The generic ehci-driver (ehci-generic.c) will try to enable the clocks
listed in the DTSI. If this fails (e.g. due to clk_enable not being
implemented in a driver and -ENOSYS being returned by the clk-uclass),
the driver will bail our and print an error message.
This implements a minimal clk_enable for the RK3399 and supports the
clocks mandatory for the EHCI controllers; as these are enabled by
default we simply return success.
Signed-off-by: Philipp Tomsich <philipp.toms...@theobroma-systems.com>
---
drivers/clk/rockchip/clk_rk3399.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/drivers/clk/rockchip/clk_rk3399.c
b/drivers/clk/rockchip/clk_rk3399.c
index 04f0b3f..a2a1607 100644
--- a/drivers/clk/rockchip/clk_rk3399.c
+++ b/drivers/clk/rockchip/clk_rk3399.c
@@ -950,9 +950,24 @@ static ulong rk3399_clk_set_rate(struct clk *clk, ulong
rate)
return ret;
}
+static int rk3399_clk_enable(struct clk *clk)
+{
+ switch (clk->id) {
+ case HCLK_HOST0:
+ case HCLK_HOST0_ARB:
+ case HCLK_HOST1:
+ case HCLK_HOST1_ARB:
+ return 0;
+ }
+
+ debug("%s: unsupported clk %ld\n", __func__, clk->id);
+ return -ENOENT;
+}
+
static struct clk_ops rk3399_clk_ops = {
.get_rate = rk3399_clk_get_rate,
.set_rate = rk3399_clk_set_rate,
+ .enable = rk3399_clk_enable,
};
static int rk3399_clk_probe(struct udevice *dev)
--
2.1.4
_______________________________________________
U-Boot mailing list
U-Boot@lists.denx.de
https://lists.denx.de/listinfo/u-boot
