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authorPaul Walmsley <paul@pwsan.com>2015-02-07 01:56:07 +0300
committerTony Lindgren <tony@atomide.com>2015-03-17 02:09:23 +0300
commit7239d309b58d48616d3cda79050566fdb48196ef (patch)
tree18f741d796393c5ed4a6c5b630aa11a8b104fb8c /arch/arm/mach-omap1/pm.c
parentc517d838eb7d07bbe9507871fab3931deccff539 (diff)
downloadlinux-7239d309b58d48616d3cda79050566fdb48196ef.tar.xz
ARM: OMAP1: PM: fix some build warnings on 1510-only Kconfigs
Building an OMAP1510-only Kconfig generates the following warnings: arch/arm/mach-omap1/pm.c: In function ¡omap1_pm_idle¢: arch/arm/mach-omap1/pm.c:123:2: warning: #warning Enable 32kHz OS timer in order to allow sleep states in idle [-Wcpp] #warning Enable 32kHz OS timer in order to allow sleep states in idle ^ arch/arm/mach-omap1/pm.c: At top level: arch/arm/mach-omap1/pm.c:76:23: warning: ¡enable_dyn_sleep¢ defined but not used [-Wunused-variable] static unsigned short enable_dyn_sleep = 0; ^ These are not so easy to fix in an obviously correct fashion, since I don't have these devices up and running in my testbed. So, use arch/arm/plat-omap/Kconfig and the existing pm.c source as a guide, and posit that deep power saving states are only supported on OMAP16xx chips with kernels built with both CONFIG_OMAP_DM_TIMER=y and CONFIG_OMAP_32K_TIMER=y. While here, clean up a few printk()s and unnecessary #ifdefs. This second version of the patch incorporates several suggestions from Jon Hunter <jgchunter@gmail.com>. Signed-off-by: Paul Walmsley <paul@pwsan.com> Cc: Jon Hunter <jonathanh@nvidia.com> Cc: Aaro Koskinen <aaro.koskinen@iki.fi> Cc: Tuukka Tikkanen <tuukka.tikkanen@linaro.org> Cc: Kevin Hilman <khilman@deeprootsystems.com> Cc: Tony Lindgren <tony@atomide.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: linux-omap@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Acked-by: Jon Hunter <jgchunter@gmail.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'arch/arm/mach-omap1/pm.c')
-rw-r--r--arch/arm/mach-omap1/pm.c51
1 files changed, 25 insertions, 26 deletions
diff --git a/arch/arm/mach-omap1/pm.c b/arch/arm/mach-omap1/pm.c
index 34b4c0044961..dd94567c3628 100644
--- a/arch/arm/mach-omap1/pm.c
+++ b/arch/arm/mach-omap1/pm.c
@@ -71,13 +71,7 @@ static unsigned int mpui7xx_sleep_save[MPUI7XX_SLEEP_SAVE_SIZE];
static unsigned int mpui1510_sleep_save[MPUI1510_SLEEP_SAVE_SIZE];
static unsigned int mpui1610_sleep_save[MPUI1610_SLEEP_SAVE_SIZE];
-#ifndef CONFIG_OMAP_32K_TIMER
-
-static unsigned short enable_dyn_sleep = 0;
-
-#else
-
-static unsigned short enable_dyn_sleep = 1;
+static unsigned short enable_dyn_sleep;
static ssize_t idle_show(struct kobject *kobj, struct kobj_attribute *attr,
char *buf)
@@ -90,8 +84,9 @@ static ssize_t idle_store(struct kobject *kobj, struct kobj_attribute *attr,
{
unsigned short value;
if (sscanf(buf, "%hu", &value) != 1 ||
- (value != 0 && value != 1)) {
- printk(KERN_ERR "idle_sleep_store: Invalid value\n");
+ (value != 0 && value != 1) ||
+ (value != 0 && !IS_ENABLED(CONFIG_OMAP_32K_TIMER))) {
+ pr_err("idle_sleep_store: Invalid value\n");
return -EINVAL;
}
enable_dyn_sleep = value;
@@ -101,7 +96,6 @@ static ssize_t idle_store(struct kobject *kobj, struct kobj_attribute *attr,
static struct kobj_attribute sleep_while_idle_attr =
__ATTR(sleep_while_idle, 0644, idle_show, idle_store);
-#endif
static void (*omap_sram_suspend)(unsigned long r0, unsigned long r1) = NULL;
@@ -115,16 +109,11 @@ void omap1_pm_idle(void)
{
extern __u32 arm_idlect1_mask;
__u32 use_idlect1 = arm_idlect1_mask;
- int do_sleep = 0;
local_fiq_disable();
#if defined(CONFIG_OMAP_MPU_TIMER) && !defined(CONFIG_OMAP_DM_TIMER)
-#warning Enable 32kHz OS timer in order to allow sleep states in idle
use_idlect1 = use_idlect1 & ~(1 << 9);
-#else
- if (enable_dyn_sleep)
- do_sleep = 1;
#endif
#ifdef CONFIG_OMAP_DM_TIMER
@@ -134,10 +123,12 @@ void omap1_pm_idle(void)
if (omap_dma_running())
use_idlect1 &= ~(1 << 6);
- /* We should be able to remove the do_sleep variable and multiple
+ /*
+ * We should be able to remove the do_sleep variable and multiple
* tests above as soon as drivers, timer and DMA code have been fixed.
- * Even the sleep block count should become obsolete. */
- if ((use_idlect1 != ~0) || !do_sleep) {
+ * Even the sleep block count should become obsolete.
+ */
+ if ((use_idlect1 != ~0) || !enable_dyn_sleep) {
__u32 saved_idlect1 = omap_readl(ARM_IDLECT1);
if (cpu_is_omap15xx())
@@ -635,15 +626,25 @@ static const struct platform_suspend_ops omap_pm_ops = {
static int __init omap_pm_init(void)
{
-
-#ifdef CONFIG_OMAP_32K_TIMER
- int error;
-#endif
+ int error = 0;
if (!cpu_class_is_omap1())
return -ENODEV;
- printk("Power Management for TI OMAP.\n");
+ pr_info("Power Management for TI OMAP.\n");
+
+ if (!IS_ENABLED(CONFIG_OMAP_32K_TIMER))
+ pr_info("OMAP1 PM: sleep states in idle disabled due to no 32KiHz timer\n");
+
+ if (!IS_ENABLED(CONFIG_OMAP_DM_TIMER))
+ pr_info("OMAP1 PM: sleep states in idle disabled due to no DMTIMER support\n");
+
+ if (IS_ENABLED(CONFIG_OMAP_32K_TIMER) &&
+ IS_ENABLED(CONFIG_OMAP_DM_TIMER)) {
+ /* OMAP16xx only */
+ pr_info("OMAP1 PM: sleep states in idle enabled\n");
+ enable_dyn_sleep = 1;
+ }
/*
* We copy the assembler sleep/wakeup routines to SRAM.
@@ -693,17 +694,15 @@ static int __init omap_pm_init(void)
omap_pm_init_debugfs();
#endif
-#ifdef CONFIG_OMAP_32K_TIMER
error = sysfs_create_file(power_kobj, &sleep_while_idle_attr.attr);
if (error)
printk(KERN_ERR "sysfs_create_file failed: %d\n", error);
-#endif
if (cpu_is_omap16xx()) {
/* configure LOW_PWR pin */
omap_cfg_reg(T20_1610_LOW_PWR);
}
- return 0;
+ return error;
}
__initcall(omap_pm_init);