Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1521962

Re: [PATCH v2 1/2] phy: rockchip-inno-usb2: correct clk_ops callback

Show all headers | View raw

William

On Sun, Nov 13, 2016 at 11:01 PM, William Wu <wulf@rock-chips.com> wrote:
> Since we needs to delay ~1ms to wait for 480MHz output clock
> of USB2 PHY to become stable after turn on it, the delay time
> is pretty long for something that's supposed to be "atomic"
> like a clk_enable(). Consider that clk_enable() will disable
> interrupt and that a 1ms interrupt latency is not sensible.
>
> The 480MHz output clock should be handled in prepare callbacks
> which support gate a clk if the operation may sleep.
>
> Signed-off-by: William Wu <wulf@rock-chips.com>
> ---
>  drivers/phy/phy-rockchip-inno-usb2.c | 12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)

Reviewed-by: Douglas Anderson <dianders@chromium.org>

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[PATCH v2 1/2] phy: rockchip-inno-usb2: correct clk_ops callback William Wu <wulf@rock-chips.com> - 2016-11-14 08:10 +0100
  Re: [PATCH v2 1/2] phy: rockchip-inno-usb2: correct clk_ops callback Doug Anderson <dianders@google.com> - 2016-11-14 19:20 +0100
    Re: [PATCH v2 1/2] phy: rockchip-inno-usb2: correct clk_ops callback wlf <wulf@rock-chips.com> - 2016-11-15 04:30 +0100

csiph-web