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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/hwmon/pmbus/bpa-rs600.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/hwmon/pmbus/bpa-rs600.c')
-rw-r--r--drivers/hwmon/pmbus/bpa-rs600.c208
1 files changed, 208 insertions, 0 deletions
diff --git a/drivers/hwmon/pmbus/bpa-rs600.c b/drivers/hwmon/pmbus/bpa-rs600.c
new file mode 100644
index 0000000000..0dce26c355
--- /dev/null
+++ b/drivers/hwmon/pmbus/bpa-rs600.c
@@ -0,0 +1,208 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Hardware monitoring driver for BluTek BPA-RS600 Power Supplies
+ *
+ * Copyright 2021 Allied Telesis Labs
+ */
+
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pmbus.h>
+#include "pmbus.h"
+
+enum chips { bpa_rs600, bpd_rs600 };
+
+static int bpa_rs600_read_byte_data(struct i2c_client *client, int page, int reg)
+{
+ int ret;
+
+ if (page > 0)
+ return -ENXIO;
+
+ switch (reg) {
+ case PMBUS_FAN_CONFIG_12:
+ /*
+ * Two fans are reported in PMBUS_FAN_CONFIG_12 but there is
+ * only one fan in the module. Mask out the FAN2 bits.
+ */
+ ret = pmbus_read_byte_data(client, 0, PMBUS_FAN_CONFIG_12);
+ if (ret >= 0)
+ ret &= ~(PB_FAN_2_INSTALLED | PB_FAN_2_PULSE_MASK);
+ break;
+ default:
+ ret = -ENODATA;
+ break;
+ }
+
+ return ret;
+}
+
+/*
+ * The BPA-RS600 violates the PMBus spec. Specifically it treats the
+ * mantissa as unsigned. Deal with this here to allow the PMBus core
+ * to work with correctly encoded data.
+ */
+static int bpa_rs600_read_vin(struct i2c_client *client)
+{
+ int ret, exponent, mantissa;
+
+ ret = pmbus_read_word_data(client, 0, 0xff, PMBUS_READ_VIN);
+ if (ret < 0)
+ return ret;
+
+ if (ret & BIT(10)) {
+ exponent = ret >> 11;
+ mantissa = ret & 0x7ff;
+
+ exponent++;
+ mantissa >>= 1;
+
+ ret = (exponent << 11) | mantissa;
+ }
+
+ return ret;
+}
+
+/*
+ * Firmware V5.70 incorrectly reports 1640W for MFR_PIN_MAX.
+ * Deal with this by returning a sensible value.
+ */
+static int bpa_rs600_read_pin_max(struct i2c_client *client)
+{
+ int ret;
+
+ ret = pmbus_read_word_data(client, 0, 0xff, PMBUS_MFR_PIN_MAX);
+ if (ret < 0)
+ return ret;
+
+ /* Detect invalid 1640W (linear encoding) */
+ if (ret == 0x0b34)
+ /* Report 700W (linear encoding) */
+ return 0x095e;
+
+ return ret;
+}
+
+static int bpa_rs600_read_word_data(struct i2c_client *client, int page, int phase, int reg)
+{
+ int ret;
+
+ if (page > 0)
+ return -ENXIO;
+
+ switch (reg) {
+ case PMBUS_VIN_UV_WARN_LIMIT:
+ case PMBUS_VIN_OV_WARN_LIMIT:
+ case PMBUS_VOUT_UV_WARN_LIMIT:
+ case PMBUS_VOUT_OV_WARN_LIMIT:
+ case PMBUS_IIN_OC_WARN_LIMIT:
+ case PMBUS_IOUT_OC_WARN_LIMIT:
+ case PMBUS_PIN_OP_WARN_LIMIT:
+ case PMBUS_POUT_OP_WARN_LIMIT:
+ case PMBUS_VIN_UV_FAULT_LIMIT:
+ case PMBUS_VIN_OV_FAULT_LIMIT:
