ARM: at91: pm: initial PM support for SAM9X60

Add initial PM support for SAM9X60. This include idle, WFI and ULP0.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Ludovic Desroches <ludovic.desroches@microchip.com>

3 files changed, 34 insertions, 0 deletions

diff --git a/arch/arm/mach-at91/at91sam9.c b/arch/arm/mach-at91/at91sam9.c
index 3dbdef4d3cbf..c12563b09656 100644
--- a/arch/arm/mach-at91/at91sam9.c
+++ b/arch/arm/mach-at91/at91sam9.c
@@ -32,3 +32,21 @@ DT_MACHINE_START(at91sam_dt, "Atmel AT91SAM9")
         .init_machine   = at91sam9_init,
         .dt_compat      = at91_dt_board_compat,
 MACHINE_END
+
+static void __init sam9x60_init(void)
+{
+        of_platform_default_populate(NULL, NULL, NULL);
+
+        sam9x60_pm_init();
+}
+
+static const char *const sam9x60_dt_board_compat[] __initconst = {
+        "microchip,sam9x60",
+        NULL
+};
+
+DT_MACHINE_START(sam9x60_dt, "Microchip SAM9X60")
+        /* Maintainer: Microchip */
+        .init_machine   = sam9x60_init,
+        .dt_compat      = sam9x60_dt_board_compat,
+MACHINE_END
diff --git a/arch/arm/mach-at91/generic.h b/arch/arm/mach-at91/generic.h
index e2bd17237964..72b45accfa0f 100644
--- a/arch/arm/mach-at91/generic.h
+++ b/arch/arm/mach-at91/generic.h
@@ -14,11 +14,13 @@
 #ifdef CONFIG_PM
 extern void __init at91rm9200_pm_init(void);
 extern void __init at91sam9_pm_init(void);
+extern void __init sam9x60_pm_init(void);
 extern void __init sama5_pm_init(void);
 extern void __init sama5d2_pm_init(void);
 #else
 static inline void __init at91rm9200_pm_init(void) { }
 static inline void __init at91sam9_pm_init(void) { }
+static inline void __init sam9x60_pm_init(void) { }
 static inline void __init sama5_pm_init(void) { }
 static inline void __init sama5d2_pm_init(void) { }
 #endif
diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c
index ce2ff86968f6..e42db02eafe4 100644
--- a/arch/arm/mach-at91/pm.c
+++ b/arch/arm/mach-at91/pm.c
@@ -518,6 +518,11 @@ static void at91rm9200_idle(void)
         writel(AT91_PMC_PCK, soc_pm.data.pmc + AT91_PMC_SCDR);
 }
 
+static void at91sam9x60_idle(void)
+{
+        cpu_do_idle();
+}
+
 static void at91sam9_idle(void)
 {
         writel(AT91_PMC_PCK, soc_pm.data.pmc + AT91_PMC_SCDR);
@@ -754,6 +759,15 @@ void __init at91rm9200_pm_init(void)
         at91_pm_init(at91rm9200_idle);
 }
 
+void __init sam9x60_pm_init(void)
+{
+        if (!IS_ENABLED(CONFIG_SOC_AT91SAM9))
+                return;
+
+        at91_dt_ramc();
+        at91_pm_init(at91sam9x60_idle);
+}
+
 void __init at91sam9_pm_init(void)
 {
         if (!IS_ENABLED(CONFIG_SOC_AT91SAM9))