linux-kernel - [PATCH] i2c: kempld: Support ACPI I2C device declaration

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Date:   Thu, 11 Aug 2022 09:21:41 +0100
From:   Chris Pringle <chris.pringle@...brix.com>
To:     wsa@...nel.org, Michael.Brunner@...tron.com,
        ingmar.klein@...tron.com
Cc:     chris.pringle@...brix.com, linux-i2c@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] i2c: kempld: Support ACPI I2C device declaration

Adds an ACPI companion to the KEMPLD I2C driver so that it correctly
detects any I2C devices nested under the KEMPLD's ACPI node (SBRG.CPLD).

This allows I2C devices attached to the KEMPLD I2C adapter to be declared
and instantiated via ACPI.

Signed-off-by: Chris Pringle <chris.pringle@...brix.com>
---
 drivers/i2c/busses/i2c-kempld.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/i2c/busses/i2c-kempld.c b/drivers/i2c/busses/i2c-kempld.c
index 5bbb7f0d7852..cf857cf22507 100644
--- a/drivers/i2c/busses/i2c-kempld.c
+++ b/drivers/i2c/busses/i2c-kempld.c
@@ -303,6 +303,7 @@ static int kempld_i2c_probe(struct platform_device *pdev)
 	i2c->dev = &pdev->dev;
 	i2c->adap = kempld_i2c_adapter;
 	i2c->adap.dev.parent = i2c->dev;
+	ACPI_COMPANION_SET(&i2c->adap.dev, ACPI_COMPANION(&pdev->dev));
 	i2c_set_adapdata(&i2c->adap, i2c);
 	platform_set_drvdata(pdev, i2c);
 
-- 
2.25.1