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02e19a96 PW |
1 | /* |
2 | * OMAP3-specific clock framework functions | |
3 | * | |
542313cc | 4 | * Copyright (C) 2007-2008 Texas Instruments, Inc. |
ec538e30 | 5 | * Copyright (C) 2007-2011 Nokia Corporation |
02e19a96 | 6 | * |
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7 | * Paul Walmsley |
8 | * Jouni Högander | |
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9 | * |
10 | * Parts of this code are based on code written by | |
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11 | * Richard Woodruff, Tony Lindgren, Tuukka Tikkanen, Karthik Dasu, |
12 | * Russell King | |
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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 | ||
02e19a96 | 20 | #include <linux/kernel.h> |
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21 | #include <linux/clk.h> |
22 | #include <linux/io.h> | |
23 | ||
02e19a96 | 24 | #include "clock.h" |
82e9bd58 | 25 | #include "clock34xx.h" |
ff4ae5d9 | 26 | #include "cm3xxx.h" |
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27 | #include "cm-regbits-34xx.h" |
28 | ||
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29 | /** |
30 | * omap3430es2_clk_ssi_find_idlest - return CM_IDLEST info for SSI | |
31 | * @clk: struct clk * being enabled | |
32 | * @idlest_reg: void __iomem ** to store CM_IDLEST reg address into | |
33 | * @idlest_bit: pointer to a u8 to store the CM_IDLEST bit shift into | |
419cc97d | 34 | * @idlest_val: pointer to a u8 to store the CM_IDLEST indicator |
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35 | * |
36 | * The OMAP3430ES2 SSI target CM_IDLEST bit is at a different shift | |
37 | * from the CM_{I,F}CLKEN bit. Pass back the correct info via | |
38 | * @idlest_reg and @idlest_bit. No return value. | |
39 | */ | |
b4777a21 | 40 | static void omap3430es2_clk_ssi_find_idlest(struct clk_hw_omap *clk, |
3c82e229 | 41 | void __iomem **idlest_reg, |
419cc97d RL |
42 | u8 *idlest_bit, |
43 | u8 *idlest_val) | |
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44 | { |
45 | u32 r; | |
46 | ||
47 | r = (((__force u32)clk->enable_reg & ~0xf0) | 0x20); | |
48 | *idlest_reg = (__force void __iomem *)r; | |
49 | *idlest_bit = OMAP3430ES2_ST_SSI_IDLE_SHIFT; | |
419cc97d | 50 | *idlest_val = OMAP34XX_CM_IDLEST_VAL; |
3c82e229 | 51 | } |
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52 | const struct clk_hw_omap_ops clkhwops_omap3430es2_ssi_wait = { |
53 | .find_idlest = omap3430es2_clk_ssi_find_idlest, | |
54 | .find_companion = omap2_clk_dflt_find_companion, | |
55 | }; | |
3c82e229 | 56 | |
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57 | const struct clk_hw_omap_ops clkhwops_omap3430es2_iclk_ssi_wait = { |
58 | .allow_idle = omap2_clkt_iclk_allow_idle, | |
59 | .deny_idle = omap2_clkt_iclk_deny_idle, | |
60 | .find_idlest = omap3430es2_clk_ssi_find_idlest, | |
61 | .find_companion = omap2_clk_dflt_find_companion, | |
62 | }; | |
ec538e30 | 63 | |
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64 | /** |
65 | * omap3430es2_clk_dss_usbhost_find_idlest - CM_IDLEST info for DSS, USBHOST | |
66 | * @clk: struct clk * being enabled | |
67 | * @idlest_reg: void __iomem ** to store CM_IDLEST reg address into | |
68 | * @idlest_bit: pointer to a u8 to store the CM_IDLEST bit shift into | |
419cc97d | 69 | * @idlest_val: pointer to a u8 to store the CM_IDLEST indicator |
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70 | * |
71 | * Some OMAP modules on OMAP3 ES2+ chips have both initiator and | |
