From patchwork Wed Nov 24 16:54:05 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nishanth Menon X-Patchwork-Id: 353681 X-Patchwork-Delegate: khilman@deeprootsystems.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter1.kernel.org (8.14.4/8.14.3) with ESMTP id oAOI5FHQ006391 for ; Wed, 24 Nov 2010 18:05:21 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755739Ab0KXQyR (ORCPT ); Wed, 24 Nov 2010 11:54:17 -0500 Received: from arroyo.ext.ti.com ([192.94.94.40]:55522 "EHLO arroyo.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755548Ab0KXQyP (ORCPT ); Wed, 24 Nov 2010 11:54:15 -0500 Received: from dlep35.itg.ti.com ([157.170.170.118]) by arroyo.ext.ti.com (8.13.7/8.13.7) with ESMTP id oAOGsAqc031333 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Wed, 24 Nov 2010 10:54:11 -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 oAOGs92k023665; Wed, 24 Nov 2010 10:54:09 -0600 (CST) Received: from senorita (senorita.am.dhcp.ti.com [128.247.74.250]) by legion.dal.design.ti.com (8.11.7p1+Sun/8.11.7) with ESMTP id oAOGs8f11839; Wed, 24 Nov 2010 10:54:08 -0600 (CST) Received: by senorita (Postfix, from userid 1000) id 6F190C24A; Wed, 24 Nov 2010 10:54:08 -0600 (CST) From: Nishanth Menon To: linux-omap Cc: Benoit , Tony , Kevin , Thomas Subject: [PATCH v5 1/3] omap: opp: add OMAP3 OPP table data and common init Date: Wed, 24 Nov 2010 10:54:05 -0600 Message-Id: <1290617647-3604-2-git-send-email-nm@ti.com> X-Mailer: git-send-email 1.6.3.3 In-Reply-To: <1290617647-3604-1-git-send-email-nm@ti.com> References: <1290617647-3604-1-git-send-email-nm@ti.com> Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter1.kernel.org [140.211.167.41]); Wed, 24 Nov 2010 18:05:21 +0000 (UTC) diff --git a/Documentation/arm/OMAP/omap_pm b/Documentation/arm/OMAP/omap_pm index 5389440..9012bb0 100644 --- a/Documentation/arm/OMAP/omap_pm +++ b/Documentation/arm/OMAP/omap_pm @@ -127,3 +127,28 @@ implementation needs: 10. (*pdata->cpu_set_freq)(unsigned long f) 11. (*pdata->cpu_get_freq)(void) + +Customizing OPP for platform +============================ +Defining CONFIG_PM should enable OPP layer for the silicon +and the registration of OPP table should take place automatically. +However, in special cases, the default OPP table may need to be +tweaked, for e.g.: + * enable default OPPs which are disabled by default, but which + could be enabled on a platform + * Disable an unsupported OPP on the platform + * Define and add a custom opp table entry +in these cases, the board file needs to do additional steps as follows: +arch/arm/mach-omapx/board-xyz.c + #include "pm.h" + .... + static void __init omap_xyz_init_irq(void) + { + .... + /* Initialize the default table */ + omapx_opp_init(); + /* Do customization to the defaults */ + .... + } +NOTE: omapx_opp_init will be omap3_opp_init or as required +based on the omap family. diff --git a/arch/arm/mach-omap2/Kconfig b/arch/arm/mach-omap2/Kconfig index ab784bf..102a7df 100644 --- a/arch/arm/mach-omap2/Kconfig +++ b/arch/arm/mach-omap2/Kconfig @@ -35,6 +35,8 @@ config ARCH_OMAP3 select CPU_V7 select USB_ARCH_HAS_EHCI select ARM_L1_CACHE_SHIFT_6 if !ARCH_OMAP4 + select ARCH_HAS_OPP + select PM_OPP if PM config ARCH_OMAP4 bool "TI OMAP4" diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile index 60e51bc..fbbb6b3 100644 --- a/arch/arm/mach-omap2/Makefile +++ b/arch/arm/mach-omap2/Makefile @@ -47,6 +47,12 @@ obj-$(CONFIG_ARCH_OMAP3) += mux34xx.o obj-$(CONFIG_ARCH_OMAP2) += sdrc2xxx.o # obj-$(CONFIG_ARCH_OMAP3) += sdrc3xxx.o +# OPP table initialization +ifeq ($(CONFIG_PM_OPP),y) +obj-y += opp.o +obj-$(CONFIG_ARCH_OMAP3) += opp3xxx_data.o +endif + # Power Management ifeq ($(CONFIG_PM),y) obj-$(CONFIG_ARCH_OMAP2) += pm24xx.o diff --git a/arch/arm/mach-omap2/omap_opp_data.h b/arch/arm/mach-omap2/omap_opp_data.h new file mode 100644 index 0000000..46ac27d --- /dev/null +++ b/arch/arm/mach-omap2/omap_opp_data.h @@ -0,0 +1,72 @@ +/* + * OMAP SoC specific OPP Data helpers + * + * Copyright (C) 2009-2010 