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 04/14] spi: axi-spi-engine: use devm_spi_alloc_host()
Date: Fri, 17 Nov 2023 14:12:55 -0600 [thread overview]
Message-ID: <20231117-axi-spi-engine-series-1-v1-4-cc59db999b87@baylibre.com> (raw)
In-Reply-To: <20231117-axi-spi-engine-series-1-v1-0-cc59db999b87@baylibre.com>
This modifies the AXI SPI Engine driver to use devm_spi_alloc_host()
instead of spi_alloc_host() to simplify the code a bit.
In addition to simplifying the error paths in the probe function, we
can also remove spi_controller_get/put() calls in the remove function
since devm_spi_alloc_host() sets a flag to no longer decrement the
controller reference count in the spi_unregister_controller() function.
Signed-off-by: David Lechner <dlechner@baylibre.com>
---
drivers/spi/spi-axi-spi-engine.c | 31 ++++++++++---------------------
1 file changed, 10 insertions(+), 21 deletions(-)
diff --git a/drivers/spi/spi-axi-spi-engine.c b/drivers/spi/spi-axi-spi-engine.c
index bdf0aa4ceb1d..77c1c115448d 100644
--- a/drivers/spi/spi-axi-spi-engine.c
+++ b/drivers/spi/spi-axi-spi-engine.c
@@ -473,7 +473,7 @@ static int spi_engine_probe(struct platform_device *pdev)
if (irq < 0)
return irq;
- host = spi_alloc_host(&pdev->dev, sizeof(*spi_engine));
+ host = devm_spi_alloc_host(&pdev->dev, sizeof(*spi_engine));
if (!host)
return -ENOMEM;
@@ -482,22 +482,16 @@ static int spi_engine_probe(struct platform_device *pdev)
spin_lock_init(&spi_engine->lock);
spi_engine->clk = devm_clk_get_enabled(&pdev->dev, "s_axi_aclk");
- if (IS_ERR(spi_engine->clk)) {
- ret = PTR_ERR(spi_engine->clk);
- goto err_put_host;
- }
+ if (IS_ERR(spi_engine->clk))
+ return PTR_ERR(spi_engine->clk);
spi_engine->ref_clk = devm_clk_get_enabled(&pdev->dev, "spi_clk");
- if (IS_ERR(spi_engine->ref_clk)) {
- ret = PTR_ERR(spi_engine->ref_clk);
- goto err_put_host;
- }
+ if (IS_ERR(spi_engine->ref_clk))
+ return PTR_ERR(spi_engine->ref_clk);
spi_engine->base = devm_platform_ioremap_resource(pdev, 0);
- if (IS_ERR(spi_engine->base)) {
- ret = PTR_ERR(spi_engine->base);
- goto err_put_host;
- }
+ if (IS_ERR(spi_engine->base))
+ return PTR_ERR(spi_engine->base);
version = readl(spi_engine->base + SPI_ENGINE_REG_VERSION);
if (SPI_ENGINE_VERSION_MAJOR(version) != 1) {
@@ -505,8 +499,7 @@ static int spi_engine_probe(struct platform_device *pdev)
SPI_ENGINE_VERSION_MAJOR(version),
SPI_ENGINE_VERSION_MINOR(version),
SPI_ENGINE_VERSION_PATCH(version));
- ret = -ENODEV;
- goto err_put_host;
+ return -ENODEV;
}
writel_relaxed(0x00, spi_engine->base + SPI_ENGINE_REG_RESET);
@@ -515,7 +508,7 @@ static int spi_engine_probe(struct platform_device *pdev)
ret = request_irq(irq, spi_engine_irq, 0, pdev->name, host);
if (ret)
- goto err_put_host;
+ return ret;
host->dev.of_node = pdev->dev.of_node;
host->mode_bits = SPI_CPOL | SPI_CPHA | SPI_3WIRE;
@@ -533,14 +526,12 @@ static int spi_engine_probe(struct platform_device *pdev)
return 0;
err_free_irq:
free_irq(irq, host);
-err_put_host:
- spi_controller_put(host);
return ret;
}
static void spi_engine_remove(struct platform_device *pdev)
{
- struct spi_controller *host = spi_controller_get(platform_get_drvdata(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);
@@ -548,8 +539,6 @@ static void spi_engine_remove(struct platform_device *pdev)
free_irq(irq, host);
- spi_controller_put(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);
--
2.42.0
next prev 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 ` David Lechner [this message]
2023-11-17 20:12 ` [PATCH 05/14] spi: axi-spi-engine: use devm action to reset hw on remove David Lechner
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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