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