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From: Hamish Martin <hamish.martin@alliedtelesis.co.nz>
To: gupt21@gmail.com, jikos@kernel.org,
	benjamin.tissoires@redhat.com, Enrik.Berkhan@inka.de,
	sven.zuehlsdorf@vigem.de
Cc: linux-i2c@vger.kernel.org, linux-input@vger.kernel.org,
	Hamish Martin <hamish.martin@alliedtelesis.co.nz>
Subject: [PATCH 3/5] HID: mcp2221: Set ACPI companion
Date: Wed, 25 Oct 2023 16:55:12 +1300	[thread overview]
Message-ID: <20231025035514.3450123-4-hamish.martin@alliedtelesis.co.nz> (raw)
In-Reply-To: <20231025035514.3450123-1-hamish.martin@alliedtelesis.co.nz>

In scenarios where an I2C device tree is defined in ACPI and exists off
the MCP2221 I2C bus, the devices could not be instantiated.
Mark the USB port that the MCP2221 is connected to as its ACPI companion
so that the USB device can be bound to the ACPI tree when enumerated.
With this change the downstream I2C tree devices can be instantiated on
ACPI systems.

Signed-off-by: Hamish Martin <hamish.martin@alliedtelesis.co.nz>
---
 drivers/hid/hid-mcp2221.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/hid/hid-mcp2221.c b/drivers/hid/hid-mcp2221.c
index aef0785c91cc..a219cd2e3309 100644
--- a/drivers/hid/hid-mcp2221.c
+++ b/drivers/hid/hid-mcp2221.c
@@ -1156,6 +1156,7 @@ static int mcp2221_probe(struct hid_device *hdev,
 	mcp->adapter.algo = &mcp_i2c_algo;
 	mcp->adapter.retries = 1;
 	mcp->adapter.dev.parent = &hdev->dev;
+	ACPI_COMPANION_SET(&mcp->adapter.dev, ACPI_COMPANION(hdev->dev.parent));
 	snprintf(mcp->adapter.name, sizeof(mcp->adapter.name),
 			"MCP2221 usb-i2c bridge");
 
-- 
2.42.0


  parent reply	other threads:[~2023-10-25  3:55 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-10-25  3:55 [PATCH 0/5] MCP2221 Improvements Hamish Martin
2023-10-25  3:55 ` [PATCH 1/5] HID: mcp2221: Set driver data before I2C adapter add Hamish Martin
2023-10-25  3:55 ` [PATCH 2/5] HID: mcp2221: Allow IO to start during probe Hamish Martin
2023-10-25  3:55 ` Hamish Martin [this message]
2023-10-25  3:55 ` [PATCH 4/5] HID: mcp2221: Don't set bus speed on every transfer Hamish Martin
2023-10-25  3:55 ` [PATCH 5/5] HID: mcp2221: Handle reads greater than 60 bytes Hamish Martin
2023-11-21  8:31 ` [PATCH 0/5] MCP2221 Improvements Jiri Kosina

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