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[50.152.203.145]) by mx.google.com with ESMTPSA id yj2sm61998423pbb.40.2013.06.03.23.39.32 for (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 03 Jun 2013 23:39:34 -0700 (PDT) From: Mike Turquette To: linux-arm-kernel@lists.infradead.org Subject: [PATCH RFC 1/3] clk: omap: introduce clock driver Date: Mon, 3 Jun 2013 23:39:16 -0700 Message-Id: <1370327958-19776-2-git-send-email-mturquette@linaro.org> X-Mailer: git-send-email 1.8.1.2 In-Reply-To: <1370327958-19776-1-git-send-email-mturquette@linaro.org> References: <1370327958-19776-1-git-send-email-mturquette@linaro.org> X-Gm-Message-State: ALoCoQmVOKUAkz0RyA+Pfq0O2LJ8PmXQ1fmxRYPCBCXK8GGZBizO7amzu7MKTcH2aMh0YQGkyI6O X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130604_023956_914542_15FC6D22 X-CRM114-Status: GOOD ( 19.42 ) X-Spam-Score: -1.9 (-) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-1.9 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [209.85.192.175 listed in list.dnswl.org] -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: Nishanth Menon , Joel A Fernandes , Paul Walmsley , Mike Turquette , Benoit Cousson , Tony Lindgren , devicetree-discuss@lists.ozlabs.org, Rajendra , Tero Kristo , linux-omap@vger.kernel.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: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Parses OMAP clock data from DT and registers those clocks with the clock framework. dt_omap_clk_init must be called early during boot for timer initialization so it is exported and called from the existing clock code instead of probing like a real driver. Cc: Benoit Cousson Cc: Rajendra Nayak Cc: Joel A Fernandes Cc: Nishanth Menon Cc: Paul Walmsley Cc: Tony Lindgren Signed-off-by: Mike Turquette --- This driver simply matches the basic bindings (so far). Eventually it would match omap-specific bindings for DPLLs, CLKOUTX2 and strange leaf clocks as well. This doesn't scale well since non-OMAP related clock data (e.g. a pmic or discrete audio codec) will get grouped into this driver if it matches on a basic clock type. Suggestions? drivers/clk/Makefile | 1 + drivers/clk/omap/Makefile | 1 + drivers/clk/omap/clk.c | 55 +++++++++++++++++++++++++++++++++++++++++++++++ include/linux/clk/omap.h | 24 +++++++++++++++++++++ 4 files changed, 81 insertions(+) create mode 100644 drivers/clk/omap/Makefile create mode 100644 drivers/clk/omap/clk.c create mode 100644 include/linux/clk/omap.h diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile index f51b52b..efd4f2a 100644 --- a/drivers/clk/Makefile +++ b/drivers/clk/Makefile @@ -31,6 +31,7 @@ obj-$(CONFIG_ARCH_VT8500) += clk-vt8500.o obj-$(CONFIG_ARCH_ZYNQ) += clk-zynq.o obj-$(CONFIG_ARCH_TEGRA) += tegra/ obj-$(CONFIG_PLAT_SAMSUNG) += samsung/ +obj-$(CONFIG_ARCH_OMAP) += omap/ obj-$(CONFIG_X86) += x86/ diff --git a/drivers/clk/omap/Makefile b/drivers/clk/omap/Makefile new file mode 100644 index 0000000..8195931 --- /dev/null +++ b/drivers/clk/omap/Makefile @@ -0,0 +1 @@ +obj-y += clk.o diff --git a/drivers/clk/omap/clk.c b/drivers/clk/omap/clk.c new file mode 100644 index 0000000..e9e5c95 --- /dev/null +++ b/drivers/clk/omap/clk.c @@ -0,0 +1,55 @@ +/* + * OMAP PRCM clock driver + * + * Copyright (C) 2013 Linaro.org - http://www.linaro.org + * Mike Turquette + * + * 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 +#include +#include + +/* FIXME - should the OMAP PRCM clock driver match generic types? */ +static const struct of_device_id clk_match[] = { + {.compatible = "fixed-clock", .data = of_fixed_clk_setup, }, + {.compatible = "mux-clock", .data = of_mux_clk_setup, }, + {.compatible = "fixed-factor-clock", + .data = of_fixed_factor_clk_setup, }, + {}, +}; + +static int omap_clk_probe(struct platform_device *pdev) +{ + of_clk_init(clk_match); + return 0; +} + +static struct platform_driver omap_clk_driver = { + .probe = omap_clk_probe, + .driver = { + .name = "omap_clk", + .of_match_table = of_match_ptr(clk_match), + }, +}; + +/* FIXME - need to initialize early; skip real driver registration & probe */ +int __init dt_omap_clk_init(void) +{ + return omap_clk_probe(NULL); +} + +MODULE_DESCRIPTION("OMAP Clock driver"); +MODULE_AUTHOR("Texas Instruments Inc."); +MODULE_LICENSE("GPL v2"); diff --git a/include/linux/clk/omap.h b/include/linux/clk/omap.h new file mode 100644 index 0000000..504e838 --- /dev/null +++ b/include/linux/clk/omap.h @@ -0,0 +1,24 @@ +/* + * Copyright (C) 2010 Broadcom + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#ifndef __LINUX_CLK_OMAP_H_ +#define __LINUX_CLK_OMAP_H_ + +int __init dt_omap_clk_init(void); + +#endif