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X-OriginatorOrg: ti.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 30 Dec 2025 21:37:30.9626 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 08aa8d81-7e13-42fd-dc50-08de47eba2f3 X-MS-Exchange-CrossTenant-Id: e5b49634-450b-4709-8abb-1e2b19b982b7 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=e5b49634-450b-4709-8abb-1e2b19b982b7;Ip=[198.47.21.194];Helo=[flwvzet200.ext.ti.com] X-MS-Exchange-CrossTenant-AuthSource: CY4PEPF0000EE3F.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ5PPF0687F9010 For devices capable of out-of-band system wakeups via I/O daisy chaining, prevent sending wakeup constraints to the PM co-processor. This allows the system to enter deeper low power modes, as the device is not marked as requiring power. Replaces the logic from commit b06bc4727991 ("pmdomain: ti_sci: handle wake IRQs for IO daisy chain wakeups") since checking out-of-band wakeup will cover the same functionality. Detect out-of-band wakeup in the suspend path, and if it exists, skip sending the constraint. Signed-off-by: Kendall Willis --- Implementation -------------- This patch is intended to be implemented along with the following series. This patch has no dependencies on any of the other series: 1. "pmdomain: ti_sci: handle wakeup constraint for out-of-band wakeup" (this patch): Skips setting constraints for wakeup sources that have out-of-band wakeup capability. https://github.com/kwillis01/linux/commits/v6.19/uart-daisy-chain/pmdoma= in 2. "serial: 8250: omap: set out-of-band wakeup if wakeup pinctrl exists": Implements out-of-band wakeup from the UARTs for TI K3 SoCs https://github.com/kwillis01/linux/tree/v6.19/uart-daisy-chain/uart-wake= up 3. "arm64: dts: ti: k3-am62: Support Main UART wakeup": Implements the functionality to wakeup the system from the Main UART https://github.com/kwillis01/linux/tree/b4/uart-daisy-chain-dts Testing ------- Tested on a AM62P SK EVM board with all series and dependencies implemented. Suspend/resume verified with the Main UART wakeup source by entering a keypress on the console. This github branch has all the necessary patches to test the series using v6.19-rc1: https://github.com/kwillis01/linux/tree/v6.19/uart-daisy-chain/all --- drivers/pmdomain/ti/ti_sci_pm_domains.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/pmdomain/ti/ti_sci_pm_domains.c b/drivers/pmdomain/ti/= ti_sci_pm_domains.c index e5d1934f78d9ee0a02eb05aa1301cd5a59e134d6..18d33bc35dee1b3bf6107af1e41= 4db377d515199 100644 --- a/drivers/pmdomain/ti/ti_sci_pm_domains.c +++ b/drivers/pmdomain/ti/ti_sci_pm_domains.c @@ -91,8 +91,9 @@ static inline void ti_sci_pd_set_wkup_constraint(struct d= evice *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__); + if (device_out_band_wakeup(dev)) { + dev_dbg(dev, "%s: has out of band wakeup, not setting constraints\n", \ + __func__); return; } =20 --- base-commit: f8f9c1f4d0c7a64600e2ca312dec824a0bc2f1da change-id: 20251230-pmdomain-e71bed9b40f8 Best regards, --=20 Kendall Willis