kernel/include/linux/mtd/spi-nor.h, branch linux-4.1.y

mtd: spi-nor: factor out replace-able flash_{lock,unlock}

2015-03-27T17:37:38Z

Flash lock/unlock is a flash-specific operations. Factor out a callback for it to more readily support other vendors. Signed-off-by: Brian Norris Tested-by: VIET NGA DAO

mtd: spi-nor: Add quad I/O support for Micron SPI NOR

2015-01-07T19:33:22Z

This patch adds code which enables Quad I/O mode on Micron SPI NOR flashes. For Micron SPI NOR flash, enabling or disabling quad I/O protocol can be done By two methods, which are to use EVCR (Enhanced Volatile Configuration Register) and the ENTER QUAD I/O MODE command. There is no difference between these two methods. Unfortunately, for some Micron SPI NOR flashes, there no ENTER Quad I/O command (35h), such as n25q064. But for all current Micron SPI NOR, if it support quad I/O mode, using EVCR definitely be supported. It is a recommended method to enable Quad I/O mode by EVCR, Quad I/O protocol bit 7. When EVCR bit 7 is reset to 0, the SPI NOR flash will operate in quad I/O mode. This patch has been tested on N25Q512A and MT25TL256BAA1ESF. Micron SPI NOR of spi_nor_ids[] table all support this method. Signed-off-by: Bean Huo Acked-by: Marek Vasut Signed-off-by: Brian Norris

mtd: spi-nor: drop replaceable wait-till-ready function pointer

2014-11-05T10:08:21Z

We don't need to expose a 'wait-till-ready' interface to drivers. Status register polling should be handled by the core spi-nor.c library, and as of now, I see no need to provide a special driver-specific hook for it. Signed-off-by: Brian Norris Reviewed-by: Marek Vasut

mtd: m25p80: drop wait-till-ready checks

2014-11-05T10:08:20Z

spi-nor.c should be taking care of these now. Signed-off-by: Brian Norris Reviewed-by: Marek Vasut

spi-nor: Remove spi_nor::read_id operation

2014-10-22T05:29:10Z

There is currently no useful way to override the default implementation of this operation. The returned struct spi_device_id must have a pointer to struct flash_info in its private data, but this structure is defined inside spi-nor. Signed-off-by: Ben Hutchings Signed-off-by: Brian Norris

mtd: m25p80,spi-nor: Fix module aliases for m25p80

2014-10-21T20:46:03Z

m25p80's device ID table is now spi_nor_ids, defined in spi-nor. The MODULE_DEVICE_TABLE() macro doesn't work with extern definitions, but its use was also removed at the same time. Now if m25p80 is built as a module it doesn't get the necessary aliases to be loaded automatically. A clean solution to this will involve defining the list of device IDs in spi-nor.h and removing struct spi_device_id from the spi-nor API, but this is quite a large change. As a quick fix suitable for stable, copy the device IDs back into m25p80. Fixes: 03e296f613af ("mtd: m25p80: use the SPI nor framework") Cc: # 3.16.x: 32f1b7c8352f: mtd: move support for struct flash_platform_data into m25p80 Cc: # 3.16.x: 90e55b3812a1: mtd: m25p80: get rid of spi_get_device_id Cc: # 3.16.x: 70f3ce0510af: mtd: spi-nor: make spi_nor_scan() take a chip type name, not spi_device_id Cc: # 3.16.x Signed-off-by: Ben Hutchings Signed-off-by: Brian Norris

mtd: spi-nor: make spi_nor_scan() take a chip type name, not spi_device_id

2014-10-17T16:29:21Z

Drivers currently call spi_nor_match_id() and then spi_nor_scan(). This adds a dependency on struct spi_device_id which we want to avoid. Make spi_nor_scan() do it for them. Signed-off-by: Ben Hutchings Signed-off-by: Rafał Miłecki Signed-off-by: Brian Norris

mtd: spi-nor: add support for flag status register on Micron chips

2014-07-12T02:10:35Z

Some new Micron flash chips require reading the flag status register to determine when operations have completed. Furthermore, chips with multi-die stacks of the 65nm 256Mb QSPI also require reading the status register before reading the flag status register. This patch adds support for the flag status register in the n25q512ax3 and n25q00 Micron QSPI flash chips. Signed-off-by: Graham Moore Signed-off-by: Brian Norris

mtd: spi-nor: unify read opcode variants with ST SPI FSM

2014-04-14T18:23:00Z

serial_flash_cmds.h defines our opcodes a little differently. Let's borrow its naming, since it's borrowed from the SFDP standard, and it's more extensible. This prepares us for merging serial_flash_cmds.h and spi-nor.h opcode listing. Signed-off-by: Brian Norris Reviewed-by: Marek Vasut Acked-by: Huang Shijie

mtd: spi-nor: re-name OPCODE_* to SPINOR_OP_*

2014-04-14T18:23:00Z

Qualify these with a better namespace, and prepare them for use in more drivers. Signed-off-by: Brian Norris Reviewed-by: Marek Vasut Acked-by: Huang Shijie