diff mbox series

[net-next,v7,3/4] net: stmmac: Add DWMAC glue layer for Renesas GBETH

Message ID 20250416104015.47788-4-prabhakar.mahadev-lad.rj@bp.renesas.com (mailing list archive)
State Superseded
Delegated to: Geert Uytterhoeven
Headers show
Series Add GBETH glue layer driver for Renesas RZ/V2H(P) SoC | expand

Commit Message

Prabhakar April 16, 2025, 10:40 a.m. UTC 
From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>

Add the DWMAC glue layer for the GBETH IP found in the Renesas RZ/V2H(P)
SoC.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
---
 drivers/net/ethernet/stmicro/stmmac/Kconfig   |  11 ++
 drivers/net/ethernet/stmicro/stmmac/Makefile  |   1 +
 .../stmicro/stmmac/dwmac-renesas-gbeth.c      | 146 ++++++++++++++++++
 3 files changed, 158 insertions(+)
 create mode 100644 drivers/net/ethernet/stmicro/stmmac/dwmac-renesas-gbeth.c

Comments

Biju Das April 16, 2025, 10:44 a.m. UTC | #1 
Hi Prabhakar,

Thanks for the patch.

> -----Original Message-----
> From: Prabhakar <prabhakar.csengg@gmail.com>
> Sent: 16 April 2025 11:40
> Subject: [PATCH net-next v7 3/4] net: stmmac: Add DWMAC glue layer for Renesas GBETH
> 
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> 
> Add the DWMAC glue layer for the GBETH IP found in the Renesas RZ/V2H(P) SoC.
> 
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
> ---
>  drivers/net/ethernet/stmicro/stmmac/Kconfig   |  11 ++
>  drivers/net/ethernet/stmicro/stmmac/Makefile  |   1 +
>  .../stmicro/stmmac/dwmac-renesas-gbeth.c      | 146 ++++++++++++++++++
>  3 files changed, 158 insertions(+)
>  create mode 100644 drivers/net/ethernet/stmicro/stmmac/dwmac-renesas-gbeth.c
> 
> diff --git a/drivers/net/ethernet/stmicro/stmmac/Kconfig b/drivers/net/ethernet/stmicro/stmmac/Kconfig
> index 3c820ef56775..2c99b23f0faa 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/Kconfig
> +++ b/drivers/net/ethernet/stmicro/stmmac/Kconfig
> @@ -131,6 +131,17 @@ config DWMAC_QCOM_ETHQOS
>  	  This selects the Qualcomm ETHQOS glue layer support for the
>  	  stmmac device driver.
> 
> +config DWMAC_RENESAS_GBETH
> +	tristate "Renesas RZ/V2H(P) GBETH support"
> +	default ARCH_RENESAS
> +	depends on OF && (ARCH_RENESAS || COMPILE_TEST)
> +	help
> +	  Support for Gigabit Ethernet Interface (GBETH) on Renesas
> +	  RZ/V2H(P) SoCs.
> +
> +	  This selects the Renesas RZ/V2H(P) Soc specific glue layer support
> +	  for the stmmac device driver.
> +
>  config DWMAC_ROCKCHIP
