ARM: OMAP2+: pm33xx-core: Add platform code needed for PM

Most of the PM code needed for am335x and am437x can be moved into a
module under drivers but some core code must remain in mach-omap2 at the
moment. This includes some internal clockdomain APIs and low-level ARM
APIs which are also not exported for use by modules.

Implement a few functions that handle these low-level platform
operations can be passed to the pm33xx module through the use of
platform data.

In addition to this, to be able to share data structures between C and
the sleep33xx and sleep43xx assembly code, we can automatically generate
all of the C struct member offsets and sizes as macros by processing
pm-asm-offsets.c into assembly code and then extracting the relevant
data as is done for the generated platform asm-offsets.h files.

Finally, add amx3_common_pm_init to create a dummy platform_device for
pm33xx so that our soon to be introduced pm33xx module can probe on
am335x and am437x platforms to enable basic suspend to mem and standby
support.

Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
Acked-by: Santosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 31 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/pm-asm-offsets.c b/arch/arm/mach-omap2/pm-asm-offsets.c
new file mode 100644
index 000000000000..6d4392da7c11
--- /dev/null
+++ b/arch/arm/mach-omap2/pm-asm-offsets.c
@@ -0,0 +1,31 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * TI AM33XX and AM43XX PM Assembly Offsets
+ *
+ * Copyright (C) 2017-2018 Texas Instruments Inc.
+ */
+
+#include <linux/kbuild.h>
+#include <linux/platform_data/pm33xx.h>
+
+int main(void)
+{
+	DEFINE(AMX3_PM_WFI_FLAGS_OFFSET,
+	       offsetof(struct am33xx_pm_sram_data, wfi_flags));
+	DEFINE(AMX3_PM_L2_AUX_CTRL_VAL_OFFSET,
+	       offsetof(struct am33xx_pm_sram_data, l2_aux_ctrl_val));
+	DEFINE(AMX3_PM_L2_PREFETCH_CTRL_VAL_OFFSET,
+	       offsetof(struct am33xx_pm_sram_data, l2_prefetch_ctrl_val));
+	DEFINE(AMX3_PM_SRAM_DATA_SIZE, sizeof(struct am33xx_pm_sram_data));
+
+	BLANK();
+
+	DEFINE(AMX3_PM_RO_SRAM_DATA_VIRT_OFFSET,
+	       offsetof(struct am33xx_pm_ro_sram_data, amx3_pm_sram_data_virt));
+	DEFINE(AMX3_PM_RO_SRAM_DATA_PHYS_OFFSET,
+	       offsetof(struct am33xx_pm_ro_sram_data, amx3_pm_sram_data_phys));
+	DEFINE(AMX3_PM_RO_SRAM_DATA_SIZE,
+	       sizeof(struct am33xx_pm_ro_sram_data));
+
+	return 0;
+}