ARM: shmobile: r8a7740: add A3SP pm domain support

This patch adds basic A3SP pm domain support.
Now, below devices can be controled by PM

DMAC1/2/3, IPMMU, DDM, FLCTL, SYS-HPB, BBIF1, MSIOF1/2,
SCIFA,SCIFB, IIC1, IrDA, USBH, USBDMAC, SDHI0/1/2, TPU,
DREQPAK (Sys),  MMCIF, RSPI, SIM, USBF

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>

1 files changed, 19 insertions, 0 deletions

diff --git a/arch/arm/mach-shmobile/pm-r8a7740.c b/arch/arm/mach-shmobile/pm-r8a7740.c
index d2fe81570a74..de7c6214ce63 100644
--- a/arch/arm/mach-shmobile/pm-r8a7740.c
+++ b/arch/arm/mach-shmobile/pm-r8a7740.c
@@ -8,6 +8,7 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  */
+#include <linux/console.h>
 #include <mach/pm-rmobile.h>
 
 #ifdef CONFIG_PM
@@ -27,4 +28,22 @@ struct rmobile_pm_domain r8a7740_pd_a4s = {
         .no_debug       = true,
         .suspend        = r8a7740_pd_a4s_suspend,
 };
+
+static int r8a7740_pd_a3sp_suspend(void)
+{
+        /*
+         * Serial consoles make use of SCIF hardware located in A3SP,
+         * keep such power domain on if "no_console_suspend" is set.
+         */
+        return console_suspend_enabled ? 0 : -EBUSY;
+}
+
+struct rmobile_pm_domain r8a7740_pd_a3sp = {
+        .genpd.name     = "A3SP",
+        .bit_shift      = 11,
+        .gov            = &pm_domain_always_on_gov,
+        .no_debug       = true,
+        .suspend        = r8a7740_pd_a3sp_suspend,
+};
+
 #endif /* CONFIG_PM */