>  	tristate "Rockchip dwmac support"
>  	default ARCH_ROCKCHIP
> diff --git a/drivers/net/ethernet/stmicro/stmmac/Makefile
> b/drivers/net/ethernet/stmicro/stmmac/Makefile
> index 594883fb4164..91050215511b 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/Makefile
> +++ b/drivers/net/ethernet/stmicro/stmmac/Makefile
> @@ -20,6 +20,7 @@ obj-$(CONFIG_DWMAC_LPC18XX)	+= dwmac-lpc18xx.o
>  obj-$(CONFIG_DWMAC_MEDIATEK)	+= dwmac-mediatek.o
>  obj-$(CONFIG_DWMAC_MESON)	+= dwmac-meson.o dwmac-meson8b.o
>  obj-$(CONFIG_DWMAC_QCOM_ETHQOS)	+= dwmac-qcom-ethqos.o
> +obj-$(CONFIG_DWMAC_RENESAS_GBETH) += dwmac-renesas-gbeth.o
>  obj-$(CONFIG_DWMAC_ROCKCHIP)	+= dwmac-rk.o
>  obj-$(CONFIG_DWMAC_RZN1)	+= dwmac-rzn1.o
>  obj-$(CONFIG_DWMAC_S32)		+= dwmac-s32.o
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-renesas-gbeth.c
> b/drivers/net/ethernet/stmicro/stmmac/dwmac-renesas-gbeth.c
> new file mode 100644
> index 000000000000..f34bec7794e2
> --- /dev/null
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-renesas-gbeth.c
> @@ -0,0 +1,146 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * dwmac-renesas-gbeth.c - DWMAC Specific Glue layer for Renesas GBETH
> + *
> + * The Rx and Tx clocks are supplied as follows for the GBETH IP.
> + *
> + *                         Rx / Tx
> + *   -------+------------- on / off -------
> + *          |
> + *          |            Rx-180 / Tx-180
> + *          +---- not ---- on / off -------
> + *
> + * Copyright (C) 2025 Renesas Electronics Corporation  */
> +
> +#include <linux/clk.h>
> +#include <linux/device.h>
> +#include <linux/module.h>
> +#include <linux/platform_device.h>
> +#include <linux/reset.h>
> +
> +#include "stmmac_platform.h"
> +
> +struct renesas_gbeth {
> +	struct plat_stmmacenet_data *plat_dat;
> +	struct reset_control *rstc;
> +	struct device *dev;
> +};
> +
> +static const char *const renesas_gbeth_clks[] = {
> +	"tx", "tx-180", "rx", "rx-180",
> +};
> +
> +static int renesas_gbeth_init(struct platform_device *pdev, void *priv)
> +{
> +	struct plat_stmmacenet_data *plat_dat;
> +	struct renesas_gbeth *gbeth = priv;
> +	int ret;
> +
> +	plat_dat = gbeth->plat_dat;
> +
> +	ret = reset_control_deassert(gbeth->rstc);
> +	if (ret) {
> +		dev_err(gbeth->dev, "Reset deassert failed\n");
> +		return ret;
> +	}
> +
> +	ret = clk_bulk_prepare_enable(plat_dat->num_clks,
> +				      plat_dat->clks);
> +	if (ret)
> +		reset_control_assert(gbeth->rstc);
> +
> +	return 0;

