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-rw-r--r--drivers/spi/spi-bcm-qspi.c34
-rw-r--r--drivers/spi/spi-bcm2835.c24
-rw-r--r--drivers/spi/spi-bcm2835aux.c21
-rw-r--r--drivers/spi/spi.c58
4 files changed, 84 insertions, 53 deletions
diff --git a/drivers/spi/spi-bcm-qspi.c b/drivers/spi/spi-bcm-qspi.c
index 14c9d0133bce..c028446c7460 100644
--- a/drivers/spi/spi-bcm-qspi.c
+++ b/drivers/spi/spi-bcm-qspi.c
@@ -1327,7 +1327,7 @@ int bcm_qspi_probe(struct platform_device *pdev,
data = of_id->data;
- master = spi_alloc_master(dev, sizeof(struct bcm_qspi));
+ master = devm_spi_alloc_master(dev, sizeof(struct bcm_qspi));
if (!master) {
dev_err(dev, "error allocating spi_master\n");
return -ENOMEM;
@@ -1367,21 +1367,17 @@ int bcm_qspi_probe(struct platform_device *pdev,
if (res) {
qspi->base[MSPI] = devm_ioremap_resource(dev, res);
- if (IS_ERR(qspi->base[MSPI])) {
- ret = PTR_ERR(qspi->base[MSPI]);
- goto qspi_resource_err;
- }
+ if (IS_ERR(qspi->base[MSPI]))
+ return PTR_ERR(qspi->base[MSPI]);
} else {
- goto qspi_resource_err;
+ return 0;
}
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "bspi");
if (res) {
qspi->base[BSPI] = devm_ioremap_resource(dev, res);
- if (IS_ERR(qspi->base[BSPI])) {
- ret = PTR_ERR(qspi->base[BSPI]);
- goto qspi_resource_err;
- }
+ if (IS_ERR(qspi->base[BSPI]))
+ return PTR_ERR(qspi->base[BSPI]);
qspi->bspi_mode = true;
} else {
qspi->bspi_mode = false;
@@ -1392,18 +1388,14 @@ int bcm_qspi_probe(struct platform_device *pdev,
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cs_reg");
if (res) {
qspi->base[CHIP_SELECT] = devm_ioremap_resource(dev, res);
- if (IS_ERR(qspi->base[CHIP_SELECT])) {
- ret = PTR_ERR(qspi->base[CHIP_SELECT]);
- goto qspi_resource_err;
- }
+ if (IS_ERR(qspi->base[CHIP_SELECT]))
+ return PTR_ERR(qspi->base[CHIP_SELECT]);
}
qspi->dev_ids = kcalloc(num_irqs, sizeof(struct bcm_qspi_dev_id),
GFP_KERNEL);
- if (!qspi->dev_ids) {
- ret = -ENOMEM;
- goto qspi_resource_err;
- }
+ if (!qspi->dev_ids)
+ return -ENOMEM;
for (val = 0; val < num_irqs; val++) {
irq = -1;
@@ -1484,7 +1476,7 @@ int bcm_qspi_probe(struct platform_device *pdev,
qspi->xfer_mode.addrlen = -1;
qspi->xfer_mode.hp = -1;
- ret = devm_spi_register_master(&pdev->dev, master);
+ ret = spi_register_master(master);
if (ret < 0) {
dev_err(dev, "can't register master\n");
goto qspi_reg_err;
@@ -1497,8 +1489,6 @@ qspi_reg_err:
clk_disable_unprepare(qspi->clk);
qspi_probe_err:
kfree(qspi->dev_ids);
-qspi_resource_err:
- spi_master_put(master);
return ret;
}
/* probe function to be called by SoC specific platform driver probe */
@@ -1508,10 +1498,10 @@ int bcm_qspi_remove(struct platform_device *pdev)
{
struct bcm_qspi *qspi = platform_get_drvdata(pdev);
+ spi_unregister_master(qspi->master);
bcm_qspi_hw_uninit(qspi);
clk_disable_unprepare(qspi->clk);
kfree(qspi->dev_ids);
- spi_unregister_master(qspi->master);
return 0;
}
diff --git a/drivers/spi/spi-bcm2835.c b/drivers/spi/spi-bcm2835.c
index 7104cf17b848..197485f2c2b2 100644
--- a/drivers/spi/spi-bcm2835.c
+++ b/drivers/spi/spi-bcm2835.c
@@ -1278,7 +1278,7 @@ static int bcm2835_spi_probe(struct platform_device *pdev)
struct bcm2835_spi *bs;
int err;
- ctlr = spi_alloc_master(&pdev->dev, ALIGN(sizeof(*bs),
+ ctlr = devm_spi_alloc_master(&pdev->dev, ALIGN(sizeof(*bs),
dma_get_cache_alignment()));
if (!ctlr)
return -ENOMEM;
@@ -1299,23 +1299,17 @@ static int bcm2835_spi_probe(struct platform_device *pdev)
bs->ctlr = ctlr;
bs->regs = devm_platform_ioremap_resource(pdev, 0);
- if (IS_ERR(bs->regs)) {
- err = PTR_ERR(bs->regs);
- goto out_controller_put;
- }
+ if (IS_ERR(bs->regs))
+ return PTR_ERR(bs->regs);
bs->clk = devm_clk_get(&pdev->dev, NULL);
- if (IS_ERR(bs->clk)) {
- err = dev_err_probe(&pdev->dev, PTR_ERR(bs->clk),
- "could not get clk\n");
- goto out_controller_put;
- }
+ if (IS_ERR(bs->clk))
+ return dev_err_probe(&pdev->dev, PTR_ERR(bs->clk),
+ "could not get clk\n");
bs->irq = platform_get_irq(pdev, 0);
- if (bs->irq <= 0) {
- err = bs->irq ? bs->irq : -ENODEV;
- goto out_controller_put;
- }
+ if (bs->irq <= 0)
+ return bs->irq ? bs->irq : -ENODEV;
clk_prepare_enable(bs->clk);
@@ -1349,8 +1343,6 @@ out_dma_release:
bcm2835_dma_release(ctlr, bs);
