[PATCH v4 02/10] s5p-fimc: Add device tree support for FIMC devices
Sylwester Nawrocki
s.nawrocki at samsung.com
Fri Feb 1 14:09:23 EST 2013
This patch adds support for FIMC devices instantiated from devicetree
for S5PV210 and Exynos4 SoCs. The FIMC IP features include colorspace
conversion and scaling (mem-to-mem) and parallel/MIPI CSI2 bus video
capture interface.
Multiple SoC revisions specific parameters are defined statically in
the driver and are used for both dt and non-dt. The driver's static
data is selected based on the compatible property. Previously the
platform device name was used to match driver data and a specific
SoC/IP version.
Aliases are used to determine an index of the IP which is essential
for linking FIMC IP with other entities, like MIPI-CSIS (the MIPI
CSI-2 bus frontend) or FIMC-LITE and FIMC-IS ISP.
Signed-off-by: Sylwester Nawrocki <s.nawrocki at samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park at samsung.com>
---
Changes since v3:
- added optional clock-frequency property to specify local bus
(FIMCn_LCLK) clock frequency
---
.../devicetree/bindings/media/soc/samsung-fimc.txt | 72 +++++++++++++++
drivers/media/platform/s5p-fimc/fimc-capture.c | 2 +-
drivers/media/platform/s5p-fimc/fimc-core.c | 93 +++++++++++++-------
3 files changed, 135 insertions(+), 32 deletions(-)
create mode 100644 Documentation/devicetree/bindings/media/soc/samsung-fimc.txt
diff --git a/Documentation/devicetree/bindings/media/soc/samsung-fimc.txt b/Documentation/devicetree/bindings/media/soc/samsung-fimc.txt
new file mode 100644
index 0000000..916b2c3
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/soc/samsung-fimc.txt
@@ -0,0 +1,72 @@
+Samsung S5P/EXYNOS SoC Camera Subsystem (FIMC)
+----------------------------------------------
+
+The Exynos Camera subsystem comprises of multiple sub-devices that are
+represented by separate platform devices. Some of the IPs come in different
+variants across the SoC revisions (FIMC) and some remain mostly unchanged
+(MIPI CSIS, FIMC-LITE).
+
+All those sub-subdevices are defined as parent nodes of the common device
+node, which also includes common properties of the whole subsystem not really
+specific to any single sub-device, like common camera port pins or external
+clocks for image sensors attached to the SoC.
+
+Common 'camera' node
+--------------------
+
+Required properties:
+
+- compatible : must be "samsung,fimc", "simple-bus"
+
+The 'camera' node must include at least one 'fimc' child node.
+
+
+'fimc' device nodes
+-------------------
+
+Required properties:
+
+- compatible : "samsung,s5pv210-fimc" for S5PV210,
+ "samsung,exynos4210-fimc" for Exynos4210,
+ "samsung,exynos4212-fimc" for Exynos4212/4412 SoCs;
+- reg : physical base address and size of the device memory mapped
+ registers;
+- interrupts : FIMC interrupt to the CPU should be described here;
+
+For every fimc node a numbered alias should be present in the aliases node.
+Aliases are of the form fimc<n>, where <n> is an integer (0...N) specifying
+the IP's instance index.
+
+Optional properties
+
+ - clock-frequency - maximum FIMC local clock (LCLK) frequency
+
+Example:
+
+ aliases {
+ csis0 = &csis_0;
+ fimc0 = &fimc_0;
+ };
+
+ camera {
+ compatible = "samsung,fimc", "simple-bus";
+ #address-cells = <1>;
+ #size-cells = <1>;
+ status = "okay";
+
+ fimc_0: fimc at 11800000 {
+ compatible = "samsung,exynos4210-fimc";
+ reg = <0x11800000 0x1000>;
+ interrupts = <0 85 0>;
+ status = "okay";
+ };
+
+ csis_0: csis at 11880000 {
+ compatible = "samsung,exynos4210-csis";
+ reg = <0x11880000 0x1000>;
+ interrupts = <0 78 0>;
+ max-data-lanes = <4>;
+ };
+ };
+
+[1] Documentation/devicetree/bindings/media/soc/samsung-mipi-csis.txt
diff --git a/drivers/media/platform/s5p-fimc/fimc-capture.c b/drivers/media/platform/s5p-fimc/fimc-capture.c
index f822b8e..bc84301 100644
--- a/drivers/media/platform/s5p-fimc/fimc-capture.c
+++ b/drivers/media/platform/s5p-fimc/fimc-capture.c
@@ -1883,7 +1883,7 @@ int fimc_initialize_capture_subdev(struct fimc_dev *fimc)
v4l2_subdev_init(sd, &fimc_subdev_ops);
sd->flags = V4L2_SUBDEV_FL_HAS_DEVNODE;
- snprintf(sd->name, sizeof(sd->name), "FIMC.%d", fimc->pdev->id);
+ snprintf(sd->name, sizeof(sd->name), "FIMC.%d", fimc->id);
fimc->vid_cap.sd_pads[FIMC_SD_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
fimc->vid_cap.sd_pads[FIMC_SD_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE;
diff --git a/drivers/media/platform/s5p-fimc/fimc-core.c b/drivers/media/platform/s5p-fimc/fimc-core.c
