From patchwork Thu Jan 9 14:00:12 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tero Kristo X-Patchwork-Id: 3460381 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id A9E27C02DC for ; Thu, 9 Jan 2014 14:02:30 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 7353E200DE for ; Thu, 9 Jan 2014 14:02:29 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 8AA0720131 for ; Thu, 9 Jan 2014 14:02:23 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1W1GBI-0008Gd-Ac; Thu, 09 Jan 2014 14:01:56 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1W1GB9-00064p-Ox; Thu, 09 Jan 2014 14:01:47 +0000 Received: from arroyo.ext.ti.com ([192.94.94.40]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1W1GAy-00060c-Mq for linux-arm-kernel@lists.infradead.org; Thu, 09 Jan 2014 14:01:39 +0000 Received: from dflxv15.itg.ti.com ([128.247.5.124]) by arroyo.ext.ti.com (8.13.7/8.13.7) with ESMTP id s09E19f5020543; Thu, 9 Jan 2014 08:01:09 -0600 Received: from DFLE72.ent.ti.com (dfle72.ent.ti.com [128.247.5.109]) by dflxv15.itg.ti.com (8.14.3/8.13.8) with ESMTP id s09E19Gx024285; Thu, 9 Jan 2014 08:01:09 -0600 Received: from dlep32.itg.ti.com (157.170.170.100) by DFLE72.ent.ti.com (128.247.5.109) with Microsoft SMTP Server id 14.2.342.3; Thu, 9 Jan 2014 08:01:08 -0600 Received: from localhost.localdomain (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep32.itg.ti.com (8.14.3/8.13.8) with ESMTP id s09E12W5030058; Thu, 9 Jan 2014 08:01:06 -0600 From: Tero Kristo To: , , , , , , Subject: [PATCHv13 01/40] CLK: TI: add DT alias clock registration mechanism Date: Thu, 9 Jan 2014 16:00:12 +0200 Message-ID: <1389276051-1326-2-git-send-email-t-kristo@ti.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1389276051-1326-1-git-send-email-t-kristo@ti.com> References: <1389276051-1326-1-git-send-email-t-kristo@ti.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140109_090136_948597_2A88BFD8 X-CRM114-Status: GOOD ( 14.88 ) X-Spam-Score: -6.9 (------) Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, 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 Some devices require their clocks to be available with a specific dev-id con-id mapping. With DT, the clocks can be found by default only with their name, or alternatively through the device node of the consumer. With drivers, that don't support DT fully yet, add mechanism to register specific clock names. Signed-off-by: Tero Kristo --- drivers/clk/Makefile | 1 + drivers/clk/ti/Makefile | 3 +++ drivers/clk/ti/clk.c | 55 +++++++++++++++++++++++++++++++++++++++++++++++ include/linux/clk/ti.h | 42 ++++++++++++++++++++++++++++++++++++ 4 files changed, 101 insertions(+) create mode 100644 drivers/clk/ti/Makefile create mode 100644 drivers/clk/ti/clk.c create mode 100644 include/linux/clk/ti.h diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile index 7a10bc9..c61f768 100644 --- a/drivers/clk/Makefile +++ b/drivers/clk/Makefile @@ -35,6 +35,7 @@ obj-$(CONFIG_ARCH_TEGRA) += tegra/ obj-$(CONFIG_PLAT_SAMSUNG) += samsung/ obj-$(CONFIG_COMMON_CLK_XGENE) += clk-xgene.o obj-$(CONFIG_COMMON_CLK_KEYSTONE) += keystone/ +obj-$(CONFIG_ARCH_OMAP) += ti/ obj-$(CONFIG_X86) += x86/ diff --git a/drivers/clk/ti/Makefile b/drivers/clk/ti/Makefile new file mode 100644 index 0000000..1825f7f --- /dev/null +++ b/drivers/clk/ti/Makefile @@ -0,0 +1,3 @@ +ifneq ($(CONFIG_OF),) +obj-y += clk.o +endif diff --git a/drivers/clk/ti/clk.c b/drivers/clk/ti/clk.c new file mode 100644 index 0000000..ef1a7cd --- /dev/null +++ b/drivers/clk/ti/clk.c @@ -0,0 +1,55 @@ +/* + * TI clock support + * + * Copyright (C) 2013 Texas Instruments, Inc. + * + * Tero Kristo + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any + * kind, whether express or implied; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include +#include + +#undef pr_fmt +#define pr_fmt(fmt) "%s: " fmt, __func__ + +/** + * ti_dt_clocks_register - register DT alias clocks during boot + * @oclks: list of clocks to register + * + * Register alias or non-standard DT clock entries during boot. By + * default, DT clocks are found based on their node name. If any + * additional con-id / dev-id -> clock mapping is required, use this + * function to list these. + */ +void __init ti_dt_clocks_register(struct ti_dt_clk oclks[]) +{ + struct ti_dt_clk *c; + struct device_node *node; + struct clk *clk; + struct of_phandle_args clkspec; + + for (c = oclks; c->node_name != NULL; c++) { + node = of_find_node_by_name(NULL, c->node_name); + clkspec.np = node; + clk = of_clk_get_from_provider(&clkspec); + + if (!IS_ERR(clk)) { + c->lk.clk = clk; + clkdev_add(&c->lk); + } else { + pr_warn("failed to lookup clock node %s\n", + c->node_name); + } + } +} diff --git a/include/linux/clk/ti.h b/include/linux/clk/ti.h new file mode 100644 index 0000000..df94c24 --- /dev/null +++ b/include/linux/clk/ti.h @@ -0,0 +1,42 @@ +/* + * TI clock drivers support + * + * Copyright (C) 2013 Texas Instruments, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any + * kind, whether express or implied; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ +#ifndef __LINUX_CLK_TI_H__ +#define __LINUX_CLK_TI_H__ + +#include + +/** + * struct ti_dt_clk - OMAP DT clock alias declarations + * @lk: clock lookup definition + * @node_name: clock DT node to map to + */ +struct ti_dt_clk { + struct clk_lookup lk; + char *node_name; +}; + +#define DT_CLK(dev, con, name) \ + { \ + .lk = { \ + .dev_id = dev, \ + .con_id = con, \ + }, \ + .node_name = name, \ + } + + +void ti_dt_clocks_register(struct ti_dt_clk *oclks); + +#endif