[PATCH] soc: ti: pm33xx: Enable DS0 for the platforms on which it is functional
From: j-keerthy@ti.com (Keerthy)
Date: 2018-08-22 05:33:16
Also in:
linux-omap, lkml
Subsystem:
arm port, omap power management support, omap2+ support, the rest, ti keystone multicore navigator drivers · Maintainers:
Russell King, Kevin Hilman, Aaro Koskinen, Andreas Kemnade, Roger Quadros, Tony Lindgren, Linus Torvalds, Nishanth Menon, Santosh Shilimkar
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 {
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1.9.1