TPS53688 supports historical registers. Patch allows exposing the next
attributes for the historical registers in 'sysfs':
- curr{x}_reset_history;
- in{x}_reset_history;
- power{x}_reset_history;
- temp{x}_reset_history;
- curr{x}_highest;
- in{x}_highest;
- power{x}_input_highest;
- temp{x}_highest;
- curr{x}_lowest;
- in{x}_lowest;
- power{x}_input_lowest;
- temp{x}_lowest.
This patch is required patch:
"hwmon: (pmbus/core) Add callback for register to data conversion".
Signed-off-by: Vadim Pasternak <vadimp@xxxxxxxxxxxx>
v2->v3:
Fix added by Vadim:
- Fix offsets for read buffer.
v1->v2:
Comments pointed out by Guenter:
- Drop tps53688_reg2data();
- Replace i2c_smbus_read_i2c_block_data() and
i2c_smbus_write_i2c_block_data() with i2c_smbus_read_block_data()
and i2c_smbus_write_block_data();
- Drop 'unused' parameter in tps53688_get_history();
- Fix host byte order in tps53688_get_history();
- Rename tps53688_reset_history_all() to
tps53688_start_logging_all();
---
drivers/hwmon/pmbus/tps53679.c | 242 ++++++++++++++++++++++++++++++++++++++++-
1 file changed, 241 insertions(+), 1 deletion(-)
diff --git a/drivers/hwmon/pmbus/tps53679.c b/drivers/hwmon/pmbus/tps53679.c
index 157c99ffb52b..dc2a32307f2a 100644
--- a/drivers/hwmon/pmbus/tps53679.c
+++ b/drivers/hwmon/pmbus/tps53679.c
@@ -34,6 +34,226 @@ enum chips {
#define TPS53681_MFR_SPECIFIC_20 0xe4 /* Number of phases, per page */
+/* Registers for highest and lowest historical values records */
+#define TPS53688_VOUT_PEAK 0xd1
+#define TPS53688_IOUT_PEAK 0xd2
+#define TPS53688_TEMP_PEAK 0xd3
+#define TPS53688_VIN_PEAK 0xd5
+#define TPS53688_IIN_PEAK 0xd6
+#define TPS53688_PIN_PEAK 0xd7
+#define TPS53688_POUT_PEAK 0xd8
+#define TPS53688_HISTORY_REG_MIN_OFFSET 2
+#define TPS53688_HISTORY_REG_MAX_OFFSET 0
+
+const static u8 tps53688_reset_logging[] = { 0x00, 0x01, 0x00, 0x00 };
+const static u8 tps53688_resume_logging[] = { 0x20, 0x00, 0x00, 0x00 };
+
+static int
+tps53688_get_history(struct i2c_client *client, int reg, int page, int offset)
+{
+ const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
+ u8 buf[I2C_SMBUS_BLOCK_MAX];
+ s16 exponent;
+ s32 mantissa;
+ long val;
+ int ret;
+
+ ret = pmbus_set_page(client, page, 0);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_read_block_data(client, reg, buf);
+ if (ret < 0)
+ return ret;
+
+ ret = le16_to_cpu(*(u16 *)(buf + offset));
+ if (reg == TPS53688_VOUT_PEAK) {
+ /* Convert register value to LINEAR11 data. */
+ exponent = ((s16)ret) >> 11;
+ mantissa = ((s16)((ret & GENMASK(10, 0)) << 5)) >> 5;
+ val = mantissa * 1000L;
+ if (exponent >= 0)
+ val <<= exponent;
+ else
+ val >>= -exponent;
+
+ /* Convert data to VID register. */
+ switch (info->vrm_version[page]) {
+ case vr13:
+ if (val >= 500)
+ return 1 + DIV_ROUND_CLOSEST(val - 500, 10);
+ return 0;
+ case vr12:
+ if (val >= 250)
+ return 1 + DIV_ROUND_CLOSEST(val - 250, 5);
+ return 0;