out_clk_disable:
clk_disable_unprepare(bs->clk);
-out_controller_put:
- spi_controller_put(ctlr);
return err;
}
diff --git a/drivers/spi/spi-bcm2835aux.c b/drivers/spi/spi-bcm2835aux.c
index 03b034c15d2b..fd58547110e6 100644
--- a/drivers/spi/spi-bcm2835aux.c
+++ b/drivers/spi/spi-bcm2835aux.c
@@ -494,7 +494,7 @@ static int bcm2835aux_spi_probe(struct platform_device *pdev)
unsigned long clk_hz;
int err;
- master = spi_alloc_master(&pdev->dev, sizeof(*bs));
+ master = devm_spi_alloc_master(&pdev->dev, sizeof(*bs));
if (!master)
return -ENOMEM;
@@ -524,29 +524,24 @@ static int bcm2835aux_spi_probe(struct platform_device *pdev)
/* the main area */
bs->regs = devm_platform_ioremap_resource(pdev, 0);
- if (IS_ERR(bs->regs)) {
- err = PTR_ERR(bs->regs);
- goto out_master_put;
- }
+ if (IS_ERR(bs->regs))
+ return PTR_ERR(bs->regs);
bs->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(bs->clk)) {
- err = PTR_ERR(bs->clk);
dev_err(&pdev->dev, "could not get clk: %d\n", err);
- goto out_master_put;
+ return PTR_ERR(bs->clk);
}
bs->irq = platform_get_irq(pdev, 0);
- if (bs->irq <= 0) {
- err = bs->irq ? bs->irq : -ENODEV;
- goto out_master_put;
- }
+ if (bs->irq <= 0)
+ return bs->irq ? bs->irq : -ENODEV;
/* this also enables the HW block */
err = clk_prepare_enable(bs->clk);
if (err) {
dev_err(&pdev->dev, "could not prepare clock: %d\n", err);
- goto out_master_put;
+ return err;
}
/* just checking if the clock returns a sane value */
@@ -581,8 +576,6 @@ static int bcm2835aux_spi_probe(struct platform_device *pdev)
out_clk_disable:
clk_disable_unprepare(bs->clk);
-out_master_put:
- spi_master_put(master);
return err;
}
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 7566482c052c..05c75f890ace 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -2442,6 +2442,49 @@ struct spi_controller *__spi_alloc_controller(struct device *dev,
}
EXPORT_SYMBOL_GPL(__spi_alloc_controller);
+static void devm_spi_release_controller(struct device *dev, void *ctlr)
+{
+ spi_controller_put(*(struct spi_controller **)ctlr);
+}
+
+/**
+ * __devm_spi_alloc_controller - resource-managed __spi_alloc_controller()
+ * @dev: physical device of SPI controller
+ * @size: how much zeroed driver-private data to allocate
+ * @slave: whether to allocate an SPI master (false) or SPI slave (true)
+ * Context: can sleep
+ *
+ * Allocate an SPI controller and automatically release a reference on it
+ * when @dev is unbound from its driver. Drivers are thus relieved from
+ * having to call spi_controller_put().
+ *
+ * The arguments to this function are identical to __spi_alloc_controller().
+ *
+ * Return: the SPI controller structure on success, else NULL.
+ */
+struct spi_controller *__devm_spi_alloc_controller(struct device *dev,
+ unsigned int size,
+ bool slave)
+{
+ struct spi_controller **ptr, *ctlr;
+
+ ptr = devres_alloc(devm_spi_release_controller, sizeof(*ptr),
+ GFP_KERNEL);
+ if (!ptr)
+ return NULL;
+
+ ctlr = __spi_alloc_controller(dev, size, slave);
+ if (ctlr) {
+ *ptr = ctlr;
+ devres_add(dev, ptr);
+ } else {
+ devres_free(ptr);
+ }
+
+ return ctlr;
+}
+EXPORT_SYMBOL_GPL(__devm_spi_alloc_controller);
+
#ifdef CONFIG_OF
static int of_spi_get_gpio_numbers(struct spi_controller *ctlr)
{
@@ -2778,6 +2821,11 @@ int devm_spi_register_controller(struct device *dev,
}
EXPORT_SYMBOL_GPL(devm_spi_register_controller);
+static int devm_spi_match_controller(struct device *dev, void *res, void *ctlr)
+{
+ return *(struct spi_controller **)res == ctlr;
+}
+
static int __unregister(struct device *dev, void *null)
{
spi_unregister_device(to_spi_device(dev));
@@ -2819,7 +2867,15 @@ void spi_unregister_controller(struct spi_controller *ctlr)
list_del(&ctlr->list);
mutex_unlock(&board_lock);
- device_unregister(&ctlr->dev);
+ device_del(&ctlr->dev);
+
+ /* Release the last reference on the controller if its driver
+ * has not yet been converted to devm_spi_alloc_master/slave().
+ */
+ if (!devres_find(ctlr->dev.parent, devm_spi_release_controller,
+ devm_spi_match_controller, ctlr))
+ put_device(&ctlr->dev);
+
/* free bus id */
mutex_lock(&board_lock);
if (found == ctlr)
generated by cgit v1.2.3 (git 2.39.0) at 2025-03-11 04:25:07 +0300