[media] omap3isp: DT support for clocks

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

1 files changed, 25 insertions, 0 deletions

diff --git a/drivers/media/platform/omap3isp/isp.c b/drivers/media/platform/omap3isp/isp.c
index f694615f32c4..82499cd7c3d7 100644
--- a/drivers/media/platform/omap3isp/isp.c
+++ b/drivers/media/platform/omap3isp/isp.c
@@ -279,9 +279,21 @@ static const struct clk_init_data isp_xclk_init_data = {
         .num_parents = 1,
 };
 
+static struct clk *isp_xclk_src_get(struct of_phandle_args *clkspec, void *data)
+{
+        unsigned int idx = clkspec->args[0];
+        struct isp_device *isp = data;
+
+        if (idx >= ARRAY_SIZE(isp->xclks))
+                return ERR_PTR(-ENOENT);
+
+        return isp->xclks[idx].clk;
+}
+
 static int isp_xclk_init(struct isp_device *isp)
 {
         struct isp_platform_data *pdata = isp->pdata;
+        struct device_node *np = isp->dev->of_node;
         struct clk_init_data init;
         unsigned int i;
 
@@ -312,6 +324,12 @@ static int isp_xclk_init(struct isp_device *isp)
                 if (IS_ERR(xclk->clk))
                         return PTR_ERR(xclk->clk);
 
+                /* When instantiated from DT we don't need to register clock
+                 * aliases.
+                 */
+                if (np)
+                        continue;
+
                 if (pdata->xclks[i].con_id == NULL &&
                     pdata->xclks[i].dev_id == NULL)
                         continue;
@@ -327,13 +345,20 @@ static int isp_xclk_init(struct isp_device *isp)
                 clkdev_add(xclk->lookup);
         }
 
+        if (np)
+                of_clk_add_provider(np, isp_xclk_src_get, isp);
+
         return 0;
 }
 
 static void isp_xclk_cleanup(struct isp_device *isp)
 {
+        struct device_node *np = isp->dev->of_node;
         unsigned int i;
 
+        if (np)
+                of_clk_del_provider(np);
+
         for (i = 0; i < ARRAY_SIZE(isp->xclks); ++i) {
                 struct isp_xclk *xclk = &isp->xclks[i];