	return ret??

Cheers,
Biju

> +}
> +
> +static void renesas_gbeth_exit(struct platform_device *pdev, void
> +*priv) {
> +	struct plat_stmmacenet_data *plat_dat;
> +	struct renesas_gbeth *gbeth = priv;
> +	int ret;
> +
> +	plat_dat = gbeth->plat_dat;
> +
> +	clk_bulk_disable_unprepare(plat_dat->num_clks, plat_dat->clks);
> +
> +	ret = reset_control_assert(gbeth->rstc);
> +	if (ret)
> +		dev_err(gbeth->dev, "Reset assert failed\n"); }
> +
> +static int renesas_gbeth_probe(struct platform_device *pdev) {
> +	struct plat_stmmacenet_data *plat_dat;
> +	struct stmmac_resources stmmac_res;
> +	struct device *dev = &pdev->dev;
> +	struct renesas_gbeth *gbeth;
> +	unsigned int i;
> +	int err;
> +
> +	err = stmmac_get_platform_resources(pdev, &stmmac_res);
> +	if (err)
> +		return dev_err_probe(dev, err,
> +				     "failed to get resources\n");
> +
> +	plat_dat = devm_stmmac_probe_config_dt(pdev, stmmac_res.mac);
> +	if (IS_ERR(plat_dat))
> +		return dev_err_probe(dev, PTR_ERR(plat_dat),
> +				     "dt configuration failed\n");
> +
> +	gbeth = devm_kzalloc(dev, sizeof(*gbeth), GFP_KERNEL);
> +	if (!gbeth)
> +		return -ENOMEM;
> +
> +	plat_dat->num_clks = ARRAY_SIZE(renesas_gbeth_clks);
> +	plat_dat->clks = devm_kcalloc(dev, plat_dat->num_clks,
> +				      sizeof(*plat_dat->clks), GFP_KERNEL);
> +	if (!plat_dat->clks)
> +		return -ENOMEM;
> +
> +	for (i = 0; i < plat_dat->num_clks; i++)
> +		plat_dat->clks[i].id = renesas_gbeth_clks[i];
> +
> +	err = devm_clk_bulk_get(dev, plat_dat->num_clks, plat_dat->clks);
> +	if (err < 0)
> +		return err;
> +
> +	plat_dat->clk_tx_i = stmmac_pltfr_find_clk(plat_dat, "tx");
> +	if (!plat_dat->clk_tx_i)
> +		return dev_err_probe(dev, -EINVAL,
> +				     "error finding tx clock\n");
> +
> +	gbeth->rstc = devm_reset_control_get_exclusive(dev, NULL);
> +	if (IS_ERR(gbeth->rstc))
> +		return PTR_ERR(gbeth->rstc);
> +
> +	gbeth->dev = dev;
> +	gbeth->plat_dat = plat_dat;
> +	plat_dat->bsp_priv = gbeth;
> +	plat_dat->set_clk_tx_rate = stmmac_set_clk_tx_rate;
> +	plat_dat->init = renesas_gbeth_init;
> +	plat_dat->exit = renesas_gbeth_exit;
> +	plat_dat->flags |= STMMAC_FLAG_HWTSTAMP_CORRECT_LATENCY |
> +			   STMMAC_FLAG_EN_TX_LPI_CLK_PHY_CAP |
> +			   STMMAC_FLAG_SPH_DISABLE;
> +
> +	return devm_stmmac_pltfr_probe(pdev, plat_dat, &stmmac_res); }
> +
> +static const struct of_device_id renesas_gbeth_match[] = {
> +	{ .compatible = "renesas,rzv2h-gbeth", },
> +	{ /* Sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(of, renesas_gbeth_match);
> +
> +static struct platform_driver renesas_gbeth_driver = {
> +	.probe  = renesas_gbeth_probe,
> +	.driver = {
> +		.name		= "renesas-gbeth",
> +		.of_match_table	= renesas_gbeth_match,
> +	},
> +};
> +module_platform_driver(renesas_gbeth_driver);
> +
> +MODULE_AUTHOR("Lad Prabhakar
> +<prabhakar.mahadev-lad.rj@bp.renesas.com>");
> +MODULE_DESCRIPTION("Renesas GBETH DWMAC Specific Glue layer");
> +MODULE_LICENSE("GPL");
> --
> 2.49.0
Prabhakar April 16, 2025, 10:44 a.m. UTC | #2 
Hi All,

