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Wed, 20 May 2020 11:32:10 -0500 Received: from DFLE101.ent.ti.com (10.64.6.22) by DFLE114.ent.ti.com (10.64.6.35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3; Wed, 20 May 2020 11:32:09 -0500 Received: from fllv0040.itg.ti.com (10.64.41.20) by DFLE101.ent.ti.com (10.64.6.22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3 via Frontend Transport; Wed, 20 May 2020 11:32:09 -0500 Received: from pratyush-OptiPlex-790.dhcp.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0040.itg.ti.com (8.15.2/8.15.2) with ESMTP id 04KGUsxd001551; Wed, 20 May 2020 11:32:05 -0500 From: Pratyush Yadav To: Tudor Ambarus , Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Mark Brown , Nicolas Ferre , Alexandre Belloni , Ludovic Desroches , Matthias Brugger , , , , , Subject: [PATCH v6 14/19] mtd: spi-nor: sfdp: detect Soft Reset sequence support from BFPT Date: Wed, 20 May 2020 22:00:48 +0530 Message-ID: <20200520163053.24357-15-p.yadav@ti.com> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200520163053.24357-1-p.yadav@ti.com> References: <20200520163053.24357-1-p.yadav@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200520_093215_436204_EFF8781D X-CRM114-Status: GOOD ( 12.67 ) X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mason Yang , Boris Brezillon , Sekhar Nori , Pratyush Yadav Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org 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 --- drivers/mtd/spi-nor/core.h | 1 + drivers/mtd/spi-nor/sfdp.c | 4 ++++ drivers/mtd/spi-nor/sfdp.h | 2 ++ 3 files changed, 7 insertions(+) diff --git a/drivers/mtd/spi-nor/core.h b/drivers/mtd/spi-nor/core.h index 6338d32a0d77..79ce952c0539 100644 --- a/drivers/mtd/spi-nor/core.h +++ b/drivers/mtd/spi-nor/core.h @@ -26,6 +26,7 @@ enum spi_nor_option_flags { SNOR_F_HAS_SR_TB_BIT6 = BIT(11), SNOR_F_HAS_4BIT_BP = BIT(12), SNOR_F_HAS_SR_BP3_BIT6 = BIT(13), + SNOR_F_SOFT_RESET = BIT(14), }; struct spi_nor_read_command { diff --git a/drivers/mtd/spi-nor/sfdp.c b/drivers/mtd/spi-nor/sfdp.c index 9fd3d8d9a127..11109969dc3a 100644 --- a/drivers/mtd/spi-nor/sfdp.c +++ b/drivers/mtd/spi-nor/sfdp.c @@ -618,6 +618,10 @@ 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/drivers/mtd/spi-nor/sfdp.h b/drivers/mtd/spi-nor/sfdp.h index e15e30796d62..d1d43ee09a0a 100644 --- a/drivers/mtd/spi-nor/sfdp.h +++ b/drivers/mtd/spi-nor/sfdp.h @@ -84,6 +84,8 @@ struct sfdp_bfpt { #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 */ -- 2.26.2 ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/