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authorLudovic Barre <ludovic.barre@st.com>2019-03-25 18:01:39 +0100
committerMark Brown <broonie@kernel.org>2019-03-26 13:26:27 +0000
commita88eceb17ac7e8dc4ad9995681af61c8371668f4 (patch)
treea3c0b8f1458baea545416a4710aa6fbdecd420fe /drivers/spi/spi-stm32-qspi.c
parentcbd66c626e16743b05af807ad48012c0a097b9fb (diff)
downloadlinux-a88eceb17ac7e8dc4ad9995681af61c8371668f4.tar.bz2
spi: stm32-qspi: add spi_master_put in release function
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>
Diffstat (limited to 'drivers/spi/spi-stm32-qspi.c')
-rw-r--r--drivers/spi/spi-stm32-qspi.c46
1 files changed, 28 insertions, 18 deletions
diff --git a/drivers/spi/spi-stm32-qspi.c b/drivers/spi/spi-stm32-qspi.c
index 7879a523583c..9875139ef0cf 100644
--- a/drivers/spi/spi-stm32-qspi.c
+++ b/drivers/spi/spi-stm32-qspi.c
@@ -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;
-
- return 0;
+ if (!ret)
+ return 0;
-err_spi_register:
+err:
stm32_qspi_release(qspi);
-
return ret;
}