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.tomsich@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)