From patchwork Thu May 21 11:23:49 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yicong Yang X-Patchwork-Id: 11562749 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 682FD60D for ; Thu, 21 May 2020 11:24:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5B2552083E for ; Thu, 21 May 2020 11:24:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728414AbgEULYU (ORCPT ); Thu, 21 May 2020 07:24:20 -0400 Received: from szxga07-in.huawei.com ([45.249.212.35]:47468 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728887AbgEULYU (ORCPT ); Thu, 21 May 2020 07:24:20 -0400 Received: from DGGEMS403-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id F079B301C4E315FE73B4; Thu, 21 May 2020 19:24:17 +0800 (CST) Received: from localhost.localdomain (10.67.165.24) by DGGEMS403-HUB.china.huawei.com (10.3.19.203) with Microsoft SMTP Server id 14.3.487.0; Thu, 21 May 2020 19:24:07 +0800 From: Yicong Yang To: , , , CC: , , , Subject: [RFC PATCH 1/3] spi: spi-mem: add optional prepare/unprepare methods in spi_controller_mem_ops Date: Thu, 21 May 2020 19:23:49 +0800 Message-ID: <1590060231-23242-2-git-send-email-yangyicong@hisilicon.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1590060231-23242-1-git-send-email-yangyicong@hisilicon.com> References: <1590060231-23242-1-git-send-email-yangyicong@hisilicon.com> MIME-Version: 1.0 X-Originating-IP: [10.67.165.24] X-CFilter-Loop: Reflected Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org Some prepare/unprepare works may be necessary before/after a set of operations of the spimem device. For example, before/after spi-nor flash's read/write/erase/lock/unlock. Add optional prepare/unprepare methods in spi_controller_mem_ops to allow the controller to do specific works after/before the operations. The upper user can use spi_mem_{prepare, unprepare}() to call the methods of the controller. Signed-off-by: Yicong Yang --- drivers/spi/spi-mem.c | 20 ++++++++++++++++++++ include/linux/spi/spi-mem.h | 11 +++++++++++ 2 files changed, 31 insertions(+) diff --git a/drivers/spi/spi-mem.c b/drivers/spi/spi-mem.c index adaa0c4..f09cef1 100644 --- a/drivers/spi/spi-mem.c +++ b/drivers/spi/spi-mem.c @@ -220,6 +220,26 @@ bool spi_mem_supports_op(struct spi_mem *mem, const struct spi_mem_op *op) } EXPORT_SYMBOL_GPL(spi_mem_supports_op); +int spi_mem_prepare(struct spi_mem *mem) +{ + struct spi_controller *ctlr = mem->spi->controller; + + if (ctlr->mem_ops && ctlr->mem_ops->prepare) + return ctlr->mem_ops->prepare(mem); + + return 0; +} +EXPORT_SYMBOL_GPL(spi_mem_prepare); + +void spi_mem_unprepare(struct spi_mem *mem) +{ + struct spi_controller *ctlr = mem->spi->controller; + + if (ctlr->mem_ops && ctlr->mem_ops->unprepare) + ctlr->mem_ops->unprepare(mem); +} +EXPORT_SYMBOL_GPL(spi_mem_unprepare); + static int spi_mem_access_start(struct spi_mem *mem) { struct spi_controller *ctlr = mem->spi->controller; diff --git a/include/linux/spi/spi-mem.h b/include/linux/spi/spi-mem.h index af9ff2f..e40b5c3 100644 --- a/include/linux/spi/spi-mem.h +++ b/include/linux/spi/spi-mem.h @@ -215,6 +215,12 @@ static inline void *spi_mem_get_drvdata(struct spi_mem *mem) * limitations) * @supports_op: check if an operation is supported by the controller * @exec_op: execute a SPI memory operation + * @prepare: do some prepare works before a set of operations. for example, + * read/write/erase/lock/unlock operations of spi-nor flash. This + * method is optional. + * @unprepare: do some post works after a set of operations. for example, + * read/write/erase/lock/unlock operations of spi-nor flash. This + * method is optional. * @get_name: get a custom name for the SPI mem device from the controller. * This might be needed if the controller driver has been ported * to use the SPI mem layer and a custom name is used to keep @@ -253,6 +259,8 @@ struct spi_controller_mem_ops { int (*adjust_op_size)(struct spi_mem *mem, struct spi_mem_op *op); bool (*supports_op)(struct spi_mem *mem, const struct spi_mem_op *op); + int (*prepare)(struct spi_mem *mem); + void (*unprepare)(struct spi_mem *mem); int (*exec_op)(struct spi_mem *mem, const struct spi_mem_op *op); const char *(*get_name)(struct spi_mem *mem); @@ -329,6 +337,9 @@ int spi_mem_adjust_op_size(struct spi_mem *mem, struct spi_mem_op *op); bool spi_mem_supports_op(struct spi_mem *mem, const struct spi_mem_op *op); +int spi_mem_prepare(struct spi_mem *mem); +void spi_mem_unprepare(struct spi_mem *mem); + int spi_mem_exec_op(struct spi_mem *mem, const struct spi_mem_op *op);