drm/exynos/dsi: use of_graph_get_endpoint_by_regs helper

This allows to remove the local of_graph_get_port_by_reg(),
of_graph_get_endpoint_by_reg(), and of_get_child_by_name_reg()
functions.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
Reviewed-by: Inki Dae <inki.dae@samsung.com>

diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
index 72c3565..601ecf8 100644 (file)
--- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
@@ -1632,50 +1632,6 @@ static const struct drm_encoder_funcs exynos_dsi_encoder_funcs = {
 
 MODULE_DEVICE_TABLE(of, exynos_dsi_of_match);
 
-/* of_* functions will be removed after merge of of_graph patches */
-static struct device_node *
-of_get_child_by_name_reg(struct device_node *parent, const char *name, u32 reg)
-{
-       struct device_node *np;
-
-       for_each_child_of_node(parent, np) {
-               u32 r;
-
-               if (!np->name || of_node_cmp(np->name, name))
-                       continue;
-
-               if (of_property_read_u32(np, "reg", &r) < 0)
-                       r = 0;
-
-               if (reg == r)
-                       break;
-       }
-
-       return np;
-}
-
-static struct device_node *of_graph_get_port_by_reg(struct device_node *parent,
-                                                   u32 reg)
-{
-       struct device_node *ports, *port;
-
-       ports = of_get_child_by_name(parent, "ports");
-       if (ports)
-               parent = ports;
-
-       port = of_get_child_by_name_reg(parent, "port", reg);
-
-       of_node_put(ports);
-
-       return port;
-}
-
-static struct device_node *
-of_graph_get_endpoint_by_reg(struct device_node *port, u32 reg)
-{
-       return of_get_child_by_name_reg(port, "endpoint", reg);
-}
-
 static int exynos_dsi_of_read_u32(const struct device_node *np,
                                  const char *propname, u32 *out_value)
 {
@@ -1697,7 +1653,7 @@ static int exynos_dsi_parse_dt(struct exynos_dsi *dsi)
 {
        struct device *dev = dsi->dev;
        struct device_node *node = dev->of_node;
-       struct device_node *port, *ep;
+       struct device_node *ep;
        int ret;
 
        ret = exynos_dsi_of_read_u32(node, "samsung,pll-clock-frequency",
@@ -1705,16 +1661,9 @@ static int exynos_dsi_parse_dt(struct exynos_dsi *dsi)
        if (ret < 0)
                return ret;
 
-       port = of_graph_get_port_by_reg(node, DSI_PORT_OUT);
-       if (!port) {
-               dev_err(dev, "no output port specified\n");
-               return -EINVAL;
-       }
-
-       ep = of_graph_get_endpoint_by_reg(port, 0);
-       of_node_put(port);
+       ep = of_graph_get_endpoint_by_regs(node, DSI_PORT_OUT, 0);
        if (!ep) {
-               dev_err(dev, "no endpoint specified in output port\n");
+               dev_err(dev, "no output port with endpoint specified\n");
                return -EINVAL;
        }