From: Pratyush Yadav Date: Fri, 25 Jun 2021 19:17:23 +0000 (+0530) Subject: mtd: spi-nor-core: Detect Soft Reset sequence support from BFPT X-Git-Url: http://git.dujemihanovic.xyz/img/sics.gif?a=commitdiff_plain;h=a1122a3d98430754626547eb0acba11645039881;p=u-boot.git mtd: spi-nor-core: Detect Soft Reset sequence support from BFPT A Soft Reset sequence will return the flash to Power-on-Reset (POR) state. It consists of two commands: Soft Reset Enable and Soft Reset. Find out if the sequence is supported from BFPT DWORD 16. Signed-off-by: Pratyush Yadav Reviewed-by: Jagan Teki --- diff --git a/drivers/mtd/spi/spi-nor-core.c b/drivers/mtd/spi/spi-nor-core.c index b5b1ac8b5b..0d38ffc4f3 100644 --- a/drivers/mtd/spi/spi-nor-core.c +++ b/drivers/mtd/spi/spi-nor-core.c @@ -153,6 +153,8 @@ struct sfdp_header { #define BFPT_DWORD15_QER_SR2_BIT1_NO_RD (0x4UL << 20) #define BFPT_DWORD15_QER_SR2_BIT1 (0x5UL << 20) /* Spansion */ +#define BFPT_DWORD16_SOFT_RST BIT(12) + #define BFPT_DWORD18_CMD_EXT_MASK GENMASK(30, 29) #define BFPT_DWORD18_CMD_EXT_REP (0x0UL << 29) /* Repeat */ #define BFPT_DWORD18_CMD_EXT_INV (0x1UL << 29) /* Invert */ @@ -2104,6 +2106,10 @@ static int spi_nor_parse_bfpt(struct spi_nor *nor, break; } + /* Soft Reset support. */ + if (bfpt.dwords[BFPT_DWORD(16)] & BFPT_DWORD16_SOFT_RST) + nor->flags |= SNOR_F_SOFT_RESET; + /* Stop here if JESD216 rev B. */ if (bfpt_header->length == BFPT_DWORD_MAX_JESD216B) return spi_nor_post_bfpt_fixups(nor, bfpt_header, &bfpt, diff --git a/include/linux/mtd/spi-nor.h b/include/linux/mtd/spi-nor.h index aae814f557..b2159f6319 100644 --- a/include/linux/mtd/spi-nor.h +++ b/include/linux/mtd/spi-nor.h @@ -248,6 +248,7 @@ enum spi_nor_option_flags { SNOR_F_READY_XSR_RDY = BIT(4), SNOR_F_USE_CLSR = BIT(5), SNOR_F_BROKEN_RESET = BIT(6), + SNOR_F_SOFT_RESET = BIT(7), }; struct spi_nor;