arch/arm/mach-pxa/clock-pxa2xx.c

   1 /*
   2  * linux/arch/arm/mach-pxa/clock-pxa2xx.c
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  */
   8
   9 #include <linux/module.h>
  10 #include <linux/kernel.h>
  11 #include <linux/init.h>
  12 #include <linux/io.h>
  13 #include <linux/syscore_ops.h>
  14
  15 #include <mach/pxa2xx-regs.h>
  16
  17 #include "clock.h"
  18
  19 void clk_pxa2xx_cken_enable(struct clk *clk)
  20 {
  21         CKEN |= 1 << clk->cken;
  22 }
  23
  24 void clk_pxa2xx_cken_disable(struct clk *clk)
  25 {
  26         CKEN &= ~(1 << clk->cken);
  27 }
  28
  29 const struct clkops clk_pxa2xx_cken_ops = {
  30         .enable         = clk_pxa2xx_cken_enable,
  31         .disable        = clk_pxa2xx_cken_disable,
  32 };
  33
  34 #ifdef CONFIG_PM
  35 static uint32_t saved_cken;
  36
  37 static int pxa2xx_clock_suspend(void)
  38 {
  39         saved_cken = CKEN;
  40         return 0;
  41 }
  42
  43 static void pxa2xx_clock_resume(void)
  44 {
  45         CKEN = saved_cken;
  46 }
  47 #else
  48 #define pxa2xx_clock_suspend    NULL
  49 #define pxa2xx_clock_resume     NULL
  50 #endif
  51
  52 struct syscore_ops pxa2xx_clock_syscore_ops = {
  53         .suspend        = pxa2xx_clock_suspend,
  54         .resume         = pxa2xx_clock_resume,
  55 };