[PATCH v5 0/7] spi: add support for octal mode

[PATCH v5 0/7] spi: add support for octal mode

[Yogesh Narayan Gaur]

Add support for octal mode IO data transfer.
Micron flash, mt35xu512aba, supports octal mode data transfer and
NXP FlexSPI controller supports 8 data lines for data transfer (Rx/Tx).

Patch series
* Add support for octal mode flags and parsing of same in spi driver.
* Add parsing logic for spi-mem framework and m25p80.c device file.
* Add opcodes for octal I/O commands in spi-nor framework, Read and Write proto for (1-1-8/1-8-8) mode.
  Opcodes are added as per octal data IO commands required for mt35xu512aba [1] flash.
* Add mode bit required for octal mode in nxp-fspi driver [2].
* Define binding property 'spi-rx/tx-bus-width' for LX2160ARDB target [2].

Tested on LX2160ARDB target with nxp-fspi driver, below are
Read performance number of 1-1-1 and 1-1-8 read protocol.

 root@lxxx:~# cat /proc/mtd
 dev:    size   erasesize  name
 mtd0: 04000000 00001000 "spi0.0"
 mtd1: 04000000 00001000 "spi0.1"
 root@lxxx:~# time mtd_debug read /dev/mtd0 0x0 0x1000000 0read
 Copied 16777216 bytes from address 0x00000000 in flash to 0read

 real    0m2.792s
 user    0m0.000s
 sys     0m2.790s
 root@lxxx:~# time mtd_debug read /dev/mtd1 0x0 0x1000000 0read
 Copied 16777216 bytes from address 0x00000000 in flash to 0read

 real    0m0.441s
 user    0m0.000s
 sys     0m0.440s
 root@ls1012ardb:~#

 Flash device MTD0 configured in 1-1-1 protocol.
 Flash device MTD1 configured in 1-1-8 protocol.

[1] https://patchwork.ozlabs.org/project/linux-mtd/list/?series=70384&state=*
[2] https://patchwork.ozlabs.org/project/linux-mtd/list/?series=76402

Yogesh Gaur (7):
  spi: add support for octal mode I/O data transfer
  spi: spi-mem: add support for octal mode I/O data transfer
  mtd: spi-nor: add opcodes for octal Read/Write commands
  mtd: spi-nor: add octal read flag for flash mt35xu512aba
  mtd: m25p80: add support of octal mode I/O transfer
  spi: nxp-fspi: add octal mode flag bit for octal support
  arm64: dts: lx2160a: update fspi node

Changes for v5:
- Modified string 'octo' as 'octal' in all patches.
Changes for v4:
- Rebase on top of v4.20-rc2.
- Modify octo entries enum value in spi.h.
Changes for v3:
- Add octo mode support in spi_setup().
- Rename all patches with 'octal' string modified as 'octo'.
Changes for v2:
- Incorporated review comments of Boris and Vignesh.

 drivers/mtd/devices/m25p80.c                      |  9 ++++++++-
 drivers/mtd/spi-nor/spi-nor.c                     | 19 ++++++++++++++++---
 drivers/spi/spi-mem.c                             |  9 ++++++++-
 drivers/spi/spi-nxp-fspi.c                        |  4 ++--
 drivers/spi/spi.c                                 | 12 ++++++++++--
 include/linux/mtd/spi-nor.h                       |  8 ++++++++
 include/linux/spi/spi.h                           |  4 +++-
 8 files changed, 59 insertions(+), 10 deletions(-)

-- 
2.7.4

[PATCH v5 1/7] spi: add support for octal mode I/O data transfer

[Yogesh Narayan Gaur]

Add flags for Octal mode I/O data transfer
Required for the SPI controller which can do the data transfer (TX/RX)
on 8 data lines e.g. NXP FlexSPI controller.
 SPI_TX_OCTAL: transmit with 8 wires
 SPI_RX_OCTAL: receive with 8 wires

Signed-off-by: Yogesh Gaur <yogeshnarayan.gaur@nxp.com>
Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com>
---
Changes for v5:
- Modified string 'octo' with 'octal'.
Changes for v4:
- Rebase on top of v4.20-rc2
Changes for v3:
- Modified string 'octal' with 'octo'.
- Add octo mode support in spi_setup().
Changes for v2:
- Incorporated review comments of Boris.
---
 drivers/spi/spi.c       | 12 ++++++++++--
 include/linux/spi/spi.h |  4 +++-
 2 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 6ca5940..95249b8 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -1617,6 +1617,9 @@ static int of_spi_parse_dt(struct spi_controller *ctlr, struct spi_device *spi,
 		case 4:
 			spi->mode |= SPI_TX_QUAD;
 			break;
+		case 8:
+			spi->mode |= SPI_TX_OCTAL;
+			break;
 		default:
 			dev_warn(&ctlr->dev,
 				"spi-tx-bus-width %d not supported\n",
@@ -1635,6 +1638,9 @@ static int of_spi_parse_dt(struct spi_controller *ctlr, struct spi_device *spi,
 		case 4:
 			spi->mode |= SPI_RX_QUAD;
 			break;
+		case 8:
+			spi->mode |= SPI_RX_OCTAL;
+			break;
 		default:
 			dev_warn(&ctlr->dev,
 				"spi-rx-bus-width %d not supported\n",
@@ -2823,7 +2829,8 @@ int spi_setup(struct spi_device *spi)
 	/* if it is SPI_3WIRE mode, DUAL and QUAD should be forbidden
 	 */
 	if ((spi->mode & SPI_3WIRE) && (spi->mode &
-		(SPI_TX_DUAL | SPI_TX_QUAD | SPI_RX_DUAL | SPI_RX_QUAD)))
+		(SPI_TX_DUAL | SPI_TX_QUAD | SPI_TX_OCTAL |
+		 SPI_RX_DUAL | SPI_RX_QUAD | SPI_RX_OCTAL)))
 		return -EINVAL;
 	/* help drivers fail *cleanly* when they need options
 	 * that aren't supported with their current controller
@@ -2832,7 +2839,8 @@ int spi_setup(struct spi_device *spi)
 	 */
 	bad_bits = spi->mode & ~(spi->controller->mode_bits | SPI_CS_WORD);
 	ugly_bits = bad_bits &
-		    (SPI_TX_DUAL | SPI_TX_QUAD | SPI_RX_DUAL | SPI_RX_QUAD);
+		    (SPI_TX_DUAL | SPI_TX_QUAD | SPI_TX_OCTAL |
+		     SPI_RX_DUAL | SPI_RX_QUAD | SPI_RX_OCTAL);
 	if (ugly_bits) {
 		dev_warn(&spi->dev,
 			 "setup: ignoring unsupported mode bits %x\n",
diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
index 6be77fa..0c1ca5d 100644
--- a/include/linux/spi/spi.h
+++ b/include/linux/spi/spi.h
@@ -154,7 +154,9 @@ struct spi_device {
 #define	SPI_TX_QUAD	0x200			/* transmit with 4 wires */
 #define	SPI_RX_DUAL	0x400			/* receive with 2 wires */
 #define	SPI_RX_QUAD	0x800			/* receive with 4 wires */
-#define SPI_CS_WORD	0x1000			/* toggle cs after each word */
+#define	SPI_CS_WORD	0x1000			/* toggle cs after each word */
+#define	SPI_TX_OCTAL	0x2000			/* transmit with 8 wires */
+#define	SPI_RX_OCTAL	0x4000			/* receive with 8 wires */
 	int			irq;
 	void			*controller_state;
 	void			*controller_data;
-- 
2.7.4

[PATCH v5 2/7] spi: spi-mem: add support for octal mode I/O data transfer

[Yogesh Narayan Gaur]

Add support for octal mode I/O data transfer in spi-mem framework.

Signed-off-by: Yogesh Gaur <yogeshnarayan.gaur@nxp.com>
Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com>
---
Changes for v5:
- Modified string 'octo' with 'octal'.
Changes for v4:
- None
Changes for v3:
- Modified string 'octal' with 'octo'.
Changes for v2:
- Patch added in v2 version.

 drivers/spi/spi-mem.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/spi/spi-mem.c b/drivers/spi/spi-mem.c
index 62a7b80..5e15d62 100644
--- a/drivers/spi/spi-mem.c
+++ b/drivers/spi/spi-mem.c
@@ -12,7 +12,7 @@
 
 #include "internals.h"
 
-#define SPI_MEM_MAX_BUSWIDTH		4
+#define SPI_MEM_MAX_BUSWIDTH		8
 
 /**
  * spi_controller_dma_map_mem_op_data() - DMA-map the buffer attached to a
@@ -121,6 +121,13 @@ static int spi_check_buswidth_req(struct spi_mem *mem, u8 buswidth, bool tx)
 
 		break;
 
+	case 8:
+		if ((tx && (mode & SPI_TX_OCTAL)) ||
+		    (!tx && (mode & SPI_RX_OCTAL)))
+			return 0;
+
+		break;
+
 	default:
 		break;
 	}
-- 
2.7.4

[PATCH v5 3/7] mtd: spi-nor: add opcodes for octal Read/Write commands

[Yogesh Narayan Gaur]

- Add opcodes for octal I/O commands
  * Read  : 1-1-8 and 1-8-8 protocol
  * Write : 1-1-8 and 1-8-8 protocol
  * opcodes for 4-byte address mode command

- Entry of macros in _convert_3to4_xxx function

- Add flag specifying flash support octal read commands.

