[PATCH 1/2] hwmon, fam15h_power: Make actual power reporting conditional

From: Aravind Gopalakrishnan
Date: Tue Sep 16 2014 - 11:21:20 EST


power1_input should only be reported for Fam15h, Models 00h-0fh
So, introduce a is_visible function to take care of this.

As suggested by Guenter here:
http://marc.info/?l=linux-kernel&m=141038145616437&w=2

Suggested-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Signed-off-by: Aravind Gopalakrishnan <Aravind.Gopalakrishnan@xxxxxxx>
---
drivers/hwmon/fam15h_power.c | 19 ++++++++++++++++++-
1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/drivers/hwmon/fam15h_power.c b/drivers/hwmon/fam15h_power.c
index 4a7cbfa..5ca24de 100644
--- a/drivers/hwmon/fam15h_power.c
+++ b/drivers/hwmon/fam15h_power.c
@@ -93,13 +93,30 @@ static ssize_t show_power_crit(struct device *dev,
}
static DEVICE_ATTR(power1_crit, S_IRUGO, show_power_crit, NULL);

+static umode_t fam15h_power_is_visible(struct kobject *kobj,
+ struct attribute *attr,
+ int index)
+{
+ /* power1_input is only reported for Fam15h, Models 00h-0fh */
+ if (!strcmp(attr->name, "power1_input") &&
+ (boot_cpu_data.x86 != 0x15 || boot_cpu_data.x86_model > 0xf)) {
+ return 0;
+ }
+
+ return attr->mode;
+}
+
static struct attribute *fam15h_power_attrs[] = {
&dev_attr_power1_input.attr,
&dev_attr_power1_crit.attr,
NULL
};

-ATTRIBUTE_GROUPS(fam15h_power);
+static const struct attribute_group fam15h_power_group = {
+ .attrs = fam15h_power_attrs,
+ .is_visible = fam15h_power_is_visible,
+};
+__ATTRIBUTE_GROUPS(fam15h_power);

static bool fam15h_power_is_internal_node0(struct pci_dev *f4)
{
--
2.0.2

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