On Wed, Apr 16, 2025 at 11:40 AM Prabhakar <prabhakar.csengg@gmail.com> wrote:
>
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
>
> Add the DWMAC glue layer for the GBETH IP found in the Renesas RZ/V2H(P)
> SoC.
>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
> ---
>  drivers/net/ethernet/stmicro/stmmac/Kconfig   |  11 ++
>  drivers/net/ethernet/stmicro/stmmac/Makefile  |   1 +
>  .../stmicro/stmmac/dwmac-renesas-gbeth.c      | 146 ++++++++++++++++++
>  3 files changed, 158 insertions(+)
>  create mode 100644 drivers/net/ethernet/stmicro/stmmac/dwmac-renesas-gbeth.c
>
> diff --git a/drivers/net/ethernet/stmicro/stmmac/Kconfig b/drivers/net/ethernet/stmicro/stmmac/Kconfig
> index 3c820ef56775..2c99b23f0faa 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/Kconfig
> +++ b/drivers/net/ethernet/stmicro/stmmac/Kconfig
> @@ -131,6 +131,17 @@ config DWMAC_QCOM_ETHQOS
>           This selects the Qualcomm ETHQOS glue layer support for the
>           stmmac device driver.
>
> +config DWMAC_RENESAS_GBETH
> +       tristate "Renesas RZ/V2H(P) GBETH support"
> +       default ARCH_RENESAS
> +       depends on OF && (ARCH_RENESAS || COMPILE_TEST)
> +       help
> +         Support for Gigabit Ethernet Interface (GBETH) on Renesas
> +         RZ/V2H(P) SoCs.
> +
> +         This selects the Renesas RZ/V2H(P) Soc specific glue layer support
> +         for the stmmac device driver.
> +
>  config DWMAC_ROCKCHIP
>         tristate "Rockchip dwmac support"
>         default ARCH_ROCKCHIP
> diff --git a/drivers/net/ethernet/stmicro/stmmac/Makefile b/drivers/net/ethernet/stmicro/stmmac/Makefile
> index 594883fb4164..91050215511b 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/Makefile
> +++ b/drivers/net/ethernet/stmicro/stmmac/Makefile
> @@ -20,6 +20,7 @@ obj-$(CONFIG_DWMAC_LPC18XX)   += dwmac-lpc18xx.o
>  obj-$(CONFIG_DWMAC_MEDIATEK)   += dwmac-mediatek.o
>  obj-$(CONFIG_DWMAC_MESON)      += dwmac-meson.o dwmac-meson8b.o
>  obj-$(CONFIG_DWMAC_QCOM_ETHQOS)        += dwmac-qcom-ethqos.o
> +obj-$(CONFIG_DWMAC_RENESAS_GBETH) += dwmac-renesas-gbeth.o
>  obj-$(CONFIG_DWMAC_ROCKCHIP)   += dwmac-rk.o
>  obj-$(CONFIG_DWMAC_RZN1)       += dwmac-rzn1.o
>  obj-$(CONFIG_DWMAC_S32)                += dwmac-s32.o
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-renesas-gbeth.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-renesas-gbeth.c
> new file mode 100644
> index 000000000000..f34bec7794e2
> --- /dev/null
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-renesas-gbeth.c
> @@ -0,0 +1,146 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * dwmac-renesas-gbeth.c - DWMAC Specific Glue layer for Renesas GBETH
> + *
> + * The Rx and Tx clocks are supplied as follows for the GBETH IP.
> + *
> + *                         Rx / Tx
> + *   -------+------------- on / off -------
> + *          |
> + *          |            Rx-180 / Tx-180
> + *          +---- not ---- on / off -------
> + *
> + * Copyright (C) 2025 Renesas Electronics Corporation
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/device.h>
> +#include <linux/module.h>
> +#include <linux/platform_device.h>
> +#include <linux/reset.h>
> +
> +#include "stmmac_platform.h"
> +
> +struct renesas_gbeth {
> +       struct plat_stmmacenet_data *plat_dat;
> +       struct reset_control *rstc;
> +       struct device *dev;
> +};
> +
> +static const char *const renesas_gbeth_clks[] = {
> +       "tx", "tx-180", "rx", "rx-180",
> +};
> +
> +static int renesas_gbeth_init(struct platform_device *pdev, void *priv)
> +{
> +       struct plat_stmmacenet_data *plat_dat;
> +       struct renesas_gbeth *gbeth = priv;
> +       int ret;
> +
> +       plat_dat = gbeth->plat_dat;
> +
> +       ret = reset_control_deassert(gbeth->rstc);
> +       if (ret) {
> +               dev_err(gbeth->dev, "Reset deassert failed\n");
> +               return ret;
> +       }
> +
> +       ret = clk_bulk_prepare_enable(plat_dat->num_clks,
> +                                     plat_dat->clks);
> +       if (ret)
> +               reset_control_assert(gbeth->rstc);
> +
> +       return 0;
Just noticed this has to be ret, I'll send a new version fixing this.

Cheers,
Prabhakar
Prabhakar April 16, 2025, 11:24 a.m. UTC | #3 
Hi Biju,

Thank you for the review.

