[PATCH 6.6 035/301] spi: spi-axi-spi-engine: Use helper function devm_clk_get_enabled()

Greg Kroah-Hartman
2024-05-14T10:59:49Z

From: Li Zetao <lizetao1@huawei.com>

[ Upstream commit a08199b309f833fd4221ab5ee2391c791fe26385 ]

Since commit 7ef9651e9792 ("clk: Provide new devm_clk helpers for prepared
and enabled clocks"), devm_clk_get() and clk_prepare_enable() can now be
replaced by devm_clk_get_enabled() when driver enables (and possibly
prepares) the clocks for the whole lifetime of the device. Moreover, it is
no longer necessary to unprepare and disable the clocks explicitly.

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Li Zetao <lizetao1@huawei.com>
Link: https://lore.kernel.org/r/20230823133938.1359106-6-lizetao1@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Stable-dep-of: 0064db9ce4aa ("spi: axi-spi-engine: fix version format string")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/spi/spi-axi-spi-engine.c | 25 +++++--------------------
1 file changed, 5 insertions(+), 20 deletions(-)

diff --git a/drivers/spi/spi-axi-spi-engine.c b/drivers/spi/spi-axi-spi-engine.c
index 0258c9a72fdcc..b96e55f59d1a9 100644
--- a/drivers/spi/spi-axi-spi-engine.c
+++ b/drivers/spi/spi-axi-spi-engine.c
@@ -485,30 +485,22 @@ static int spi_engine_probe(struct platform_device *pdev)

spin_lock_init(&spi_engine->lock);

- spi_engine->clk = devm_clk_get(&pdev->dev, "s_axi_aclk");
+ 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;
}

- spi_engine->ref_clk = devm_clk_get(&pdev->dev, "spi_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;
}

- ret = clk_prepare_enable(spi_engine->clk);
- if (ret)
- goto err_put_host;
-
- ret = clk_prepare_enable(spi_engine->ref_clk);
- if (ret)
- goto err_clk_disable;
-
spi_engine->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(spi_engine->base)) {
ret = PTR_ERR(spi_engine->base);
- goto err_ref_clk_disable;
+ goto err_put_host;
}

version = readl(spi_engine->base + SPI_ENGINE_REG_VERSION);
@@ -518,7 +510,7 @@ static int spi_engine_probe(struct platform_device *pdev)
SPI_ENGINE_VERSION_MINOR(version),
SPI_ENGINE_VERSION_PATCH(version));
ret = -ENODEV;
- goto err_ref_clk_disable;
+ goto err_put_host;
}

writel_relaxed(0x00, spi_engine->base + SPI_ENGINE_REG_RESET);
@@ -527,7 +519,7 @@ static int spi_engine_probe(struct platform_device *pdev)

ret = request_irq(irq, spi_engine_irq, 0, pdev->name, host);
if (ret)
- goto err_ref_clk_disable;
+ goto err_put_host;

host->dev.of_node = pdev->dev.of_node;
host->mode_bits = SPI_CPOL | SPI_CPHA | SPI_3WIRE;
@@ -545,10 +537,6 @@ static int spi_engine_probe(struct platform_device *pdev)
return 0;
err_free_irq:
free_irq(irq, host);
-err_ref_clk_disable:
- clk_disable_unprepare(spi_engine->ref_clk);
-err_clk_disable:
- clk_disable_unprepare(spi_engine->clk);
err_put_host:
spi_controller_put(host);
return ret;
@@ -569,9 +557,6 @@ static void spi_engine_remove(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);
writel_relaxed(0x01, spi_engine->base + SPI_ENGINE_REG_RESET);
-
- clk_disable_unprepare(spi_engine->ref_clk);
- clk_disable_unprepare(spi_engine->clk);
}

static const struct of_device_id spi_engine_match_table[] = {
--
2.43.0