[PATCH RFC v5 3/6] s5p-fimc: Add device tree support for FIMC-LITE device driver
Sylwester Nawrocki
s.nawrocki at samsung.com
Sat Mar 9 03:46:03 EST 2013
This patch adds the device tree support for FIMC-LITE device
driver. The bindings include compatible property for the Exynos5
SoC series, however the actual implementation for these SoCs will
be added in a separate patch.
Signed-off-by: Sylwester Nawrocki <s.nawrocki at samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park at samsung.com>
---
Changes since v4:
- the bindings documentation moved to a separate file.
---
.../devicetree/bindings/media/exynos-fimc-lite.txt | 13 ++++
drivers/media/platform/s5p-fimc/fimc-lite.c | 63 ++++++++++++++------
2 files changed, 58 insertions(+), 18 deletions(-)
create mode 100644 Documentation/devicetree/bindings/media/exynos-fimc-lite.txt
diff --git a/Documentation/devicetree/bindings/media/exynos-fimc-lite.txt b/Documentation/devicetree/bindings/media/exynos-fimc-lite.txt
new file mode 100644
index 0000000..2e56e82
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/exynos-fimc-lite.txt
@@ -0,0 +1,13 @@
+Exynos4x12/Exynos5 SoC series camera interface (FIMC-LITE)
+
+Required properties:
+
+- compatible : should be "samsung,exynos4212-fimc" for Exynos4212 and
+ Exynos4412 SoCs;
+- reg : physical base address and size of the device memory mapped
+ registers;
+- interrupts : should contain FIMC-LITE interrupt;
+
+For every fimc-lite node a numbered alias should be present in the aliases
+node. Aliases are in form of fimc-lite<n>, where <n> is an integer (0...N)
+specifying the IP's instance index.
diff --git a/drivers/media/platform/s5p-fimc/fimc-lite.c b/drivers/media/platform/s5p-fimc/fimc-lite.c
index 47fbf7b..7aad668 100644
--- a/drivers/media/platform/s5p-fimc/fimc-lite.c
+++ b/drivers/media/platform/s5p-fimc/fimc-lite.c
@@ -17,6 +17,7 @@
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/module.h>
+#include <linux/of.h>
#include <linux/types.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
@@ -1481,18 +1482,34 @@ static int fimc_lite_clk_get(struct fimc_lite *fimc)
return ret;
}
+static const struct of_device_id flite_of_match[];
+
static int fimc_lite_probe(struct platform_device *pdev)
{
- struct flite_drvdata *drv_data = fimc_lite_get_drvdata(pdev);
+ struct flite_drvdata *drv_data = NULL;
+ struct device *dev = &pdev->dev;
+ const struct of_device_id *of_id;
struct fimc_lite *fimc;
struct resource *res;
int ret;
- fimc = devm_kzalloc(&pdev->dev, sizeof(*fimc), GFP_KERNEL);
+ fimc = devm_kzalloc(dev, sizeof(*fimc), GFP_KERNEL);
if (!fimc)
return -ENOMEM;
- fimc->index = pdev->id;
+ if (dev->of_node) {
+ of_id = of_match_node(flite_of_match, dev->of_node);
+ if (of_id)
+ drv_data = (struct flite_drvdata *)of_id->data;
+ fimc->index = of_alias_get_id(dev->of_node, "fimc-lite");
+ } else {
+ drv_data = fimc_lite_get_drvdata(pdev);
+ fimc->index = pdev->id;
+ }
+
+ if (!drv_data || fimc->index < 0 || fimc->index >= FIMC_LITE_MAX_DEVS)
+ return -EINVAL;
+
fimc->variant = drv_data->variant[fimc->index];
