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authorArun Kumar K <arun.kk@samsung.com>2012-10-25 05:24:14 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2013-01-06 09:50:38 -0200
commitb27a23be0d1de44ab2cc01495b4f9149f4f762d5 (patch)
tree88513af9f446a028e9e76702c759770cd1cb89e7 /drivers/media/platform/s5p-mfc
parent371a664eea4e2c0d2acc1df082f7e08693506f89 (diff)
downloadlinaro-lsk-b27a23be0d1de44ab2cc01495b4f9149f4f762d5.tar.gz
[media] s5p-mfc: Add device tree support
This patch will add the device tree support for MFC driver. Signed-off-by: Arun Kumar K <arun.kk@samsung.com> Acked-by: Kamil Debski <k.debski@samsung.com> Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/platform/s5p-mfc')
-rw-r--r--drivers/media/platform/s5p-mfc/s5p_mfc.c100
1 files changed, 84 insertions, 16 deletions
diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc.c b/drivers/media/platform/s5p-mfc/s5p_mfc.c
index 3afe879d54d..e2fe64efb75 100644
--- a/drivers/media/platform/s5p-mfc/s5p_mfc.c
+++ b/drivers/media/platform/s5p-mfc/s5p_mfc.c
@@ -21,6 +21,7 @@
#include <linux/videodev2.h>
#include <media/v4l2-event.h>
#include <linux/workqueue.h>
+#include <linux/of.h>
#include <media/videobuf2-core.h>
#include "s5p_mfc_common.h"
#include "s5p_mfc_ctrl.h"
@@ -1027,6 +1028,8 @@ static int match_child(struct device *dev, void *data)
return !strcmp(dev_name(dev), (char *)data);
}
+static void *mfc_get_drv_data(struct platform_device *pdev);
+
/* MFC probe function */
static int s5p_mfc_probe(struct platform_device *pdev)
{
@@ -1034,6 +1037,7 @@ static int s5p_mfc_probe(struct platform_device *pdev)
struct video_device *vfd;
struct resource *res;
int ret;
+ unsigned int mem_info[2];
pr_debug("%s++\n", __func__);
dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
@@ -1050,8 +1054,7 @@ static int s5p_mfc_probe(struct platform_device *pdev)
return -ENODEV;
}
- dev->variant = (struct s5p_mfc_variant *)
- platform_get_device_id(pdev)->driver_data;
+ dev->variant = mfc_get_drv_data(pdev);
ret = s5p_mfc_init_pm(dev);
if (ret < 0) {
@@ -1081,20 +1084,55 @@ static int s5p_mfc_probe(struct platform_device *pdev)
goto err_res;
}
- dev->mem_dev_l = device_find_child(&dev->plat_dev->dev, "s5p-mfc-l",
- match_child);
- if (!dev->mem_dev_l) {
- mfc_err("Mem child (L) device get failed\n");
- ret = -ENODEV;
- goto err_res;
- }
+ if (pdev->dev.of_node) {
+ dev->mem_dev_l = kzalloc(sizeof(struct device), GFP_KERNEL);
+ if (!dev->mem_dev_l) {
+ mfc_err("Not enough memory\n");
+ ret = -ENOMEM;
+ goto err_res;
+ }
+ of_property_read_u32_array(pdev->dev.of_node, "samsung,mfc-l",
+ mem_info, 2);
+ if (dma_declare_coherent_memory(dev->mem_dev_l, mem_info[0],
+ mem_info[0], mem_info[1],
+ DMA_MEMORY_MAP | DMA_MEMORY_EXCLUSIVE) == 0) {
+ mfc_err("Failed to declare coherent memory for\n"
+ "MFC device\n");
+ ret = -ENOMEM;
+ goto err_res;
+ }
- dev->mem_dev_r = device_find_child(&dev->plat_dev->dev, "s5p-mfc-r",
- match_child);
- if (!dev->mem_dev_r) {
- mfc_err("Mem child (R) device get failed\n");
- ret = -ENODEV;
- goto err_res;
+ dev->mem_dev_r = kzalloc(sizeof(struct device), GFP_KERNEL);
+ if (!dev->mem_dev_r) {
+ mfc_err("Not enough memory\n");
+ ret = -ENOMEM;
+ goto err_res;
+ }
+ of_property_read_u32_array(pdev->dev.of_node, "samsung,mfc-r",
+ mem_info, 2);
+ if (dma_declare_coherent_memory(dev->mem_dev_r, mem_info[0],
+ mem_info[0], mem_info[1],
+ DMA_MEMORY_MAP | DMA_MEMORY_EXCLUSIVE) == 0) {
+ pr_err("Failed to declare coherent memory for\n"
+ "MFC device\n");
+ ret = -ENOMEM;
+ goto err_res;
+ }
+ } else {
+ dev->mem_dev_l = device_find_child(&dev->plat_dev->dev,
+ "s5p-mfc-l", match_child);
+ if (!dev->mem_dev_l) {
+ mfc_err("Mem child (L) device get failed\n");
+ ret = -ENODEV;
+ goto err_res;
+ }
+ dev->mem_dev_r = device_find_child(&dev->plat_dev->dev,
+ "s5p-mfc-r", match_child);
+ if (!dev->mem_dev_r) {
+ mfc_err("Mem child (R) device get failed\n");
+ ret = -ENODEV;
+ goto err_res;
+ }
}
dev->alloc_ctx[0] = vb2_dma_contig_init_ctx(dev->mem_dev_l);
@@ -1366,6 +1404,35 @@ static struct platform_device_id mfc_driver_ids[] = {
};
MODULE_DEVICE_TABLE(platform, mfc_driver_ids);
+static const struct of_device_id exynos_mfc_match[] = {
+ {
+ .compatible = "samsung,mfc-v5",
+ .data = &mfc_drvdata_v5,
+ }, {
+ .compatible = "samsung,mfc-v6",
+ .data = &mfc_drvdata_v6,
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, exynos_mfc_match);
+
+static void *mfc_get_drv_data(struct platform_device *pdev)
+{
+ struct s5p_mfc_variant *driver_data = NULL;
+
+ if (pdev->dev.of_node) {
+ const struct of_device_id *match;
+ match = of_match_node(of_match_ptr(exynos_mfc_match),
+ pdev->dev.of_node);
+ if (match)
+ driver_data = (struct s5p_mfc_variant *)match->data;
+ } else {
+ driver_data = (struct s5p_mfc_variant *)
+ platform_get_device_id(pdev)->driver_data;
+ }
+ return driver_data;
+}
+
static struct platform_driver s5p_mfc_driver = {
.probe = s5p_mfc_probe,
.remove = __devexit_p(s5p_mfc_remove),
@@ -1373,7 +1440,8 @@ static struct platform_driver s5p_mfc_driver = {
.driver = {
.name = S5P_MFC_NAME,
.owner = THIS_MODULE,
- .pm = &s5p_mfc_pm_ops
+ .pm = &s5p_mfc_pm_ops,
+ .of_match_table = exynos_mfc_match,
},
};