72 | * target IDLEST bits. For our purposes, we are concerned with the | |
73 | * target IDLEST bits, which exist at a different bit position than | |
74 | * the *CLKEN bit position for these modules (DSS and USBHOST) (The | |
75 | * default find_idlest code assumes that they are at the same | |
76 | * position.) No return value. | |
77 | */ | |
b4777a21 | 78 | static void omap3430es2_clk_dss_usbhost_find_idlest(struct clk_hw_omap *clk, |
3c82e229 | 79 | void __iomem **idlest_reg, |
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80 | u8 *idlest_bit, |
81 | u8 *idlest_val) | |
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82 | { |
83 | u32 r; | |
84 | ||
85 | r = (((__force u32)clk->enable_reg & ~0xf0) | 0x20); | |
86 | *idlest_reg = (__force void __iomem *)r; | |
87 | /* USBHOST_IDLE has same shift */ | |
88 | *idlest_bit = OMAP3430ES2_ST_DSS_IDLE_SHIFT; | |
419cc97d | 89 | *idlest_val = OMAP34XX_CM_IDLEST_VAL; |
3c82e229 | 90 | } |
25f4214e | 91 | |
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92 | const struct clk_hw_omap_ops clkhwops_omap3430es2_dss_usbhost_wait = { |
93 | .find_idlest = omap3430es2_clk_dss_usbhost_find_idlest, | |
94 | .find_companion = omap2_clk_dflt_find_companion, | |
95 | }; | |
3c82e229 | 96 | |
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97 | const struct clk_hw_omap_ops clkhwops_omap3430es2_iclk_dss_usbhost_wait = { |
98 | .allow_idle = omap2_clkt_iclk_allow_idle, | |
99 | .deny_idle = omap2_clkt_iclk_deny_idle, | |
100 | .find_idlest = omap3430es2_clk_dss_usbhost_find_idlest, | |
101 | .find_companion = omap2_clk_dflt_find_companion, | |
102 | }; | |
ec538e30 | 103 | |
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104 | /** |
105 | * omap3430es2_clk_hsotgusb_find_idlest - return CM_IDLEST info for HSOTGUSB | |
106 | * @clk: struct clk * being enabled | |
107 | * @idlest_reg: void __iomem ** to store CM_IDLEST reg address into | |
108 | * @idlest_bit: pointer to a u8 to store the CM_IDLEST bit shift into | |
419cc97d | 109 | * @idlest_val: pointer to a u8 to store the CM_IDLEST indicator |
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110 | * |
111 | * The OMAP3430ES2 HSOTGUSB target CM_IDLEST bit is at a different | |
112 | * shift from the CM_{I,F}CLKEN bit. Pass back the correct info via | |
113 | * @idlest_reg and @idlest_bit. No return value. | |
114 | */ | |
b4777a21 | 115 | static void omap3430es2_clk_hsotgusb_find_idlest(struct clk_hw_omap *clk, |
3c82e229 | 116 | void __iomem **idlest_reg, |
419cc97d RL |
117 | u8 *idlest_bit, |
118 | u8 *idlest_val) | |
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119 | { |
120 | u32 r; | |
121 | ||
122 | r = (((__force u32)clk->enable_reg & ~0xf0) | 0x20); | |
123 | *idlest_reg = (__force void __iomem *)r; | |
124 | *idlest_bit = OMAP3430ES2_ST_HSOTGUSB_IDLE_SHIFT; | |
419cc97d | 125 | *idlest_val = OMAP34XX_CM_IDLEST_VAL; |
3c82e229 | 126 | } |
25f4214e | 127 | |
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128 | const struct clk_hw_omap_ops clkhwops_omap3430es2_iclk_hsotgusb_wait = { |
129 | .allow_idle = omap2_clkt_iclk_allow_idle, | |
130 | .deny_idle = omap2_clkt_iclk_deny_idle, | |
131 | .find_idlest = omap3430es2_clk_hsotgusb_find_idlest, | |
132 | .find_companion = omap2_clk_dflt_find_companion, | |
133 | }; | |
3c82e229 | 134 | |
b4777a21 RN |
135 | const struct clk_hw_omap_ops clkhwops_omap3430es2_hsotgusb_wait = { |
136 | .find_idlest = omap3430es2_clk_hsotgusb_find_idlest, | |
137 | .find_companion = omap2_clk_dflt_find_companion, | |
138 | }; |