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Wed, 18 Feb 2026 00:12:39 -0800 (PST) Received: from hu-krichai-hyd.qualcomm.com ([202.46.23.25]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2ad1a9d624esm118123685ad.49.2026.02.18.00.12.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 18 Feb 2026 00:12:38 -0800 (PST) From: Krishna Chaitanya Chundru Date: Wed, 18 Feb 2026 13:42:23 +0530 Subject: [PATCH v7 1/3] PM: sleep: wakeirq: Add support for dedicated shared wake IRQ setup Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260218-wakeirq_support-v7-1-0d4689830207@oss.qualcomm.com> References: <20260218-wakeirq_support-v7-0-0d4689830207@oss.qualcomm.com> In-Reply-To: <20260218-wakeirq_support-v7-0-0d4689830207@oss.qualcomm.com> To: "Rafael J. Wysocki" , Len Brown , Pavel Machek , Greg Kroah-Hartman , Danilo Krummrich , Bjorn Helgaas , Bartosz Golaszewski , Linus Walleij , Bartosz Golaszewski , Linus Walleij Cc: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linux-gpio@vger.kernel.org, quic_vbadigan@quicinc.com, quic_mrana@quicinc.com, sherry.sun@nxp.com, driver-core@lists.linux.dev, Krishna Chaitanya Chundru X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1771402347; l=4919; i=krishna.chundru@oss.qualcomm.com; s=20230907; h=from:subject:message-id; bh=zi60RThwEC6uT58cj6Q/kkhix9+cyecfzrsXBYVuP1k=; b=noK8LQipAKG2D7C1FRq6ywjqy7FzAkbdoYSMHusSRkOVbJWZkG8O8YGXJVGOnOPjcZDn+4PLL FA48oqomtubDXYh3Cim6SO/3o29N4jvqzUymr5+J38HDqDQfqXnQHmC X-Developer-Key: i=krishna.chundru@oss.qualcomm.com; a=ed25519; pk=10CL2pdAKFyzyOHbfSWHCD0X0my7CXxj8gJScmn1FAg= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMjE4MDA3MSBTYWx0ZWRfX3j6ifJ0oJGT4 PoNrDzt4lCOu8Scz89vTV9Tuq3xXPlgR6et268pzG0qn8J3SP1pJjFNZiSijCDu2BW8GMXdA83D AEmsPboq/lqTlSTkPqTWTorMtX4Mv649jnjCsdIjGAjMEjlsuJg29ld6Zw9YmHwg+9IcEBrgZR1 lu3C7ExbFIGtBuXs0EVBm9Rc5mt69bX5Wyyv1q2c7czjNeemoN1igLUxVv4hIBqOHkOhyHkc1mE leoVbGz957wAe4Wdg2YNytWrnwJ4V+kyuYEAQLuyyamy7iJnjZb2+B/KLsC8qi91PGUzYY9KHrT UN3U1ceHmVUJohvbUlZIhmonh8zCja1r2KYwJWaKZyKNDwP8eZvUUACg4kxAJA0PJB5UwYRGZBo FVeABGYrXKonkVhMpTWNQbWaTMF9S56dHdlnMXT+7Txj2+xfeJRn5BEImJ1t3QhvlECDKc0BLiT yvo8JSBE5/GnZ0yI3Bg== X-Proofpoint-ORIG-GUID: PLeOI5Gj3XE4YP_zn1CF3EP_zbUwCeNC X-Proofpoint-GUID: PLeOI5Gj3XE4YP_zn1CF3EP_zbUwCeNC X-Authority-Analysis: v=2.4 cv=YdiwJgRf c=1 sm=1 tr=0 ts=69957478 cx=c_pps a=JL+w9abYAAE89/QcEU+0QA==:117 a=ZePRamnt/+rB5gQjfz0u9A==:17 a=IkcTkHD0fZMA:10 a=HzLeVaNsDn8A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=Mpw57Om8IfrbqaoTuvik:22 a=GgsMoib0sEa3-_RKJdDe:22 a=EUspDBNiAAAA:8 a=VwQbUJbxAAAA:8 a=GqrSgIjjxmp09zFQf4gA:9 a=QEXdDO2ut3YA:10 a=324X-CrmTo6CU4MGRt3R:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-02-17_04,2026-02-16_04,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 adultscore=0 spamscore=0 bulkscore=0 malwarescore=0 lowpriorityscore=0 clxscore=1015 priorityscore=1501 suspectscore=0 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2601150000 definitions=main-2602180071 Some devices require more flexibility when configuring their dedicated wake-up interrupts, such as support for IRQF_SHARED or other IRQ flags. This is particularly useful in PCIe systems where multiple endpoints (e.g., Wi-Fi and Bluetooth controllers) share a common WAKE# signal line which requests platform to re-establish power and reference clocks to the components. In such cases, drivers can use this new API dev_pm_set_dedicated_shared_wake_irq() to register a shared wake IRQ. Update the internal helper __dev_pm_set_dedicated_wake_irq() to accept an irq_flags argument. Modify the existing dev_pm_set_dedicated_wake_irq() and dev_pm_set_dedicated_wake_irq_reverse() to preserve current behavior. When IRQ registered with IRQF_SHARED we can't use IRQF_NO_AUTOEN flag, so after registering for irq, disable it