2 * OMAP interface clock support
4 * Copyright (C) 2013 Texas Instruments, Inc.
6 * Tero Kristo <t-kristo@ti.com>
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.
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.
18 #include <linux/clk-provider.h>
19 #include <linux/slab.h>
21 #include <linux/of_address.h>
22 #include <linux/clk/ti.h>
26 #define pr_fmt(fmt) "%s: " fmt, __func__
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,
35 static struct clk *_register_interface(struct device_node *node,
37 const char *parent_name,
38 struct clk_omap_reg *reg, u8 bit_idx,
39 const struct clk_hw_omap_ops *ops)
41 struct clk_init_data init = { NULL };
42 struct clk_hw_omap *clk_hw;
45 clk_hw = kzalloc(sizeof(*clk_hw), GFP_KERNEL);
47 return ERR_PTR(-ENOMEM);
49 clk_hw->hw.init = &init;
51 memcpy(&clk_hw->enable_reg, reg, sizeof(*reg));
52 clk_hw->enable_bit = bit_idx;
55 init.ops = &ti_interface_clk_ops;
59 init.parent_names = &parent_name;
61 clk = of_ti_clk_register_omap_hw(node, &clk_hw->hw, name);
69 static void __init _of_ti_interface_clk_setup(struct device_node *node,
70 const struct clk_hw_omap_ops *ops)
73 const char *parent_name;
74 struct clk_omap_reg reg;
79 if (ti_clk_get_reg_addr(node, 0, ®))
82 if (!of_property_read_u32(node, "ti,bit-shift", &val))
85 parent_name = of_clk_get_parent_name(node, 0);
87 pr_err("%pOFn must have a parent\n", node);
91 name = ti_dt_clk_name(node);
92 clk = _register_interface(node, name, parent_name, ®,
96 of_clk_add_provider(node, of_clk_src_simple_get, clk);
99 static void __init of_ti_interface_clk_setup(struct device_node *node)
101 _of_ti_interface_clk_setup(node, &clkhwops_iclk_wait);
103 CLK_OF_DECLARE(ti_interface_clk, "ti,omap3-interface-clock",
104 of_ti_interface_clk_setup);
106 static void __init of_ti_no_wait_interface_clk_setup(struct device_node *node)
108 _of_ti_interface_clk_setup(node, &clkhwops_iclk);
110 CLK_OF_DECLARE(ti_no_wait_interface_clk, "ti,omap3-no-wait-interface-clock",
111 of_ti_no_wait_interface_clk_setup);
113 #ifdef CONFIG_ARCH_OMAP3
114 static void __init of_ti_hsotgusb_interface_clk_setup(struct device_node *node)
116 _of_ti_interface_clk_setup(node,
117 &clkhwops_omap3430es2_iclk_hsotgusb_wait);
119 CLK_OF_DECLARE(ti_hsotgusb_interface_clk, "ti,omap3-hsotgusb-interface-clock",
120 of_ti_hsotgusb_interface_clk_setup);
122 static void __init of_ti_dss_interface_clk_setup(struct device_node *node)
124 _of_ti_interface_clk_setup(node,
125 &clkhwops_omap3430es2_iclk_dss_usbhost_wait);
127 CLK_OF_DECLARE(ti_dss_interface_clk, "ti,omap3-dss-interface-clock",
128 of_ti_dss_interface_clk_setup);
130 static void __init of_ti_ssi_interface_clk_setup(struct device_node *node)
132 _of_ti_interface_clk_setup(node, &clkhwops_omap3430es2_iclk_ssi_wait);
134 CLK_OF_DECLARE(ti_ssi_interface_clk, "ti,omap3-ssi-interface-clock",
135 of_ti_ssi_interface_clk_setup);
137 static void __init of_ti_am35xx_interface_clk_setup(struct device_node *node)
139 _of_ti_interface_clk_setup(node, &clkhwops_am35xx_ipss_wait);
141 CLK_OF_DECLARE(ti_am35xx_interface_clk, "ti,am35xx-interface-clock",
142 of_ti_am35xx_interface_clk_setup);
145 #ifdef CONFIG_SOC_OMAP2430
146 static void __init of_ti_omap2430_interface_clk_setup(struct device_node *node)
148 _of_ti_interface_clk_setup(node, &clkhwops_omap2430_i2chs_wait);
150 CLK_OF_DECLARE(ti_omap2430_interface_clk, "ti,omap2430-interface-clock",
151 of_ti_omap2430_interface_clk_setup);