108 lines
3.1 KiB
Diff
108 lines
3.1 KiB
Diff
From 27afc3e0e791b6dbf0fb2c1ee5073a646089eb59 Mon Sep 17 00:00:00 2001
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From: Clayton Craft <clayton@craftyguy.net>
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Date: Fri, 5 Mar 2021 18:55:28 -0800
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Subject: [PATCH] bq25890_charger: enter ship mode on power off
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This sets the charger device into 'ship mode' when powering off by
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hooking onto pm_power_off. 'Ship mode' is skipped if the device is
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actively charging. This feature is disabled by default, and can be
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enabled by setting 'ship_mode=1' when loading this module.
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Since the poweroff can be aborted (i.e. when charging), any previous
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value for pm_power_off is saved and run in the cases where the
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bq25890 is *not* used to power off system.
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---
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drivers/power/supply/bq25890_charger.c | 56 ++++++++++++++++++++++++++
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1 file changed, 56 insertions(+)
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diff --git a/drivers/power/supply/bq25890_charger.c b/drivers/power/supply/bq25890_charger.c
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index ef3f152e2ba8..4e31a137bcba 100644
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--- a/drivers/power/supply/bq25890_charger.c
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+++ b/drivers/power/supply/bq25890_charger.c
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@@ -40,6 +40,10 @@ static const char *const bq25890_chip_name[] = {
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"BQ25896",
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};
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+static bool ship_mode;
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+module_param(ship_mode, bool, 0644);
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+MODULE_PARM_DESC(ship_mode, "Put device into 'ship mode' when powering off the computer");
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+
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enum bq25890_fields {
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F_EN_HIZ, F_EN_ILIM, F_IILIM, /* Reg00 */
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F_BHOT, F_BCOLD, F_VINDPM_OFS, /* Reg01 */
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@@ -928,6 +932,43 @@ static int bq25890_power_supply_init(struct bq25890_device *bq)
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return PTR_ERR_OR_ZERO(bq->charger);
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}
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+static struct bq25890_device *bq25890_dev;
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+void (*previous_pm_power_off)(void) = NULL;
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+static void bq25890_power_off(void)
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+{
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+ int ret;
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+
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+ /* Don't enable ship mode if charging */
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+ if (bq25890_dev->state.online) {
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+ dev_info(bq25890_dev->dev, "Charging, not entering ship mode");
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+ goto end;
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+ }
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+
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+ dev_info(bq25890_dev->dev, "Entering ship mode!");
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+
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+ /* Enable HIZ */
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+ dev_info(bq25890_dev->dev, "Enabling HIZ");
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+ ret = bq25890_field_write(bq25890_dev, F_EN_HIZ, 1);
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+ if (ret < 0)
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+ goto error;
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+
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+ /* Enable ship mode with no delay */
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+ dev_info(bq25890_dev->dev, "Ship mode w/ no delay");
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+ ret = bq25890_field_write(bq25890_dev, F_BATFET_DLY, 0);
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+ if (ret < 0)
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+ goto error;
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+ ret = bq25890_field_write(bq25890_dev, F_BATFET_DIS, 1);
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+ if (ret < 0)
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+ goto error;
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+
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+error:
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+ dev_err(bq25890_dev->dev, "Error entering ship mode.\n");
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+
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+end:
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+ if (previous_pm_power_off)
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+ previous_pm_power_off();
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+}
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+
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static void bq25890_usb_work(struct work_struct *data)
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{
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int ret;
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@@ -1232,6 +1273,17 @@ static int bq25890_probe(struct i2c_client *client,
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goto battery_fail;
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}
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+ if (ship_mode) {
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+ if (pm_power_off)
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+ previous_pm_power_off = pm_power_off;
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+ dev_info(bq->dev, "ship mode will be enabled");
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+ bq25890_dev = bq;
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+ pm_power_off = &bq25890_power_off;
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+ } else {
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+ dev_info(bq->dev, "ship mode not enabled");
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+ }
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+
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+
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return 0;
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battery_fail:
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@@ -1255,6 +1307,10 @@ static int bq25890_remove(struct i2c_client *client)
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/* reset all registers to default values */
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bq25890_chip_reset(bq);
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+ if (pm_power_off == &bq25890_power_off)
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+ /* restore previous pm_power_off */
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+ pm_power_off = previous_pm_power_off;
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+
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return 0;
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}
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--
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2.31.1
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