The clock framework makes it simple to deal with an optional clock.
You can call clk_get_optional() and if the clock isn't specified it'll
just return NULL without complaint. It's valid to pass NULL to
enable/disable/prepare/unprepare. Let's make use of this to simplify
things a tiny bit.

Signed-off-by: Douglas Anderson <diand...@chromium.org>
Reviewed-by: Robert Foss <robert.f...@linaro.org>
Reviewed-by: Bjorn Andersson <bjorn.anders...@linaro.org>
Reviewed-by: Stephen Boyd <swb...@chromium.org>
Reviewed-by: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
Reviewed-by: Andrzej Hajda <a.ha...@samsung.com>
---

(no changes since v2)

Changes in v2:
- Removed 2nd paragraph in commit message.

 drivers/gpu/drm/bridge/ti-sn65dsi86.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c 
b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
index 88df4dd0f39d..96fe8f2c0ea9 100644
--- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c
+++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
@@ -1275,14 +1275,9 @@ static int ti_sn_bridge_probe(struct i2c_client *client,
                return ret;
        }
 
-       pdata->refclk = devm_clk_get(pdata->dev, "refclk");
-       if (IS_ERR(pdata->refclk)) {
-               ret = PTR_ERR(pdata->refclk);
-               if (ret == -EPROBE_DEFER)
-                       return ret;
-               DRM_DEBUG_KMS("refclk not found\n");
-               pdata->refclk = NULL;
-       }
+       pdata->refclk = devm_clk_get_optional(pdata->dev, "refclk");
+       if (IS_ERR(pdata->refclk))
+               return PTR_ERR(pdata->refclk);
 
        ret = ti_sn_bridge_parse_dsi_host(pdata);
        if (ret)
-- 
2.31.1.368.gbe11c130af-goog

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