From patchwork Tue Nov 24 23:36:48 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Murali Karicheri X-Patchwork-Id: 62640 Received: from vger.kernel.org (vger.kernel.org [209.132.176.167]) by demeter.kernel.org (8.14.2/8.14.2) with ESMTP id nAONasY9006579 for ; Tue, 24 Nov 2009 23:36:54 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934445AbZKXXgp (ORCPT ); Tue, 24 Nov 2009 18:36:45 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S934434AbZKXXgp (ORCPT ); Tue, 24 Nov 2009 18:36:45 -0500 Received: from bear.ext.ti.com ([192.94.94.41]:59755 "EHLO bear.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934380AbZKXXgo (ORCPT ); Tue, 24 Nov 2009 18:36:44 -0500 Received: from dlep35.itg.ti.com ([157.170.170.118]) by bear.ext.ti.com (8.13.7/8.13.7) with ESMTP id nAONaoUG001470 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Tue, 24 Nov 2009 17:36:50 -0600 Received: from legion.dal.design.ti.com (localhost [127.0.0.1]) by dlep35.itg.ti.com (8.13.7/8.13.7) with ESMTP id nAONaoKQ023629; Tue, 24 Nov 2009 17:36:50 -0600 (CST) Received: from gt516km11.gt.design.ti.com (gt516km11.gt.design.ti.com [158.218.100.179]) by legion.dal.design.ti.com (8.11.7p1+Sun/8.11.7) with ESMTP id nAONanZ15019; Tue, 24 Nov 2009 17:36:49 -0600 (CST) Received: from gt516km11.gt.design.ti.com (localhost.localdomain [127.0.0.1]) by gt516km11.gt.design.ti.com (8.13.1/8.13.1) with ESMTP id nAONanmv022066; Tue, 24 Nov 2009 18:36:49 -0500 Received: (from a0868495@localhost) by gt516km11.gt.design.ti.com (8.13.1/8.13.1/Submit) id nAONanTt022063; Tue, 24 Nov 2009 18:36:49 -0500 From: m-karicheri2@ti.com To: linux-media@vger.kernel.org, hverkuil@xs4all.nl, khilman@deeprootsystems.com Cc: davinci-linux-open-source@linux.davincidsp.com, Muralidharan Karicheri Subject: [PATCH - v0 1/2] V4L - vpfe capture - make clocks configurable Date: Tue, 24 Nov 2009 18:36:48 -0500 Message-Id: <1259105809-22041-1-git-send-email-m-karicheri2@ti.com> X-Mailer: git-send-email 1.6.0.4 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org diff --git a/drivers/media/video/davinci/vpfe_capture.c b/drivers/media/video/davinci/vpfe_capture.c index cad60e3..1ba9d07 100644 --- a/drivers/media/video/davinci/vpfe_capture.c +++ b/drivers/media/video/davinci/vpfe_capture.c @@ -1743,61 +1743,87 @@ static struct vpfe_device *vpfe_initialize(void) return vpfe_dev; } +/** + * vpfe_disable_clock() - Disable clocks for vpfe capture driver + * @vpfe_dev - ptr to vpfe capture device + * + * Disables clocks defined in vpfe configuration. + */ static void vpfe_disable_clock(struct vpfe_device *vpfe_dev) { struct vpfe_config *vpfe_cfg = vpfe_dev->cfg; + int i; - clk_disable(vpfe_cfg->vpssclk); - clk_put(vpfe_cfg->vpssclk); - clk_disable(vpfe_cfg->slaveclk); - clk_put(vpfe_cfg->slaveclk); - v4l2_info(vpfe_dev->pdev->driver, - "vpfe vpss master & slave clocks disabled\n"); + for (i = 0; i < vpfe_cfg->num_clocks; i++) { + clk_disable(vpfe_dev->clks[i]); + clk_put(vpfe_dev->clks[i]); + } + kfree(vpfe_dev->clks); + v4l2_info(vpfe_dev->pdev->driver, "vpfe capture clocks disabled\n"); } +/** + * vpfe_enable_clock() - Enable clocks for vpfe capture driver + * @vpfe_dev - ptr to vpfe capture device + * + * Enables clocks defined in vpfe configuration. The function + * assumes that at least one clock is to be