linux-kernel - Re: [PATCH] memory/omap-gpmc: fixup wrongly hierarchy of the sub-devices

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Date: Sat, 2 Mar 2024 07:57:27 +0800
From: Brock Zheng <yzheng@...hyauld.com>
To: Roger Quadros <rogerq@...nel.org>
Cc: Andreas Kemnade <andreas@...nade.info>, 
	Tony Lindgren <tony@...mide.com>, Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>, 
	linux-omap@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] memory/omap-gpmc: fixup wrongly hierarchy of the
 sub-devices

Hi, all

Sorry for the wrong mail Content-Type. My Neomutt is not configured correctly.
Updated info here:

On TI-AM335x，my FPGA under GPMC local-bus can not work on 6.x kernel.

GPMC <--> FPGA  <--> sub-devices....

I found that the platform sub-devices are in wrongly organized
hierarchy.  The grandchildren are now under the GPMC device directly,
not under it's father(FPGA).

Signed-off-by: Brock.Zheng <yzheng@...hyauld.com>
---
 drivers/memory/omap-gpmc.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/memory/omap-gpmc.c b/drivers/memory/omap-gpmc.c
index 80d038884207..1f2568e43086 100644
--- a/drivers/memory/omap-gpmc.c
+++ b/drivers/memory/omap-gpmc.c
@@ -2175,6 +2175,7 @@ static int gpmc_probe_generic_child(struct platform_device *pdev,
	int ret, cs;
	u32 val;
	struct gpmc_device *gpmc = platform_get_drvdata(pdev);
+	struct platform_device *child_pdev = NULL;
 
	if (of_property_read_u32(child, "reg", &cs) < 0) {
		dev_err(&pdev->dev, "%pOF has no 'reg' property\n",
@@ -2330,11 +2331,12 @@ static int gpmc_probe_generic_child(struct platform_device *pdev,
 no_timings:
 
	/* create platform device, NULL on error or when disabled */
-	if (!of_platform_device_create(child, NULL, &pdev->dev))
+	child_pdev = of_platform_device_create(child, NULL, &pdev->dev);
+	if (!child_pdev)
		goto err_child_fail;
 
	/* create children and other common bus children */
-	if (of_platform_default_populate(child, NULL, &pdev->dev))
+	if (of_platform_default_populate(child, NULL, &child_pdev->dev))
		goto err_child_fail;
 
	return 0;
-- 
2.44.0