+ case PMBUS_VOUT_UV_FAULT_LIMIT:
+ case PMBUS_VOUT_OV_FAULT_LIMIT:
+ /* These commands return data but it is invalid/un-documented */
+ ret = -ENXIO;
+ break;
+ case PMBUS_READ_VIN:
+ ret = bpa_rs600_read_vin(client);
+ break;
+ case PMBUS_MFR_PIN_MAX:
+ ret = bpa_rs600_read_pin_max(client);
+ break;
+ default:
+ if (reg >= PMBUS_VIRT_BASE)
+ ret = -ENXIO;
+ else
+ ret = -ENODATA;
+ break;
+ }
+
+ return ret;
+}
+
+static struct pmbus_driver_info bpa_rs600_info = {
+ .pages = 1,
+ .format[PSC_VOLTAGE_IN] = linear,
+ .format[PSC_VOLTAGE_OUT] = linear,
+ .format[PSC_CURRENT_IN] = linear,
+ .format[PSC_CURRENT_OUT] = linear,
+ .format[PSC_POWER] = linear,
+ .format[PSC_TEMPERATURE] = linear,
+ .format[PSC_FAN] = linear,
+ .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT |
+ PMBUS_HAVE_IIN | PMBUS_HAVE_IOUT |
+ PMBUS_HAVE_PIN | PMBUS_HAVE_POUT |
+ PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 |
+ PMBUS_HAVE_FAN12 |
+ PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_STATUS_IOUT |
+ PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_STATUS_TEMP |
+ PMBUS_HAVE_STATUS_FAN12,
+ .read_byte_data = bpa_rs600_read_byte_data,
+ .read_word_data = bpa_rs600_read_word_data,
+};
+
+static const struct i2c_device_id bpa_rs600_id[] = {
+ { "bpa-rs600", bpa_rs600 },
+ { "bpd-rs600", bpd_rs600 },
+ {},
+};
+MODULE_DEVICE_TABLE(i2c, bpa_rs600_id);
+
+static int bpa_rs600_probe(struct i2c_client *client)
+{
+ struct device *dev = &client->dev;
+ u8 buf[I2C_SMBUS_BLOCK_MAX + 1];
+ int ret;
+ const struct i2c_device_id *mid;
+
+ if (!i2c_check_functionality(client->adapter,
+ I2C_FUNC_SMBUS_READ_BYTE_DATA
+ | I2C_FUNC_SMBUS_READ_WORD_DATA
+ | I2C_FUNC_SMBUS_READ_BLOCK_DATA))
+ return -ENODEV;
+
+ ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, buf);
+ if (ret < 0) {
+ dev_err(dev, "Failed to read Manufacturer Model\n");
+ return ret;
+ }
+
+ for (mid = bpa_rs600_id; mid->name[0]; mid++) {
+ if (!strncasecmp(buf, mid->name, strlen(mid->name)))
+ break;
+ }
+ if (!mid->name[0]) {
+ buf[ret] = '\0';
+ dev_err(dev, "Unsupported Manufacturer Model '%s'\n", buf);
+ return -ENODEV;
+ }
+
+ return pmbus_do_probe(client, &bpa_rs600_info);
+}
+
+static const struct of_device_id __maybe_unused bpa_rs600_of_match[] = {
+ { .compatible = "blutek,bpa-rs600" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, bpa_rs600_of_match);
+
+static struct i2c_driver bpa_rs600_driver = {
+ .driver = {
+ .name = "bpa-rs600",
+ .of_match_table = of_match_ptr(bpa_rs600_of_match),
+ },
+ .probe = bpa_rs600_probe,
+ .id_table = bpa_rs600_id,
+};
+
+module_i2c_driver(bpa_rs600_driver);
+
+MODULE_AUTHOR("Chris Packham");
+MODULE_DESCRIPTION("PMBus driver for BluTek BPA-RS600");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS(PMBUS);