]>
Commit | Line | Data |
---|---|---|
530e544f PW |
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> | |
32cc0021 | 14 | #include <linux/clk-provider.h> |
530e544f | 15 | #include <linux/io.h> |
ef14db09 | 16 | #include <linux/clk/ti.h> |
530e544f | 17 | |
530e544f | 18 | #include "clock.h" |
acd052bb TK |
19 | |
20 | /* Register offsets */ | |
d5a04ddd | 21 | #define OMAP24XX_CM_FCLKEN2 0x04 |
acd052bb TK |
22 | #define CM_AUTOIDLE 0x30 |
23 | #define CM_ICLKEN 0x10 | |
d5a04ddd TK |
24 | #define CM_IDLEST 0x20 |
25 | ||
26 | #define OMAP24XX_CM_IDLEST_VAL 0 | |
530e544f PW |
27 | |
28 | /* Private functions */ | |
29 | ||
30 | /* XXX */ | |
b4777a21 | 31 | void omap2_clkt_iclk_allow_idle(struct clk_hw_omap *clk) |
530e544f | 32 | { |
519ab8b2 TK |
33 | u32 v; |
34 | void __iomem *r; | |
530e544f | 35 | |
519ab8b2 TK |
36 | r = (__force void __iomem *) |
37 | ((__force u32)clk->enable_reg ^ (CM_AUTOIDLE ^ CM_ICLKEN)); | |
530e544f | 38 | |
ef14db09 | 39 | v = ti_clk_ll_ops->clk_readl(r); |
530e544f | 40 | v |= (1 << clk->enable_bit); |
ef14db09 | 41 | ti_clk_ll_ops->clk_writel(v, r); |
530e544f PW |
42 | } |
43 | ||
44 | /* XXX */ | |
b4777a21 | 45 | void omap2_clkt_iclk_deny_idle(struct clk_hw_omap *clk) |
530e544f | 46 | { |
519ab8b2 TK |
47 | u32 v; |
48 | void __iomem *r; | |
530e544f | 49 | |
519ab8b2 TK |
50 | r = (__force void __iomem *) |
51 | ((__force u32)clk->enable_reg ^ (CM_AUTOIDLE ^ CM_ICLKEN)); | |
530e544f | 52 | |
ef14db09 | 53 | v = ti_clk_ll_ops->clk_readl(r); |
530e544f | 54 | v &= ~(1 << clk->enable_bit); |
ef14db09 | 55 | ti_clk_ll_ops->clk_writel(v, r); |
530e544f PW |
56 | } |
57 | ||
d5a04ddd TK |
58 | /** |
59 | * omap2430_clk_i2chs_find_idlest - return CM_IDLEST info for 2430 I2CHS | |
60 | * @clk: struct clk * being enabled | |
61 | * @idlest_reg: void __iomem ** to store CM_IDLEST reg address into | |
62 | * @idlest_bit: pointer to a u8 to store the CM_IDLEST bit shift into | |
63 | * @idlest_val: pointer to a u8 to store the CM_IDLEST indicator | |
64 | * | |
65 | * OMAP2430 I2CHS CM_IDLEST bits are in CM_IDLEST1_CORE, but the | |
66 | * CM_*CLKEN bits are in CM_{I,F}CLKEN2_CORE. This custom function | |
67 | * passes back the correct CM_IDLEST register address for I2CHS | |
68 | * modules. No return value. | |
69 | */ | |
70 | static void omap2430_clk_i2chs_find_idlest(struct clk_hw_omap *clk, | |
71 | void __iomem **idlest_reg, | |
72 | u8 *idlest_bit, | |
73 | u8 *idlest_val) | |
74 | { | |
75 | u32 r; | |
76 | ||
77 | r = ((__force u32)clk->enable_reg ^ (OMAP24XX_CM_FCLKEN2 ^ CM_IDLEST)); | |
78 | *idlest_reg = (__force void __iomem *)r; | |
79 | *idlest_bit = clk->enable_bit; | |
80 | *idlest_val = OMAP24XX_CM_IDLEST_VAL; | |
81 | } | |
82 | ||
530e544f PW |
83 | /* Public data */ |
84 | ||
b4777a21 RN |
85 | const struct clk_hw_omap_ops clkhwops_iclk = { |
86 | .allow_idle = omap2_clkt_iclk_allow_idle, | |
87 | .deny_idle = omap2_clkt_iclk_deny_idle, | |
88 | }; | |
89 | ||
32cc0021 MT |
90 | const struct clk_hw_omap_ops clkhwops_iclk_wait = { |
91 | .allow_idle = omap2_clkt_iclk_allow_idle, | |
92 | .deny_idle = omap2_clkt_iclk_deny_idle, | |
93 | .find_idlest = omap2_clk_dflt_find_idlest, | |
94 | .find_companion = omap2_clk_dflt_find_companion, | |
95 | }; | |
d5a04ddd TK |
96 | |
97 | /* 2430 I2CHS has non-standard IDLEST register */ | |
98 | const struct clk_hw_omap_ops clkhwops_omap2430_i2chs_wait = { | |
99 | .find_idlest = omap2430_clk_i2chs_find_idlest, | |
100 | .find_companion = omap2_clk_dflt_find_companion, | |
101 | }; |