OMAP2+: voltage: reorganize, split code from data

This is a first pass at reorganizing mach-omap2/voltage.c:

- Separate almost all of the data from the code of mach-omap2/voltage.c.
  The code remains in mach-omap2/voltage.c.  The data goes into one
  of several places, depending on what type of data it is:

  - Silicon process/validation data: mach-omap2/opp*_data.c
  - VC (Voltage Controller) data: mach-omap2/vc*_data.c
  - VP (Voltage Processor) data: mach-omap2/vp*_data.c
  - Voltage domain data: mach-omap2/voltagedomains*_data.c

  The ultimate goal is for all this data to be autogenerated, the same
  way we autogenerate the rest of our data.

- Separate VC and VP common data from VDD-specific VC and VP data.

- Separate common voltage.c code from SoC-specific code; reuse common code.

- Reorganize structures to avoid unnecessary memory loss due to unpacked
  fields.

There is much left to be done.  VC code and VP code should be separated out
into vc*.c and vp*.c files.  Many fields in the existing structures are
superfluous, and should be removed.  Some code in voltage.c seems to be
duplicated; that code should be moved into functions of its own.  Proper
voltage domain code should be created, as was done with the powerdomain
and clockdomains, and powerdomains should reference voltagedomains.

Thanks to Shweta Gulati <shweta.gulati@ti.com> for comments.  Thanks
to Rajendra Nayak <rnayak@ti.com> for finding and fixing some bugs
that prevented OMAP4 from booting:

   https://patchwork.kernel.org/patch/587311/

His patch has been folded into this one to avoid breaking OMAP4
between patches.  Thanks also to Kevin Hilman <khilman@ti.com> for
finding and fixing a compile problem when !CONFIG_PM:

   http://www.spinics.net/lists/arm-kernel/msg118067.html

His patch has also been folded into this one to avoid breaking
!CONFIG_PM builds.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Shweta Gulati <shweta.gulati@ti.com>
Cc: Rajendra Nayak <rnayak@ti.com>
Cc: Kevin Hilman <khilman@ti.com>

1 files changed, 24 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/omap_opp_data.h b/arch/arm/mach-omap2/omap_opp_data.h
index 46ac27dd6c84..c784c12f98a1 100644
--- a/arch/arm/mach-omap2/omap_opp_data.h
+++ b/arch/arm/mach-omap2/omap_opp_data.h
@@ -21,6 +21,8 @@
 
 #include <plat/omap_hwmod.h>
 
+#include "voltage.h"
+
 /*
  * *BIG FAT WARNING*:
  * USE the following ONLY in opp data initialization common to an SoC.
@@ -65,8 +67,30 @@ struct omap_opp_def {
 	.u_volt		= _uv,					\
 }
 
+/*
+ * Initialization wrapper used to define SmartReflex process data
+ * XXX Is this needed?  Just use C99 initializers in data files?
+ */
+#define VOLT_DATA_DEFINE(_v_nom, _efuse_offs, _errminlimit, _errgain)  \
+{								       \
+	.volt_nominal	= _v_nom,				       \
+	.sr_efuse_offs	= _efuse_offs,				       \
+	.sr_errminlimit = _errminlimit,				       \
+	.vp_errgain	= _errgain				       \
+}
+
 /* Use this to initialize the default table */
 extern int __init omap_init_opp_table(struct omap_opp_def *opp_def,
 		u32 opp_def_size);
 
+
+extern struct omap_volt_data omap34xx_vddmpu_volt_data[];
+extern struct omap_volt_data omap34xx_vddcore_volt_data[];
+extern struct omap_volt_data omap36xx_vddmpu_volt_data[];
+extern struct omap_volt_data omap36xx_vddcore_volt_data[];
+
+extern struct omap_volt_data omap44xx_vdd_mpu_volt_data[];
+extern struct omap_volt_data omap44xx_vdd_iva_volt_data[];
+extern struct omap_volt_data omap44xx_vdd_core_volt_data[];
+
 #endif		/* __ARCH_ARM_MACH_OMAP2_OMAP_OPP_DATA_H */