diff options
| author | Philipp Tomsich <philipp.tomsich@theobroma-systems.com> | 2017-09-12 15:30:56 (GMT) |
|---|---|---|
| committer | Philipp Tomsich <philipp.tomsich@theobroma-systems.com> | 2017-09-18 18:40:37 (GMT) |
| commit | 2f01a2b2149c4c38467eeeddde09ac48d379aed3 (patch) | |
| tree | 1ec2c857e02d1894ac3e98c0af129572c51e4dde /drivers/clk | |
| parent | 8ac884974a46ae2f206b4053ea32814303912b08 (diff) | |
| download | u-boot-2f01a2b2149c4c38467eeeddde09ac48d379aed3.tar.xz | |
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 <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'drivers/clk')
| -rw-r--r-- | drivers/clk/rockchip/clk_rk3399.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/clk/rockchip/clk_rk3399.c b/drivers/clk/rockchip/clk_rk3399.c index 7232806..168c9dd 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) |