fimc->pdev = pdev;
@@ -1501,13 +1518,13 @@ static int fimc_lite_probe(struct platform_device *pdev)
mutex_init(&fimc->lock);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- fimc->regs = devm_ioremap_resource(&pdev->dev, res);
+ fimc->regs = devm_ioremap_resource(dev, res);
if (IS_ERR(fimc->regs))
return PTR_ERR(fimc->regs);
res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (res == NULL) {
- dev_err(&pdev->dev, "Failed to get IRQ resource\n");
+ dev_err(dev, "Failed to get IRQ resource\n");
return -ENXIO;
}
@@ -1515,10 +1532,10 @@ static int fimc_lite_probe(struct platform_device *pdev)
if (ret)
return ret;
- ret = devm_request_irq(&pdev->dev, res->start, flite_irq_handler,
- 0, dev_name(&pdev->dev), fimc);
+ ret = devm_request_irq(dev, res->start, flite_irq_handler,
+ 0, dev_name(dev), fimc);
if (ret) {
- dev_err(&pdev->dev, "Failed to install irq (%d)\n", ret);
+ dev_err(dev, "Failed to install irq (%d)\n", ret);
goto err_clk;
}
@@ -1528,23 +1545,23 @@ static int fimc_lite_probe(struct platform_device *pdev)
goto err_clk;
platform_set_drvdata(pdev, fimc);
- pm_runtime_enable(&pdev->dev);
- ret = pm_runtime_get_sync(&pdev->dev);
+ pm_runtime_enable(dev);
+ ret = pm_runtime_get_sync(dev);
if (ret < 0)
goto err_sd;
- fimc->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
+ fimc->alloc_ctx = vb2_dma_contig_init_ctx(dev);
if (IS_ERR(fimc->alloc_ctx)) {
ret = PTR_ERR(fimc->alloc_ctx);
goto err_pm;
}
- pm_runtime_put(&pdev->dev);
+ pm_runtime_put(dev);
- dev_dbg(&pdev->dev, "FIMC-LITE.%d registered successfully\n",
+ dev_dbg(dev, "FIMC-LITE.%d registered successfully\n",
fimc->index);
return 0;
err_pm:
- pm_runtime_put(&pdev->dev);
+ pm_runtime_put(dev);
err_sd:
fimc_lite_unregister_capture_subdev(fimc);
err_clk:
@@ -1635,6 +1652,12 @@ static int fimc_lite_remove(struct platform_device *pdev)
return 0;
}
+static const struct dev_pm_ops fimc_lite_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(fimc_lite_suspend, fimc_lite_resume)
+ SET_RUNTIME_PM_OPS(fimc_lite_runtime_suspend, fimc_lite_runtime_resume,
+ NULL)
+};
+
static struct flite_variant fimc_lite0_variant_exynos4 = {
.max_width = 8192,
.max_height = 8192,
@@ -1660,17 +1683,21 @@ static struct platform_device_id fimc_lite_driver_ids[] = {
};
MODULE_DEVICE_TABLE(platform, fimc_lite_driver_ids);
-static const struct dev_pm_ops fimc_lite_pm_ops = {
- SET_SYSTEM_SLEEP_PM_OPS(fimc_lite_suspend, fimc_lite_resume)
- SET_RUNTIME_PM_OPS(fimc_lite_runtime_suspend, fimc_lite_runtime_resume,
- NULL)
+static const struct of_device_id flite_of_match[] = {
+ {
+ .compatible = "samsung,exynos4212-fimc-lite",
+ .data = &fimc_lite_drvdata_exynos4,
+ },
+ { /* sentinel */ },
};
+MODULE_DEVICE_TABLE(of, flite_of_match);
static struct platform_driver fimc_lite_driver = {
.probe = fimc_lite_probe,
.remove = fimc_lite_remove,
.id_table = fimc_lite_driver_ids,
.driver = {
+ .of_match_table = flite_of_match,
.name = FIMC_LITE_DRV_NAME,
.owner = THIS_MODULE,
.pm = &fimc_lite_pm_ops,
--
1.7.9.5
More information about the devicetree-discuss
mailing list