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Subject[PATCH v2 3/4] mfd: menf21bmc: Add additional sysfs entries for BMC status information
This patch adds additional sysfs entries to provide status
information to the userland.

The following informations are now provided:
- Get operation hours counter
- Get board slot address
- Get powercycle counter
- Set/get Hw Variant

Signed-off-by: Andreas Werner <andreas.werner@men.de>
---
drivers/mfd/menf21bmc.c | 93 +++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 93 insertions(+)

diff --git a/drivers/mfd/menf21bmc.c b/drivers/mfd/menf21bmc.c
index b11bd6b..dd068c0 100644
--- a/drivers/mfd/menf21bmc.c
+++ b/drivers/mfd/menf21bmc.c
@@ -20,6 +20,10 @@
#define BMC_CMD_REV_MAJOR 0x80
#define BMC_CMD_REV_MINOR 0x81
#define BMC_CMD_REV_MAIN 0x82
+#define BMC_CMD_SLOT_ADDRESS 0x8c
+#define BMC_CMD_HW_VARIANT 0x8f
+#define BMC_CMD_PWRCYCL_CNT 0x93
+#define BMC_CMD_OP_HRS_CNT 0x94

static struct mfd_cell menf21bmc_cell[] = {
{ .name = "menf21bmc_wdt", },
@@ -66,11 +70,100 @@ static ssize_t menf21bmc_mode_store(struct device *dev,
return size;
}

+static ssize_t menf21bmc_hw_variant_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ int val;
+
+ val = i2c_smbus_read_word_data(client, BMC_CMD_HW_VARIANT);
+ if (val < 0)
+ return val;
+
+ return sprintf(buf, "0x%04x\n", val);
+
+}
+
+static ssize_t menf21bmc_hw_variant_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t size)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ unsigned long hw_variant;
+ int ret;
+
+ if (kstrtoul(buf, 0, &hw_variant))
+ return -EINVAL;
+
+ if (hw_variant < 0 || hw_variant > 0xffff)
+ return -EINVAL;
+
+ ret = i2c_smbus_write_word_data(client, BMC_CMD_HW_VARIANT,
+ hw_variant);
+ if (ret < 0)
+ return ret;
+
+ return size;
+
+}
+
+static ssize_t menf21bmc_pwrcycl_cnt_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ int val;
+
+ val = i2c_smbus_read_word_data(client, BMC_CMD_PWRCYCL_CNT);
+ if (val < 0)
+ return val;
+
+ return sprintf(buf, "%d\n", val);
+}
+
+static ssize_t menf21bmc_op_hrs_cnt_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ int val;
+
+ val = i2c_smbus_read_word_data(client, BMC_CMD_OP_HRS_CNT);
+ if (val < 0)
+ return val;
+
+ return sprintf(buf, "%d\n", val);
+}
+
+static ssize_t menf21bmc_slot_address_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ int val;
+
+ val = i2c_smbus_read_byte_data(client, BMC_CMD_SLOT_ADDRESS);
+ if (val < 0)
+ return val;
+
+ return sprintf(buf, "%d\n", val);
+}
+
static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR, menf21bmc_mode_show,
menf21bmc_mode_store);
+static DEVICE_ATTR(hw_variant, S_IRUGO | S_IWUSR, menf21bmc_hw_variant_show,
+ menf21bmc_hw_variant_store);
+static DEVICE_ATTR(pwrcycl_cnt, S_IRUGO, menf21bmc_pwrcycl_cnt_show, NULL);
+static DEVICE_ATTR(op_hrs_cnt, S_IRUGO, menf21bmc_op_hrs_cnt_show, NULL);
+static DEVICE_ATTR(slot_address, S_IRUGO, menf21bmc_slot_address_show, NULL);

static struct attribute *menf21bmc_attributes[] = {
&dev_attr_mode.attr,
+ &dev_attr_hw_variant.attr,
+ &dev_attr_pwrcycl_cnt.attr,
+ &dev_attr_op_hrs_cnt.attr,
+ &dev_attr_slot_address.attr,
NULL
};

--
2.6.2
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