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-provider.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 */
omap2_clkt_iclk_allow_idle(struct clk_hw_omap * clk)26 void omap2_clkt_iclk_allow_idle(struct clk_hw_omap *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 */
omap2_clkt_iclk_deny_idle(struct clk_hw_omap * clk)38 void omap2_clkt_iclk_deny_idle(struct clk_hw_omap *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 clk_hw_omap_ops clkhwops_iclk = {
52 .allow_idle = omap2_clkt_iclk_allow_idle,
53 .deny_idle = omap2_clkt_iclk_deny_idle,
54 };
55
56 const struct clk_hw_omap_ops clkhwops_iclk_wait = {
57 .allow_idle = omap2_clkt_iclk_allow_idle,
58 .deny_idle = omap2_clkt_iclk_deny_idle,
59 .find_idlest = omap2_clk_dflt_find_idlest,
60 .find_companion = omap2_clk_dflt_find_companion,
61 };
62
63
64
65