Signed-off-by: Vignesh R <vigneshr@ti.com>
Signed-off-by: Yogesh Gaur <yogeshnarayan.gaur@nxp.com>
---
Changes for v5:
- Modified string 'octo' with 'octal'.
Changes for v4:
- None
Changes for v3:
- Modified string 'octal' with 'octo'.
Changes for v2:
- Incorporated review comments of Boris and Vignesh

 drivers/mtd/spi-nor/spi-nor.c | 16 ++++++++++++++--
 include/linux/mtd/spi-nor.h   |  8 ++++++++
 2 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
index 398d273..7a2176d 100644
--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
@@ -90,6 +90,7 @@ struct flash_info {
 #define NO_CHIP_ERASE		BIT(12) /* Chip does not support chip erase */
 #define SPI_NOR_SKIP_SFDP	BIT(13)	/* Skip parsing of SFDP tables */
 #define USE_CLSR		BIT(14)	/* use CLSR command */
+#define SPI_NOR_OCTAL_READ	BIT(15)	/* Flash supports Octal Read */
 
 	int	(*quad_enable)(struct spi_nor *nor);
 };
@@ -209,6 +210,8 @@ static inline u8 spi_nor_convert_3to4_read(u8 opcode)
 		{ SPINOR_OP_READ_1_2_2,	SPINOR_OP_READ_1_2_2_4B },
 		{ SPINOR_OP_READ_1_1_4,	SPINOR_OP_READ_1_1_4_4B },
 		{ SPINOR_OP_READ_1_4_4,	SPINOR_OP_READ_1_4_4_4B },
+		{ SPINOR_OP_READ_1_1_8,	SPINOR_OP_READ_1_1_8_4B },
+		{ SPINOR_OP_READ_1_8_8,	SPINOR_OP_READ_1_8_8_4B },
 
 		{ SPINOR_OP_READ_1_1_1_DTR,	SPINOR_OP_READ_1_1_1_DTR_4B },
 		{ SPINOR_OP_READ_1_2_2_DTR,	SPINOR_OP_READ_1_2_2_DTR_4B },
@@ -225,6 +228,8 @@ static inline u8 spi_nor_convert_3to4_program(u8 opcode)
 		{ SPINOR_OP_PP,		SPINOR_OP_PP_4B },
 		{ SPINOR_OP_PP_1_1_4,	SPINOR_OP_PP_1_1_4_4B },
 		{ SPINOR_OP_PP_1_4_4,	SPINOR_OP_PP_1_4_4_4B },
+		{ SPINOR_OP_PP_1_1_8,	SPINOR_OP_PP_1_1_8_4B },
+		{ SPINOR_OP_PP_1_8_8,	SPINOR_OP_PP_1_8_8_4B },
 	};
 
 	return spi_nor_convert_opcode(opcode, spi_nor_3to4_program,
@@ -2093,7 +2098,7 @@ enum spi_nor_read_command_index {
 	SNOR_CMD_READ_4_4_4,
 	SNOR_CMD_READ_1_4_4_DTR,
 
-	/* Octo SPI */
+	/* Octal SPI */
 	SNOR_CMD_READ_1_1_8,
 	SNOR_CMD_READ_1_8_8,
 	SNOR_CMD_READ_8_8_8,
@@ -2110,7 +2115,7 @@ enum spi_nor_pp_command_index {
 	SNOR_CMD_PP_1_4_4,
 	SNOR_CMD_PP_4_4_4,
 
-	/* Octo SPI */
+	/* Octal SPI */
 	SNOR_CMD_PP_1_1_8,
 	SNOR_CMD_PP_1_8_8,
 	SNOR_CMD_PP_8_8_8,
@@ -3195,6 +3200,13 @@ static int spi_nor_init_params(struct spi_nor *nor,
 					  SNOR_PROTO_1_1_4);
 	}
 
+	if (info->flags & SPI_NOR_OCTAL_READ) {
+		params->hwcaps.mask |= SNOR_HWCAPS_READ_1_1_8;
+		spi_nor_set_read_settings(&params->reads[SNOR_CMD_READ_1_1_8],
+					  0, 8, SPINOR_OP_READ_1_1_8,
+					  SNOR_PROTO_1_1_8);
+	}
+
 	/* Page Program settings. */
 	params->hwcaps.mask |= SNOR_HWCAPS_PP;
 	spi_nor_set_pp_settings(&params->page_programs[SNOR_CMD_PP],
diff --git a/include/linux/mtd/spi-nor.h b/include/linux/mtd/spi-nor.h
index 8b1acf6..019f534 100644
--- a/include/linux/mtd/spi-nor.h
+++ b/include/linux/mtd/spi-nor.h
@@ -50,9 +50,13 @@
 #define SPINOR_OP_READ_1_2_2	0xbb	/* Read data bytes (Dual I/O SPI) */
 #define SPINOR_OP_READ_1_1_4	0x6b	/* Read data bytes (Quad Output SPI) */
 #define SPINOR_OP_READ_1_4_4	0xeb	/* Read data bytes (Quad I/O SPI) */
+#define SPINOR_OP_READ_1_1_8	0x8b	/* Read data bytes (Octal Output SPI) */
+#define SPINOR_OP_READ_1_8_8	0xcb	/* Read data bytes (Octal I/O SPI) */
 #define SPINOR_OP_PP		0x02	/* Page program (up to 256 bytes) */
 #define SPINOR_OP_PP_1_1_4	0x32	/* Quad page program */
 #define SPINOR_OP_PP_1_4_4	0x38	/* Quad page program */
+#define SPINOR_OP_PP_1_1_8	0x82	/* Octal page program */
+#define SPINOR_OP_PP_1_8_8	0xc2	/* Octal page program */
 #define SPINOR_OP_BE_4K		0x20	/* Erase 4KiB block */
 #define SPINOR_OP_BE_4K_PMC	0xd7	/* Erase 4KiB block on PMC chips */
 #define SPINOR_OP_BE_32K	0x52	/* Erase 32KiB block */
@@ -73,9 +77,13 @@
 #define SPINOR_OP_READ_1_2_2_4B	0xbc	/* Read data bytes (Dual I/O SPI) */
 #define SPINOR_OP_READ_1_1_4_4B	0x6c	/* Read data bytes (Quad Output SPI) */
 #define SPINOR_OP_READ_1_4_4_4B	0xec	/* Read data bytes (Quad I/O SPI) */
+#define SPINOR_OP_READ_1_1_8_4B	0x7c	/* Read data bytes (Octal Output SPI) */
+#define SPINOR_OP_READ_1_8_8_4B	0xcc	/* Read data bytes (Octal I/O SPI) */
 #define SPINOR_OP_PP_4B		0x12	/* Page program (up to 256 bytes) */
 #define SPINOR_OP_PP_1_1_4_4B	0x34	/* Quad page program */
 #define SPINOR_OP_PP_1_4_4_4B	0x3e	/* Quad page program */
+#define SPINOR_OP_PP_1_1_8_4B	0x84	/* Octal page program */
+#define SPINOR_OP_PP_1_8_8_4B	0x8e	/* Octal page program */
 #define SPINOR_OP_BE_4K_4B	0x21	/* Erase 4KiB block */
 #define SPINOR_OP_BE_32K_4B	0x5c	/* Erase 32KiB block */
 #define SPINOR_OP_SE_4B		0xdc	/* Sector erase (usually 64KiB) */
-- 
2.7.4

[PATCH v5 4/7] mtd: spi-nor: add octal read flag for flash mt35xu512aba

[Yogesh Narayan Gaur]

Add octal read flag for flash mt35xu512aba.
This flash, mt35xu512aba, is only complaint to SFDP JESD216B and does
not seem to support newer JESD216C standard that provides auto
detection of Octal mode capabilities and opcodes. Therefore, this
capability is manually added using new SPI_NOR_OCTAL_READ flag.

