From c7165ccf8e305651410dc303f7b9390b94669c97 Mon Sep 17 00:00:00 2001 From: Jouni Hogander Date: Mon, 30 Jun 2008 11:52:48 +0300 Subject: [PATCH] OMAP: PM: Add new sysfs option for disabling clocks when entering idle There are drivers that are not disabling their clocks (gpio & uart). These clocks need to be disabled if retention/off state is wanted when idling. Before disabling them in idle loop this option needs to be checked. Signed-off-by: Jouni Hogander Signed-off-by: Tony Lindgren --- arch/arm/mach-omap2/pm.c | 37 +++++++++++++++++++++++++++++++------ arch/arm/mach-omap2/pm.h | 1 + 2 files changed, 32 insertions(+), 6 deletions(-) diff --git a/arch/arm/mach-omap2/pm.c b/arch/arm/mach-omap2/pm.c index bef58d7dcc6..b7434dfc680 100644 --- a/arch/arm/mach-omap2/pm.c +++ b/arch/arm/mach-omap2/pm.c @@ -31,30 +31,51 @@ #include "pm.h" unsigned short enable_dyn_sleep; +unsigned short clocks_off_while_idle; atomic_t sleep_block = ATOMIC_INIT(0); +static ssize_t idle_show(struct kobject *, struct kobj_attribute *, char *); +static ssize_t idle_store(struct kobject *k, struct kobj_attribute *, + const char *buf, size_t n); + +static struct kobj_attribute sleep_while_idle_attr = + __ATTR(sleep_while_idle, 0644, idle_show, idle_store); + +static struct kobj_attribute clocks_off_while_idle_attr = + __ATTR(clocks_off_while_idle, 0644, idle_show, idle_store); + static ssize_t idle_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf) { - return sprintf(buf, "%hu\n", enable_dyn_sleep); + if (attr == &sleep_while_idle_attr) + return sprintf(buf, "%hu\n", enable_dyn_sleep); + else if (attr == &clocks_off_while_idle_attr) + return sprintf(buf, "%hu\n", clocks_off_while_idle); + else + return -EINVAL; } static ssize_t idle_store(struct kobject *kobj, struct kobj_attribute *attr, const char *buf, size_t n) { unsigned short value; + if (sscanf(buf, "%hu", &value) != 1 || (value != 0 && value != 1)) { - printk(KERN_ERR "idle_sleep_store: Invalid value\n"); + printk(KERN_ERR "idle_store: Invalid value\n"); return -EINVAL; } - enable_dyn_sleep = value; + + if (attr == &sleep_while_idle_attr) + enable_dyn_sleep = value; + else if (attr == &clocks_off_while_idle_attr) + clocks_off_while_idle = value; + else + return -EINVAL; + return n; } -static struct kobj_attribute sleep_while_idle_attr = - __ATTR(sleep_while_idle, 0644, idle_show, idle_store); - void omap2_block_sleep(void) { atomic_inc(&sleep_block); @@ -86,6 +107,10 @@ int __init omap_pm_init(void) error = sysfs_create_file(power_kobj, &sleep_while_idle_attr.attr); if (error) printk(KERN_ERR "sysfs_create_file failed: %d\n", error); + error = sysfs_create_file(power_kobj, + &clocks_off_while_idle_attr.attr); + if (error) + printk(KERN_ERR "sysfs_create_file failed: %d\n", error); return error; } diff --git a/arch/arm/mach-omap2/pm.h b/arch/arm/mach-omap2/pm.h index 351456e084a..0aeb4617709 100644 --- a/arch/arm/mach-omap2/pm.h +++ b/arch/arm/mach-omap2/pm.h @@ -17,6 +17,7 @@ extern int omap2_pm_init(void); extern int omap3_pm_init(void); extern unsigned short enable_dyn_sleep; +extern unsigned short clocks_off_while_idle; extern atomic_t sleep_block; #ifdef CONFIG_PM_DEBUG -- 2.41.0