From: Pratyush Yadav <p.yadav@ti.com>
To: Tudor Ambarus <tudor.ambarus@microchip.com>,
Miquel Raynal <miquel.raynal@bootlin.com>,
Richard Weinberger <richard@nod.at>,
Vignesh Raghavendra <vigneshr@ti.com>,
Mark Brown <broonie@kernel.org>,
Nicolas Ferre <nicolas.ferre@microchip.com>,
Alexandre Belloni <alexandre.belloni@bootlin.com>,
Ludovic Desroches <ludovic.desroches@microchip.com>,
Matthias Brugger <matthias.bgg@gmail.com>,
<linux-mtd@lists.infradead.org>, <linux-kernel@vger.kernel.org>,
<linux-spi@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-mediatek@lists.infradead.org>
Cc: Mason Yang <masonccyang@mxic.com.tw>,
Boris Brezillon <boris.brezillon@collabora.com>,
Sekhar Nori <nsekhar@ti.com>, Pratyush Yadav <p.yadav@ti.com>
Subject: [PATCH v7 15/20] mtd: spi-nor: sfdp: detect Soft Reset sequence support from BFPT
Date: Fri, 22 May 2020 15:42:56 +0530 [thread overview]
Message-ID: <20200522101301.26909-16-p.yadav@ti.com> (raw)
In-Reply-To: <20200522101301.26909-1-p.yadav@ti.com>
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 <p.yadav@ti.com>
---
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
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next prev parent reply other threads:[~2020-05-22 10:23 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-22 10:12 [PATCH v7 00/20] mtd: spi-nor: add xSPI Octal DTR support Pratyush Yadav
2020-05-22 10:12 ` [PATCH v7 01/20] spi: spi-mem: allow specifying whether an op is DTR or not Pratyush Yadav
2020-05-22 10:12 ` [PATCH v7 02/20] spi: spi-mem: allow specifying a command's extension Pratyush Yadav
2020-05-22 15:32 ` Boris Brezillon
2020-05-22 20:30 ` Pratyush Yadav
2020-05-22 10:12 ` [PATCH v7 03/20] spi: atmel-quadspi: reject DTR ops Pratyush Yadav
2020-05-22 10:12 ` [PATCH v7 04/20] spi: spi-mtk-nor: " Pratyush Yadav
2020-05-22 10:12 ` [PATCH v7 05/20] spi: mxic: Avoid endianness problems with 2-byte opcodes Pratyush Yadav
2020-05-22 10:12 ` [PATCH v7 06/20] mtd: spi-nor: add support for DTR protocol Pratyush Yadav
2020-05-22 10:12 ` [PATCH v7 07/20] mtd: spi-nor: sfdp: default to addr_width of 3 for configurable widths Pratyush Yadav
2020-05-22 10:12 ` [PATCH v7 08/20] mtd: spi-nor: sfdp: prepare BFPT parsing for JESD216 rev D Pratyush Yadav
2020-05-22 10:12 ` [PATCH v7 09/20] mtd: spi-nor: sfdp: get command opcode extension type from BFPT Pratyush Yadav
2020-05-22 10:12 ` [PATCH v7 10/20] mtd: spi-nor: sfdp: parse xSPI Profile 1.0 table Pratyush Yadav
2020-05-22 10:12 ` [PATCH v7 11/20] mtd: spi-nor: core: use dummy cycle and address width info from SFDP Pratyush Yadav
2020-05-22 10:12 ` [PATCH v7 12/20] mtd: spi-nor: core: do 2 byte reads for SR and FSR in DTR mode Pratyush Yadav
2020-05-22 10:12 ` [PATCH v7 13/20] mtd: spi-nor: core: enable octal DTR mode when possible Pratyush Yadav
2020-05-22 10:12 ` [PATCH v7 14/20] mtd: spi-nor: sfdp: do not make invalid quad enable fatal Pratyush Yadav
2020-05-22 10:12 ` Pratyush Yadav [this message]
2020-05-22 10:12 ` [PATCH v7 16/20] mtd: spi-nor: core: perform a Soft Reset on shutdown Pratyush Yadav
2020-05-22 10:12 ` [PATCH v7 17/20] mtd: spi-nor: core: disable Octal DTR mode on suspend Pratyush Yadav
2020-05-22 10:12 ` [PATCH v7 18/20] mtd: spi-nor: core: expose spi_nor_default_setup() in core.h Pratyush Yadav
2020-05-22 10:13 ` [PATCH v7 19/20] mtd: spi-nor: spansion: add support for Cypress Semper flash Pratyush Yadav
2020-05-22 10:13 ` [PATCH v7 20/20] mtd: spi-nor: micron-st: allow using MT35XU512ABA in Octal DTR mode Pratyush Yadav
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