sy8106a.c revision 1.1.2.2
1 1.1.2.2 jdolecek /* $NetBSD: sy8106a.c,v 1.1.2.2 2017/12/03 11:37:02 jdolecek Exp $ */ 2 1.1.2.2 jdolecek 3 1.1.2.2 jdolecek /*- 4 1.1.2.2 jdolecek * Copyright (c) 2017 Jared McNeill <jmcneill (at) invisible.ca> 5 1.1.2.2 jdolecek * All rights reserved. 6 1.1.2.2 jdolecek * 7 1.1.2.2 jdolecek * Redistribution and use in source and binary forms, with or without 8 1.1.2.2 jdolecek * modification, are permitted provided that the following conditions 9 1.1.2.2 jdolecek * are met: 10 1.1.2.2 jdolecek * 1. Redistributions of source code must retain the above copyright 11 1.1.2.2 jdolecek * notice, this list of conditions and the following disclaimer. 12 1.1.2.2 jdolecek * 2. Redistributions in binary form must reproduce the above copyright 13 1.1.2.2 jdolecek * notice, this list of conditions and the following disclaimer in the 14 1.1.2.2 jdolecek * documentation and/or other materials provided with the distribution. 15 1.1.2.2 jdolecek * 16 1.1.2.2 jdolecek * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 1.1.2.2 jdolecek * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 1.1.2.2 jdolecek * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 1.1.2.2 jdolecek * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 1.1.2.2 jdolecek * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 1.1.2.2 jdolecek * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 1.1.2.2 jdolecek * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 1.1.2.2 jdolecek * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 1.1.2.2 jdolecek * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 1.1.2.2 jdolecek * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 1.1.2.2 jdolecek * POSSIBILITY OF SUCH DAMAGE. 27 1.1.2.2 jdolecek */ 28 1.1.2.2 jdolecek 29 1.1.2.2 jdolecek #include <sys/cdefs.h> 30 1.1.2.2 jdolecek __KERNEL_RCSID(0, "$NetBSD: sy8106a.c,v 1.1.2.2 2017/12/03 11:37:02 jdolecek Exp $"); 31 1.1.2.2 jdolecek 32 1.1.2.2 jdolecek #include <sys/param.h> 33 1.1.2.2 jdolecek #include <sys/systm.h> 34 1.1.2.2 jdolecek #include <sys/kernel.h> 35 1.1.2.2 jdolecek #include <sys/device.h> 36 1.1.2.2 jdolecek #include <sys/conf.h> 37 1.1.2.2 jdolecek #include <sys/bus.h> 38 1.1.2.2 jdolecek #include <sys/kmem.h> 39 1.1.2.2 jdolecek 40 1.1.2.2 jdolecek #include <dev/i2c/i2cvar.h> 41 1.1.2.2 jdolecek 42 1.1.2.2 jdolecek #include <dev/fdt/fdtvar.h> 43 1.1.2.2 jdolecek 44 1.1.2.2 jdolecek #define VOUT1_SEL 0x01 45 1.1.2.2 jdolecek #define SEL_GO __BIT(7) 46 1.1.2.2 jdolecek #define SEL_VOLTAGE __BITS(6,0) 47 1.1.2.2 jdolecek #define SEL_VOLTAGE_BASE 680000 /* uV */ 48 1.1.2.2 jdolecek #define SEL_VOLTAGE_STEP 10000 /* uV */ 49 1.1.2.2 jdolecek #define VOUT_COM 0x02 50 1.1.2.2 jdolecek #define COM_DISABLE __BIT(0) 51 1.1.2.2 jdolecek #define SYS_STATUS 0x06 52 1.1.2.2 jdolecek 53 1.1.2.2 jdolecek struct sy8106a_softc { 54 1.1.2.2 jdolecek device_t sc_dev; 55 1.1.2.2 jdolecek i2c_tag_t sc_i2c; 56 1.1.2.2 jdolecek i2c_addr_t sc_addr; 57 1.1.2.2 jdolecek int sc_phandle; 58 1.1.2.2 jdolecek 59 1.1.2.2 jdolecek u_int sc_ramp_delay; 60 1.1.2.2 jdolecek }; 61 1.1.2.2 jdolecek 62 1.1.2.2 jdolecek static const char * compatible[] = { 63 1.1.2.2 jdolecek "silergy,sy8106a", 64 1.1.2.2 