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Subject[PATCH] soc: ti: pm33xx: Enable DS0 for the platforms on which it is functional
Date
Enable DS0 for only those platforms on which it is functional

Signed-off-by: Keerthy <j-keerthy@ti.com>
---
arch/arm/mach-omap2/pm33xx-core.c | 5 +++++
drivers/soc/ti/pm33xx.c | 9 +++++++++
include/linux/platform_data/pm33xx.h | 2 ++
3 files changed, 16 insertions(+)

diff --git a/arch/arm/mach-omap2/pm33xx-core.c b/arch/arm/mach-omap2/pm33xx-core.c
index f4971e4..f0f6e8e 100644
--- a/arch/arm/mach-omap2/pm33xx-core.c
+++ b/arch/arm/mach-omap2/pm33xx-core.c
@@ -135,6 +135,11 @@ static int am43xx_suspend(unsigned int state, int (*fn)(unsigned long),
{
int ret = 0;

+ if (!(args & WFI_FLAG_DEEP_SLEEP0)) {
+ pr_err("DS0 mode not supported\n");
+ return -ENOTSUPP;
+ }
+
amx3_pre_suspend_common();
scu_power_mode(scu_base, SCU_PM_POWEROFF);
ret = cpu_suspend(args, fn);
diff --git a/drivers/soc/ti/pm33xx.c b/drivers/soc/ti/pm33xx.c
index d0dab32..53238d7 100644
--- a/drivers/soc/ti/pm33xx.c
+++ b/drivers/soc/ti/pm33xx.c
@@ -324,6 +324,15 @@ static int am33xx_pm_probe(struct platform_device *pdev)
suspend_wfi_flags |= WFI_FLAG_SAVE_EMIF;
suspend_wfi_flags |= WFI_FLAG_WAKE_M3;

+ /*
+ * Deep Sleep0 mode is currently functional only on am437x-gp-evm,
+ * am33xx-evm and boneblack family. Hence set the DS0 flag
+ */
+ if (of_machine_is_compatible("ti,am437x-gp-evm") ||
+ of_machine_is_compatible("ti,am335x-bone-black") ||
+ of_machine_is_compatible("ti,am335x-evm"))
+ suspend_wfi_flags |= WFI_FLAG_DEEP_SLEEP0;
+
ret = pm_ops->init();
if (ret) {
dev_err(dev, "Unable to call core pm init!\n");
diff --git a/include/linux/platform_data/pm33xx.h b/include/linux/platform_data/pm33xx.h
index fbf5ed7..5c54b64 100644
--- a/include/linux/platform_data/pm33xx.h
+++ b/include/linux/platform_data/pm33xx.h
@@ -28,12 +28,14 @@
* WFI_FLAG_WAKE_M3: Disable MPU clock or clockdomain to cause wkup_m3 to
* execute when WFI instruction executes.
* WFI_FLAG_RTC_ONLY: Configure the RTC to enter RTC+DDR mode.
+ * WFI_FLAG_DEEP_SLEEP0: Configure to enter Depp Sleep 0 mode.
*/
#define WFI_FLAG_FLUSH_CACHE BIT(0)
#define WFI_FLAG_SELF_REFRESH BIT(1)
#define WFI_FLAG_SAVE_EMIF BIT(2)
#define WFI_FLAG_WAKE_M3 BIT(3)
#define WFI_FLAG_RTC_ONLY BIT(4)
+#define WFI_FLAG_DEEP_SLEEP0 BIT(5)

#ifndef __ASSEMBLER__
struct am33xx_pm_sram_addr {
--
1.9.1
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