OMAP2+: PRM: add register access functions for VC/VP

On OMAP3+, the voltage controller (VC) and voltage processor (VP) are
inside the PRM.  Add some PRM helper functions for register access to
these module registers.

Thanks to Nishanth Menon for finding/fixing a sparse problem.

Cc: Nishanth Menon <nm@ti.com>
Signed-off-by: Kevin Hilman <khilman@ti.com>

arch/arm/mach-omap2/prm2xxx_3xxx.c

@@ -169,7 +169,7 @@ struct omap3_vp {
 	u32 tranxdone_status;
 };
 
-struct omap3_vp omap3_vp[] = {
+static struct omap3_vp omap3_vp[] = {
 	[OMAP3_VP_VDD_MPU_ID] = {
 		.tranxdone_status = OMAP3430_VP1_TRANXDONE_ST_MASK,
 	},
@@ -197,3 +197,18 @@ void omap3_prm_vp_clear_txdone(u8 vp_id)
 	omap2_prm_write_mod_reg(vp->tranxdone_status,
 				OCP_MOD, OMAP3_PRM_IRQSTATUS_MPU_OFFSET);
 }
+
+u32 omap3_prm_vcvp_read(u8 offset)
+{
+	return omap2_prm_read_mod_reg(OMAP3430_GR_MOD, offset);
+}
+
+void omap3_prm_vcvp_write(u32 val, u8 offset)
+{
+	omap2_prm_write_mod_reg(val, OMAP3430_GR_MOD, offset);
+}
+
+u32 omap3_prm_vcvp_rmw(u32 mask, u32 bits, u8 offset)
+{
+	return omap2_prm_rmw_mod_reg_bits(mask, bits, OMAP3430_GR_MOD, offset);
+}

arch/arm/mach-omap2/prm2xxx_3xxx.h

@@ -307,7 +307,15 @@ extern int omap2_prm_deassert_hardreset(s16 prm_mod, u8 rst_shift, u8 st_shift);
 u32 omap3_prm_vp_check_txdone(u8 vp_id);
 void omap3_prm_vp_clear_txdone(u8 vp_id);
 
+/*
+ * OMAP3 access functions for voltage controller (VC) and
+ * voltage proccessor (VP) in the PRM.
+ */
+extern u32 omap3_prm_vcvp_read(u8 offset);
+extern void omap3_prm_vcvp_write(u32 val, u8 offset);
+extern u32 omap3_prm_vcvp_rmw(u32 mask, u32 bits, u8 offset);
 #endif	/* CONFIG_ARCH_OMAP4 */
+
 #endif
 
 /*

arch/arm/mach-omap2/prm44xx.c

@@ -24,6 +24,8 @@
 #include "vp.h"
 #include "prm44xx.h"
 #include "prm-regbits-44xx.h"
+#include "prcm44xx.h"
+#include "prminst44xx.h"
 
 /* PRM low-level functions */
 
@@ -99,3 +101,23 @@ void omap4_prm_vp_clear_txdone(u8 vp_id)
 				     OMAP4430_PRM_OCP_SOCKET_INST,
 				     vp->irqstatus_mpu);
 };
+
+u32 omap4_prm_vcvp_read(u8 offset)
+{
+	return omap4_prminst_read_inst_reg(OMAP4430_PRM_PARTITION,
+					   OMAP4430_PRM_DEVICE_INST, offset);
+}
+
+void omap4_prm_vcvp_write(u32 val, u8 offset)
+{
+	omap4_prminst_write_inst_reg(val, OMAP4430_PRM_PARTITION,
+				     OMAP4430_PRM_DEVICE_INST, offset);
+}
+
+u32 omap4_prm_vcvp_rmw(u32 mask, u32 bits, u8 offset)
+{
+	return omap4_prminst_rmw_inst_reg_bits(mask, bits,
+					       OMAP4430_PRM_PARTITION,
+					       OMAP4430_PRM_DEVICE_INST,
+					       offset);
+}

arch/arm/mach-omap2/prm44xx.h

@@ -755,6 +755,14 @@ extern u32 omap4_prm_rmw_inst_reg_bits(u32 mask, u32 bits, s16 inst, s16 idx);
 u32 omap4_prm_vp_check_txdone(u8 vp_id);
 void omap4_prm_vp_clear_txdone(u8 vp_id);
 
+/*
+ * OMAP4 access functions for voltage controller (VC) and
+ * voltage proccessor (VP) in the PRM.
+ */
+extern u32 omap4_prm_vcvp_read(u8 offset);
+extern void omap4_prm_vcvp_write(u32 val, u8 offset);
+extern u32 omap4_prm_vcvp_rmw(u32 mask, u32 bits, u8 offset);
+
 # endif
 
 #endif