hwmon: (pmbus) Add client driver for LM25066, LM5064, and LM5066
PMBus client driver supporting National Semiconductor LM25066, LM5064, and LM5066.
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Reviewed-by: Robert Coulson <robert.coulson@ericsson.com>
diff --git a/drivers/hwmon/pmbus/lm25066.c b/drivers/hwmon/pmbus/lm25066.c
new file mode 100644
index 0000000..d4bc114
--- /dev/null
+++ b/drivers/hwmon/pmbus/lm25066.c
@@ -0,0 +1,340 @@
+/*
+ * Hardware monitoring driver for LM25066 / LM5064 / LM5066
+ *
+ * Copyright (c) 2011 Ericsson AB.
+ *
+ * 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/i2c.h>
+#include "pmbus.h"
+
+enum chips { lm25066, lm5064, lm5066 };
+
+#define LM25066_READ_VAUX 0xd0
+#define LM25066_MFR_READ_IIN 0xd1
+#define LM25066_MFR_READ_PIN 0xd2
+#define LM25066_MFR_IIN_OC_WARN_LIMIT 0xd3
+#define LM25066_MFR_PIN_OP_WARN_LIMIT 0xd4
+#define LM25066_READ_PIN_PEAK 0xd5
+#define LM25066_CLEAR_PIN_PEAK 0xd6
+#define LM25066_DEVICE_SETUP 0xd9
+#define LM25066_READ_AVG_VIN 0xdc
+#define LM25066_READ_AVG_VOUT 0xdd
+#define LM25066_READ_AVG_IIN 0xde
+#define LM25066_READ_AVG_PIN 0xdf
+
+#define LM25066_DEV_SETUP_CL (1 << 4) /* Current limit */
+
+struct lm25066_data {
+ int id;
+ struct pmbus_driver_info info;
+};
+
+#define to_lm25066_data(x) container_of(x, struct lm25066_data, info)
+
+static int lm25066_read_word_data(struct i2c_client *client, int page, int reg)
+{
+ const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
+ const struct lm25066_data *data = to_lm25066_data(info);
+ int ret;
+
+ if (page > 1)
+ return -EINVAL;
+
+ /* Map READ_VAUX into READ_VOUT register on page 1 */
+ if (page == 1) {
+ switch (reg) {
+ case PMBUS_READ_VOUT:
+ ret = pmbus_read_word_data(client, 0,
+ LM25066_READ_VAUX);
+ if (ret < 0)
+ break;
+ /* Adjust returned value to match VOUT coefficients */
+ switch (data->id) {
+ case lm25066:
+ /* VOUT: 4.54 mV VAUX: 283.2 uV LSB */
+ ret = DIV_ROUND_CLOSEST(ret * 2832, 45400);
+ break;
+ case lm5064:
+ /* VOUT: 4.53 mV VAUX: 700 uV LSB */
+ ret = DIV_ROUND_CLOSEST(ret * 70, 453);
+ break;
+ case lm5066:
+ /* VOUT: 2.18 mV VAUX: 725 uV LSB */
+ ret = DIV_ROUND_CLOSEST(ret * 725, 2180);
+ break;
+ }
+ break;
+ default:
+ /* No other valid registers on page 1 */
+ ret = -EINVAL;
+ break;
+ }
+ goto done;
+ }
+
+ switch (reg) {
+ case PMBUS_READ_IIN:
+ ret = pmbus_read_word_data(client, 0, LM25066_MFR_READ_IIN);
+ break;
+ case PMBUS_READ_PIN:
+ ret = pmbus_read_word_data(client, 0, LM25066_MFR_READ_PIN);
+ break;
+ case PMBUS_IIN_OC_WARN_LIMIT:
+ ret = pmbus_read_word_data(client, 0,
+ LM25066_MFR_IIN_OC_WARN_LIMIT);
+ break;
+ case PMBUS_PIN_OP_WARN_LIMIT:
+ ret = pmbus_read_word_data(client, 0,
+ LM25066_MFR_PIN_OP_WARN_LIMIT);
+ break;
