These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / drivers / net / ethernet / stmicro / stmmac / dwmac-lpc18xx.c

diff --git a/kernel/drivers/net/ethernet/stmicro/stmmac/dwmac-lpc18xx.c b/kernel/drivers/net/ethernet/stmicro/stmmac/dwmac-lpc18xx.c
new file mode 100644 (file)
index 0000000..78e9d18
--- /dev/null
+++ b/kernel/drivers/net/ethernet/stmicro/stmmac/dwmac-lpc18xx.c
@@ -0,0 +1,86 @@
+/*
+ * DWMAC glue for NXP LPC18xx/LPC43xx Ethernet
+ *
+ * Copyright (C) 2015 Joachim Eastwood <manabian@gmail.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_net.h>
+#include <linux/phy.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/stmmac.h>
+
+#include "stmmac_platform.h"
+
+/* Register defines for CREG syscon */
+#define LPC18XX_CREG_CREG6                     0x12c
+# define LPC18XX_CREG_CREG6_ETHMODE_MASK       0x7
+# define LPC18XX_CREG_CREG6_ETHMODE_MII                0x0
+# define LPC18XX_CREG_CREG6_ETHMODE_RMII       0x4
+
+static int lpc18xx_dwmac_probe(struct platform_device *pdev)
+{
+       struct plat_stmmacenet_data *plat_dat;
+       struct stmmac_resources stmmac_res;
+       struct regmap *reg;
+       u8 ethmode;
+       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);
+
+       plat_dat->has_gmac = true;
+
+       reg = syscon_regmap_lookup_by_compatible("nxp,lpc1850-creg");
+       if (IS_ERR(reg)) {
+               dev_err(&pdev->dev, "syscon lookup failed\n");
+               return PTR_ERR(reg);
+       }
+
+       if (plat_dat->interface == PHY_INTERFACE_MODE_MII) {
+               ethmode = LPC18XX_CREG_CREG6_ETHMODE_MII;
+       } else if (plat_dat->interface == PHY_INTERFACE_MODE_RMII) {
+               ethmode = LPC18XX_CREG_CREG6_ETHMODE_RMII;
+       } else {
+               dev_err(&pdev->dev, "Only MII and RMII mode supported\n");
+               return -EINVAL;
+       }
+
+       regmap_update_bits(reg, LPC18XX_CREG_CREG6,
+                          LPC18XX_CREG_CREG6_ETHMODE_MASK, ethmode);
+
+       return stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
+}
+
+static const struct of_device_id lpc18xx_dwmac_match[] = {
+       { .compatible = "nxp,lpc1850-dwmac" },
+       { }
+};
+MODULE_DEVICE_TABLE(of, lpc18xx_dwmac_match);
+
+static struct platform_driver lpc18xx_dwmac_driver = {
+       .probe  = lpc18xx_dwmac_probe,
+       .remove = stmmac_pltfr_remove,
+       .driver = {
+               .name           = "lpc18xx-dwmac",
+               .pm             = &stmmac_pltfr_pm_ops,
+               .of_match_table = lpc18xx_dwmac_match,
+       },
+};
+module_platform_driver(lpc18xx_dwmac_driver);
+
+MODULE_AUTHOR("Joachim Eastwood <manabian@gmail.com>");
+MODULE_DESCRIPTION("DWMAC glue for LPC18xx/43xx Ethernet");
+MODULE_LICENSE("GPL v2");