[PATCH linux] [PATCH] HWMON: Add OCC hwmon driver
OpenBMC Patches
openbmc-patches at stwcx.xyz
Tue Jan 5 18:00:34 AEDT 2016
From: Yi Li <adamliyi at msn.com>
This patch add a hwmon driver for BMC to monitor POWER CPU sensors
via OCC (On-Chip-Controller).
Changes for this version:
1. Fixed checkpatch.pl warnings and errors.
2. Fixed issue from Joel Stanley's review
3. Add a new sysfs interface: '/sys/class/i2c-adaptor/i2c-x/x-yyyy/online',
to notify the driver OCC is active.
4. Use device table to instantiate the occ-i2c device.
Signed-off-by: Yi Li <adamliyi at msn.com>
---
arch/arm/boot/dts/aspeed-bmc-opp-barreleye.dts | 10 +
arch/arm/boot/dts/aspeed-bmc-opp-palmetto.dts | 7 +
drivers/hwmon/Kconfig | 10 +
drivers/hwmon/Makefile | 1 +
drivers/hwmon/occ_i2c.c | 1339 ++++++++++++++++++++++++
5 files changed, 1367 insertions(+)
create mode 100644 drivers/hwmon/occ_i2c.c
diff --git a/arch/arm/boot/dts/aspeed-bmc-opp-barreleye.dts b/arch/arm/boot/dts/aspeed-bmc-opp-barreleye.dts
index 38a4fd0..a3518b0 100644
--- a/arch/arm/boot/dts/aspeed-bmc-opp-barreleye.dts
+++ b/arch/arm/boot/dts/aspeed-bmc-opp-barreleye.dts
@@ -25,6 +25,16 @@
reg = <0x4a>;
};
};
+ i2c3: i2c-bus at 100 {
+ occ at 50 {
+ compatible = "ibm,occ-i2c";
+ reg = <0x50>;
+ };
+ occ at 51 {
+ compatible = "ibm,occ-i2c";
+ reg = <0x51>;
+ };
+ };
i2c6: i2c-bus at 1c0 {
nct7904 at 2d {
diff --git a/arch/arm/boot/dts/aspeed-bmc-opp-palmetto.dts b/arch/arm/boot/dts/aspeed-bmc-opp-palmetto.dts
index 92a7c77..45a032d 100644
--- a/arch/arm/boot/dts/aspeed-bmc-opp-palmetto.dts
+++ b/arch/arm/boot/dts/aspeed-bmc-opp-palmetto.dts
@@ -29,6 +29,13 @@
reg = <0x4c>;
};
};
+
+ i2c3: i2c-bus at 100 {
+ occ at 50 {
+ compatible = "ibm,occ-i2c";
+ reg = <0x50>;
+ };
+ };
};
};
};
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index e13c902..7c74854 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -1167,6 +1167,16 @@ config SENSORS_NCT7904
This driver can also be built as a module. If so, the module
will be called nct7904.
+config SENSORS_OCC
+ tristate "OCC sensor BMC driver"
+ depends on I2C
+ help
+ If you say yes here you get support for BMC to monitor IBM
+ Power CPU sensors via the On-Chip-Controller (OCC).
+
+ This driver can aslo be built as a module. If so, the module
+ will be called occ_i2c.
+
config SENSORS_PCF8591
tristate "Philips PCF8591 ADC/DAC"
depends on I2C
diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
index 9e0f3dd..d6fa923 100644
--- a/drivers/hwmon/Makefile
+++ b/drivers/hwmon/Makefile
@@ -123,6 +123,7 @@ obj-$(CONFIG_SENSORS_NCT6775) += nct6775.o
obj-$(CONFIG_SENSORS_NCT7802) += nct7802.o
obj-$(CONFIG_SENSORS_NCT7904) += nct7904.o
obj-$(CONFIG_SENSORS_NTC_THERMISTOR) += ntc_thermistor.o
+obj-$(CONFIG_SENSORS_OCC) += occ_i2c.o
obj-$(CONFIG_SENSORS_PC87360) += pc87360.o
obj-$(CONFIG_SENSORS_PC87427) += pc87427.o
obj-$(CONFIG_SENSORS_PCF8591) += pcf8591.o
diff --git a/drivers/hwmon/occ_i2c.c b/drivers/hwmon/occ_i2c.c
new file mode 100644
index 0000000..38be953
--- /dev/null
+++ b/drivers/hwmon/occ_i2c.c
@@ -0,0 +1,1339 @@
+/*
+ * BMC OCC HWMON driver - read IBM Power8 OCC (On Chip Controller)
+ * sensor data via i2c.
+ *
+ * Copyright (c) 2015 IBM (Alvin Wang, Li Yi)
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/jiffies.h>
+#include <linux/i2c.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/delay.h>
+#include <linux/kernel.h>
+#include <linux/device.h>
+
+
+#define OCC_I2C_ADDR 0x50
+#define OCC_I2C_NAME "occ-i2c"
+
+#define OCC_DATA_MAX 4096 /* 4KB at most */
+/* i2c read and write occ sensors */
+#define I2C_READ_ERROR 1
+#define I2C_WRITE_ERROR 2
+
+/* To generate attn to OCC */
+#define ATTN_DATA 0x0006B035
+/* For BMC to read/write SRAM */
+#define OCB_ADDRESS 0x0006B070
+#define OCB_DATA 0x0006B075
+#define OCB_STATUS_CONTROL_AND 0x0006B072
+#define OCB_STATUS_CONTROL_OR 0x0006B073
+/* See definition in:
+ * https://github.com/open-power/docs/blob/master/occ/OCC_OpenPwr_FW_Interfaces.pdf
+ */
+#define OCC_COMMAND_ADDR 0xFFFF6000
+#define OCC_RESPONSE_ADDR 0xFFFF7000
+
+/* OCC sensor data format */
+struct occ_sensor {
+ uint16_t sensor_id;
+ uint16_t value;
+};
+
+struct power_sensor {
+ uint16_t sensor_id;
+ uint32_t update_tag;
+ uint32_t accumulator;
+ uint16_t value;
+};
+
+struct caps_sensor {
+ uint16_t curr_powercap;
+ uint16_t curr_powerreading;
+ uint16_t norm_powercap;
+ uint16_t max_powercap;
+ uint16_t min_powercap;
+ uint16_t user_powerlimit;
+};
+
+struct sensor_data_block {
+ uint8_t sensor_type[4];
+ uint8_t reserved0;
+ uint8_t sensor_format;
+ uint8_t sensor_length;
+ uint8_t num_of_sensors;
+ struct occ_sensor *sensor;
+ struct power_sensor *power;
+ struct caps_sensor *caps;
+};
+
+struct occ_poll_header {
+ uint8_t status;
+ uint8_t ext_status;
+ uint8_t occs_present;
+ uint8_t config;
+ uint8_t occ_state;
+ uint8_t reserved0;
+ uint8_t reserved1;
+ uint8_t error_log_id;
+ uint32_t error_log_addr_start;
