From: Kevin Hilman Date: Fri, 6 Dec 2024 22:12:52 +0000 (-0800) Subject: pmdomain: ti_sci: handle wake IRQs for IO daisy chain wakeups X-Git-Tag: v6.14-rc1~114^2~5 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=b06bc47279919628b328710f7767ea7a18a68973;p=thirdparty%2Fkernel%2Flinux.git pmdomain: ti_sci: handle wake IRQs for IO daisy chain wakeups 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 Signed-off-by: Kevin Hilman Reviewed-by: Dhruva Gole Message-ID: <20241206-lpm-v6-10-constraints-pmdomain-v6-3-833980158c68@baylibre.com> Signed-off-by: Ulf Hansson --- diff --git a/drivers/pmdomain/ti/ti_sci_pm_domains.c b/drivers/pmdomain/ti/ti_sci_pm_domains.c index 3249656d4dc1e..82df7e44250bb 100644 --- a/drivers/pmdomain/ti/ti_sci_pm_domains.c +++ b/drivers/pmdomain/ti/ti_sci_pm_domains.c @@ -87,6 +87,15 @@ static inline void ti_sci_pd_set_wkup_constraint(struct device *dev) int ret; if (device_may_wakeup(dev)) { + /* + * If device can wakeup using IO daisy chain wakeups, + * we do not want to set a constraint. + */ + if (dev->power.wakeirq) { + dev_dbg(dev, "%s: has wake IRQ, not setting constraints\n", __func__); + return; + } + ret = ti_sci->ops.pm_ops.set_device_constraint(ti_sci, pd->idx, TISCI_MSG_CONSTRAINT_SET); if (!ret)