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From: David Lechner <dlechner@baylibre.com>
To: linux-spi@vger.kernel.org, devicetree@vger.kernel.org
Cc: "David Lechner" <dlechner@baylibre.com>,
	"Mark Brown" <broonie@kernel.org>,
	"Rob Herring" <robh+dt@kernel.org>,
	"Krzysztof Kozlowski" <krzysztof.kozlowski+dt@linaro.org>,
	"Conor Dooley" <conor+dt@kernel.org>,
	"Michael Hennerich" <Michael.Hennerich@analog.com>,
	"Nuno Sá" <nuno.sa@analog.com>,
	"Lars-Peter Clausen" <lars@metafoo.de>,
	linux-kernel@vger.kernel.org
Subject: [PATCH 05/14] spi: axi-spi-engine: use devm action to reset hw on remove
Date: Fri, 17 Nov 2023 14:12:56 -0600	[thread overview]
Message-ID: <20231117-axi-spi-engine-series-1-v1-5-cc59db999b87@baylibre.com> (raw)
In-Reply-To: <20231117-axi-spi-engine-series-1-v1-0-cc59db999b87@baylibre.com>

This moves the reset of the hardware to a devm action in the AXI SPI
Engine driver. This will allow us to use devm on later calls in the
probe function while preserving the order during cleanup.

Signed-off-by: David Lechner <dlechner@baylibre.com>
---
 drivers/spi/spi-axi-spi-engine.c | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

diff --git a/drivers/spi/spi-axi-spi-engine.c b/drivers/spi/spi-axi-spi-engine.c
index 77c1c115448d..c18a4b34777e 100644
--- a/drivers/spi/spi-axi-spi-engine.c
+++ b/drivers/spi/spi-axi-spi-engine.c
@@ -461,6 +461,15 @@ static int spi_engine_transfer_one_message(struct spi_controller *host,
 	return 0;
 }
 
+static void spi_engine_release_hw(void *p)
+{
+	struct spi_engine *spi_engine = p;
+
+	writel_relaxed(0xff, spi_engine->base + SPI_ENGINE_REG_INT_PENDING);
+	writel_relaxed(0x00, spi_engine->base + SPI_ENGINE_REG_INT_ENABLE);
+	writel_relaxed(0x01, spi_engine->base + SPI_ENGINE_REG_RESET);
+}
+
 static int spi_engine_probe(struct platform_device *pdev)
 {
 	struct spi_engine *spi_engine;
@@ -506,6 +515,11 @@ static int spi_engine_probe(struct platform_device *pdev)
 	writel_relaxed(0xff, spi_engine->base + SPI_ENGINE_REG_INT_PENDING);
 	writel_relaxed(0x00, spi_engine->base + SPI_ENGINE_REG_INT_ENABLE);
 
+	ret = devm_add_action_or_reset(&pdev->dev, spi_engine_release_hw,
+				       spi_engine);
+	if (ret)
+		return ret;
+
 	ret = request_irq(irq, spi_engine_irq, 0, pdev->name, host);
 	if (ret)
 		return ret;
@@ -532,16 +546,11 @@ static int spi_engine_probe(struct platform_device *pdev)
 static void spi_engine_remove(struct platform_device *pdev)
 {
 	struct spi_controller *host = platform_get_drvdata(pdev);
-	struct spi_engine *spi_engine = spi_controller_get_devdata(host);
 	int irq = platform_get_irq(pdev, 0);
 
 	spi_unregister_controller(host);
 
 	free_irq(irq, host);
-
-	writel_relaxed(0xff, spi_engine->base + SPI_ENGINE_REG_INT_PENDING);
-	writel_relaxed(0x00, spi_engine->base + SPI_ENGINE_REG_INT_ENABLE);
-	writel_relaxed(0x01, spi_engine->base + SPI_ENGINE_REG_RESET);
 }
 
 static const struct of_device_id spi_engine_match_table[] = {

-- 
2.42.0


  parent reply	other threads:[~2023-11-17 20:13 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-11-17 20:12 [PATCH 00/14] spi: axi-spi-engine improvements David Lechner
2023-11-17 20:12 ` [PATCH 01/14] dt-bindings: spi: axi-spi-engine: convert to yaml David Lechner
2023-11-19 16:18   ` Rob Herring
2023-11-17 20:12 ` [PATCH 02/14] MAINTAINERS: add entry for AXI SPI Engine David Lechner
2023-11-17 20:44   ` David Lechner
2023-11-19 19:01     ` Lars-Peter Clausen
2023-11-17 20:12 ` [PATCH 03/14] spi: axi-spi-engine: simplify driver data allocation David Lechner
2023-11-17 20:12 ` [PATCH 04/14] spi: axi-spi-engine: use devm_spi_alloc_host() David Lechner
2023-11-17 20:12 ` David Lechner [this message]
2023-11-17 20:12 ` [PATCH 06/14] spi: axi-spi-engine: use devm_request_irq() David Lechner
2023-11-17 20:12 ` [PATCH 07/14] spi: axi-spi-engine: use devm_spi_register_controller() David Lechner
2023-11-17 20:12 ` [PATCH 08/14] spi: axi-spi-engine: check for valid clock rate David Lechner
2023-11-17 20:13 ` [PATCH 09/14] spi: axi-spi-engine: move msg state to new struct David Lechner
2023-11-18  3:55   ` kernel test robot
2023-11-17 20:13 ` [PATCH 10/14] spi: axi-spi-engine: use message_prepare/unprepare David Lechner
2023-11-17 20:13 ` [PATCH 11/14] spi: axi-spi-engine: remove completed_id from driver state David Lechner
2023-11-17 20:13 ` [PATCH 12/14] spi: axi-spi-engine: remove struct spi_engine::msg David Lechner
2023-11-17 20:13 ` [PATCH 13/14] spi: axi-spi-engine: add support for cs_off David Lechner
2023-11-17 20:13 ` [PATCH 14/14] spi: axi-spi-engine: add support for any word size David Lechner
2023-11-20 18:25 ` [PATCH 00/14] spi: axi-spi-engine improvements Mark Brown

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