From patchwork Mon Dec 30 18:30:44 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Baruch Siach X-Patchwork-Id: 3420461 Return-Path: X-Original-To: patchwork-linux-spi@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id B52139F374 for ; Mon, 30 Dec 2013 18:31:25 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 3F078200F3 for ; Mon, 30 Dec 2013 18:31:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 697C320107 for ; Mon, 30 Dec 2013 18:31:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756132Ab3L3SbR (ORCPT ); Mon, 30 Dec 2013 13:31:17 -0500 Received: from guitar.tcltek.co.il ([192.115.133.116]:41935 "EHLO mx.tkos.co.il" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755867Ab3L3SbQ (ORCPT ); Mon, 30 Dec 2013 13:31:16 -0500 Received: from tarshish.tkos.co.il (unknown [10.0.8.6]) by mx.tkos.co.il (Postfix) with ESMTPSA id 1CAA9440A2F; Mon, 30 Dec 2013 20:31:11 +0200 (IST) From: Baruch Siach To: Mark Brown Cc: linux-spi@vger.kernel.org, Feng Tang , Jean-Hugues Deschenes , Baruch Siach Subject: [PATCH v2 1/3] spi: dw: use managed resources Date: Mon, 30 Dec 2013 20:30:44 +0200 Message-Id: <9fca9e7e34cd6bd0ec14d28952d422014d94763b.1388427564.git.baruch@tkos.co.il> X-Mailer: git-send-email 1.8.5.2 In-Reply-To: References: Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org X-Spam-Status: No, score=-7.0 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, 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 X-Virus-Scanned: ClamAV using ClamSMTP Migrate mmio code and core driver to managed resources to reduce boilerplate error handling code. Also, handle clk_enable() failure while at it, and drop unused dw_spi iolen field. Cc: Feng Tang Cc: Jean-Hugues Deschenes Signed-off-by: Baruch Siach --- v2: Convert also the PCI code Drop the iolen and parent_dev fields --- drivers/spi/spi-dw-mmio.c | 70 ++++++++++++++--------------------------------- drivers/spi/spi-dw-pci.c | 40 +++++++-------------------- drivers/spi/spi-dw.c | 20 ++++---------- drivers/spi/spi-dw.h | 4 +-- 4 files changed, 37 insertions(+), 97 deletions(-) diff --git a/drivers/spi/spi-dw-mmio.c b/drivers/spi/spi-dw-mmio.c index 168c620..569adf8 100644 --- a/drivers/spi/spi-dw-mmio.c +++ b/drivers/spi/spi-dw-mmio.c @@ -30,14 +30,13 @@ static int dw_spi_mmio_probe(struct platform_device *pdev) { struct dw_spi_mmio *dwsmmio; struct dw_spi *dws; - struct resource *mem, *ioarea; + struct resource *mem; int ret; - dwsmmio = kzalloc(sizeof(struct dw_spi_mmio), GFP_KERNEL); - if (!dwsmmio) { - ret = -ENOMEM; - goto err_end; - } + dwsmmio = devm_kzalloc(&pdev->dev, sizeof(struct dw_spi_mmio), + GFP_KERNEL); + if (!dwsmmio) + return -ENOMEM; dws = &dwsmmio->dws; @@ -45,80 +44,51 @@ static int dw_spi_mmio_probe(struct platform_device *pdev) mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!mem) { dev_err(&pdev->dev, "no mem resource?