^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Lochnagar hardware monitoring features
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (c) 2016-2019 Cirrus Logic, Inc. and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Cirrus Logic International Semiconductor Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Author: Lucas Tanure <tanureal@opensource.cirrus.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/hwmon.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/hwmon-sysfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/math64.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/mfd/lochnagar.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/mfd/lochnagar2_regs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/of_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/regmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #define LN2_MAX_NSAMPLE 1023
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define LN2_SAMPLE_US 1670
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define LN2_CURR_UNITS 1000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define LN2_VOLT_UNITS 1000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define LN2_TEMP_UNITS 1000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #define LN2_PWR_UNITS 1000000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) static const char * const lochnagar_chan_names[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) "DBVDD1",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) "1V8 DSP",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) "1V8 CDC",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) "VDDCORE DSP",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) "AVDD 1V8",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) "SYSVDD",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) "VDDCORE CDC",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) "MICVDD",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) struct lochnagar_hwmon {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) struct regmap *regmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) long power_nsamples[ARRAY_SIZE(lochnagar_chan_names)];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) /* Lock to ensure only a single sensor is read at a time */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) struct mutex sensor_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) enum lochnagar_measure_mode {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) LN2_CURR = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) LN2_VOLT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) LN2_TEMP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) * float_to_long - Convert ieee754 reading from hardware to an integer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) * @data: Value read from the hardware
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) * @precision: Units to multiply up to eg. 1000 = milli, 1000000 = micro
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) * Return: Converted integer reading
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) * Depending on the measurement type the hardware returns an ieee754
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) * floating point value in either volts, amps or celsius. This function
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) * will convert that into an integer in a smaller unit such as micro-amps
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) * or milli-celsius. The hardware does not return NaN, so consideration of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) * that is not required.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) static long float_to_long(u32 data, u32 precision)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) u64 man = data & 0x007FFFFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) int exp = ((data & 0x7F800000) >> 23) - 127 - 23;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) bool negative = data & 0x80000000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) long result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) man = (man + (1 << 23)) * precision;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) if (fls64(man) + exp > (int)sizeof(long) * 8 - 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) result = LONG_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) else if (exp < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) result = (man + (1ull << (-exp - 1))) >> -exp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) result = man << exp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) return negative ? -result : result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) static int do_measurement(struct regmap *regmap, int chan,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) enum lochnagar_measure_mode mode, int nsamples)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) unsigned int val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) chan = 1 << (chan + LOCHNAGAR2_IMON_MEASURED_CHANNELS_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) ret = regmap_write(regmap, LOCHNAGAR2_IMON_CTRL1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) LOCHNAGAR2_IMON_ENA_MASK | chan | mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) ret = regmap_write(regmap, LOCHNAGAR2_IMON_CTRL2, nsamples);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) ret = regmap_write(regmap, LOCHNAGAR2_IMON_CTRL3,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) LOCHNAGAR2_IMON_CONFIGURE_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) ret = regmap_read_poll_timeout(regmap, LOCHNAGAR2_IMON_CTRL3, val,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) val & LOCHNAGAR2_IMON_DONE_MASK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 1000, 10000);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) ret = regmap_write(regmap, LOCHNAGAR2_IMON_CTRL3,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) LOCHNAGAR2_IMON_MEASURE_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) * Actual measurement time is ~1.67mS per sample, approximate this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) * with a 1.5mS per sample msleep and then poll for success up to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) * ~0.17mS * 1023 (LN2_MAX_NSAMPLES). Normally for smaller values
