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From: Lubomir Rintel <lkundrak@v3.sk>
To: Andy Shevchenko <andy@infradead.org>, Darren Hart <dvhart@infradead.org>
Cc: Rob Herring <robh+dt@kernel.org>,
	Russell King <linux@armlinux.org.uk>,
	Mark Rutland <mark.rutland@arm.com>,
	platform-driver-x86@vger.kernel.org, linux-pm@vger.kernel.org,
	Sebastian Reichel <sebastian.reichel@collabora.com>,
	Lubomir Rintel <lkundrak@v3.sk>
Subject: [PATCH v7 09/10] ARM: export arm_pm_restart
Date: Mon, 13 May 2019 09:56:40 +0200	[thread overview]
Message-ID: <20190513075641.1277716-10-lkundrak@v3.sk> (raw)
In-Reply-To: <20190513075641.1277716-1-lkundrak@v3.sk>

The OLPC XO 1.75 laptop is rebooted with a command to the Embedded
Controller. The EC driver should be a module, since most people don't need
it to be compiled in.

The EC driver can't use register_restart_handler() because handlers
registered with it are executed in atomic context and the XO 1.75 reboot
dance needs to block: the reboot is initiated by poking a GPIO ofter
which we need to wait for the EC to initiate a SPI transfer and finish
it.

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>

---
Changes since v4:
- Clarify why we need this

 arch/arm/kernel/reboot.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/kernel/reboot.c b/arch/arm/kernel/reboot.c
index 3b2aa9a9fe26..71016cf19b86 100644
--- a/arch/arm/kernel/reboot.c
+++ b/arch/arm/kernel/reboot.c
@@ -22,6 +22,7 @@ typedef void (*phys_reset_t)(unsigned long, bool);
  * Function pointers to optional machine specific functions
  */
 void (*arm_pm_restart)(enum reboot_mode reboot_mode, const char *cmd);
+EXPORT_SYMBOL_GPL(arm_pm_restart);
 void (*pm_power_off)(void);
 EXPORT_SYMBOL(pm_power_off);
 
-- 
2.21.0


  parent reply	other threads:[~2019-05-13  7:57 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-13  7:56 [PATCH v7 00/10] Add support for OLPC XO 1.75 Embedded Controller Lubomir Rintel
2019-05-13  7:56 ` [PATCH v7 01/10] dt-bindings: olpc,xo1.75-ec: Add OLPC XO-1.75 EC bindings Lubomir Rintel
2019-05-13  9:07   ` Pavel Machek
2019-05-13 13:18     ` Lubomir Rintel
2019-05-24 16:29       ` Andy Shevchenko
2019-08-01 19:27     ` OLPC in 5.3? was " Pavel Machek
2019-08-02 10:39       ` Lubomir Rintel
2019-08-03  8:47         ` Pavel Machek
2019-08-05 10:26           ` Lubomir Rintel
2019-08-07 12:31             ` Pavel Machek
2019-08-07 12:41               ` Lubomir Rintel
2019-05-13  7:56 ` [PATCH v7 02/10] Platform: OLPC: Remove an unused include Lubomir Rintel
2019-05-13  7:56 ` [PATCH v7 03/10] Platform: OLPC: Move EC-specific functionality out from x86 Lubomir Rintel
2019-05-13  7:56 ` [PATCH v7 04/10] Platform: OLPC: Avoid a warning if the EC didn't register yet Lubomir Rintel
2019-05-13  7:56 ` [PATCH v7 05/10] Platform: OLPC: Use BIT() and GENMASK() for event masks Lubomir Rintel
2019-05-13  7:56 ` [PATCH v7 06/10] Platform: OLPC: Add XO-1.75 EC driver Lubomir Rintel
2019-05-13  7:56 ` [PATCH v7 07/10] Platform: OLPC: Add a regulator for the DCON Lubomir Rintel
2019-05-13  7:56 ` [PATCH v7 08/10] power: supply: olpc_battery: Allow building the driver on non-x86 Lubomir Rintel
2019-05-13  7:56 ` Lubomir Rintel [this message]
2019-05-13  7:56 ` [PATCH v7 10/10] Platform: OLPC: Add restart support to XO-1.75 EC driver Lubomir Rintel

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