Tero Kristo | 24582b3 | 2013-07-15 13:14:20 +0300 | [diff] [blame] | 1 | /* |
| 2 | * OMAP interface clock support |
| 3 | * |
| 4 | * Copyright (C) 2013 Texas Instruments, Inc. |
| 5 | * |
| 6 | * Tero Kristo <t-kristo@ti.com> |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2 as |
| 10 | * published by the Free Software Foundation. |
| 11 | * |
| 12 | * This program is distributed "as is" WITHOUT ANY WARRANTY of any |
| 13 | * kind, whether express or implied; without even the implied warranty |
| 14 | * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | */ |
| 17 | |
| 18 | #include <linux/clk-provider.h> |
| 19 | #include <linux/slab.h> |
| 20 | #include <linux/of.h> |
| 21 | #include <linux/of_address.h> |
| 22 | #include <linux/clk/ti.h> |
Tero Kristo | 06524fa | 2014-12-16 18:20:49 +0200 | [diff] [blame] | 23 | #include "clock.h" |
Tero Kristo | 24582b3 | 2013-07-15 13:14:20 +0300 | [diff] [blame] | 24 | |
| 25 | #undef pr_fmt |
| 26 | #define pr_fmt(fmt) "%s: " fmt, __func__ |
| 27 | |
| 28 | static const struct clk_ops ti_interface_clk_ops = { |
| 29 | .init = &omap2_init_clk_clkdm, |
| 30 | .enable = &omap2_dflt_clk_enable, |
| 31 | .disable = &omap2_dflt_clk_disable, |
| 32 | .is_enabled = &omap2_dflt_clk_is_enabled, |
| 33 | }; |
| 34 | |
Tero Kristo | 06524fa | 2014-12-16 18:20:49 +0200 | [diff] [blame] | 35 | static struct clk *_register_interface(struct device *dev, const char *name, |
| 36 | const char *parent_name, |
| 37 | void __iomem *reg, u8 bit_idx, |
| 38 | const struct clk_hw_omap_ops *ops) |
Tero Kristo | 24582b3 | 2013-07-15 13:14:20 +0300 | [diff] [blame] | 39 | { |
Tero Kristo | 24582b3 | 2013-07-15 13:14:20 +0300 | [diff] [blame] | 40 | struct clk_init_data init = { NULL }; |
| 41 | struct clk_hw_omap *clk_hw; |
Tero Kristo | 06524fa | 2014-12-16 18:20:49 +0200 | [diff] [blame] | 42 | struct clk *clk; |
Tero Kristo | 24582b3 | 2013-07-15 13:14:20 +0300 | [diff] [blame] | 43 | |
| 44 | clk_hw = kzalloc(sizeof(*clk_hw), GFP_KERNEL); |
| 45 | if (!clk_hw) |
Tero Kristo | 06524fa | 2014-12-16 18:20:49 +0200 | [diff] [blame] | 46 | return ERR_PTR(-ENOMEM); |
Tero Kristo | 24582b3 | 2013-07-15 13:14:20 +0300 | [diff] [blame] | 47 | |
| 48 | clk_hw->hw.init = &init; |
| 49 | clk_hw->ops = ops; |
| 50 | clk_hw->flags = MEMMAP_ADDRESSING; |
Tero Kristo | 06524fa | 2014-12-16 18:20:49 +0200 | [diff] [blame] | 51 | clk_hw->enable_reg = reg; |
| 52 | clk_hw->enable_bit = bit_idx; |
Tero Kristo | 24582b3 | 2013-07-15 13:14:20 +0300 | [diff] [blame] | 53 | |
Tero Kristo | 06524fa | 2014-12-16 18:20:49 +0200 | [diff] [blame] | 54 | init.name = name; |
Tero Kristo | 24582b3 | 2013-07-15 13:14:20 +0300 | [diff] [blame] | 55 | init.ops = &ti_interface_clk_ops; |
| 56 | init.flags = 0; |
| 57 | |
Tero Kristo | 24582b3 | 2013-07-15 13:14:20 +0300 | [diff] [blame] | 58 | init.num_parents = 1; |