Texas Instruments Incorporated - http://www.ti.com/ + * Nishanth Menon + * Kevin Hilman + * Copyright (C) 2010 Nokia Corporation. + * Eduardo Valentin + * + * 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 __ARCH_ARM_MACH_OMAP2_OMAP_OPP_DATA_H +#define __ARCH_ARM_MACH_OMAP2_OMAP_OPP_DATA_H + +#include + +/* + * *BIG FAT WARNING*: + * USE the following ONLY in opp data initialization common to an SoC. + * DO NOT USE these in board files/pm core etc. + */ + +/** + * struct omap_opp_def - OMAP OPP Definition + * @hwmod_name: Name of the hwmod for this domain + * @freq: Frequency in hertz corresponding to this OPP + * @u_volt: Nominal voltage in microvolts corresponding to this OPP + * @default_available: True/false - is this OPP available by default + * + * OMAP SOCs have a standard set of tuples consisting of frequency and voltage + * pairs that the device will support per voltage domain. This is called + * Operating Points or OPP. The actual definitions of OMAP Operating Points + * varies over silicon within the same family of devices. For a specific + * domain, you can have a set of {frequency, voltage} pairs and this is denoted + * by an array of omap_opp_def. As the kernel boots and more information is + * available, a set of these are activated based on the precise nature of + * device the kernel boots up on. It is interesting to remember that each IP + * which belongs to a voltage domain may define their own set of OPPs on top + * of this - but this is handled by the appropriate driver. + */ +struct omap_opp_def { + char *hwmod_name; + + unsigned long freq; + unsigned long u_volt; + + bool default_available; +}; + +/* + * Initialization wrapper used to define an OPP for OMAP variants. + */ +#define OPP_INITIALIZER(_hwmod_name, _enabled, _freq, _uv) \ +{ \ + .hwmod_name = _hwmod_name, \ + .default_available = _enabled, \ + .freq = _freq, \ + .u_volt = _uv, \ +} + +/* Use this to initialize the default table */ +extern int __init omap_init_opp_table(struct omap_opp_def *opp_def, + u32 opp_def_size); + +#endif /* __ARCH_ARM_MACH_OMAP2_OMAP_OPP_DATA_H */ diff --git a/arch/arm/mach-omap2/opp.c b/arch/arm/mach-omap2/opp.c new file mode 100644 index 0000000..ab8b35b --- /dev/null +++ b/arch/arm/mach-omap2/opp.c @@ -0,0 +1,93 @@ +/* + * OMAP SoC specific OPP wrapper function + * + * Copyright (C) 2009-2010 Texas Instruments Incorporated - http://www.ti.com/ + * Nishanth Menon + * Kevin Hilman + * Copyright (C) 2010 Nokia Corporation. + * Eduardo Valentin + * + * 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 "omap_opp_data.h" + +/* Temp variable to allow multiple calls */ +static u8 __initdata omap_table_init; + +/** + * omap_init_opp_table() - Initialize opp table as per the CPU type + * @opp_def: opp default list for this silicon + * @opp_def_size: number of opp entries for this silicon + * + * Register the initial OPP table with the OPP library based on the CPU + * type. This is meant to be used only by SoC specific registration. + */ +int __init omap_init_opp_table(struct omap_opp_def *opp_def, + u32 opp_def_size) +{ + int i, r; + + if (!opp_def || !opp_def_size) { + pr_err("%s: invalid params!\n", __func__); + return -EINVAL; + } + + /* + * Initialize only if not already initialized even if the previous + * call failed, because, no reason we'd succeed again. + */ + if (omap_table_init) + return -EEXIST; + omap_table_init = 1; + + /* Lets now register with OPP library */ + for (i = 0; i < opp_def_size; i++) { + struct omap_hwmod *oh; + struct device *dev; + + if (!opp_def->hwmod_name) { + pr_err("%s: NULL name of omap_hwmod, failing [%d].\n", + __func__, i); + return -EINVAL; + } + oh = omap_hwmod_lookup(opp_def->hwmod_name); + if (!oh || !oh->od) { + pr_warn("%s: no hwmod or odev for %s, [%d] " + "cannot add OPPs.