ARM: OMAP3/4: PRM: add support of late_init call to prm_ll_ops

SoC specific late_init call is now registered during PRM init, and will
be called automatically by PRM core. This helps to get rid of some
redundant initcalls and cpu_is_X checks from the PRM code.
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>

arch/arm/mach-omap2/prm.h

@@ -126,6 +126,7 @@ struct prm_reset_src_map {
  * @read_reset_sources: ptr to the SoC PRM-specific get_reset_source impl
  * @was_any_context_lost_old: ptr to the SoC PRM context loss test fn
  * @clear_context_loss_flags_old: ptr to the SoC PRM context loss flag clear fn
+ * @late_init: ptr to the late init function
  *
  * XXX @was_any_context_lost_old and @clear_context_loss_flags_old are
  * deprecated.
@@ -134,6 +135,7 @@ struct prm_ll_data {
 	u32 (*read_reset_sources)(void);
 	bool (*was_any_context_lost_old)(u8 part, s16 inst, u16 idx);
 	void (*clear_context_loss_flags_old)(u8 part, s16 inst, u16 idx);
+	int (*late_init)(void);
 };
 
 extern int prm_register(struct prm_ll_data *pld);

arch/arm/mach-omap2/prm3xxx.c

@@ -401,8 +401,11 @@ struct pwrdm_ops omap3_pwrdm_operations = {
  *
  */
 
+static int omap3xxx_prm_late_init(void);
+
 static struct prm_ll_data omap3xxx_prm_ll_data = {
 	.read_reset_sources = &omap3xxx_prm_read_reset_sources,
+	.late_init = &omap3xxx_prm_late_init,
 };
 
 int __init omap3xxx_prm_init(void)
@@ -417,9 +420,6 @@ static int __init omap3xxx_prm_late_init(void)
 {
 	int ret;
 
-	if (!cpu_is_omap34xx())
-		return 0;
-
 	if (!(prm_features & PRM_HAS_IO_WAKEUP))
 		return 0;
 
@@ -431,7 +431,6 @@ static int __init omap3xxx_prm_late_init(void)
 
 	return ret;
 }
-omap_subsys_initcall(omap3xxx_prm_late_init);
 
 static void __exit omap3xxx_prm_exit(void)
 {

arch/arm/mach-omap2/prm44xx.c

@@ -650,6 +650,8 @@ struct pwrdm_ops omap4_pwrdm_operations = {
 	.pwrdm_has_voltdm	= omap4_check_vcvp,
 };
 
+static int omap44xx_prm_late_init(void);
+
 /*
  * XXX document
  */
@@ -657,6 +659,7 @@ 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,
 };
 
 int __init omap44xx_prm_init(void)
@@ -669,9 +672,6 @@ int __init omap44xx_prm_init(void)
 
 static int __init omap44xx_prm_late_init(void)
 {
-	if (!cpu_is_omap44xx())
-		return 0;
-
 	if (!(prm_features & PRM_HAS_IO_WAKEUP))
 		return 0;
 
@@ -679,7 +679,6 @@ static int __init omap44xx_prm_late_init(void)
 
 	return omap_prcm_register_chain_handler(&omap4_prcm_irq_setup);
 }
-omap_subsys_initcall(omap44xx_prm_late_init);
 
 static void __exit omap44xx_prm_exit(void)
 {

arch/arm/mach-omap2/prm_common.c

@@ -527,3 +527,11 @@ int __init of_prcm_init(void)
 
 	return 0;
 }
+
+static int __init prm_late_init(void)
+{
+	if (prm_ll_data->late_init)
+		return prm_ll_data->late_init();
+	return 0;
+}
+subsys_initcall(prm_late_init);