index 29f7bb7..07ca0e0 100644
--- a/drivers/media/platform/s5p-fimc/fimc-core.c
+++ b/drivers/media/platform/s5p-fimc/fimc-core.c
@@ -21,6 +21,8 @@
#include <linux/pm_runtime.h>
#include <linux/list.h>
#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
#include <linux/slab.h>
#include <linux/clk.h>
#include <media/v4l2-ioctl.h>
@@ -863,45 +865,57 @@ static int fimc_m2m_resume(struct fimc_dev *fimc)
return 0;
}
+static const struct of_device_id fimc_of_match[];
+
static int fimc_probe(struct platform_device *pdev)
{
- const struct fimc_drvdata *drv_data = fimc_get_drvdata(pdev);
- struct s5p_platform_fimc *pdata;
+ struct fimc_drvdata *drv_data = NULL;
+ struct device *dev = &pdev->dev;
+ const struct of_device_id *of_id;
+ u32 lclk_freq = 0;
struct fimc_dev *fimc;
struct resource *res;
int ret = 0;
- if (pdev->id >= drv_data->num_entities) {
- dev_err(&pdev->dev, "Invalid platform device id: %d\n",
- pdev->id);
- return -EINVAL;
- }
-
- fimc = devm_kzalloc(&pdev->dev, sizeof(*fimc), GFP_KERNEL);
+ fimc = devm_kzalloc(dev, sizeof(*fimc), GFP_KERNEL);
if (!fimc)
return -ENOMEM;
- fimc->id = pdev->id;
+ if (dev->of_node) {
+ of_id = of_match_node(fimc_of_match, dev->of_node);
+ if (of_id)
+ drv_data = (struct fimc_drvdata *)of_id->data;
+ fimc->id = of_alias_get_id(dev->of_node, "fimc");
+
+ of_property_read_u32(dev->of_node, "clock-frequency",
+ &lclk_freq);
+ } else {
+ drv_data = fimc_get_drvdata(pdev);
+ fimc->id = pdev->id;
+ }
+
+ if (!drv_data || fimc->id < 0 || fimc->id >= drv_data->num_entities) {
+ dev_err(dev, "Invalid driver data or device index (%d)\n",
+ fimc->id);
+ return -EINVAL;
+ }
fimc->variant = drv_data->variant[fimc->id];
fimc->pdev = pdev;
- pdata = pdev->dev.platform_data;
- fimc->pdata = pdata;
-
init_waitqueue_head(&fimc->irq_queue);
spin_lock_init(&fimc->slock);
mutex_init(&fimc->lock);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- fimc->regs = devm_request_and_ioremap(&pdev->dev, res);
+ fimc->regs = devm_request_and_ioremap(dev, res);
if (fimc->regs == NULL) {
- dev_err(&pdev->dev, "Failed to obtain io memory\n");
+ dev_err(dev, "Failed to obtain io memory\n");
return -ENOENT;
}
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;
}
@@ -909,7 +923,10 @@ static int fimc_probe(struct platform_device *pdev)
if (ret)
return ret;
- ret = clk_set_rate(fimc->clock[CLK_BUS], drv_data->lclk_frequency);
+ if (lclk_freq == 0)
+ lclk_freq = drv_data->lclk_frequency;
+
+ ret = clk_set_rate(fimc->clock[CLK_BUS], lclk_freq);
if (ret < 0)
return ret;
@@ -917,10 +934,10 @@ static int fimc_probe(struct platform_device *pdev)
if (ret < 0)
return ret;
- ret = devm_request_irq(&pdev->dev, res->start, fimc_irq_handler,
- 0, dev_name(&pdev->dev), fimc);
+ ret = devm_request_irq(dev, res->start, fimc_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;
}
@@ -929,27 +946,26 @@ static int fimc_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;
/* Initialize contiguous memory allocator */
- 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;
}
- dev_dbg(&pdev->dev, "FIMC.%d registered successfully\n", fimc->id);
+ dev_dbg(dev, "FIMC.%d registered successfully\n", fimc->id);
- pm_runtime_put(&pdev->dev);
+ pm_runtime_put(dev);
return 0;
err_pm:
- pm_runtime_put(&pdev->dev);
+ pm_runtime_put(dev);
err_sd:
fimc_unregister_capture_subdev(fimc);
err_clk:
- clk_disable(fimc->clock[CLK_BUS]);
fimc_clk_put(fimc);
return ret;
}
@@ -1258,10 +1274,24 @@ static const struct platform_device_id fimc_driver_ids[] = {
.name = "exynos4x12-fimc",
.driver_data = (unsigned long)&fimc_drvdata_exynos4x12,
},
- {},
+ { },
};
MODULE_DEVICE_TABLE(platform, fimc_driver_ids);
+static const struct of_device_id fimc_of_match[] = {
+ {
+ .compatible = "samsung,s5pv210-fimc",
+ .data = &fimc_drvdata_s5pv210,
+ }, {
+ .compatible = "samsung,exynos4210-fimc",
+ .data = &fimc_drvdata_exynos4210,
+ }, {
+ .compatible = "samsung,exynos4212-fimc",
+ .data = &fimc_drvdata_exynos4x12,
+ },
+ { /* sentinel */ },
+};
+
static const struct dev_pm_ops fimc_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(fimc_suspend, fimc_resume)
SET_RUNTIME_PM_OPS(fimc_runtime_suspend, fimc_runtime_resume, NULL)
@@ -1272,9 +1302,10 @@ static struct platform_driver fimc_driver = {
.remove = fimc_remove,
.id_table = fimc_driver_ids,
.driver = {
- .name = FIMC_MODULE_NAME,
- .owner = THIS_MODULE,
- .pm = &fimc_pm_ops,
+ .of_match_table = fimc_of_match,
+ .name = FIMC_MODULE_NAME,
+ .owner = THIS_MODULE,
+ .pm = &fimc_pm_ops,
}
};
--
1.7.9.5
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