Commit f70befc3 authored by Sebastian Panceac's avatar Sebastian Panceac Committed by Greg Kroah-Hartman

x86/platform/intel-mid: Handle Intel Edison reboot correctly

commit 028091f8 upstream.

When the Intel Edison module is powered with 3.3V, the reboot command makes
the module stuck.  If the module is powered at a greater voltage, like 4.4V
(as the Edison Mini Breakout board does), reboot works OK.

The official Intel Edison BSP sends the IPCMSG_COLD_RESET message to the
SCU by default. The IPCMSG_COLD_BOOT which is used by the upstream kernel
is only sent when explicitely selected on the kernel command line.

Use IPCMSG_COLD_RESET unconditionally which makes reboot work independent
of the power supply voltage.

[ tglx: Massaged changelog ]

Fixes: bda7b072 ("x86/platform/intel-mid: Implement power off sequence")
Signed-off-by: default avatarSebastian Panceac <sebastian@resin.io>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Acked-by: default avatarAndy Shevchenko <andy.shevchenko@gmail.com>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/1519810849-15131-1-git-send-email-sebastian@resin.ioSigned-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent e521a723
......@@ -79,7 +79,7 @@ static void intel_mid_power_off(void)
static void intel_mid_reboot(void)
{
intel_scu_ipc_simple_command(IPCMSG_COLD_BOOT, 0);
intel_scu_ipc_simple_command(IPCMSG_COLD_RESET, 0);
}
static unsigned long __init intel_mid_calibrate_tsc(void)
......
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