summaryrefslogtreecommitdiff
path: root/drivers/dma/ste_dma40.c
diff options
context:
space:
mode:
authorLee Jones <lee.jones@linaro.org>2013-05-03 15:32:11 +0100
committerLinus Walleij <linus.walleij@linaro.org>2013-05-23 21:13:06 +0200
commit1814a1703ce2d6d4b88b5f62a52b137afebad990 (patch)
tree0a035efe9458f9ebef3dc3a01e278540ab75276d /drivers/dma/ste_dma40.c
parentbb75d93b903afcd0904c83850835857fd9f8ef2d (diff)
dmaengine: ste_dma40: Allow driver to be probe()able when DT is enabled
When booting using Device Tree, devices aren't registered in the normal way. Instead, they need to be provided with a compatible string which is held in an OF Match Table for comparison during start-up. Here we provide the compatible string and prepare the driver to not receive a platform data pointer. Acked-by: Vinod Koul <vnod.koul@intel.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Lee Jones <lee.jones@linaro.org> [Fixed up whitespace error] Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/dma/ste_dma40.c')
-rw-r--r--drivers/dma/ste_dma40.c46
1 files changed, 44 insertions, 2 deletions
diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index 925cdbe08c2e..495e8869b9b0 100644
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -17,6 +17,7 @@
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <linux/err.h>
+#include <linux/of.h>
#include <linux/amba/bus.h>
#include <linux/regulator/consumer.h>
#include <linux/platform_data/dma-ste-dma40.h>
@@ -3471,17 +3472,52 @@ failure:
return ret;
}
+static int __init d40_of_probe(struct platform_device *pdev,
+ struct device_node *np)
+{
+ struct stedma40_platform_data *pdata;
+
+ /*
+ * FIXME: Fill in this routine as more support is added.
+ * First platform enabled (u8500) doens't need any extra
+ * properties to run, so this is fairly sparce currently.
+ */
+
+ pdata = devm_kzalloc(&pdev->dev,
+ sizeof(struct stedma40_platform_data),
+ GFP_KERNEL);
+ if (!pdata)
+ return -ENOMEM;
+
+ pdev->dev.platform_data = pdata;
+
+ return 0;
+}
+
static int __init d40_probe(struct platform_device *pdev)
{
+ struct stedma40_platform_data *plat_data = pdev->dev.platform_data;
+ struct device_node *np = pdev->dev.of_node;
int err;
int ret = -ENOENT;
- struct d40_base *base;
+ struct d40_base *base = NULL;
struct resource *res = NULL;
int num_reserved_chans;
u32 val;
- base = d40_hw_detect_init(pdev);
+ if (!plat_data) {
+ if (np) {
+ if(d40_of_probe(pdev, np)) {
+ ret = -ENOMEM;
+ goto failure;
+ }
+ } else {
+ d40_err(&pdev->dev, "No pdata or Device Tree provided\n");
+ goto failure;
+ }
+ }
+ base = d40_hw_detect_init(pdev);
if (!base)
goto failure;
@@ -3655,11 +3691,17 @@ failure:
return ret;
}
+static const struct of_device_id d40_match[] = {
+ { .compatible = "stericsson,dma40", },
+ {}
+};
+
static struct platform_driver d40_driver = {
.driver = {
.owner = THIS_MODULE,
.name = D40_NAME,
.pm = DMA40_PM_OPS,
+ .of_match_table = d40_match,
},
};