[PATCH] clk: rockchip: rk3328: Add SCLK_USB3OTG_REF support

[Jonas Karlman]

The SCLK_USB3OTG_REF clocks is used as reference clock for USB3 block.

Add simple support to get rate of SCLK_USB3OTG_REF clocks to fix
reference clock period configuration.

Signed-off-by: Jonas Karlman <jonas at kwiboo.se>
---
This has been runtime tested on a Rock64 and NanoPi R2S Plus.
---
 drivers/clk/rockchip/clk_rk3328.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/clk/rockchip/clk_rk3328.c b/drivers/clk/rockchip/clk_rk3328.c
index 87075ec71340..314b903eaa03 100644
--- a/drivers/clk/rockchip/clk_rk3328.c
+++ b/drivers/clk/rockchip/clk_rk3328.c
@@ -706,6 +706,9 @@ static ulong rk3328_clk_get_rate(struct clk *clk)
 	case PCLK_HDMIPHY:
 		rate = rk3328_hdmiphy_get_clk(priv->cru);
 		break;
+	case SCLK_USB3OTG_REF:
+		rate = OSC_HZ;
+		break;
 	default:
 		return -ENOENT;
 	}
@@ -780,6 +783,7 @@ static ulong rk3328_clk_set_rate(struct clk *clk, ulong rate)
 	case PCLK_DDR:
 	case ACLK_GMAC:
 	case PCLK_GMAC:
+	case SCLK_USB3OTG_REF:
 	case SCLK_USB3OTG_SUSPEND:
 	case USB480M:
 		return 0;
-- 
2.43.2