[MTD] LPDDR extended physmap driver to support LPDDR flash

Physmap is a generic map driver for different platforms and flash types.
We added support of LPDDR to physmap.
All changes here are related to introduction of new pfow_base parameter.
This parameter is valid in case of LPDDR chips only.

Signed-off-by: Alexey Korolev <akorolev@infradead.org>
Acked-by: Jared Hulbert <jaredeh@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

drivers/mtd/maps/Kconfig

@@ -10,8 +10,8 @@ config MTD_COMPLEX_MAPPINGS
 	  paged mappings of flash chips.
 
 config MTD_PHYSMAP
-	tristate "CFI Flash device in physical memory map"
-	depends on MTD_CFI || MTD_JEDECPROBE || MTD_ROM
+	tristate "Flash device in physical memory map"
+	depends on MTD_CFI || MTD_JEDECPROBE || MTD_ROM || MTD_LPDDR
 	help
 	  This provides a 'mapping' driver which allows the NOR Flash and
 	  ROM driver code to communicate with chips which are mapped

drivers/mtd/maps/physmap.c

@@ -68,7 +68,12 @@ static int physmap_flash_remove(struct platform_device *dev)
 	return 0;
 }
 
-static const char *rom_probe_types[] = { "cfi_probe", "jedec_probe", "map_rom", NULL };
+static const char *rom_probe_types[] = {
+					"cfi_probe",
+					"jedec_probe",
+					"qinfo_probe",
+					"map_rom",
+					NULL };
 #ifdef CONFIG_MTD_PARTITIONS
 static const char *part_probe_types[] = { "cmdlinepart", "RedBoot", NULL };
 #endif
@@ -117,6 +122,7 @@ static int physmap_flash_probe(struct platform_device *dev)
 		info->map[i].size = dev->resource[i].end - dev->resource[i].start + 1;
 		info->map[i].bankwidth = physmap_data->width;
 		info->map[i].set_vpp = physmap_data->set_vpp;
+		info->map[i].pfow_base = physmap_data->pfow_base;
 
 		info->map[i].virt = devm_ioremap(&dev->dev, info->map[i].phys,
 						 info->map[i].size);

include/linux/mtd/physmap.h

@@ -24,6 +24,7 @@ struct physmap_flash_data {
 	unsigned int		width;
 	void			(*set_vpp)(struct map_info *, int);
 	unsigned int		nr_parts;
+	unsigned int		pfow_base;
 	struct mtd_partition	*parts;
 };