Add support for Renesas RZ/N1 GMAC. This support uses a custom PCS (MIIC)
which is handle by parsing the pcs-handle device tree property.
Signed-off-by: Clément Léger <clement.leger@xxxxxxxxxxx>
---
drivers/net/ethernet/stmicro/stmmac/Kconfig | 11 ++
drivers/net/ethernet/stmicro/stmmac/Makefile | 1 +
.../net/ethernet/stmicro/stmmac/dwmac-rzn1.c | 120 ++++++++++++++++++
3 files changed, 132 insertions(+)
create mode 100644 drivers/net/ethernet/stmicro/stmmac/dwmac-rzn1.c
diff --git a/drivers/net/ethernet/stmicro/stmmac/Kconfig b/drivers/net/ethernet/stmicro/stmmac/Kconfig
index f77511fe4e87..be5429b7e192 100644
--- a/drivers/net/ethernet/stmicro/stmmac/Kconfig
+++ b/drivers/net/ethernet/stmicro/stmmac/Kconfig
@@ -153,6 +153,17 @@ config DWMAC_ROCKCHIP
This selects the Rockchip RK3288 SoC glue layer support for
the stmmac device driver.
+config DWMAC_RZN1
+ tristate "Renesas RZ/N1 dwmac support"
+ default ARCH_RZN1
+ depends on OF && (ARCH_RZN1 || COMPILE_TEST)
+ select PCS_RZN1_MIIC
+ help
+ Support for Ethernet controller on Renesas RZ/N1 SoC family.
+
+ This selects the Renesas RZ/N1 SoC glue layer support for
+ the stmmac device driver.
+
config DWMAC_SOCFPGA
tristate "SOCFPGA dwmac support"
default ARCH_INTEL_SOCFPGA
diff --git a/drivers/net/ethernet/stmicro/stmmac/Makefile b/drivers/net/ethernet/stmicro/stmmac/Makefile
index 057e4bab5c08..53a0f74c1cb5 100644
--- a/drivers/net/ethernet/stmicro/stmmac/Makefile
+++ b/drivers/net/ethernet/stmicro/stmmac/Makefile
@@ -22,6 +22,7 @@ obj-$(CONFIG_DWMAC_MESON) += dwmac-meson.o dwmac-meson8b.o
obj-$(CONFIG_DWMAC_OXNAS) += dwmac-oxnas.o
obj-$(CONFIG_DWMAC_QCOM_ETHQOS) += dwmac-qcom-ethqos.o
obj-$(CONFIG_DWMAC_ROCKCHIP) += dwmac-rk.o
+obj-$(CONFIG_DWMAC_RZN1) += dwmac-rzn1.o
obj-$(CONFIG_DWMAC_SOCFPGA) += dwmac-altr-socfpga.o
obj-$(CONFIG_DWMAC_STI) += dwmac-sti.o
obj-$(CONFIG_DWMAC_STM32) += dwmac-stm32.o
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-rzn1.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-rzn1.c
new file mode 100644
index 000000000000..82118d8cb50e
--- /dev/null
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-rzn1.c
@@ -0,0 +1,120 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2022 Schneider-Electric
+ *
+ * Clément Léger <clement.leger@xxxxxxxxxxx>
+ */
+
+#include <linux/of.h>
+#include <linux/pcs-rzn1-miic.h>
+#include <linux/phylink.h>
+#include <linux/platform_device.h>
+
+#include "stmmac_platform.h"
+#include "stmmac.h"
+
+struct rzn1_dwmac {
+ struct phylink_pcs *pcs;
+};
+
+static int rzn1_dt_parse(struct device *dev, struct rzn1_dwmac *dwmac)
+{
+ struct device_node *np = dev->of_node;
+ struct device_node *pcs_node;
+ struct phylink_pcs *pcs;
+ int ret;
+
+ pcs_node = of_parse_phandle(np, "pcs-handle", 0);
+ if (!pcs_node)
+ return 0;
+
+ pcs = miic_create(dev, pcs_node);
+ if (IS_ERR(pcs))
+ return PTR_ERR(pcs);
+
+ ret = miic_early_setup(pcs, dev);
+ if (ret) {
+ miic_destroy(pcs);
+ return ret;
+ }
+
+ dwmac->pcs = pcs;
+
+ return 0;
+}
+
+static int rzn1_dwmac_probe(struct platform_device *pdev)
+{
+ struct plat_stmmacenet_data *plat_dat;
+ struct stmmac_resources stmmac_res;
+ struct device *dev = &pdev->dev;
+ struct rzn1_dwmac *dwmac;
+ int ret;
+
+ ret = stmmac_get_platform_resources(pdev, &stmmac_res);
+ if (ret)
+ return ret;
+
+ plat_dat = stmmac_probe_config_dt(pdev, stmmac_res.mac);
+ if (IS_ERR(plat_dat))
+ return PTR_ERR(plat_dat);
+
+ dwmac = devm_kzalloc(dev, sizeof(*dwmac), GFP_KERNEL);
+ if (!dwmac) {
+ ret = -ENOMEM;
+ goto err_remove_config_dt;
+ }
+
+ ret = rzn1_dt_parse(dev, dwmac);
+ if (ret)
+ goto err_remove_config_dt;
+
+ plat_dat->bsp_priv = dwmac;
+ plat_dat->pcs = dwmac->pcs;
+
+ ret = stmmac_dvr_probe(dev, plat_dat, &stmmac_res);
+ if (ret)
+ goto err_free_pcs;
+
+ return 0;
+
+err_free_pcs:
+ if (dwmac->pcs)
+ miic_destroy(dwmac->pcs);
+
+err_remove_config_dt:
+ stmmac_remove_config_dt(pdev, plat_dat);
+
+ return ret;
+}
+
+static int rzn1_dwmac_remove(struct platform_device *pdev)
+{
+ struct rzn1_dwmac *dwmac = get_stmmac_bsp_priv(&pdev->dev);
+ int ret = stmmac_dvr_remove(&pdev->dev);
+
+ if (dwmac->pcs)
+ miic_destroy(dwmac->pcs);
+
+ return ret;
+}
+
+static const struct of_device_id rzn1_dwmac_match[] = {
+ { .compatible = "renesas,rzn1-gmac" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, rzn1_dwmac_match);
+
+static struct platform_driver rzn1_dwmac_driver = {
+ .probe = rzn1_dwmac_probe,
+ .remove = rzn1_dwmac_remove,
+ .driver = {
+ .name = "rzn1-dwmac",
+ .of_match_table = rzn1_dwmac_match,
+ },
+};
+module_platform_driver(rzn1_dwmac_driver);
+
+MODULE_AUTHOR("Clément Léger <clement.leger@xxxxxxxxxxx>");
+MODULE_DESCRIPTION("Renesas RZN1 DWMAC specific glue layer");
+MODULE_LICENSE("GPL");
--
2.39.0