+ case PMBUS_VIRT_READ_VIN_AVG:
+ ret = pmbus_read_word_data(client, 0, LM25066_READ_AVG_VIN);
+ break;
+ case PMBUS_VIRT_READ_VOUT_AVG:
+ ret = pmbus_read_word_data(client, 0, LM25066_READ_AVG_VOUT);
+ break;
+ case PMBUS_VIRT_READ_IIN_AVG:
+ ret = pmbus_read_word_data(client, 0, LM25066_READ_AVG_IIN);
+ break;
+ case PMBUS_VIRT_READ_PIN_AVG:
+ ret = pmbus_read_word_data(client, 0, LM25066_READ_AVG_PIN);
+ break;
+ case PMBUS_VIRT_READ_PIN_MAX:
+ ret = pmbus_read_word_data(client, 0, LM25066_READ_PIN_PEAK);
+ break;
+ case PMBUS_VIRT_RESET_PIN_HISTORY:
+ ret = 0;
+ break;
+ default:
+ ret = -ENODATA;
+ break;
+ }
+done:
+ return ret;
+}
+
+static int lm25066_write_word_data(struct i2c_client *client, int page, int reg,
+ u16 word)
+{
+ int ret;
+
+ if (page > 1)
+ return -EINVAL;
+
+ switch (reg) {
+ case PMBUS_IIN_OC_WARN_LIMIT:
+ ret = pmbus_write_word_data(client, 0,
+ LM25066_MFR_IIN_OC_WARN_LIMIT,
+ word);
+ break;
+ case PMBUS_PIN_OP_WARN_LIMIT:
+ ret = pmbus_write_word_data(client, 0,
+ LM25066_MFR_PIN_OP_WARN_LIMIT,
+ word);
+ break;
+ case PMBUS_VIRT_RESET_PIN_HISTORY:
+ ret = pmbus_write_byte(client, 0, LM25066_CLEAR_PIN_PEAK);
+ break;
+ default:
+ ret = -ENODATA;
+ break;
+ }
+ return ret;
+}
+
+static int lm25066_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ int config;
+ int ret;
+ struct lm25066_data *data;
+ struct pmbus_driver_info *info;
+
+ if (!i2c_check_functionality(client->adapter,
+ I2C_FUNC_SMBUS_READ_BYTE_DATA))
+ return -ENODEV;
+
+ data = kzalloc(sizeof(struct lm25066_data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ config = i2c_smbus_read_byte_data(client, LM25066_DEVICE_SETUP);
+ if (config < 0) {
+ ret = config;
+ goto err_mem;
+ }
+
+ data->id = id->driver_data;
+ info = &data->info;
+
+ info->pages = 2;
+ info->format[PSC_VOLTAGE_IN] = direct;
+ info->format[PSC_VOLTAGE_OUT] = direct;
+ info->format[PSC_CURRENT_IN] = direct;
+ info->format[PSC_TEMPERATURE] = direct;
+ info->format[PSC_POWER] = direct;
+
+ info->m[PSC_TEMPERATURE] = 16;
+ info->b[PSC_TEMPERATURE] = 0;
+ info->R[PSC_TEMPERATURE] = 0;
+
+ info->func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT
+ | PMBUS_HAVE_STATUS_VOUT | PMBUS_HAVE_PIN | PMBUS_HAVE_IIN
+ | PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
+ info->func[1] = PMBUS_HAVE_VOUT;
+
+ info->read_word_data = lm25066_read_word_data;
+ info->write_word_data = lm25066_write_word_data;
+
+ switch (id->driver_data) {
+ case lm25066:
+ info->m[PSC_VOLTAGE_IN] = 22070;
+ info->b[PSC_VOLTAGE_IN] = 0;
+ info->R[PSC_VOLTAGE_IN] = -2;
+ info->m[PSC_VOLTAGE_OUT] = 22070;
+ info->b[PSC_VOLTAGE_OUT] = 0;
+ info->R[PSC_VOLTAGE_OUT] = -2;
+
+ if (config & LM25066_DEV_SETUP_CL) {
+ info->m[PSC_CURRENT_IN] = 6852;
+ info->b[PSC_CURRENT_IN] = 0;
