w1: Add AXI 1-wire host driver for AMD programmable logic IP core

Add a host driver to support the AMD 1-Wire programmable logic IP block.
This block guarantees protocol timing for driving off-board devices such
as thermal sensors, proms, etc.

Add file to MAINTAINERS
Co-developed-by: Thomas Delev <thomas.delev@amd.com>
Signed-off-by: Thomas Delev <thomas.delev@amd.com>
Signed-off-by: Kris Chaplin <kris.chaplin@amd.com>
Link: https://lore.kernel.org/r/20231107180814.615933-3-kris.chaplin@amd.comSigned-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

MAINTAINERS

@@ -899,6 +899,7 @@ R:	Thomas Delev <thomas.delev@amd.com>
 R:	Michal Simek <michal.simek@amd.com>
 S:	Maintained
 F:	Documentation/devicetree/bindings/w1/amd,axi-1wire-host.yaml
+F:	drivers/w1/masters/amd_axi_w1.c
 
 AMD CDX BUS DRIVER
 M:	Nipun Gupta <nipun.gupta@amd.com>

drivers/w1/masters/Kconfig

@@ -5,6 +5,17 @@
 
 menu "1-wire Bus Masters"
 
+config W1_MASTER_AMD_AXI
+	tristate "AMD AXI 1-wire bus host"
+	help
+	  Say Y here is you want to support the AMD AXI 1-wire IP core.
+	  This driver makes use of the programmable logic IP to perform
+	  correctly timed 1 wire transactions without relying on GPIO timing
+	  through the kernel.
+
+	  This driver can also be built as a module.  If so, the module will be
+	  called amd_w1_axi.
+
 config W1_MASTER_MATROX
 	tristate "Matrox G400 transport layer for 1-wire"
 	depends on PCI

drivers/w1/masters/Makefile

@@ -3,6 +3,7 @@
 # Makefile for 1-wire bus master drivers.
 #
 
+obj-$(CONFIG_W1_MASTER_AMD_AXI)		+= amd_axi_w1.o
 obj-$(CONFIG_W1_MASTER_MATROX)		+= matrox_w1.o
 obj-$(CONFIG_W1_MASTER_DS2490)		+= ds2490.o
 obj-$(CONFIG_W1_MASTER_DS2482)		+= ds2482.o