Re: [RFC PATCH 2/4] phy: rockchip: Add inno_is_valid_phy_mode

[Vinod Koul]

On 02-10-22, 08:45, Michael Trimarchi wrote:
> The function is used to avoid to enable clock on the hardware
> if the mode requested is invalid
> 
> Signed-off-by: Michael Trimarchi <mich...@amarulasolutions.com>
> ---
>  .../phy/rockchip/phy-rockchip-inno-dsidphy.c  | 19 +++++++++++++++++++
>  1 file changed, 19 insertions(+)
> 
> diff --git a/drivers/phy/rockchip/phy-rockchip-inno-dsidphy.c 
> b/drivers/phy/rockchip/phy-rockchip-inno-dsidphy.c
> index 630e01b5c19b..644cf73cfd53 100644
> --- a/drivers/phy/rockchip/phy-rockchip-inno-dsidphy.c
> +++ b/drivers/phy/rockchip/phy-rockchip-inno-dsidphy.c
> @@ -217,6 +217,20 @@ static void phy_update_bits(struct inno_dsidphy *inno,
>       writel(tmp, inno->phy_base + reg);
>  }
>  
> +static int inno_is_valid_phy_mode(struct inno_dsidphy *inno)
> +{
> +     switch (inno->mode) {
> +     case PHY_MODE_MIPI_DPHY:
> +             break;
> +     case PHY_MODE_LVDS:
> +             break;
> +     default:
> +             return -EINVAL;
> +     }
> +
> +     return 0;
> +};
> +
>  static unsigned long inno_dsidphy_pll_calc_rate(struct inno_dsidphy *inno,
>                                               unsigned long rate)
>  {
> @@ -495,6 +509,11 @@ static void inno_dsidphy_lvds_mode_enable(struct 
> inno_dsidphy *inno)
>  static int inno_dsidphy_power_on(struct phy *phy)
>  {
>       struct inno_dsidphy *inno = phy_get_drvdata(phy);
> +     int ret = 0;

this initialization is superfluous

> +
> +     ret = inno_is_valid_phy_mode(inno);
> +     if (ret)
> +             return ret;
>  
>       clk_prepare_enable(inno->pclk_phy);
>       clk_prepare_enable(inno->ref_clk);
> -- 
> 2.34.1

-- 
~Vinod