phy: renesas: Add Renesas Ethernet SERDES driver for R-Car S4-8
Add Renesas Ethernet SERDES driver for R-Car S4-8 (r8a779f0).
The datasheet describes initialization procedure without any information
about registers' name/bits. So, this is all black magic to initialize
the hardware. Especially, all channels should be initialized at once.
This driver is imported and adjusted from Linux 6.3-rc1 commit:
50133cd3e8dd1 ("phy: renesas: r8a779f0-eth-serdes: Remove retry code in .init()")
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
diff --git a/drivers/phy/renesas/Makefile b/drivers/phy/renesas/Makefile
new file mode 100644
index 0000000..fd6b8d9
--- /dev/null
+++ b/drivers/phy/renesas/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_PHY_R8A779F0_ETHERNET_SERDES) += r8a779f0-ether-serdes.o