1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * OMAP interface clock support 4 * 5 * Copyright (C) 2013 Texas Instruments, Inc. 6 * 7 * Tero Kristo <t-kristo@ti.com> 8 */ 9 10 #include <linux/clk-provider.h> 11 #include <linux/slab.h> 12 #include <linux/of.h> 13 #include <linux/of_address.h> 14 #include <linux/clk/ti.h> 15 #include "clock.h" 16 17 #undef pr_fmt 18 #define pr_fmt(fmt) "%s: " fmt, __func__ 19 20 static const struct clk_ops ti_interface_clk_ops = { 21 .init = &omap2_init_clk_clkdm, 22 .enable = &omap2_dflt_clk_enable, 23 .disable = &omap2_dflt_clk_disable, 24 .is_enabled = &omap2_dflt_clk_is_enabled, 25 }; 26 27 static struct clk *_register_interface(struct device_node *node, 28 const char *name, 29 const char *parent_name, 30 struct clk_omap_reg *reg, u8 bit_idx, 31 const struct clk_hw_omap_ops *ops) 32 { 33 struct clk_init_data init = { NULL }; 34 struct clk_hw_omap *clk_hw; 35 struct clk *clk; 36 37 clk_hw = kzalloc(sizeof(*clk_hw), GFP_KERNEL); 38 if (!clk_hw) 39 return ERR_PTR(-ENOMEM); 40 41 clk_hw->hw.init = &init; 42 clk_hw->ops = ops; 43 memcpy(&clk_hw->enable_reg, reg, sizeof(*reg)); 44 clk_hw->enable_bit = bit_idx; 45 46 init.name = name; 47 init.ops = &ti_interface_clk_ops; 48 init.flags = 0; 49 50 init.num_parents = 1; 51 init.parent_names = &parent_name; 52 53 clk = of_ti_clk_register_omap_hw(node, &clk_hw->hw, name); 54 55 if (IS_ERR(clk)) 56 kfree(clk_hw); 57 58 return clk; 59 } 60 61 static void __init _of_ti_interface_clk_setup(struct device_node *node, 62 const struct clk_hw_omap_ops *ops) 63 { 64 struct clk *clk; 65 const char *parent_name; 66 struct clk_omap_reg reg; 67 u8 enable_bit = 0; 68 const char *name; 69 u32 val; 70 71 if (ti_clk_get_reg_addr(node, 0, ®)) 72 return; 73 74 if (!of_property_read_u32(node, "ti,bit-shift", &val)) 75 enable_bit = val; 76 77 parent_name = of_clk_get_parent_name(node, 0); 78 if (!parent_name) { 79 pr_err("%pOFn must have a parent\n", node); 80 return; 81 } 82 83 name = ti_dt_clk_name(node); 84 clk = _register_interface(node, name, parent_name, ®, 85 enable_bit, ops); 86 87 if (!IS_ERR(clk)) 88 of_clk_add_provider(node, of_clk_src_simple_get, clk); 89 } 90 91 static void __init of_ti_interface_clk_setup(struct device_node *node) 92 { 93 _of_ti_interface_clk_setup(node, &clkhwops_iclk_wait); 94 } 95 CLK_OF_DECLARE(ti_interface_clk, "ti,omap3-interface-clock", 96 of_ti_interface_clk_setup); 97 98 static void __init of_ti_no_wait_interface_clk_setup(struct device_node *node) 99 { 100 _of_ti_interface_clk_setup(node, &clkhwops_iclk); 101 } 102 CLK_OF_DECLARE(ti_no_wait_interface_clk, "ti,omap3-no-wait-interface-clock", 103 of_ti_no_wait_interface_clk_setup); 104 105 #ifdef CONFIG_ARCH_OMAP3 106 static void __init of_ti_hsotgusb_interface_clk_setup(struct device_node *node) 107 { 108 _of_ti_interface_clk_setup(node, 109 &clkhwops_omap3430es2_iclk_hsotgusb_wait); 110 } 111 CLK_OF_DECLARE(ti_hsotgusb_interface_clk, "ti,omap3-hsotgusb-interface-clock", 112 of_ti_hsotgusb_interface_clk_setup); 113 114 static void __init of_ti_dss_interface_clk_setup(struct device_node *node) 115 { 116 _of_ti_interface_clk_setup(node, 117 &clkhwops_omap3430es2_iclk_dss_usbhost_wait); 118 } 119 CLK_OF_DECLARE(ti_dss_interface_clk, "ti,omap3-dss-interface-clock", 120 of_ti_dss_interface_clk_setup); 121 122 static void __init of_ti_ssi_interface_clk_setup(struct device_node *node) 123 { 124 _of_ti_interface_clk_setup(node, &clkhwops_omap3430es2_iclk_ssi_wait); 125 } 126 CLK_OF_DECLARE(ti_ssi_interface_clk, "ti,omap3-ssi-interface-clock", 127 of_ti_ssi_interface_clk_setup); 128 129 static void __init of_ti_am35xx_interface_clk_setup(struct device_node *node) 130 { 131 _of_ti_interface_clk_setup(node, &clkhwops_am35xx_ipss_wait); 132 } 133 CLK_OF_DECLARE(ti_am35xx_interface_clk, "ti,am35xx-interface-clock", 134 of_ti_am35xx_interface_clk_setup); 135 #endif 136 137 #ifdef CONFIG_SOC_OMAP2430 138 static void __init of_ti_omap2430_interface_clk_setup(struct device_node *node) 139 { 140 _of_ti_interface_clk_setup(node, &clkhwops_omap2430_i2chs_wait); 141 } 142 CLK_OF_DECLARE(ti_omap2430_interface_clk, "ti,omap2430-interface-clock", 143 of_ti_omap2430_interface_clk_setup); 144 #endif 145