1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2018-2021 Emmanuel Vadot <manu@FreeBSD.org> 5 * Copyright (c) 2021 Bjoern A. Zeeb <bz@FreeBSD.org> 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/param.h> 33 #include <sys/bus.h> 34 #include <sys/systm.h> 35 #include <sys/clock.h> 36 37 #include <dev/ofw/ofw_bus.h> 38 #include <dev/ofw/ofw_bus_subr.h> 39 40 #include <dev/extres/clk/clk.h> 41 42 #include <dev/iicbus/pmic/rockchip/rk8xx.h> 43 44 /* Clock class and method */ 45 struct rk8xx_clk_sc { 46 device_t base_dev; 47 }; 48 49 #define CLK32OUT_REG 0x20 50 #define CLK32OUT_CLKOUT2_EN 1 51 52 static int 53 rk8xx_clk_set_gate_1(struct clknode *clk, bool enable) 54 { 55 struct rk8xx_clk_sc *sc; 56 uint8_t val; 57 58 sc = clknode_get_softc(clk); 59 60 rk8xx_read(sc->base_dev, CLK32OUT_REG, &val, sizeof(val)); 61 if (enable) 62 val |= CLK32OUT_CLKOUT2_EN; 63 else 64 val &= ~CLK32OUT_CLKOUT2_EN; 65 rk8xx_write(sc->base_dev, CLK32OUT_REG, &val, 1); 66 67 return (0); 68 } 69 70 static int 71 rk8xx_clk_recalc(struct clknode *clk, uint64_t *freq) 72 { 73 74 *freq = 32768; 75 return (0); 76 } 77 78 static clknode_method_t rk8xx_clk_clknode_methods_0[] = { 79 CLKNODEMETHOD(clknode_recalc_freq, rk8xx_clk_recalc), 80 CLKNODEMETHOD_END 81 }; 82 83 DEFINE_CLASS_1(rk8xx_clk_clknode_0, rk8xx_clk_clknode_class_0, 84 rk8xx_clk_clknode_methods_0, sizeof(struct rk8xx_clk_sc), 85 clknode_class); 86 87 static clknode_method_t rk8xx_clk_clknode_methods_1[] = { 88 CLKNODEMETHOD(clknode_set_gate, rk8xx_clk_set_gate_1), 89 CLKNODEMETHOD_END 90 }; 91 92 DEFINE_CLASS_1(rk8xx_clk_clknode_1, rk8xx_clk_clknode_class_1, 93 rk8xx_clk_clknode_methods_1, sizeof(struct rk8xx_clk_sc), 94 rk8xx_clk_clknode_class_0); 95 96 int 97 rk8xx_attach_clocks(struct rk8xx_softc *sc) 98 { 99 struct clkdom *clkdom; 100 struct clknode_init_def clkidef; 101 struct clknode *clk; 102 struct rk8xx_clk_sc *clksc; 103 const char **clknames; 104 phandle_t node; 105 int nclks, rv; 106 107 node = ofw_bus_get_node(sc->dev); 108 109 /* clock-output-names are optional. Could use them for clkidef.name. */ 110 nclks = ofw_bus_string_list_to_array(node, "clock-output-names", 111 &clknames); 112 113 clkdom = clkdom_create(sc->dev); 114 115 memset(&clkidef, 0, sizeof(clkidef)); 116 clkidef.id = 0; 117 clkidef.name = (nclks = 2) ? clknames[0] : "clk32kout1"; 118 clk = clknode_create(clkdom, &rk8xx_clk_clknode_class_0, &clkidef); 119 if (clk == NULL) { 120 device_printf(sc->dev, "Cannot create '%s'.\n", clkidef.name); 121 return (ENXIO); 122 } 123 clksc = clknode_get_softc(clk); 124 clksc->base_dev = sc->dev; 125 clknode_register(clkdom, clk); 126 127 memset(&clkidef, 0, sizeof(clkidef)); 128 clkidef.id = 1; 129 clkidef.name = (nclks = 2) ? clknames[1] : "clk32kout2"; 130 clk = clknode_create(clkdom, &rk8xx_clk_clknode_class_1, &clkidef); 131 if (clk == NULL) { 132 device_printf(sc->dev, "Cannot create '%s'.\n", clkidef.name); 133 return (ENXIO); 134 } 135 clksc = clknode_get_softc(clk); 136 clksc->base_dev = sc->dev; 137 clknode_register(clkdom, clk); 138 139 rv = clkdom_finit(clkdom); 140 if (rv != 0) { 141 device_printf(sc->dev, "Cannot finalize clkdom initialization: " 142 "%d\n", rv); 143 return (ENXIO); 144 } 145 146 if (bootverbose) 147 clkdom_dump(clkdom); 148 149 return (0); 150 } 151