From patchwork Wed Apr 12 07:05:19 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Quentin Schulz X-Patchwork-Id: 9676661 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 07C5760383 for ; Wed, 12 Apr 2017 07:06:06 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EE5E42859E for ; Wed, 12 Apr 2017 07:06:05 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E3226285AE; Wed, 12 Apr 2017 07:06:05 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A66142859E for ; Wed, 12 Apr 2017 07:06:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753179AbdDLHGC (ORCPT ); Wed, 12 Apr 2017 03:06:02 -0400 Received: from mail.free-electrons.com ([62.4.15.54]:47261 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752551AbdDLHGC (ORCPT ); Wed, 12 Apr 2017 03:06:02 -0400 Received: by mail.free-electrons.com (Postfix, from userid 110) id 1671A20828; Wed, 12 Apr 2017 09:06:00 +0200 (CEST) Received: from qschulz.lan (LStLambert-657-1-97-87.w90-63.abo.wanadoo.fr [90.63.216.87]) by mail.free-electrons.com (Postfix) with ESMTPSA id D1038207E4; Wed, 12 Apr 2017 09:05:49 +0200 (CEST) From: Quentin Schulz To: nicolas.ferre@microchip.com, broonie@kernel.org Cc: Quentin Schulz , linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org, alexandre.belloni@free-electrons.com, thomas.petazzoni@free-electrons.com Subject: [PATCH 1/2] spi: atmel: factorize reusable code for SPI controller init Date: Wed, 12 Apr 2017 09:05:19 +0200 Message-Id: <20170412070520.29621-1-quentin.schulz@free-electrons.com> X-Mailer: git-send-email 2.9.3 Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The SPI controller configuration during the init can be reused, for the resume function for example. Let's move this configuration to a separate function. Signed-off-by: Quentin Schulz Acked-by: Nicolas Ferre --- drivers/spi/spi-atmel.c | 35 +++++++++++++++++++++-------------- 1 file changed, 21 insertions(+), 14 deletions(-) diff --git a/drivers/spi/spi-atmel.c b/drivers/spi/spi-atmel.c index 0e7712b..247d920 100644 --- a/drivers/spi/spi-atmel.c +++ b/drivers/spi/spi-atmel.c @@ -1464,6 +1464,25 @@ static int atmel_spi_gpio_cs(struct platform_device *pdev) return 0; } +static void atmel_spi_init(struct atmel_spi *as) +{ + spi_writel(as, CR, SPI_BIT(SWRST)); + spi_writel(as, CR, SPI_BIT(SWRST)); /* AT91SAM9263 Rev B workaround */ + if (as->caps.has_wdrbt) { + spi_writel(as, MR, SPI_BIT(WDRBT) | SPI_BIT(MODFDIS) + | SPI_BIT(MSTR)); + } else { + spi_writel(as, MR, SPI_BIT(MSTR) | SPI_BIT(MODFDIS)); + } + + if (as->use_pdc) + spi_writel(as, PTCR, SPI_BIT(RXTDIS) | SPI_BIT(TXTDIS)); + spi_writel(as, CR, SPI_BIT(SPIEN)); + + if (as->fifo_size) + spi_writel(as, CR, SPI_BIT(FIFOEN)); +} + static int atmel_spi_probe(struct platform_device *pdev) { struct resource *regs; @@ -1572,26 +1591,14 @@ static int atmel_spi_probe(struct platform_device *pdev) as->spi_clk = clk_get_rate(clk); - spi_writel(as, CR, SPI_BIT(SWRST)); - spi_writel(as, CR, SPI_BIT(SWRST)); /* AT91SAM9263 Rev B workaround */ - if (as->caps.has_wdrbt) { - spi_writel(as, MR, SPI_BIT(WDRBT) | SPI_BIT(MODFDIS) - | SPI_BIT(MSTR)); - } else { - spi_writel(as, MR, SPI_BIT(MSTR) | SPI_BIT(MODFDIS)); - } - - if (as->use_pdc) - spi_writel(as, PTCR, SPI_BIT(RXTDIS) | SPI_BIT(TXTDIS)); - spi_writel(as, CR, SPI_BIT(SPIEN)); - as->fifo_size = 0; if (!of_property_read_u32(pdev->dev.of_node, "atmel,fifo-size", &as->fifo_size)) { dev_info(&pdev->dev, "Using FIFO (%u data)\n", as->fifo_size); - spi_writel(as, CR, SPI_BIT(FIFOEN)); } + atmel_spi_init(as); + pm_runtime_set_autosuspend_delay(&pdev->dev, AUTOSUSPEND_TIMEOUT); pm_runtime_use_autosuspend(&pdev->dev); pm_runtime_set_active(&pdev->dev);