Signed-off-by: Vignesh R <vigneshr@ti.com>
Signed-off-by: Yogesh Gaur <yogeshnarayan.gaur@nxp.com>
---
Changes for v5:
- Modified string 'octo' with 'octal'.
Changes for v4:
- None
Changes for v3:
- Modified string 'octal' with 'octo'.
Changes for v2:
- Incorporated review comments of Boris and Vignesh

 drivers/mtd/spi-nor/spi-nor.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
index 7a2176d..41ba90b 100644
--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
@@ -1413,7 +1413,8 @@ static const struct flash_info spi_nor_ids[] = {
 	/* Micron */
 	{
 		"mt35xu512aba", INFO(0x2c5b1a, 0, 128 * 1024, 512,
-			SECT_4K | USE_FSR | SPI_NOR_4B_OPCODES)
+			SECT_4K | USE_FSR | SPI_NOR_OCTAL_READ |
+			SPI_NOR_4B_OPCODES)
 	},
 
 	/* PMC */
-- 
2.7.4

[PATCH v5 5/7] mtd: m25p80: add support of octal mode I/O transfer

[Yogesh Narayan Gaur]

Add support for octal mode I/O data transfer based on the controller (spi)
mode.
Assign hw-capability mask bits for octal transfer.

Signed-off-by: Yogesh Gaur <yogeshnarayan.gaur@nxp.com>
---
Changes for v5:
- Modified string 'octo' with 'octal'.
Changes for v4:
- None
Changes for v3:
- Modified string 'octal' with 'octo'.
Changes for v2:
- Incorporated review comments of Boris.

 drivers/mtd/devices/m25p80.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c
index c4a1d04..651bab6 100644
--- a/drivers/mtd/devices/m25p80.c
+++ b/drivers/mtd/devices/m25p80.c
@@ -195,7 +195,14 @@ static int m25p_probe(struct spi_mem *spimem)
 	spi_mem_set_drvdata(spimem, flash);
 	flash->spimem = spimem;
 
-	if (spi->mode & SPI_RX_QUAD) {
+	if (spi->mode & SPI_RX_OCTAL) {
+		hwcaps.mask |= SNOR_HWCAPS_READ_1_1_8;
+
+		if (spi->mode & SPI_TX_OCTAL)
+			hwcaps.mask |= (SNOR_HWCAPS_READ_1_8_8 |
+					SNOR_HWCAPS_PP_1_1_8 |
+					SNOR_HWCAPS_PP_1_8_8);
+	} else if (spi->mode & SPI_RX_QUAD) {
 		hwcaps.mask |= SNOR_HWCAPS_READ_1_1_4;
 
 		if (spi->mode & SPI_TX_QUAD)
-- 
2.7.4

[PATCH v5 6/7] spi: nxp-fspi: add octal mode flag bit for octal support

[Yogesh Narayan Gaur]

Add octal mode flags for octal I/O data transfer support.
NXP FlexSPI controller supports 8 lines Rx/Tx data transfer.

Signed-off-by: Yogesh Gaur <yogeshnarayan.gaur@nxp.com>
---
Changes for v5:
- Modified string 'octo' with 'octal'.
Changes for v4:
- None
Changes for v3:
- Modified string 'octal' with 'octo'.
Changes for v2:
- None

 drivers/spi/spi-nxp-fspi.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi-nxp-fspi.c b/drivers/spi/spi-nxp-fspi.c
index a35013b..b65f27c 100644
--- a/drivers/spi/spi-nxp-fspi.c
+++ b/drivers/spi/spi-nxp-fspi.c
@@ -995,8 +995,8 @@ static int nxp_fspi_probe(struct platform_device *pdev)
 	if (!ctlr)
 		return -ENOMEM;
 
-	ctlr->mode_bits = SPI_RX_DUAL | SPI_RX_QUAD |
-			  SPI_TX_DUAL | SPI_TX_QUAD;
+	ctlr->mode_bits = SPI_RX_DUAL | SPI_RX_QUAD | SPI_RX_OCTAL |
+			  SPI_TX_DUAL | SPI_TX_QUAD | SPI_TX_OCTAL;
 
 	f = spi_controller_get_devdata(ctlr);
 	f->dev = dev;
-- 
2.7.4

[PATCH v5 7/7] arm64: dts: lx2160a: update fspi node

[Yogesh Narayan Gaur]

Flash mt35xu512aba connected to FlexSPI controller supports
1-1-8/1-8-8 protocol.
Added flag spi-rx-bus-width and spi-tx-bus-width with values as
8 and 8 respectively for both flashes connected at CS0 and CS1.

Signed-off-by: Yogesh Gaur <yogeshnarayan.gaur@nxp.com>
---
Changes for v5:
- None
Changes for v4:
- None
Changes for v3:
- None
Changes for v2:
- None

 arch/arm64/boot/dts/freescale/fsl-lx2160a-rdb.dts | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/fsl-lx2160a-rdb.dts b/arch/arm64/boot/dts/freescale/fsl-lx2160a-rdb.dts
index 3b20c97..24cc41c 100644
--- a/arch/arm64/boot/dts/freescale/fsl-lx2160a-rdb.dts
+++ b/arch/arm64/boot/dts/freescale/fsl-lx2160a-rdb.dts
@@ -45,6 +45,8 @@
 		m25p,fast-read;
 		spi-max-frequency = <20000000>;
 		reg = <0>;
+		spi-rx-bus-width = <8>;
+		spi-tx-bus-width = <8>;
 	};
 
 	mt35xu512aba1: flash@1 {
@@ -54,6 +56,8 @@
 		m25p,fast-read;
 		spi-max-frequency = <20000000>;
 		reg = <1>;
+		spi-rx-bus-width = <8>;
+		spi-tx-bus-width = <8>;
 	};
 };
 
-- 
2.7.4

Re: [PATCH v5 0/7] spi: add support for octal mode

[Boris Brezillon]

Hi Mark,

On Mon, 3 Dec 2018 08:39:00 +0000
Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com> wrote:

> 
> Yogesh Gaur (7):
>   spi: add support for octal mode I/O data transfer
>   spi: spi-mem: add support for octal mode I/O data transfer

Can you take those 2 patches in your tree for 4.21/5.0?

>   mtd: spi-nor: add opcodes for octal Read/Write commands
>   mtd: spi-nor: add octal read flag for flash mt35xu512aba
>   mtd: m25p80: add support of octal mode I/O transfer
>   spi: nxp-fspi: add octal mode flag bit for octal support

I'll queue these ones after 4.21-rc1/5.0-rc1 is out (which means
they'll appear in 4.22/5.1).

>   arm64: dts: lx2160a: update fspi node

Applied "spi: add support for octal mode I/O data transfer" to the spi tree

[Mark Brown]

The patch

   spi: add support for octal mode I/O data transfer

has been applied to the spi tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

From 6b03061f882de49b83ccf44beb3a12c920a2da1b Mon Sep 17 00:00:00 2001
From: Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com>
Date: Mon, 3 Dec 2018 08:39:06 +0000
Subject: [PATCH] spi: add support for octal mode I/O data transfer

Add flags for Octal mode I/O data transfer
Required for the SPI controller which can do the data transfer (TX/RX)
on 8 data lines e.g. NXP FlexSPI controller.
 SPI_TX_OCTAL: transmit with 8 wires
 SPI_RX_OCTAL: receive with 8 wires

Signed-off-by: Yogesh Gaur <yogeshnarayan.gaur@nxp.com>
Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/spi/spi.c       | 12 ++++++++++--
 include/linux/spi/spi.h |  4 +++-
 2 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index b6fd8ea8ac0d..18ebc400249c 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -1633,6 +1633,9 @@ static int of_spi_parse_dt(struct spi_controller *ctlr, struct spi_device *spi,
 		case 4:
 			spi->mode |= SPI_TX_QUAD;
 			break;
+		case 8:
+			spi->mode |= SPI_TX_OCTAL;
+			break;
 		default:
 			dev_warn(&ctlr->dev,
 				"spi-tx-bus-width %d not supported\n",
@@ -1651,6 +1654,9 @@ static int of_spi_parse_dt(struct spi_controller *ctlr, struct spi_device *spi,
 		case 4:
 			spi->mode |= SPI_RX_QUAD;
 			break;
+		case 8:
+			spi->mode |= SPI_RX_OCTAL;
+			break;
 		default:
 			dev_warn(&ctlr->dev,
 				"spi-rx-bus-width %d not supported\n",
@@ -2839,7 +2845,8 @@ int spi_setup(struct spi_device *spi)
 	/* if it is SPI_3WIRE mode, DUAL and QUAD should be forbidden
 	 */
 	if ((spi->mode & SPI_3WIRE) && (spi->mode &
-		(SPI_TX_DUAL | SPI_TX_QUAD | SPI_RX_DUAL | SPI_RX_QUAD)))
+		(SPI_TX_DUAL | SPI_TX_QUAD | SPI_TX_OCTAL |
+		 SPI_RX_DUAL | SPI_RX_QUAD | SPI_RX_OCTAL)))
 		return -EINVAL;
 	/* help drivers fail *cleanly* when they need options
 	 * that aren't supported with their current controller
@@ -2848,7 +2855,8 @@ int spi_setup(struct spi_device *spi)
 	 */
 	bad_bits = spi->mode & ~(spi->controller->mode_bits | SPI_CS_WORD);
 	ugly_bits = bad_bits &
-		    (SPI_TX_DUAL | SPI_TX_QUAD | SPI_RX_DUAL | SPI_RX_QUAD);
+		    (SPI_TX_DUAL | SPI_TX_QUAD | SPI_TX_OCTAL |
+		     SPI_RX_DUAL | SPI_RX_QUAD | SPI_RX_OCTAL);
 	if (ugly_bits) {
 		dev_warn(&spi->dev,
 			 "setup: ignoring unsupported mode bits %x\n",
diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
index 6be77fa5ab90..0c1ca5dedbb4 100644
--- a/include/linux/spi/spi.h
+++ b/include/linux/spi/spi.h
@@ -154,7 +154,9 @@ struct spi_device {
 #define	SPI_TX_QUAD	0x200			/* transmit with 4 wires */
 #define	SPI_RX_DUAL	0x400			/* receive with 2 wires */
 #define	SPI_RX_QUAD	0x800			/* receive with 4 wires */
-#define SPI_CS_WORD	0x1000			/* toggle cs after each word */
+#define	SPI_CS_WORD	0x1000			/* toggle cs after each word */
+#define	SPI_TX_OCTAL	0x2000			/* transmit with 8 wires */
+#define	SPI_RX_OCTAL	0x4000			/* receive with 8 wires */
 	int			irq;
 	void			*controller_state;
 	void			*controller_data;
-- 
2.19.0.rc2

