From 76a4707de5e18dc32d9cb4e990686140c5664a15 Mon Sep 17 00:00:00 2001 From: Brian Norris Date: Fri, 29 Jan 2016 11:25:35 -0800 Subject: [PATCH] mtd: spi-nor: add SPI_NOR_HAS_LOCK flag We can't determine this purely by manufacturer type (see commit 67b9bcd36906 ("mtd: spi-nor: fix Spansion regressions (aliased with Winbond)")), and it's not autodetectable by anything like SFDP. So make a new flag for it. Signed-off-by: Brian Norris Reviewed-by: Ezequiel Garcia Tested-by: Ezequiel Garcia --- drivers/mtd/spi-nor/spi-nor.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) --- a/drivers/mtd/spi-nor/spi-nor.c +++ b/drivers/mtd/spi-nor/spi-nor.c @@ -68,6 +68,7 @@ struct flash_info { #define SPI_NOR_DUAL_READ 0x20 /* Flash supports Dual Read */ #define SPI_NOR_QUAD_READ 0x40 /* Flash supports Quad Read */ #define USE_FSR 0x80 /* use flag status register */ +#define SPI_NOR_HAS_LOCK 0x100 /* Flash supports lock/unlock via SR */ }; #define JEDEC_MFR(info) ((info)->id[0]) @@ -1163,7 +1164,8 @@ int spi_nor_scan(struct spi_nor *nor, co if (JEDEC_MFR(info) == SNOR_MFR_ATMEL || JEDEC_MFR(info) == SNOR_MFR_INTEL || - JEDEC_MFR(info) == SNOR_MFR_SST) { + JEDEC_MFR(info) == SNOR_MFR_SST || + info->flags & SPI_NOR_HAS_LOCK) { write_enable(nor); write_sr(nor, 0); } @@ -1179,7 +1181,8 @@ int spi_nor_scan(struct spi_nor *nor, co mtd->_read = spi_nor_read; /* NOR protection support for STmicro/Micron chips and similar */ - if (JEDEC_MFR(info) == SNOR_MFR_MICRON) { + if (JEDEC_MFR(info) == SNOR_MFR_MICRON || + info->flags & SPI_NOR_HAS_LOCK) { nor->flash_lock = stm_lock; nor->flash_unlock = stm_unlock; nor->flash_is_locked = stm_is_locked;