linux-kernel - [PATCH] i2c: ocores: Move system PM hooks to the NOIRQ phase

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Message-Id: <20230717203857.2626773-1-samuel.holland@sifive.com>
Date:   Mon, 17 Jul 2023 13:38:57 -0700
From:   Samuel Holland <samuel.holland@...ive.com>
To:     Peter Korsgaard <peter@...sgaard.com>, Andrew Lunn <andrew@...n.ch>
Cc:     Samuel Holland <samuel.holland@...ive.com>,
        Andi Shyti <andi.shyti@...nel.org>, linux-i2c@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] i2c: ocores: Move system PM hooks to the NOIRQ phase

When an I2C device contains a wake IRQ subordinate to a regmap-irq chip,
the regmap-irq code must be able to perform I2C transactions during
suspend_device_irqs() and resume_device_irqs(). Therefore, the bus must
be suspended/resumed during the NOIRQ phase.

Signed-off-by: Samuel Holland <samuel.holland@...ive.com>
---

 drivers/i2c/busses/i2c-ocores.c | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/drivers/i2c/busses/i2c-ocores.c b/drivers/i2c/busses/i2c-ocores.c
index 4ac77e57bbbf..b1f621d42910 100644
--- a/drivers/i2c/busses/i2c-ocores.c
+++ b/drivers/i2c/busses/i2c-ocores.c
@@ -743,7 +743,6 @@ static void ocores_i2c_remove(struct platform_device *pdev)
 	i2c_del_adapter(&i2c->adap);
 }
 
-#ifdef CONFIG_PM_SLEEP
 static int ocores_i2c_suspend(struct device *dev)
 {
 	struct ocores_i2c *i2c = dev_get_drvdata(dev);
@@ -772,11 +771,9 @@ static int ocores_i2c_resume(struct device *dev)
 	return ocores_init(dev, i2c);
 }
 
-static SIMPLE_DEV_PM_OPS(ocores_i2c_pm, ocores_i2c_suspend, ocores_i2c_resume);
-#define OCORES_I2C_PM	(&ocores_i2c_pm)
-#else
-#define OCORES_I2C_PM	NULL
-#endif
+static const struct dev_pm_ops ocores_i2c_pm_ops = {
+	NOIRQ_SYSTEM_SLEEP_PM_OPS(ocores_i2c_suspend, ocores_i2c_resume)
+};
 
 static struct platform_driver ocores_i2c_driver = {
 	.probe   = ocores_i2c_probe,
@@ -784,7 +781,7 @@ static struct platform_driver ocores_i2c_driver = {
 	.driver  = {
 		.name = "ocores-i2c",
 		.of_match_table = ocores_i2c_match,
-		.pm = OCORES_I2C_PM,
+		.pm = &ocores_i2c_pm_ops,
 	},
 };
 
-- 
2.40.1