Re: [PATCH v5 0/7] spi: add support for octal mode

[Vignesh R]

Hi Boris,

On 03/12/18 2:49 PM, Boris Brezillon wrote:
> Hi Mark,
> 
> On Mon, 3 Dec 2018 08:39:00 +0000
> Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com> wrote:
> 
>>
>> Yogesh Gaur (7):
>>   spi: add support for octal mode I/O data transfer
>>   spi: spi-mem: add support for octal mode I/O data transfer
> 
> Can you take those 2 patches in your tree for 4.21/5.0?
> 

>>   mtd: spi-nor: add opcodes for octal Read/Write commands
>>   mtd: spi-nor: add octal read flag for flash mt35xu512aba

Could you consider merging these two patches alone for v4.21?
These can be applied independent of other patches in the series and
would allow supporting OSPI flash at SPI NOR level with Cadence QSPI driver.

>>   mtd: m25p80: add support of octal mode I/O transfer
>>   spi: nxp-fspi: add octal mode flag bit for octal support
> 
> I'll queue these ones after 4.21-rc1/5.0-rc1 is out (which means
> they'll appear in 4.22/5.1).
> 
>>   arm64: dts: lx2160a: update fspi node

-- 
Regards
Vignesh

Re: [PATCH v5 0/7] spi: add support for octal mode

[Boris Brezillon]

On Wed, 5 Dec 2018 17:25:12 +0530
Vignesh R <vigneshr@ti.com> wrote:

> >>   mtd: spi-nor: add opcodes for octal Read/Write commands
> >>   mtd: spi-nor: add octal read flag for flash mt35xu512aba  
> 
> Could you consider merging these two patches alone for v4.21?
> These can be applied independent of other patches in the series and
> would allow supporting OSPI flash at SPI NOR level with Cadence QSPI driver.

Yep, I'll queue them to spi-nor/next.

> >>   spi: nxp-fspi: add octal mode flag bit for octal support  

Mark, I think you can pick this one too.

Re: [PATCH v5 0/7] spi: add support for octal mode

[Mark Brown]

[-- Attachment #1: Type: text/plain, Size: 370 bytes --]

On Wed, Dec 05, 2018 at 01:46:18PM +0100, Boris Brezillon wrote:
> Vignesh R <vigneshr@ti.com> wrote:

> > >>   spi: nxp-fspi: add octal mode flag bit for octal support  

> Mark, I think you can pick this one too.

I don't have this any more, it looked like this was stuck behind the
otehr MTD changes which seemed to have problems.  If someone could
resend?

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 488 bytes --]

RE: [PATCH v5 0/7] spi: add support for octal mode

[Yogesh Narayan Gaur]

Hi Boris,

> -----Original Message-----
> From: Boris Brezillon [mailto:boris.brezillon@bootlin.com]
> Sent: Wednesday, December 5, 2018 6:16 PM
> To: Vignesh R <vigneshr@ti.com>; broonie@kernel.org
> Cc: Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com>; linux-
> mtd@lists.infradead.org; marek.vasut@gmail.com; linux-spi@vger.kernel.org;
> devicetree@vger.kernel.org; robh@kernel.org; mark.rutland@arm.com;
> shawnguo@kernel.org; linux-arm-kernel@lists.infradead.org;
> computersforpeace@gmail.com; frieder.schrempf@exceet.de; linux-
> kernel@vger.kernel.org
> Subject: Re: [PATCH v5 0/7] spi: add support for octal mode
> 
> On Wed, 5 Dec 2018 17:25:12 +0530
> Vignesh R <vigneshr@ti.com> wrote:
> 
> > >>   mtd: spi-nor: add opcodes for octal Read/Write commands
> > >>   mtd: spi-nor: add octal read flag for flash mt35xu512aba
> >
> > Could you consider merging these two patches alone for v4.21?
> > These can be applied independent of other patches in the series and
> > would allow supporting OSPI flash at SPI NOR level with Cadence QSPI driver.
> 
> Yep, I'll queue them to spi-nor/next.
> 
> > >>   spi: nxp-fspi: add octal mode flag bit for octal support
> 
> Mark, I think you can pick this one too.

This patch is dependent on the series [1] which is yet to be applied by you, please apply.

--
Regards
Yogesh Gaur
[1] https://patchwork.ozlabs.org/project/linux-mtd/list/?series=76402

Re: [PATCH v5 0/7] spi: add support for octal mode

[Boris Brezillon]

On Thu, 6 Dec 2018 04:20:26 +0000
Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com> wrote:

> Hi Boris,
> 
> > -----Original Message-----
> > From: Boris Brezillon [mailto:boris.brezillon@bootlin.com]
> > Sent: Wednesday, December 5, 2018 6:16 PM
> > To: Vignesh R <vigneshr@ti.com>; broonie@kernel.org
> > Cc: Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com>; linux-
> > mtd@lists.infradead.org; marek.vasut@gmail.com; linux-spi@vger.kernel.org;
> > devicetree@vger.kernel.org; robh@kernel.org; mark.rutland@arm.com;
> > shawnguo@kernel.org; linux-arm-kernel@lists.infradead.org;
> > computersforpeace@gmail.com; frieder.schrempf@exceet.de; linux-
> > kernel@vger.kernel.org
> > Subject: Re: [PATCH v5 0/7] spi: add support for octal mode
> > 
> > On Wed, 5 Dec 2018 17:25:12 +0530
> > Vignesh R <vigneshr@ti.com> wrote:
> >   
> > > >>   mtd: spi-nor: add opcodes for octal Read/Write commands
> > > >>   mtd: spi-nor: add octal read flag for flash mt35xu512aba  
> > >
> > > Could you consider merging these two patches alone for v4.21?
> > > These can be applied independent of other patches in the series and
> > > would allow supporting OSPI flash at SPI NOR level with Cadence QSPI driver.  
> > 
> > Yep, I'll queue them to spi-nor/next.
> >   
> > > >>   spi: nxp-fspi: add octal mode flag bit for octal support  
> > 
> > Mark, I think you can pick this one too.  
> 
> This patch is dependent on the series [1] which is yet to be applied by you, please apply.

By me? I can't apply SPI patches.

