From: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
To: <tglx@linutronix.de>, <marc.zyngier@arm.com>, <lorenzo.pieralisi@arm.com>,
        <hanjun.guo@linaro.org>, <tomasz.nowicki@linaro.org>
CC: <rjw@rjwysocki.net>, <al.stone@linaro.org>, <catalin.marinas@arm.com>,
        <will.deacon@arm.com>, <msalter@redhat.com>, <grant.likely@linaro.org>,
        <leo.duran@amd.com>, <sherry.hurwitz@amd.com>,
        <linux-arm-kernel@lists.infradead.org>, <linux-kernel@vger.kernel.org>,
        <linux-acpi@vger.kernel.org>,
        Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Subject: [RFCv2 PATCH 4/8] acpi: gsi: Adding acpi_init_irq_alloc_info() hook
Date: Mon, 13 Jul 2015 16:14:20 +0700
Message-ID: <1436778864-17645-5-git-send-email-Suravee.Suthikulpanit@amd.com>
In-Reply-To: <1436778864-17645-1-git-send-email-Suravee.Suthikulpanit@amd.com>
References: <1436778864-17645-1-git-send-email-Suravee.Suthikulpanit@amd.com>
MIME-Version: 1.0
Content-Type: text/plain
SN1PR0201MB1502: X-MS-Exchange-Organization-RulesExecuted
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Jul 2015 09:15:10.8481
 (UTC)
X-MS-Exchange-CrossTenant-Id: fde4dada-be84-483f-92cc-e026cbee8e96
X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=fde4dada-be84-483f-92cc-e026cbee8e96;Ip=[165.204.84.221];Helo=[atltwp01.amd.com]
X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem
X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN1PR0201MB1502
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org
Content-Length: 2322
Lines: 82

This patch adds acpi_init_irq_alloc_info(), which is declared as
a weak symbol. This would allow arch-specific code to hook into
acpi_register_gsi().

Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
---
 drivers/acpi/gsi.c | 36 +++++++++++++++++++++++++++++++-----
 1 file changed, 31 insertions(+), 5 deletions(-)

diff --git a/drivers/acpi/gsi.c b/drivers/acpi/gsi.c
index 02c8408..01a14c5 100644
--- a/drivers/acpi/gsi.c
+++ b/drivers/acpi/gsi.c
@@ -62,6 +62,13 @@ int acpi_gsi_to_irq(u32 gsi, unsigned int *irq)
 }
 EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
 
+int __weak
+acpi_init_irq_alloc_info(struct irq_domain *domain, u32 gsi,
+			 unsigned int irq_type, void **info)
+{
+	return 0;
+}
+
 /**
  * acpi_register_gsi() - Map a GSI to a linux IRQ number
  * @dev: device for which IRQ has to be mapped
@@ -75,22 +82,41 @@ EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
 int acpi_register_gsi(struct device *dev, u32 gsi, int trigger,
 		      int polarity)
 {
-	int irq;
+	unsigned int irq;
 	unsigned int irq_type = acpi_gsi_get_irq_type(trigger, polarity);
+	struct irq_data *d = NULL;
+	void *info = NULL;
+	int err;
 
 	irq = irq_find_mapping(acpi_irq_domain, gsi);
 	if (irq > 0)
 		return irq;
 
-	irq = irq_domain_alloc_irqs(acpi_irq_domain, 1, dev_to_node(dev),
-				    &gsi);
+	err = acpi_init_irq_alloc_info(acpi_irq_domain, gsi, irq_type, &info);
+	if (err)
+		return err;
+
+	if (!info)
+		/* Default to pass gsi directly to allocate irq */
+		info = &gsi;
+
+	irq = irq_domain_alloc_irqs(acpi_irq_domain, 1, dev_to_node(dev), info);
 	if (irq <= 0)
 		return -EINVAL;
 
+	d = irq_domain_get_irq_data(acpi_irq_domain, irq);
+	if (!d)
+		return -EFAULT;
+
 	/* Set irq type if specified and different than the current one */
 	if (irq_type != IRQ_TYPE_NONE &&
-		irq_type != irq_get_trigger_type(irq))
-		irq_set_irq_type(irq, irq_type);
+	    irq_type != irq_get_trigger_type(irq)) {
+		if (d)
+			d->chip->irq_set_type(d, irq_type);
+		else
+			irq_set_irq_type(irq, irq_type);
+	}
+
 	return irq;
 }
 EXPORT_SYMBOL_GPL(acpi_register_gsi);
-- 
2.1.0

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/