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cnss2: Add sysfs entry for system shutdown

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Add sysfs entry '/sys/kernel/shutdown_wlan/shutdown'.
When system is shutting down or rebooting, this entry will be
written so that drvier can be notified and handle it properly.

Change-Id: I2537a2893f8787ff7c9d33608ef6c42075c3d128
Signed-off-by: Yu Wang <yyuwang@codeaurora.org>
Signed-off-by: Yue Ma <yuem@codeaurora.org>
This commit is contained in:
Yu Wang 2020-01-10 16:43:16 -08:00 • committed by Yue Ma
commit c3985a135a
2 changed files with 64 additions and 1 deletions
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64
drivers/net/wireless/cnss2/main.c
View file

@ -642,6 +642,13 @@ int cnss_idle_restart(struct device *dev)
timeout = cnss_get_boot_timeout(dev);
reinit_completion(&plat_priv->power_up_complete);
if (test_bit(CNSS_IN_REBOOT, &plat_priv->driver_state)) {
cnss_pr_dbg("Reboot or shutdown is in progress, ignore idle restart\n");
ret = -EINVAL;
goto out;
}
ret = wait_for_completion_timeout(&plat_priv->power_up_complete,
msecs_to_jiffies(timeout) << 2);
if (!ret) {
@ -1918,6 +1925,23 @@ static void cnss_unregister_bus_scale(struct cnss_plat_data *plat_priv)
icc_put(bus_bw_info->cnss_path);
}
static ssize_t shutdown_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t count)
{
struct cnss_plat_data *plat_priv = cnss_get_plat_priv(NULL);
if (plat_priv) {
set_bit(CNSS_IN_REBOOT, &plat_priv->driver_state);
del_timer(&plat_priv->fw_boot_timer);
complete_all(&plat_priv->power_up_complete);
}
cnss_pr_dbg("Received shutdown notification\n");
return count;
}
static ssize_t fs_ready_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
@ -1961,18 +1985,55 @@ static ssize_t fs_ready_store(struct device *dev,
return count;
}
static struct kobj_attribute shutdown_attribute = __ATTR_WO(shutdown);
static DEVICE_ATTR_WO(fs_ready);
static int cnss_create_shutdown_sysfs(struct cnss_plat_data *plat_priv)
{
int ret = 0;
plat_priv->shutdown_kobj = kobject_create_and_add("shutdown_wlan",
kernel_kobj);
if (!plat_priv->shutdown_kobj) {
cnss_pr_err("Failed to create shutdown_wlan kernel object\n");
return -ENOMEM;
}
ret = sysfs_create_file(plat_priv->shutdown_kobj,
&shutdown_attribute.attr);
if (ret) {
cnss_pr_err("Failed to create sysfs shutdown file, err = %d\n",
ret);
kobject_put(plat_priv->shutdown_kobj);
plat_priv->shutdown_kobj = NULL;
}
return ret;
}
static void cnss_remove_shutdown_sysfs(struct cnss_plat_data *plat_priv)
{
if (plat_priv->shutdown_kobj) {
sysfs_remove_file(plat_priv->shutdown_kobj,
&shutdown_attribute.attr);
kobject_put(plat_priv->shutdown_kobj);
plat_priv->shutdown_kobj = NULL;
}
}
static int cnss_create_sysfs(struct cnss_plat_data *plat_priv)
{
int ret = 0;
ret = device_create_file(&plat_priv->plat_dev->dev, &dev_attr_fs_ready);
if (ret) {
cnss_pr_err("Failed to create device file, err = %d\n", ret);
cnss_pr_err("Failed to create device fs_ready file, err = %d\n",
ret);
goto out;
}
cnss_create_shutdown_sysfs(plat_priv);
return 0;
out:
return ret;
@ -1980,6 +2041,7 @@ out:
static void cnss_remove_sysfs(struct cnss_plat_data *plat_priv)
{
cnss_remove_shutdown_sysfs(plat_priv);
device_remove_file(&plat_priv->plat_dev->dev, &dev_attr_fs_ready);
}

1
drivers/net/wireless/cnss2/main.h
View file

@ -374,6 +374,7 @@ struct cnss_plat_data {
int (*get_info_cb)(void *ctx, void *event, int event_len);
u8 use_nv_mac;
u8 set_wlaon_pwr_ctrl;
struct kobject *shutdown_kobj;
};
#ifdef CONFIG_ARCH_QCOM