| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <df8eb78e18692292f5206a57c88fcefe6a1754de.1502271751.git-series.quentin.schulz@free-electrons.com>
Date: Wed, 9 Aug 2017 11:45:54 +0200
From: Quentin Schulz <quentin.schulz@...e-electrons.com>
To: dmitry.torokhov@...il.com, wens@...e.org, lee.jones@...aro.org
Cc: hdegoede@...hat.com, linux-input@...r.kernel.org,
linux-kernel@...r.kernel.org, thomas.petazzoni@...e-electrons.com,
maxime.ripard@...e-electrons.com,
Quentin Schulz <quentin.schulz@...e-electrons.com>
Subject: [PATCH v3 1/2] Input: axp20x-pek: use driver_data of platform_device_id instead of extended attributes
To prepare an upcoming patch adding support for another PMIC that has
different startup and shutdown time, use driver_data of
platform_device_id instead of a fixed extended device attribute.
By doing so, we also remove a lot of nested structures that aren't
useful.
With this patch, a new PMIC can be easily supported by just filling
correctly its ax20x_info structure and adding a platform_device_id.
Moreover, since we get rid of extended attributes, rename
axp20x_store_ext_attr to axp20x_store_attr and axp20x_show_ext_attr to
axp20x_show_attr.
Signed-off-by: Quentin Schulz <quentin.schulz@...e-electrons.com>
---
drivers/input/misc/axp20x-pek.c | 134 +++++++++++++++++++++------------
1 file changed, 89 insertions(+), 45 deletions(-)
diff --git a/drivers/input/misc/axp20x-pek.c b/drivers/input/misc/axp20x-pek.c
index cfeb0e9..f616fe5 100644
--- a/drivers/input/misc/axp20x-pek.c
+++ b/drivers/input/misc/axp20x-pek.c
@@ -29,9 +29,17 @@
#define AXP20X_PEK_STARTUP_MASK (0xc0)
#define AXP20X_PEK_SHUTDOWN_MASK (0x03)
+struct axp20x_info {
+ const struct axp20x_time *startup_time;
+ unsigned int startup_mask;
+ const struct axp20x_time *shutdown_time;
+ unsigned int shutdown_mask;
+};
+
struct axp20x_pek {
struct axp20x_dev *axp20x;
struct input_dev *input;
+ struct axp20x_info *info;
int irq_dbr;
int irq_dbf;
};
@@ -55,31 +63,18 @@ static const struct axp20x_time shutdown_time[] = {
{ .time = 10000, .idx = 3 },
};
-struct axp20x_pek_ext_attr {
- const struct axp20x_time *p_time;
- unsigned int mask;
-};
-
-static struct axp20x_pek_ext_attr axp20x_pek_startup_ext_attr = {
- .p_time = startup_time,
- .mask = AXP20X_PEK_STARTUP_MASK,
-};
-
-static struct axp20x_pek_ext_attr axp20x_pek_shutdown_ext_attr = {
- .p_time = shutdown_time,
- .mask = AXP20X_PEK_SHUTDOWN_MASK,
+static const struct axp20x_info axp20x_info = {
+ .startup_time = startup_time,
+ .startup_mask = AXP20X_PEK_STARTUP_MASK,
+ .shutdown_time = shutdown_time,
+ .shutdown_mask = AXP20X_PEK_SHUTDOWN_MASK,
};
-static struct axp20x_pek_ext_attr *get_axp_ext_attr(struct device_attribute *attr)
-{
- return container_of(attr, struct dev_ext_attribute, attr)->var;
-}
-
-static ssize_t axp20x_show_ext_attr(struct device *dev,
- struct device_attribute *attr, char *buf)
+static ssize_t axp20x_show_attr(struct device *dev,
+ const struct axp20x_time *time,
+ unsigned int mask, char *buf)
{
struct axp20x_pek *axp20x_pek = dev_get_drvdata(dev);
- struct axp20x_pek_ext_attr *axp20x_ea = get_axp_ext_attr(attr);
unsigned int val;
int ret, i;
@@ -87,22 +82,42 @@ static ssize_t axp20x_show_ext_attr(struct device *dev,
if (ret != 0)
return ret;
- val &= axp20x_ea->mask;
- val >>= ffs(axp20x_ea->mask) - 1;
+ val &= mask;
+ val >>= ffs(mask) - 1;
for (i = 0; i < 4; i++)
- if (val == axp20x_ea->p_time[i].idx)
- val = axp20x_ea->p_time[i].time;
+ if (val == time[i].idx)
+ val = time[i].time;
return sprintf(buf, "%u\n", val);
}
-static ssize_t axp20x_store_ext_attr(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
+static ssize_t axp20x_show_attr_startup(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct axp20x_pek *axp20x_pek = dev_get_drvdata(dev);