| 59 | init.parent_names = &parent_name; |
| 60 | |
| 61 | clk = clk_register(NULL, &clk_hw->hw); |
| 62 | |
Tero Kristo | 06524fa | 2014-12-16 18:20:49 +0200 | [diff] [blame] | 63 | if (IS_ERR(clk)) |
| 64 | kfree(clk_hw); |
| 65 | else |
Stephen Boyd | 98d8a60 | 2015-06-29 16:56:30 -0700 | [diff] [blame] | 66 | omap2_init_clk_hw_omap_clocks(&clk_hw->hw); |
Tero Kristo | 06524fa | 2014-12-16 18:20:49 +0200 | [diff] [blame] | 67 | |
| 68 | return clk; |
| 69 | } |
| 70 | |
Arnd Bergmann | 6793a30a | 2015-02-03 17:59:32 +0100 | [diff] [blame] | 71 | #if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_ATAGS) |
Tero Kristo | 06524fa | 2014-12-16 18:20:49 +0200 | [diff] [blame] | 72 | struct clk *ti_clk_register_interface(struct ti_clk *setup) |
| 73 | { |
| 74 | const struct clk_hw_omap_ops *ops = &clkhwops_iclk_wait; |
| 75 | u32 reg; |
| 76 | struct clk_omap_reg *reg_setup; |
| 77 | struct ti_clk_gate *gate; |
| 78 | |
| 79 | gate = setup->data; |
| 80 | reg_setup = (struct clk_omap_reg *)® |
| 81 | reg_setup->index = gate->module; |
| 82 | reg_setup->offset = gate->reg; |
| 83 | |
| 84 | if (gate->flags & CLKF_NO_WAIT) |
| 85 | ops = &clkhwops_iclk; |
| 86 | |
| 87 | if (gate->flags & CLKF_HSOTGUSB) |
| 88 | ops = &clkhwops_omap3430es2_iclk_hsotgusb_wait; |
| 89 | |
| 90 | if (gate->flags & CLKF_DSS) |
| 91 | ops = &clkhwops_omap3430es2_iclk_dss_usbhost_wait; |
| 92 | |
| 93 | if (gate->flags & CLKF_SSI) |
| 94 | ops = &clkhwops_omap3430es2_iclk_ssi_wait; |
| 95 | |
| 96 | if (gate->flags & CLKF_AM35XX) |
| 97 | ops = &clkhwops_am35xx_ipss_wait; |
| 98 | |
| 99 | return _register_interface(NULL, setup->name, gate->parent, |
| 100 | (void __iomem *)reg, gate->bit_shift, ops); |
| 101 | } |
Arnd Bergmann | 6793a30a | 2015-02-03 17:59:32 +0100 | [diff] [blame] | 102 | #endif |
Tero Kristo | 06524fa | 2014-12-16 18:20:49 +0200 | [diff] [blame] | 103 | |
| 104 | static void __init _of_ti_interface_clk_setup(struct device_node *node, |
| 105 | const struct clk_hw_omap_ops *ops) |
| 106 | { |
| 107 | struct clk *clk; |
| 108 | const char *parent_name; |
| 109 | void __iomem *reg; |
| 110 | u8 enable_bit = 0; |
| 111 | u32 val; |
| 112 | |
| 113 | reg = ti_clk_get_reg_addr(node, 0); |
Tero Kristo | c807dbe | 2015-02-23 21:06:08 +0200 | [diff] [blame] | 114 | if (IS_ERR(reg)) |
Tero Kristo | 06524fa | 2014-12-16 18:20:49 +0200 | [diff] [blame] | 115 | return; |
| 116 | |
| 117 | if (!of_property_read_u32(node, "ti,bit-shift", &val)) |
| 118 | enable_bit = val; |
| 119 | |
| 120 | parent_name = of_clk_get_parent_name(node, 0); |
| 121 | if (!parent_name) { |
| 122 | pr_err("%s must have a parent\n", node->name); |
Tero Kristo | 24582b3 | 2013-07-15 13:14:20 +0300 | [diff] [blame] | 123 | return; |
| 124 | } |
| 125 | |
Tero Kristo | 06524fa | 2014-12-16 18:20:49 +0200 | [diff] [blame] | 126 | clk = _register_interface(NULL, node->name, parent_name, reg, |
