On 4/14/2016 2:38 PM, dinguyen@xxxxxxxxxxxxxxxxxxxxx wrote:
> From: Dinh Nguyen <dinguyen@xxxxxxxxxxxxxxxxxxxxx>
>
> Allow for platforms that have a reset controller driver in place to bring
> the USB IP out of reset.
>
> Signed-off-by: Dinh Nguyen <dinguyen@xxxxxxxxxxxxxxxxxxxxx>
> ---
> v5: updated error conditions for not finding the reset property
> v4: use dev_dbg() if not a -EPROBE_DEFER
> v3: fix compile error
> v2: move to lowlevel_hw_init()
> ---
> drivers/usb/dwc2/core.h | 1 +
> drivers/usb/dwc2/platform.c | 20 ++++++++++++++++++++
> 2 files changed, 21 insertions(+)
>
> diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
> index 3c58d63..f748132 100644
> --- a/drivers/usb/dwc2/core.h
> +++ b/drivers/usb/dwc2/core.h
> @@ -837,6 +837,7 @@ struct dwc2_hsotg {
> void *priv;
> int irq;
> struct clk *clk;
> + struct reset_control *reset;
>
> unsigned int queuing_high_bandwidth:1;
> unsigned int srp_success:1;
> diff --git a/drivers/usb/dwc2/platform.c b/drivers/usb/dwc2/platform.c
> index 88629be..2861c89 100644
> --- a/drivers/usb/dwc2/platform.c
> +++ b/drivers/usb/dwc2/platform.c
> @@ -45,6 +45,7 @@
> #include <linux/platform_device.h>
> #include <linux/phy/phy.h>
> #include <linux/platform_data/s3c-hsotg.h>
> +#include <linux/reset.h>
>
> #include <linux/usb/of.h>
>
> @@ -337,6 +338,22 @@ static int dwc2_lowlevel_hw_init(struct dwc2_hsotg *hsotg)
> {
> int i, ret;
>
> + hsotg->reset = devm_reset_control_get(hsotg->dev, "dwc2");
> + if (IS_ERR(hsotg->reset)) {
> + ret = PTR_ERR(hsotg->reset);
> + switch (ret) {
> + case -ENOENT:
> + hsotg->reset = NULL;
> + break;
> + default:
> + dev_err(hsotg->dev, "error getting reset control %d\n", ret);
Please address checkpatch, line over 80 characters.
Thanks,
John
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