+ uint16_t error_log_length;
+ uint8_t reserved2;
+ uint8_t reserved3;
+ uint8_t occ_code_level[16];
+ uint8_t sensor_eye_catcher[6];
+ uint8_t sensor_block_num;
+ uint8_t sensor_data_version;
+};
+
+struct occ_response {
+ uint8_t sequence_num;
+ uint8_t cmd_type;
+ uint8_t rtn_status;
+ uint16_t data_length;
+ struct occ_poll_header header;
+ struct sensor_data_block *blocks;
+ uint16_t chk_sum;
+ int temp_block_id;
+ int freq_block_id;
+ int power_block_id;
+ int caps_block_id;
+};
+
+/* data private to each client */
+struct occ_drv_data {
+ struct i2c_client *client;
+ struct device *hwmon_dev;
+ struct mutex update_lock;
+ bool valid;
+ unsigned long last_updated;
+ /* Minimum timer interval for sampling In jiffies */
+ unsigned long update_interval;
+ unsigned long occ_online;
+ struct occ_response occ_resp;
+};
+
+enum sensor_t {
+ freq,
+ temp,
+ power,
+ caps
+};
+
+static void deinit_occ_resp_buf(struct occ_response *p)
+{
+ int i;
+
+ if (!p)
+ return;
+
+ if (!p->blocks)
+ return;
+
+ for (i = 0; i < p->header.sensor_block_num; i++) {
+ kfree(p->blocks[i].sensor);
+ kfree(p->blocks[i].power);
+ kfree(p->blocks[i].caps);
+ }
+
+ kfree(p->blocks);
+
+ memset(p, 0, sizeof(*p));
+ p->freq_block_id = -1;
+ p->temp_block_id = -1;
+ p->power_block_id = -1;
+ p->caps_block_id = -1;
+}
+
+static ssize_t occ_i2c_read(struct i2c_client *client, void *buf, size_t count)
+{
+ WARN_ON(count > OCC_DATA_MAX);
+
+ dev_dbg(&client->dev, "i2c_read: reading %zu bytes @0x%x.\n",
+ count, client->addr);
+ return i2c_master_recv(client, buf, count);
+}
+
+static ssize_t occ_i2c_write(struct i2c_client *client, const void *buf,
+ size_t count)
+{
+ WARN_ON(count > OCC_DATA_MAX);
+
+ dev_dbg(&client->dev, "i2c_write: writing %zu bytes @0x%x.\n",
+ count, client->addr);
+ return i2c_master_send(client, buf, count);
+}
+
+/* read 8-byte value and put into data[offset] */
+static int occ_getscomb(struct i2c_client *client, uint32_t address,
+ uint8_t *data, int offset)
+{
+ uint32_t ret;
+ char buf[8];
+ int i = 0;
+
+ /* P8 i2c slave requires address to be shifted by 1 */
+ address = address << 1;
+
+ ret = occ_i2c_write(client, &address,
+ sizeof(address));
+
+ if (ret != sizeof(address))
+ return -I2C_WRITE_ERROR;
+
+ ret = occ_i2c_read(client, buf, sizeof(buf));
+ if (ret != sizeof(buf))
+ return -I2C_READ_ERROR;
+
+ for (i = 0; i < 8; i++)
+ data[offset + i] = buf[7 - i];
+
+ return 0;
+}
+
+static int occ_putscom(struct i2c_client *client, uint32_t address,
+ uint32_t data0, uint32_t data1)
+{
+ uint32_t buf[3];
+ uint32_t ret;
+
+ /* P8 i2c slave requires address to be shifted by 1 */
+ address = address << 1;
+
+ buf[0] = address;
+ buf[1] = data1;
+ buf[2] = data0;
+
+ ret = occ_i2c_write(client, buf, sizeof(buf));
+ if (ret != sizeof(buf))
+ return I2C_WRITE_ERROR;
+
+ return 0;
+}
+
+static void *occ_get_sensor_by_type(struct occ_response *resp, enum sensor_t t)
+{
+ void *sensor;
+
+ if (!resp->blocks)
+ return NULL;
+
+ switch (t) {
+ case temp:
+ sensor = (resp->temp_block_id == -1) ? NULL :
+ resp->blocks[resp->temp_block_id].sensor;
+ break;
+ case freq:
+ sensor = (resp->freq_block_id == -1) ? NULL :
+ resp->blocks[resp->freq_block_id].sensor;
+ break;
+ case power:
+ sensor = (resp->power_block_id == -1) ? NULL :
+ resp->blocks[resp->power_block_id].power;
+ break;
+ case caps:
+ sensor = (resp->caps_block_id == -1) ? NULL :
+ resp->blocks[resp->caps_block_id].caps;
+ break;
+ default:
+ sensor = NULL;
+ break;
+ }
+
+ return sensor;
+}
+
+static int occ_renew_sensor(struct occ_response *resp, uint8_t sensor_length,
+ uint8_t num_of_sensors, enum sensor_t t, int block)
+{
+ void *sensor;
+ int ret;
+
+ sensor = occ_get_sensor_by_type(resp, t);
+
+ /* empty sensor block, release older sensor data */
+ if (num_of_sensors == 0 || sensor_length == 0) {
+ kfree(sensor);
+ return -1;
+ }
+
+ switch (t) {
+ case temp:
+ if (!sensor || num_of_sensors !=
+ resp->blocks[resp->temp_block_id].num_of_sensors) {
+ kfree(sensor);
+ resp->blocks[block].sensor =
+ kcalloc(num_of_sensors,
+ sizeof(struct occ_sensor), GFP_KERNEL);
+ if (!resp->blocks[block].sensor) {
+ ret = -ENOMEM;
+ goto err;
+ }
+ }
+ break;
+ case freq:
+ if (!sensor || num_of_sensors !=
+ resp->blocks[resp->freq_block_id].num_of_sensors) {
+ kfree(sensor);
+ resp->blocks[block].sensor =
+ kcalloc(num_of_sensors,
+ sizeof(struct occ_sensor), GFP_KERNEL);
+ if (!resp->blocks[block].sensor) {
+ ret = -ENOMEM;
+ goto err;
+ }
+ }
+ break;
+ case power:
+ if (!sensor || num_of_sensors !=
+ resp->blocks[resp->power_block_id].num_of_sensors) {
+ kfree(sensor);
+ resp->blocks[block].power =
+ kcalloc(num_of_sensors,
+ sizeof(struct power_sensor), GFP_KERNEL);
+ if (!resp->blocks[block].power) {
+ ret = -ENOMEM;
+ goto err;
+ }
+ }
+ break;
+ case caps:
+ if (!sensor || num_of_sensors !=
+ resp->blocks[resp->caps_block_id].num_of_sensors) {
+ kfree(sensor);
+ resp->blocks[block].caps =
