From patchwork Mon Aug 27 23:36:11 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paul Walmsley X-Patchwork-Id: 1378661 Return-Path: X-Original-To: patchwork-linux-omap@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork1.kernel.org (Postfix) with ESMTP id 4DD3140D06 for ; Mon, 27 Aug 2012 23:39:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755058Ab2H0Xi4 (ORCPT ); Mon, 27 Aug 2012 19:38:56 -0400 Received: from utopia.booyaka.com ([74.50.51.50]:37122 "EHLO utopia.booyaka.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755022Ab2H0Xit (ORCPT ); Mon, 27 Aug 2012 19:38:49 -0400 Received: (qmail 15355 invoked by uid 1019); 27 Aug 2012 23:38:47 -0000 MBOX-Line: From nobody Mon Aug 27 17:36:11 2012 Subject: [PATCH 3/5] hwrng: OMAP: convert to use runtime PM To: linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org From: Paul Walmsley Cc: Herbert Xu , Matt Mackall , linux-kernel@vger.kernel.org Date: Mon, 27 Aug 2012 17:36:11 -0600 Message-ID: <20120827233610.15045.10090.stgit@dusk.lan> In-Reply-To: <20120827232922.15045.56522.stgit@dusk.lan> References: <20120827232922.15045.56522.stgit@dusk.lan> User-Agent: StGit/0.16-37-g27ac3 MIME-Version: 1.0 Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org Convert the OMAP onboard hardware RNG driver to use runtime PM. This allows us to remove some OMAP-specific cpu_is_omap*() calls from the RNG driver. Signed-off-by: Paul Walmsley Cc: Matt Mackall Cc: Herbert Xu --- drivers/char/hw_random/omap-rng.c | 35 +++++++++-------------------------- 1 file changed, 9 insertions(+), 26 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/drivers/char/hw_random/omap-rng.c b/drivers/char/hw_random/omap-rng.c index e0f0b98..748fcc8 100644 --- a/drivers/char/hw_random/omap-rng.c +++ b/drivers/char/hw_random/omap-rng.c @@ -18,12 +18,12 @@ #include #include #include -#include #include #include #include #include #include +#include #include @@ -50,12 +50,10 @@ /** * struct omap_rng_private_data - RNG IP block-specific data * @base: virtual address of the beginning of the RNG IP block registers - * @clk: RNG clock * @mem_res: struct resource * for the IP block registers physical memory */ struct omap_rng_private_data { void __iomem *base; - struct clk *clk; struct resource *mem_res; }; @@ -122,17 +120,6 @@ static int __devinit omap_rng_probe(struct platform_device *pdev) omap_rng_ops.priv = (unsigned long)priv; dev_set_drvdata(&pdev->dev, priv); - if (cpu_is_omap24xx()) { - priv->clk = clk_get(&pdev->dev, "ick"); - if (IS_ERR(priv->clk)) { - dev_err(&pdev->dev, "Could not get rng_ick\n"); - ret = PTR_ERR(priv->clk); - return ret; - } else { - clk_enable(priv->clk); - } - } - priv->mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!priv->mem_res) { ret = -ENOENT; @@ -146,6 +133,9 @@ static int __devinit omap_rng_probe(struct platform_device *pdev) } dev_set_drvdata(&pdev->dev, priv); + pm_runtime_enable(&pdev->dev); + pm_runtime_get_sync(&pdev->dev); + ret = hwrng_register(&omap_rng_ops); if (ret) goto err_register; @@ -153,19 +143,14 @@ static int __devinit omap_rng_probe(struct platform_device *pdev) dev_info(&pdev->dev, "OMAP Random Number Generator ver. %02x\n", omap_rng_read_reg(priv, RNG_REV_REG)); - omap_rng_write_reg(priv, RNG_MASK_REG, 0x1); return 0; err_register: priv->base = NULL; + pm_runtime_disable(&pdev->dev); err_ioremap: - if (cpu_is_omap24xx()) { - clk_disable(priv->clk); - clk_put(priv->clk); - } - kfree(priv); return ret; @@ -179,12 +164,8 @@ static int __exit omap_rng_remove(struct platform_device *pdev) omap_rng_write_reg(priv, RNG_MASK_REG, 0x0); - iounmap(priv->base); - - if (cpu_is_omap24xx()) { - clk_disable(priv->clk); - clk_put(priv->clk); - } + pm_runtime_put_sync(&pdev->dev); + pm_runtime_disable(&pdev->dev); release_mem_region(priv->mem_res->start, resource_size(priv->mem_res)); @@ -200,6 +181,7 @@ static int omap_rng_suspend(struct device *dev) struct omap_rng_private_data *priv = dev_get_drvdata(dev); omap_rng_write_reg(priv, RNG_MASK_REG, 0x0); + pm_runtime_put_sync(dev); return 0; } @@ -208,6 +190,7 @@ static int omap_rng_resume(struct device *dev) { struct omap_rng_private_data *priv = dev_get_drvdata(dev); + pm_runtime_get_sync(dev); omap_rng_write_reg(priv, RNG_MASK_REG, 0x1); return 0;