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path: root/drivers/hwmon/pmbus/mp2975.c
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Diffstat (limited to 'drivers/hwmon/pmbus/mp2975.c')
-rw-r--r--drivers/hwmon/pmbus/mp2975.c136
1 files changed, 111 insertions, 25 deletions
diff --git a/drivers/hwmon/pmbus/mp2975.c b/drivers/hwmon/pmbus/mp2975.c
index e5fa10b3b8bc..280bb12f762c 100644
--- a/drivers/hwmon/pmbus/mp2975.c
+++ b/drivers/hwmon/pmbus/mp2975.c
@@ -5,12 +5,14 @@
* Copyright (C) 2020 Nvidia Technologies Ltd.
*/
+#include <linux/bitops.h>
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/kernel.h>
+#include <linux/mod_devicetable.h>
#include <linux/module.h>
-#include <linux/of_device.h>
+
#include "pmbus.h"
/* Vendor specific registers. */
@@ -97,6 +99,11 @@ static const int mp2975_max_phases[][MP2975_PAGE_NUM] = {
[mp2971] = { MP2971_MAX_PHASE_RAIL1, MP2971_MAX_PHASE_RAIL2 },
};
+struct mp2975_driver_info {
+ const struct pmbus_driver_info *info;
+ enum chips chip_id;
+};
+
struct mp2975_data {
struct pmbus_driver_info info;
enum chips chip_id;
@@ -110,15 +117,6 @@ struct mp2975_data {
int curr_sense_gain[MP2975_PAGE_NUM];
};
-static const struct i2c_device_id mp2975_id[] = {
- {"mp2971", mp2971},
- {"mp2973", mp2973},
- {"mp2975", mp2975},
- {}
-};
-
-MODULE_DEVICE_TABLE(i2c, mp2975_id);
-
static const struct regulator_desc __maybe_unused mp2975_reg_desc[] = {
PMBUS_REGULATOR("vout", 0),
PMBUS_REGULATOR("vout", 1),
@@ -392,6 +390,80 @@ static int mp2973_read_word_data(struct i2c_client *client, int page,
return ret;
}
+static int mp2973_write_word_data(struct i2c_client *client, int page,
+ int reg, u16 word)
+{
+ u8 target, mask;
+ long ret;
+
+ if (reg != PMBUS_SMBALERT_MASK)
+ return -ENODATA;
+
+ /*
+ * Vendor-specific SMBALERT_MASK register with 16 maskable bits.
+ */
+ ret = pmbus_read_word_data(client, 0, 0, PMBUS_SMBALERT_MASK);
+ if (ret < 0)
+ return ret;
+
+ target = word & 0xff;
+ mask = word >> 8;
+
+/*
+ * Set/Clear 'bit' in 'ret' based on condition followed by define for each bit in SMBALERT_MASK.
+ * Also bit 2 & 15 are reserved.
+ */
+
+#define MP2973_TEMP_OT 0
+#define MP2973_VIN_UVLO 1
+#define MP2973_VIN_OVP 3
+#define MP2973_MTP_FAULT 4
+#define MP2973_OTHER_COMM 5
+#define MP2973_MTP_BLK_TRIG 6
+#define MP2973_PACKET_ERROR 7
+#define MP2973_INVALID_DATA 8
+#define MP2973_INVALID_COMMAND 9
+#define MP2973_IOUT_OC_LV 10
+#define MP2973_IOUT_OC 11
+#define MP2973_VOUT_MAX_MIN_WARNING 12
+#define MP2973_VOLTAGE_UV 13
+#define MP2973_VOLTAGE_OV 14
+
+ switch (target) {
+ case PMBUS_STATUS_CML:
+ __assign_bit(MP2973_INVALID_DATA, &ret, !(mask & PB_CML_FAULT_INVALID_DATA));
+ __assign_bit(MP2973_INVALID_COMMAND, &ret, !(mask & PB_CML_FAULT_INVALID_COMMAND));
+ __assign_bit(MP2973_OTHER_COMM, &ret, !(mask & PB_CML_FAULT_OTHER_COMM));
+ __assign_bit(MP2973_PACKET_ERROR, &ret, !(mask & PB_CML_FAULT_PACKET_ERROR));
+ break;
+ case PMBUS_STATUS_VOUT:
+ __assign_bit(MP2973_VOLTAGE_UV, &ret, !(mask & PB_VOLTAGE_UV_FAULT));
+ __assign_bit(MP2973_VOLTAGE_OV, &ret, !(mask & PB_VOLTAGE_OV_FAULT));
+ break;
+ case PMBUS_STATUS_IOUT:
+ __assign_bit(MP2973_IOUT_OC, &ret, !(mask & PB_IOUT_OC_FAULT));
+ __assign_bit(MP2973_IOUT_OC_LV, &ret, !(mask & PB_IOUT_OC_LV_FAULT));
+ break;
+ case PMBUS_STATUS_TEMPERATURE:
+ __assign_bit(MP2973_TEMP_OT, &ret, !(mask & PB_TEMP_OT_FAULT));
+ break;
+ /*
+ * Map remaining bits to MFR specific to let the PMBUS core mask
+ * those bits by default.
