linux-kernel - [PATCH v2 1/2] platform/chrome: cros_ec: Pass firmware node to MFD device

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Date:   Mon, 25 Nov 2019 13:47:29 -0700
From:   Raul E Rangel <rrangel@...omium.org>
To:     enric.balletbo@...labora.com, Wolfram Sang <wsa@...-dreams.de>
Cc:     Akshu.Agrawal@....com, Raul E Rangel <rrangel@...omium.org>,
        Guenter Roeck <groeck@...omium.org>,
        linux-kernel@...r.kernel.org, Benson Leung <bleung@...omium.org>
Subject: [PATCH v2 1/2] platform/chrome: cros_ec: Pass firmware node to MFD device

cros_ec_dev needs to have a firmware node associated with it so mfd
cells can be properly bound to the correct ACPI/DT nodes.

Signed-off-by: Raul E Rangel <rrangel@...omium.org>
---

Before this patch:
$ find /sys/bus/platform/devices/cros-ec-* -iname firmware_node -exec ls -l '{}' \;
<nothing>

After this patch:
$ find /sys/bus/platform/devices/cros-ec-dev.0.auto/ -iname firmware_node -exec ls -l '{}' \;
/sys/bus/platform/devices/cros-ec-dev.0.auto/cros-ec-accel.1.auto/firmware_node -> ../../../../../../LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:1c/PNP0C09:00/GOOG0004:00
/sys/bus/platform/devices/cros-ec-dev.0.auto/cros-ec-chardev.7.auto/firmware_node -> ../../../../../../LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:1c/PNP0C09:00/GOOG0004:00
/sys/bus/platform/devices/cros-ec-dev.0.auto/cros-ec-debugfs.8.auto/firmware_node -> ../../../../../../LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:1c/PNP0C09:00/GOOG0004:00
/sys/bus/platform/devices/cros-ec-dev.0.auto/cros-ec-gyro.2.auto/firmware_node -> ../../../../../../LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:1c/PNP0C09:00/GOOG0004:00
/sys/bus/platform/devices/cros-ec-dev.0.auto/cros-ec-lid-angle.4.auto/firmware_node -> ../../../../../../LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:1c/PNP0C09:00/GOOG0004:00
/sys/bus/platform/devices/cros-ec-dev.0.auto/cros-ec-lightbar.9.auto/firmware_node -> ../../../../../../LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:1c/PNP0C09:00/GOOG0004:00
/sys/bus/platform/devices/cros-ec-dev.0.auto/cros-ec-pd-sysfs.10.auto/firmware_node -> ../../../../../../LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:1c/PNP0C09:00/GOOG0004:00
/sys/bus/platform/devices/cros-ec-dev.0.auto/cros-ec-ring.3.auto/firmware_node -> ../../../../../../LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:1c/PNP0C09:00/GOOG0004:00
/sys/bus/platform/devices/cros-ec-dev.0.auto/cros-ec-sysfs.11.auto/firmware_node -> ../../../../../../LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:1c/PNP0C09:00/GOOG0004:00
/sys/bus/platform/devices/cros-ec-dev.0.auto/cros-usbpd-charger.5.auto/firmware_node -> ../../../../../../LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:1c/PNP0C09:00/GOOG0004:00
/sys/bus/platform/devices/cros-ec-dev.0.auto/cros-usbpd-logger.6.auto/firmware_node -> ../../../../../../LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:1c/PNP0C09:00/GOOG0004:00
/sys/bus/platform/devices/cros-ec-dev.0.auto/firmware_node -> ../../../../../LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:1c/PNP0C09:00/GOOG0004:00

Changes in v2:
- Extracted platform_device_info into its own variable.

 drivers/platform/chrome/cros_ec.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/drivers/platform/chrome/cros_ec.c b/drivers/platform/chrome/cros_ec.c
index 51d76037f52a..bb11bc5f73fb 100644
--- a/drivers/platform/chrome/cros_ec.c
+++ b/drivers/platform/chrome/cros_ec.c
@@ -131,6 +131,15 @@ int cros_ec_register(struct cros_ec_device *ec_dev)
 {
 	struct device *dev = ec_dev->dev;
 	int err = 0;
+	struct platform_device_info ec_platform_info = {
+		.parent = ec_dev->dev,
+		.name = "cros-ec-dev",
+		.id = PLATFORM_DEVID_AUTO,
+		.data = &ec_p,
+		.size_data = sizeof(struct cros_ec_platform),
+		.fwnode = ec_dev->dev->fwnode,
+		.of_node_reused = 1
+	};
 
 	BLOCKING_INIT_NOTIFIER_HEAD(&ec_dev->event_notifier);
 
@@ -167,9 +176,8 @@ int cros_ec_register(struct cros_ec_device *ec_dev)
 	}
 
 	/* Register a platform device for the main EC instance */
-	ec_dev->ec = platform_device_register_data(ec_dev->dev, "cros-ec-dev",
-					PLATFORM_DEVID_AUTO, &ec_p,
-					sizeof(struct cros_ec_platform));
+	ec_dev->ec = platform_device_register_full(&ec_platform_info);
+
 	if (IS_ERR(ec_dev->ec)) {
 		dev_err(ec_dev->dev,
 			"Failed to create CrOS EC platform device\n");
-- 
2.24.0.432.g9d3f5f5b63-goog