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Subject[PATCH v2] uio: pruss: use devm_clk_get() for clk init
Date
This change uses devm_clk_get() to obtain a reference to the clock. It has
the benefit that clk_put() is no longer required, and cleans up the exit &
error path.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
---

Changelog v1 -> v2:
* reverted silly/goofed `return ret` to `return PTR_ERR(gdev->pruss_clk);`
this caused a warning about `ret` being uninitialized

drivers/uio/uio_pruss.c | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/uio/uio_pruss.c b/drivers/uio/uio_pruss.c
index 41470c4dba02..e9096f53b4cc 100644
--- a/drivers/uio/uio_pruss.c
+++ b/drivers/uio/uio_pruss.c
@@ -110,7 +110,6 @@ static void pruss_cleanup(struct device *dev, struct uio_pruss_dev *gdev)
gdev->sram_vaddr,
sram_pool_sz);
clk_disable(gdev->pruss_clk);
- clk_put(gdev->pruss_clk);
}

static int pruss_probe(struct platform_device *pdev)
@@ -131,7 +130,7 @@ static int pruss_probe(struct platform_device *pdev)
return -ENOMEM;

/* Power on PRU in case its not done as part of boot-loader */
- gdev->pruss_clk = clk_get(dev, "pruss");
+ gdev->pruss_clk = devm_clk_get(dev, "pruss");
if (IS_ERR(gdev->pruss_clk)) {
dev_err(dev, "Failed to get clock\n");
return PTR_ERR(gdev->pruss_clk);
@@ -140,7 +139,7 @@ static int pruss_probe(struct platform_device *pdev)
ret = clk_enable(gdev->pruss_clk);
if (ret) {
dev_err(dev, "Failed to enable clock\n");
- goto err_clk_put;
+ return ret;
}

regs_prussio = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -229,8 +228,6 @@ static int pruss_probe(struct platform_device *pdev)
gen_pool_free(gdev->sram_pool, gdev->sram_vaddr, sram_pool_sz);
err_clk_disable:
clk_disable(gdev->pruss_clk);
-err_clk_put:
- clk_put(gdev->pruss_clk);

return ret;
}
--
2.17.1
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