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| author |   Russ Weight <russell.h.weight@intel.com> | 2021-01-14 15:16:48 -0800 |
|---|---|---|
| committer |   Lee Jones <lee.jones@linaro.org> | 2021-02-08 13:54:25 +0000 |
| commit | 296f5568c6ee906e2a8db00adc751674f1745bd8 (patch) | |
| tree | 5ba9bdf7057b50b420349d087b69406153ee8f8c /drivers/mfd/intel-m10-bmc.c | |
| parent | mfd: Add driver for Embedded Controller found on Acer Iconia Tab A500 (diff) | |
| download | linux-dev-296f5568c6ee906e2a8db00adc751674f1745bd8.tar.xz linux-dev-296f5568c6ee906e2a8db00adc751674f1745bd8.zip | |
mfd: intel-m10-bmc: Expose MAC address and count
Create two sysfs entries for exposing the MAC address and count
from the MAX10 BMC register space. The MAC address is the first
in a sequential block of MAC addresses reserved for the FPGA card.
The MAC count is the number of MAC addresses in the reserved block.
Signed-off-by: Russ Weight <russell.h.weight@intel.com>
Signed-off-by: Xu Yilun <yilun.xu@intel.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'drivers/mfd/intel-m10-bmc.c')
| -rw-r--r-- | drivers/mfd/intel-m10-bmc.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/drivers/mfd/intel-m10-bmc.c b/drivers/mfd/intel-m10-bmc.c index b84579b7b4f0..06c977519479 100644 --- a/drivers/mfd/intel-m10-bmc.c +++ b/drivers/mfd/intel-m10-bmc.c @@ -60,9 +60,52 @@ static ssize_t bmcfw_version_show(struct device *dev, } static DEVICE_ATTR_RO(bmcfw_version); +static ssize_t mac_address_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct intel_m10bmc *max10 = dev_get_drvdata(dev); + unsigned int macaddr_low, macaddr_high; + int ret; + + ret = m10bmc_sys_read(max10, M10BMC_MAC_LOW, &macaddr_low); + if (ret) + return ret; + + ret = m10bmc_sys_read(max10, M10BMC_MAC_HIGH, &macaddr_high); + if (ret) + return ret; + + return sysfs_emit(buf, "%02x:%02x:%02x:%02x:%02x:%02x\n", + (u8)FIELD_GET(M10BMC_MAC_BYTE1, macaddr_low), + (u8)FIELD_GET(M10BMC_MAC_BYTE2, macaddr_low), + (u8)FIELD_GET(M10BMC_MAC_BYTE3, macaddr_low), + (u8)FIELD_GET(M10BMC_MAC_BYTE4, macaddr_low), + (u8)FIELD_GET(M10BMC_MAC_BYTE5, macaddr_high), + (u8)FIELD_GET(M10BMC_MAC_BYTE6, macaddr_high)); +} +static DEVICE_ATTR_RO(mac_address); + +static ssize_t mac_count_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct intel_m10bmc *max10 = dev_get_drvdata(dev); + unsigned int macaddr_high; + int ret; + + ret = m10bmc_sys_read(max10, M10BMC_MAC_HIGH, &macaddr_high); + if (ret) + return ret; + + return sysfs_emit(buf, "%u\n", + (u8)FIELD_GET(M10BMC_MAC_COUNT, macaddr_high)); +} +static DEVICE_ATTR_RO(mac_count); + static struct attribute *m10bmc_attrs[] = { &dev_attr_bmc_version.attr, &dev_attr_bmcfw_version.attr, + &dev_attr_mac_address.attr, + &dev_attr_mac_count.attr, NULL, }; ATTRIBUTE_GROUPS(m10bmc); |