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) * of nsamples the poll will complete on the first loop due to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) * other latency in the system.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) msleep((nsamples * 3) / 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) ret = regmap_read_poll_timeout(regmap, LOCHNAGAR2_IMON_CTRL3, val,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) val & LOCHNAGAR2_IMON_DONE_MASK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 5000, 200000);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) return regmap_write(regmap, LOCHNAGAR2_IMON_CTRL3, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) static int request_data(struct regmap *regmap, int chan, u32 *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) unsigned int val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) ret = regmap_write(regmap, LOCHNAGAR2_IMON_CTRL4,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) LOCHNAGAR2_IMON_DATA_REQ_MASK |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) chan << LOCHNAGAR2_IMON_CH_SEL_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) ret = regmap_read_poll_timeout(regmap, LOCHNAGAR2_IMON_CTRL4, val,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) val & LOCHNAGAR2_IMON_DATA_RDY_MASK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 1000, 10000);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) ret = regmap_read(regmap, LOCHNAGAR2_IMON_DATA1, &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) *data = val << 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) ret = regmap_read(regmap, LOCHNAGAR2_IMON_DATA2, &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) *data |= val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) return regmap_write(regmap, LOCHNAGAR2_IMON_CTRL4, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) static int read_sensor(struct device *dev, int chan,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) enum lochnagar_measure_mode mode, int nsamples,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) unsigned int precision, long *val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) struct lochnagar_hwmon *priv = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) struct regmap *regmap = priv->regmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) u32 data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) mutex_lock(&priv->sensor_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) ret = do_measurement(regmap, chan, mode, nsamples);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) dev_err(dev, "Failed to perform measurement: %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) ret = request_data(regmap, chan, &data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) dev_err(dev, "Failed to read measurement: %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) *val = float_to_long(data, precision);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) error:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) mutex_unlock(&priv->sensor_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) static int read_power(struct device *dev, int chan, long *val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) struct lochnagar_hwmon *priv = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) int nsamples = priv->power_nsamples[chan];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) u64 power;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) if (!strcmp("SYSVDD", lochnagar_chan_names[chan])) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) power = 5 * LN2_PWR_UNITS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) ret = read_sensor(dev, chan, LN2_VOLT, 1, LN2_PWR_UNITS, val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) power = abs(*val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) ret = read_sensor(dev, chan, LN2_CURR, nsamples, LN2_PWR_UNITS, val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) power *= abs(*val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) power = DIV_ROUND_CLOSEST_ULL(power, LN2_PWR_UNITS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) if (power > LONG_MAX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) *val = LONG_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) *val = power;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) static umode_t lochnagar_is_visible(const void *drvdata,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) enum hwmon_sensor_types type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) u32 attr, int chan)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) switch (type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) case hwmon_in:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) if (!strcmp("SYSVDD", lochnagar_chan_names[chan]))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) case hwmon_power:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) if (attr == hwmon_power_average_interval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) return 0644;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) return 0444;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) static int lochnagar_read(struct device *dev, enum hwmon_sensor_types type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) u32 attr, int chan, long *val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) struct lochnagar_hwmon *priv = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) int interval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) switch (type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) case hwmon_in:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) return read_sensor(dev, chan, LN2_VOLT, 1, LN2_VOLT_UNITS, val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) case hwmon_curr:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) return read_sensor(dev, chan, LN2_CURR, 1, LN2_CURR_UNITS, val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) case hwmon_temp:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) return read_sensor(dev, chan, LN2_TEMP, 1, LN2_TEMP_UNITS, val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) case hwmon_power:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) switch (attr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) case hwmon_power_average:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) return read_power(dev, chan, val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) case hwmon_power_average_interval:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) interval = priv->power_nsamples[chan] * LN2_SAMPLE_US;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) *val = DIV_ROUND_CLOSEST(interval, 1000);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) static int lochnagar_read_string(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) enum hwmon_sensor_types type, u32 attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) int chan, const char **str)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) switch (type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) case