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/clock.h>
18 #include <plat/prcm.h>
19
20 #include "clock.h"
21 #include "clock2xxx.h"
22 #include "cm2xxx_3xxx.h"
23 #include "cm-regbits-24xx.h"
24
25 /* Private functions */
26
27 /* XXX */
omap2_clkt_iclk_allow_idle(struct clk * clk)28 void omap2_clkt_iclk_allow_idle(struct clk *clk)
29 {
30 u32 v, r;
31
32 r = ((__force u32)clk->enable_reg ^ (CM_AUTOIDLE ^ CM_ICLKEN));
33
34 v = __raw_readl((__force void __iomem *)r);
35 v |= (1 << clk->enable_bit);
36 __raw_writel(v, (__force void __iomem *)r);
37 }
38
39 /* XXX */
omap2_clkt_iclk_deny_idle(struct clk * clk)40 void omap2_clkt_iclk_deny_idle(struct clk *clk)
41 {
42 u32 v, r;
43
44 r = ((__force u32)clk->enable_reg ^ (CM_AUTOIDLE ^ CM_ICLKEN));
45
46 v = __raw_readl((__force void __iomem *)r);
47 v &= ~(1 << clk->enable_bit);
48 __raw_writel(v, (__force void __iomem *)r);
49 }
50
51 /* Public data */
52
53 const struct clkops clkops_omap2_iclk_dflt_wait = {
54 .enable = omap2_dflt_clk_enable,
55 .disable = omap2_dflt_clk_disable,
56 .find_companion = omap2_clk_dflt_find_companion,
57 .find_idlest = omap2_clk_dflt_find_idlest,
58 .allow_idle = omap2_clkt_iclk_allow_idle,
59 .deny_idle = omap2_clkt_iclk_deny_idle,
60 };
61
62 const struct clkops clkops_omap2_iclk_dflt = {
63 .enable = omap2_dflt_clk_enable,
64 .disable = omap2_dflt_clk_disable,
65 .allow_idle = omap2_clkt_iclk_allow_idle,
66 .deny_idle = omap2_clkt_iclk_deny_idle,
67 };
68
69 const struct clkops clkops_omap2_iclk_idle_only = {
70 .allow_idle = omap2_clkt_iclk_allow_idle,
71 .deny_idle = omap2_clkt_iclk_deny_idle,
72 };
73
74 const struct clkops clkops_omap2_mdmclk_dflt_wait = {
75 .enable = omap2_dflt_clk_enable,
76 .disable = omap2_dflt_clk_disable,
77 .find_companion = omap2_clk_dflt_find_companion,
78 .find_idlest = omap2_clk_dflt_find_idlest,
79 .allow_idle = omap2_clkt_iclk_allow_idle,
80 .deny_idle = omap2_clkt_iclk_deny_idle,
81 };
82
83