Re: [PATCH v4 4/5] usb: chipidea: ci_hdrc_imx: Set out of band wakeup for i.MX95

Peter Chen (CIX)
2025-09-24T00:52:11Z

On 25-09-22 10:21:09, Peng Fan wrote:
> i.MX95 USB2 inside HSIOMIX could still wakeup Linux, even if HSIOMIX
> power domain(Digital logic) is off. There is still always on logic
> have the wakeup capability which is out band wakeup capbility.
>
> So use device_set_out_band_wakeup for i.MX95 to make sure usb2 could
> wakeup system even if HSIOMIX power domain is in off state.
>
> Tested-by: Xu Yang <xu.yang_2@nxp.com>
> Reviewed-by: Xu Yang <xu.yang_2@nxp.com>
> Signed-off-by: Peng Fan <peng.fan@nxp.com>

Acked-by: Peter Chen <peter.chen@kernel.org>

Feel free add my ack if power part has accepted.

Peter
> ---
> drivers/usb/chipidea/ci_hdrc_imx.c | 11 ++++++++++-
> include/linux/usb/chipidea.h | 1 +
> 2 files changed, 11 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/usb/chipidea/ci_hdrc_imx.c b/drivers/usb/chipidea/ci_hdrc_imx.c
> index d7c2a1a3c2715967203b98c819fa864e06a00a32..d4ee9e16332fe8b506711e4739c9008f73a377bf 100644
> --- a/drivers/usb/chipidea/ci_hdrc_imx.c
> +++ b/drivers/usb/chipidea/ci_hdrc_imx.c
> @@ -79,6 +79,10 @@ static const struct ci_hdrc_imx_platform_flag imx8ulp_usb_data = {
> CI_HDRC_HAS_PORTSC_PEC_MISSED,
> };
>
> +static const struct ci_hdrc_imx_platform_flag imx95_usb_data = {
> + .flags = CI_HDRC_SUPPORTS_RUNTIME_PM | CI_HDRC_OUT_BAND_WAKEUP,
> +};
> +
> static const struct ci_hdrc_imx_platform_flag s32g_usb_data = {
> .flags = CI_HDRC_DISABLE_HOST_STREAMING,
> };
> @@ -94,6 +98,7 @@ static const struct of_device_id ci_hdrc_imx_dt_ids[] = {
> { .compatible = "fsl,imx7d-usb", .data = &imx7d_usb_data},
> { .compatible = "fsl,imx7ulp-usb", .data = &imx7ulp_usb_data},
> { .compatible = "fsl,imx8ulp-usb", .data = &imx8ulp_usb_data},
> + { .compatible = "fsl,imx95-usb", .data = &imx95_usb_data},
> { .compatible = "nxp,s32g2-usb", .data = &s32g_usb_data},
> { /* sentinel */ }
> };
> @@ -704,9 +709,13 @@ static int ci_hdrc_imx_suspend(struct device *dev)
>
> pinctrl_pm_select_sleep_state(dev);
>
> - if (data->wakeup_irq > 0 && device_may_wakeup(dev))
> + if (data->wakeup_irq > 0 && device_may_wakeup(dev)) {
> enable_irq_wake(data->wakeup_irq);
>
> + if (data->plat_data->flags & CI_HDRC_OUT_BAND_WAKEUP)
> + device_set_out_band_wakeup(dev);
> + }
> +
> return ret;
> }
>
> diff --git a/include/linux/usb/chipidea.h b/include/linux/usb/chipidea.h
> index e17ebeee24e3ecc4b1c2d153d9ea9b656b5a3d35..c6451191d2de68607a9380482701d11f949d0ff7 100644
> --- a/include/linux/usb/chipidea.h
> +++ b/include/linux/usb/chipidea.h
> @@ -66,6 +66,7 @@ struct ci_hdrc_platform_data {
> #define CI_HDRC_HAS_PORTSC_PEC_MISSED BIT(17)
> #define CI_HDRC_FORCE_VBUS_ACTIVE_ALWAYS BIT(18)
> #define CI_HDRC_HAS_SHORT_PKT_LIMIT BIT(19)
> +#define CI_HDRC_OUT_BAND_WAKEUP BIT(20)
> enum usb_dr_mode dr_mode;
> #define CI_HDRC_CONTROLLER_RESET_EVENT 0
> #define CI_HDRC_CONTROLLER_STOPPED_EVENT 1
>
> --
> 2.37.1
>

--

Best regards,
Peter