ARM: mx5: use generic irq chip pm interface for pm functions on
Two problems exist in the current i.MX5 pm suspend/resume and idle
functions. The first is the current i.MX5 suspend routine will call
tzic_enable_wake(1) to set wake source, this will set all enabled
irq as wake source rather than those wake capable. The second
is i.MX5 idle will call mx5_cpu_lp_set() to prepare enter low power
mode, but it forgets to call wfi instruction to enter this mode.
To fix these two problems, using generic irq chip pm interface and
modify function imx5_idle().
[Tested by Shawn Guo on imx51 babbage board.
Tested by Hui Wang on imx51 pdk board.]
Signed-off-by: Hui Wang <jason77.wang@gmail.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
diff --git a/arch/arm/plat-mxc/tzic.c b/arch/arm/plat-mxc/tzic.c
index a3c164c..98308ec 100644
--- a/arch/arm/plat-mxc/tzic.c
+++ b/arch/arm/plat-mxc/tzic.c
@@ -73,7 +73,28 @@
#define tzic_set_irq_fiq NULL
#endif
-static unsigned int *wakeup_intr[4];
+#ifdef CONFIG_PM
+static void tzic_irq_suspend(struct irq_data *d)
+{
+ struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
+ int idx = gc->irq_base >> 5;
+
+ __raw_writel(gc->wake_active, tzic_base + TZIC_WAKEUP0(idx));
+}
+
+static void tzic_irq_resume(struct irq_data *d)
+{
+ struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
+ int idx = gc->irq_base >> 5;
+
+ __raw_writel(__raw_readl(tzic_base + TZIC_ENSET0(idx)),
+ tzic_base + TZIC_WAKEUP0(idx));
+}
+
+#else
+#define tzic_irq_suspend NULL
+#define tzic_irq_resume NULL
+#endif
static struct mxc_extra_irq tzic_extra_irq = {
#ifdef CONFIG_FIQ
@@ -91,12 +112,13 @@
handle_level_irq);
gc->private = &tzic_extra_irq;
gc->wake_enabled = IRQ_MSK(32);
- wakeup_intr[idx] = &gc->wake_active;
ct = gc->chip_types;
ct->chip.irq_mask = irq_gc_mask_disable_reg;
ct->chip.irq_unmask = irq_gc_unmask_enable_reg;
ct->chip.irq_set_wake = irq_gc_set_wake;
+ ct->chip.irq_suspend = tzic_irq_suspend;
+ ct->chip.irq_resume = tzic_irq_resume;
ct->regs.disable = TZIC_ENCLEAR0(idx);
ct->regs.enable = TZIC_ENSET0(idx);
@@ -167,23 +189,19 @@
/**
* tzic_enable_wake() - enable wakeup interrupt
*
- * @param is_idle 1 if called in idle loop (ENSET0 register);
- * 0 to be used when called from low power entry
* @return 0 if successful; non-zero otherwise
*/
-int tzic_enable_wake(int is_idle)
+int tzic_enable_wake(void)
{
- unsigned int i, v;
+ unsigned int i;
__raw_writel(1, tzic_base + TZIC_DSMINT);
if (unlikely(__raw_readl(tzic_base + TZIC_DSMINT) == 0))
return -EAGAIN;
- for (i = 0; i < 4; i++) {
- v = is_idle ? __raw_readl(tzic_base + TZIC_ENSET0(i)) :
- *wakeup_intr[i];
- __raw_writel(v, tzic_base + TZIC_WAKEUP0(i));
- }
+ for (i = 0; i < 4; i++)
+ __raw_writel(__raw_readl(tzic_base + TZIC_ENSET0(i)),
+ tzic_base + TZIC_WAKEUP0(i));
return 0;
}