+ info->R[PSC_CURRENT_IN] = -2;
+ info->m[PSC_POWER] = 369;
+ info->b[PSC_POWER] = 0;
+ info->R[PSC_POWER] = -2;
+ } else {
+ info->m[PSC_CURRENT_IN] = 13661;
+ info->b[PSC_CURRENT_IN] = 0;
+ info->R[PSC_CURRENT_IN] = -2;
+ info->m[PSC_POWER] = 736;
+ info->b[PSC_POWER] = 0;
+ info->R[PSC_POWER] = -2;
+ }
+ break;
+ case lm5064:
+ info->m[PSC_VOLTAGE_IN] = 22075;
+ info->b[PSC_VOLTAGE_IN] = 0;
+ info->R[PSC_VOLTAGE_IN] = -2;
+ info->m[PSC_VOLTAGE_OUT] = 22075;
+ info->b[PSC_VOLTAGE_OUT] = 0;
+ info->R[PSC_VOLTAGE_OUT] = -2;
+
+ if (config & LM25066_DEV_SETUP_CL) {
+ info->m[PSC_CURRENT_IN] = 6713;
+ info->b[PSC_CURRENT_IN] = 0;
+ info->R[PSC_CURRENT_IN] = -2;
+ info->m[PSC_POWER] = 3619;
+ info->b[PSC_POWER] = 0;
+ info->R[PSC_POWER] = -3;
+ } else {
+ info->m[PSC_CURRENT_IN] = 13426;
+ info->b[PSC_CURRENT_IN] = 0;
+ info->R[PSC_CURRENT_IN] = -2;
+ info->m[PSC_POWER] = 7238;
+ info->b[PSC_POWER] = 0;
+ info->R[PSC_POWER] = -3;
+ }
+ break;
+ case lm5066:
+ info->m[PSC_VOLTAGE_IN] = 4587;
+ info->b[PSC_VOLTAGE_IN] = 0;
+ info->R[PSC_VOLTAGE_IN] = -2;
+ info->m[PSC_VOLTAGE_OUT] = 4587;
+ info->b[PSC_VOLTAGE_OUT] = 0;
+ info->R[PSC_VOLTAGE_OUT] = -2;
+
+ if (config & LM25066_DEV_SETUP_CL) {
+ info->m[PSC_CURRENT_IN] = 10753;
+ info->b[PSC_CURRENT_IN] = 0;
+ info->R[PSC_CURRENT_IN] = -2;
+ info->m[PSC_POWER] = 1204;
+ info->b[PSC_POWER] = 0;
+ info->R[PSC_POWER] = -3;
+ } else {
+ info->m[PSC_CURRENT_IN] = 5405;
+ info->b[PSC_CURRENT_IN] = 0;
+ info->R[PSC_CURRENT_IN] = -2;
+ info->m[PSC_POWER] = 605;
+ info->b[PSC_POWER] = 0;
+ info->R[PSC_POWER] = -3;
+ }
+ break;
+ default:
+ ret = -ENODEV;
+ goto err_mem;
+ }
+
+ ret = pmbus_do_probe(client, id, info);
+ if (ret)
+ goto err_mem;
+ return 0;
+
+err_mem:
+ kfree(data);
+ return ret;
+}
+
+static int lm25066_remove(struct i2c_client *client)
+{
+ const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
+ const struct lm25066_data *data = to_lm25066_data(info);
+ int ret;
+
+ ret = pmbus_do_remove(client);
+ kfree(data);
+ return ret;
+}
+
+static const struct i2c_device_id lm25066_id[] = {
+ {"lm25066", lm25066},
+ {"lm5064", lm5064},
+ {"lm5066", lm5066},
+ { }
+};
+
+MODULE_DEVICE_TABLE(i2c, lm25066_id);
+
+/* This is the driver that will be inserted */
+static struct i2c_driver lm25066_driver = {
+ .driver = {
+ .name = "lm25066",
+ },
+ .probe = lm25066_probe,
+ .remove = lm25066_remove,
+ .id_table = lm25066_id,
+};
+
+static int __init lm25066_init(void)
+{
+ return i2c_add_driver(&lm25066_driver);
+}
+
+static void __exit lm25066_exit(void)
+{
+ i2c_del_driver(&lm25066_driver);
+}
+
+MODULE_AUTHOR("Guenter Roeck");
+MODULE_DESCRIPTION("PMBus driver for LM25066/LM5064/LM5066");
+MODULE_LICENSE("GPL");
+module_init(lm25066_init);
+module_exit(lm25066_exit);