From 1d6432fe10c3e724e307dd7137cd293a0edcae80 Mon Sep 17 00:00:00 2001 From: David Brownell Date: Sun, 8 Jan 2006 13:34:22 -0800 Subject: [PATCH] spi: mtd dataflash driver This is a conversion of the AT91rm9200 DataFlash MTD driver to use the lightweight SPI framework, and no longer be AT91-specific. It compiles down to less than 3KBytes on ARM. The driver allows board-specific init code to provide platform_data with the relevant MTD partitioning information, and hotplugs. This version has been lightly tested. Its parent at91_dataflash driver has been pretty well banged on, although kernel.org JFFS2 dataflash support was acting broken the last time I tried it. Signed-off-by: David Brownell Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman --- include/linux/spi/flash.h | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) create mode 100644 include/linux/spi/flash.h (limited to 'include/linux/spi/flash.h') diff --git a/include/linux/spi/flash.h b/include/linux/spi/flash.h new file mode 100644 index 000000000000..2ce6558bf3f8 --- /dev/null +++ b/include/linux/spi/flash.h @@ -0,0 +1,27 @@ +#ifndef LINUX_SPI_FLASH_H +#define LINUX_SPI_FLASH_H + +struct mtd_partition; + +/** + * struct flash_platform_data: board-specific flash data + * @name: optional flash device name (eg, as used with mtdparts=) + * @parts: optional array of mtd_partitions for static partitioning + * @nr_parts: number of mtd_partitions for static partitoning + * + * Board init code (in arch/.../mach-xxx/board-yyy.c files) can + * provide information about SPI flash parts (such as DataFlash) to + * help set up the device and its appropriate default partitioning. + * + * Note that for DataFlash, sizes for pages, blocks, and sectors are + * rarely powers of two; and partitions should be sector-aligned. + */ +struct flash_platform_data { + char *name; + struct mtd_partition *parts; + unsigned int nr_parts; + + /* we'll likely add more ... use JEDEC IDs, etc */ +}; + +#endif -- cgit v1.2.2 From 2f9f762879015d738a5ec2ac8a16be94b3a4a06d Mon Sep 17 00:00:00 2001 From: Mike Lavender Date: Sun, 8 Jan 2006 13:34:27 -0800 Subject: [PATCH] spi: M25 series SPI flash This was originally a driver for the ST M25P80 SPI flash. It's been updated slightly to handle other M25P series chips. For many of these chips, the specific type could be probed, but for now this just requires static setup with flash_platform_data that lists the chip type (size, format) and any default partitioning to use. Signed-off-by: David Brownell Cc: Mike Lavender Cc: David Brownell Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman --- include/linux/spi/flash.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'include/linux/spi/flash.h') diff --git a/include/linux/spi/flash.h b/include/linux/spi/flash.h index 2ce6558bf3f8..3f22932e67a4 100644 --- a/include/linux/spi/flash.h +++ b/include/linux/spi/flash.h @@ -8,6 +8,8 @@ struct mtd_partition; * @name: optional flash device name (eg, as used with mtdparts=) * @parts: optional array of mtd_partitions for static partitioning * @nr_parts: number of mtd_partitions for static partitoning + * @type: optional flash device type (e.g. m25p80 vs m25p64), for use + * with chips that can't be queried for JEDEC or other IDs * * Board init code (in arch/.../mach-xxx/board-yyy.c files) can * provide information about SPI flash parts (such as DataFlash) to @@ -21,6 +23,8 @@ struct flash_platform_data { struct mtd_partition *parts; unsigned int nr_parts; + char *type; + /* we'll likely add more ... use JEDEC IDs, etc */ }; -- cgit v1.2.2