From: Philipp Tomsich Date: Tue, 12 Sep 2017 15:30:56 +0000 (+0200) Subject: rockchip: clk: rk3399: add clk_enable function and support USB HOST0/1 X-Git-Tag: v2017.11-rc1~87^2~10 X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=2f01a2b2149c4c38467eeeddde09ac48d379aed3;p=oweals%2Fu-boot.git rockchip: clk: rk3399: add clk_enable function and support USB HOST0/1 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 Reviewed-by: Simon Glass --- diff --git a/drivers/clk/rockchip/clk_rk3399.c b/drivers/clk/rockchip/clk_rk3399.c index 7232806724..168c9ddba3 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)