+ kcalloc(num_of_sensors,
+ sizeof(struct caps_sensor), GFP_KERNEL);
+ if (!resp->blocks[block].caps) {
+ ret = -ENOMEM;
+ goto err;
+ }
+ }
+ break;
+ default:
+ sensor = NULL;
+ break;
+ }
+
+ return 0;
+err:
+ deinit_occ_resp_buf(resp);
+ return ret;
+}
+
+/* refer to OCC interface document for Poll Return Packet format
+ * https://github.com/open-power/docs/blob/master/occ/OCC_OpenPwr_FW_Interfaces.pdf
+ */
+#define RESP_DATA_LENGTH 3
+#define RESP_HEADER_OFFSET 5
+#define SENSOR_STR_OFFSET 37
+#define SENSOR_BLOCK_NUM_OFFSET 43
+#define SENSOR_BLOCK_OFFSET 45
+
+static inline uint16_t get_occdata_length(uint8_t *data)
+{
+ return be16_to_cpup(&data[RESP_DATA_LENGTH]);
+}
+
+static int parse_occ_response(struct i2c_client *client,
+ uint8_t *data, struct occ_response *resp)
+{
+ int b;
+ int s;
+ int ret;
+ int dnum = SENSOR_BLOCK_OFFSET;
+ struct occ_sensor *f_sensor;
+ struct occ_sensor *t_sensor;
+ struct power_sensor *p_sensor;
+ struct caps_sensor *c_sensor;
+ uint8_t sensor_block_num;
+ uint8_t sensor_type[4];
+ uint8_t sensor_format;
+ uint8_t sensor_length;
+ uint8_t num_of_sensors;
+
+ /* check if the data is valid */
+ if (strncmp(&data[SENSOR_STR_OFFSET], "SENSOR", 6) != 0) {
+ dev_err(&client->dev,
+ "ERROR: no SENSOR String in response\n");
+ ret = -1;
+ goto err;
+ }
+
+ sensor_block_num = data[SENSOR_BLOCK_NUM_OFFSET];
+ if (sensor_block_num == 0) {
+ dev_err(&client->dev, "ERROR: SENSOR block num is 0\n");
+ ret = -1;
+ goto err;
+ }
+
+ /* if sensor block has changed, re-malloc */
+ if (sensor_block_num != resp->header.sensor_block_num) {
+ deinit_occ_resp_buf(resp);
+ resp->blocks = kcalloc(sensor_block_num,
+ sizeof(struct sensor_data_block), GFP_KERNEL);
+ if (!resp->blocks)
+ return -ENOMEM;
+ }
+
+ memcpy(&resp->header, &data[RESP_HEADER_OFFSET], sizeof(resp->header));
+ resp->header.error_log_addr_start =
+ be32_to_cpu(resp->header.error_log_addr_start);
+ resp->header.error_log_length =
+ be16_to_cpu(resp->header.error_log_length);
+
+ dev_dbg(&client->dev, "Reading %d sensor blocks\n",
+ resp->header.sensor_block_num);
+ for (b = 0; b < sensor_block_num; b++) {
+ /* 8-byte sensor block head */
+ strncpy(sensor_type, &data[dnum], 4);
+ sensor_format = data[dnum+5];
+ sensor_length = data[dnum+6];
+ num_of_sensors = data[dnum+7];
+ dnum = dnum + 8;
+
+ dev_dbg(&client->dev,
+ "sensor block[%d]: type: %s, num_of_sensors: %d\n",
+ b, sensor_type, num_of_sensors);
+
+ if (strncmp(sensor_type, "FREQ", 4) == 0) {
+ ret = occ_renew_sensor(resp, sensor_length,
+ num_of_sensors, freq, b);
+ if (ret)
+ continue;
+
+ resp->freq_block_id = b;
+ for (s = 0; s < num_of_sensors; s++) {
+ f_sensor = &resp->blocks[b].sensor[s];
+ f_sensor->sensor_id = be16_to_cpup(&data[dnum]);
+ f_sensor->value = be16_to_cpup(&data[dnum+2]);
+ dev_dbg(&client->dev,
+ "sensor[%d]-[%d]: id: %u, value: %u\n",
+ b, s, f_sensor->sensor_id,
+ f_sensor->value);
+ dnum = dnum + sensor_length;
+ }
+ } else if (strncmp(sensor_type, "TEMP", 4) == 0) {
+ ret = occ_renew_sensor(resp, sensor_length,
+ num_of_sensors, temp, b);
+ if (ret)
+ continue;
+
+ resp->temp_block_id = b;
+ for (s = 0; s < num_of_sensors; s++) {
+ t_sensor = &resp->blocks[b].sensor[s];
+ t_sensor->sensor_id = be16_to_cpup(&data[dnum]);
+ t_sensor->value = be16_to_cpup(&data[dnum+2]);
+ dev_dbg(&client->dev,
+ "sensor[%d]-[%d]: id: %u, value: %u\n",
+ b, s, t_sensor->sensor_id,
+ t_sensor->value);
+ dnum = dnum + sensor_length;
+ }
+ } else if (strncmp(sensor_type, "POWR", 4) == 0) {
+ ret = occ_renew_sensor(resp, sensor_length,
+ num_of_sensors, power, b);
+ if (ret)
+ continue;
+
+ resp->power_block_id = b;
+ for (s = 0; s < num_of_sensors; s++) {
+ p_sensor = &resp->blocks[b].power[s];
+ p_sensor->sensor_id = be16_to_cpup(&data[dnum]);
+ p_sensor->update_tag =
+ be32_to_cpup(&data[dnum+2]);
+ p_sensor->accumulator =
+ be32_to_cpup(&data[dnum+6]);
+ p_sensor->value = be16_to_cpup(&data[dnum+10]);
+
+ dev_dbg(&client->dev,
+ "sensor[%d]-[%d]: id: %u, value: %u\n",
+ b, s, p_sensor->sensor_id,
+ p_sensor->value);
+
+ dnum = dnum + sensor_length;
+ }
+ } else if (strncmp(sensor_type, "CAPS", 4) == 0) {
+ ret = occ_renew_sensor(resp, sensor_length,
+ num_of_sensors, caps, b);
+ if (ret)
+ continue;
+
+ resp->caps_block_id = b;
+ for (s = 0; s < num_of_sensors; s++) {
+ c_sensor = &resp->blocks[b].caps[s];
+ c_sensor->curr_powercap =
+ be16_to_cpup(&data[dnum]);
+ c_sensor->curr_powerreading =
+ be16_to_cpup(&data[dnum+2]);
+ c_sensor->norm_powercap =
+ be16_to_cpup(&data[dnum+4]);
+ c_sensor->max_powercap =
+ be16_to_cpup(&data[dnum+6]);
+ c_sensor->min_powercap =
+ be16_to_cpup(&data[dnum+8]);
+ c_sensor->user_powerlimit =
+ be16_to_cpup(&data[dnum+10]);
+
+ dnum = dnum + sensor_length;
+ dev_dbg(&client->dev, "CAPS sensor #%d:\n", s);
+ dev_dbg(&client->dev, "curr_powercap is %x\n",
+ c_sensor->curr_powercap);
+ dev_dbg(&client->dev,
+ "curr_powerreading is %x\n",