+ default:
+ return -EINVAL;
+ }
+ }
+
+ return ret;
+}
+
+static int
+tps53688_reset_history(struct i2c_client *client, int reg)
+{
+ int ret;
+
+ ret = i2c_smbus_write_block_data(client, reg,
+ ARRAY_SIZE(tps53688_reset_logging),
+ tps53688_reset_logging);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_write_block_data(client, reg,
+ ARRAY_SIZE(tps53688_resume_logging),
+ tps53688_resume_logging);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int tps53688_start_logging_all(struct i2c_client *client, int page)
+{
+ int ret;
+
+ ret = pmbus_set_page(client, page, 0);
+ if (ret < 0)
+ return ret;
+
+ ret = tps53688_reset_history(client, TPS53688_TEMP_PEAK);
+ ret = !ret ? tps53688_reset_history(client, TPS53688_VIN_PEAK) : ret;
+ ret = !ret ? tps53688_reset_history(client, TPS53688_IIN_PEAK) : ret;
+ ret = !ret ? tps53688_reset_history(client, TPS53688_PIN_PEAK) : ret;
+ ret = !ret ? tps53688_reset_history(client, TPS53688_POUT_PEAK) : ret;
+ ret = !ret ? tps53688_reset_history(client, TPS53688_VOUT_PEAK) : ret;
+ ret = !ret ? tps53688_reset_history(client, TPS53688_IOUT_PEAK) : ret;
+
+ return ret;
+}
+
+static int tps53688_read_word_data(struct i2c_client *client, int page,
+ int unused, int reg)
+{
+ int histreg, offset;
+
+ switch (reg) {
+ case PMBUS_VIRT_READ_TEMP_MIN:
+ histreg = TPS53688_TEMP_PEAK;
+ offset = TPS53688_HISTORY_REG_MIN_OFFSET;
+ break;
+ case PMBUS_VIRT_READ_TEMP_MAX:
+ histreg = TPS53688_TEMP_PEAK;
+ offset = TPS53688_HISTORY_REG_MAX_OFFSET;
+ break;
+ case PMBUS_VIRT_READ_VIN_MIN:
+ histreg = TPS53688_VIN_PEAK;
+ offset = TPS53688_HISTORY_REG_MIN_OFFSET;
+ break;
+ case PMBUS_VIRT_READ_VIN_MAX:
+ histreg = TPS53688_VIN_PEAK;
+ offset = TPS53688_HISTORY_REG_MAX_OFFSET;
+ break;
+ case PMBUS_VIRT_READ_IIN_MIN:
+ histreg = TPS53688_IIN_PEAK;
+ offset = TPS53688_HISTORY_REG_MIN_OFFSET;
+ break;
+ case PMBUS_VIRT_READ_IIN_MAX:
+ histreg = TPS53688_IIN_PEAK;
+ offset = TPS53688_HISTORY_REG_MAX_OFFSET;
+ break;
+ case PMBUS_VIRT_READ_PIN_MIN:
+ histreg = TPS53688_PIN_PEAK;
+ offset = TPS53688_HISTORY_REG_MIN_OFFSET;
+ break;
+ case PMBUS_VIRT_READ_PIN_MAX:
+ histreg = TPS53688_PIN_PEAK;
+ offset = TPS53688_HISTORY_REG_MAX_OFFSET;
+ break;
+ case PMBUS_VIRT_READ_POUT_MIN:
+ histreg = TPS53688_POUT_PEAK;
+ offset = TPS53688_HISTORY_REG_MIN_OFFSET;
+ break;
+ case PMBUS_VIRT_READ_POUT_MAX:
+ histreg = TPS53688_POUT_PEAK;
+ offset = TPS53688_HISTORY_REG_MAX_OFFSET;
+ break;
+ case PMBUS_VIRT_READ_VOUT_MIN:
+ histreg = TPS53688_VOUT_PEAK;
+ offset = TPS53688_HISTORY_REG_MIN_OFFSET;
+ break;
+ case PMBUS_VIRT_READ_VOUT_MAX:
+ histreg = TPS53688_VOUT_PEAK;
+ offset = TPS53688_HISTORY_REG_MAX_OFFSET;
+ break;
+ case PMBUS_VIRT_READ_IOUT_MIN:
+ histreg = TPS53688_IOUT_PEAK;
+ offset = TPS53688_HISTORY_REG_MIN_OFFSET;
+ break;
+ case PMBUS_VIRT_READ_IOUT_MAX:
+ histreg = TPS53688_IOUT_PEAK;
+ offset = TPS53688_HISTORY_REG_MAX_OFFSET;
