From patchwork Thu Aug 28 06:54:23 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Simon Horman X-Patchwork-Id: 4800571 Return-Path: X-Original-To: patchwork-ltsi-dev@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 2DBCBC0338 for ; Thu, 28 Aug 2014 08:46:59 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id DE8A42012E for ; Thu, 28 Aug 2014 08:46:57 +0000 (UTC) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org [140.211.169.12]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id CF0EF20109 for ; Thu, 28 Aug 2014 08:46:56 +0000 (UTC) Received: from mail.linux-foundation.org (localhost [127.0.0.1]) by mail.linuxfoundation.org (Postfix) with ESMTP id 01A59168E; Thu, 28 Aug 2014 07:36:32 +0000 (UTC) X-Original-To: ltsi-dev@lists.linuxfoundation.org Delivered-To: ltsi-dev@mail.linuxfoundation.org Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 2927B158F for ; Thu, 28 Aug 2014 07:35:58 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from kirsty.vergenet.net (kirsty.vergenet.net [202.4.237.240]) by smtp1.linuxfoundation.org (Postfix) with ESMTP id 48AEE201B4 for ; Thu, 28 Aug 2014 07:35:57 +0000 (UTC) Received: from ayumi.isobedori.kobe.vergenet.net (p4222-ipbfp1605kobeminato.hyogo.ocn.ne.jp [114.154.95.222]) by kirsty.vergenet.net (Postfix) with ESMTP id DB1952671CF; Thu, 28 Aug 2014 17:07:46 +1000 (EST) Received: by ayumi.isobedori.kobe.vergenet.net (Postfix, from userid 7100) id 6D1DDEDEAE7; Thu, 28 Aug 2014 16:07:45 +0900 (JST) From: Simon Horman To: ltsi-dev@lists.linuxfoundation.org Date: Thu, 28 Aug 2014 15:54:23 +0900 Message-Id: <1409209620-24487-138-git-send-email-horms+renesas@verge.net.au> X-Mailer: git-send-email 2.0.1 In-Reply-To: <1409209620-24487-1-git-send-email-horms+renesas@verge.net.au> References: <1409209620-24487-1-git-send-email-horms+renesas@verge.net.au> X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org Cc: Magnus Damm Subject: [LTSI-dev] [PATCH LTSI-3.14 137/894] spi: sh-msiof: Use core message handling instead of spi-bitbang X-BeenThere: ltsi-dev@lists.linuxfoundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "A list to discuss patches, development, and other things related to the LTSI project" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: ltsi-dev-bounces@lists.linuxfoundation.org Errors-To: ltsi-dev-bounces@lists.linuxfoundation.org X-Virus-Scanned: ClamAV using ClamSMTP From: Geert Uytterhoeven The only remaining feature of spi-bitbang used by this driver is the chipselect() callback, which just does conditional GPIO. This is handled fine by the SPI core's spi_set_cs(), hence switch the driver to use the core message handling through our own transfer_one() method. As the (optional) GPIO CS is no longer deasserted at spi_master.setup() time (through spi_bitbang_setup() and the spi_bitbang.chipselect() callback), we now have to take care of that ourselves. Remove the call to spi_master_put() in sh_msiof_spi_remove(), as our SPI master is now registered using devm_spi_register_master() (spi_bitbang_start() uses the non-managed version). Signed-off-by: Geert Uytterhoeven Acked-by: Magnus Damm Signed-off-by: Mark Brown (cherry picked from commit 1bd6363bc0c69ff6120b53daa35cf9459c3628ad) Signed-off-by: Simon Horman --- drivers/spi/Kconfig | 1 - drivers/spi/spi-sh-msiof.c | 67 ++++++++++++++-------------------------------- 2 files changed, 20 insertions(+), 48 deletions(-) diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig index 581ee2a..90c6231 100644 --- a/drivers/spi/Kconfig +++ b/drivers/spi/Kconfig @@ -416,7 +416,6 @@ config SPI_SH_MSIOF tristate "SuperH MSIOF SPI controller" depends on HAVE_CLK depends on SUPERH || ARCH_SHMOBILE || COMPILE_TEST - select SPI_BITBANG help SPI driver for SuperH and SH Mobile MSIOF blocks. diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c index e41e78a..1b59804 100644 --- a/drivers/spi/spi-sh-msiof.c +++ b/drivers/spi/spi-sh-msiof.c @@ -26,7 +26,6 @@ #include #include -#include #include @@ -38,7 +37,6 @@ struct sh_msiof_chipdata { }; struct sh_msiof_spi_priv { - struct spi_bitbang bitbang; /* must be first for spi_bitbang.c */ void __iomem *mapbase; struct clk *clk; struct platform_device *pdev; @@ -458,7 +456,10 @@ static int sh_msiof_spi_setup(struct spi_device *spi) !!