+ c_sensor->curr_powerreading);
+ dev_dbg(&client->dev, "norm_powercap is %x\n",
+ c_sensor->norm_powercap);
+ dev_dbg(&client->dev, "max_powercap is %x\n",
+ c_sensor->max_powercap);
+ dev_dbg(&client->dev, "min_powercap is %x\n",
+ c_sensor->min_powercap);
+ dev_dbg(&client->dev, "user_powerlimit is %x\n",
+ c_sensor->user_powerlimit);
+ }
+
+ } else {
+ dev_err(&client->dev,
+ "ERROR: sensor type %s not supported\n",
+ resp->blocks[b].sensor_type);
+ ret = -1;
+ goto err;
+ }
+
+ strncpy(resp->blocks[b].sensor_type, sensor_type, 4);
+ resp->blocks[b].sensor_format = sensor_format;
+ resp->blocks[b].sensor_length = sensor_length;
+ resp->blocks[b].num_of_sensors = num_of_sensors;
+ }
+
+ return 0;
+err:
+ deinit_occ_resp_buf(resp);
+ return ret;
+}
+
+static int occ_get_all(struct i2c_client *client, struct occ_response *occ_resp)
+{
+ uint8_t occ_data[OCC_DATA_MAX];
+ uint16_t num_bytes;
+ int i;
+ int ret;
+
+ /* Init OCB */
+ occ_putscom(client, OCB_STATUS_CONTROL_OR, 0x08000000, 0x00000000);
+ occ_putscom(client, OCB_STATUS_CONTROL_AND, 0xFBFFFFFF, 0xFFFFFFFF);
+
+ /* Send poll command to OCC */
+ occ_putscom(client, OCB_ADDRESS, OCC_COMMAND_ADDR, 0x00000000);
+ occ_putscom(client, OCB_ADDRESS, OCC_COMMAND_ADDR, 0x00000000);
+ occ_putscom(client, OCB_DATA, 0x00000001, 0x10001100);
+
+ /* Trigger ATTN */
+ occ_putscom(client, ATTN_DATA, 0x01010000, 0x00000000);
+
+ /* Get response data */
+ occ_putscom(client, OCB_ADDRESS, OCC_RESPONSE_ADDR, 0x00000000);
+ occ_getscomb(client, OCB_DATA, occ_data, 0);
+
+ num_bytes = get_occdata_length(occ_data);
+
+ dev_dbg(&client->dev, "OCC data length: %d\n", num_bytes);
+
+ if (num_bytes > OCC_DATA_MAX) {
+ dev_err(&client->dev, "ERROR: OCC data length must be < 4KB\n");
+ return -1;
+ }
+
+ if (num_bytes <= 0) {
+ dev_err(&client->dev, "ERROR: OCC data length is zero\n");
+ return -1;
+ }
+
+ for (i = 8; i < num_bytes + 8; i = i + 8)
+ occ_getscomb(client, OCB_DATA, occ_data, i);
+
+ ret = parse_occ_response(client, occ_data, occ_resp);
+
+ return ret;
+}
+
+
+static int occ_update_device(struct device *dev)
+{
+ struct occ_drv_data *data = dev_get_drvdata(dev);
+ struct i2c_client *client = data->client;
+ int ret = 0;
+
+ mutex_lock(&data->update_lock);
+
+ if (time_after(jiffies, data->last_updated + data->update_interval)
+ || !data->valid) {
+ data->valid = 1;
+ ret = occ_get_all(client, &data->occ_resp);
+ if (ret)
+ data->valid = 0;
+ data->last_updated = jiffies;
+ }
+ mutex_unlock(&data->update_lock);
+
+ return ret;
+}
+
+
+static void *occ_get_sensor(struct device *hwmon_dev, enum sensor_t t)
+{
+ struct device *dev = hwmon_dev->parent;
+ struct occ_drv_data *data = dev_get_drvdata(dev);
+ int ret;
+
+ ret = occ_update_device(dev);
+ if (ret != 0) {
+ dev_err(dev, "ERROR: cannot get occ sensor data: %d\n", ret);
+ return NULL;
+ }
+
+ return occ_get_sensor_by_type(&data->occ_resp, t);
+}
+
+/* sysfs attributes for hwmon */
+static ssize_t show_occ_temp_input(struct device *hwmon_dev,
+ struct device_attribute *da, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
+ int n = attr->index;
+ struct occ_sensor *sensor;
+ int val;
+
+ sensor = occ_get_sensor(hwmon_dev, temp);
+ if (!sensor)
+ val = -1;
+ else
+ /* in millidegree Celsius */
+ val = sensor[n].value * 1000;
+
+ return snprintf(buf, PAGE_SIZE - 1, "%d\n", val);
+}
+
+static ssize_t show_occ_temp_label(struct device *hwmon_dev,
+ struct device_attribute *da, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
+ int n = attr->index;
+ struct occ_sensor *sensor;
+ int val;
+
+ sensor = occ_get_sensor(hwmon_dev, temp);
+ if (!sensor)
+ val = -1;
+ else
+ val = sensor[n].sensor_id;
+
+ return snprintf(buf, PAGE_SIZE - 1, "%d\n", val);
+}
+
+static ssize_t show_occ_power_label(struct device *hwmon_dev,
+ struct device_attribute *da, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
+ int n = attr->index;
+ struct power_sensor *sensor;
+ int val;
+
+ sensor = occ_get_sensor(hwmon_dev, power);
+ if (!sensor)
+ val = -1;
+ else
+ val = sensor[n].sensor_id;
+
+ return snprintf(buf, PAGE_SIZE - 1, "%d\n", val);
+}
+
+
+static ssize_t show_occ_power_input(struct device *hwmon_dev,
+ struct device_attribute *da, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
+ int n = attr->index;
+ struct power_sensor *sensor;
+ int val;
+
+ sensor = occ_get_sensor(hwmon_dev, power);
+ if (!sensor)
+ val = -1;
+ else
+ val = sensor[n].value;
+
+ return snprintf(buf, PAGE_SIZE - 1, "%d\n", val);
+
+}
+
+
+static ssize_t show_occ_freq_label(struct device *hwmon_dev,
+ struct device_attribute *da, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
+ int n = attr->index;
+ struct occ_sensor *sensor;
+ int val;
+
+ sensor = occ_get_sensor(hwmon_dev, freq);
+ if (!sensor)
+ val = -1;
+ else
+ val = sensor[n].sensor_id;
+
+ return snprintf(buf, PAGE_SIZE - 1, "%d\n", val);
+}
+
+
+static ssize_t show_occ_freq_input(struct device *hwmon_dev,
