_reset_nb);
 
 	pm_power_off = psci_sys_poweroff;
 }
-- 
2.11.0

WARNING: multiple messages have this Message-ID (diff)
From: thierry.reding@gmail.com (Thierry Reding)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 3/6] drivers: firmware: psci: Register with kernel restart handler
Date: Mon, 30 Jan 2017 12:05:09 +0100	[thread overview]
Message-ID: <20170130110512.6943-4-thierry.reding@gmail.com> (raw)
In-Reply-To: <20170130110512.6943-1-thierry.reding@gmail.com>

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

Register with kernel restart handler instead of setting arm_pm_restart
directly. This enables support for replacing the PSCI restart handler
with a different handler if necessary for a specific board.

Select a priority of 129 to indicate a higher than default priority, but
keep it as low as possible since PSCI reset is known to fail on some
boards.

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

diff --git a/drivers/firmware/psci.c b/drivers/firmware/psci.c
index 66a8793f3b37..ce9814462ce0 100644
--- a/drivers/firmware/psci.c
+++ b/drivers/firmware/psci.c
@@ -232,11 +232,18 @@ static int get_set_conduit_method(struct device_node *np)
 	return 0;
 }
 
-static void psci_sys_reset(enum reboot_mode reboot_mode, const char *cmd)
+static int psci_sys_reset(struct notifier_block *nb, unsigned long action,
+			  void *data)
 {
 	invoke_psci_fn(PSCI_0_2_FN_SYSTEM_RESET, 0, 0, 0);
+	return NOTIFY_DONE;
 }
 
+static struct notifier_block psci_sys_reset_nb = {
+	.notifier_call = psci_sys_reset,
+	.priority = 129,
+};
+
 static void psci_sys_poweroff(void)
 {
 	invoke_psci_fn(PSCI_0_2_FN_SYSTEM_OFF, 0, 0, 0);
@@ -513,7 +520,7 @@ static void __init psci_0_2_set_functions(void)
 
 	psci_ops.migrate_info_type = psci_migrate_info_type;
 
-	arm_pm_restart = psci_sys_reset;
+	register_restart_handler(&psci_sys_reset_nb);
 
 	pm_power_off = psci_sys_poweroff;
 }
-- 
2.11.0

  parent reply	other threads:[~2017-01-30 11:08 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-01-30 11:05 [PATCH 0/6] ARM, arm64: Remove arm_pm_restart() Thierry Reding
2017-01-30 11:05 ` Thierry Reding
2017-01-30 11:05 ` [PATCH 1/6] ARM: prima2: Register with kernel restart handler Thierry Reding
2017-01-30 11:05   ` Thierry Reding
2017-01-30 11:05 ` [PATCH 2/6] ARM: xen: " Thierry Reding
2017-01-30 11:05   ` Thierry Reding
2017-01-30 11:05 ` Thierry Reding [this message]
2017-01-30 11:05   ` [PATCH 3/6] drivers: firmware: psci: " Thierry Reding
2017-01-30 11:05 ` [PATCH 4/6] ARM: " Thierry Reding
2017-01-30 11:05   ` Thierry Reding
2017-01-30 11:05 ` [PATCH 5/6] ARM64: Remove arm_pm_restart() Thierry Reding
2017-01-30 11:05   ` Thierry Reding
2017-01-30 11:05 ` [PATCH 6/6] ARM: " Thierry Reding
2017-01-30 11:05   ` Thierry Reding
2019-09-14 15:25 ` [PATCH 0/6] ARM, arm64: " Guenter Roeck
2019-09-14 15:25   ` Guenter Roeck
2019-09-16  7:49   ` Arnd Bergmann
2019-09-16  7:49     ` Arnd Bergmann
2019-09-16 13:17     ` Guenter Roeck
2019-09-16 13:17       ` Guenter Roeck
2019-09-16 13:49       ` Thierry Reding
2019-09-16 13:49         ` Thierry Reding
2019-09-16 15:43         ` Guenter Roeck
2019-09-16 15:43           ` Guenter Roeck
2019-09-16 15:50           ` Thierry Reding
2019-09-16 15:50             ` Thierry Reding
2019-09-16 16:29             ` Arnd Bergmann
2019-09-16 16:29               ` Arnd Bergmann
2019-09-16 20:28               ` Thierry Reding
2019-09-16 20:28                 ` Thierry Reding
2019-09-17  0:41                 ` Alexandre Belloni
2019-09-17  0:41                   ` Alexandre Belloni
2019-09-17  7:01                 ` Arnd Bergmann
2019-09-17  7:01                   ` Arnd Bergmann
2019-09-17 13:06                   ` Guenter Roeck
2019-09-17 13:06                     ` Guenter Roeck
2019-10-15 14:51 [PATCH 0/6] ARM/arm64: arm_pm_restart removal Thierry Reding
2019-10-15 14:51 ` [PATCH 3/6] drivers: firmware: psci: Register with kernel restart handler Thierry Reding
2019-10-15 14:51   ` Thierry Reding
2019-10-16  7:46   ` Stefan Agner
2019-10-16  7:46     ` Stefan Agner

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