hwmon_in:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) case hwmon_curr:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) case hwmon_power:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) *str = lochnagar_chan_names[chan];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) static int lochnagar_write(struct device *dev, enum hwmon_sensor_types type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) u32 attr, int chan, long val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) struct lochnagar_hwmon *priv = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) if (type != hwmon_power || attr != hwmon_power_average_interval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) val = clamp_t(long, val, 1, (LN2_MAX_NSAMPLE * LN2_SAMPLE_US) / 1000);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) val = DIV_ROUND_CLOSEST(val * 1000, LN2_SAMPLE_US);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) priv->power_nsamples[chan] = val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) static const struct hwmon_ops lochnagar_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) .is_visible = lochnagar_is_visible,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) .read = lochnagar_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) .read_string = lochnagar_read_string,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) .write = lochnagar_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) static const struct hwmon_channel_info *lochnagar_info[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) HWMON_CHANNEL_INFO(in, HWMON_I_INPUT | HWMON_I_LABEL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) HWMON_I_INPUT | HWMON_I_LABEL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) HWMON_I_INPUT | HWMON_I_LABEL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) HWMON_I_INPUT | HWMON_I_LABEL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) HWMON_I_INPUT | HWMON_I_LABEL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) HWMON_I_INPUT | HWMON_I_LABEL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) HWMON_I_INPUT | HWMON_I_LABEL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) HWMON_I_INPUT | HWMON_I_LABEL),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) HWMON_CHANNEL_INFO(curr, HWMON_C_INPUT | HWMON_C_LABEL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) HWMON_C_INPUT | HWMON_C_LABEL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) HWMON_C_INPUT | HWMON_C_LABEL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) HWMON_C_INPUT | HWMON_C_LABEL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) HWMON_C_INPUT | HWMON_C_LABEL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) HWMON_C_INPUT | HWMON_C_LABEL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) HWMON_C_INPUT | HWMON_C_LABEL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) HWMON_C_INPUT | HWMON_C_LABEL),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) HWMON_CHANNEL_INFO(power, HWMON_P_AVERAGE | HWMON_P_AVERAGE_INTERVAL |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) HWMON_P_LABEL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) HWMON_P_AVERAGE | HWMON_P_AVERAGE_INTERVAL |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) HWMON_P_LABEL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) HWMON_P_AVERAGE | HWMON_P_AVERAGE_INTERVAL |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) HWMON_P_LABEL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) HWMON_P_AVERAGE | HWMON_P_AVERAGE_INTERVAL |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) HWMON_P_LABEL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) HWMON_P_AVERAGE | HWMON_P_AVERAGE_INTERVAL |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) HWMON_P_LABEL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) HWMON_P_AVERAGE | HWMON_P_AVERAGE_INTERVAL |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) HWMON_P_LABEL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) HWMON_P_AVERAGE | HWMON_P_AVERAGE_INTERVAL |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) HWMON_P_LABEL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) HWMON_P_AVERAGE | HWMON_P_AVERAGE_INTERVAL |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) HWMON_P_LABEL),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) static const struct hwmon_chip_info lochnagar_chip_info = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) .ops = &lochnagar_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) .info = lochnagar_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) static const struct of_device_id lochnagar_of_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) { .compatible = "cirrus,lochnagar2-hwmon" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) MODULE_DEVICE_TABLE(of, lochnagar_of_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) static int lochnagar_hwmon_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) struct device *dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) struct device *hwmon_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) struct lochnagar_hwmon *priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) if (!priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) mutex_init(&priv->sensor_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) priv->regmap = dev_get_regmap(dev->parent, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) if (!priv->regmap) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) dev_err(dev, "No register map found\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) for (i = 0; i < ARRAY_SIZE(priv->power_nsamples); i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) priv->power_nsamples[i] = 96;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) hwmon_dev = devm_hwmon_device_register_with_info(dev, "Lochnagar", priv,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) &lochnagar_chip_info,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) return PTR_ERR_OR_ZERO(hwmon_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) static struct platform_driver lochnagar_hwmon_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) .name = "lochnagar-hwmon",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) .of_match_table = lochnagar_of_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) .probe = lochnagar_hwmon_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) module_platform_driver(lochnagar_hwmon_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) MODULE_AUTHOR("Lucas Tanure <tanureal@opensource.cirrus.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) MODULE_DESCRIPTION("Lochnagar hardware monitoring features");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags