Messages in this thread Patch in this message | | | From | Anson Huang <> | Subject | [PATCH 1/2] firmware: imx: make sure MU irq can wake up system from suspend mode | Date | Fri, 24 Apr 2020 07:07:10 +0800 |
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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> --- drivers/firmware/imx/imx-scu-irq.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/firmware/imx/imx-scu-irq.c b/drivers/firmware/imx/imx-scu-irq.c index db655e8..d9dcc20 100644 --- a/drivers/firmware/imx/imx-scu-irq.c +++ b/drivers/firmware/imx/imx-scu-irq.c @@ -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); } } -- 2.7.4
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