1/*
 2 * clock2430.c - OMAP2430-specific clock integration code
 3 *
 4 * Copyright (C) 2005-2008 Texas Instruments, Inc.
 5 * Copyright (C) 2004-2010 Nokia Corporation
 6 *
 7 * Contacts:
 8 * Richard Woodruff <r-woodruff2@ti.com>
 9 * Paul Walmsley
10 *
11 * Based on earlier work by Tuukka Tikkanen, Tony Lindgren,
12 * Gordon McNutt and RidgeRun, Inc.
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License version 2 as
16 * published by the Free Software Foundation.
17 */
18#undef DEBUG
19
20#include <linux/kernel.h>
21#include <linux/clk.h>
22#include <linux/io.h>
23
24#include <plat/hardware.h>
25#include <plat/clock.h>
26
27#include "iomap.h"
28#include "clock.h"
29#include "clock2xxx.h"
30#include "cm2xxx_3xxx.h"
31#include "cm-regbits-24xx.h"
32
33/**
34 * omap2430_clk_i2chs_find_idlest - return CM_IDLEST info for 2430 I2CHS
35 * @clk: struct clk * being enabled
36 * @idlest_reg: void __iomem ** to store CM_IDLEST reg address into
37 * @idlest_bit: pointer to a u8 to store the CM_IDLEST bit shift into
38 * @idlest_val: pointer to a u8 to store the CM_IDLEST indicator
39 *
40 * OMAP2430 I2CHS CM_IDLEST bits are in CM_IDLEST1_CORE, but the
41 * CM_*CLKEN bits are in CM_{I,F}CLKEN2_CORE.  This custom function
42 * passes back the correct CM_IDLEST register address for I2CHS
43 * modules.  No return value.
44 */
45static void omap2430_clk_i2chs_find_idlest(struct clk *clk,
46					   void __iomem **idlest_reg,
47					   u8 *idlest_bit,
48					   u8 *idlest_val)
49{
50	*idlest_reg = OMAP2430_CM_REGADDR(CORE_MOD, CM_IDLEST);
51	*idlest_bit = clk->enable_bit;
52	*idlest_val = OMAP24XX_CM_IDLEST_VAL;
53}
54
55/* 2430 I2CHS has non-standard IDLEST register */
56const struct clkops clkops_omap2430_i2chs_wait = {
57	.enable		= omap2_dflt_clk_enable,
58	.disable	= omap2_dflt_clk_disable,
59	.find_idlest	= omap2430_clk_i2chs_find_idlest,
60	.find_companion = omap2_clk_dflt_find_companion,
61};