From patchwork Wed Dec 12 11:54:48 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bastian Hecht X-Patchwork-Id: 1865611 Return-Path: X-Original-To: patchwork-linux-sh@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork2.kernel.org (Postfix) with ESMTP id 4153DDF2EE for ; Wed, 12 Dec 2012 11:54:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752825Ab2LLLyv (ORCPT ); Wed, 12 Dec 2012 06:54:51 -0500 Received: from mail-ea0-f174.google.com ([209.85.215.174]:56334 "EHLO mail-ea0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752387Ab2LLLyu (ORCPT ); Wed, 12 Dec 2012 06:54:50 -0500 Received: by mail-ea0-f174.google.com with SMTP id e13so196712eaa.19 for ; Wed, 12 Dec 2012 03:54:49 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to:references; bh=6Hw8351QFKnx/OzA8l7wLRjlDGrYeOeIY1oZS8pp9SE=; b=e7VK+r/V5nymsYmRKd8n6+nxRTXs0p5J0gM+uaSQEPHkkZD4vWNjl9YKI4zYl6fdp3 1U78vtByEPe4OTXA4vtWfK6RloQB7W2EoLloXrvJWfhEbbH6z0DmC/hXzcGasl0gpoj+ 7KPb2Udxqv4lI1ZIX0XbWc563TsxW/i472zb3q7d9+T9u6aWaso8Blk6BCCknFGYVo85 kywOvOViRDyhKZXkLXpg0eD4VZIfU+17KD/98lztqR0eL53uZnm4YJMbWtGFpvxsnPXU 15IWTXDSb6jTUDfuep1MrmIx0YFlnvmvoZMi4mOKJFSE3MeoCkkhgVmGN/jX9qqQ37WP 7lJA== Received: by 10.14.215.194 with SMTP id e42mr2219558eep.32.1355313289358; Wed, 12 Dec 2012 03:54:49 -0800 (PST) Received: from localhost.localdomain (p4FD23602.dip.t-dialin.net. [79.210.54.2]) by mx.google.com with ESMTPS id w3sm55551445eel.17.2012.12.12.03.54.47 (version=TLSv1/SSLv3 cipher=OTHER); Wed, 12 Dec 2012 03:54:48 -0800 (PST) From: Bastian Hecht To: spi-devel-general@lists.sourceforge.net, Grant Likely Cc: "linux-arm-kernel@lists.infradead.org" , linux-sh@vger.kernel.org, Magnus Damm Subject: [PATCH 3/4 v2] spi: sh-msiof: Add device tree parsing to driver Date: Wed, 12 Dec 2012 12:54:48 +0100 Message-Id: <1355313289-29769-3-git-send-email-hechtb+renesas@gmail.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1355313289-29769-1-git-send-email-hechtb+renesas@gmail.com> References: <1355313289-29769-1-git-send-email-hechtb+renesas@gmail.com> Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org From: Bastian Hecht This adds the capability to retrieve setup data from the device tree node. The usage of platform data is still available. Signed-off-by: Bastian Hecht --- v2: - renamed property "chip_select" to "num-cs" - renamed property "tx_fifo_size" to "renesas,tx-fifo-size" - renamed property "rx_fifo_size" to "renesas,rx-fifo-size" drivers/spi/spi-sh-msiof.c | 56 +++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 55 insertions(+), 1 deletion(-) diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c index 96358d0..8b40d08 100644 --- a/drivers/spi/spi-sh-msiof.c +++ b/drivers/spi/spi-sh-msiof.c @@ -20,6 +20,7 @@ #include #include #include +#include #include #include @@ -592,6 +593,37 @@ static u32 sh_msiof_spi_txrx_word(struct spi_device *spi, unsigned nsecs, return 0; } +#ifdef CONFIG_OF +static struct sh_msiof_spi_info *sh_msiof_spi_parse_dt(struct device *dev) +{ + struct sh_msiof_spi_info *info; + struct device_node *np = dev->of_node; + u32 num_cs = 0; + + info = devm_kzalloc(dev, sizeof(struct sh_msiof_spi_info), GFP_KERNEL); + if (!info) { + dev_err(dev, "failed to allocate setup data\n"); + return NULL; + } + + /* Parse the MSIOF properties */ + of_property_read_u32(np, "num-cs", &num_cs); + of_property_read_u32(np, "renesas,tx-fifo-size", + &info->tx_fifo_override); + of_property_read_u32(np, "renesas,rx-fifo-size", + &info->rx_fifo_override); + + info->num_chipselect = num_cs; + + return info; +} +#else +static struct sh_msiof_spi_info *sh_msiof_spi_parse_dt(struct device *dev) +{ + return NULL; +} +#endif + static int sh_msiof_spi_probe(struct platform_device *pdev) { struct resource *r; @@ -610,7 +642,17 @@ static int sh_msiof_spi_probe(struct platform_device *pdev) p = spi_master_get_devdata(master); platform_set_drvdata(pdev, p); - p->info = pdev->dev.platform_data; + if (pdev->dev.of_node) + p->info = sh_msiof_spi_parse_dt(&pdev->dev); + else + p->info = pdev->dev.platform_data; + + if (!p->info) { + dev_err(&pdev->dev, "failed to obtain device info\n"); + ret = -ENXIO; + goto err1; + } + init_completion(&p->done); p->clk = clk_get(&pdev->dev, NULL); @@ -715,6 +757,17 @@ static int sh_msiof_spi_runtime_nop(struct device *dev) return 0; } +#ifdef CONFIG_OF +static const struct of_device_id sh_msiof_match[] = { + { .compatible = "renesas,sh-msiof", }, + { .compatible = "renesas,sh-mobile-msiof", }, + {}, +}; +MODULE_DEVICE_TABLE(of, sh_msiof_match); +#else +#define sh_msiof_match NULL +#endif + static struct dev_pm_ops sh_msiof_spi_dev_pm_ops = { .runtime_suspend = sh_msiof_spi_runtime_nop, .runtime_resume = sh_msiof_spi_runtime_nop, @@ -727,6 +780,7 @@ static struct platform_driver sh_msiof_spi_drv = { .name = "spi_sh_msiof", .owner = THIS_MODULE, .pm = &sh_msiof_spi_dev_pm_ops, + .of_match_table = sh_msiof_match, }, }; module_platform_driver(sh_msiof_spi_drv);