mtd: physmap_of: allow to specify the mtd name for retro compatiblity
Subsystems (2)
PATCH 1/1 mtd: physmap_of: allow to specify the mtd name for retro compatiblity
linux,mtd-name allow to specify the mtd name for retro capability with physmap-flash drivers as boot loader pass the mtd partition via the old device name physmap-flash.
--- Documentation/devicetree/bindings/mtd/mtd-physmap.txt | 3 +++ drivers/mtd/maps/physmap_of.c | 5 ++++- 2 files changed, 7 insertions(+), 1 deletion(-)
Documentation/devicetree/bindings/mtd/mtd-physmap.txt +3 -0
@@ -23,6 +23,9 @@ file systems on embedded devices. unaligned accesses as implemented in the JFFS2 code via memcpy(). By defining "no-unaligned-direct-access", the flash will not be exposed directly to the MTD users (e.g. JFFS2) any more. + - linux,mtd-name: allow to specify the mtd name for retro capability with + physmap-flash drivers as boot loader pass the mtd partition via the old + device name physmap-flash. For JEDEC compatible devices, the following additional properties are defined:
drivers/mtd/maps/physmap_of.c +4 -1
@@ -170,6 +170,7 @@ static int __devinit of_flash_probe(struct platform_device *dev)resource_size_t res_size;struct mtd_part_parser_data ppdata;bool map_indirect; +const char *mtd_name; match =of_match_device (of_flash_match, &dev->dev);if (!match)
@@ -178,6 +179,8 @@ static int __devinit of_flash_probe(struct platform_device *dev) reg_tuple_size = (of_n_addr_cells (dp) +of_n_size_cells (dp)) *sizeof (u32); +of_property_read_string (dp,"linux,mtd-name" , &mtd_name); +/* * Get number of "reg" tuples. Scan for MTD devices on area's * described by each "reg" region. This makes it possible (including
@@ -234,7 +237,7 @@ static int __devinit of_flash_probe(struct platform_device *dev) goto err_out; } - info->list[i].map.name =dev_name (&dev->dev); + info->list[i].map.name = mtd_name ? mtd_name :dev_name (&dev->dev); info->list[i].map.phys = res.start; info->list[i].map.size = res_size; info->list[i].map.bankwidth =be32_to_cpup (width);
Signature · 1 line
1.7.10.4
PATCH 1/1 mtd: physmap_of: allow to specify the mtd name for retro compatiblity
Quoted 3 lines · Jean-Christophe PLAGNIOL-VILLARD
linux,mtd-name allow to specify the mtd name for retro capability with physmap-flash drivers as boot loader pass the mtd partition via the old device name physmap-flash.
Ummm. I don't follow. Could you explain more about how this change will be used?
Thanks,
g.
Quoted 59 lines
Signed-off-by Jean-Christophe PLAGNIOL-VILLARD <[email protected]>--- Documentation/devicetree/bindings/mtd/mtd-physmap.txt | 3 +++ drivers/mtd/maps/physmap_of.c | 5 ++++- 2 files changed, 7 insertions(+), 1 deletion(-)Documentation/devicetree/bindings/mtd/mtd-physmap.txt +3
-0@@ -23,6 +23,9 @@ file systems on embedded devices. unaligned accesses as implemented in the JFFS2 code via memcpy(). By defining "no-unaligned-direct-access", the flash will not be exposed directly to the MTD users (e.g. JFFS2) any more. + - linux,mtd-name: allow to specify the mtd name for retro capability with + physmap-flash drivers as boot loader pass the mtd partition via the old + device name physmap-flash. For JEDEC compatible devices, the following additional properties are defined:drivers/mtd/maps/physmap_of.c +4
-1@@ -170,6 +170,7 @@ static int __devinit of_flash_probe(struct platform_device *dev)resource_size_t res_size;struct mtd_part_parser_data ppdata;bool map_indirect; +const char *mtd_name; match =of_match_device (of_flash_match, &dev->dev);if (!match)@@ -178,6 +179,8 @@ static int __devinit of_flash_probe(struct platform_device *dev) reg_tuple_size = (of_n_addr_cells (dp) +of_n_size_cells (dp)) *sizeof (u32); +of_property_read_string (dp,"linux,mtd-name" , &mtd_name); +/* * Get number of "reg" tuples. Scan for MTD devices on area's * described by each "reg" region. This makes it possible (including @@ -234,7 +237,7 @@ static int __devinit of_flash_probe(struct platform_device *dev) goto err_out; } - info->list[i].map.name =dev_name (&dev->dev); + info->list[i].map.name = mtd_name ? mtd_name :dev_name (&dev->dev); info->list[i].map.phys = res.start; info->list[i].map.size = res_size; info->list[i].map.bankwidth =be32_to_cpup (width);Signature · 7 lines
1.7.10.4 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel at lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
Signature · 2 lines
Grant Likely, B.Sc, P.Eng. Secret Lab Technologies, Ltd.
PATCH 1/1 mtd: physmap_of: allow to specify the mtd name for retro compatiblity
Quoted 7 lines · Grant Likely
Quoted 3 lines · Jean-Christophe PLAGNIOL-VILLARD
linux,mtd-name allow to specify the mtd name for retro capability with physmap-flash drivers as boot loader pass the mtd partition via the old device name physmap-flash.
Ummm. I don't follow. Could you explain more about how this change will be used?
the bootloader pass the nor flash (aka physmap) partitions via cmdline
when switching to DT the mtd name change so the kernel does not found the partition table anymore as the mtd name is now the node name
and no I can not change the bootloader (product on the market)
Best Regards,
J.