On Wed, Apr 16, 2025 at 11:44 AM Biju Das <biju.das.jz@bp.renesas.com> wrote:
>
> Hi Prabhakar,
>
> Thanks for the patch.
>
> > -----Original Message-----
> > From: Prabhakar <prabhakar.csengg@gmail.com>
> > Sent: 16 April 2025 11:40
> > Subject: [PATCH net-next v7 3/4] net: stmmac: Add DWMAC glue layer for Renesas GBETH
> >
> > From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> >
> > Add the DWMAC glue layer for the GBETH IP found in the Renesas RZ/V2H(P) SoC.
> >
> > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> > Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
> > ---
> >  drivers/net/ethernet/stmicro/stmmac/Kconfig   |  11 ++
> >  drivers/net/ethernet/stmicro/stmmac/Makefile  |   1 +
> >  .../stmicro/stmmac/dwmac-renesas-gbeth.c      | 146 ++++++++++++++++++
> >  3 files changed, 158 insertions(+)
> >  create mode 100644 drivers/net/ethernet/stmicro/stmmac/dwmac-renesas-gbeth.c
> >
> > diff --git a/drivers/net/ethernet/stmicro/stmmac/Kconfig b/drivers/net/ethernet/stmicro/stmmac/Kconfig
> > index 3c820ef56775..2c99b23f0faa 100644
> > --- a/drivers/net/ethernet/stmicro/stmmac/Kconfig
> > +++ b/drivers/net/ethernet/stmicro/stmmac/Kconfig
> > @@ -131,6 +131,17 @@ config DWMAC_QCOM_ETHQOS
> >         This selects the Qualcomm ETHQOS glue layer support for the
> >         stmmac device driver.
> >
> > +config DWMAC_RENESAS_GBETH
> > +     tristate "Renesas RZ/V2H(P) GBETH support"
> > +     default ARCH_RENESAS
> > +     depends on OF && (ARCH_RENESAS || COMPILE_TEST)
> > +     help
> > +       Support for Gigabit Ethernet Interface (GBETH) on Renesas
> > +       RZ/V2H(P) SoCs.
> > +
> > +       This selects the Renesas RZ/V2H(P) Soc specific glue layer support
> > +       for the stmmac device driver.
> > +
> >  config DWMAC_ROCKCHIP
> >       tristate "Rockchip dwmac support"
> >       default ARCH_ROCKCHIP
> > diff --git a/drivers/net/ethernet/stmicro/stmmac/Makefile
> > b/drivers/net/ethernet/stmicro/stmmac/Makefile
> > index 594883fb4164..91050215511b 100644
> > --- a/drivers/net/ethernet/stmicro/stmmac/Makefile
> > +++ b/drivers/net/ethernet/stmicro/stmmac/Makefile
> > @@ -20,6 +20,7 @@ obj-$(CONFIG_DWMAC_LPC18XX) += dwmac-lpc18xx.o
> >  obj-$(CONFIG_DWMAC_MEDIATEK) += dwmac-mediatek.o
> >  obj-$(CONFIG_DWMAC_MESON)    += dwmac-meson.o dwmac-meson8b.o
> >  obj-$(CONFIG_DWMAC_QCOM_ETHQOS)      += dwmac-qcom-ethqos.o
> > +obj-$(CONFIG_DWMAC_RENESAS_GBETH) += dwmac-renesas-gbeth.o
> >  obj-$(CONFIG_DWMAC_ROCKCHIP) += dwmac-rk.o
> >  obj-$(CONFIG_DWMAC_RZN1)     += dwmac-rzn1.o
> >  obj-$(CONFIG_DWMAC_S32)              += dwmac-s32.o
> > diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-renesas-gbeth.c
> > b/drivers/net/ethernet/stmicro/stmmac/dwmac-renesas-gbeth.c
> > new file mode 100644
> > index 000000000000..f34bec7794e2
> > --- /dev/null
> > +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-renesas-gbeth.c
> > @@ -0,0 +1,146 @@
> > +// SPDX-License-Identifier: GPL-2.0+
> > +/*
> > + * dwmac-renesas-gbeth.c - DWMAC Specific Glue layer for Renesas GBETH
> > + *
> > + * The Rx and Tx clocks are supplied as follows for the GBETH IP.
> > + *
> > + *                         Rx / Tx
> > + *   -------+------------- on / off -------
> > + *          |
> > + *          |            Rx-180 / Tx-180
> > + *          +---- not ---- on / off -------
> > + *
> > + * Copyright (C) 2025 Renesas Electronics Corporation  */
> > +
> > +#include <linux/clk.h>
> > +#include <linux/device.h>
> > +#include <linux/module.h>
> > +#include <linux/platform_device.h>
> > +#include <linux/reset.h>
> > +
> > +#include "stmmac_platform.h"
> > +
> > +struct renesas_gbeth {
> > +     struct plat_stmmacenet_data *plat_dat;
> > +     struct reset_control *rstc;
> > +     struct device *dev;
> > +};
> > +
> > +static const char *const renesas_gbeth_clks[] = {
> > +     "tx", "tx-180", "rx", "rx-180",
> > +};
> > +
> > +static int renesas_gbeth_init(struct platform_device *pdev, void *priv)
> > +{
> > +     struct plat_stmmacenet_data *plat_dat;
> > +     struct renesas_gbeth *gbeth = priv;
> > +     int ret;
> > +
> > +     plat_dat = gbeth->plat_dat;
> > +
> > +     ret = reset_control_deassert(gbeth->rstc);
> > +     if (ret) {
> > +             dev_err(gbeth->dev, "Reset deassert failed\n");
> > +             return ret;
> > +     }
> > +
> > +     ret = clk_bulk_prepare_enable(plat_dat->num_clks,
> > +                                   plat_dat->clks);
> > +     if (ret)
> > +             reset_control_assert(gbeth->rstc);
> > +
> > +     return 0;
>
>         return ret??
>
Indeed I missed it.

