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, 42 insertions, 0 deletions

diff --git a/include/linux/platform_data/pm33xx.h b/include/linux/platform_data/pm33xx.h
new file mode 100644
index 000000000000..f9bed2a0af9d
--- /dev/null
+++ b/include/linux/platform_data/pm33xx.h
@@ -0,0 +1,42 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * TI pm33xx platform data
+ *
+ * Copyright (C) 2016-2018 Texas Instruments, Inc.
+ *      Dave Gerlach <d-gerlach@ti.com>
+ */
+
+#ifndef _LINUX_PLATFORM_DATA_PM33XX_H
+#define _LINUX_PLATFORM_DATA_PM33XX_H
+
+#include <linux/kbuild.h>
+#include <linux/types.h>
+
+#ifndef __ASSEMBLER__
+struct am33xx_pm_sram_addr {
+        void (*do_wfi)(void);
+        unsigned long *do_wfi_sz;
+        unsigned long *resume_offset;
+        unsigned long *emif_sram_table;
+        unsigned long *ro_sram_data;
+};
+
+struct am33xx_pm_platform_data {
+        int     (*init)(void);
+        int     (*soc_suspend)(unsigned int state, int (*fn)(unsigned long));
+        struct  am33xx_pm_sram_addr *(*get_sram_addrs)(void);
+};
+
+struct am33xx_pm_sram_data {
+        u32 wfi_flags;
+        u32 l2_aux_ctrl_val;
+        u32 l2_prefetch_ctrl_val;
+} __packed __aligned(8);
+
+struct am33xx_pm_ro_sram_data {
+        u32 amx3_pm_sram_data_virt;
+        u32 amx3_pm_sram_data_phys;
+} __packed __aligned(8);
+
+#endif /* __ASSEMBLER__ */
+#endif /* _LINUX_PLATFORM_DATA_PM33XX_H */