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path: root/drivers/hwmon/pmbus/xdp710.c
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Diffstat (limited to 'drivers/hwmon/pmbus/xdp710.c')
-rw-r--r--drivers/hwmon/pmbus/xdp710.c131
1 files changed, 131 insertions, 0 deletions
diff --git a/drivers/hwmon/pmbus/xdp710.c b/drivers/hwmon/pmbus/xdp710.c
new file mode 100644
index 0000000000..dd107e83f6
--- /dev/null
+++ b/drivers/hwmon/pmbus/xdp710.c
@@ -0,0 +1,131 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Driver for Infineon XDP710 Hot-Swap Controller
+ */
+
+#include <linux/bitops.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include "pmbus.h"
+
+#define XDP710_REG_CFG 0xD3
+#define XDP710_V_SNS_CFG 0xD4
+#define XDP710_CS_RNG 0xD5
+
+/*
+ * The table to map configuration register values
+ * to sense resistor values
+ */
+static const int micro_ohm_rsense[] = {
+ 200, 250, 300, 330, 400, 470, 500, 600,
+ 670, 700, 750, 800, 900, 1000, 1100, 1200,
+ 1250, 1300, 1400, 1500, 1600, 1700, 1800, 1900,
+ 2000, 2100, 2200, 2300, 2400, 2500, 2600, 2700,
+ 2800, 3000, 3100, 3200, 3300, 3400, 3500, 3600,
+ 3700, 3800, 3900, 4000, 4100, 4200, 4300, 4400,
+ 4500, 4600, 4700, 4800, 4900, 5000, 5500, 6000,
+ 6500, 7000, 7500, 8000, 8500, 9000, 9500, 10000
+};
+
+static struct pmbus_driver_info xdp710_info = {
+ .pages = 1,
+ .format[PSC_VOLTAGE_IN] = direct,
+ .format[PSC_VOLTAGE_OUT] = direct,
+ .format[PSC_CURRENT_OUT] = direct,
+ .format[PSC_POWER] = direct,
+ .format[PSC_TEMPERATURE] = direct,
+ .m[PSC_VOLTAGE_IN] = 4653,
+ .b[PSC_VOLTAGE_IN] = 0,
+ .R[PSC_VOLTAGE_IN] = -2,
+ .m[PSC_VOLTAGE_OUT] = 4653,
+ .b[PSC_VOLTAGE_OUT] = 0,
+ .R[PSC_VOLTAGE_OUT] = -2,
+ .m[PSC_CURRENT_OUT] = 23165,
+ .b[PSC_CURRENT_OUT] = 0,
+ .R[PSC_CURRENT_OUT] = -2,
+ .m[PSC_POWER] = 4211,
+ .b[PSC_POWER] = 0,
+ .R[PSC_POWER] = -2,
+ .m[PSC_TEMPERATURE] = 52,
+ .b[PSC_TEMPERATURE] = 14321,
+ .R[PSC_TEMPERATURE] = -1,
+ .func[0] =
+ PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_PIN |
+ PMBUS_HAVE_TEMP | PMBUS_HAVE_IOUT |
+ PMBUS_HAVE_STATUS_INPUT | PMBUS_HAVE_STATUS_TEMP,
+};
+
+static int xdp710_probe(struct i2c_client *client)
+{
+ struct pmbus_driver_info *info;
+ u8 cs_rng;
+ u8 vtlm_rng;
+ int rsense;
+ int ret;
+ int m = 0;
+
+ info = devm_kmemdup(&client->dev, &xdp710_info, sizeof(*info),
+ GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ ret = i2c_smbus_read_word_data(client, XDP710_CS_RNG);
+ if (ret < 0) {
+ dev_err(&client->dev, "Can't get CS_RNG");
+ return ret;
+ }
+ cs_rng = (ret >> 6) & GENMASK(1, 0);
+
+ ret = i2c_smbus_read_word_data(client, XDP710_V_SNS_CFG);
+ if (ret < 0) {
+ dev_err(&client->dev, "Can't get V_SNS_CFG");
+ return ret;
+ }
+ vtlm_rng = ret & GENMASK(1, 0);
+
+ ret = i2c_smbus_read_word_data(client, XDP710_REG_CFG);
+ if (ret < 0) {
+ dev_err(&client->dev, "Can't get REG_CFG");
+ return ret;
+ }
+ ret &= GENMASK(5, 0);
+ rsense = micro_ohm_rsense[ret];
+
+ info->m[PSC_VOLTAGE_IN] <<= vtlm_rng;
+ info->m[PSC_VOLTAGE_OUT] <<= vtlm_rng;
+
+ m = info->m[PSC_CURRENT_OUT];
+ info->m[PSC_CURRENT_OUT] = DIV_ROUND_CLOSEST(m * rsense >> cs_rng, 1000);
+
+ m = info->m[PSC_POWER];
+ info->m[PSC_POWER] = DIV_ROUND_CLOSEST(m * rsense >> cs_rng, 1000);
+
+ return pmbus_do_probe(client, info);
+}
+
+static const struct of_device_id xdp710_of_match[] = {
+ { .compatible = "infineon,xdp710" },
+ {}
+};
+
+static const struct i2c_device_id xdp710_id[] = {
+ {"xdp710"},
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, xdp710_id);
+
+static struct i2c_driver xdp710_driver = {
+ .driver = {
+ .name = "xdp710",
+ .of_match_table = xdp710_of_match,
+ },
+ .probe = xdp710_probe,
+ .id_table = xdp710_id,
+};
+module_i2c_driver(xdp710_driver);
+
+MODULE_AUTHOR("Peter Yin <peter.yin@quantatw.com>");
+MODULE_DESCRIPTION("PMBus driver for XDP710 HSC");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS(PMBUS);