From: Tetsuyuki Kobayashi <koba@kmckk.co.jp>
Date: Fri, 20 Jul 2012 06:16:30 +0000 (+0900)
Subject: ARM: shmobile: kzm9g: enable restarting
X-Git-Tag: firefly_0821_release~3680^2~1964^2~12^2~1
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=7952717adb69efc1d2443a1858f96d23c2fb93e0;p=firefly-linux-kernel-4.4.55.git

ARM: shmobile: kzm9g: enable restarting

Do soft-power-on-reset in sys_reboot system call.

How to test this patch
  Execute "sudo reboot" from command line. The system will start shutdown
  sequence and finally reboot and U-Boot restarts.

Cc: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Cc: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Tetsuyuki Kobayashi <koba@kmckk.co.jp>
Signed-off-by: Simon Horman <horms@verge.net.au>
---

diff --git a/arch/arm/mach-shmobile/board-kzm9g.c b/arch/arm/mach-shmobile/board-kzm9g.c
index 53b7ea92c32c..fd21fb6f9953 100644
--- a/arch/arm/mach-shmobile/board-kzm9g.c
+++ b/arch/arm/mach-shmobile/board-kzm9g.c
@@ -763,6 +763,13 @@ static void __init kzm_init(void)
 	platform_add_devices(kzm_devices, ARRAY_SIZE(kzm_devices));
 }
 
+static void kzm9g_restart(char mode, const char *cmd)
+{
+#define RESCNT2 0xe6188020
+	/* Do soft power on reset */
+	writel((1 << 31), RESCNT2);
+}
+
 static const char *kzm9g_boards_compat_dt[] __initdata = {
 	"renesas,kzm9g",
 	NULL,
@@ -777,5 +784,6 @@ DT_MACHINE_START(KZM9G_DT, "kzm9g")
 	.init_machine	= kzm_init,
 	.init_late	= shmobile_init_late,
 	.timer		= &shmobile_timer,
+	.restart	= kzm9g_restart,
 	.dt_compat	= kzm9g_boards_compat_dt,
 MACHINE_END