[PATCH] video: mxsfb: fix clk_get_by_name() return value check

[Giulio Benetti]

If clk_get_by_name() returns 0 it means it executed successfully while now
we consider it as an error. So let's check if return value is negative to
be an error. Otherwise this prevents "axi" and "disp_axi" to be enabled.

Signed-off-by: Giulio Benetti <giulio.bene...@benettiengineering.com>
---
 drivers/video/mxsfb.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/video/mxsfb.c b/drivers/video/mxsfb.c
index 98d2965711..5f85c0c3eb 100644
--- a/drivers/video/mxsfb.c
+++ b/drivers/video/mxsfb.c
@@ -89,7 +89,7 @@ static void mxs_lcd_init(struct udevice *dev, u32 fb_addr,
        }
 
        ret = clk_get_by_name(dev, "axi", &clk);
-       if (!ret) {
+       if (ret < 0) {
                debug("%s: Failed to get mxs axi clk: %d\n", __func__, ret);
        } else {
                ret = clk_enable(&clk);
@@ -100,7 +100,7 @@ static void mxs_lcd_init(struct udevice *dev, u32 fb_addr,
        }
 
        ret = clk_get_by_name(dev, "disp_axi", &clk);
-       if (!ret) {
+       if (ret < 0) {
                debug("%s: Failed to get mxs disp_axi clk: %d\n", __func__, 
ret);
        } else {
                ret = clk_enable(&clk);
-- 
2.25.1