linux-kernel - [PATCH 2/2] regulator: fixed: Set PROBE_PREFER

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Date:   Mon, 13 Mar 2023 11:18:20 -0700
From:   Douglas Anderson <dianders@...omium.org>
To:     Mark Brown <broonie@...nel.org>
Cc:     mka@...omium.org, christian@...lschutter.com,
        Douglas Anderson <dianders@...omium.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] regulator: fixed: Set PROBE_PREFER_ASYNCHRONOUS

As of commit 218320fec294 ("regulator: core: Fix off-on-delay-us for
always-on/boot-on regulators"), we now might have a big delay during
probe of fixed regulators. That can have a significant boot speed
impact. Let's mitigate this by preferring async probe for fixed
regulators. The regulator framework itself has no issues with
regulators probing in an asynchronous way. The fixed regulator driver
is fairly straightforward and also has no issues.

Signed-off-by: Douglas Anderson <dianders@...omium.org>
---

 drivers/regulator/fixed.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/regulator/fixed.c b/drivers/regulator/fixed.c
index 2a9867abba20..1927dc2d4cf8 100644
--- a/drivers/regulator/fixed.c
+++ b/drivers/regulator/fixed.c
@@ -334,6 +334,7 @@ static struct platform_driver regulator_fixed_voltage_driver = {
 	.probe		= reg_fixed_voltage_probe,
 	.driver		= {
 		.name		= "reg-fixed-voltage",
+		.probe_type	= PROBE_PREFER_ASYNCHRONOUS,
 		.of_match_table = of_match_ptr(fixed_of_match),
 	},
 };
-- 
2.40.0.rc1.284.g88254d51c5-goog