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 #include "clock.h"
18
19 /* Register offsets */
20 #define CM_AUTOIDLE 0x30
21 #define CM_ICLKEN 0x10
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;
29 void __iomem *r;
30
31 r = (__force void __iomem *)
32 ((__force u32)clk->enable_reg ^ (CM_AUTOIDLE ^ CM_ICLKEN));
33
34 v = omap2_clk_readl(clk, r);
35 v |= (1 << clk->enable_bit);
36 omap2_clk_writel(v, clk, r);
37 }
38
39 /* XXX */
omap2_clkt_iclk_deny_idle(struct clk_hw_omap * clk)40 void omap2_clkt_iclk_deny_idle(struct clk_hw_omap *clk)
41 {
42 u32 v;
43 void __iomem *r;
44
45 r = (__force void __iomem *)
46 ((__force u32)clk->enable_reg ^ (CM_AUTOIDLE ^ CM_ICLKEN));
47
48 v = omap2_clk_readl(clk, r);
49 v &= ~(1 << clk->enable_bit);
50 omap2_clk_writel(v, clk, r);
51 }
52
53 /* Public data */
54
55 const struct clk_hw_omap_ops clkhwops_iclk = {
56 .allow_idle = omap2_clkt_iclk_allow_idle,
57 .deny_idle = omap2_clkt_iclk_deny_idle,
58 };
59
60 const struct clk_hw_omap_ops clkhwops_iclk_wait = {
61 .allow_idle = omap2_clkt_iclk_allow_idle,
62 .deny_idle = omap2_clkt_iclk_deny_idle,
63 .find_idlest = omap2_clk_dflt_find_idlest,
64 .find_companion = omap2_clk_dflt_find_companion,
65 };
66
67
68
69