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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Philipp Zabel , Geert Uytterhoeven , "Russell King (Oracle)" , Giuseppe Cavallaro , Jose Abreu , Alexandre Torgue Cc: netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Prabhakar , Biju Das , Fabrizio Castro , Lad Prabhakar Subject: [PATCH 3/3] net: stmmac: Add DWMAC glue layer for Renesas GBETH Date: Sun, 2 Mar 2025 18:18:08 +0000 Message-ID: <20250302181808.728734-4-prabhakar.mahadev-lad.rj@bp.renesas.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250302181808.728734-1-prabhakar.mahadev-lad.rj@bp.renesas.com> References: <20250302181808.728734-1-prabhakar.mahadev-lad.rj@bp.renesas.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: kuba@kernel.org From: Lad Prabhakar Renesas RZ/V2H(P) SoC is equipped with Synopsys DesignWare Ethernet Quality-of-Service IP block version 5.20. This commit adds DWMAC glue layer for the Renesas GBETH found on the RZ/V2H(P) SoC. Signed-off-by: Lad Prabhakar --- drivers/net/ethernet/stmicro/stmmac/Kconfig | 11 ++ drivers/net/ethernet/stmicro/stmmac/Makefile | 1 + .../stmicro/stmmac/dwmac-renesas-gbeth.c | 118 ++++++++++++++++++ 3 files changed, 130 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 4cc85a36a1ab..6e52a27f01b5 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 b26f0e79c2b3..91bf57fa3de4 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..f4488dc51b27 --- /dev/null +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-renesas-gbeth.c @@ -0,0 +1,118 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * dwmac-renesas-gbeth.c - DWMAC Specific Glue layer for Renesas GBETH + * + * Copyright (C) 2025 Renesas Electronics Corporation + */ + +#include +#include +#include +#include +#include + +#include "dwmac4.h" +#include "stmmac_platform.h" + +struct renesas_gbeth { + struct device *dev; + void __iomem *regs; + unsigned int num_clks; + struct clk_bulk_data *clks; +}; + +static const char *const renesas_gbeth_clks[] __initconst = { + "rx", "rx-180", "tx-180", +}; + +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; + struct reset_control *rstc; + 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->clk_tx_i = devm_clk_get_enabled(dev, "tx"); + if (IS_ERR(plat_dat->clk_tx_i)) + return dev_err_probe(dev, PTR_ERR(plat_dat->clk_tx_i), + "error getting tx clock\n"); + + gbeth->num_clks = ARRAY_SIZE(renesas_gbeth_clks); + gbeth->clks = devm_kcalloc(dev, gbeth->num_clks, + sizeof(*gbeth->clks), GFP_KERNEL); + if (!gbeth->clks) + return -ENOMEM; + + for (i = 0; i < gbeth->num_clks; i++) + gbeth->clks[i].id = renesas_gbeth_clks[i]; + + err = devm_clk_bulk_get(dev, gbeth->num_clks, gbeth->clks); + if (err < 0) + return err; + + err = clk_bulk_prepare_enable(gbeth->num_clks, gbeth->clks); + if (err) + return err; + + rstc = devm_reset_control_get_exclusive_deasserted(dev, NULL); + if (IS_ERR(rstc)) + return PTR_ERR(rstc); + + gbeth->dev = dev; + gbeth->regs = stmmac_res.addr; + plat_dat->bsp_priv = gbeth; + plat_dat->set_clk_tx_rate = stmmac_set_clk_tx_rate; + plat_dat->flags |= STMMAC_FLAG_HWTSTAMP_CORRECT_LATENCY | + STMMAC_FLAG_EN_TX_LPI_CLOCKGATING | + STMMAC_FLAG_RX_CLK_RUNS_IN_LPI | + STMMAC_FLAG_SPH_DISABLE; + + return stmmac_dvr_probe(dev, plat_dat, &stmmac_res); +} + +static void renesas_gbeth_remove(struct platform_device *pdev) +{ + struct renesas_gbeth *gbeth = get_stmmac_bsp_priv(&pdev->dev); + + stmmac_dvr_remove(&pdev->dev); + + clk_bulk_disable_unprepare(gbeth->num_clks, gbeth->clks); +} + +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, + .remove = renesas_gbeth_remove, + .driver = { + .name = "renesas-gbeth", + .pm = &stmmac_pltfr_pm_ops, + .of_match_table = renesas_gbeth_match, + }, +}; +module_platform_driver(renesas_gbeth_driver); + +MODULE_AUTHOR("Lad Prabhakar "); +MODULE_DESCRIPTION("Renesas GBETH DWMAC Specific Glue layer"); +MODULE_LICENSE("GPL");