Driver for the Maxim DS1WM, a 1-wire bus master ASIC core

Cc: Matt Reimer <mreimer@vpop.net>

[akpm@linux-foundation.org: kconfig update]
Signed-off-by: Matt Reimer <mreimer@vpop.net>
Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/w1/masters/Kconfig

@@ -35,5 +35,13 @@ config W1_MASTER_DS2482
 	  This driver can also be built as a module.  If so, the module
 	  will be called ds2482.
 
+config W1_MASTER_DS1WM
+	tristate "Maxim DS1WM 1-wire busmaster"
+	depends on W1 && ARM
+	help
+	  Say Y here to enable the DS1WM 1-wire driver, such as that
+	  in HP iPAQ devices like h5xxx, h2200, and ASIC3-based like
+	  hx4700.
+
 endmenu
 

drivers/w1/masters/Makefile

@@ -5,4 +5,4 @@
 obj-$(CONFIG_W1_MASTER_MATROX)		+= matrox_w1.o
 obj-$(CONFIG_W1_MASTER_DS2490)		+= ds2490.o
 obj-$(CONFIG_W1_MASTER_DS2482)		+= ds2482.o
-
+obj-$(CONFIG_W1_MASTER_DS1WM)		+= ds1wm.o

include/linux/ds1wm.h

+/* platform data for the DS1WM driver */
+
+struct ds1wm_platform_data {
+	int bus_shift;	    /* number of shifts needed to calculate the
+			     * offset between DS1WM registers;
+			     * e.g. on h5xxx and h2200 this is 2
+			     * (registers aligned to 4-byte boundaries),
+			     * while on hx4700 this is 1 */
+	void (*enable)(struct platform_device *pdev);
+	void (*disable)(struct platform_device *pdev);
+};