RE: [PATCH v5 0/7] spi: add support for octal mode

[Yogesh Narayan Gaur]

Hi Boris,

> -----Original Message-----
> From: Boris Brezillon [mailto:boris.brezillon@bootlin.com]
> Sent: Thursday, December 6, 2018 12:16 PM
> To: Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com>
> Cc: Vignesh R <vigneshr@ti.com>; broonie@kernel.org; linux-
> mtd@lists.infradead.org; marek.vasut@gmail.com; linux-spi@vger.kernel.org;
> devicetree@vger.kernel.org; robh@kernel.org; mark.rutland@arm.com;
> shawnguo@kernel.org; linux-arm-kernel@lists.infradead.org;
> computersforpeace@gmail.com; frieder.schrempf@exceet.de; linux-
> kernel@vger.kernel.org
> Subject: Re: [PATCH v5 0/7] spi: add support for octal mode
> 
> On Thu, 6 Dec 2018 04:20:26 +0000
> Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com> wrote:
> 
> > Hi Boris,
> >
> > > -----Original Message-----
> > > From: Boris Brezillon [mailto:boris.brezillon@bootlin.com]
> > > Sent: Wednesday, December 5, 2018 6:16 PM
> > > To: Vignesh R <vigneshr@ti.com>; broonie@kernel.org
> > > Cc: Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com>; linux-
> > > mtd@lists.infradead.org; marek.vasut@gmail.com;
> > > linux-spi@vger.kernel.org; devicetree@vger.kernel.org;
> > > robh@kernel.org; mark.rutland@arm.com; shawnguo@kernel.org;
> > > linux-arm-kernel@lists.infradead.org;
> > > computersforpeace@gmail.com; frieder.schrempf@exceet.de; linux-
> > > kernel@vger.kernel.org
> > > Subject: Re: [PATCH v5 0/7] spi: add support for octal mode
> > >
> > > On Wed, 5 Dec 2018 17:25:12 +0530
> > > Vignesh R <vigneshr@ti.com> wrote:
> > >
> > > > >>   mtd: spi-nor: add opcodes for octal Read/Write commands
> > > > >>   mtd: spi-nor: add octal read flag for flash mt35xu512aba
> > > >
> > > > Could you consider merging these two patches alone for v4.21?
> > > > These can be applied independent of other patches in the series
> > > > and would allow supporting OSPI flash at SPI NOR level with Cadence QSPI
> driver.
> > >
> > > Yep, I'll queue them to spi-nor/next.
> > >
> > > > >>   spi: nxp-fspi: add octal mode flag bit for octal support
> > >
> > > Mark, I think you can pick this one too.
> >
> > This patch is dependent on the series [1] which is yet to be applied by you,
> please apply.
> 
> By me? I can't apply SPI patches.

Sorry for ignorance. Did patches needs to be applied by Mark Brown, should I resend the patch series again?
Also can you please review the series [1] and add your Reviewed-by tag.

--
Regards
Yogesh Gaur

[1] https://patchwork.ozlabs.org/project/linux-mtd/list/?series=76402

Re: [PATCH v5 0/7] spi: add support for octal mode

[Mark Brown]

[-- Attachment #1: Type: text/plain, Size: 481 bytes --]

On Thu, Dec 06, 2018 at 06:49:08AM +0000, Yogesh Narayan Gaur wrote:

> Sorry for ignorance. Did patches needs to be applied by Mark Brown, should I resend the patch series again?
> Also can you please review the series [1] and add your Reviewed-by tag.

As I said in my reply earlier today in the same thread:

| I don't have this any more, it looked like this was stuck behind the
| otehr MTD changes which seemed to have problems.  If someone could
| resend?

so please resend.

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 488 bytes --]

RE: [PATCH v5 0/7] spi: add support for octal mode

[Yogesh Narayan Gaur]

Hi Mark,

Patch has been resend [1], this patch is depends on the series of patch[2] and this series has been applied by Boris already.

[1] https://patchwork.ozlabs.org/patch/1010253/
[2] https://patchwork.ozlabs.org/project/linux-mtd/list/?series=70384&state=*

--
Regards
Yogesh Gaur

> -----Original Message-----
> From: Mark Brown [mailto:broonie@kernel.org]
> Sent: Friday, December 7, 2018 2:00 AM
> To: Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com>
> Cc: Boris Brezillon <boris.brezillon@bootlin.com>; Vignesh R <vigneshr@ti.com>;
> linux-mtd@lists.infradead.org; marek.vasut@gmail.com; linux-
> spi@vger.kernel.org; devicetree@vger.kernel.org; robh@kernel.org;
> mark.rutland@arm.com; shawnguo@kernel.org; linux-arm-
> kernel@lists.infradead.org; computersforpeace@gmail.com;
> frieder.schrempf@exceet.de; linux-kernel@vger.kernel.org
> Subject: Re: [PATCH v5 0/7] spi: add support for octal mode
> 
> On Thu, Dec 06, 2018 at 06:49:08AM +0000, Yogesh Narayan Gaur wrote:
> 
> > Sorry for ignorance. Did patches needs to be applied by Mark Brown, should I
> resend the patch series again?
> > Also can you please review the series [1] and add your Reviewed-by tag.
> 
> As I said in my reply earlier today in the same thread:
> 
> | I don't have this any more, it looked like this was stuck behind the
> | otehr MTD changes which seemed to have problems.  If someone could
> | resend?
> 
> so please resend.

Re: [PATCH v5 0/7] spi: add support for octal mode

[Boris Brezillon]

Hi Yogesh,

On Mon, 10 Dec 2018 04:13:28 +0000
Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com> wrote:

> Hi Mark,
> 
> Patch has been resend [1], this patch is depends on the series of patch[2] and this series has been applied by Boris already.

You're still not asking the right person. Every patches touching
things in drivers/mtd/ should be taken by me (or another MTD
maintainer), and patches touching things in drivers/spi/ should be
taken by Mark. So, the patch you're pointing to should be applied by
me. Plus, I told you I would apply it after 4.21-rc1 because I don't
want to deal with the mtd -> spi dependency.

Please be patient.

Regards,

Boris

RE: [PATCH v5 0/7] spi: add support for octal mode

[Yogesh Narayan Gaur]

Hi Boris,

Sorry for confusion.

My intention was just to point to the correct patch number only. Earlier you have asked Mark to pick the patch [1] but that patch number was not correct.

[1] https://lkml.org/lkml/2018/12/5/758

--
Regards
Yogesh Gaur

> -----Original Message-----
> From: Boris Brezillon [mailto:boris.brezillon@bootlin.com]
> Sent: Monday, December 10, 2018 1:52 PM
> To: Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com>
> Cc: Mark Brown <broonie@kernel.org>; Vignesh R <vigneshr@ti.com>; linux-
> mtd@lists.infradead.org; marek.vasut@gmail.com; linux-spi@vger.kernel.org;
> devicetree@vger.kernel.org; robh@kernel.org; mark.rutland@arm.com;
> shawnguo@kernel.org; linux-arm-kernel@lists.infradead.org;
> computersforpeace@gmail.com; frieder.schrempf@exceet.de; linux-
> kernel@vger.kernel.org
> Subject: Re: [PATCH v5 0/7] spi: add support for octal mode
> 
> Hi Yogesh,
> 
> On Mon, 10 Dec 2018 04:13:28 +0000
> Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com> wrote:
> 
> > Hi Mark,
> >
> > Patch has been resend [1], this patch is depends on the series of patch[2] and
> this series has been applied by Boris already.
> 
> You're still not asking the right person. Every patches touching things in
> drivers/mtd/ should be taken by me (or another MTD maintainer), and patches
> touching things in drivers/spi/ should be taken by Mark. So, the patch you're
> pointing to should be applied by me. Plus, I told you I would apply it after 4.21-
> rc1 because I don't want to deal with the mtd -> spi dependency.
> 
> Please be patient.
> 
> Regards,
> 
> Boris

Re: [PATCH v5 0/7] spi: add support for octal mode

[Boris Brezillon]

On Mon, 10 Dec 2018 08:39:20 +0000
Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com> wrote:

> Hi Boris,
> 
> Sorry for confusion.
> 
> My intention was just to point to the correct patch number only. Earlier you have asked Mark to pick the patch [1] but that patch number was not correct.

Look at the context in [1] (we have good reasons to reply inline instead
of top-posting). I asked Mark to pick "spi: nxp-fspi: add octal mode
flag bit for octal support", not the m25p80 changes. I was wrong
though, as the patch I pointed to depends on your nxp-fspi patchset
which as not been merged yet.

> 
> [1] https://lkml.org/lkml/2018/12/5/758

Re: [PATCH v5 3/7] mtd: spi-nor: add opcodes for octal Read/Write commands

[Tudor.Ambarus]