| 127 | enable_bit, ops); |
| 128 | |
| 129 | if (!IS_ERR(clk)) |
| 130 | of_clk_add_provider(node, of_clk_src_simple_get, clk); |
Tero Kristo | 24582b3 | 2013-07-15 13:14:20 +0300 | [diff] [blame] | 131 | } |
| 132 | |
| 133 | static void __init of_ti_interface_clk_setup(struct device_node *node) |
| 134 | { |
| 135 | _of_ti_interface_clk_setup(node, &clkhwops_iclk_wait); |
| 136 | } |
| 137 | CLK_OF_DECLARE(ti_interface_clk, "ti,omap3-interface-clock", |
| 138 | of_ti_interface_clk_setup); |
| 139 | |
| 140 | static void __init of_ti_no_wait_interface_clk_setup(struct device_node *node) |
| 141 | { |
| 142 | _of_ti_interface_clk_setup(node, &clkhwops_iclk); |
| 143 | } |
| 144 | CLK_OF_DECLARE(ti_no_wait_interface_clk, "ti,omap3-no-wait-interface-clock", |
| 145 | of_ti_no_wait_interface_clk_setup); |
| 146 | |
Tero Kristo | de74257 | 2014-02-25 19:16:07 +0200 | [diff] [blame] | 147 | #ifdef CONFIG_ARCH_OMAP3 |
Tero Kristo | 24582b3 | 2013-07-15 13:14:20 +0300 | [diff] [blame] | 148 | static void __init of_ti_hsotgusb_interface_clk_setup(struct device_node *node) |
| 149 | { |
| 150 | _of_ti_interface_clk_setup(node, |
| 151 | &clkhwops_omap3430es2_iclk_hsotgusb_wait); |
| 152 | } |
| 153 | CLK_OF_DECLARE(ti_hsotgusb_interface_clk, "ti,omap3-hsotgusb-interface-clock", |
| 154 | of_ti_hsotgusb_interface_clk_setup); |
| 155 | |
| 156 | static void __init of_ti_dss_interface_clk_setup(struct device_node *node) |
| 157 | { |
| 158 | _of_ti_interface_clk_setup(node, |
| 159 | &clkhwops_omap3430es2_iclk_dss_usbhost_wait); |
| 160 | } |
| 161 | CLK_OF_DECLARE(ti_dss_interface_clk, "ti,omap3-dss-interface-clock", |
| 162 | of_ti_dss_interface_clk_setup); |
| 163 | |
| 164 | static void __init of_ti_ssi_interface_clk_setup(struct device_node *node) |
| 165 | { |
| 166 | _of_ti_interface_clk_setup(node, &clkhwops_omap3430es2_iclk_ssi_wait); |
| 167 | } |
| 168 | CLK_OF_DECLARE(ti_ssi_interface_clk, "ti,omap3-ssi-interface-clock", |
| 169 | of_ti_ssi_interface_clk_setup); |
| 170 | |
| 171 | static void __init of_ti_am35xx_interface_clk_setup(struct device_node *node) |
| 172 | { |
| 173 | _of_ti_interface_clk_setup(node, &clkhwops_am35xx_ipss_wait); |
| 174 | } |
| 175 | CLK_OF_DECLARE(ti_am35xx_interface_clk, "ti,am35xx-interface-clock", |
| 176 | of_ti_am35xx_interface_clk_setup); |
Tero Kristo | de74257 | 2014-02-25 19:16:07 +0200 | [diff] [blame] | 177 | #endif |
| 178 | |
| 179 | #ifdef CONFIG_SOC_OMAP2430 |
| 180 | static void __init of_ti_omap2430_interface_clk_setup(struct device_node *node) |
| 181 | { |
| 182 | _of_ti_interface_clk_setup(node, &clkhwops_omap2430_i2chs_wait); |
| 183 | } |
| 184 | CLK_OF_DECLARE(ti_omap2430_interface_clk, "ti,omap2430-interface-clock", |
| 185 | of_ti_omap2430_interface_clk_setup); |
| 186 | #endif |