arch/arm/mach-omap2/prcm_mpu44xx.c

   1 /*
   2  * OMAP4 PRCM_MPU module functions
   3  *
   4  * Copyright (C) 2009 Nokia Corporation
   5  * Paul Walmsley
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #include <linux/kernel.h>
  13 #include <linux/types.h>
  14 #include <linux/errno.h>
  15 #include <linux/err.h>
  16 #include <linux/io.h>
  17
  18 #include "iomap.h"
  19 #include "common.h"
  20 #include "prcm_mpu44xx.h"
  21 #include "cm-regbits-44xx.h"
  22
  23 /*
  24  * prcm_mpu_base: the virtual address of the start of the PRCM_MPU IP
  25  *   block registers
  26  */
  27 void __iomem *prcm_mpu_base;
  28
  29 /* PRCM_MPU low-level functions */
  30
  31 u32 omap4_prcm_mpu_read_inst_reg(s16 inst, u16 reg)
  32 {
  33         return readl_relaxed(OMAP44XX_PRCM_MPU_REGADDR(inst, reg));
  34 }
  35
  36 void omap4_prcm_mpu_write_inst_reg(u32 val, s16 inst, u16 reg)
  37 {
  38         writel_relaxed(val, OMAP44XX_PRCM_MPU_REGADDR(inst, reg));
  39 }
  40
  41 u32 omap4_prcm_mpu_rmw_inst_reg_bits(u32 mask, u32 bits, s16 inst, s16 reg)
  42 {
  43         u32 v;
  44
  45         v = omap4_prcm_mpu_read_inst_reg(inst, reg);
  46         v &= ~mask;
  47         v |= bits;
  48         omap4_prcm_mpu_write_inst_reg(v, inst, reg);
  49
  50         return v;
  51 }
  52
  53 /**
  54  * omap2_set_globals_prcm_mpu - set the MPU PRCM base address (for early use)
  55  * @prcm_mpu: PRCM_MPU base virtual address
  56  *
  57  * XXX Will be replaced when the PRM/CM drivers are completed.
  58  */
  59 void __init omap2_set_globals_prcm_mpu(void __iomem *prcm_mpu)
  60 {
  61         prcm_mpu_base = prcm_mpu;
  62 }