[PATCH v2 1/4] net: ti: am65-cpsw-nuss: Use approved property to get efuse address

[Roger Quadros]

The approved DT property for MAC efuse (ROM) address is
"ti,syscon-efuse".

Use that and drop custom property "mac_efuse".

Signed-off-by: Roger Quadros <rog...@kernel.org>
---
 drivers/net/ti/Kconfig          |  1 +
 drivers/net/ti/am65-cpsw-nuss.c | 52 +++++++++++++++++++++++----------
 2 files changed, 37 insertions(+), 16 deletions(-)

diff --git a/drivers/net/ti/Kconfig b/drivers/net/ti/Kconfig
index e13dbc9401..d9f1c019a8 100644
--- a/drivers/net/ti/Kconfig
+++ b/drivers/net/ti/Kconfig
@@ -43,6 +43,7 @@ config TI_AM65_CPSW_NUSS
        depends on ARCH_K3
        imply MISC_INIT_R
        imply MISC
+       imply SYSCON
        select PHYLIB
        help
          This driver supports TI K3 MCU CPSW Nuss Ethernet controller
diff --git a/drivers/net/ti/am65-cpsw-nuss.c b/drivers/net/ti/am65-cpsw-nuss.c
index 523a4c9f91..ee46676ec8 100644
--- a/drivers/net/ti/am65-cpsw-nuss.c
+++ b/drivers/net/ti/am65-cpsw-nuss.c
@@ -21,7 +21,9 @@
 #include <net.h>
 #include <phy.h>
 #include <power-domain.h>
+#include <regmap.h>
 #include <soc.h>
+#include <syscon.h>
 #include <linux/bitops.h>
 #include <linux/soc/ti/ti-udma.h>
 
@@ -101,7 +103,6 @@ struct am65_cpsw_common {
        fdt_addr_t              mdio_base;
        fdt_addr_t              ale_base;
        fdt_addr_t              gmii_sel;
-       fdt_addr_t              mac_efuse;
 
        struct clk              fclk;
        struct power_domain     pwrdmn;
@@ -516,24 +517,45 @@ static void am65_cpsw_stop(struct udevice *dev)
        common->started = false;
 }
 
+static int am65_cpsw_am654_get_efuse_macid(struct udevice *dev,
+                                          int slave, u8 *mac_addr)
+{
+       u32 mac_lo, mac_hi, offset;
+       struct regmap *syscon;
+       int ret;
+
+       syscon = syscon_regmap_lookup_by_phandle(dev, "ti,syscon-efuse");
+       if (IS_ERR(syscon)) {
+               if (PTR_ERR(syscon) == -ENODEV)
+                       return 0;
+               return PTR_ERR(syscon);
+       }
+
+       ret = dev_read_u32_index(dev, "ti,syscon-efuse", 1, &offset);
+       if (ret)
+               return ret;
+
+       regmap_read(syscon, offset, &mac_lo);
+       regmap_read(syscon, offset + 4, &mac_hi);
+
+       mac_addr[0] = (mac_hi >> 8) & 0xff;
+       mac_addr[1] = mac_hi & 0xff;
+       mac_addr[2] = (mac_lo >> 24) & 0xff;
+       mac_addr[3] = (mac_lo >> 16) & 0xff;
+       mac_addr[4] = (mac_lo >> 8) & 0xff;
+       mac_addr[5] = mac_lo & 0xff;
+
+       return 0;
+}
+
 static int am65_cpsw_read_rom_hwaddr(struct udevice *dev)
 {
        struct am65_cpsw_priv *priv = dev_get_priv(dev);
-       struct am65_cpsw_common *common = priv->cpsw_common;
        struct eth_pdata *pdata = dev_get_plat(dev);
-       u32 mac_hi, mac_lo;
-
-       if (common->mac_efuse == FDT_ADDR_T_NONE)
-               return -1;
 
-       mac_lo = readl(common->mac_efuse);
-       mac_hi = readl(common->mac_efuse + 4);
-       pdata->enetaddr[0] = (mac_hi >> 8) & 0xff;
-       pdata->enetaddr[1] = mac_hi & 0xff;
-       pdata->enetaddr[2] = (mac_lo >> 24) & 0xff;
-       pdata->enetaddr[3] = (mac_lo >> 16) & 0xff;
-       pdata->enetaddr[4] = (mac_lo >> 8) & 0xff;
-       pdata->enetaddr[5] = mac_lo & 0xff;
+       am65_cpsw_am654_get_efuse_macid(dev,
+                                       priv->port_id,
+                                       pdata->enetaddr);
 
        return 0;
 }
@@ -710,8 +732,6 @@ static int am65_cpsw_probe_nuss(struct udevice *dev)
        cpsw_common->ss_base = dev_read_addr(dev);
        if (cpsw_common->ss_base == FDT_ADDR_T_NONE)
                return -EINVAL;
-       cpsw_common->mac_efuse = devfdt_get_addr_name(dev, "mac_efuse");
-       /* no err check - optional */
 
        ret = power_domain_get_by_index(dev, &cpsw_common->pwrdmn, 0);
        if (ret) {
-- 
2.34.1