[PATCH v6 4/7] pmdomain: rockchip: Add smc call to inform firmware

[Shawn Lin <shawn.lin@rock-chips.com>]

Inform firmware to keep the power domain on or off.

Suggested-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
---

Changes in v6: None
Changes in v5:
- fix a compile warning

Changes in v4: None
Changes in v3: None
Changes in v2: None

 drivers/pmdomain/rockchip/pm-domains.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/pmdomain/rockchip/pm-domains.c b/drivers/pmdomain/rockchip/pm-domains.c
index cb0f938..49842f1 100644
--- a/drivers/pmdomain/rockchip/pm-domains.c
+++ b/drivers/pmdomain/rockchip/pm-domains.c
@@ -5,6 +5,7 @@
  * Copyright (c) 2015 ROCKCHIP, Co. Ltd.
  */
 
+#include <linux/arm-smccc.h>
 #include <linux/io.h>
 #include <linux/iopoll.h>
 #include <linux/err.h>
@@ -20,6 +21,7 @@
 #include <linux/regmap.h>
 #include <linux/mfd/syscon.h>
 #include <soc/rockchip/pm_domains.h>
+#include <soc/rockchip/rockchip_sip.h>
 #include <dt-bindings/power/px30-power.h>
 #include <dt-bindings/power/rockchip,rv1126-power.h>
 #include <dt-bindings/power/rk3036-power.h>
@@ -540,6 +542,7 @@ static void rockchip_do_pmu_set_power_domain(struct rockchip_pm_domain *pd,
 	struct generic_pm_domain *genpd = &pd->genpd;
 	u32 pd_pwr_offset = pd->info->pwr_offset;
 	bool is_on, is_mem_on = false;
+	struct arm_smccc_res res;
 
 	if (pd->info->pwr_mask == 0)
 		return;
@@ -567,6 +570,11 @@ static void rockchip_do_pmu_set_power_domain(struct rockchip_pm_domain *pd,
 			genpd->name, is_on);
 		return;
 	}
+
+	/* Inform firmware to keep this pd on or off */
+	arm_smccc_smc(ROCKCHIP_SIP_SUSPEND_MODE, ROCKCHIP_SLEEP_PD_CONFIG,
+			pmu->info->pwr_offset + pd_pwr_offset,
+			pd->info->pwr_mask, on, 0, 0, 0, &res);
 }
 
 static int rockchip_pd_power(struct rockchip_pm_domain *pd, bool power_on)
-- 
2.7.4