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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>,
	Michal Simek <michal.simek@xilinx.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: Boris Brezillon <boris.brezillon@collabora.com>,
	Sekhar Nori <nsekhar@ti.com>, Pratyush Yadav <p.yadav@ti.com>
Subject: [PATCH v10 12/17] mtd: spi-nor: sfdp: detect Soft Reset sequence support from BFPT
Date: Wed, 24 Jun 2020 00:00:25 +0530	[thread overview]
Message-ID: <20200623183030.26591-13-p.yadav@ti.com> (raw)
In-Reply-To: <20200623183030.26591-1-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 7983ff431346..8e0741d8bfd3 100644
--- a/drivers/mtd/spi-nor/sfdp.c
+++ b/drivers/mtd/spi-nor/sfdp.c
@@ -616,6 +616,10 @@ 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 not JESD216 rev C or later. */
 	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 6d7243067252..8ae55e98084e 100644
--- a/drivers/mtd/spi-nor/sfdp.h
+++ b/drivers/mtd/spi-nor/sfdp.h
@@ -90,6 +90,8 @@ 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 */
-- 
2.27.0


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http://lists.infradead.org/mailman/listinfo/linux-mtd/

  parent reply	other threads:[~2020-06-23 18:38 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-23 18:30 [PATCH v10 00/17] mtd: spi-nor: add xSPI Octal DTR support Pratyush Yadav
2020-06-23 18:30 ` [PATCH v10 01/17] spi: spi-mem: allow specifying whether an op is DTR or not Pratyush Yadav
2020-07-08 16:22   ` Tudor.Ambarus
2020-07-13  3:55   ` Tudor.Ambarus
2020-06-23 18:30 ` [PATCH v10 02/17] spi: spi-mem: allow specifying a command's extension Pratyush Yadav
2020-07-13  6:15   ` Tudor.Ambarus
2020-06-23 18:30 ` [PATCH v10 03/17] spi: atmel-quadspi: reject DTR ops Pratyush Yadav
2020-07-13  6:19   ` Tudor.Ambarus
2020-06-23 18:30 ` [PATCH v10 04/17] spi: spi-mtk-nor: " Pratyush Yadav
2020-07-13  6:24   ` Tudor.Ambarus
2020-06-23 18:30 ` [PATCH v10 05/17] mtd: spi-nor: add support for DTR protocol Pratyush Yadav
2020-07-07 17:37   ` Tudor.Ambarus
2020-07-21 11:29     ` Pratyush Yadav
2020-09-29 15:42       ` Tudor.Ambarus
2020-09-29 16:29         ` Pratyush Yadav
2020-09-29 18:34           ` Tudor.Ambarus
2020-09-29 16:57         ` Vignesh Raghavendra
2020-06-23 18:30 ` [PATCH v10 06/17] mtd: spi-nor: sfdp: get command opcode extension type from BFPT Pratyush Yadav
2020-07-07 17:53   ` Tudor.Ambarus
2020-06-23 18:30 ` [PATCH v10 07/17] mtd: spi-nor: sfdp: parse xSPI Profile 1.0 table Pratyush Yadav
2020-07-08 16:01   ` Tudor.Ambarus
2020-07-20 16:38     ` Pratyush Yadav
2020-06-23 18:30 ` [PATCH v10 08/17] mtd: spi-nor: core: use dummy cycle and address width info from SFDP Pratyush Yadav
2020-07-08 16:03   ` Tudor.Ambarus
2020-07-20 16:24     ` Pratyush Yadav
2020-06-23 18:30 ` [PATCH v10 09/17] mtd: spi-nor: core: do 2 byte reads for SR and FSR in DTR mode Pratyush Yadav
2020-06-23 18:30 ` [PATCH v10 10/17] mtd: spi-nor: core: enable octal DTR mode when possible Pratyush Yadav
2020-06-23 18:30 ` [PATCH v10 11/17] mtd: spi-nor: sfdp: do not make invalid quad enable fatal Pratyush Yadav
2020-07-13  9:33   ` Tudor.Ambarus
2020-06-23 18:30 ` Pratyush Yadav [this message]
2020-07-08 16:08   ` [PATCH v10 12/17] mtd: spi-nor: sfdp: detect Soft Reset sequence support from BFPT Tudor.Ambarus
2020-07-20 16:21     ` Pratyush Yadav
2020-06-23 18:30 ` [PATCH v10 13/17] mtd: spi-nor: core: perform a Soft Reset on shutdown Pratyush Yadav
2020-07-08 16:10   ` Tudor.Ambarus
2020-07-20 16:11     ` Pratyush Yadav
2020-06-23 18:30 ` [PATCH v10 14/17] mtd: spi-nor: core: disable Octal DTR mode on suspend Pratyush Yadav
2020-06-23 18:30 ` [PATCH v10 15/17] mtd: spi-nor: core: expose spi_nor_default_setup() in core.h Pratyush Yadav
2020-06-23 18:30 ` [PATCH v10 16/17] mtd: spi-nor: spansion: add support for Cypress Semper flash Pratyush Yadav
2020-06-23 18:30 ` [PATCH v10 17/17] mtd: spi-nor: micron-st: allow using MT35XU512ABA in Octal DTR mode Pratyush Yadav
2020-07-13  6:34 ` [PATCH v10 00/17] mtd: spi-nor: add xSPI Octal DTR support Tudor.Ambarus
2020-07-14 19:19   ` Mark Brown
2020-07-15  3:40     ` Tudor.Ambarus
2020-07-14 16:40 ` Mark Brown

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