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staging: gasket: add unique chip id sysfs node

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Change-Id: I15ee278e212b76dfd649f03f256870b9872c3395
Signed-off-by: Leonid Lobachev <leonidl@google.com>
This commit is contained in:
Leonid Lobachev
2019-10-18 11:00:24 -07:00
parent f003a96909
commit a9b97c3f92
1 changed files with 20 additions and 1 deletions
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21
apex_driver.c
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@@ -89,6 +89,7 @@ enum sysfs_attribute_type {
ATTR_TEMP_TRIP1,
ATTR_TEMP_TRIP2,
ATTR_TEMP_POLL_INTERVAL,
ATTR_UNIQUE_ID,
};
/*
@@ -124,6 +125,10 @@ enum apex_bar2_regs {
APEX_BAR2_REG_OMC0_D4 = 0x01a0d4,
APEX_BAR2_REG_OMC0_D8 = 0x01a0d8,
APEX_BAR2_REG_OMC0_DC = 0x01a0dc,
APEX_BAR2_REG_EFUSE_DC = 0x01a2dc,
APEX_BAR2_REG_EFUSE_E0 = 0x01a2e0,
APEX_BAR2_REG_EFUSE_E4 = 0x01a2e4,
APEX_BAR2_REG_EFUSE_E8 = 0x01a2e8,
/* Error registers - Used mostly for debug */
APEX_BAR2_REG_USER_HIB_ERROR_STATUS = 0x86f0,
@@ -635,7 +640,7 @@ static ssize_t sysfs_show(struct device *device, struct device_attribute *attr,
char *buf)
{
int ret;
unsigned value;
unsigned value, value2, value3, value4;
struct gasket_dev *gasket_dev;
struct apex_dev *apex_dev;
struct gasket_sysfs_attribute *gasket_attr;
@@ -722,6 +727,19 @@ static ssize_t sysfs_show(struct device *device, struct device_attribute *attr,
ret = scnprintf(buf, PAGE_SIZE, "%i\n",
atomic_read(&apex_dev->temp_poll_interval));
break;
case ATTR_UNIQUE_ID:
value = gasket_dev_read_32(gasket_dev, APEX_BAR_INDEX,
APEX_BAR2_REG_EFUSE_DC);
value2 = gasket_dev_read_32(gasket_dev, APEX_BAR_INDEX,
APEX_BAR2_REG_EFUSE_E0);
value3 = gasket_dev_read_32(gasket_dev, APEX_BAR_INDEX,
APEX_BAR2_REG_EFUSE_E4);
value4 = gasket_dev_read_32(gasket_dev, APEX_BAR_INDEX,
APEX_BAR2_REG_EFUSE_E8);
ret = snprintf(buf, PAGE_SIZE, "%.8x%.8x%.8x%.8x\n", value4,
value3, value2, value);
break;
default:
dev_dbg(gasket_dev->dev, "Unknown attribute: %s\n",
attr->attr.name);
@@ -857,6 +875,7 @@ static struct gasket_sysfs_attribute apex_sysfs_attrs[] = {
ATTR_TEMP_TRIP2),
GASKET_SYSFS_RW(temp_poll_interval, sysfs_show, sysfs_store,
ATTR_TEMP_POLL_INTERVAL),
GASKET_SYSFS_RO(unique_id, sysfs_show, ATTR_UNIQUE_ID),
GASKET_END_OF_ATTR_ARRAY
};