(spi->mode & SPI_LSB_FIRST), !!(spi->mode & SPI_CS_HIGH)); - return spi_bitbang_setup(spi); + if (spi->cs_gpio >= 0) + gpio_set_value(spi->cs_gpio, !(spi->mode & SPI_CS_HIGH)); + + return 0; } static int sh_msiof_prepare_message(struct spi_master *master, @@ -489,20 +490,6 @@ static int sh_msiof_unprepare_message(struct spi_master *master, return 0; } -static void sh_msiof_spi_chipselect(struct spi_device *spi, int is_on) -{ - int value; - - /* chip select is active low unless SPI_CS_HIGH is set */ - if (spi->mode & SPI_CS_HIGH) - value = (is_on == BITBANG_CS_ACTIVE) ? 1 : 0; - else - value = (is_on == BITBANG_CS_ACTIVE) ? 0 : 1; - - if (spi->cs_gpio >= 0) - gpio_set_value(spi->cs_gpio, value); -} - static int sh_msiof_spi_txrx_once(struct sh_msiof_spi_priv *p, void (*tx_fifo)(struct sh_msiof_spi_priv *, const void *, int, int), @@ -572,9 +559,11 @@ static int sh_msiof_spi_txrx_once(struct sh_msiof_spi_priv *p, return ret; } -static int sh_msiof_spi_txrx(struct spi_device *spi, struct spi_transfer *t) +static int sh_msiof_transfer_one(struct spi_master *master, + struct spi_device *spi, + struct spi_transfer *t) { - struct sh_msiof_spi_priv *p = spi_master_get_devdata(spi->master); + struct sh_msiof_spi_priv *p = spi_master_get_devdata(master); void (*tx_fifo)(struct sh_msiof_spi_priv *, const void *, int, int); void (*rx_fifo)(struct sh_msiof_spi_priv *, void *, int, int); int bits; @@ -655,13 +644,6 @@ static int sh_msiof_spi_txrx(struct spi_device *spi, struct spi_transfer *t) words -= n; } - return bytes_done; -} - -static u32 sh_msiof_spi_txrx_word(struct spi_device *spi, unsigned nsecs, - u32 word, u8 bits) -{ - BUG(); /* unused but needed by bitbang code */ return 0; } @@ -798,7 +780,7 @@ static int sh_msiof_spi_probe(struct platform_device *pdev) if (p->info->rx_fifo_override) p->rx_fifo_size = p->info->rx_fifo_override; - /* init master and bitbang code */ + /* init master code */ master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH; master->mode_bits |= SPI_LSB_FIRST | SPI_3WIRE; master->flags = p->chipdata->master_flags; @@ -806,24 +788,20 @@ static int sh_msiof_spi_probe(struct platform_device *pdev) master->dev.of_node = pdev->dev.of_node; master->num_chipselect = p->info->num_chipselect; master->setup = sh_msiof_spi_setup; - master->cleanup = spi_bitbang_cleanup; master->prepare_message = sh_msiof_prepare_message; master->unprepare_message = sh_msiof_unprepare_message; master->bits_per_word_mask = SPI_BPW_RANGE_MASK(8, 32); + master->transfer_one = sh_msiof_transfer_one; - p->bitbang.master = master; - p->bitbang.chipselect = sh_msiof_spi_chipselect; - p->bitbang.setup_transfer = spi_bitbang_setup_transfer; - p->bitbang.txrx_bufs = sh_msiof_spi_txrx; - p->bitbang.txrx_word[SPI_MODE_0] = sh_msiof_spi_txrx_word; - p->bitbang.txrx_word[SPI_MODE_1] = sh_msiof_spi_txrx_word; - p->bitbang.txrx_word[SPI_MODE_2] = sh_msiof_spi_txrx_word; - p->bitbang.txrx_word[SPI_MODE_3] = sh_msiof_spi_txrx_word; + ret = devm_spi_register_master(&pdev->dev, master); + if (ret < 0) { + dev_err(&pdev->dev, "spi_register_master error.\n"); + goto err2; + } - ret = spi_bitbang_start(&p->bitbang); - if (ret == 0) - return 0; + return 0; + err2: pm_runtime_disable(&pdev->dev); clk_unprepare(p->clk); err1: @@ -834,15 +812,10 @@ static int sh_msiof_spi_probe(struct platform_device *pdev) static int sh_msiof_spi_remove(struct platform_device *pdev) { struct sh_msiof_spi_priv *p = platform_get_drvdata(pdev); - int ret; - ret = spi_bitbang_stop(&p->bitbang); - if (!ret) { - pm_runtime_disable(&pdev->dev); - clk_unprepare(p->clk); - spi_master_put(p->bitbang.master); - } - return ret; + pm_runtime_disable(&pdev->dev); + clk_unprepare(p->clk); + return 0; } static struct platform_device_id spi_driver_ids[] = {