+ break;
+ case PMBUS_VIRT_READ_TEMP2_MIN:
+ histreg = TPS53688_TEMP_PEAK;
+ offset = TPS53688_HISTORY_REG_MIN_OFFSET;
+ break;
+ case PMBUS_VIRT_READ_TEMP2_MAX:
+ histreg = TPS53688_TEMP_PEAK;
+ offset = TPS53688_HISTORY_REG_MAX_OFFSET;
+ break;
+ case PMBUS_VIRT_RESET_TEMP_HISTORY:
+ case PMBUS_VIRT_RESET_TEMP2_HISTORY:
+ case PMBUS_VIRT_RESET_VIN_HISTORY:
+ case PMBUS_VIRT_RESET_IIN_HISTORY:
+ case PMBUS_VIRT_RESET_PIN_HISTORY:
+ case PMBUS_VIRT_RESET_POUT_HISTORY:
+ case PMBUS_VIRT_RESET_VOUT_HISTORY:
+ case PMBUS_VIRT_RESET_IOUT_HISTORY:
+ return 0;
+ default:
+ return -ENODATA;
+ }
+
+ return tps53688_get_history(client, histreg, page, offset);
+}
+
+static int tps53688_write_word_data(struct i2c_client *client, int unused1,
+ int reg, u16 unused2)
+{
+ int ret;
+
+ switch (reg) {
+ case PMBUS_VIRT_RESET_TEMP_HISTORY:
+ case PMBUS_VIRT_RESET_TEMP2_HISTORY:
+ ret = tps53688_reset_history(client, TPS53688_TEMP_PEAK);
+ break;
+ case PMBUS_VIRT_RESET_VIN_HISTORY:
+ ret = tps53688_reset_history(client, TPS53688_VIN_PEAK);
+ break;
+ case PMBUS_VIRT_RESET_IIN_HISTORY:
+ ret = tps53688_reset_history(client, TPS53688_IIN_PEAK);
+ break;
+ case PMBUS_VIRT_RESET_PIN_HISTORY:
+ ret = tps53688_reset_history(client, TPS53688_PIN_PEAK);
+ break;
+ case PMBUS_VIRT_RESET_POUT_HISTORY:
+ ret = tps53688_reset_history(client, TPS53688_POUT_PEAK);
+ break;
+ case PMBUS_VIRT_RESET_VOUT_HISTORY:
+ ret = tps53688_reset_history(client, TPS53688_VOUT_PEAK);
+ break;
+ case PMBUS_VIRT_RESET_IOUT_HISTORY:
+ ret = tps53688_reset_history(client, TPS53688_IOUT_PEAK);
+ break;
+ default:
+ return -ENODATA;
+ }
+ return ret;
+}
+
static int tps53679_identify_mode(struct i2c_client *client,
struct pmbus_driver_info *info)
{
@@ -188,7 +408,9 @@ static int tps53679_probe(struct i2c_client *client,
{
struct device *dev = &client->dev;
struct pmbus_driver_info *info;
+ bool reset_history = false;
enum chips chip_id;
+ int i, ret;
if (dev->of_node)
chip_id = (enum chips)of_device_get_match_data(dev);
@@ -206,9 +428,15 @@ static int tps53679_probe(struct i2c_client *client,
info->identify = tps53679_identify;
break;
case tps53679:
+ info->pages = TPS53679_PAGE_NUM;
+ info->identify = tps53679_identify;
+ break;
case tps53688:
info->pages = TPS53679_PAGE_NUM;
info->identify = tps53679_identify;
+ info->read_word_data = tps53688_read_word_data;
+ info->write_word_data = tps53688_write_word_data;
+ reset_history = true;
break;
case tps53681:
info->pages = TPS53679_PAGE_NUM;
@@ -220,7 +448,19 @@ static int tps53679_probe(struct i2c_client *client,
return -ENODEV;
}
- return pmbus_do_probe(client, id, info);
+ ret = pmbus_do_probe(client, id, info);
+ if (ret)
+ return ret;
+
+ if (reset_history) {
+ for (i = 0; i < info->pages; i++) {
+ ret = tps53688_start_logging_all(client, i);
+ if (ret)
+ return ret;
+ }
+ }
+
+ return ret;
}
static const struct i2c_device_id tps53679_id[] = {
--
2.11.0
