[PATCH v2 04/22] clk: rockchip: rk3399: Add SCLK_USB3OTGx_REF support

[Jonas Karlman]

The SCLK_USB3OTGx_REF clocks is used as reference clock for USB3 block.

Add simple support to get rate of SCLK_USB3OTGx_REF clocks to fix
reference clock period configuration.

Also replace use of 24000000 with the OSC_HZ constant.

Signed-off-by: Jonas Karlman <jo...@kwiboo.se>
Reviewed-by: Quentin Schulz <quentin.sch...@theobroma-systems.com>
Reviewed-by: Kever Yang <kever.y...@rock-chips.com>
---
v2: Collect r-b tags
---
 drivers/clk/rockchip/clk_rk3399.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/rockchip/clk_rk3399.c 
b/drivers/clk/rockchip/clk_rk3399.c
index 0b3223611a32..67b2c05ec9ed 100644
--- a/drivers/clk/rockchip/clk_rk3399.c
+++ b/drivers/clk/rockchip/clk_rk3399.c
@@ -976,7 +976,9 @@ static ulong rk3399_clk_get_rate(struct clk *clk)
        case SCLK_UART1:
        case SCLK_UART2:
        case SCLK_UART3:
-               return 24000000;
+       case SCLK_USB3OTG0_REF:
+       case SCLK_USB3OTG1_REF:
+               return OSC_HZ;
        case PCLK_HDMI_CTRL:
                break;
        case DCLK_VOP0:
-- 
2.43.2