From mboxrd@z Thu Jan 1 00:00:00 1970 From: Boris Brezillon Subject: [PATCH v3 0/9] spi: Extend the framework to generically support memory devices Date: Sun, 22 Apr 2018 20:35:13 +0200 Message-ID: <20180422183522.11118-1-boris.brezillon@bootlin.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: Yogesh Gaur , Vignesh R , Kamal Dasu , Maxime Chevallier , Peter Pan , Frieder Schrempf , =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= To: David Woodhouse , Brian Norris , Boris Brezillon , Marek Vasut , Richard Weinberger , Cyrille Pitchen , linux-mtd@lists.infradead.org, Miquel Raynal , Mark Brown , linux-spi@vger.kernel.org Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-mtd" Errors-To: linux-mtd-bounces+gldm-linux-mtd-36=gmane.org@lists.infradead.org List-Id: linux-spi.vger.kernel.org Hello, Shrinking a bit the explanation on why the spi-mem abstraction is needed (a detailed explanation is available here [2]). In addition to what as been said in my initial explanation I'll add that making it part of the SPI framework instead of as an extra independent layer is justified by the fact that some controllers support both SPI memory operations and regular SPI transfers, and it's cleaner to have both features exposed through a single driver. For those who want to have the full picture, here is a branch [1] containing the SPI NAND framework based on top of this spi-mem layer. Thanks, Boris [1]https://github.com/bbrezillon/linux/tree/spi-mem [2]https://www.spinics.net/lists/linux-spi/msg12058.html Boris Brezillon (9): spi: Expose spi_{map,unmap}_buf() for internal use spi: Add an helper to flush the message queue spi: Extend the core to ease integration of SPI memory controllers spi: Make support for regular transfers optional when ->mem_ops != NULL spi: bcm-qspi: Implement the spi_mem interface spi: bcm53xx: Implement the spi_mem interface spi: ti-qspi: Implement the spi_mem interface mtd: spi-nor: Use the spi_mem_xx() API spi: Get rid of the spi_flash_read() API drivers/mtd/devices/Kconfig | 1 + drivers/mtd/devices/m25p80.c | 236 +++++++++---------------- drivers/spi/Kconfig | 7 + drivers/spi/Makefile | 1 + drivers/spi/internals.h | 43 +++++ drivers/spi/spi-bcm-qspi.c | 162 ++++++++--------- drivers/spi/spi-bcm53xx.c | 37 ++-- drivers/spi/spi-mem.c | 410 +++++++++++++++++++++++++++++++++++++++++++ drivers/spi/spi-ti-qspi.c | 85 +++++---- drivers/spi/spi.c | 131 ++++++-------- include/linux/spi/spi-mem.h | 249 ++++++++++++++++++++++++++ include/linux/spi/spi.h | 60 +------ 12 files changed, 1007 insertions(+), 415 deletions(-) create mode 100644 drivers/spi/internals.h create mode 100644 drivers/spi/spi-mem.c create mode 100644 include/linux/spi/spi-mem.h -- 2.14.1 ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/