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From: =?utf-8?q?Th=C3=A9o_Lebrun?= <theo.lebrun@bootlin.com>
Date: Fri, 09 Feb 2024 14:55:53 +0100
Subject: [PATCH v3 4/4] spi: cadence-qspi: add system-wide suspend and
 resume callbacks
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Message-Id: <20240209-cdns-qspi-pm-fix-v3-4-540ac222f26b@bootlin.com>
References: <20240209-cdns-qspi-pm-fix-v3-0-540ac222f26b@bootlin.com>
In-Reply-To: <20240209-cdns-qspi-pm-fix-v3-0-540ac222f26b@bootlin.com>
To: Mark Brown <broonie@kernel.org>, Apurva Nandan <a-nandan@ti.com>, 
 Dhruva Gole <d-gole@ti.com>
Cc: linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org, 
 Gregory CLEMENT <gregory.clement@bootlin.com>, 
 Vladimir Kondratiev <vladimir.kondratiev@mobileye.com>, 
 Thomas Petazzoni <thomas.petazzoni@bootlin.com>, 
 Tawfik Bayouk <tawfik.bayouk@mobileye.com>, 
 =?utf-8?q?Th=C3=A9o_Lebrun?= <theo.lebrun@bootlin.com>

Each SPI controller is expected to call the spi_controller_suspend() and
spi_controller_resume() callbacks at system-wide suspend and resume.

It (1) handles the kthread worker for queued controllers and (2) marks
the controller as suspended to have spi_sync() fail while the
controller is unavailable.

Those two operations do not require the controller to be active, we do
not need to increment the runtime PM usage counter.

Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
---
 drivers/spi/spi-cadence-quadspi.c | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi-cadence-quadspi.c b/drivers/spi/spi-cadence-quadspi.c
index ee14965142ba..f976681187b0 100644
--- a/drivers/spi/spi-cadence-quadspi.c
+++ b/drivers/spi/spi-cadence-quadspi.c
@@ -1949,8 +1949,24 @@ static int cqspi_runtime_resume(struct device *dev)
 	return 0;
 }
 
-static DEFINE_RUNTIME_DEV_PM_OPS(cqspi_dev_pm_ops, cqspi_runtime_suspend,
-				 cqspi_runtime_resume, NULL);
+static int cqspi_suspend(struct device *dev)
+{
+	struct cqspi_st *cqspi = dev_get_drvdata(dev);
+
+	return spi_controller_suspend(cqspi->host);
+}
+
+static int cqspi_resume(struct device *dev)
+{
+	struct cqspi_st *cqspi = dev_get_drvdata(dev);
+
+	return spi_controller_resume(cqspi->host);
+}
+
+static const struct dev_pm_ops cqspi_dev_pm_ops = {
+	SET_RUNTIME_PM_OPS(cqspi_runtime_suspend, cqspi_runtime_resume, NULL)
+	SET_SYSTEM_SLEEP_PM_OPS(cqspi_suspend, cqspi_resume)
+};
 
 static const struct cqspi_driver_platdata cdns_qspi = {
 	.quirks = CQSPI_DISABLE_DAC_MODE,

-- 
2.43.0