\n", __func__, + opp_def->hwmod_name, i); + return -EINVAL; + } + dev = &oh->od->pdev.dev; + + r = opp_add(dev, opp_def->freq, opp_def->u_volt); + if (r) { + dev_err(dev, "%s: add OPP %ld failed for %s [%d] " + "result=%d\n", + __func__, opp_def->freq, + opp_def->hwmod_name, i, r); + } else { + if (!opp_def->default_available) + r = opp_disable(dev, opp_def->freq); + if (r) + dev_err(dev, "%s: disable %ld failed for %s " + "[%d] result=%d\n", + __func__, opp_def->freq, + opp_def->hwmod_name, i, r); + } + opp_def++; + } + + return 0; +} diff --git a/arch/arm/mach-omap2/opp3xxx_data.c b/arch/arm/mach-omap2/opp3xxx_data.c new file mode 100644 index 0000000..0486fce --- /dev/null +++ b/arch/arm/mach-omap2/opp3xxx_data.c @@ -0,0 +1,107 @@ +/* + * OMAP3 OPP table definitions. + * + * Copyright (C) 2009-2010 Texas Instruments Incorporated - http://www.ti.com/ + * Nishanth Menon + * Kevin Hilman + * Copyright (C) 2010 Nokia Corporation. + * Eduardo Valentin + * + * 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 "omap_opp_data.h" + +static struct omap_opp_def __initdata omap34xx_opp_def_list[] = { + /* MPU OPP1 */ + OPP_INITIALIZER("mpu", true, 125000000, 975000), + /* MPU OPP2 */ + OPP_INITIALIZER("mpu", true, 250000000, 1075000), + /* MPU OPP3 */ + OPP_INITIALIZER("mpu", true, 500000000, 1200000), + /* MPU OPP4 */ + OPP_INITIALIZER("mpu", true, 550000000, 1270000), + /* MPU OPP5 */ + OPP_INITIALIZER("mpu", true, 600000000, 1350000), + + /* + * L3 OPP1 - 41.5 MHz is disabled because: The voltage for that OPP is + * almost the same than the one at 83MHz thus providing very little + * gain for the power point of view. In term of energy it will even + * increase the consumption due to the very negative performance + * impact that frequency will do to the MPU and the whole system in + * general. + */ + OPP_INITIALIZER("l3_main", false, 41500000, 975000), + /* L3 OPP2 */ + OPP_INITIALIZER("l3_main", true, 83000000, 1050000), + /* L3 OPP3 */ + OPP_INITIALIZER("l3_main", true, 166000000, 1150000), + + /* DSP OPP1 */ + OPP_INITIALIZER("iva", true, 90000000, 975000), + /* DSP OPP2 */ + OPP_INITIALIZER("iva", true, 180000000, 1075000), + /* DSP OPP3 */ + OPP_INITIALIZER("iva", true, 360000000, 1200000), + /* DSP OPP4 */ + OPP_INITIALIZER("iva", true, 400000000, 1270000), + /* DSP OPP5 */ + OPP_INITIALIZER("iva", true, 430000000, 1350000), +}; + +static struct omap_opp_def __initdata omap36xx_opp_def_list[] = { + /* MPU OPP1 - OPP50 */ + OPP_INITIALIZER("mpu", true, 300000000, 1012500), + /* MPU OPP2 - OPP100 */ + OPP_INITIALIZER("mpu", true, 600000000, 1200000), + /* MPU OPP3 - OPP-Turbo */ + OPP_INITIALIZER("mpu", false, 800000000, 1325000), + /* MPU OPP4 - OPP-SB */ + OPP_INITIALIZER("mpu", false, 1000000000, 1375000), + + /* L3 OPP1 - OPP50 */ + OPP_INITIALIZER("l3_main", true, 100000000, 1000000), + /* L3 OPP2 - OPP100, OPP-Turbo, OPP-SB */ + OPP_INITIALIZER("l3_main", true, 200000000, 1200000), + + /* DSP OPP1 - OPP50 */ + OPP_INITIALIZER("iva", true, 260000000, 1012500), + /* DSP OPP2 - OPP100 */ + OPP_INITIALIZER("iva", true, 520000000, 1200000), + /* DSP OPP3 - OPP-Turbo */ + OPP_INITIALIZER("iva", false, 660000000, 1325000), + /* DSP OPP4 - OPP-SB */ + OPP_INITIALIZER("iva", false, 800000000, 1375000), +}; + +/** + * omap3_opp_init() - initialize omap3 opp table + */ +static int __init omap3_opp_init(void) +{ + int r = -ENODEV; + + if (!cpu_is_omap34xx()) + return r; + + if (cpu_is_omap3630()) + r = omap_init_opp_table(omap36xx_opp_def_list, + ARRAY_SIZE(omap36xx_opp_def_list)); + else + r = omap_init_opp_table(omap34xx_opp_def_list, + ARRAY_SIZE(omap34xx_opp_def_list)); + + return r; +} +device_initcall(omap3_opp_init); diff --git a/arch/arm/mach-omap2/pm.h b/arch/arm/mach-omap2/pm.h index 0d75bfd..2031f15 100644 --- a/arch/arm/mach-omap2/pm.h +++ b/arch/arm/mach-omap2/pm.h @@ -20,6 +20,15 @@ extern int omap3_can_sleep(void); extern int omap_set_pwrdm_state(struct powerdomain *pwrdm, u32 state); extern int omap3_idle_init(void); +#if defined(CONFIG_PM_OPP) +extern int omap3_opp_init(void); +#else +static inline int omap3_opp_init(void) +{ + return -EINVAL; +} +#endif + struct cpuidle_params { u8 valid; u32 sleep_latency;