| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.14 032/110] x86/platform/intel-mid: Handle Intel Edison reboot correctly | Date | Wed, 7 Mar 2018 11:38:15 -0800 |
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4.14-stable review patch. If anyone has any objections, please let me know.
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From: Sebastian Panceac <sebastian@resin.io>
commit 028091f82eefd5e84f81cef81a7673016ecbe78b 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: bda7b072de99 ("x86/platform/intel-mid: Implement power off sequence") Signed-off-by: Sebastian Panceac <sebastian@resin.io> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Andy Shevchenko <andy.shevchenko@gmail.com> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/1519810849-15131-1-git-send-email-sebastian@resin.io Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- arch/x86/platform/intel-mid/intel-mid.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/platform/intel-mid/intel-mid.c +++ b/arch/x86/platform/intel-mid/intel-mid.c @@ -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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