linux-kernel - [PATCH v4 5/7] i2c: core: Move ACPI IRQ handling to probe time

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Message-ID: <20190611123101.25264-6-ckeepax@opensource.cirrus.com>
Date:   Tue, 11 Jun 2019 13:30:59 +0100
From:   Charles Keepax <ckeepax@...nsource.cirrus.com>
To:     <wsa@...-dreams.de>, <mika.westerberg@...ux.intel.com>
CC:     <jarkko.nikula@...ux.intel.com>,
        <andriy.shevchenko@...ux.intel.com>, <linux-i2c@...r.kernel.org>,
        <linux-acpi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <benjamin.tissoires@...hat.com>, <jbroadus@...il.com>,
        <patches@...nsource.cirrus.com>
Subject: [PATCH v4 5/7] i2c: core: Move ACPI IRQ handling to probe time

Bring the ACPI path in sync with the device tree path and handle all the
IRQ fetching at probe time. This leaves the only IRQ handling at device
registration time being that which is passed directly through the board
info as either a resource or an actual IRQ number.

Reviewed-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
Signed-off-by: Charles Keepax <ckeepax@...nsource.cirrus.com>
---

New since v3, but this patch and the previous one leave the code in
the same state as this patch did on v3.

Thanks,
Charles

 drivers/i2c/i2c-core-acpi.c | 7 -------
 drivers/i2c/i2c-core-base.c | 5 ++++-
 2 files changed, 4 insertions(+), 8 deletions(-)

diff --git a/drivers/i2c/i2c-core-acpi.c b/drivers/i2c/i2c-core-acpi.c
index 35966cc337dde..c70228f5349ef 100644
--- a/drivers/i2c/i2c-core-acpi.c
+++ b/drivers/i2c/i2c-core-acpi.c
@@ -171,8 +171,6 @@ int i2c_acpi_get_irq(struct i2c_client *client)
 	return irq;
 }
 
-static struct i2c_client *i2c_acpi_find_client_by_adev(struct acpi_device *adev);
-
 static int i2c_acpi_get_info(struct acpi_device *adev,
 			     struct i2c_board_info *info,
 			     struct i2c_adapter *adapter,
@@ -208,11 +206,6 @@ static int i2c_acpi_get_info(struct acpi_device *adev,
 	if (adapter_handle)
 		*adapter_handle = lookup.adapter_handle;
 
-	/* Then fill IRQ number if any */
-	ret = i2c_acpi_get_irq(i2c_acpi_find_client_by_adev(adev));
-	if (ret > 0)
-		info->irq = ret;
-
 	acpi_set_modalias(adev, dev_name(&adev->dev), info->type,
 			  sizeof(info->type));
 
diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c
index 67344586de913..9520bcfc83182 100644
--- a/drivers/i2c/i2c-core-base.c
+++ b/drivers/i2c/i2c-core-base.c
@@ -327,7 +327,10 @@ static int i2c_device_probe(struct device *dev)
 			if (irq == -EINVAL || irq == -ENODATA)
 				irq = of_irq_get(dev->of_node, 0);
 		} else if (ACPI_COMPANION(dev)) {
-			irq = acpi_dev_gpio_irq_get(ACPI_COMPANION(dev), 0);
+			irq = i2c_acpi_get_irq(client);
+
+			if (irq == -ENOENT)
+				irq = acpi_dev_gpio_irq_get(ACPI_COMPANION(dev), 0);
 		}
 		if (irq == -EPROBE_DEFER)
 			return irq;
-- 
2.11.0