From patchwork Tue Sep 25 07:02:05 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sascha Hauer X-Patchwork-Id: 1502491 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by patchwork1.kernel.org (Postfix) with ESMTP id 28A913FE65 for ; Tue, 25 Sep 2012 07:04:10 +0000 (UTC) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1TGPA1-0000iL-GY; Tue, 25 Sep 2012 07:02:25 +0000 Received: from metis.ext.pengutronix.de ([2001:6f8:1178:4:290:27ff:fe1d:cc33]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1TGP9m-0000hD-6Q for linux-arm-kernel@lists.infradead.org; Tue, 25 Sep 2012 07:02:11 +0000 Received: from dude.hi.pengutronix.de ([2001:6f8:1178:2:21e:67ff:fe11:9c5c]) by metis.ext.pengutronix.de with esmtp (Exim 4.72) (envelope-from ) id 1TGP9j-0007eG-V2; Tue, 25 Sep 2012 09:02:07 +0200 Received: from sha by dude.hi.pengutronix.de with local (Exim 4.80) (envelope-from ) id 1TGP9j-0002DE-KC; Tue, 25 Sep 2012 09:02:07 +0200 From: Sascha Hauer To: Subject: [PATCH 1/2] ARM i.MX25: Add devicetree support Date: Tue, 25 Sep 2012 09:02:05 +0200 Message-Id: <1348556526-9174-2-git-send-email-s.hauer@pengutronix.de> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1348556526-9174-1-git-send-email-s.hauer@pengutronix.de> References: <1348556526-9174-1-git-send-email-s.hauer@pengutronix.de> X-SA-Exim-Connect-IP: 2001:6f8:1178:2:21e:67ff:fe11:9c5c X-SA-Exim-Mail-From: sha@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-arm-kernel@lists.infradead.org X-Spam-Note: CRM114 invocation failed X-Spam-Score: -2.7 (--) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-2.7 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.8 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: Sascha Hauer , Shawn Guo X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org This adds a i.MX25 dt machine descriptor and changes the clock support to optionally initialize from dt. Signed-off-by: Sascha Hauer Acked-by: Shawn Guo --- arch/arm/mach-imx/Kconfig | 7 ++++ arch/arm/mach-imx/Makefile | 1 + arch/arm/mach-imx/clk-imx25.c | 56 ++++++++++++++++++++++++++++--- arch/arm/mach-imx/imx25-dt.c | 48 ++++++++++++++++++++++++++ arch/arm/plat-mxc/include/mach/common.h | 1 + 5 files changed, 109 insertions(+), 4 deletions(-) create mode 100644 arch/arm/mach-imx/imx25-dt.c diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig index afd542a..f5450c7 100644 --- a/arch/arm/mach-imx/Kconfig +++ b/arch/arm/mach-imx/Kconfig @@ -200,6 +200,13 @@ config MACH_EUKREA_MBIMXSD25_BASEBOARD endchoice +config MACH_IMX25_DT + bool "Support i.MX25 platforms from device tree" + select SOC_IMX25 + help + Include support for Freescale i.MX25 based platforms + using the device tree for discovery + comment "MX27 platforms:" config MACH_MX27ADS diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile index d004d37..3cff403 100644 --- a/arch/arm/mach-imx/Makefile +++ b/arch/arm/mach-imx/Makefile @@ -30,6 +30,7 @@ obj-$(CONFIG_MACH_MX21ADS) += mach-mx21ads.o obj-$(CONFIG_MACH_MX25_3DS) += mach-mx25_3ds.o obj-$(CONFIG_MACH_EUKREA_CPUIMX25SD) += mach-eukrea_cpuimx25.o obj-$(CONFIG_MACH_EUKREA_MBIMXSD25_BASEBOARD) += eukrea_mbimxsd25-baseboard.o +obj-$(CONFIG_MACH_IMX25_DT) += imx25-dt.o # i.MX27 based machines obj-$(CONFIG_MACH_MX27ADS) += mach-mx27ads.o diff --git a/arch/arm/mach-imx/clk-imx25.c b/arch/arm/mach-imx/clk-imx25.c index d20d479..90c4561 100644 --- a/arch/arm/mach-imx/clk-imx25.c +++ b/arch/arm/mach-imx/clk-imx25.c @@ -23,6 +23,9 @@ #include #include #include +#include +#include +#include #include #include @@ -55,6 +58,8 @@ #define ccm(x) (CRM_BASE + (x)) +static struct clk_onecell_data clk_data; + static const char *cpu_sel_clks[] = { "mpll", "mpll_cpu_3_4", }; static const char *per_sel_clks[] = { "ahb", "upll", }; @@ -76,12 +81,12 @@ enum mx25_clks { static struct clk *clk[clk_max]; -int __init mx25_clocks_init(void) +static int __init __mx25_clocks_init(unsigned long osc_rate) { int i; clk[dummy] = imx_clk_fixed("dummy", 