[PATCH v5 16/17] spi: zynq-qspi: Simplify clock handling with devm_clk_get_enabled()

Pei Xiao
2026-03-19T22:48:38Z

devm_clk_get_enabled() for both "pclk" and "ref_clk". This removes
the need for explicit clock enable and disable calls, as the managed
API automatically disables the clocks on device removal or probe
failure.

Remove the now-unnecessary clk_disable_unprepare() calls from the
probe error paths and the remove callback. Simplify error handling
by jumping directly to the remove_ctlr label.

Signed-off-by: Pei Xiao <xiaopei01@kylinos.cn>
---
drivers/spi/spi-zynq-qspi.c | 31 ++++++-------------------------
1 file changed, 6 insertions(+), 25 deletions(-)

diff --git a/drivers/spi/spi-zynq-qspi.c b/drivers/spi/spi-zynq-qspi.c
index 5232483c4a3a..8c3975030d0a 100644
--- a/drivers/spi/spi-zynq-qspi.c
+++ b/drivers/spi/spi-zynq-qspi.c
@@ -661,7 +661,7 @@ static int zynq_qspi_probe(struct platform_device *pdev)
goto remove_ctlr;
}

- xqspi->pclk = devm_clk_get(&pdev->dev, "pclk");
+ xqspi->pclk = devm_clk_get_enabled(&pdev->dev, "pclk");
if (IS_ERR(xqspi->pclk)) {
dev_err(&pdev->dev, "pclk clock not found.\n");
ret = PTR_ERR(xqspi->pclk);
@@ -670,36 +670,24 @@ static int zynq_qspi_probe(struct platform_device *pdev)

init_completion(&xqspi->data_completion);

- xqspi->refclk = devm_clk_get(&pdev->dev, "ref_clk");
+ xqspi->refclk = devm_clk_get_enabled(&pdev->dev, "ref_clk");
if (IS_ERR(xqspi->refclk)) {
dev_err(&pdev->dev, "ref_clk clock not found.\n");
ret = PTR_ERR(xqspi->refclk);
goto remove_ctlr;
}

- ret = clk_prepare_enable(xqspi->pclk);
- if (ret) {
- dev_err(&pdev->dev, "Unable to enable APB clock.\n");
- goto remove_ctlr;
- }
-
- ret = clk_prepare_enable(xqspi->refclk);
- if (ret) {
- dev_err(&pdev->dev, "Unable to enable device clock.\n");
- goto clk_dis_pclk;
- }
-
xqspi->irq = platform_get_irq(pdev, 0);
if (xqspi->irq < 0) {
ret = xqspi->irq;
- goto clk_dis_all;
+ goto remove_ctlr;
}
ret = devm_request_irq(&pdev->dev, xqspi->irq, zynq_qspi_irq,
0, pdev->name, xqspi);
if (ret != 0) {
ret = -ENXIO;
dev_err(&pdev->dev, "request_irq failed\n");
- goto clk_dis_all;
+ goto remove_ctlr;
}

ret = of_property_read_u32(np, "num-cs",
@@ -709,7 +697,7 @@ static int zynq_qspi_probe(struct platform_device *pdev)
} else if (num_cs > ZYNQ_QSPI_MAX_NUM_CS) {
ret = -EINVAL;
dev_err(&pdev->dev, "only 2 chip selects are available\n");
- goto clk_dis_all;
+ goto remove_ctlr;
} else {
ctlr->num_chipselect = num_cs;
}
@@ -728,15 +716,11 @@ static int zynq_qspi_probe(struct platform_device *pdev)
ret = devm_spi_register_controller(&pdev->dev, ctlr);
if (ret) {
dev_err(&pdev->dev, "devm_spi_register_controller failed\n");
- goto clk_dis_all;
+ goto remove_ctlr;
}

return ret;

-clk_dis_all:
- clk_disable_unprepare(xqspi->refclk);
-clk_dis_pclk:
- clk_disable_unprepare(xqspi->pclk);
remove_ctlr:
spi_controller_put(ctlr);

@@ -758,9 +742,6 @@ static void zynq_qspi_remove(struct platform_device *pdev)
struct zynq_qspi *xqspi = platform_get_drvdata(pdev);

zynq_qspi_write(xqspi, ZYNQ_QSPI_ENABLE_OFFSET, 0);
-
- clk_disable_unprepare(xqspi->refclk);
- clk_disable_unprepare(xqspi->pclk);
}

static const struct of_device_id zynq_qspi_of_match[] = {
--
2.25.1