linux-kernel - Re: [PATCH v6 3/3] pmdomain: ti_sci: handle wake IRQs for IO daisy chain wakeups

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Message-ID: <20241210105517.ms7twggosr2rs72m@lcpd911>
Date: Tue, 10 Dec 2024 16:25:17 +0530
From: Dhruva Gole <d-gole@...com>
To: Kevin Hilman <khilman@...libre.com>
CC: Ulf Hansson <ulf.hansson@...aro.org>, <linux-pm@...r.kernel.org>,
        Nishanth
 Menon <nm@...com>, Akashdeep Kaur <a-kaur@...com>,
        Sebin Francis
	<sebin.francis@...com>,
        Markus Schneider-Pargmann <msp@...libre.com>,
        <linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v6 3/3] pmdomain: ti_sci: handle wake IRQs for IO daisy
 chain wakeups

On Dec 06, 2024 at 14:12:52 -0800, Kevin Hilman wrote:
> When a device supports IO daisy-chain wakeups, it uses a dedicated
> wake IRQ.  Devices with IO daisy-chain wakeups enabled should not set
> wakeup constraints since these can happen even from deep power states,
> so should not prevent the DM from picking deep power states.
> 
> Wake IRQs are set with dev_pm_set_wake_irq() or
> dev_pm_set_dedicated_wake_irq().  The latter is used by the serial
> driver used on K3 platforms (drivers/tty/serial/8250/8250_omap.c)
> when the interrupts-extended property is used to describe the
> dedicated wakeup interrupt.
> 
> Detect these wake IRQs in the suspend path, and if set, skip sending
> constraint.
> 
> Tested-by: Dhruva Gole <d-gole@...com>
> Signed-off-by: Kevin Hilman <khilman@...libre.com>
> ---

Reviewed-by: Dhruva Gole <d-gole@...com>


-- 
Best regards,
Dhruva Gole
Texas Instruments Incorporated