0); - clk[osc] = imx_clk_fixed("osc", 24000000); + clk[osc] = imx_clk_fixed("osc", osc_rate); clk[mpll] = imx_clk_pllv1("mpll", "osc", ccm(CCM_MPCTL)); clk[upll] = imx_clk_pllv1("upll", "osc", ccm(CCM_UPCTL)); clk[mpll_cpu_3_4] = imx_clk_fixed_factor("mpll_cpu_3_4", "mpll", 3, 4); @@ -172,6 +177,16 @@ int __init mx25_clocks_init(void) pr_err("i.MX25 clk %d: register failed with %ld\n", i, PTR_ERR(clk[i])); + clk_register_clkdev(clk[ipg], "ipg", "imx-gpt.0"); + clk_register_clkdev(clk[gpt_ipg_per], "per", "imx-gpt.0"); + + return 0; +} + +int __init mx25_clocks_init(void) +{ + __mx25_clocks_init(24000000); + /* i.mx25 has the i.mx21 type uart */ clk_register_clkdev(clk[uart1_ipg], "ipg", "imx21-uart.0"); clk_register_clkdev(clk[uart_ipg_per], "per", "imx21-uart.0"); @@ -183,8 +198,6 @@ int __init mx25_clocks_init(void) clk_register_clkdev(clk[uart_ipg_per], "per", "imx21-uart.3"); clk_register_clkdev(clk[uart5_ipg], "ipg", "imx21-uart.4"); clk_register_clkdev(clk[uart_ipg_per], "per", "imx21-uart.4"); - clk_register_clkdev(clk[ipg], "ipg", "imx-gpt.0"); - clk_register_clkdev(clk[gpt_ipg_per], "per", "imx-gpt.0"); clk_register_clkdev(clk[ipg], "ipg", "mxc-ehci.0"); clk_register_clkdev(clk[usbotg_ahb], "ahb", "mxc-ehci.0"); clk_register_clkdev(clk[usb_div], "per", "mxc-ehci.0"); @@ -242,5 +255,40 @@ int __init mx25_clocks_init(void) clk_register_clkdev(clk[iim_ipg], "iim", NULL); mxc_timer_init(MX25_IO_ADDRESS(MX25_GPT1_BASE_ADDR), MX25_INT_GPT1); + + return 0; +} + +int __init mx25_clocks_init_dt(void) +{ + struct device_node *np; + void __iomem *base; + int irq; + unsigned long osc_rate = 24000000; + + /* retrieve the freqency of fixed clocks from device tree */ + for_each_compatible_node(np, NULL, "fixed-clock") { + u32 rate; + if (of_property_read_u32(np, "clock-frequency", &rate)) + continue; + + if (of_device_is_compatible(np, "fsl,imx-osc")) + osc_rate = rate; + } + + np = of_find_compatible_node(NULL, NULL, "fsl,imx25-ccm"); + clk_data.clks = clk; + clk_data.clk_num = ARRAY_SIZE(clk); + of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data); + + __mx25_clocks_init(osc_rate); + + np = of_find_compatible_node(NULL, NULL, "fsl,imx25-gpt"); + base = of_iomap(np, 0); + WARN_ON(!base); + irq = irq_of_parse_and_map(np, 0); + + mxc_timer_init(base, irq); + return 0; } diff --git a/arch/arm/mach-imx/imx25-dt.c b/arch/arm/mach-imx/imx25-dt.c new file mode 100644 index 0000000..79e66f7 --- /dev/null +++ b/arch/arm/mach-imx/imx25-dt.c @@ -0,0 +1,48 @@ +/* + * Copyright 2012 Sascha Hauer, Pengutronix + * + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ + +#include +#include +#include +#include +#include +#include +#include + +static void __init imx25_dt_init(void) +{ + of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); +} + +static void __init imx25_timer_init(void) +{ + mx25_clocks_init_dt(); +} + +static struct sys_timer imx25_timer = { + .init = imx25_timer_init, +}; + +static const char * const imx25_dt_board_compat[] __initconst = { + "fsl,imx25", + NULL +}; + +DT_MACHINE_START(IMX25_DT, "Freescale i.MX25 (Device Tree Support)") + .map_io = mx25_map_io, + .init_early = imx25_init_early, + .init_irq = mx25_init_irq, + .handle_irq = imx25_handle_irq, + .timer = &imx25_timer, + .init_machine = imx25_dt_init, + .dt_compat = imx25_dt_board_compat, + .restart = mxc_restart, +MACHINE_END diff --git a/arch/arm/plat-mxc/include/mach/common.h b/arch/arm/plat-mxc/include/mach/common.h index 7128e97..2b4dead 100644 --- a/arch/arm/plat-mxc/include/mach/common.h +++ b/arch/arm/plat-mxc/include/mach/common.h @@ -67,6 +67,7 @@ extern int mx51_clocks_init(unsigned long ckil, unsigned long osc, unsigned long ckih1, unsigned long ckih2); extern int mx53_clocks_init(unsigned long ckil, unsigned long osc, unsigned long ckih1, unsigned long ckih2); +extern int mx25_clocks_init_dt(void); extern int mx27_clocks_init_dt(void); extern int mx31_clocks_init_dt(void); extern int mx51_clocks_init_dt(void);