Hi, Yogesh,

On 12/03/2018 10:39 AM, Yogesh Narayan Gaur wrote:
> - Add opcodes for octal I/O commands
>   * Read  : 1-1-8 and 1-8-8 protocol
>   * Write : 1-1-8 and 1-8-8 protocol
>   * opcodes for 4-byte address mode command
> 
> - Entry of macros in _convert_3to4_xxx function
> 
> - Add flag specifying flash support octal read commands.
> 
> Signed-off-by: Vignesh R <vigneshr@ti.com>
> Signed-off-by: Yogesh Gaur <yogeshnarayan.gaur@nxp.com>
> ---
> Changes for v5:
> - Modified string 'octo' with 'octal'.
> Changes for v4:
> - None
> Changes for v3:
> - Modified string 'octal' with 'octo'.
> Changes for v2:
> - Incorporated review comments of Boris and Vignesh
> 
>  drivers/mtd/spi-nor/spi-nor.c | 16 ++++++++++++++--
>  include/linux/mtd/spi-nor.h   |  8 ++++++++
>  2 files changed, 22 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
> index 398d273..7a2176d 100644
> --- a/drivers/mtd/spi-nor/spi-nor.c
> +++ b/drivers/mtd/spi-nor/spi-nor.c
> @@ -90,6 +90,7 @@ struct flash_info {
>  #define NO_CHIP_ERASE		BIT(12) /* Chip does not support chip erase */
>  #define SPI_NOR_SKIP_SFDP	BIT(13)	/* Skip parsing of SFDP tables */
>  #define USE_CLSR		BIT(14)	/* use CLSR command */
> +#define SPI_NOR_OCTAL_READ	BIT(15)	/* Flash supports Octal Read */
>  
>  	int	(*quad_enable)(struct spi_nor *nor);
>  };
> @@ -209,6 +210,8 @@ static inline u8 spi_nor_convert_3to4_read(u8 opcode)
>  		{ SPINOR_OP_READ_1_2_2,	SPINOR_OP_READ_1_2_2_4B },
>  		{ SPINOR_OP_READ_1_1_4,	SPINOR_OP_READ_1_1_4_4B },
>  		{ SPINOR_OP_READ_1_4_4,	SPINOR_OP_READ_1_4_4_4B },
> +		{ SPINOR_OP_READ_1_1_8,	SPINOR_OP_READ_1_1_8_4B },
> +		{ SPINOR_OP_READ_1_8_8,	SPINOR_OP_READ_1_8_8_4B },
>  
>  		{ SPINOR_OP_READ_1_1_1_DTR,	SPINOR_OP_READ_1_1_1_DTR_4B },
>  		{ SPINOR_OP_READ_1_2_2_DTR,	SPINOR_OP_READ_1_2_2_DTR_4B },
> @@ -225,6 +228,8 @@ static inline u8 spi_nor_convert_3to4_program(u8 opcode)
>  		{ SPINOR_OP_PP,		SPINOR_OP_PP_4B },
>  		{ SPINOR_OP_PP_1_1_4,	SPINOR_OP_PP_1_1_4_4B },
>  		{ SPINOR_OP_PP_1_4_4,	SPINOR_OP_PP_1_4_4_4B },
> +		{ SPINOR_OP_PP_1_1_8,	SPINOR_OP_PP_1_1_8_4B },
> +		{ SPINOR_OP_PP_1_8_8,	SPINOR_OP_PP_1_8_8_4B },
>  	};
>  
>  	return spi_nor_convert_opcode(opcode, spi_nor_3to4_program,
> @@ -2093,7 +2098,7 @@ enum spi_nor_read_command_index {
>  	SNOR_CMD_READ_4_4_4,
>  	SNOR_CMD_READ_1_4_4_DTR,
>  
> -	/* Octo SPI */
> +	/* Octal SPI */
>  	SNOR_CMD_READ_1_1_8,
>  	SNOR_CMD_READ_1_8_8,
>  	SNOR_CMD_READ_8_8_8,
> @@ -2110,7 +2115,7 @@ enum spi_nor_pp_command_index {
>  	SNOR_CMD_PP_1_4_4,
>  	SNOR_CMD_PP_4_4_4,
>  
> -	/* Octo SPI */
> +	/* Octal SPI */
>  	SNOR_CMD_PP_1_1_8,
>  	SNOR_CMD_PP_1_8_8,
>  	SNOR_CMD_PP_8_8_8,
> @@ -3195,6 +3200,13 @@ static int spi_nor_init_params(struct spi_nor *nor,
>  					  SNOR_PROTO_1_1_4);
>  	}
>  
> +	if (info->flags & SPI_NOR_OCTAL_READ) {
> +		params->hwcaps.mask |= SNOR_HWCAPS_READ_1_1_8;
> +		spi_nor_set_read_settings(&params->reads[SNOR_CMD_READ_1_1_8],
> +					  0, 8, SPINOR_OP_READ_1_1_8,
> +					  SNOR_PROTO_1_1_8);
> +	}
> +>  	/* Page Program settings. */
>  	params->hwcaps.mask |= SNOR_HWCAPS_PP;
>  	spi_nor_set_pp_settings(&params->page_programs[SNOR_CMD_PP],

At the end of spi_nor_init_params we check the conditions for parsing the sfdp.
Shouldn't SPI_NOR_OCTAL_READ trigger the sfdp parsing when SPI_NOR_SKIP_SFDP is
not set?

> diff --git a/include/linux/mtd/spi-nor.h b/include/linux/mtd/spi-nor.h
> index 8b1acf6..019f534 100644
> --- a/include/linux/mtd/spi-nor.h
> +++ b/include/linux/mtd/spi-nor.h
> @@ -50,9 +50,13 @@

Can you please s/octo/octal on these as well:
$  grep -ni octo include/linux/mtd/spi-nor.h
471: * As a matter of performances, it is relevant to use Octo SPI protocols first,
492:#define SNOR_HWCPAS_READ_OCTO		GENMASK(14, 11)
501: * Like (Fast) Read capabilities, Octo/Quad SPI protocols are preferred to the
515:#define SNOR_HWCAPS_PP_OCTO	GENMASK(22, 20)

thanks,
ta

Re: [PATCH v5 3/7] mtd: spi-nor: add opcodes for octal Read/Write commands

[Boris Brezillon]

On Mon, 3 Dec 2018 08:39:18 +0000
Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com> wrote:

> - Add opcodes for octal I/O commands
>   * Read  : 1-1-8 and 1-8-8 protocol
>   * Write : 1-1-8 and 1-8-8 protocol
>   * opcodes for 4-byte address mode command
> 
> - Entry of macros in _convert_3to4_xxx function
> 
> - Add flag specifying flash support octal read commands.
> 
> Signed-off-by: Vignesh R <vigneshr@ti.com>
> Signed-off-by: Yogesh Gaur <yogeshnarayan.gaur@nxp.com>

Looks like the SoB and Author lines do not match

Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com>
vs
Yogesh Gaur <yogeshnarayan.gaur@nxp.com>

Can you find a way to make them match?

Thanks,

Boris

RE: [PATCH v5 3/7] mtd: spi-nor: add opcodes for octal Read/Write commands

[Yogesh Narayan Gaur]

Hi Boris,

> -----Original Message-----
> From: Boris Brezillon [mailto:boris.brezillon@bootlin.com]
> Sent: Monday, December 10, 2018 4:27 PM
> To: Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com>
> Cc: linux-mtd@lists.infradead.org; broonie@kernel.org;
> marek.vasut@gmail.com; vigneshr@ti.com; linux-spi@vger.kernel.org;
> devicetree@vger.kernel.org; robh@kernel.org; mark.rutland@arm.com;
> shawnguo@kernel.org; linux-arm-kernel@lists.infradead.org;
> computersforpeace@gmail.com; frieder.schrempf@exceet.de; linux-
> kernel@vger.kernel.org
> Subject: Re: [PATCH v5 3/7] mtd: spi-nor: add opcodes for octal Read/Write
> commands
> 
> On Mon, 3 Dec 2018 08:39:18 +0000
> Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com> wrote:
> 
> > - Add opcodes for octal I/O commands
> >   * Read  : 1-1-8 and 1-8-8 protocol
> >   * Write : 1-1-8 and 1-8-8 protocol
> >   * opcodes for 4-byte address mode command
> >
> > - Entry of macros in _convert_3to4_xxx function
> >
> > - Add flag specifying flash support octal read commands.
> >
> > Signed-off-by: Vignesh R <vigneshr@ti.com>
> > Signed-off-by: Yogesh Gaur <yogeshnarayan.gaur@nxp.com>
> 
> Looks like the SoB and Author lines do not match
> 
> Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com> vs Yogesh Gaur
> <yogeshnarayan.gaur@nxp.com>
> 
> Can you find a way to make them match?
I am sending the patches with my smtp server of OutlookOffice and in that my user name is "Yogesh Narayan Gaur" and in gitconfig of my Linux machine I set user name as "Yogesh Gaur".
Is it mandatory to have same Author name in SoB and Author lines, if yes I would change the settings in gitconfig file.

