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From: Billy Tsai <billy_tsai@aspeedtech.com>
To: Linus Walleij <linusw@kernel.org>,
	Bartosz Golaszewski <brgl@kernel.org>,
	Joel Stanley <joel@jms.id.au>,
	Andrew Jeffery <andrew@codeconstruct.com.au>,
	Rob Herring <robh@kernel.org>,
	Krzysztof Kozlowski <krzk+dt@kernel.org>,
	Conor Dooley <conor+dt@kernel.org>
Cc: <linux-gpio@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-aspeed@lists.ozlabs.org>, <linux-kernel@vger.kernel.org>,
	"Andrew Jeffery" <andrew@aj.id.au>, <devicetree@vger.kernel.org>,
	<bmc-sw@aspeedtech.com>, Billy Tsai <billy_tsai@aspeedtech.com>
Subject: [PATCH 1/5] gpio: aspeed-sgpio: Change the macro to support deferred probe
Date: Sat, 17 Jan 2026 19:17:08 +0800	[thread overview]
Message-ID: <20260117-upstream_sgpio-v1-1-850ef3ffb680@aspeedtech.com> (raw)
In-Reply-To: <20260117-upstream_sgpio-v1-0-850ef3ffb680@aspeedtech.com>

Use module_platform_driver() to replace module_platform_driver_probe().
The former utilizes platform_driver_register(), which allows the driver to
defer probing when it doesn't acquire the necessary resources due to probe
order. In contrast, the latter uses __platform_driver_probe(), which
includes the comment "Note that this is incompatible with deferred
probing." Since our SGPIO driver requires access to the clock resource, the
former is more suitable.

Signed-off-by: Billy Tsai <billy_tsai@aspeedtech.com>
---
 drivers/gpio/gpio-aspeed-sgpio.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/gpio/gpio-aspeed-sgpio.c b/drivers/gpio/gpio-aspeed-sgpio.c
index 7622f9e9f54a..318cd0e39741 100644
--- a/drivers/gpio/gpio-aspeed-sgpio.c
+++ b/drivers/gpio/gpio-aspeed-sgpio.c
@@ -516,7 +516,7 @@ static const struct of_device_id aspeed_sgpio_of_table[] = {
 
 MODULE_DEVICE_TABLE(of, aspeed_sgpio_of_table);
 
-static int __init aspeed_sgpio_probe(struct platform_device *pdev)
+static int aspeed_sgpio_probe(struct platform_device *pdev)
 {
 	u32 nr_gpios, sgpio_freq, sgpio_clk_div, gpio_cnt_regval, pin_mask;
 	const struct aspeed_sgpio_pdata *pdata;
@@ -611,11 +611,12 @@ static int __init aspeed_sgpio_probe(struct platform_device *pdev)
 }
 
 static struct platform_driver aspeed_sgpio_driver = {
+	.probe = aspeed_sgpio_probe,
 	.driver = {
 		.name = KBUILD_MODNAME,
 		.of_match_table = aspeed_sgpio_of_table,
 	},
 };
 
-module_platform_driver_probe(aspeed_sgpio_driver, aspeed_sgpio_probe);
+module_platform_driver(aspeed_sgpio_driver);
 MODULE_DESCRIPTION("Aspeed Serial GPIO Driver");

-- 
2.34.1



  reply	other threads:[~2026-01-17 11:17 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-01-17 11:17 [PATCH 0/5] Add Aspeed G7 sgpio support Billy Tsai
2026-01-17 11:17 ` Billy Tsai [this message]
2026-01-17 11:17 ` [PATCH 2/5] gpio: aspeed-sgpio: Remove unused bank name field Billy Tsai
2026-01-17 11:17 ` [PATCH 3/5] gpio: aspeed-sgpio: Create llops to handle hardware access Billy Tsai
2026-01-17 15:46   ` Andrew Lunn
2026-01-19  2:09     ` Billy Tsai
2026-01-19 14:20       ` Andrew Lunn
2026-01-19  2:39     ` Billy Tsai
2026-01-19  3:37       ` Billy Tsai
2026-01-17 11:17 ` [PATCH 4/5] dt-bindings: gpio: aspeed,sgpio: Support ast2700 Billy Tsai
2026-01-18 10:21   ` Krzysztof Kozlowski
2026-01-17 11:17 ` [PATCH 5/5] gpio: aspeed-sgpio: Support G7 Aspeed sgpiom controller Billy Tsai
2026-01-21 12:42 ` [PATCH 0/5] Add Aspeed G7 sgpio support Linus Walleij

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