explicitly. Signed-off-by: Krishna Chaitanya Chundru Acked-by: Rafael J. Wysocki (Intel) --- drivers/base/power/wakeirq.c | 39 ++++++++++++++++++++++++++++++++++----- include/linux/pm_wakeirq.h | 6 ++++++ 2 files changed, 40 insertions(+), 5 deletions(-) diff --git a/drivers/base/power/wakeirq.c b/drivers/base/power/wakeirq.c index c0809d18fc5406b224206e0c8e5028aa8f4183b0..a3ac133496d1aadd31a2a9517322f4ff1c5be7b4 100644 --- a/drivers/base/power/wakeirq.c +++ b/drivers/base/power/wakeirq.c @@ -171,7 +171,8 @@ static irqreturn_t handle_threaded_wake_irq(int irq, void *_wirq) return IRQ_HANDLED; } -static int __dev_pm_set_dedicated_wake_irq(struct device *dev, int irq, unsigned int flag) +static int __dev_pm_set_dedicated_wake_irq(struct device *dev, int irq, unsigned int flag, + unsigned int irq_flags) { struct wake_irq *wirq; int err; @@ -200,8 +201,7 @@ static int __dev_pm_set_dedicated_wake_irq(struct device *dev, int irq, unsigned * so we use a threaded irq. */ err = request_threaded_irq(irq, NULL, handle_threaded_wake_irq, - IRQF_ONESHOT | IRQF_NO_AUTOEN, - wirq->name, wirq); + IRQF_ONESHOT | irq_flags, wirq->name, wirq); if (err) goto err_free_name; @@ -237,7 +237,7 @@ static int __dev_pm_set_dedicated_wake_irq(struct device *dev, int irq, unsigned */ int dev_pm_set_dedicated_wake_irq(struct device *dev, int irq) { - return __dev_pm_set_dedicated_wake_irq(dev, irq, 0); + return __dev_pm_set_dedicated_wake_irq(dev, irq, 0, IRQF_NO_AUTOEN); } EXPORT_SYMBOL_GPL(dev_pm_set_dedicated_wake_irq); @@ -258,10 +258,39 @@ EXPORT_SYMBOL_GPL(dev_pm_set_dedicated_wake_irq); */ int dev_pm_set_dedicated_wake_irq_reverse(struct device *dev, int irq) { - return __dev_pm_set_dedicated_wake_irq(dev, irq, WAKE_IRQ_DEDICATED_REVERSE); + return __dev_pm_set_dedicated_wake_irq(dev, irq, WAKE_IRQ_DEDICATED_REVERSE, + IRQF_NO_AUTOEN); } EXPORT_SYMBOL_GPL(dev_pm_set_dedicated_wake_irq_reverse); +/** + * dev_pm_set_dedicated_shared_wake_irq - Request a dedicated shared wake-up interrupt + * @dev: Device entry + * @irq: Device wake-up interrupt + * @flags: Custom IRQ flags (e.g., IRQ_TYPE_EDGE_FALLING) + * + * This API sets up a threaded interrupt handler for a device that has + * a shared wake-up interrupt in addition to the device IO interrupt. It also + * sets IRQ flags like IRQ_TYPE_EDGE_FALLING passed by the caller. + * + * Returns 0 on success or a negative error code on failure. + */ +int dev_pm_set_dedicated_shared_wake_irq(struct device *dev, int irq, unsigned long flags) +{ + struct wake_irq *wirq; + int ret; + + ret = __dev_pm_set_dedicated_wake_irq(dev, irq, 0, IRQF_SHARED | flags); + if (ret) + return ret; + + wirq = dev->power.wakeirq; + disable_irq_nosync(wirq->irq); + + return 0; +} +EXPORT_SYMBOL_GPL(dev_pm_set_dedicated_shared_wake_irq); + /** * dev_pm_enable_wake_irq_check - Checks and enables wake-up interrupt * @dev: Device diff --git a/include/linux/pm_wakeirq.h b/include/linux/pm_wakeirq.h index 25b63ed51b765c2c6919f259668a12675330835e..61f1e840745b56baa57db37563e450cb2d757a85 100644 --- a/include/linux/pm_wakeirq.h +++ b/include/linux/pm_wakeirq.h @@ -11,6 +11,7 @@ extern int dev_pm_set_dedicated_wake_irq(struct device *dev, int irq); extern int dev_pm_set_dedicated_wake_irq_reverse(struct device *dev, int irq); extern void dev_pm_clear_wake_irq(struct device *dev); extern int devm_pm_set_wake_irq(struct device *dev, int irq); +extern int dev_pm_set_dedicated_shared_wake_irq(struct device *dev, int irq, unsigned long flags); #else /* !CONFIG_PM */ @@ -38,5 +39,10 @@ static inline int devm_pm_set_wake_irq(struct device *dev, int irq) return 0; } +static inline int dev_pm_set_dedicated_shared_wake_irq(struct device *dev, + int irq, unsigned long flags) +{ + return 0; +} #endif /* CONFIG_PM */ #endif /* _LINUX_PM_WAKEIRQ_H */ -- 2.34.1