> 
> Thanks,
> 
> Boris

Re: [PATCH v5 3/7] mtd: spi-nor: add opcodes for octal Read/Write commands

[Boris Brezillon]

On Mon, 10 Dec 2018 11:17:20 +0000
Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com> wrote:

> Hi Boris,
> 
> > -----Original Message-----
> > From: Boris Brezillon [mailto:boris.brezillon@bootlin.com]
> > Sent: Monday, December 10, 2018 4:27 PM
> > To: Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com>
> > Cc: linux-mtd@lists.infradead.org; broonie@kernel.org;
> > marek.vasut@gmail.com; vigneshr@ti.com; linux-spi@vger.kernel.org;
> > devicetree@vger.kernel.org; robh@kernel.org; mark.rutland@arm.com;
> > shawnguo@kernel.org; linux-arm-kernel@lists.infradead.org;
> > computersforpeace@gmail.com; frieder.schrempf@exceet.de; linux-
> > kernel@vger.kernel.org
> > Subject: Re: [PATCH v5 3/7] mtd: spi-nor: add opcodes for octal Read/Write
> > commands
> > 
> > On Mon, 3 Dec 2018 08:39:18 +0000
> > Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com> wrote:
> >   
> > > - Add opcodes for octal I/O commands
> > >   * Read  : 1-1-8 and 1-8-8 protocol
> > >   * Write : 1-1-8 and 1-8-8 protocol
> > >   * opcodes for 4-byte address mode command
> > >
> > > - Entry of macros in _convert_3to4_xxx function
> > >
> > > - Add flag specifying flash support octal read commands.
> > >
> > > Signed-off-by: Vignesh R <vigneshr@ti.com>
> > > Signed-off-by: Yogesh Gaur <yogeshnarayan.gaur@nxp.com>  
> > 
> > Looks like the SoB and Author lines do not match
> > 
> > Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com> vs Yogesh Gaur
> > <yogeshnarayan.gaur@nxp.com>
> > 
> > Can you find a way to make them match?  
> I am sending the patches with my smtp server of OutlookOffice and in that my user name is "Yogesh Narayan Gaur" and in gitconfig of my Linux machine I set user name as "Yogesh Gaur".
> Is it mandatory to have same Author name in SoB and Author lines, if yes I would change the settings in gitconfig file.

We have scripts that check that the author/committer has its SoB,
depending on how strict the check is, it might complaint that SoB an
author/committer do not match, so yes, please change gitconfig to make
them match.

Thanks,

Boris

RE: [PATCH v5 3/7] mtd: spi-nor: add opcodes for octal Read/Write commands

[Yogesh Narayan Gaur]

Hi,

> -----Original Message-----
> From: Boris Brezillon [mailto:boris.brezillon@bootlin.com]
> Sent: Monday, December 10, 2018 4:57 PM
> To: Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com>
> Cc: linux-mtd@lists.infradead.org; broonie@kernel.org;
> marek.vasut@gmail.com; vigneshr@ti.com; linux-spi@vger.kernel.org;
> devicetree@vger.kernel.org; robh@kernel.org; mark.rutland@arm.com;
> shawnguo@kernel.org; linux-arm-kernel@lists.infradead.org;
> computersforpeace@gmail.com; frieder.schrempf@exceet.de; linux-
> kernel@vger.kernel.org
> Subject: Re: [PATCH v5 3/7] mtd: spi-nor: add opcodes for octal Read/Write
> commands
> 
> On Mon, 10 Dec 2018 11:17:20 +0000
> Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com> wrote:
> 
> > Hi Boris,
> >
> > > -----Original Message-----
> > > From: Boris Brezillon [mailto:boris.brezillon@bootlin.com]
> > > Sent: Monday, December 10, 2018 4:27 PM
> > > To: Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com>
> > > Cc: linux-mtd@lists.infradead.org; broonie@kernel.org;
> > > marek.vasut@gmail.com; vigneshr@ti.com; linux-spi@vger.kernel.org;
> > > devicetree@vger.kernel.org; robh@kernel.org; mark.rutland@arm.com;
> > > shawnguo@kernel.org; linux-arm-kernel@lists.infradead.org;
> > > computersforpeace@gmail.com; frieder.schrempf@exceet.de; linux-
> > > kernel@vger.kernel.org
> > > Subject: Re: [PATCH v5 3/7] mtd: spi-nor: add opcodes for octal
> > > Read/Write commands
> > >
> > > On Mon, 3 Dec 2018 08:39:18 +0000
> > > Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com> wrote:
> > >
> > > > - Add opcodes for octal I/O commands
> > > >   * Read  : 1-1-8 and 1-8-8 protocol
> > > >   * Write : 1-1-8 and 1-8-8 protocol
> > > >   * opcodes for 4-byte address mode command
> > > >
> > > > - Entry of macros in _convert_3to4_xxx function
> > > >
> > > > - Add flag specifying flash support octal read commands.
> > > >
> > > > Signed-off-by: Vignesh R <vigneshr@ti.com>
> > > > Signed-off-by: Yogesh Gaur <yogeshnarayan.gaur@nxp.com>
> > >
> > > Looks like the SoB and Author lines do not match
> > >
> > > Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com> vs Yogesh Gaur
> > > <yogeshnarayan.gaur@nxp.com>
> > >
> > > Can you find a way to make them match?
> > I am sending the patches with my smtp server of OutlookOffice and in that my
> user name is "Yogesh Narayan Gaur" and in gitconfig of my Linux machine I set
> user name as "Yogesh Gaur".
> > Is it mandatory to have same Author name in SoB and Author lines, if yes I
> would change the settings in gitconfig file.
> 
> We have scripts that check that the author/committer has its SoB, depending on
> how strict the check is, it might complaint that SoB an author/committer do not
> match, so yes, please change gitconfig to make them match.
> 
Ok, sure. In all other future patches would modify my Author name.

> Thanks,
> 
> Boris

Re: [PATCH v5 0/7] spi: add support for octal mode

[Mark Brown]

[-- Attachment #1: Type: text/plain, Size: 1276 bytes --]

On Mon, Dec 10, 2018 at 04:13:28AM +0000, Yogesh Narayan Gaur wrote:
> Hi Mark,

Please don't top post, reply in line with needed context.  This allows
readers to readily follow the flow of conversation and understand what
you are talking about and also helps ensure that everything in the
discussion is being addressed.

Please fix your mail client to word wrap within paragraphs at something
substantially less than 80 columns.  Doing this makes your messages much
easier to read and reply to.

> Patch has been resend [1], this patch is depends on the series of patch[2] and this series has been applied by Boris already.

> [1] https://patchwork.ozlabs.org/patch/1010253/

This appears to be an MTD patch?  The subject is "mtd: m25p80: add
support of octal mode I/O transfer".  MTD patches normally go via the
MTD tree which is maintained by a group of people including Boris but
not me.

Please include human readable descriptions of things like commits and
issues being discussed in e-mail in your mails, this makes them much
easier for humans to read especially when they have no internet access.
I do frequently catch up on my mail on flights or while otherwise
travelling so this is even more pressing for me than just being about
making things a bit easier to read.

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 488 bytes --]

RE: [PATCH v5 3/7] mtd: spi-nor: add opcodes for octal Read/Write commands

[Yogesh Narayan Gaur]

