[Uboot-stm32] [U-BOOT internal][PATCH 2/3] usb: host: dwc2: add support for reset and clk

[Patrice CHOTARD]

On 7/30/19 4:28 PM, Patrick Delaunay wrote:
> Add support for clock and reset with driver model.
>
> Signed-off-by: Patrick Delaunay <patrick.delaunay at st.com>
> ---
>
>  drivers/usb/host/dwc2.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++++-
>  1 file changed, 53 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/usb/host/dwc2.c b/drivers/usb/host/dwc2.c
> index a06efad..06db8da 100644
> --- a/drivers/usb/host/dwc2.c
> +++ b/drivers/usb/host/dwc2.c
> @@ -5,13 +5,15 @@
>   */
>  
>  #include <common.h>
> +#include <clk.h>
>  #include <dm.h>
>  #include <errno.h>
>  #include <generic-phy.h>
> -#include <usb.h>
>  #include <malloc.h>
>  #include <memalign.h>
>  #include <phys2bus.h>
> +#include <reset.h>
> +#include <usb.h>
>  #include <usbroothubdes.h>
>  #include <wait_bit.h>
>  #include <asm/io.h>
> @@ -1370,6 +1372,48 @@ static int dwc2_shutdown_phy(struct udevice *dev)
>  	return 0;
>  }
>  
> +static int dwc2_reset_init(struct udevice *dev)
> +{
> +	struct reset_ctl_bulk	resets;
> +	int ret;
> +
> +	ret = reset_get_bulk(dev, &resets);
> +	if (ret == -ENOTSUPP || ret == -ENOENT)
> +		return 0;
> +	else if (ret)
> +		return ret;
> +
> +	reset_assert_bulk(&resets);
> +	udelay(2);
> +	ret = reset_deassert_bulk(&resets);
> +	if (ret) {
> +		reset_release_bulk(&resets);
> +		return ret;
> +	}
> +
> +	return 0;
> +}
> +
> +static int dwc2_clk_init(struct udevice *dev)
> +{
> +	struct clk_bulk		clks;
> +	int ret;
> +
> +	ret = clk_get_bulk(dev, &clks);
> +	if (ret == -ENOSYS || ret == -ENOENT)
> +		return 0;
> +	if (ret)
> +		return ret;
> +
> +	ret = clk_enable_bulk(&clks);
> +	if (ret) {
> +		clk_release_bulk(&clks);
> +		return ret;
> +	}
> +
> +	return 0;
> +}
> +
>  static int dwc2_usb_probe(struct udevice *dev)
>  {
>  	struct dwc2_priv *priv = dev_get_priv(dev);
> @@ -1378,6 +1422,14 @@ static int dwc2_usb_probe(struct udevice *dev)
>  
>  	bus_priv->desc_before_addr = true;
>  
> +	ret = dwc2_reset_init(dev);


in dwc2_init_common(), reset are already manged by dwc2_reset()

> +	if (ret)
> +		return ret;
> +
> +	ret = dwc2_clk_init(dev);
> +	if (ret)
> +		return ret;
> +
>  	ret = dwc2_setup_phy(dev);
>  	if (ret)
>  		return ret;