[devices]: Add HLX a dps200 psu driver (#2871)

platform/broadcom/sonic-platform-modules-cel/debian/platform-modules-haliburton.init

@@ -17,6 +17,7 @@ start)
 
         modprobe smc
         modprobe hlx_gpio_ich
+        modprobe dps200
 
         found=0
         for devnum in 0 1; do
@@ -51,6 +52,9 @@ start)
         echo max6697 0x1a > /sys/bus/i2c/devices/i2c-3/new_device
         echo max6697 0x1a > /sys/bus/i2c/devices/i2c-11/new_device
 
+        # Attach PSUs
+        echo dps200 0x5a > /sys/bus/i2c/devices/i2c-12/new_device
+        echo dps200 0x5b > /sys/bus/i2c/devices/i2c-13/new_device
 
         # Attach fans
         echo emc2305 0x4d > /sys/bus/i2c/devices/i2c-23/new_device

platform/broadcom/sonic-platform-modules-cel/haliburton/modules/Makefile

@@ -1 +1 @@
-obj-m := mc24lc64t.o emc2305.o smc.o hlx_gpio_ich.o
+obj-m := mc24lc64t.o emc2305.o smc.o hlx_gpio_ich.o dps200.o

platform/broadcom/sonic-platform-modules-cel/haliburton/modules/dps200.c

@@ -0,0 +1,128 @@
+/*
+ * Hardware monitoring driver for Delta DPS200
+ *
+ * (C) Copyright 2019, Celestica Inc.
+ * Author: Pradchaya Phucharoen <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/mutex.h>
+#include <linux/i2c.h>
+#include <linux/i2c/pmbus.h>
+#include "pmbus.h"
+
+
+static int dps200_read_word_data(struct i2c_client *client, int page, int reg)
+{
+
+    if (reg >= PMBUS_VIRT_BASE ||
+        reg == PMBUS_VOUT_OV_FAULT_LIMIT ||
+        reg == PMBUS_VOUT_OV_WARN_LIMIT ||
+        reg == PMBUS_VOUT_UV_WARN_LIMIT ||
+        reg == PMBUS_VOUT_UV_FAULT_LIMIT ||
+        reg == PMBUS_IOUT_OC_LV_FAULT_LIMIT ||
+        reg == PMBUS_IOUT_UC_FAULT_LIMIT ||
+        reg == PMBUS_UT_WARN_LIMIT ||
+        reg == PMBUS_UT_FAULT_LIMIT ||
+        reg == PMBUS_VIN_OV_FAULT_LIMIT ||
+        reg == PMBUS_VIN_OV_WARN_LIMIT ||
+        reg == PMBUS_IIN_OC_FAULT_LIMIT ||
+        reg == PMBUS_POUT_MAX)
+        return -ENXIO;
+
+    /* 
+     * WARNING: The following feild have coinstant driver value.
+     * If the register are 
+     * PMBUS_IOUT_OC_WARN_LIMIT or PMBUS_IOUT_OC_FAULT_LIMIT convert 
+     * the constant value from linear to direct fomat.
+     */
+    if (reg == PMBUS_IOUT_OC_WARN_LIMIT)
+        return 0xb4;
+    else if (reg == PMBUS_IOUT_OC_FAULT_LIMIT)
+        return 0xc8;
+    else
+        return pmbus_read_word_data(client, page, reg);
+}
+
+/*
+ * Form DPS-200 datasheet the supported sensors format defined as:
+ * VOUT: direct mode with one decimal place.
+ * 
+ * Other sensors:
+ * IOUT: direct mode with one decimal place.
+ * IOUT Limits: linear mode, which difference from IOUT.
+ * VIN, IIN, POWER, TEMP, & FAN: linear mode.
+ */
+static struct pmbus_driver_info dps200_info = {
+    .pages = 1,
+    .func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
+                 | PMBUS_HAVE_IIN | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT
+                 | PMBUS_HAVE_PIN | PMBUS_HAVE_POUT
+                 | PMBUS_HAVE_FAN12 | PMBUS_HAVE_STATUS_FAN12
+                 | PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 | PMBUS_HAVE_TEMP3 | PMBUS_HAVE_STATUS_TEMP
+                 | PMBUS_HAVE_STATUS_INPUT,
+    .format = {
+        [PSC_VOLTAGE_OUT] = direct,
+        [PSC_CURRENT_OUT] = direct,
+    },
+    .m = {
+        [PSC_VOLTAGE_OUT] = 10,
+        [PSC_CURRENT_OUT] = 10,
+    },
+    .b = {
+        [PSC_VOLTAGE_OUT] = 0,
+        [PSC_CURRENT_OUT] = 0,
+    },
+    .R = {
+        [PSC_VOLTAGE_OUT] = 0,
+        [PSC_CURRENT_OUT] = 0,
+    },
+    .read_word_data = &dps200_read_word_data,
+};
+
+static int pmbus_probe(struct i2c_client *client,
+               const struct i2c_device_id *id)
+{
+    return pmbus_do_probe(client, id, &dps200_info);
+}
+/* user driver datat to pass the grpup */
+static const struct i2c_device_id dps200_id[] = {
+    {"dps200", 0},
+    {}
+};
+
+MODULE_DEVICE_TABLE(i2c, dps200_id);
+
+/* This is the driver that will be inserted */
+static struct i2c_driver dps200_driver = {
+    .driver = {
+           .name = "dps200",
+           },
+    .probe = pmbus_probe,
+    .remove = pmbus_do_remove,
+    .id_table = dps200_id,
+};
+
+module_i2c_driver(dps200_driver);
+
+MODULE_AUTHOR("Pradchaya Phucharoen");
+MODULE_DESCRIPTION("PMBus driver for Delta DPS200");
+MODULE_LICENSE("GPL");