Hi,
On Sunday 21 August 2016 02:02 AM, Randy Li wrote:
> It is a hardware bug in RK3288, the only way to solve it is to
> reset the phy.
>
> Signed-off-by: Randy Li <ayaka@xxxxxxxxxxx>
> ---
> drivers/phy/phy-rockchip-usb.c | 20 ++++++++++++++++++++
> 1 file changed, 20 insertions(+)
>
> diff --git a/drivers/phy/phy-rockchip-usb.c b/drivers/phy/phy-rockchip-usb.c
> index 2a7381f..734987f 100644
> --- a/drivers/phy/phy-rockchip-usb.c
> +++ b/drivers/phy/phy-rockchip-usb.c
> @@ -29,6 +29,7 @@
> #include <linux/reset.h>
> #include <linux/regmap.h>
> #include <linux/mfd/syscon.h>
> +#include <linux/delay.h>
>
> static int enable_usb_uart;
>
> @@ -64,6 +65,7 @@ struct rockchip_usb_phy {
> struct clk_hw clk480m_hw;
> struct phy *phy;
> bool uart_enabled;
> + struct reset_control *reset;
> };
>
> static int rockchip_usb_phy_power(struct rockchip_usb_phy *phy,
> @@ -144,9 +146,23 @@ static int rockchip_usb_phy_power_on(struct phy *_phy)
> return clk_prepare_enable(phy->clk480m);
> }
>
> +static int rockchip_usb_phy_reset(struct phy *_phy)
> +{
> + struct rockchip_usb_phy *phy = phy_get_drvdata(_phy);
> +
> + if (phy->reset) {
> + reset_control_assert(phy->reset);
> + udelay(10);
> + reset_control_deassert(phy->reset);
> + }
> +
> + return 0;
> +}
> +
> static const struct phy_ops ops = {
> .power_on = rockchip_usb_phy_power_on,
> .power_off = rockchip_usb_phy_power_off,
> + .reset = rockchip_usb_phy_reset,
why not just reuse the .init ops? reset can be done during initialization right?
Thanks
Kishon
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