arch/arm/mach-omap2/clkt_iclk.c

   1 /*
   2  * OMAP2/3 interface clock control
   3  *
   4  * Copyright (C) 2011 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 #undef DEBUG
  12
  13 #include <linux/kernel.h>
  14 #include <linux/clk.h>
  15 #include <linux/io.h>
  16
  17 #include <plat/prcm.h>
  18
  19 #include "clock.h"
  20 #include "clock2xxx.h"
  21 #include "cm2xxx_3xxx.h"
  22 #include "cm-regbits-24xx.h"
  23
  24 /* Private functions */
  25
  26 /* XXX */
  27 void omap2_clkt_iclk_allow_idle(struct clk *clk)
  28 {
  29         u32 v, r;
  30
  31         r = ((__force u32)clk->enable_reg ^ (CM_AUTOIDLE ^ CM_ICLKEN));
  32
  33         v = __raw_readl((__force void __iomem *)r);
  34         v |= (1 << clk->enable_bit);
  35         __raw_writel(v, (__force void __iomem *)r);
  36 }
  37
  38 /* XXX */
  39 void omap2_clkt_iclk_deny_idle(struct clk *clk)
  40 {
  41         u32 v, r;
  42
  43         r = ((__force u32)clk->enable_reg ^ (CM_AUTOIDLE ^ CM_ICLKEN));
  44
  45         v = __raw_readl((__force void __iomem *)r);
  46         v &= ~(1 << clk->enable_bit);
  47         __raw_writel(v, (__force void __iomem *)r);
  48 }
  49
  50 /* Public data */
  51
  52 const struct clkops clkops_omap2_iclk_dflt_wait = {
  53         .enable         = omap2_dflt_clk_enable,
  54         .disable        = omap2_dflt_clk_disable,
  55         .find_companion = omap2_clk_dflt_find_companion,
  56         .find_idlest    = omap2_clk_dflt_find_idlest,
  57         .allow_idle     = omap2_clkt_iclk_allow_idle,
  58         .deny_idle      = omap2_clkt_iclk_deny_idle,
  59 };
  60
  61 const struct clkops clkops_omap2_iclk_dflt = {
  62         .enable         = omap2_dflt_clk_enable,
  63         .disable        = omap2_dflt_clk_disable,
  64         .allow_idle     = omap2_clkt_iclk_allow_idle,
  65         .deny_idle      = omap2_clkt_iclk_deny_idle,
  66 };
  67
  68 const struct clkops clkops_omap2_iclk_idle_only = {
  69         .allow_idle     = omap2_clkt_iclk_allow_idle,
  70         .deny_idle      = omap2_clkt_iclk_deny_idle,
  71 };
  72
  73 const struct clkops clkops_omap2_mdmclk_dflt_wait = {
  74         .enable         = omap2_dflt_clk_enable,
  75         .disable        = omap2_dflt_clk_disable,
  76         .find_companion = omap2_clk_dflt_find_companion,
  77         .find_idlest    = omap2_clk_dflt_find_idlest,
  78         .allow_idle     = omap2_clkt_iclk_allow_idle,
  79         .deny_idle      = omap2_clkt_iclk_deny_idle,
  80 };
  81