defined which is + * true as of now. re-visit this if this assumption is not true + */ static int vpfe_enable_clock(struct vpfe_device *vpfe_dev) { struct vpfe_config *vpfe_cfg = vpfe_dev->cfg; - int ret = -ENOENT; + int ret = -EFAULT, i; - vpfe_cfg->vpssclk = clk_get(vpfe_dev->pdev, "vpss_master"); - if (NULL == vpfe_cfg->vpssclk) { - v4l2_err(vpfe_dev->pdev->driver, "No clock defined for" - "vpss_master\n"); - return ret; - } + if (!vpfe_cfg->num_clocks) + return 0; - if (clk_enable(vpfe_cfg->vpssclk)) { - v4l2_err(vpfe_dev->pdev->driver, - "vpfe vpss master clock not enabled\n"); - goto out; - } - v4l2_info(vpfe_dev->pdev->driver, - "vpfe vpss master clock enabled\n"); + vpfe_dev->clks = kzalloc(vpfe_cfg->num_clocks * + sizeof(struct clock *), GFP_KERNEL); - vpfe_cfg->slaveclk = clk_get(vpfe_dev->pdev, "vpss_slave"); - if (NULL == vpfe_cfg->slaveclk) { - v4l2_err(vpfe_dev->pdev->driver, - "No clock defined for vpss slave\n"); - goto out; + if (NULL == vpfe_dev->clks) { + v4l2_err(vpfe_dev->pdev->driver, "Memory allocation failed\n"); + return -ENOMEM; } - if (clk_enable(vpfe_cfg->slaveclk)) { - v4l2_err(vpfe_dev->pdev->driver, - "vpfe vpss slave clock not enabled\n"); - goto out; + for (i = 0; i < vpfe_cfg->num_clocks; i++) { + if (NULL == vpfe_cfg->clocks[i]) { + v4l2_err(vpfe_dev->pdev->driver, + "clock %s is not defined in vpfe config\n", + vpfe_cfg->clocks[i]); + goto out; + } + + vpfe_dev->clks[i] = clk_get(vpfe_dev->pdev, + vpfe_cfg->clocks[i]); + if (NULL == vpfe_dev->clks[i]) { + v4l2_err(vpfe_dev->pdev->driver, + "Failed to get clock %s\n", + vpfe_cfg->clocks[i]); + goto out; + } + + if (clk_enable(vpfe_dev->clks[i])) { + v4l2_err(vpfe_dev->pdev->driver, + "vpfe clock %s not enabled\n", + vpfe_cfg->clocks[i]); + goto out; + } + + v4l2_info(vpfe_dev->pdev->driver, "vpss clock %s enabled", + vpfe_cfg->clocks[i]); } - v4l2_info(vpfe_dev->pdev->driver, "vpfe vpss slave clock enabled\n"); return 0; out: - if (vpfe_cfg->vpssclk) - clk_put(vpfe_cfg->vpssclk); - if (vpfe_cfg->slaveclk) - clk_put(vpfe_cfg->slaveclk); - - return -1; + for (i = 0; i < vpfe_cfg->num_clocks; i++) { + if (vpfe_dev->clks[i]) + clk_put(vpfe_dev->clks[i]); + } + kfree(vpfe_dev->clks); + return ret; } + /* * vpfe_probe : This function creates device entries by register * itself to the V4L2 driver and initializes fields of each diff --git a/include/media/davinci/vpfe_capture.h b/include/media/davinci/vpfe_capture.h index 71d8982..d669e85 100644 --- a/include/media/davinci/vpfe_capture.h +++ b/include/media/davinci/vpfe_capture.h @@ -31,8 +31,6 @@ #include #include -#define VPFE_CAPTURE_NUM_DECODERS 5 - /* Macros */ #define VPFE_MAJOR_RELEASE 0 #define VPFE_MINOR_RELEASE 0 @@ -89,9 +87,14 @@ struct vpfe_config { char *card_name; /* ccdc name */ char *ccdc; - /* vpfe clock */ + /* vpfe clock. Obsolete! Will be removed in next patch */ struct clk *vpssclk; + /* Obsolete! Will be removed in next patch */ struct clk *slaveclk; + /* number of clocks */ + int num_clocks; + /* clocks used for vpfe capture */ + char *clocks[]; }; struct vpfe_device { @@ -102,6 +105,8 @@ struct vpfe_device { struct v4l2_subdev **sd; /* vpfe cfg */ struct vpfe_config *cfg; + /* clock ptrs for vpfe capture */ + struct clk **clks; /* V4l2 device */ struct v4l2_device v4l2_dev; /* parent device */