linux-kernel - [PATCH v2 1/3] drivers: bus: simple-pm-bus: Populate simple MFD child devices

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Date:   Wed,  3 Aug 2022 09:24:19 +0800
From:   Liu Ying <victor.liu@....com>
To:     devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Cc:     robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        shawnguo@...nel.org, s.hauer@...gutronix.de, kernel@...gutronix.de,
        festevam@...il.com, linux-imx@....com, saravanak@...gle.com,
        gregkh@...uxfoundation.org, geert+renesas@...der.be,
        krzysztof.kozlowski@...aro.org
Subject: [PATCH v2 1/3] drivers: bus: simple-pm-bus: Populate simple MFD child devices

There could be simple MFD device(s) connected to a simple PM bus as child
node(s), like Freescale i.MX8qxp pixel link MSI bus. Add a child match
table as an argument to of_platform_populate() function call to specify
the simple MFD devices so that they can be populated.

Signed-off-by: Liu Ying <victor.liu@....com>
---
v1->v2:
* No change.

 drivers/bus/simple-pm-bus.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/bus/simple-pm-bus.c b/drivers/bus/simple-pm-bus.c
index 6b8d6257ed8a..ff5f8ca5c024 100644
--- a/drivers/bus/simple-pm-bus.c
+++ b/drivers/bus/simple-pm-bus.c
@@ -13,6 +13,11 @@
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 
+static const struct of_device_id simple_pm_bus_child_matches[] = {
+	{ .compatible = "simple-mfd", },
+	{}
+};
+
 static int simple_pm_bus_probe(struct platform_device *pdev)
 {
 	const struct device *dev = &pdev->dev;
@@ -49,7 +54,7 @@ static int simple_pm_bus_probe(struct platform_device *pdev)
 	pm_runtime_enable(&pdev->dev);
 
 	if (np)
-		of_platform_populate(np, NULL, lookup, &pdev->dev);
+		of_platform_populate(np, simple_pm_bus_child_matches, lookup, &pdev->dev);
 
 	return 0;
 }
-- 
2.25.1