[U-Boot] [PATCH 3/3] net: ravb: Add clock handling support

[Nobuhiro Iwamatsu]

Applied to rmobile branch, thanks!

2017-07-22 6:20 GMT+09:00 Marek Vasut <marek.vasut at gmail.com>:
> Add support for enabling and disabling the clock using the clock
> framework based on the content of OF instead of doing it manually
> in the board file.
>
> Signed-off-by: Marek Vasut <marek.vasut+renesas at gmail.com>
> Cc: Joe Hershberger <joe.hershberger at ni.com>
> Cc: Nobuhiro Iwamatsu <iwamatsu at nigauri.org>
> ---
>  drivers/net/ravb.c | 21 +++++++++++++++++++--
>  1 file changed, 19 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/net/ravb.c b/drivers/net/ravb.c
> index ce0eacceb6..8db127ba06 100644
> --- a/drivers/net/ravb.c
> +++ b/drivers/net/ravb.c
> @@ -10,6 +10,7 @@
>   */
>
>  #include <common.h>
> +#include <clk.h>
>  #include <dm.h>
>  #include <errno.h>
>  #include <miiphy.h>
> @@ -120,6 +121,7 @@ struct ravb_priv {
>         struct phy_device       *phydev;
>         struct mii_dev          *bus;
>         void __iomem            *iobase;
> +       struct clk              clk;
>  };
>
>  static inline void ravb_flush_dcache(u32 addr, u32 len)
> @@ -432,27 +434,38 @@ int ravb_start(struct udevice *dev)
>         struct ravb_priv *eth = dev_get_priv(dev);
>         int ret;
>
> -       ret = ravb_reset(dev);
> +       ret = clk_enable(&eth->clk);
>         if (ret)
>                 return ret;
>
> +       ret = ravb_reset(dev);
> +       if (ret)
> +               goto err;
> +
>         ravb_base_desc_init(eth);
>         ravb_tx_desc_init(eth);
>         ravb_rx_desc_init(eth);
>
>         ret = ravb_config(dev);
>         if (ret)
> -               return ret;
> +               goto err;
>
>         /* Setting the control will start the AVB-DMAC process. */
>         writel(CCC_OPC_OPERATION, eth->iobase + RAVB_REG_CCC);
>
>         return 0;
> +
> +err:
> +       clk_disable(&eth->clk);
> +       return ret;
>  }
>
>  static void ravb_stop(struct udevice *dev)
>  {
> +       struct ravb_priv *eth = dev_get_priv(dev);
> +
>         ravb_reset(dev);
> +       clk_disable(&eth->clk);
>  }
>
>  static int ravb_probe(struct udevice *dev)
> @@ -466,6 +479,10 @@ static int ravb_probe(struct udevice *dev)
>         iobase = map_physmem(pdata->iobase, 0x1000, MAP_NOCACHE);
>         eth->iobase = iobase;
>
> +       ret = clk_get_by_index(dev, 0, &eth->clk);
> +       if (ret < 0)
> +               goto err_mdio_alloc;
> +
>         mdiodev = mdio_alloc();
>         if (!mdiodev) {
>                 ret = -ENOMEM;
> --
> 2.11.0
>



-- 
Nobuhiro Iwamatsu
   iwamatsu at {nigauri.org / debian.org}
   GPG ID: 40AD1FA6