+
+ return axp20x_show_attr(dev, axp20x_pek->info->startup_time,
+ axp20x_pek->info->startup_mask, buf);
+}
+
+static ssize_t axp20x_show_attr_shutdown(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct axp20x_pek *axp20x_pek = dev_get_drvdata(dev);
+
+ return axp20x_show_attr(dev, axp20x_pek->info->shutdown_time,
+ axp20x_pek->info->shutdown_mask, buf);
+}
+
+static ssize_t axp20x_store_attr(struct device *dev,
+ const struct axp20x_time *time,
+ unsigned int mask, const char *buf,
+ size_t count)
{
struct axp20x_pek *axp20x_pek = dev_get_drvdata(dev);
- struct axp20x_pek_ext_attr *axp20x_ea = get_axp_ext_attr(attr);
char val_str[20];
size_t len;
int ret, i;
@@ -123,39 +138,52 @@ static ssize_t axp20x_store_ext_attr(struct device *dev,
for (i = 3; i >= 0; i--) {
unsigned int err;
- err = abs(axp20x_ea->p_time[i].time - val);
+ err = abs(time[i].time - val);
if (err < best_err) {
best_err = err;
- idx = axp20x_ea->p_time[i].idx;
+ idx = time[i].idx;
}
if (!err)
break;
}
- idx <<= ffs(axp20x_ea->mask) - 1;
- ret = regmap_update_bits(axp20x_pek->axp20x->regmap,
- AXP20X_PEK_KEY,
- axp20x_ea->mask, idx);
+ idx <<= ffs(mask) - 1;
+ ret = regmap_update_bits(axp20x_pek->axp20x->regmap, AXP20X_PEK_KEY,
+ mask, idx);
if (ret != 0)
return -EINVAL;
return count;
}
-static struct dev_ext_attribute axp20x_dev_attr_startup = {
- .attr = __ATTR(startup, 0644, axp20x_show_ext_attr, axp20x_store_ext_attr),
- .var = &axp20x_pek_startup_ext_attr,
-};
+static ssize_t axp20x_store_attr_startup(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct axp20x_pek *axp20x_pek = dev_get_drvdata(dev);
-static struct dev_ext_attribute axp20x_dev_attr_shutdown = {
- .attr = __ATTR(shutdown, 0644, axp20x_show_ext_attr, axp20x_store_ext_attr),
- .var = &axp20x_pek_shutdown_ext_attr,
-};
+ return axp20x_store_attr(dev, axp20x_pek->info->startup_time,
+ axp20x_pek->info->startup_mask, buf, count);
+}
+
+static ssize_t axp20x_store_attr_shutdown(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct axp20x_pek *axp20x_pek = dev_get_drvdata(dev);
+
+ return axp20x_store_attr(dev, axp20x_pek->info->shutdown_time,
+ axp20x_pek->info->shutdown_mask, buf, count);
+}
+
+DEVICE_ATTR(startup, 0644, axp20x_show_attr_startup, axp20x_store_attr_startup);
+DEVICE_ATTR(shutdown, 0644, axp20x_show_attr_shutdown,
+ axp20x_store_attr_shutdown);
static struct attribute *axp20x_attributes[] = {
- &axp20x_dev_attr_startup.attr.attr,
- &axp20x_dev_attr_shutdown.attr.attr,
+ &dev_attr_startup.attr,
+ &dev_attr_shutdown.attr,
NULL,
};
@@ -291,8 +319,14 @@ static bool axp20x_pek_should_register_input(struct axp20x_pek *axp20x_pek,
static int axp20x_pek_probe(struct platform_device *pdev)
{
struct axp20x_pek *axp20x_pek;
+ const struct platform_device_id *match = platform_get_device_id(pdev);
int error;
+ if (!match) {
+ dev_err(&pdev->dev, "Failed to get platform_device_id\n");
+ return -EINVAL;
+ }
+
axp20x_pek = devm_kzalloc(&pdev->dev, sizeof(struct axp20x_pek),
GFP_KERNEL);
if (!axp20x_pek)
@@ -306,6 +340,8 @@ static int axp20x_pek_probe(struct platform_device *pdev)
return error;
}
+ axp20x_pek->info = (struct axp20x_info *)match->driver_data;
+
error = devm_device_add_group(&pdev->dev, &axp20x_attribute_group);
if (error) {
dev_err(&pdev->dev, "Failed to create sysfs attributes: %d\n",
@@ -342,8 +378,16 @@ static const struct dev_pm_ops axp20x_pek_pm_ops = {
#endif
};
+static const struct platform_device_id axp_pek_id_match[] = {
+ {
+ .name = "axp20x-pek",
+ .driver_data = (kernel_ulong_t)&axp20x_info,
+ },
+};
+
static struct platform_driver axp20x_pek_driver = {
.probe = axp20x_pek_probe,
+ .id_table = axp_pek_id_match,
.driver = {
.name = "axp20x-pek",
.pm = &axp20x_pek_pm_ops,
--
git-series 0.9.1
Powered by blists - more mailing lists