+ struct device_attribute *da, char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
+ int n = attr->index;
+ struct occ_sensor *sensor;
+ int val;
+
+ sensor = occ_get_sensor(hwmon_dev, freq);
+ if (!sensor)
+ val = -1;
+ else
+ val = sensor[n].value;
+
+ return snprintf(buf, PAGE_SIZE - 1, "%d\n", val);
+}
+
+static ssize_t show_occ_caps(struct device *hwmon_dev,
+ struct device_attribute *da, char *buf)
+{
+ struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(da);
+ int nr = attr->nr;
+ int n = attr->index;
+ struct caps_sensor *sensor;
+ int val;
+
+ sensor = occ_get_sensor(hwmon_dev, caps);
+ if (!sensor) {
+ val = -1;
+ return snprintf(buf, PAGE_SIZE - 1, "%d\n", val);
+ }
+
+ switch (nr) {
+ case 0:
+ val = sensor[n].curr_powercap;
+ break;
+ case 1:
+ val = sensor[n].curr_powerreading;
+ break;
+ case 2:
+ val = sensor[n].norm_powercap;
+ break;
+ case 3:
+ val = sensor[n].max_powercap;
+ break;
+ case 4:
+ val = sensor[n].min_powercap;
+ break;
+ case 5:
+ val = sensor[n].user_powerlimit;
+ break;
+ default:
+ val = -1;
+ }
+
+ return snprintf(buf, PAGE_SIZE - 1, "%d\n", val);
+}
+
+static struct sensor_device_attribute temp_input[] = {
+ SENSOR_ATTR(temp1_input, S_IRUGO, show_occ_temp_input, NULL, 0),
+ SENSOR_ATTR(temp2_input, S_IRUGO, show_occ_temp_input, NULL, 1),
+ SENSOR_ATTR(temp3_input, S_IRUGO, show_occ_temp_input, NULL, 2),
+ SENSOR_ATTR(temp4_input, S_IRUGO, show_occ_temp_input, NULL, 3),
+ SENSOR_ATTR(temp5_input, S_IRUGO, show_occ_temp_input, NULL, 4),
+ SENSOR_ATTR(temp6_input, S_IRUGO, show_occ_temp_input, NULL, 5),
+ SENSOR_ATTR(temp7_input, S_IRUGO, show_occ_temp_input, NULL, 6),
+ SENSOR_ATTR(temp8_input, S_IRUGO, show_occ_temp_input, NULL, 7),
+ SENSOR_ATTR(temp9_input, S_IRUGO, show_occ_temp_input, NULL, 8),
+ SENSOR_ATTR(temp10_input, S_IRUGO, show_occ_temp_input, NULL, 9),
+ SENSOR_ATTR(temp11_input, S_IRUGO, show_occ_temp_input, NULL, 10),
+ SENSOR_ATTR(temp12_input, S_IRUGO, show_occ_temp_input, NULL, 11),
+ SENSOR_ATTR(temp13_input, S_IRUGO, show_occ_temp_input, NULL, 12),
+ SENSOR_ATTR(temp14_input, S_IRUGO, show_occ_temp_input, NULL, 13),
+ SENSOR_ATTR(temp15_input, S_IRUGO, show_occ_temp_input, NULL, 14),
+ SENSOR_ATTR(temp16_input, S_IRUGO, show_occ_temp_input, NULL, 15),
+ SENSOR_ATTR(temp17_input, S_IRUGO, show_occ_temp_input, NULL, 16),
+ SENSOR_ATTR(temp18_input, S_IRUGO, show_occ_temp_input, NULL, 17),
+ SENSOR_ATTR(temp19_input, S_IRUGO, show_occ_temp_input, NULL, 18),
+ SENSOR_ATTR(temp20_input, S_IRUGO, show_occ_temp_input, NULL, 19),
+ SENSOR_ATTR(temp21_input, S_IRUGO, show_occ_temp_input, NULL, 20),
+ SENSOR_ATTR(temp22_input, S_IRUGO, show_occ_temp_input, NULL, 21),
+};
+
+static struct sensor_device_attribute temp_label[] = {
+ SENSOR_ATTR(temp1_label, S_IRUGO, show_occ_temp_label, NULL, 0),
+ SENSOR_ATTR(temp2_label, S_IRUGO, show_occ_temp_label, NULL, 1),
+ SENSOR_ATTR(temp3_label, S_IRUGO, show_occ_temp_label, NULL, 2),
+ SENSOR_ATTR(temp4_label, S_IRUGO, show_occ_temp_label, NULL, 3),
+ SENSOR_ATTR(temp5_label, S_IRUGO, show_occ_temp_label, NULL, 4),
+ SENSOR_ATTR(temp6_label, S_IRUGO, show_occ_temp_label, NULL, 5),
+ SENSOR_ATTR(temp7_label, S_IRUGO, show_occ_temp_label, NULL, 6),
+ SENSOR_ATTR(temp8_label, S_IRUGO, show_occ_temp_label, NULL, 7),
+ SENSOR_ATTR(temp9_label, S_IRUGO, show_occ_temp_label, NULL, 8),
+ SENSOR_ATTR(temp10_label, S_IRUGO, show_occ_temp_label, NULL, 9),
+ SENSOR_ATTR(temp11_label, S_IRUGO, show_occ_temp_label, NULL, 10),
+ SENSOR_ATTR(temp12_label, S_IRUGO, show_occ_temp_label, NULL, 11),
+ SENSOR_ATTR(temp13_label, S_IRUGO, show_occ_temp_label, NULL, 12),
+ SENSOR_ATTR(temp14_label, S_IRUGO, show_occ_temp_label, NULL, 13),
+ SENSOR_ATTR(temp15_label, S_IRUGO, show_occ_temp_label, NULL, 14),
+ SENSOR_ATTR(temp16_label, S_IRUGO, show_occ_temp_label, NULL, 15),
+ SENSOR_ATTR(temp17_label, S_IRUGO, show_occ_temp_label, NULL, 16),
+ SENSOR_ATTR(temp18_label, S_IRUGO, show_occ_temp_label, NULL, 17),
+ SENSOR_ATTR(temp19_label, S_IRUGO, show_occ_temp_label, NULL, 18),
+ SENSOR_ATTR(temp20_label, S_IRUGO, show_occ_temp_label, NULL, 19),
+ SENSOR_ATTR(temp21_label, S_IRUGO, show_occ_temp_label, NULL, 20),
+ SENSOR_ATTR(temp22_label, S_IRUGO, show_occ_temp_label, NULL, 21),
+
+};
+
+#define TEMP_UNIT_ATTRS(X) \
+{ &temp_input[X].dev_attr.attr, \
+ &temp_label[X].dev_attr.attr, \
+ NULL \
+}
+
+/* 10-core CPU, occ has 22 temp sensors, more socket, more sensors */
+static struct attribute *occ_temp_attr[][3] = {
+ TEMP_UNIT_ATTRS(0),
+ TEMP_UNIT_ATTRS(1),
+ TEMP_UNIT_ATTRS(2),
+ TEMP_UNIT_ATTRS(3),
+ TEMP_UNIT_ATTRS(4),
+ TEMP_UNIT_ATTRS(5),
+ TEMP_UNIT_ATTRS(6),
+ TEMP_UNIT_ATTRS(7),
+ TEMP_UNIT_ATTRS(8),
+ TEMP_UNIT_ATTRS(9),
+ TEMP_UNIT_ATTRS(10),
+ TEMP_UNIT_ATTRS(11),
+ TEMP_UNIT_ATTRS(12),
+ TEMP_UNIT_ATTRS(13),
+ TEMP_UNIT_ATTRS(14),
+ TEMP_UNIT_ATTRS(15),
+ TEMP_UNIT_ATTRS(16),
+ TEMP_UNIT_ATTRS(17),
+ TEMP_UNIT_ATTRS(18),
