From 2f5ad7f0f3e16772bafa692ad42b5af4dea292f6 Mon Sep 17 00:00:00 2001 From: "mar.krzeminski" Date: Fri, 6 Jan 2017 18:19:00 +0100 Subject: [PATCH] mtd: spi-nor: Fix whole chip erasing for stacked chips. Currently it is possible to disable chip erase for spi-nor driver. Some modern stacked (multi die) flash chips do not support chip erase opcode at all but spi-nor framework needs to cope with them too. This commit extends existing functionality to allow disable chip erase for a single flash chip. Signed-off-by: Marcin Krzeminski Signed-off-by: Cyrille Pitchen --- drivers/mtd/spi-nor/spi-nor.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c index 561e46d..c29a351 100644 --- a/drivers/mtd/spi-nor/spi-nor.c +++ b/drivers/mtd/spi-nor/spi-nor.c @@ -85,6 +85,7 @@ struct flash_info { * Use dedicated 4byte address op codes * to support memory size above 128Mib. */ +#define NO_CHIP_ERASE BIT(12) /* Chip does not support chip erase */ }; #define JEDEC_MFR(info) ((info)->id[0]) @@ -1631,6 +1632,8 @@ int spi_nor_scan(struct spi_nor *nor, const char *name, enum read_mode mode) nor->flags |= SNOR_F_USE_FSR; if (info->flags & SPI_NOR_HAS_TB) nor->flags |= SNOR_F_HAS_SR_TB; + if (info->flags & NO_CHIP_ERASE) + nor->flags |= SNOR_F_NO_OP_CHIP_ERASE; #ifdef CONFIG_MTD_SPI_NOR_USE_4K_SECTORS /* prefer "small sector" erase if possible */ -- 2.7.4