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/param.h> 30 #include <sys/bus.h> 31 #include <sys/systm.h> 32 #include <sys/clock.h> 33 34 #include <dev/ofw/ofw_bus.h> 35 #include <dev/ofw/ofw_bus_subr.h> 36 37 #include <dev/clk/clk.h> 38 39 #include <dev/iicbus/pmic/rockchip/rk8xx.h> 40 41 /* Clock class and method */ 42 struct rk8xx_clk_sc { 43 device_t base_dev; 44 }; 45 46 #define CLK32OUT_REG 0x20 47 #define CLK32OUT_CLKOUT2_EN 1 48 49 static int 50 rk8xx_clk_set_gate_1(struct clknode *clk, bool enable) 51 { 52 struct rk8xx_clk_sc *sc; 53 uint8_t val; 54 55 sc = clknode_get_softc(clk); 56 57 rk8xx_read(sc->base_dev, CLK32OUT_REG, &val, sizeof(val)); 58 if (enable) 59 val |= CLK32OUT_CLKOUT2_EN; 60 else 61 val &= ~CLK32OUT_CLKOUT2_EN; 62 rk8xx_write(sc->base_dev, CLK32OUT_REG, &val, 1); 63 64 return (0); 65 } 66 67 static int 68 rk8xx_clk_recalc(struct clknode *clk, uint64_t *freq) 69 { 70 71 *freq = 32768; 72 return (0); 73 } 74 75 static clknode_method_t rk8xx_clk_clknode_methods_0[] = { 76 CLKNODEMETHOD(clknode_recalc_freq, rk8xx_clk_recalc), 77 CLKNODEMETHOD_END 78 }; 79 80 DEFINE_CLASS_1(rk8xx_clk_clknode_0, rk8xx_clk_clknode_class_0, 81 rk8xx_clk_clknode_methods_0, sizeof(struct rk8xx_clk_sc), 82 clknode_class); 83 84 static clknode_method_t rk8xx_clk_clknode_methods_1[] = { 85 CLKNODEMETHOD(clknode_set_gate, rk8xx_clk_set_gate_1), 86 CLKNODEMETHOD_END 87 }; 88 89 DEFINE_CLASS_1(rk8xx_clk_clknode_1, rk8xx_clk_clknode_class_1, 90 rk8xx_clk_clknode_methods_1, sizeof(struct rk8xx_clk_sc), 91 rk8xx_clk_clknode_class_0); 92 93 int 94 rk8xx_attach_clocks(struct rk8xx_softc *sc) 95 { 96 struct clkdom *clkdom; 97 struct clknode_init_def clkidef; 98 struct clknode *clk; 99 struct rk8xx_clk_sc *clksc; 100 const char **clknames; 101 phandle_t node; 102 int nclks, rv; 103 104 node = ofw_bus_get_node(sc->dev); 105 106 /* clock-output-names are optional. Could use them for clkidef.name. */ 107 nclks = ofw_bus_string_list_to_array(node, "clock-output-names", 108 &clknames); 109 110 clkdom = clkdom_create(sc->dev); 111 112 memset(&clkidef, 0, sizeof(clkidef)); 113 clkidef.id = 0; 114 clkidef.name = (nclks == 2) ? clknames[0] : "clk32kout1"; 115 clk = clknode_create(clkdom, &rk8xx_clk_clknode_class_0, &clkidef); 116 if (clk == NULL) { 117 device_printf(sc->dev, "Cannot create '%s'.\n", clkidef.name); 118 return (ENXIO); 119 } 120 clksc = clknode_get_softc(clk); 121 clksc->base_dev = sc->dev; 122 clknode_register(clkdom, clk); 123 124 memset(&clkidef, 0, sizeof(clkidef)); 125 clkidef.id = 1; 126 clkidef.name = (nclks == 2) ? clknames[1] : "clk32kout2"; 127 clk = clknode_create(clkdom, &rk8xx_clk_clknode_class_1, &clkidef); 128 if (clk == NULL) { 129 device_printf(sc->dev, "Cannot create '%s'.\n", clkidef.name); 130 return (ENXIO); 131 } 132 clksc = clknode_get_softc(clk); 133 clksc->base_dev = sc->dev; 134 clknode_register(clkdom, clk); 135 136 rv = clkdom_finit(clkdom); 137 if (rv != 0) { 138 device_printf(sc->dev, "Cannot finalize clkdom initialization: " 139 "%d\n", rv); 140 return (ENXIO); 141 } 142 143 if (bootverbose) 144 clkdom_dump(clkdom); 145 146 return (0); 147 } 148