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spi: stm32-qspi: add spi_master_put in release function

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This patch adds spi_master_put in release function
to drop the controller's refcount.

Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Ludovic Barre 2019-03-25 18:01:39 +01:00 committed by Mark Brown
parent cbd66c626e
commit a88eceb17a
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GPG Key ID: 24D68B725D5487D0
1 changed files with 28 additions and 18 deletions
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46
drivers/spi/spi-stm32-qspi.c
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@ -93,6 +93,7 @@ struct stm32_qspi_flash {
struct stm32_qspi {
struct device *dev;
struct spi_controller *ctrl;
void __iomem *io_base;
void __iomem *mm_base;
resource_size_t mm_size;
@ -400,6 +401,7 @@ static void stm32_qspi_release(struct stm32_qspi *qspi)
writel_relaxed(0, qspi->io_base + QSPI_CR);
mutex_destroy(&qspi->lock);
clk_disable_unprepare(qspi->clk);
spi_master_put(qspi->ctrl);
}
static int stm32_qspi_probe(struct platform_device *pdev)
@ -416,43 +418,54 @@ static int stm32_qspi_probe(struct platform_device *pdev)
return -ENOMEM;
qspi = spi_controller_get_devdata(ctrl);
qspi->ctrl = ctrl;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "qspi");
qspi->io_base = devm_ioremap_resource(dev, res);
if (IS_ERR(qspi->io_base))
return PTR_ERR(qspi->io_base);
if (IS_ERR(qspi->io_base)) {
ret = PTR_ERR(qspi->io_base);
goto err;
}
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "qspi_mm");
qspi->mm_base = devm_ioremap_resource(dev, res);
if (IS_ERR(qspi->mm_base))
return PTR_ERR(qspi->mm_base);
if (IS_ERR(qspi->mm_base)) {
ret = PTR_ERR(qspi->mm_base);
goto err;
}
qspi->mm_size = resource_size(res);
if (qspi->mm_size > STM32_QSPI_MAX_MMAP_SZ)
return -EINVAL;
if (qspi->mm_size > STM32_QSPI_MAX_MMAP_SZ) {
ret = -EINVAL;
goto err;
}
irq = platform_get_irq(pdev, 0);
ret = devm_request_irq(dev, irq, stm32_qspi_irq, 0,
dev_name(dev), qspi);
if (ret) {
dev_err(dev, "failed to request irq\n");
return ret;
goto err;
}
init_completion(&qspi->data_completion);
qspi->clk = devm_clk_get(dev, NULL);
if (IS_ERR(qspi->clk))
return PTR_ERR(qspi->clk);
if (IS_ERR(qspi->clk)) {
ret = PTR_ERR(qspi->clk);
goto err;
}
qspi->clk_rate = clk_get_rate(qspi->clk);
if (!qspi->clk_rate)
return -EINVAL;
if (!qspi->clk_rate) {
ret = -EINVAL;
goto err;
}
ret = clk_prepare_enable(qspi->clk);
if (ret) {
dev_err(dev, "can not enable the clock\n");
return ret;
goto err;
}
rstc = devm_reset_control_get_exclusive(dev, NULL);
@ -475,14 +488,11 @@ static int stm32_qspi_probe(struct platform_device *pdev)
ctrl->dev.of_node = dev->of_node;
ret = devm_spi_register_master(dev, ctrl);
if (ret)
goto err_spi_register;
if (!ret)
return 0;
return 0;
err_spi_register:
err:
stm32_qspi_release(qspi);
return ret;
}