Sfp support in SM

* NET:SFP:ALTERA: SFP support for SM IP

* NET:ETH:ALTERA: SFP support in DTS

* NET:SFP:ALTERA: bit position fix for page select

* NET:ETH:SFP defensive coding

* NET:ETH:Kconfig modified for specifying AXI memory based design

---------

Co-authored-by: Narayan, Preetam <[email protected]>

Author: preetam-narayan

arch/arm64/boot/dts/intel/socfpga_agilex5_eth_1p10g.dtsi

@@ -67,6 +67,13 @@
                         status = "okay";
                 };
 
+                sfp_eth0: sfp-eth0 {
+                        compatible = "altera,sfp-mem";
+                        reg-names = "sfp-mem-ctrl";
+                        reg = <0x44040000 0x00001000>;
+                        status = "okay";
+                };
+
 		msgdma_gts_0_eth: msgdma_gts_0_eth {
 			compatible = "altr,msgdma-gts-1.0";
 			#address-cells = <1>;
@@ -83,6 +90,9 @@
 			interrupts = <GIC_SPI 19 IRQ_TYPE_LEVEL_HIGH>, <GIC_SPI 20 IRQ_TYPE_LEVEL_HIGH>;
 			status = "okay";
 			qsfp-lane = <0x0>;
+			sfp-lane = <0x0>;
+			qsfp = <&qsfp_eth0>;
+			sfp = <&sfp_eth0>;
 			fec-type="no-fec";
 			phy-mode = "10gbase-r";
 			fec-cw-pos-rx = <0x0>;

drivers/net/phy/Kconfig

@@ -77,6 +77,21 @@ config SFP
 	depends on HWMON || HWMON=n
 	select MDIO_I2C
 
+config SFP_MEM_CORE
+        tristate "SFP Controller subsystem core code" if COMPILE_TEST
+        depends on HWMON || HWMON=n
+        help
+          The core code for the SFP Controller subsystem for Altera FPGAs used
+          by other interafce module drivers for access to the SFP controller
+          subsystem registers
+
+config SFP_MEM
+        tristate "AXI based Memory platform driver for SFP Controller subsystem in Altera FPGAs"
+        select SFP_MEM_CORE
+        help
+          Adds support for a SFP controller subsystem that shadows the SFP module's
+          memory pages in memory
+
 config QSFP_MEM_CORE
 	tristate "QSFP Controller subsystem core code" if COMPILE_TEST
 	depends on HWMON || HWMON=n
@@ -86,7 +101,7 @@ config QSFP_MEM_CORE
 	  subsystem registers
 
 config QSFP_MEM
-	tristate "Memory based platform driver for QSFP Controller subsystem in Altera FPGAs"
+	tristate "AXI based Memory platform driver for QSFP Controller subsystem in Altera FPGAs"
 	select QSFP_MEM_CORE
 	help
 	  Adds support for a QSFP controller subsystem that shadows the QSFP module's

drivers/net/phy/Makefile

@@ -41,6 +41,9 @@ obj-$(CONFIG_QSFP_MEM_CORE)     += qsfp-mem-core.o
 obj-$(CONFIG_QSFP_MEM_DFL)      += qsfp-mem-dfl.o
 obj-$(CONFIG_QSFP_MEM)          += qsfp-mem-platform.o
 
+obj-$(CONFIG_SFP_MEM_CORE)     += sfp-mem-core.o
+obj-$(CONFIG_SFP_MEM)          += sfp-mem-platform.o
+
 obj-$(CONFIG_ADIN_PHY)		+= adin.o
 obj-$(CONFIG_ADIN1100_PHY)	+= adin1100.o
 obj-$(CONFIG_AIR_EN8811H_PHY)   += air_en8811h.o