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Commit 05f0a97e authored by Paweł Anikiel's avatar Paweł Anikiel Committed by Greg Kroah-Hartman
Browse files

reset: socfpga: add empty driver allowing consumers to probe 



[ Upstream commit 3ad60b4b3570937f3278509fe6797a5093ce53f8 ]

The early reset driver doesn't ever probe, which causes consuming
devices to be unable to probe. Add an empty driver to set this device
as available, allowing consumers to probe.

Signed-off-by: default avatarPaweł Anikiel <pan@semihalf.com>
Link: https://lore.kernel.org/r/20210920124141.1166544-4-pan@semihalf.com


Signed-off-by: default avatarPhilipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent dfa8fb78

drivers/reset/reset-socfpga.c

+26 −0
Original line number Diff line number Diff line
@@ -86,3 +86,29 @@ void __init socfpga_reset_init(void) 
	for_each_matching_node(np, socfpga_early_reset_dt_ids)

		a10_reset_init(np);

}



/*

 * The early driver is problematic, because it doesn't register

 * itself as a driver. This causes certain device links to prevent

 * consumer devices from probing. The hacky solution is to register

 * an empty driver, whose only job is to attach itself to the reset

 * manager and call probe.

 */

static const struct of_device_id socfpga_reset_dt_ids[] = {

	{ .compatible = "altr,rst-mgr", },

	{ /* sentinel */ },

};



static int reset_simple_probe(struct platform_device *pdev)

{

	return 0;

}



static struct platform_driver reset_socfpga_driver = {

	.probe	= reset_simple_probe,

	.driver = {

		.name		= "socfpga-reset",

		.of_match_table	= socfpga_reset_dt_ids,

	},

};

builtin_platform_driver(reset_socfpga_driver);