[v4,15/21] net: designware: socfpga: MAC driver access System Manager via 'altera_sysmgr'

diff --git a/drivers/net/dwmac_socfpga.c b/drivers/net/dwmac_socfpga.c
index e93561d..c825cbf 100644
--- a/drivers/net/dwmac_socfpga.c
+++ b/drivers/net/dwmac_socfpga.c
@@ -9,6 +9,7 @@ 
 #include <asm/io.h>
 #include <dm.h>
 #include <clk.h>
+#include <misc.h>
 #include <phy.h>
 #include <regmap.h>
 #include <reset.h>
@@ -21,16 +22,14 @@ 
 
 struct dwmac_socfpga_platdata {
 	struct dw_eth_pdata	dw_eth_pdata;
-	void			*phy_intf;
+	fdt_addr_t		phy_reg_offset;
 	u32			reg_shift;
 };
 
 static int dwmac_socfpga_ofdata_to_platdata(struct udevice *dev)
 {
 	struct dwmac_socfpga_platdata *pdata = dev_get_platdata(dev);
-	struct regmap *regmap;
 	struct ofnode_phandle_args args;
-	void *range;
 	int ret;
 
 	ret = dev_read_phandle_with_args(dev, "altr,sysmgr-syscon", NULL,
@@ -45,20 +44,7 @@  static int dwmac_socfpga_ofdata_to_platdata(struct udevice *dev)
 		return -EINVAL;
 	}
 
-	regmap = syscon_node_to_regmap(args.node);
-	if (IS_ERR(regmap)) {
-		ret = PTR_ERR(regmap);
-		dev_err(dev, "Failed to get regmap: %d\n", ret);
-		return ret;
-	}
-
-	range = regmap_get_range(regmap, 0);
-	if (!range) {
-		dev_err(dev, "Failed to get regmap range\n");
-		return -ENOMEM;
-	}
-
-	pdata->phy_intf = range + args.args[0];
+	pdata->phy_reg_offset = args.args[0];
 	pdata->reg_shift = args.args[1];
 
 	return designware_eth_ofdata_to_platdata(dev);
@@ -69,10 +55,20 @@  static int dwmac_socfpga_probe(struct udevice *dev)
 	struct dwmac_socfpga_platdata *pdata = dev_get_platdata(dev);
 	struct eth_pdata *edata = &pdata->dw_eth_pdata.eth_pdata;
 	struct reset_ctl_bulk reset_bulk;
+	struct udevice *sysmgr;
 	int ret;
 	u32 modereg;
 	u32 modemask;
 
+	ret = uclass_get_device_by_phandle(UCLASS_MISC, dev,
+					   "altr,sysmgr-syscon", &sysmgr);
+
+	if (ret == -ENOENT) {
+		debug("%s: Could not find 'altr,sysmgr-syscon' phandle\n",
+		      dev->name);
+		return -EINVAL;
+	}
+
 	switch (edata->phy_interface) {
 	case PHY_INTERFACE_MODE_MII:
 	case PHY_INTERFACE_MODE_GMII:
@@ -97,9 +93,10 @@  static int dwmac_socfpga_probe(struct udevice *dev)
 
 	reset_assert_bulk(&reset_bulk);
 
-	modemask = SYSMGR_EMACGRP_CTRL_PHYSEL_MASK << pdata->reg_shift;
-	clrsetbits_le32(pdata->phy_intf, modemask,
-			modereg << pdata->reg_shift);
+	misc_read(sysmgr, pdata->phy_reg_offset, &modemask, sizeof(modemask));
+	modemask &= ~(SYSMGR_EMACGRP_CTRL_PHYSEL_MASK << pdata->reg_shift);
+	modemask |= (modereg << pdata->reg_shift);
+	misc_write(sysmgr, pdata->phy_reg_offset, &modemask, sizeof(modemask));
 
 	reset_release_bulk(&reset_bulk);