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OMAP3: PM: Adding smartreflex class3 driver

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Smartreflex Class3 implementation continuously monitors
silicon performance  and instructs the Voltage Processors
to increase or decrease the voltage.
This patch adds smartreflex class 3 driver. This driver hooks
up with the generic smartreflex driver smartreflex.c to abstract
out class specific implementations out of the generic driver.

Class3 driver is chosen as the default class driver for smartreflex.
If any other class driver needs to be implemented, the init of that
driver should be called from the board file. That way the new class driver
will over-ride the Class3 driver.

Signed-off-by: Thara Gopinath <thara@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
This commit is contained in:
Thara Gopinath 2010-05-29 22:02:25 +05:30 committed by Kevin Hilman
parent d344272671
commit fa765823a3
3 changed files with 69 additions and 0 deletions
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1
arch/arm/mach-omap2/Makefile
View file

@ -63,6 +63,7 @@ obj-$(CONFIG_ARCH_OMAP3) += pm34xx.o sleep34xx.o voltage.o \
obj-$(CONFIG_ARCH_OMAP4) += pm44xx.o pm_bus.o
obj-$(CONFIG_PM_DEBUG) += pm-debug.o
obj-$(CONFIG_OMAP_SMARTREFLEX) += sr_device.o smartreflex.o
obj-$(CONFIG_OMAP_SMARTREFLEX_CLASS3) += smartreflex-class3.o
AFLAGS_sleep24xx.o :=-Wa,-march=armv6
AFLAGS_sleep34xx.o :=-Wa,-march=armv7-a

59
arch/arm/mach-omap2/smartreflex-class3.c Normal file
View file

@ -0,0 +1,59 @@
/*
* Smart reflex Class 3 specific implementations
*
* Author: Thara Gopinath <thara@ti.com>
*
* Copyright (C) 2010 Texas Instruments, Inc.
* Thara Gopinath <thara@ti.com>
*
* 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.
*/
#include <plat/smartreflex.h>
static int sr_class3_enable(struct voltagedomain *voltdm)
{
unsigned long volt = omap_voltage_get_nom_volt(voltdm);
if (!volt) {
pr_warning("%s: Curr voltage unknown. Cannot enable sr_%s\n",
__func__, voltdm->name);
return -ENODATA;
}
omap_vp_enable(voltdm);
return sr_enable(voltdm, volt);
}
static int sr_class3_disable(struct voltagedomain *voltdm, int is_volt_reset)
{
omap_vp_disable(voltdm);
sr_disable(voltdm);
if (is_volt_reset)
omap_voltage_reset(voltdm);
return 0;
}
static int sr_class3_configure(struct voltagedomain *voltdm)
{
return sr_configure_errgen(voltdm);
}
/* SR class3 structure */
static struct omap_sr_class_data class3_data = {
.enable = sr_class3_enable,
.disable = sr_class3_disable,
.configure = sr_class3_configure,
.class_type = SR_CLASS3,
};
/* Smartreflex Class3 init API to be called from board file */
static int __init sr_class3_init(void)
{
pr_info("SmartReflex Class3 initialized\n");
return sr_register_class(&class3_data);
}
late_initcall(sr_class3_init);

9
arch/arm/plat-omap/Kconfig
View file

@ -57,6 +57,15 @@ config OMAP_SMARTREFLEX
by default during system init via the enable_on_init flag
which an be passed as platform data to the smartreflex driver.
config OMAP_SMARTREFLEX_CLASS3
bool "Class 3 mode of Smartreflex Implementation"
depends on OMAP_SMARTREFLEX && TWL4030_CORE
help
Say Y to enable Class 3 implementation of Smartreflex
Class 3 implementation of Smartreflex employs continuous hardware
voltage calibration.
config OMAP_RESET_CLOCKS
bool "Reset unused clocks during boot"
depends on ARCH_OMAP