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Diffstat (limited to 'arch/arm/mach-omap2/prm44xx.c')
-rw-r--r--arch/arm/mach-omap2/prm44xx.c55
1 files changed, 55 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/prm44xx.c b/arch/arm/mach-omap2/prm44xx.c
index 87e86a4a9ead..3ab5df1ce900 100644
--- a/arch/arm/mach-omap2/prm44xx.c
+++ b/arch/arm/mach-omap2/prm44xx.c
@@ -337,6 +337,27 @@ static void omap44xx_prm_reconfigure_io_chain(void)
}
/**
+ * omap44xx_prm_enable_io_wakeup - enable wakeup events from I/O wakeup latches
+ *
+ * Activates the I/O wakeup event latches and allows events logged by
+ * those latches to signal a wakeup event to the PRCM. For I/O wakeups
+ * to occur, WAKEUPENABLE bits must be set in the pad mux registers, and
+ * omap44xx_prm_reconfigure_io_chain() must be called. No return value.
+ */
+static void __init omap44xx_prm_enable_io_wakeup(void)
+{
+ s32 inst = omap4_prmst_get_prm_dev_inst();
+
+ if (inst == PRM_INSTANCE_UNKNOWN)
+ return;
+
+ omap4_prm_rmw_inst_reg_bits(OMAP4430_GLOBAL_WUEN_MASK,
+ OMAP4430_GLOBAL_WUEN_MASK,
+ inst,
+ omap4_prcm_irq_setup.pm_ctrl);
+}
+
+/**
* omap44xx_prm_read_reset_sources - return the last SoC reset source
*
* Return a u32 representing the last reset sources of the SoC. The
@@ -668,6 +689,8 @@ struct pwrdm_ops omap4_pwrdm_operations = {
.pwrdm_has_voltdm = omap4_check_vcvp,
};
+static int omap44xx_prm_late_init(void);
+
/*
* XXX document
*/
@@ -675,6 +698,7 @@ static struct prm_ll_data omap44xx_prm_ll_data = {
.read_reset_sources = &omap44xx_prm_read_reset_sources,
.was_any_context_lost_old = &omap44xx_prm_was_any_context_lost_old,
.clear_context_loss_flags_old = &omap44xx_prm_clear_context_loss_flags_old,
+ .late_init = &omap44xx_prm_late_init,
.assert_hardreset = omap4_prminst_assert_hardreset,
.deassert_hardreset = omap4_prminst_deassert_hardreset,
.is_hardreset_asserted = omap4_prminst_is_hardreset_asserted,
@@ -711,6 +735,37 @@ int __init omap44xx_prm_init(const struct omap_prcm_init_data *data)
return prm_register(&omap44xx_prm_ll_data);
}
+static int omap44xx_prm_late_init(void)
+{
+ int irq_num;
+
+ if (!(prm_features & PRM_HAS_IO_WAKEUP))
+ return 0;
+
+ irq_num = of_irq_get(prm_init_data->np, 0);
+ /*
+ * Already have OMAP4 IRQ num. For all other platforms, we need
+ * IRQ numbers from DT
+ */
+ if (irq_num < 0 && !(prm_init_data->flags & PRM_IRQ_DEFAULT)) {
+ if (irq_num == -EPROBE_DEFER)
+ return irq_num;
+
+ /* Have nothing to do */
+ return 0;
+ }
+
+ /* Once OMAP4 DT is filled as well */
+ if (irq_num >= 0) {
+ omap4_prcm_irq_setup.irq = irq_num;
+ omap4_prcm_irq_setup.xlate_irq = NULL;
+ }
+
+ omap44xx_prm_enable_io_wakeup();
+
+ return omap_prcm_register_chain_handler(&omap4_prcm_irq_setup);
+}
+
static void __exit omap44xx_prm_exit(void)
{
prm_unregister(&omap44xx_prm_ll_data);