jdolecek NULL 65 1.1.2.2 jdolecek }; 66 1.1.2.2 jdolecek 67 1.1.2.2 jdolecek static uint8_t 68 1.1.2.2 jdolecek sy8106a_read(struct sy8106a_softc *sc, uint8_t reg, int flags) 69 1.1.2.2 jdolecek { 70 1.1.2.2 jdolecek uint8_t val = 0; 71 1.1.2.2 jdolecek int error; 72 1.1.2.2 jdolecek 73 1.1.2.2 jdolecek error = iic_exec(sc->sc_i2c, I2C_OP_READ_WITH_STOP, sc->sc_addr, 74 1.1.2.2 jdolecek ®, 1, &val, 1, flags); 75 1.1.2.2 jdolecek if (error != 0) 76 1.1.2.2 jdolecek aprint_error_dev(sc->sc_dev, "error reading reg %#x: %d\n", reg, error); 77 1.1.2.2 jdolecek 78 1.1.2.2 jdolecek return val; 79 1.1.2.2 jdolecek } 80 1.1.2.2 jdolecek 81 1.1.2.2 jdolecek static void 82 1.1.2.2 jdolecek sy8106a_write(struct sy8106a_softc *sc, uint8_t reg, uint8_t val, int flags) 83 1.1.2.2 jdolecek { 84 1.1.2.2 jdolecek uint8_t buf[2]; 85 1.1.2.2 jdolecek int error; 86 1.1.2.2 jdolecek 87 1.1.2.2 jdolecek buf[0] = reg; 88 1.1.2.2 jdolecek buf[1] = val; 89 1.1.2.2 jdolecek 90 1.1.2.2 jdolecek error = iic_exec(sc->sc_i2c, I2C_OP_WRITE_WITH_STOP, sc->sc_addr, 91 1.1.2.2 jdolecek NULL, 0, buf, 2, flags); 92 1.1.2.2 jdolecek if (error != 0) 93 1.1.2.2 jdolecek aprint_error_dev(sc->sc_dev, "error writing reg %#x: %d\n", reg, error); 94 1.1.2.2 jdolecek } 95 1.1.2.2 jdolecek 96 1.1.2.2 jdolecek #define I2C_READ(sc, reg) sy8106a_read((sc), (reg), I2C_F_POLL) 97 1.1.2.2 jdolecek #define I2C_WRITE(sc, reg, val) sy8106a_write((sc), (reg), (val), I2C_F_POLL) 98 1.1.2.2 jdolecek #define I2C_LOCK(sc) iic_acquire_bus((sc)->sc_i2c, I2C_F_POLL) 99 1.1.2.2 jdolecek #define I2C_UNLOCK(sc) iic_release_bus((sc)->sc_i2c, I2C_F_POLL) 100 1.1.2.2 jdolecek 101 1.1.2.2 jdolecek static int 102 1.1.2.2 jdolecek sy8106a_acquire(device_t dev) 103 1.1.2.2 jdolecek { 104 1.1.2.2 jdolecek return 0; 105 1.1.2.2 jdolecek } 106 1.1.2.2 jdolecek 107 1.1.2.2 jdolecek static void 108 1.1.2.2 jdolecek sy8106a_release(device_t dev) 109 1.1.2.2 jdolecek { 110 1.1.2.2 jdolecek } 111 1.1.2.2 jdolecek 112 1.1.2.2 jdolecek static int 113 1.1.2.2 jdolecek sy8106a_enable(device_t dev, bool enable) 114 1.1.2.2 jdolecek { 115 1.1.2.2 jdolecek struct sy8106a_softc * const sc = device_private(dev); 116 1.1.2.2 jdolecek uint8_t val; 117 1.1.2.2 jdolecek 118 1.1.2.2 jdolecek I2C_LOCK(sc); 119 1.1.2.2 jdolecek val = I2C_READ(sc, VOUT_COM); 120 1.1.2.2 jdolecek if (enable) 121 1.1.2.2 jdolecek val &= ~COM_DISABLE; 122 1.1.2.2 jdolecek else 123 1.1.2.2 jdolecek val |= COM_DISABLE; 124 1.1.2.2 jdolecek I2C_WRITE(sc, VOUT_COM, val); 125 1.1.2.2 jdolecek I2C_UNLOCK(sc); 126 1.1.2.2 jdolecek 127 1.1.2.2 jdolecek if (sc->sc_ramp_delay) 128 1.1.2.2 jdolecek delay(sc->sc_ramp_delay); 129 1.1.2.2 jdolecek 130 1.1.2.2 jdolecek return 0; 131 1.1.2.2 jdolecek } 132 1.1.2.2 jdolecek 133 1.1.2.2 jdolecek static int 134 1.1.2.2 jdolecek sy8106a_set_voltage(device_t dev, u_int min_uvol, u_int max_uvol) 135 1.1.2.2 jdolecek { 136 1.1.2.2 jdolecek struct sy8106a_softc * const sc = device_private(dev); 137 1.1.2.2 jdolecek uint8_t val, oval; 138 1.1.2.2 jdolecek u_int cur_uvol; 139 1.1.2.2 jdolecek 140 1.1.2.2 jdolecek I2C_LOCK(sc); 141 1.1.2.2 jdolecek 142 1.1.2.2 jdolecek /* Get current voltage */ 143 1.1.2.2 jdolecek oval = I2C_READ(sc, VOUT1_SEL); 144 1.1.2.2 jdolecek cur_uvol = __SHIFTOUT(oval, SEL_VOLTAGE) * SEL_VOLTAGE_STEP + 145 1.1.2.2 jdolecek SEL_VOLTAGE_BASE; 146 1.1.2.2 jdolecek 147 1.1.2.2 jdolecek /* Set new voltage */ 148 1.1.2.2 jdolecek val = SEL_GO | ((min_uvol - SEL_VOLTAGE_BASE) / SEL_VOLTAGE_STEP); 149 1.1.2.2 jdolecek I2C_WRITE(sc, VOUT1_SEL, val); 150 1.1.2.2 jdolecek 151 1.1.2.2 jdolecek I2C_UNLOCK(sc); 152 1.1.2.2 jdolecek 153 1.1.2.2 jdolecek /* Time to delay is based on the number of voltage steps */ 154 1.1.2.2 jdolecek if (sc->sc_ramp_delay) 155 1.1.2.2 jdolecek delay((abs(cur_uvol - min_uvol) / SEL_VOLTAGE_STEP) * sc->sc_ramp_delay); 156 1.1.2.2 jdolecek 157 1.1.2.2 jdolecek return 0; 158 1.1.2.2 jdolecek } 159 1.1.2.2 jdolecek 160 1.1.2.2 jdolecek static int 161 1.1.2.2 jdolecek sy8106a_get_voltage(device_t dev, u_int *puvol) 162 1.1.2.2 jdolecek { 163 1.1.2.2 jdolecek struct sy8106a_softc * const sc = device_private(dev); 164 1.1.2.2 jdolecek uint8_t val; 165 1.1.2.2 jdolecek 166 1.1.2.2 jdolecek I2C_LOCK(sc); 167 1.1.2.2 jdolecek val = I2C_READ(sc, VOUT1_SEL); 168 1.1.2.2 jdolecek I2C_UNLOCK(sc); 169 1.1.2.2 jdolecek 170 1.1.2.2 jdolecek *puvol = __SHIFTOUT(val, SEL_VOLTAGE) * SEL_VOLTAGE_STEP + 171 1.1.2.2 jdolecek SEL_VOLTAGE_BASE; 172 1.1.2.2 jdolecek 173 1.1.2.2 jdolecek return 0; 174 1.1.2.2 jdolecek } 175 1.1.2.2 jdolecek 176 1.1.2.2 jdolecek static struct fdtbus_regulator_controller_func sy8106a_funcs = { 177 1.1.2.2 jdolecek .acquire = sy8106a_acquire, 178 1.1.2.2 jdolecek .release = sy8106a_release, 179 1.1.2.2 jdolecek .enable = sy8106a_enable, 180 1.1.2.2 jdolecek .set_voltage = sy8106a_set_voltage, 181 1.1.2.2 jdolecek .get_voltage = sy8106a_get_voltage, 182 1.1.2.2 jdolecek }; 183 1.1.2.2 jdolecek 184 1.1.2.2 jdolecek static int 185 1.1.2.2 jdolecek sy8106a_match(device_t parent, cfdata_t match, void *aux) 186 1.1.2.2 jdolecek { 187 1.1.2.2 jdolecek struct i2c_attach_args *ia = aux; 188 1.1.2.2 jdolecek 189 1.1.2.2 jdolecek if (ia->ia_name == NULL) 190 1.1.2.2 jdolecek return 0; 191 1.1.2.2 jdolecek 192 1.1.2.2 jdolecek return iic_compat_match(ia, compatible); 193 1.1.2.2 jdolecek } 194 1.1.2.2 jdolecek 195 1.1.2.2 jdolecek static void 196 1.1.2.2 jdolecek sy8106a_attach(device_t parent, device_t self, void *aux) 197 1.1.2.2 jdolecek { 198 1.1.2.2 jdolecek struct sy8106a_softc * const sc = device_private(self); 199 1.1.2.2 jdolecek struct i2c_attach_args *ia = aux; 200 1.1.2.2 jdolecek 201 1.1.2.2 jdolecek sc->sc_dev = self; 202 1.1.2.2 jdolecek sc->sc_i2c = ia->ia_tag; 203 1.1.2.2 jdolecek sc->sc_addr = ia->ia_addr; 204 1.1.2.2 jdolecek sc->sc_phandle = ia->ia_cookie; 205 1.1.2.2 jdolecek 206 1.1.2.2 jdolecek aprint_naive("\n"); 207 1.1.2.2 jdolecek aprint_normal(": Silergy SY8106A regulator\n"); 208 1.1.2.2 jdolecek 209 1.1.2.2 jdolecek of_getprop_uint32(sc->sc_phandle, "regulator-ramp-delay", 210 1.1.2.2 jdolecek &sc->sc_ramp_delay); 211 1.1.2.2 jdolecek 212 1.1.2.2 jdolecek fdtbus_register_regulator_controller(self, sc->sc_phandle, 213 1.1.2.2 jdolecek &sy8106a_funcs); 214 1.1.2.2 jdolecek } 215 1.1.2.2 jdolecek 216 1.1.2.2 jdolecek CFATTACH_DECL_NEW(sy8106a, sizeof(struct sy8106a_softc), 217 1.1.2.2 jdolecek sy8106a_match, sy8106a_attach, NULL, NULL); 218
Indexes created Sat Oct 25 16:10:12 GMT 2025