diff options
Diffstat (limited to 'arch/arm/mach-omap2/omap_opp_data.h')
| -rw-r--r-- | arch/arm/mach-omap2/omap_opp_data.h | 72 |
1 files changed, 72 insertions, 0 deletions
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 00000000000..46ac27dd6c8 --- /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 <plat/omap_hwmod.h> + +/* + * *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 */ |