\n"); - ret = -EINVAL; - goto err_kfree; + return -EINVAL; } - ioarea = request_mem_region(mem->start, resource_size(mem), - pdev->name); - if (!ioarea) { - dev_err(&pdev->dev, "SPI region already claimed\n"); - ret = -EBUSY; - goto err_kfree; - } - - dws->regs = ioremap_nocache(mem->start, resource_size(mem)); - if (!dws->regs) { - dev_err(&pdev->dev, "SPI region already mapped\n"); - ret = -ENOMEM; - goto err_release_reg; + dws->regs = devm_ioremap_resource(&pdev->dev, mem); + if (IS_ERR(dws->regs)) { + dev_err(&pdev->dev, "SPI region map failed\n"); + return PTR_ERR(dws->regs); } dws->irq = platform_get_irq(pdev, 0); if (dws->irq < 0) { dev_err(&pdev->dev, "no irq resource?\n"); - ret = dws->irq; /* -ENXIO */ - goto err_unmap; + return dws->irq; /* -ENXIO */ } - dwsmmio->clk = clk_get(&pdev->dev, NULL); - if (IS_ERR(dwsmmio->clk)) { - ret = PTR_ERR(dwsmmio->clk); - goto err_unmap; - } - clk_enable(dwsmmio->clk); + dwsmmio->clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(dwsmmio->clk)) + return PTR_ERR(dwsmmio->clk); + ret = clk_enable(dwsmmio->clk); + if (ret) + return ret; - dws->parent_dev = &pdev->dev; dws->bus_num = 0; dws->num_cs = 4; dws->max_freq = clk_get_rate(dwsmmio->clk); - ret = dw_spi_add_host(dws); + ret = dw_spi_add_host(&pdev->dev, dws); if (ret) - goto err_clk; + goto out; platform_set_drvdata(pdev, dwsmmio); return 0; -err_clk: +out: clk_disable(dwsmmio->clk); - clk_put(dwsmmio->clk); - dwsmmio->clk = NULL; -err_unmap: - iounmap(dws->regs); -err_release_reg: - release_mem_region(mem->start, resource_size(mem)); -err_kfree: - kfree(dwsmmio); -err_end: return ret; } static int dw_spi_mmio_remove(struct platform_device *pdev) { struct dw_spi_mmio *dwsmmio = platform_get_drvdata(pdev); - struct resource *mem; clk_disable(dwsmmio->clk); - clk_put(dwsmmio->clk); - dwsmmio->clk = NULL; - dw_spi_remove_host(&dwsmmio->dws); - iounmap(dwsmmio->dws.regs); - kfree(dwsmmio); - mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); - release_mem_region(mem->start, resource_size(mem)); return 0; } diff --git a/drivers/spi/spi-dw-pci.c b/drivers/spi/spi-dw-pci.c index 66fa995..760dc00 100644 --- a/drivers/spi/spi-dw-pci.c +++ b/drivers/spi/spi-dw-pci.c @@ -43,35 +43,24 @@ static int spi_pci_probe(struct pci_dev *pdev, dev_info(&pdev->dev, "found PCI SPI controller(ID: %04x:%04x)\n", pdev->vendor, pdev->device); - ret = pci_enable_device(pdev); + ret = pcim_enable_device(pdev); if (ret) return ret; - dwpci = kzalloc(sizeof(struct dw_spi_pci), GFP_KERNEL); - if (!dwpci) { - ret = -ENOMEM; - goto err_disable; - } + dwpci = devm_kzalloc(&pdev-dev, sizeof(struct dw_spi_pci), GFP_KERNEL); + if (!dwpci) + return -ENOMEM; dwpci->pdev = pdev; dws = &dwpci->dws; /* Get basic io resource and map it */ dws->paddr = pci_resource_start(pdev, pci_bar); - dws->iolen = pci_resource_len(pdev, pci_bar); - ret = pci_request_region(pdev, pci_bar, dev_name(&pdev->dev)); + ret = pcim_iomap_regions(pdev, 1, dev_name(&pdev->dev)); if (ret) - goto err_kfree; - - dws->regs = ioremap_nocache((unsigned long)dws->paddr, - pci_resource_len(pdev, pci_bar)); - if (!dws->regs) { - ret = -ENOMEM; - goto err_release_reg; - } + return ret; - dws->parent_dev = &pdev->dev; dws->bus_num = 0; dws->num_cs = 4; dws->irq = pdev->irq; @@ -83,26 +72,17 @@ static int spi_pci_probe(struct