[U-Boot] [PATCH v2 1/4] rockchip: clk: rk3399: handle clk_enable requests for USB3

[Mark Kettenis]

The "simple" OF glue layer for the Designware USB3 core enables
all refernced clocks.  These need to be need to be implemented
otherwise the driver fails to probe.  A dummy implementation
that simply returns success is sufficient since the RK3399 comes
out of reset with all clock gates open.

Signed-off-by: Mark Kettenis <kettenis at openbsd.org>
---
 drivers/clk/rockchip/clk_rk3399.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/clk/rockchip/clk_rk3399.c b/drivers/clk/rockchip/clk_rk3399.c
index 79007b8682..d9950c159b 100644
--- a/drivers/clk/rockchip/clk_rk3399.c
+++ b/drivers/clk/rockchip/clk_rk3399.c
@@ -1080,6 +1080,18 @@ static int rk3399_clk_enable(struct clk *clk)
 	case PCLK_GMAC:
 		/* Required to successfully probe the Designware GMAC driver */
 		return 0;
+
+	case SCLK_USB3OTG0_REF:
+	case SCLK_USB3OTG1_REF:
+	case SCLK_USB3OTG0_SUSPEND:
+	case SCLK_USB3OTG1_SUSPEND:
+	case ACLK_USB3OTG0:
+	case ACLK_USB3OTG1:
+	case ACLK_USB3_RKSOC_AXI_PERF:
+	case ACLK_USB3:
+	case ACLK_USB3_GRF:
+		/* Required to successfully probe the Designware USB3 driver */
+		return 0;
 	}
 
 	debug("%s: unsupported clk %ld\n", __func__, clk->id);
-- 
2.21.0