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Wysocki" , Rob Herring , Saravana Kannan , Greg Kroah-Hartman , Sven Peter , Janne Grunau , Suzuki K Poulose , James Clark , Jonathan Cameron , Jinjie Ruan , Alexandru Elisei Subject: [PATCH v4 03/26] of/irq: Add IRQ affinity reporting interface Date: Mon, 20 Oct 2025 13:29:20 +0100 Message-ID: <20251020122944.3074811-4-maz@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20251020122944.3074811-1-maz@kernel.org> References: <20251020122944.3074811-1-maz@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-acpi@vger.kernel.org, tglx@linutronix.de, mark.rutland@arm.com, will@kernel.org, rafael@kernel.org, robh@kernel.org, saravanak@google.com, gregkh@linuxfoundation.org, sven@kernel.org, j@jannau.net, suzuki.poulose@arm.com, james.clark@linaro.org, jonathan.cameron@huawei.com, ruanjinjie@huawei.com, alexandru.elisei@arm.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251020_133031_802412_A9ED0BF4 X-CRM114-Status: GOOD ( 14.27 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Plug the irq_populate_fwspec_info() helper into the OF layer to offer an IRQ affinity reporting function. Reviewed-by: Jonathan Cameron Tested-by: Will Deacon Signed-off-by: Marc Zyngier --- drivers/of/irq.c | 20 ++++++++++++++++++++ include/linux/of_irq.h | 7 +++++++ 2 files changed, 27 insertions(+) diff --git a/drivers/of/irq.c b/drivers/of/irq.c index 65c3c23255b74..168fde921bd27 100644 --- a/drivers/of/irq.c +++ b/drivers/of/irq.c @@ -479,6 +479,26 @@ int of_irq_get(struct device_node *dev, int index) } EXPORT_SYMBOL_GPL(of_irq_get); +const struct cpumask *of_irq_get_affinity(struct device_node *dev, int index) +{ + struct of_phandle_args oirq; + struct irq_fwspec_info info; + struct irq_fwspec fwspec; + int rc; + + rc = of_irq_parse_one(dev, index, &oirq); + if (rc) + return NULL; + + of_phandle_args_to_fwspec(oirq.np, oirq.args, oirq.args_count, + &fwspec); + + if (irq_populate_fwspec_info(&fwspec, &info)) + return NULL; + + return info.affinity; +} + /** * of_irq_get_byname - Decode a node's IRQ and return it as a Linux IRQ number * @dev: pointer to device tree node diff --git a/include/linux/of_irq.h b/include/linux/of_irq.h index 1db8543dfc8a6..1c2bc02818071 100644 --- a/include/linux/of_irq.h +++ b/include/linux/of_irq.h @@ -43,6 +43,8 @@ extern int of_irq_parse_one(struct device_node *device, int index, struct of_phandle_args *out_irq); extern int of_irq_count(struct device_node *dev); extern int of_irq_get(struct device_node *dev, int index); +extern const struct cpumask *of_irq_get_affinity(struct device_node *dev, + int index); extern int of_irq_get_byname(struct device_node *dev, const char *name); extern int of_irq_to_resource_table(struct device_node *dev, struct resource *res, int nr_irqs); @@ -76,6 +78,11 @@ static inline int of_irq_get_byname(struct device_node *dev, const char *name) { return 0; } +static inline const struct cpumask *of_irq_get_affinity(struct device_node *dev, + int index) +{ + return NULL; +} static inline int of_irq_to_resource_table(struct device_node *dev, struct resource *res, int nr_irqs) { -- 2.47.3