+ TEMP_UNIT_ATTRS(19),
+ TEMP_UNIT_ATTRS(20),
+ TEMP_UNIT_ATTRS(21),
+};
+
+static const struct attribute_group occ_temp_attr_group[] = {
+ { .attrs = occ_temp_attr[0] },
+ { .attrs = occ_temp_attr[1] },
+ { .attrs = occ_temp_attr[2] },
+ { .attrs = occ_temp_attr[3] },
+ { .attrs = occ_temp_attr[4] },
+ { .attrs = occ_temp_attr[5] },
+ { .attrs = occ_temp_attr[6] },
+ { .attrs = occ_temp_attr[7] },
+ { .attrs = occ_temp_attr[8] },
+ { .attrs = occ_temp_attr[9] },
+ { .attrs = occ_temp_attr[10] },
+ { .attrs = occ_temp_attr[11] },
+ { .attrs = occ_temp_attr[12] },
+ { .attrs = occ_temp_attr[13] },
+ { .attrs = occ_temp_attr[14] },
+ { .attrs = occ_temp_attr[15] },
+ { .attrs = occ_temp_attr[16] },
+ { .attrs = occ_temp_attr[17] },
+ { .attrs = occ_temp_attr[18] },
+ { .attrs = occ_temp_attr[19] },
+ { .attrs = occ_temp_attr[20] },
+ { .attrs = occ_temp_attr[21] },
+};
+
+
+static struct sensor_device_attribute freq_input[] = {
+ SENSOR_ATTR(freq1_input, S_IRUGO, show_occ_freq_input, NULL, 0),
+ SENSOR_ATTR(freq2_input, S_IRUGO, show_occ_freq_input, NULL, 1),
+ SENSOR_ATTR(freq3_input, S_IRUGO, show_occ_freq_input, NULL, 2),
+ SENSOR_ATTR(freq4_input, S_IRUGO, show_occ_freq_input, NULL, 3),
+ SENSOR_ATTR(freq5_input, S_IRUGO, show_occ_freq_input, NULL, 4),
+ SENSOR_ATTR(freq6_input, S_IRUGO, show_occ_freq_input, NULL, 5),
+ SENSOR_ATTR(freq7_input, S_IRUGO, show_occ_freq_input, NULL, 6),
+ SENSOR_ATTR(freq8_input, S_IRUGO, show_occ_freq_input, NULL, 7),
+ SENSOR_ATTR(freq9_input, S_IRUGO, show_occ_freq_input, NULL, 8),
+ SENSOR_ATTR(freq10_input, S_IRUGO, show_occ_freq_input, NULL, 9),
+};
+
+static struct sensor_device_attribute freq_label[] = {
+ SENSOR_ATTR(freq1_label, S_IRUGO, show_occ_freq_label, NULL, 0),
+ SENSOR_ATTR(freq2_label, S_IRUGO, show_occ_freq_label, NULL, 1),
+ SENSOR_ATTR(freq3_label, S_IRUGO, show_occ_freq_label, NULL, 2),
+ SENSOR_ATTR(freq4_label, S_IRUGO, show_occ_freq_label, NULL, 3),
+ SENSOR_ATTR(freq5_label, S_IRUGO, show_occ_freq_label, NULL, 4),
+ SENSOR_ATTR(freq6_label, S_IRUGO, show_occ_freq_label, NULL, 5),
+ SENSOR_ATTR(freq7_label, S_IRUGO, show_occ_freq_label, NULL, 6),
+ SENSOR_ATTR(freq8_label, S_IRUGO, show_occ_freq_label, NULL, 7),
+ SENSOR_ATTR(freq9_label, S_IRUGO, show_occ_freq_label, NULL, 8),
+ SENSOR_ATTR(freq10_label, S_IRUGO, show_occ_freq_label, NULL, 9),
+
+};
+
+#define FREQ_UNIT_ATTRS(X) \
+{ &freq_input[X].dev_attr.attr, \
+ &freq_label[X].dev_attr.attr, \
+ NULL \
+}
+
+/* 10-core CPU, occ has 22 freq sensors, more socket, more sensors */
+static struct attribute *occ_freq_attr[][3] = {
+ FREQ_UNIT_ATTRS(0),
+ FREQ_UNIT_ATTRS(1),
+ FREQ_UNIT_ATTRS(2),
+ FREQ_UNIT_ATTRS(3),
+ FREQ_UNIT_ATTRS(4),
+ FREQ_UNIT_ATTRS(5),
+ FREQ_UNIT_ATTRS(6),
+ FREQ_UNIT_ATTRS(7),
+ FREQ_UNIT_ATTRS(8),
+ FREQ_UNIT_ATTRS(9),
+};
+
+static const struct attribute_group occ_freq_attr_group[] = {
+ { .attrs = occ_freq_attr[0] },
+ { .attrs = occ_freq_attr[1] },
+ { .attrs = occ_freq_attr[2] },
+ { .attrs = occ_freq_attr[3] },
+ { .attrs = occ_freq_attr[4] },
+ { .attrs = occ_freq_attr[5] },
+ { .attrs = occ_freq_attr[6] },
+ { .attrs = occ_freq_attr[7] },
+ { .attrs = occ_freq_attr[8] },
+ { .attrs = occ_freq_attr[9] },
+};
+
+static struct sensor_device_attribute_2 caps_curr_powercap[] = {
+ SENSOR_ATTR_2(caps_curr_powercap, S_IRUGO, show_occ_caps, NULL, 0, 0),
+};
+static struct sensor_device_attribute_2 caps_curr_powerreading[] = {
+ SENSOR_ATTR_2(caps_curr_powerreading, S_IRUGO,
+ show_occ_caps, NULL, 1, 0),
+};
+static struct sensor_device_attribute_2 caps_norm_powercap[] = {
+ SENSOR_ATTR_2(caps_norm_powercap, S_IRUGO, show_occ_caps,
+ NULL, 2, 0),
+};
+static struct sensor_device_attribute_2 caps_max_powercap[] = {
+ SENSOR_ATTR_2(caps_max_powercap, S_IRUGO, show_occ_caps, NULL, 3, 0),
+};
+static struct sensor_device_attribute_2 caps_min_powercap[] = {
+ SENSOR_ATTR_2(caps_min_powercap, S_IRUGO, show_occ_caps, NULL, 4, 0),
+};
+static struct sensor_device_attribute_2 caps_user_powerlimit[] = {
+ SENSOR_ATTR_2(caps_user_powerlimit, S_IRUGO, show_occ_caps, NULL, 5, 0),
+};
+#define CAPS_UNIT_ATTRS(X) \
+{ &caps_curr_powercap[X].dev_attr.attr, \
+ &caps_curr_powerreading[X].dev_attr.attr, \
+ &caps_norm_powercap[X].dev_attr.attr, \
+ &caps_max_powercap[X].dev_attr.attr, \
+ &caps_min_powercap[X].dev_attr.attr, \
+ &caps_user_powerlimit[X].dev_attr.attr, \
+ NULL \
+}
+
+/* 10-core CPU, occ has 1 caps sensors */
+static struct attribute *occ_caps_attr[][7] = {
+ CAPS_UNIT_ATTRS(0),
+};
+static const struct attribute_group occ_caps_attr_group[] = {
+ { .attrs = occ_caps_attr[0] },
+};
+
+static struct sensor_device_attribute power_input[] = {
+ SENSOR_ATTR(power1_input, S_IRUGO, show_occ_power_input, NULL, 0),
+ SENSOR_ATTR(power2_input, S_IRUGO, show_occ_power_input, NULL, 1),
+ SENSOR_ATTR(power3_input, S_IRUGO, show_occ_power_input, NULL, 2),
+ SENSOR_ATTR(power4_input, S_IRUGO, show_occ_power_input, NULL, 3),