Cheers,
Prabhakar
diff mbox series

Patch

diff --git a/drivers/net/ethernet/stmicro/stmmac/Kconfig b/drivers/net/ethernet/stmicro/stmmac/Kconfig
index 3c820ef56775..2c99b23f0faa 100644
--- a/drivers/net/ethernet/stmicro/stmmac/Kconfig
+++ b/drivers/net/ethernet/stmicro/stmmac/Kconfig
@@ -131,6 +131,17 @@  config DWMAC_QCOM_ETHQOS
 	  This selects the Qualcomm ETHQOS glue layer support for the
 	  stmmac device driver.
 
+config DWMAC_RENESAS_GBETH
+	tristate "Renesas RZ/V2H(P) GBETH support"
+	default ARCH_RENESAS
+	depends on OF && (ARCH_RENESAS || COMPILE_TEST)
+	help
+	  Support for Gigabit Ethernet Interface (GBETH) on Renesas
+	  RZ/V2H(P) SoCs.
+
+	  This selects the Renesas RZ/V2H(P) Soc specific glue layer support
+	  for the stmmac device driver.
+
 config DWMAC_ROCKCHIP
 	tristate "Rockchip dwmac support"
 	default ARCH_ROCKCHIP
diff --git a/drivers/net/ethernet/stmicro/stmmac/Makefile b/drivers/net/ethernet/stmicro/stmmac/Makefile
index 594883fb4164..91050215511b 100644
--- a/drivers/net/ethernet/stmicro/stmmac/Makefile
+++ b/drivers/net/ethernet/stmicro/stmmac/Makefile
@@ -20,6 +20,7 @@  obj-$(CONFIG_DWMAC_LPC18XX)	+= dwmac-lpc18xx.o
 obj-$(CONFIG_DWMAC_MEDIATEK)	+= dwmac-mediatek.o
 obj-$(CONFIG_DWMAC_MESON)	+= dwmac-meson.o dwmac-meson8b.o
 obj-$(CONFIG_DWMAC_QCOM_ETHQOS)	+= dwmac-qcom-ethqos.o
+obj-$(CONFIG_DWMAC_RENESAS_GBETH) += dwmac-renesas-gbeth.o
 obj-$(CONFIG_DWMAC_ROCKCHIP)	+= dwmac-rk.o
 obj-$(CONFIG_DWMAC_RZN1)	+= dwmac-rzn1.o
 obj-$(CONFIG_DWMAC_S32)		+= dwmac-s32.o
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-renesas-gbeth.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-renesas-gbeth.c
new file mode 100644
index 000000000000..f34bec7794e2
--- /dev/null
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-renesas-gbeth.c
@@ -0,0 +1,146 @@ 
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * dwmac-renesas-gbeth.c - DWMAC Specific Glue layer for Renesas GBETH
+ *
+ * The Rx and Tx clocks are supplied as follows for the GBETH IP.
+ *
+ *                         Rx / Tx
+ *   -------+------------- on / off -------
+ *          |
+ *          |            Rx-180 / Tx-180
+ *          +---- not ---- on / off -------
+ *
+ * Copyright (C) 2025 Renesas Electronics Corporation
+ */
+
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/reset.h>
+
+#include "stmmac_platform.h"
+
+struct renesas_gbeth {
+	struct plat_stmmacenet_data *plat_dat;
+	struct reset_control *rstc;
+	struct device *dev;
+};
+
+static const char *const renesas_gbeth_clks[] = {
+	"tx", "tx-180", "rx", "rx-180",
+};
+
+static int renesas_gbeth_init(struct platform_device *pdev, void *priv)
+{
+	struct plat_stmmacenet_data *plat_dat;
+	struct renesas_gbeth *gbeth = priv;
+	int ret;
+
+	plat_dat = gbeth->plat_dat;
+
+	ret = reset_control_deassert(gbeth->rstc);
+	if (ret) {
+		dev_err(gbeth->dev, "Reset deassert failed\n");
