arch/arm/mach-omap2/mcbsp.c

   1 /*
   2  * linux/arch/arm/mach-omap2/mcbsp.c
   3  *
   4  * Copyright (C) 2008 Instituto Nokia de Tecnologia
   5  * Contact: Eduardo Valentin <eduardo.valentin@indt.org.br>
   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  * Multichannel mode not supported.
  12  */
  13 #include <linux/module.h>
  14 #include <linux/init.h>
  15 #include <linux/clk.h>
  16 #include <linux/err.h>
  17 #include <linux/io.h>
  18 #include <linux/of.h>
  19 #include <linux/platform_device.h>
  20 #include <linux/slab.h>
  21 #include <linux/platform_data/asoc-ti-mcbsp.h>
  22 #include <linux/pm_runtime.h>
  23
  24 #include <linux/omap-dma.h>
  25
  26 #include "soc.h"
  27 #include "omap_device.h"
  28 #include "clock.h"
  29
  30 /*
  31  * FIXME: Find a mechanism to enable/disable runtime the McBSP ICLK autoidle.
  32  * Sidetone needs non-gated ICLK and sidetone autoidle is broken.
  33  */
  34 #include "cm3xxx.h"
  35 #include "cm-regbits-34xx.h"
  36
  37 static int omap3_mcbsp_force_ick_on(struct clk *clk, bool force_on)
  38 {
  39         if (!clk)
  40                 return 0;
  41
  42         if (force_on)
  43                 return omap2_clk_deny_idle(clk);
  44         else
  45                 return omap2_clk_allow_idle(clk);
  46 }
  47
  48 void __init omap3_mcbsp_init_pdata_callback(
  49                                         struct omap_mcbsp_platform_data *pdata)
  50 {
  51         if (!pdata)
  52                 return;
  53
  54         pdata->force_ick_on = omap3_mcbsp_force_ick_on;
  55 }