+ SENSOR_ATTR(power5_input, S_IRUGO, show_occ_power_input, NULL, 4),
+ SENSOR_ATTR(power6_input, S_IRUGO, show_occ_power_input, NULL, 5),
+ SENSOR_ATTR(power7_input, S_IRUGO, show_occ_power_input, NULL, 6),
+ SENSOR_ATTR(power8_input, S_IRUGO, show_occ_power_input, NULL, 7),
+ SENSOR_ATTR(power9_input, S_IRUGO, show_occ_power_input, NULL, 8),
+ SENSOR_ATTR(power10_input, S_IRUGO, show_occ_power_input, NULL, 9),
+ SENSOR_ATTR(power11_input, S_IRUGO, show_occ_power_input, NULL, 10),
+};
+
+static struct sensor_device_attribute power_label[] = {
+ SENSOR_ATTR(power1_label, S_IRUGO, show_occ_power_label, NULL, 0),
+ SENSOR_ATTR(power2_label, S_IRUGO, show_occ_power_label, NULL, 1),
+ SENSOR_ATTR(power3_label, S_IRUGO, show_occ_power_label, NULL, 2),
+ SENSOR_ATTR(power4_label, S_IRUGO, show_occ_power_label, NULL, 3),
+ SENSOR_ATTR(power5_label, S_IRUGO, show_occ_power_label, NULL, 4),
+ SENSOR_ATTR(power6_label, S_IRUGO, show_occ_power_label, NULL, 5),
+ SENSOR_ATTR(power7_label, S_IRUGO, show_occ_power_label, NULL, 6),
+ SENSOR_ATTR(power8_label, S_IRUGO, show_occ_power_label, NULL, 7),
+ SENSOR_ATTR(power9_label, S_IRUGO, show_occ_power_label, NULL, 8),
+ SENSOR_ATTR(power10_label, S_IRUGO, show_occ_power_label, NULL, 9),
+ SENSOR_ATTR(power11_label, S_IRUGO, show_occ_power_label, NULL, 10),
+};
+
+#define POWER_UNIT_ATTRS(X) \
+{ &power_input[X].dev_attr.attr, \
+ &power_label[X].dev_attr.attr, \
+ NULL \
+}
+
+/* 10-core CPU, occ has 11 power sensors, more socket, more sensors */
+static struct attribute *occ_power_attr[][3] = {
+ POWER_UNIT_ATTRS(0),
+ POWER_UNIT_ATTRS(1),
+ POWER_UNIT_ATTRS(2),
+ POWER_UNIT_ATTRS(3),
+ POWER_UNIT_ATTRS(4),
+ POWER_UNIT_ATTRS(5),
+ POWER_UNIT_ATTRS(6),
+ POWER_UNIT_ATTRS(7),
+ POWER_UNIT_ATTRS(8),
+ POWER_UNIT_ATTRS(9),
+ POWER_UNIT_ATTRS(10),
+};
+
+static const struct attribute_group occ_power_attr_group[] = {
+ { .attrs = occ_power_attr[0] },
+ { .attrs = occ_power_attr[1] },
+ { .attrs = occ_power_attr[2] },
+ { .attrs = occ_power_attr[3] },
+ { .attrs = occ_power_attr[4] },
+ { .attrs = occ_power_attr[5] },
+ { .attrs = occ_power_attr[6] },
+ { .attrs = occ_power_attr[7] },
+ { .attrs = occ_power_attr[8] },
+ { .attrs = occ_power_attr[9] },
+ { .attrs = occ_power_attr[10] },
+};
+
+static ssize_t show_update_interval(struct device *hwmon_dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct device *dev = hwmon_dev->parent;
+ struct occ_drv_data *data = dev_get_drvdata(dev);
+
+ return snprintf(buf, PAGE_SIZE - 1, "%u\n",
+ jiffies_to_msecs(data->update_interval));
+}
+
+static ssize_t set_update_interval(struct device *hwmon_dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct device *dev = hwmon_dev->parent;
+ struct occ_drv_data *data = dev_get_drvdata(dev);
+ unsigned long val;
+ int err;
+
+ err = kstrtoul(buf, 10, &val);
+ if (err)
+ return err;
+
+ data->update_interval = msecs_to_jiffies(val);
+ return count;
+}
+static DEVICE_ATTR(update_interval, S_IWUSR | S_IRUGO,
+ show_update_interval, set_update_interval);
+
+static ssize_t show_name(struct device *hwmon_dev,
+ struct device_attribute *attr, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE - 1, "%s\n", OCC_I2C_NAME);
+}
+static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
+
+
+static void occ_remove_sysfs_files(struct device *dev)
+{
+ int i = 0;
+
+ if (!dev)
+ return;
+
+ device_remove_file(dev, &dev_attr_update_interval);
+ device_remove_file(dev, &dev_attr_name);
+
+ for (i = 0; i < ARRAY_SIZE(occ_temp_attr_group); i++)
+ sysfs_remove_group(&dev->kobj, &occ_temp_attr_group[i]);
+
+ for (i = 0; i < ARRAY_SIZE(occ_freq_attr_group); i++)
+ sysfs_remove_group(&dev->kobj, &occ_freq_attr_group[i]);
+
+ for (i = 0; i < ARRAY_SIZE(occ_power_attr_group); i++)
+ sysfs_remove_group(&dev->kobj, &occ_power_attr_group[i]);
+
+ for (i = 0; i < ARRAY_SIZE(occ_caps_attr_group); i++)
+ sysfs_remove_group(&dev->kobj, &occ_caps_attr_group[i]);
+}
+
+static int occ_create_hwmon_attribute(struct device *dev)
+{
+ /* The sensor number varies for different
+ * platform depending on core number. We'd better
+ * create them dynamically
+ */
+ struct occ_drv_data *drv_data = dev_get_drvdata(dev);
+ int i = 0;
+ int num_of_sensors = 0;
+ int ret = 0;
+ struct occ_response *rsp = NULL;
+
+ /* get sensor number from occ. */
+ rsp = &drv_data->occ_resp;
+
+ rsp->freq_block_id = -1;
+ rsp->temp_block_id = -1;
+ rsp->power_block_id = -1;
+ rsp->caps_block_id = -1;
+
+ ret = occ_update_device(dev);
+ if (ret != 0) {
+ dev_err(dev, "ERROR: cannot get occ sensor data: %d\n", ret);
+ return ret;
+ }
+
+ if (!rsp->blocks)
+ return -1;
+
+ ret = device_create_file(drv_data->hwmon_dev,
+ &dev_attr_name);
+ if (ret)
+ goto error;
+
+ ret = device_create_file(drv_data->hwmon_dev,
+ &dev_attr_update_interval);
+ if (ret)
+ goto error;
+
+ /* temp sensors */
+ if (rsp->temp_block_id >= 0) {
+ num_of_sensors =
+ rsp->blocks[rsp->temp_block_id].num_of_sensors;
