From b5aec1424d191c51f694ba85d5577e7a635363d9 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Mon, 11 Mar 2013 06:08:02 +0000 Subject: sf: Add spi_flash_alloc() to create a new SPI flash struct At present it is difficult to extend the SPI flash structure since all devices allocate it themselves, and few of them zero all fields. Add a new function spi_flash_alloc() which can be used by SPI devices to perform this allocation, and thus ensure that all devices can better cope with SPI structure changes. Signed-off-by: Simon Glass --- include/spi_flash.h | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) (limited to 'include') diff --git a/include/spi_flash.h b/include/spi_flash.h index 9da90624f2..030d49cb71 100644 --- a/include/spi_flash.h +++ b/include/spi_flash.h @@ -47,6 +47,44 @@ struct spi_flash { size_t len); }; +/** + * spi_flash_do_alloc - Allocate a new spi flash structure + * + * The structure is allocated and cleared with default values for + * read, write and erase, which the caller can modify. The caller must set + * up size, page_size and sector_size. + * + * Use the helper macro spi_flash_alloc() to call this. + * + * @offset: Offset of struct spi_slave within slave structure + * @size: Size of slave structure + * @spi: SPI slave + * @name: Name of SPI flash device + */ +void *spi_flash_do_alloc(int offset, int size, struct spi_slave *spi, + const char *name); + +/** + * spi_flash_alloc - Allocate a new SPI flash structure + * + * @_struct: Name of structure to allocate (e.g. struct ramtron_spi_fram). This + * structure must contain a member 'struct spi_flash *flash'. + * @spi: SPI slave + * @name: Name of SPI flash device + */ +#define spi_flash_alloc(_struct, spi, name) \ + spi_flash_do_alloc(offsetof(_struct, flash), sizeof(_struct), \ + spi, name) + +/** + * spi_flash_alloc_base - Allocate a new SPI flash structure with no private data + * + * @spi: SPI slave + * @name: Name of SPI flash device + */ +#define spi_flash_alloc_base(spi, name) \ + spi_flash_do_alloc(0, sizeof(struct spi_flash), spi, name) + struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs, unsigned int max_hz, unsigned int spi_mode); void spi_flash_free(struct spi_flash *flash); -- cgit v1.2.1