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power: supply: qti_battery_charger: Enable Ship mode shutdown

Browse Source 
This feature is to enable the disconnection of the battery from the
device as the final step in the assembly of a phone on the factory floor
to prevent battery rundown while in transit to the hands of the final
consumer.

Usage:
  # echo 1 > /sys/class/qcom-battery/ship_mode_en
  Following this, either manually shut down using power key, or:
  # reboot -p

Change-Id: Ifef053c6ebb3b86c10f9dbe3c9c47d7c3548d95b
Signed-off-by: Guru Das Srinagesh <gurus@codeaurora.org>
This commit is contained in:
Guru Das Srinagesh 2020-06-12 19:53:00 -07:00 committed by Anjelique Melendez
parent 53f3a0ff88
commit 640c25fb23
1 changed files with 68 additions and 0 deletions
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68
drivers/power/supply/qti_battery_charger.c
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@ -12,6 +12,7 @@
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/reboot.h>
#include <linux/rpmsg.h>
#include <linux/mutex.h>
#include <linux/power_supply.h>
@ -31,6 +32,7 @@
#define BC_USB_STATUS_SET 0x33
#define BC_WLS_STATUS_GET 0x34
#define BC_WLS_STATUS_SET 0x35
#define BC_SHIP_MODE_REQ_SET 0x36
#define BC_WLS_FW_CHECK_UPDATE 0x40
#define BC_WLS_FW_PUSH_BUF_REQ 0x41
#define BC_WLS_FW_UPDATE_STATUS_RESP 0x42
@ -52,6 +54,11 @@ enum psy_type {
PSY_TYPE_MAX,
};
enum ship_mode_type {
SHIP_MODE_PMIC,
SHIP_MODE_PACK_SIDE,
};
/* property ids */
enum battery_property_id {
BATT_STATUS,
@ -175,6 +182,11 @@ struct wireless_fw_get_version_resp {
u32 fw_version;
};
struct battery_charger_ship_mode_req_msg {
struct pmic_glink_hdr hdr;
u32 ship_mode_type;
};
struct psy_state {
struct power_supply *psy;
char *model;
@ -203,9 +215,11 @@ struct battery_chg_dev {
struct work_struct subsys_up_work;
int fake_soc;
bool block_tx;
bool ship_mode_en;
bool debug_battery_detected;
bool wls_fw_update_reqd;
u32 wls_fw_version;
struct notifier_block reboot_notifier;
};
static const int battery_prop_map[BATT_PROP_MAX] = {
@ -1359,6 +1373,28 @@ static ssize_t soh_show(struct class *c, struct class_attribute *attr,
}
static CLASS_ATTR_RO(soh);
static ssize_t ship_mode_en_store(struct class *c, struct class_attribute *attr,
const char *buf, size_t count)
{
struct battery_chg_dev *bcdev = container_of(c, struct battery_chg_dev,
battery_class);
if (kstrtobool(buf, &bcdev->ship_mode_en))
return -EINVAL;
return count;
}
static ssize_t ship_mode_en_show(struct class *c, struct class_attribute *attr,
char *buf)
{
struct battery_chg_dev *bcdev = container_of(c, struct battery_chg_dev,
battery_class);
return scnprintf(buf, PAGE_SIZE, "%d\n", bcdev->ship_mode_en);
}
static CLASS_ATTR_RW(ship_mode_en);
static struct attribute *battery_class_attrs[] = {
&class_attr_soh.attr,
&class_attr_resistance.attr,
@ -1369,6 +1405,7 @@ static struct attribute *battery_class_attrs[] = {
&class_attr_wireless_fw_update.attr,
&class_attr_wireless_fw_force_update.attr,
&class_attr_wireless_fw_version.attr,
&class_attr_ship_mode_en.attr,
NULL,
};
ATTRIBUTE_GROUPS(battery_class);
@ -1468,6 +1505,31 @@ static int battery_chg_parse_dt(struct battery_chg_dev *bcdev)
return 0;
}
static int battery_chg_ship_mode(struct notifier_block *nb, unsigned long code,
void *unused)
{
struct battery_charger_ship_mode_req_msg msg = { { 0 } };
struct battery_chg_dev *bcdev = container_of(nb, struct battery_chg_dev,
reboot_notifier);
int rc;
if (!bcdev->ship_mode_en)
return NOTIFY_DONE;
msg.hdr.owner = MSG_OWNER_BC;
msg.hdr.type = MSG_TYPE_REQ_RESP;
msg.hdr.opcode = BC_SHIP_MODE_REQ_SET;
msg.ship_mode_type = SHIP_MODE_PMIC;
if (code == SYS_POWER_OFF) {
rc = battery_chg_write(bcdev, &msg, sizeof(msg));
if (rc < 0)
pr_emerg("Failed to write ship mode: %d\n", rc);
}
return NOTIFY_DONE;
}
static int battery_chg_probe(struct platform_device *pdev)
{
struct battery_chg_dev *bcdev;
@ -1528,6 +1590,10 @@ static int battery_chg_probe(struct platform_device *pdev)
return rc;
}
bcdev->reboot_notifier.notifier_call = battery_chg_ship_mode;
bcdev->reboot_notifier.priority = 255;
register_reboot_notifier(&bcdev->reboot_notifier);
rc = battery_chg_parse_dt(bcdev);
if (rc < 0)
goto error;
@ -1553,6 +1619,7 @@ static int battery_chg_probe(struct platform_device *pdev)
return 0;
error:
pmic_glink_unregister_client(bcdev->client);
unregister_reboot_notifier(&bcdev->reboot_notifier);
return rc;
}
@ -1564,6 +1631,7 @@ static int battery_chg_remove(struct platform_device *pdev)
device_init_wakeup(bcdev->dev, false);
debugfs_remove_recursive(bcdev->debugfs_dir);
class_unregister(&bcdev->battery_class);
unregister_reboot_notifier(&bcdev->reboot_notifier);
rc = pmic_glink_unregister_client(bcdev->client);
if (rc < 0) {
pr_err("Error unregistering from pmic_glink, rc=%d\n", rc);