+ */
+ case PMBUS_STATUS_MFR_SPECIFIC:
+ __assign_bit(MP2973_VIN_UVLO, &ret, !(mask & BIT(1)));
+ __assign_bit(MP2973_VIN_OVP, &ret, !(mask & BIT(3)));
+ __assign_bit(MP2973_MTP_FAULT, &ret, !(mask & BIT(4)));
+ __assign_bit(MP2973_MTP_BLK_TRIG, &ret, !(mask & BIT(6)));
+ break;
+ default:
+ return 0;
+ }
+
+ return pmbus_write_word_data(client, 0, PMBUS_SMBALERT_MASK, ret);
+}
+
static int mp2975_read_word_data(struct i2c_client *client, int page,
int phase, int reg)
{
@@ -867,7 +939,7 @@ mp2975_vout_per_rail_config_get(struct i2c_client *client,
return 0;
}
-static struct pmbus_driver_info mp2975_info = {
+static const struct pmbus_driver_info mp2975_info = {
.pages = 1,
.format[PSC_VOLTAGE_IN] = linear,
.format[PSC_VOLTAGE_OUT] = direct,
@@ -892,7 +964,7 @@ static struct pmbus_driver_info mp2975_info = {
#endif
};
-static struct pmbus_driver_info mp2973_info = {
+static const struct pmbus_driver_info mp2973_info = {
.pages = 1,
.format[PSC_VOLTAGE_IN] = linear,
.format[PSC_VOLTAGE_OUT] = direct,
@@ -907,35 +979,41 @@ static struct pmbus_driver_info mp2973_info = {
PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP | PMBUS_HAVE_POUT |
PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT,
.read_word_data = mp2973_read_word_data,
+ .write_word_data = mp2973_write_word_data,
#if IS_ENABLED(CONFIG_SENSORS_MP2975_REGULATOR)
.num_regulators = 1,
.reg_desc = mp2975_reg_desc,
#endif
};
+static const struct mp2975_driver_info mp2975_ddinfo[] = {
+ [mp2975] = { .info = &mp2975_info, .chip_id = mp2975 },
+ [mp2973] = { .info = &mp2973_info, .chip_id = mp2973 },
+ [mp2971] = { .info = &mp2973_info, .chip_id = mp2971 },
+};
+
static int mp2975_probe(struct i2c_client *client)
{
+ const struct mp2975_driver_info *ddinfo;
struct pmbus_driver_info *info;
struct mp2975_data *data;
int ret;
+ ddinfo = i2c_get_match_data(client);
+ if (!ddinfo)
+ return -ENODEV;
+
data = devm_kzalloc(&client->dev, sizeof(struct mp2975_data),
GFP_KERNEL);
if (!data)
return -ENOMEM;
- if (client->dev.of_node)
- data->chip_id = (enum chips)(unsigned long)of_device_get_match_data(&client->dev);
- else
- data->chip_id = i2c_match_id(mp2975_id, client)->driver_data;
+ data->chip_id = ddinfo->chip_id;
memcpy(data->max_phases, mp2975_max_phases[data->chip_id],
sizeof(data->max_phases));
- if (data->chip_id == mp2975)
- memcpy(&data->info, &mp2975_info, sizeof(*info));
- else
- memcpy(&data->info, &mp2973_info, sizeof(*info));
+ memcpy(&data->info, ddinfo->info, sizeof(data->info));
info = &data->info;
@@ -993,18 +1071,26 @@ static int mp2975_probe(struct i2c_client *client)
return pmbus_do_probe(client, info);
}
-static const struct of_device_id __maybe_unused mp2975_of_match[] = {
- {.compatible = "mps,mp2971", .data = (void *)mp2971},
- {.compatible = "mps,mp2973", .data = (void *)mp2973},
- {.compatible = "mps,mp2975", .data = (void *)mp2975},
+static const struct of_device_id mp2975_of_match[] = {
+ {.compatible = "mps,mp2971", .data = &mp2975_ddinfo[mp2971]},
+ {.compatible = "mps,mp2973", .data = &mp2975_ddinfo[mp2973]},
+ {.compatible = "mps,mp2975", .data = &mp2975_ddinfo[mp2975]},
{}
};
MODULE_DEVICE_TABLE(of, mp2975_of_match);
+static const struct i2c_device_id mp2975_id[] = {
+ {"mp2971", (kernel_ulong_t)&mp2975_ddinfo[mp2971]},
+ {"mp2973", (kernel_ulong_t)&mp2975_ddinfo[mp2973]},
+ {"mp2975", (kernel_ulong_t)&mp2975_ddinfo[mp2975]},
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, mp2975_id);
+
static struct i2c_driver mp2975_driver = {
.driver = {
.name = "mp2975",
- .of_match_table = of_match_ptr(mp2975_of_match),
+ .of_match_table = mp2975_of_match,
},
.probe = mp2975_probe,
.id_table = mp2975_id,
generated by cgit v1.2.3 (git 2.39.0) at 2024-08-16 18:09:08 +0300