Hi Tudor,

> -----Original Message-----
> From: Tudor.Ambarus@microchip.com [mailto:Tudor.Ambarus@microchip.com]
> Sent: Monday, December 10, 2018 4:15 PM
> To: Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com>; linux-
> mtd@lists.infradead.org; boris.brezillon@bootlin.com; broonie@kernel.org;
> marek.vasut@gmail.com; vigneshr@ti.com; linux-spi@vger.kernel.org;
> devicetree@vger.kernel.org
> Cc: robh@kernel.org; mark.rutland@arm.com; shawnguo@kernel.org; linux-
> arm-kernel@lists.infradead.org; computersforpeace@gmail.com;
> frieder.schrempf@exceet.de; linux-kernel@vger.kernel.org
> Subject: Re: [PATCH v5 3/7] mtd: spi-nor: add opcodes for octal Read/Write
> commands
> 
> Hi, Yogesh,
> 
> On 12/03/2018 10:39 AM, Yogesh Narayan Gaur wrote:
> > - Add opcodes for octal I/O commands
> >   * Read  : 1-1-8 and 1-8-8 protocol
> >   * Write : 1-1-8 and 1-8-8 protocol
> >   * opcodes for 4-byte address mode command
> >
> > - Entry of macros in _convert_3to4_xxx function
> >
> > - Add flag specifying flash support octal read commands.
> >
> > Signed-off-by: Vignesh R <vigneshr@ti.com>
> > Signed-off-by: Yogesh Gaur <yogeshnarayan.gaur@nxp.com>
> > ---
> > Changes for v5:
> > - Modified string 'octo' with 'octal'.
> > Changes for v4:
> > - None
> > Changes for v3:
> > - Modified string 'octal' with 'octo'.
> > Changes for v2:
> > - Incorporated review comments of Boris and Vignesh
> >
> >  drivers/mtd/spi-nor/spi-nor.c | 16 ++++++++++++++--
> >  include/linux/mtd/spi-nor.h   |  8 ++++++++
> >  2 files changed, 22 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/mtd/spi-nor/spi-nor.c
> > b/drivers/mtd/spi-nor/spi-nor.c index 398d273..7a2176d 100644
> > --- a/drivers/mtd/spi-nor/spi-nor.c
> > +++ b/drivers/mtd/spi-nor/spi-nor.c
> > @@ -90,6 +90,7 @@ struct flash_info {
> >  #define NO_CHIP_ERASE		BIT(12) /* Chip does not support chip
> erase */
> >  #define SPI_NOR_SKIP_SFDP	BIT(13)	/* Skip parsing of SFDP tables */
> >  #define USE_CLSR		BIT(14)	/* use CLSR command */
> > +#define SPI_NOR_OCTAL_READ	BIT(15)	/* Flash supports Octal Read */
> >
> >  	int	(*quad_enable)(struct spi_nor *nor);
> >  };
> > @@ -209,6 +210,8 @@ static inline u8 spi_nor_convert_3to4_read(u8 opcode)
> >  		{ SPINOR_OP_READ_1_2_2,	SPINOR_OP_READ_1_2_2_4B },
> >  		{ SPINOR_OP_READ_1_1_4,	SPINOR_OP_READ_1_1_4_4B },
> >  		{ SPINOR_OP_READ_1_4_4,	SPINOR_OP_READ_1_4_4_4B },
> > +		{ SPINOR_OP_READ_1_1_8,	SPINOR_OP_READ_1_1_8_4B },
> > +		{ SPINOR_OP_READ_1_8_8,	SPINOR_OP_READ_1_8_8_4B },
> >
> >  		{ SPINOR_OP_READ_1_1_1_DTR,
> 	SPINOR_OP_READ_1_1_1_DTR_4B },
> >  		{ SPINOR_OP_READ_1_2_2_DTR,
> 	SPINOR_OP_READ_1_2_2_DTR_4B },
> > @@ -225,6 +228,8 @@ static inline u8 spi_nor_convert_3to4_program(u8
> opcode)
> >  		{ SPINOR_OP_PP,		SPINOR_OP_PP_4B },
> >  		{ SPINOR_OP_PP_1_1_4,	SPINOR_OP_PP_1_1_4_4B },
> >  		{ SPINOR_OP_PP_1_4_4,	SPINOR_OP_PP_1_4_4_4B },
> > +		{ SPINOR_OP_PP_1_1_8,	SPINOR_OP_PP_1_1_8_4B },
> > +		{ SPINOR_OP_PP_1_8_8,	SPINOR_OP_PP_1_8_8_4B },
> >  	};
> >
> >  	return spi_nor_convert_opcode(opcode, spi_nor_3to4_program, @@
> > -2093,7 +2098,7 @@ enum spi_nor_read_command_index {
> >  	SNOR_CMD_READ_4_4_4,
> >  	SNOR_CMD_READ_1_4_4_DTR,
> >
> > -	/* Octo SPI */
> > +	/* Octal SPI */
> >  	SNOR_CMD_READ_1_1_8,
> >  	SNOR_CMD_READ_1_8_8,
> >  	SNOR_CMD_READ_8_8_8,
> > @@ -2110,7 +2115,7 @@ enum spi_nor_pp_command_index {
> >  	SNOR_CMD_PP_1_4_4,
> >  	SNOR_CMD_PP_4_4_4,
> >
> > -	/* Octo SPI */
> > +	/* Octal SPI */
> >  	SNOR_CMD_PP_1_1_8,
> >  	SNOR_CMD_PP_1_8_8,
> >  	SNOR_CMD_PP_8_8_8,
> > @@ -3195,6 +3200,13 @@ static int spi_nor_init_params(struct spi_nor *nor,
> >  					  SNOR_PROTO_1_1_4);
> >  	}
> >
> > +	if (info->flags & SPI_NOR_OCTAL_READ) {
> > +		params->hwcaps.mask |= SNOR_HWCAPS_READ_1_1_8;
> > +		spi_nor_set_read_settings(&params-
> >reads[SNOR_CMD_READ_1_1_8],
> > +					  0, 8, SPINOR_OP_READ_1_1_8,
> > +					  SNOR_PROTO_1_1_8);
> > +	}
> > +>  	/* Page Program settings. */
> >  	params->hwcaps.mask |= SNOR_HWCAPS_PP;
> >  	spi_nor_set_pp_settings(&params->page_programs[SNOR_CMD_PP],
> 
> At the end of spi_nor_init_params we check the conditions for parsing the sfdp.
> Shouldn't SPI_NOR_OCTAL_READ trigger the sfdp parsing when
> SPI_NOR_SKIP_SFDP is not set?

I guess for now setting only SPI_NOR_OCTAL_READ didn't trigger SFDP parsing as SFDP parsing would start only when we have both of the below condition are true
        if ((info->flags & (SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ)) &&
            !(info->flags & SPI_NOR_SKIP_SFDP)) {
But for case when we have only set SPI_NOR_OCTAL_READ then first condition check would be false and hence SFDP parsing won't occur.

I guess, we needn't to have SFDP parsing only when SPI_NOR_SKIP_SFDP is set.
Thus would going to modify the condition check as below, so that SFDP parsing would also be performed when SPI_NOR_OCTAL_READ is set. Correct?

        if ((info->flags & (SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
             SPI_NOR_OCTAL_READ)) && !(info->flags & SPI_NOR_SKIP_SFDP)) {

--
Regards
Yogesh Gaur

> 
> > diff --git a/include/linux/mtd/spi-nor.h b/include/linux/mtd/spi-nor.h
> > index 8b1acf6..019f534 100644
> > --- a/include/linux/mtd/spi-nor.h
> > +++ b/include/linux/mtd/spi-nor.h
> > @@ -50,9 +50,13 @@
> 
> Can you please s/octo/octal on these as well:
> $  grep -ni octo include/linux/mtd/spi-nor.h
> 471: * As a matter of performances, it is relevant to use Octo SPI protocols first,
> 492:#define SNOR_HWCPAS_READ_OCTO		GENMASK(14, 11)
> 501: * Like (Fast) Read capabilities, Octo/Quad SPI protocols are preferred to
> the
> 515:#define SNOR_HWCAPS_PP_OCTO	GENMASK(22, 20)
> 
> thanks,
> ta

Re: [PATCH v5 3/7] mtd: spi-nor: add opcodes for octal Read/Write commands

[Tudor.Ambarus]

Hi,

On 12/11/2018 06:55 AM, Yogesh Narayan Gaur wrote:
> Thus would going to modify the condition check as below, so that SFDP parsing would also be performed when SPI_NOR_OCTAL_READ is set. Correct?
> 
>         if ((info->flags & (SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
>              SPI_NOR_OCTAL_READ)) && !(info->flags & SPI_NOR_SKIP_SFDP)) {

Yes, this is what I was suggesting. On a second thought, we haven't added yet
support for parsing sfdp to get the octal mode info, so the parsing will be done
gratuitously. Let's drop this change and add it when adding support for parsing
octal mode info from sfdp. I'll prepare a patch for this.

Please rebase on top of spi-nor/next, s/octo/octal in spi-nor.h and correct your
S-o-b tag and you'll have my R-b tag.

Thanks Yogesh,
ta

RE: [PATCH v5 3/7] mtd: spi-nor: add opcodes for octal Read/Write commands

[Yogesh Narayan Gaur]

Hi Tudor,

> -----Original Message-----
> From: Tudor.Ambarus@microchip.com [mailto:Tudor.Ambarus@microchip.com]
> Sent: Tuesday, December 11, 2018 1:40 PM
> To: Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com>; linux-
> mtd@lists.infradead.org; boris.brezillon@bootlin.com; broonie@kernel.org;
> marek.vasut@gmail.com; vigneshr@ti.com; linux-spi@vger.kernel.org;
> devicetree@vger.kernel.org
> Cc: robh@kernel.org; mark.rutland@arm.com; shawnguo@kernel.org; linux-
> arm-kernel@lists.infradead.org; computersforpeace@gmail.com;
> frieder.schrempf@exceet.de; linux-kernel@vger.kernel.org
> Subject: Re: [PATCH v5 3/7] mtd: spi-nor: add opcodes for octal Read/Write
> commands
> 
> Hi,
> 
> On 12/11/2018 06:55 AM, Yogesh Narayan Gaur wrote:
> > Thus would going to modify the condition check as below, so that SFDP
> parsing would also be performed when SPI_NOR_OCTAL_READ is set. Correct?
> >
> >         if ((info->flags & (SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
> >              SPI_NOR_OCTAL_READ)) && !(info->flags &
> > SPI_NOR_SKIP_SFDP)) {
> 
> Yes, this is what I was suggesting. On a second thought, we haven't added yet
> support for parsing sfdp to get the octal mode info, so the parsing will be done
> gratuitously. Let's drop this change and add it when adding support for parsing
> octal mode info from sfdp. I'll prepare a patch for this.
> 
> Please rebase on top of spi-nor/next, s/octo/octal in spi-nor.h and correct your
> S-o-b tag and you'll have my R-b tag.
> 
Next version, v6, sent for review[1].
Sorry for late reply, was on leave.

--
Regards
Yogesh Gaur

[1] https://patchwork.ozlabs.org/project/linux-mtd/list/?series=82815

> Thanks Yogesh,
> ta