[PATCH v2 8/9] staging: kpc2000: add separate show functions for readable kp device attributes, and defined them as read-only.
Jeremy Sowden
jeremy at azazel.net
Thu May 16 21:38:13 UTC 2019
Define separate simple show functions for each attribute instead of
having a one big one containing a chain of conditionals.
Replaced calls to scnprintf with sprintf since all the outputs are
single integers.
All the readable device attributes are read-only, so use DEVICE_ATTR_RO
to define them.
Signed-off-by: Jeremy Sowden <jeremy at azazel.net>
---
drivers/staging/kpc2000/kpc2000/core.c | 89 +++++++++++++++++++-------
1 file changed, 66 insertions(+), 23 deletions(-)
diff --git a/drivers/staging/kpc2000/kpc2000/core.c b/drivers/staging/kpc2000/kpc2000/core.c
index 6147c47c44ab..6fa3dd6531ef 100644
--- a/drivers/staging/kpc2000/kpc2000/core.c
+++ b/drivers/staging/kpc2000/kpc2000/core.c
@@ -19,33 +19,76 @@
#include <linux/jiffies.h>
#include "pcie.h"
-
static atomic_t next_card_num = ATOMIC_INIT(1);
/*******************************************************
* SysFS Attributes
******************************************************/
-static ssize_t show_attr(struct device *dev, struct device_attribute *attr, char *buf)
+
+static ssize_t ssid_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct kp2000_device *pcard = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%016llx\n", pcard->ssid);
+}
+
+static ssize_t ddna_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct kp2000_device *pcard = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%016llx\n", pcard->ddna);
+}
+
+static ssize_t card_id_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct kp2000_device *pcard = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%08x\n", pcard->card_id);
+}
+
+static ssize_t hw_rev_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
{
- struct kp2000_device *pcard = dev_get_drvdata(dev);
-
- if (strcmp("ssid", attr->attr.name) == 0){ return scnprintf(buf, PAGE_SIZE, "%016llx\n", pcard->ssid); } else
- if (strcmp("ddna", attr->attr.name) == 0){ return scnprintf(buf, PAGE_SIZE, "%016llx\n", pcard->ddna); } else
- if (strcmp("card_id", attr->attr.name) == 0){ return scnprintf(buf, PAGE_SIZE, "%08x\n", pcard->card_id); } else
- if (strcmp("hw_rev", attr->attr.name) == 0){ return scnprintf(buf, PAGE_SIZE, "%08x\n", pcard->hardware_revision); } else
- if (strcmp("build", attr->attr.name) == 0){ return scnprintf(buf, PAGE_SIZE, "%08x\n", pcard->build_version); } else
- if (strcmp("build_date", attr->attr.name) == 0){ return scnprintf(buf, PAGE_SIZE, "%08x\n", pcard->build_datestamp); } else
- if (strcmp("build_time", attr->attr.name) == 0){ return scnprintf(buf, PAGE_SIZE, "%08x\n", pcard->build_timestamp); } else
- { return -ENXIO; }
+ struct kp2000_device *pcard = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%08x\n", pcard->hardware_revision);
+}
+
+static ssize_t build_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct kp2000_device *pcard = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%08x\n", pcard->build_version);
+}
+
+static ssize_t build_date_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct kp2000_device *pcard = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%08x\n", pcard->build_datestamp);
+}
+
+static ssize_t build_time_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct kp2000_device *pcard = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%08x\n", pcard->build_timestamp);
}
-static ssize_t show_cpld_config_reg(struct device *dev, struct device_attribute *attr, char *buf)
+static ssize_t cpld_reg_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
{
struct kp2000_device *pcard = dev_get_drvdata(dev);
u64 val;
val = readq(pcard->sysinfo_regs_base + REG_CPLD_CONFIG);
- return scnprintf(buf, PAGE_SIZE, "%016llx\n", val);
+ return sprintf(buf, "%016llx\n", val);
}
static ssize_t cpld_reconfigure(struct device *dev,
@@ -68,15 +111,15 @@ static ssize_t cpld_reconfigure(struct device *dev,
return count;
}
-DEVICE_ATTR(ssid, 0444, show_attr, NULL);
-DEVICE_ATTR(ddna, 0444, show_attr, NULL);
-DEVICE_ATTR(card_id, 0444, show_attr, NULL);
-DEVICE_ATTR(hw_rev, 0444, show_attr, NULL);
-DEVICE_ATTR(build, 0444, show_attr, NULL);
-DEVICE_ATTR(build_date, 0444, show_attr, NULL);
-DEVICE_ATTR(build_time, 0444, show_attr, NULL);
-DEVICE_ATTR(cpld_reg, 0444, show_cpld_config_reg, NULL);
-DEVICE_ATTR(cpld_reconfigure, 0220, NULL, cpld_reconfigure);
+DEVICE_ATTR_RO(ssid);
+DEVICE_ATTR_RO(ddna);
+DEVICE_ATTR_RO(card_id);
+DEVICE_ATTR_RO(hw_rev);
+DEVICE_ATTR_RO(build);
+DEVICE_ATTR_RO(build_date);
+DEVICE_ATTR_RO(build_time);
+DEVICE_ATTR_RO(cpld_reg);
+DEVICE_ATTR(cpld_reconfigure, 0220, NULL, cpld_reconfigure);
static const struct attribute *kp_attr_list[] = {
&dev_attr_ssid.attr,
--
2.20.1
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