+ for (i = 0; i < num_of_sensors; i++) {
+ ret = sysfs_create_group(&drv_data->hwmon_dev->kobj,
+ &occ_temp_attr_group[i]);
+ if (ret) {
+ dev_err(dev, "error create temp sysfs entry\n");
+ goto error;
+ }
+ }
+ }
+
+ /* freq sensors */
+ if (rsp->freq_block_id >= 0) {
+ num_of_sensors =
+ rsp->blocks[rsp->freq_block_id].num_of_sensors;
+ for (i = 0; i < num_of_sensors; i++) {
+ ret = sysfs_create_group(&drv_data->hwmon_dev->kobj,
+ &occ_freq_attr_group[i]);
+ if (ret) {
+ dev_err(dev, "error create freq sysfs entry\n");
+ goto error;
+ }
+ }
+ }
+
+ /* power sensors */
+ if (rsp->power_block_id >= 0) {
+ num_of_sensors =
+ rsp->blocks[rsp->power_block_id].num_of_sensors;
+ for (i = 0; i < num_of_sensors; i++) {
+ ret = sysfs_create_group(&drv_data->hwmon_dev->kobj,
+ &occ_power_attr_group[i]);
+ if (ret) {
+ dev_err(dev, "error create power sysfs entry\n");
+ goto error;
+ }
+ }
+ }
+
+ /* caps sensors */
+ if (rsp->caps_block_id >= 0) {
+ num_of_sensors =
+ rsp->blocks[rsp->caps_block_id].num_of_sensors;
+ for (i = 0; i < num_of_sensors; i++) {
+ ret = sysfs_create_group(&drv_data->hwmon_dev->kobj,
+ &occ_caps_attr_group[i]);
+ if (ret) {
+ dev_err(dev, "error create caps sysfs entry\n");
+ goto error;
+ }
+ }
+ }
+
+ return 0;
+error:
+ occ_remove_sysfs_files(drv_data->hwmon_dev);
+ return ret;
+}
+
+static ssize_t show_occ_online(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct occ_drv_data *data = dev_get_drvdata(dev);
+
+ return snprintf(buf, PAGE_SIZE - 1, "%lu\n", data->occ_online);
+}
+
+static ssize_t set_occ_online(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct occ_drv_data *data = dev_get_drvdata(dev);
+ unsigned long val;
+ int err;
+
+ err = kstrtoul(buf, 10, &val);
+ if (err)
+ return err;
+
+ if (val == 1) {
+ if (data->occ_online == 1)
+ return count;
+
+ /* populate hwmon sysfs attr using sensor data */
+ dev_dbg(dev, "occ register hwmon @0x%x\n", data->client->addr);
+
+ data->hwmon_dev = hwmon_device_register(dev);
+ if (IS_ERR(data->hwmon_dev))
+ return PTR_ERR(data->hwmon_dev);
+
+ err = occ_create_hwmon_attribute(dev);
+ if (err) {
+ hwmon_device_unregister(data->hwmon_dev);
+ return err;
+ }
+ data->hwmon_dev->parent = dev;
+ dev_dbg(dev, "%s: sensor '%s'\n",
+ dev_name(data->hwmon_dev), data->client->name);
+ } else if (val == 0) {
+ if (data->occ_online == 0)
+ return count;
+
+ occ_remove_sysfs_files(data->hwmon_dev);
+ hwmon_device_unregister(data->hwmon_dev);
+ data->hwmon_dev = NULL;
+ } else
+ return -EINVAL;
+
+ data->occ_online = val;
+ return count;
+}
+
+static DEVICE_ATTR(online, S_IWUSR | S_IRUGO,
+ show_occ_online, set_occ_online);
+
+static int occ_create_sysfs_attribute(struct device *dev)
+{
+ /* create a sysfs attribute, to indicate whether OCC is active */
+ return device_create_file(dev, &dev_attr_online);
+}
+
+
+/* device probe and removal */
+
+enum occ_type {
+ occ_id,
+};
+
+static int occ_probe(struct i2c_client *client, const struct i2c_device_id *id)
+{
+ struct device *dev = &client->dev;
+ struct occ_drv_data *data;
+
+ data = devm_kzalloc(dev, sizeof(struct occ_drv_data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ data->client = client;
+ i2c_set_clientdata(client, data);
+ mutex_init(&data->update_lock);
+ data->update_interval = HZ;
+
+ occ_create_sysfs_attribute(dev);
+
+ dev_info(dev, "occ i2c driver ready: i2c addr at 0x%x\n", client->addr);
+
+ return 0;
+}
+
+static int occ_remove(struct i2c_client *client)
+{
+ struct occ_drv_data *data = i2c_get_clientdata(client);
+
+ /* free allocated sensor memory */
+ deinit_occ_resp_buf(&data->occ_resp);
+
+ device_remove_file(&client->dev, &dev_attr_online);
+
+ if (!data->hwmon_dev)
+ return 0;
+
+ occ_remove_sysfs_files(data->hwmon_dev);
+ hwmon_device_unregister(data->hwmon_dev);
+ return 0;
+}
+
+/* used by old-style board info. */
+static const struct i2c_device_id occ_ids[] = {
+ { OCC_I2C_NAME, occ_id, },
+ { /* LIST END */ }
+};
+MODULE_DEVICE_TABLE(i2c, occ_ids);
+
+/* use by device table */
+static const struct of_device_id i2c_occ_of_match[] = {
+ {.compatible = "ibm,occ-i2c"},
+ {},
+};
+MODULE_DEVICE_TABLE(of, i2c_occ_of_match);
+
+/* i2c-core uses i2c-detect() to detect device in bellow address list.
+ * If exists, address will be assigned to client.
+ * It is also possible to read address from device table.
+ */
+static const unsigned short normal_i2c[] = {0x50, 0x51, I2C_CLIENT_END };
+
+static struct i2c_driver occ_driver = {
+ .class = I2C_CLASS_HWMON,
+ .driver = {
+ .name = OCC_I2C_NAME,
+ .pm = NULL,
+ .of_match_table = i2c_occ_of_match,
+ },
+ .probe = occ_probe,
+ .remove = occ_remove,
+ .id_table = occ_ids,
+ .address_list = normal_i2c,
+};
+
+module_i2c_driver(occ_driver);
+
+MODULE_AUTHOR("Li Yi <shliyi at cn.ibm.com>");
+MODULE_DESCRIPTION("BMC OCC hwmon driver");
+MODULE_LICENSE("GPL");
--
2.6.4
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