From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754251Ab3A2Ebq (ORCPT ); Mon, 28 Jan 2013 23:31:46 -0500 Received: from opensource.wolfsonmicro.com ([80.75.67.52]:44038 "EHLO opensource.wolfsonmicro.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753323Ab3A2Ebo (ORCPT ); Mon, 28 Jan 2013 23:31:44 -0500 From: Mark Brown To: linux-kernel@vger.kernel.org Cc: Stephen Boyd , Mark Brown Subject: [PATCH 2/2] regmap: spi: Support asynchronous I/O for SPI Date: Tue, 29 Jan 2013 12:31:33 +0800 Message-Id: <1359433894-28154-2-git-send-email-broonie@opensource.wolfsonmicro.com> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1359433894-28154-1-git-send-email-broonie@opensource.wolfsonmicro.com> References: <1359433894-28154-1-git-send-email-broonie@opensource.wolfsonmicro.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Signed-off-by: Mark Brown --- drivers/base/regmap/regmap-spi.c | 52 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) diff --git a/drivers/base/regmap/regmap-spi.c b/drivers/base/regmap/regmap-spi.c index ffa46a9..913274b 100644 --- a/drivers/base/regmap/regmap-spi.c +++ b/drivers/base/regmap/regmap-spi.c @@ -15,6 +15,21 @@ #include #include +#include "internal.h" + +struct regmap_async_spi { + struct regmap_async core; + struct spi_message m; + struct spi_transfer t[2]; +}; + +static void regmap_spi_complete(void *data) +{ + struct regmap_async_spi *async = data; + + regmap_async_complete_cb(&async->core, async->m.status); +} + static int regmap_spi_write(void *context, const void *data, size_t count) { struct device *dev = context; @@ -40,6 +55,41 @@ static int regmap_spi_gather_write(void *context, return spi_sync(spi, &m); } +static int regmap_spi_async_write(void *context, + const void *reg, size_t reg_len, + const void *val, size_t val_len, + struct regmap_async *a) +{ + struct regmap_async_spi *async = container_of(a, + struct regmap_async_spi, + core); + struct device *dev = context; + struct spi_device *spi = to_spi_device(dev); + + async->t[0].tx_buf = reg; + async->t[0].len = reg_len; + async->t[1].tx_buf = val; + async->t[1].len = val_len; + + spi_message_init(&async->m); + spi_message_add_tail(&async->t[0], &async->m); + spi_message_add_tail(&async->t[1], &async->m); + + async->m.complete = regmap_spi_complete; + async->m.context = async; + + return spi_async(spi, &async->m); +} + +static struct regmap_async *regmap_spi_async_alloc(void) +{ + struct regmap_async_spi *async_spi; + + async_spi = kzalloc(sizeof(*async_spi), GFP_KERNEL); + + return &async_spi->core; +} + static int regmap_spi_read(void *context, const void *reg, size_t reg_size, void *val, size_t val_size) @@ -53,6 +103,8 @@ static int regmap_spi_read(void *context, static struct regmap_bus regmap_spi = { .write = regmap_spi_write, .gather_write = regmap_spi_gather_write, + .async_write = regmap_spi_async_write, + .async_alloc = regmap_spi_async_alloc, .read = regmap_spi_read, .read_flag_mask = 0x80, }; -- 1.7.10.4