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-rw-r--r--drivers/hwmon/pmbus/pli1209bc.c146
1 files changed, 146 insertions, 0 deletions
diff --git a/drivers/hwmon/pmbus/pli1209bc.c b/drivers/hwmon/pmbus/pli1209bc.c
new file mode 100644
index 000000000..05b4ee35b
--- /dev/null
+++ b/drivers/hwmon/pmbus/pli1209bc.c
@@ -0,0 +1,146 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Hardware monitoring driver for Vicor PLI1209BC Digital Supervisor
+ *
+ * Copyright (c) 2022 9elements GmbH
+ */
+
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/pmbus.h>
+#include <linux/regulator/driver.h>
+#include "pmbus.h"
+
+/*
+ * The capability command is only supported at page 0. Probing the device while
+ * the page register is set to 1 will falsely enable PEC support. Disable
+ * capability probing accordingly, since the PLI1209BC does not have any
+ * additional capabilities.
+ */
+static struct pmbus_platform_data pli1209bc_plat_data = {
+ .flags = PMBUS_NO_CAPABILITY,
+};
+
+static int pli1209bc_read_word_data(struct i2c_client *client, int page,
+ int phase, int reg)
+{
+ int data;
+
+ switch (reg) {
+ /* PMBUS_READ_POUT uses a direct format with R=0 */
+ case PMBUS_READ_POUT:
+ data = pmbus_read_word_data(client, page, phase, reg);
+ if (data < 0)
+ return data;
+ data = sign_extend32(data, 15) * 10;
+ return clamp_val(data, -32768, 32767) & 0xffff;
+ /*
+ * PMBUS_READ_VOUT and PMBUS_READ_TEMPERATURE_1 return invalid data
+ * when the BCM is turned off. Since it is not possible to return
+ * ENODATA error, return zero instead.
+ */
+ case PMBUS_READ_VOUT:
+ case PMBUS_READ_TEMPERATURE_1:
+ data = pmbus_read_word_data(client, page, phase,
+ PMBUS_STATUS_WORD);
+ if (data < 0)
+ return data;
+ if (data & PB_STATUS_POWER_GOOD_N)
+ return 0;
+ return pmbus_read_word_data(client, page, phase, reg);
+ default:
+ return -ENODATA;
+ }
+}
+
+#if IS_ENABLED(CONFIG_SENSORS_PLI1209BC_REGULATOR)
+static const struct regulator_desc pli1209bc_reg_desc = {
+ .name = "vout2",
+ .id = 1,
+ .of_match = of_match_ptr("vout2"),
+ .regulators_node = of_match_ptr("regulators"),
+ .ops = &pmbus_regulator_ops,
+ .type = REGULATOR_VOLTAGE,
+ .owner = THIS_MODULE,
+};
+#endif
+
+static struct pmbus_driver_info pli1209bc_info = {
+ .pages = 2,
+ .format[PSC_VOLTAGE_IN] = direct,
+ .format[PSC_VOLTAGE_OUT] = direct,
+ .format[PSC_CURRENT_IN] = direct,
+ .format[PSC_CURRENT_OUT] = direct,
+ .format[PSC_POWER] = direct,
+ .format[PSC_TEMPERATURE] = direct,
+ .m[PSC_VOLTAGE_IN] = 1,
+ .b[PSC_VOLTAGE_IN] = 0,
+ .R[PSC_VOLTAGE_IN] = 1,
+ .m[PSC_VOLTAGE_OUT] = 1,
+ .b[PSC_VOLTAGE_OUT] = 0,
+ .R[PSC_VOLTAGE_OUT] = 1,
+ .m[PSC_CURRENT_IN] = 1,
+ .b[PSC_CURRENT_IN] = 0,
+ .R[PSC_CURRENT_IN] = 3,
+ .m[PSC_CURRENT_OUT] = 1,
+ .b[PSC_CURRENT_OUT] = 0,
+ .R[PSC_CURRENT_OUT] = 2,
+ .m[PSC_POWER] = 1,
+ .b[PSC_POWER] = 0,
+ .R[PSC_POWER] = 1,
+ .m[PSC_TEMPERATURE] = 1,
+ .b[PSC_TEMPERATURE] = 0,
+ .R[PSC_TEMPERATURE] = 0,
+ /*
+ * Page 0 sums up all attributes except voltage readings.
+ * The pli1209 digital supervisor only contains a single BCM, making
+ * page 0 redundant.
+ */
+ .func[1] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT
+ | PMBUS_HAVE_IIN | PMBUS_HAVE_IOUT
+ | PMBUS_HAVE_PIN | PMBUS_HAVE_POUT
+ | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP
+ | PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_STATUS_INPUT,
+ .read_word_data = pli1209bc_read_word_data,
+#if IS_ENABLED(CONFIG_SENSORS_PLI1209BC_REGULATOR)
+ .num_regulators = 1,
+ .reg_desc = &pli1209bc_reg_desc,
+#endif
+};
+
+static int pli1209bc_probe(struct i2c_client *client)
+{
+ client->dev.platform_data = &pli1209bc_plat_data;
+ return pmbus_do_probe(client, &pli1209bc_info);
+}
+
+static const struct i2c_device_id pli1209bc_id[] = {
+ {"pli1209bc", 0},
+ {}
+};
+
+MODULE_DEVICE_TABLE(i2c, pli1209bc_id);
+
+#ifdef CONFIG_OF
+static const struct of_device_id pli1209bc_of_match[] = {
+ { .compatible = "vicor,pli1209bc" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, pli1209bc_of_match);
+#endif
+
+static struct i2c_driver pli1209bc_driver = {
+ .driver = {
+ .name = "pli1209bc",
+ .of_match_table = of_match_ptr(pli1209bc_of_match),
+ },
+ .probe_new = pli1209bc_probe,
+ .id_table = pli1209bc_id,
+};
+
+module_i2c_driver(pli1209bc_driver);
+
+MODULE_AUTHOR("Marcello Sylvester Bauer <sylv@sylv.io>");
+MODULE_DESCRIPTION("PMBus driver for Vicor PLI1209BC");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS(PMBUS);