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firmware: imx: make sure MU irq can wake up system from suspend mode

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IRQF_NO_SUSPEND flag is set for MU IRQ of IPC work, but with this
flag set, IRQD_WAKEUP_ARMED flag will NOT be set during
suspend_device_irq() phase, then when MU IRQ arrives, it will NOT
wake up system from suspend.

To fix this issue, pm_system_wakeup() is called in general MU IRQ
handler to make sure system can be waked up when MU IRQ arrives.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Reviewed-by: Dong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
This commit is contained in:
Anson Huang 2020-04-24 07:07:10 +08:00 committed by Shawn Guo
parent b3a9e3b962
commit 0caf847975
1 changed files with 2 additions and 0 deletions
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2
drivers/firmware/imx/imx-scu-irq.c
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@ -10,6 +10,7 @@
#include <linux/firmware/imx/ipc.h>
#include <linux/firmware/imx/sci.h>
#include <linux/mailbox_client.h>
#include <linux/suspend.h>
#define IMX_SC_IRQ_FUNC_ENABLE 1
#define IMX_SC_IRQ_FUNC_STATUS 2
@ -91,6 +92,7 @@ static void imx_scu_irq_work_handler(struct work_struct *work)
if (!irq_status)
continue;
pm_system_wakeup();
imx_scu_irq_notifier_call_chain(irq_status, &i);
}
}