+		return ret;
+	}
+
+	ret = clk_bulk_prepare_enable(plat_dat->num_clks,
+				      plat_dat->clks);
+	if (ret)
+		reset_control_assert(gbeth->rstc);
+
+	return 0;
+}
+
+static void renesas_gbeth_exit(struct platform_device *pdev, void *priv)
+{
+	struct plat_stmmacenet_data *plat_dat;
+	struct renesas_gbeth *gbeth = priv;
+	int ret;
+
+	plat_dat = gbeth->plat_dat;
+
+	clk_bulk_disable_unprepare(plat_dat->num_clks, plat_dat->clks);
+
+	ret = reset_control_assert(gbeth->rstc);
+	if (ret)
+		dev_err(gbeth->dev, "Reset assert failed\n");
+}
+
+static int renesas_gbeth_probe(struct platform_device *pdev)
+{
+	struct plat_stmmacenet_data *plat_dat;
+	struct stmmac_resources stmmac_res;
+	struct device *dev = &pdev->dev;
+	struct renesas_gbeth *gbeth;
+	unsigned int i;
+	int err;
+
+	err = stmmac_get_platform_resources(pdev, &stmmac_res);
+	if (err)
+		return dev_err_probe(dev, err,
+				     "failed to get resources\n");
+
+	plat_dat = devm_stmmac_probe_config_dt(pdev, stmmac_res.mac);
+	if (IS_ERR(plat_dat))
+		return dev_err_probe(dev, PTR_ERR(plat_dat),
+				     "dt configuration failed\n");
+
+	gbeth = devm_kzalloc(dev, sizeof(*gbeth), GFP_KERNEL);
+	if (!gbeth)
+		return -ENOMEM;
+
+	plat_dat->num_clks = ARRAY_SIZE(renesas_gbeth_clks);
+	plat_dat->clks = devm_kcalloc(dev, plat_dat->num_clks,
+				      sizeof(*plat_dat->clks), GFP_KERNEL);
+	if (!plat_dat->clks)
+		return -ENOMEM;
+
+	for (i = 0; i < plat_dat->num_clks; i++)
+		plat_dat->clks[i].id = renesas_gbeth_clks[i];
+
+	err = devm_clk_bulk_get(dev, plat_dat->num_clks, plat_dat->clks);
+	if (err < 0)
+		return err;
+
+	plat_dat->clk_tx_i = stmmac_pltfr_find_clk(plat_dat, "tx");
+	if (!plat_dat->clk_tx_i)
+		return dev_err_probe(dev, -EINVAL,
+				     "error finding tx clock\n");
+
+	gbeth->rstc = devm_reset_control_get_exclusive(dev, NULL);
+	if (IS_ERR(gbeth->rstc))
+		return PTR_ERR(gbeth->rstc);
+
+	gbeth->dev = dev;
+	gbeth->plat_dat = plat_dat;
+	plat_dat->bsp_priv = gbeth;
+	plat_dat->set_clk_tx_rate = stmmac_set_clk_tx_rate;
+	plat_dat->init = renesas_gbeth_init;
+	plat_dat->exit = renesas_gbeth_exit;
+	plat_dat->flags |= STMMAC_FLAG_HWTSTAMP_CORRECT_LATENCY |
+			   STMMAC_FLAG_EN_TX_LPI_CLK_PHY_CAP |
+			   STMMAC_FLAG_SPH_DISABLE;
+
+	return devm_stmmac_pltfr_probe(pdev, plat_dat, &stmmac_res);
+}
+
+static const struct of_device_id renesas_gbeth_match[] = {
+	{ .compatible = "renesas,rzv2h-gbeth", },
+	{ /* Sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, renesas_gbeth_match);
+
+static struct platform_driver renesas_gbeth_driver = {
+	.probe  = renesas_gbeth_probe,
+	.driver = {
+		.name		= "renesas-gbeth",
+		.of_match_table	= renesas_gbeth_match,
+	},
+};
+module_platform_driver(renesas_gbeth_driver);
+
+MODULE_AUTHOR("Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>");
+MODULE_DESCRIPTION("Renesas GBETH DWMAC Specific Glue layer");
+MODULE_LICENSE("GPL");