pci_dev *pdev, if (pdev->device == 0x0800) { ret = dw_spi_mid_init(dws); if (ret) - goto err_unmap; + return ret; } - ret = dw_spi_add_host(dws); + ret = dw_spi_add_host(&pdev->dev, dws); if (ret) - goto err_unmap; + return ret; /* PCI hook and SPI hook use the same drv data */ pci_set_drvdata(pdev, dwpci); - return 0; -err_unmap: - iounmap(dws->regs); -err_release_reg: - pci_release_region(pdev, pci_bar); -err_kfree: - kfree(dwpci); -err_disable: - pci_disable_device(pdev); - return ret; + return 0; } static void spi_pci_remove(struct pci_dev *pdev) diff --git a/drivers/spi/spi-dw.c b/drivers/spi/spi-dw.c index abf4fd5..48ec161 100644 --- a/drivers/spi/spi-dw.c +++ b/drivers/spi/spi-dw.c @@ -775,18 +775,16 @@ static void spi_hw_init(struct dw_spi *dws) } } -int dw_spi_add_host(struct dw_spi *dws) +int dw_spi_add_host(struct device *dev, struct dw_spi *dws) { struct spi_master *master; int ret; BUG_ON(dws == NULL); - master = spi_alloc_master(dws->parent_dev, 0); - if (!master) { - ret = -ENOMEM; - goto exit; - } + master = spi_alloc_master(dev, 0); + if (!master) + return -ENOMEM; dws->master = master; dws->type = SSI_MOTO_SPI; @@ -796,7 +794,7 @@ int dw_spi_add_host(struct dw_spi *dws) snprintf(dws->name, sizeof(dws->name), "dw_spi%d", dws->bus_num); - ret = request_irq(dws->irq, dw_spi_irq, IRQF_SHARED, + ret = devm_request_irq(dev, dws->irq, dw_spi_irq, IRQF_SHARED, dws->name, dws); if (ret < 0) { dev_err(&master->dev, "can not get IRQ\n"); @@ -835,7 +833,7 @@ int dw_spi_add_host(struct dw_spi *dws) } spi_master_set_devdata(master, dws); - ret = spi_register_master(master); + ret = devm_spi_register_master(dev, master); if (ret) { dev_err(&master->dev, "problem registering spi master\n"); goto err_queue_alloc; @@ -850,10 +848,8 @@ err_queue_alloc: dws->dma_ops->dma_exit(dws); err_diable_hw: spi_enable_chip(dws, 0); - free_irq(dws->irq, dws); err_free_master: spi_master_put(master); -exit: return ret; } EXPORT_SYMBOL_GPL(dw_spi_add_host); @@ -877,10 +873,6 @@ void dw_spi_remove_host(struct dw_spi *dws) spi_enable_chip(dws, 0); /* Disable clk */ spi_set_clk(dws, 0); - free_irq(dws->irq, dws); - - /* Disconnect from the SPI framework */ - spi_unregister_master(dws->master); } EXPORT_SYMBOL_GPL(dw_spi_remove_host); diff --git a/drivers/spi/spi-dw.h b/drivers/spi/spi-dw.h index 5a5cd02..587643d 100644 --- a/drivers/spi/spi-dw.h +++ b/drivers/spi/spi-dw.h @@ -92,13 +92,11 @@ struct dw_spi_dma_ops { struct dw_spi { struct spi_master *master; struct spi_device *cur_dev; - struct device *parent_dev; enum dw_ssi_type type; char name[16]; void __iomem *regs; unsigned long paddr; - u32 iolen; int irq; u32 fifo_len; /* depth of the FIFO buffer */ u32 max_freq; /* max bus freq supported */ @@ -230,7 +228,7 @@ struct dw_spi_chip { void (*cs_control)(u32 command); }; -extern int dw_spi_add_host(struct dw_spi *dws); +extern int dw_spi_add_host(struct device *dev, struct dw_spi *dws); extern void dw_spi_remove_host(struct dw_spi *dws); extern int dw_spi_suspend_host(struct dw_spi *dws); extern int dw_spi_resume_host(struct dw_spi *dws);