Re: [PATCH 3/4] usb: chipidea: s32g: Add usb support for s32g2

[Frank Li <Frank.li@nxp.com>]

On Wed, May 28, 2025 at 10:57:27PM +0300, Dan Carpenter wrote:
> From: Ghennadi Procopciuc <ghennadi.procopciuc@nxp.com>
>
> Enable USB driver for s32g2.
>
> Signed-off-by: Ghennadi Procopciuc <ghennadi.procopciuc@nxp.com>
> Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
> ---
>  drivers/usb/chipidea/ci_hdrc_imx.c |  6 +++
>  drivers/usb/chipidea/usbmisc_imx.c | 69 ++++++++++++++++++++++++++++++
>  2 files changed, 75 insertions(+)
>
> diff --git a/drivers/usb/chipidea/ci_hdrc_imx.c b/drivers/usb/chipidea/ci_hdrc_imx.c
> index 780f4d151345..ce207f8566d5 100644
> --- a/drivers/usb/chipidea/ci_hdrc_imx.c
> +++ b/drivers/usb/chipidea/ci_hdrc_imx.c
> @@ -1,6 +1,7 @@
>  // SPDX-License-Identifier: GPL-2.0+
>  /*
>   * Copyright 2012 Freescale Semiconductor, Inc.
> + * Copyright 2020 NXP

2025?

Frank

>   * Copyright (C) 2012 Marek Vasut <marex@denx.de>
>   * on behalf of DENX Software Engineering GmbH
>   */
> @@ -78,6 +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 s32g_usb_data = {
> +	.flags = CI_HDRC_DISABLE_HOST_STREAMING,
> +};
> +
>  static const struct of_device_id ci_hdrc_imx_dt_ids[] = {
>  	{ .compatible = "fsl,imx23-usb", .data = &imx23_usb_data},
>  	{ .compatible = "fsl,imx28-usb", .data = &imx28_usb_data},
> @@ -89,6 +94,7 @@ 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 = "nxp,s32g2-usb", .data = &s32g_usb_data},
>  	{ /* sentinel */ }
>  };
>  MODULE_DEVICE_TABLE(of, ci_hdrc_imx_dt_ids);
> diff --git a/drivers/usb/chipidea/usbmisc_imx.c b/drivers/usb/chipidea/usbmisc_imx.c
> index 95759a4ec60c..43098a150e83 100644
> --- a/drivers/usb/chipidea/usbmisc_imx.c
> +++ b/drivers/usb/chipidea/usbmisc_imx.c
> @@ -1,6 +1,7 @@
>  // SPDX-License-Identifier: GPL-2.0+
>  /*
>   * Copyright 2012 Freescale Semiconductor, Inc.
> + * Copyright 2020 NXP
>   */
>
>  #include <linux/module.h>
> @@ -158,6 +159,18 @@
>  /* Flags for 'struct imx_usbmisc' */
>  #define REINIT_DURING_RESUME	BIT(1)
>
> +#define S32G_WAKEUP_IE		BIT(0)
> +#define S32G_CORE_IE		BIT(1)
> +#define S32G_PWRFLTEN		BIT(7)
> +#define S32G_WAKEUPCTRL		BIT(10)
> +#define S32G_WAKEUPEN		BIT(11)
> +
> +/* Workaround errata ERR050474 (handle packages that aren't 4 byte aligned) */
> +#define S32G_UCMALLBE		BIT(15)
> +
> +#define S32G_WAKEUP_BITS (S32G_WAKEUP_IE | S32G_CORE_IE | S32G_WAKEUPEN | \
> +			  S32G_WAKEUPCTRL)
> +
>  struct usbmisc_ops {
>  	/* It's called once when probe a usb device */
>  	int (*init)(struct imx_usbmisc_data *data);
> @@ -618,6 +631,52 @@ static int usbmisc_vf610_init(struct imx_usbmisc_data *data)
>  	return 0;
>  }
>
> +static int usbmisc_s32g_set_wakeup(struct imx_usbmisc_data *data, bool enabled)
> +{
> +	struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
> +	unsigned long flags;
> +	u32 reg;
> +
> +	spin_lock_irqsave(&usbmisc->lock, flags);
> +
> +	reg = readl(usbmisc->base);
> +	if (enabled)
> +		reg |= S32G_WAKEUP_BITS;
> +	else
> +		reg &= ~S32G_WAKEUP_BITS;
> +
> +	writel(reg, usbmisc->base);
> +	spin_unlock_irqrestore(&usbmisc->lock, flags);
> +
> +	return 0;
> +}
> +
> +static int usbmisc_s32g_init(struct imx_usbmisc_data *data, u32 extra_flags)
> +{
> +	struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
> +	unsigned long flags;
> +	u32 reg;
> +
> +	spin_lock_irqsave(&usbmisc->lock, flags);
> +
> +	reg = readl(usbmisc->base);
> +
> +	reg |= S32G_PWRFLTEN;
> +	reg |= extra_flags;
> +
> +	writel(reg, usbmisc->base);
> +
> +	spin_unlock_irqrestore(&usbmisc->lock, flags);
> +	usbmisc_s32g_set_wakeup(data, false);
> +
> +	return 0;
> +}
> +
> +static int usbmisc_s32g2_init(struct imx_usbmisc_data *data)
> +{
> +	return usbmisc_s32g_init(data, S32G_UCMALLBE);
> +}
> +
>  static int usbmisc_imx7d_set_wakeup
>  	(struct imx_usbmisc_data *data, bool enabled)
>  {
> @@ -1135,6 +1194,12 @@ static const struct usbmisc_ops imx95_usbmisc_ops = {
>  	.vbus_comparator_on = usbmisc_imx7d_vbus_comparator_on,
>  };
>
> +static const struct usbmisc_ops s32g2_usbmisc_ops = {
> +	.init = usbmisc_s32g2_init,
> +	.set_wakeup = usbmisc_s32g_set_wakeup,
> +	.flags = REINIT_DURING_RESUME,
> +};
> +
>  static inline bool is_imx53_usbmisc(struct imx_usbmisc_data *data)
>  {
>  	struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
> @@ -1363,6 +1428,10 @@ static const struct of_device_id usbmisc_imx_dt_ids[] = {
>  		.compatible = "fsl,imx95-usbmisc",
>  		.data = &imx95_usbmisc_ops,
>  	},
> +	{
> +		.compatible = "nxp,s32g2-usbmisc",
> +		.data = &s32g2_usbmisc_ops,
> +	},
>  	{ /* sentinel */ }
>  };
>  MODULE_DEVICE_TABLE(of, usbmisc_imx_dt_ids);
> --
> 2.47.2
>