[PATCH v4 05/20] power: supply: bq25890: Add support to skip reset at probe() / remove()
From: Hans de Goede <hidden>
Date: 2021-12-06 09:34:00
Also in:
linux-acpi, linux-efi, lkml, platform-driver-x86
Subsystem:
power supply class/subsystem and drivers, the rest · Maintainers:
Sebastian Reichel, Linus Torvalds
On most x86/ACPI devices the firmware already fully initializes the bq25890 charger at boot, in this case it is best to not reset it at probe() time. At support for a new "linux,skip-reset" boolean property to support this. So far this new property is only used on x86/ACPI (non devicetree) devs, IOW it is not used in actual devicetree files. The devicetree-bindings maintainers have requested properties like these to not be added to the devicetree-bindings, so the new property is deliberately not added to the existing devicetree-bindings. Signed-off-by: Hans de Goede <redacted> --- Changes in v2: - New patch in v2 of this series, together with the "linux,read-back-settings" patch, this patch replaces the "ti,skip-init" patch from v1 --- drivers/power/supply/bq25890_charger.c | 19 +++++++++++++------ 1 file changed, 13 insertions(+), 6 deletions(-)
diff --git a/drivers/power/supply/bq25890_charger.c b/drivers/power/supply/bq25890_charger.c
index eaf0400b632f..cd80d748df92 100644
--- a/drivers/power/supply/bq25890_charger.c
+++ b/drivers/power/supply/bq25890_charger.c@@ -110,6 +110,7 @@ struct bq25890_device { struct regmap *rmap; struct regmap_field *rmap_fields[F_MAX_FIELDS]; + bool skip_reset; enum bq25890_chip_version chip_version; struct bq25890_init_data init_data; struct bq25890_state state;
@@ -739,10 +740,12 @@ static int bq25890_hw_init(struct bq25890_device *bq) { int ret; - ret = bq25890_chip_reset(bq); - if (ret < 0) { - dev_dbg(bq->dev, "Reset failed %d\n", ret); - return ret; + if (!bq->skip_reset) { + ret = bq25890_chip_reset(bq); + if (ret < 0) { + dev_dbg(bq->dev, "Reset failed %d\n", ret); + return ret; + } } /* disable watchdog */
@@ -977,6 +980,8 @@ static int bq25890_fw_probe(struct bq25890_device *bq) int ret; struct bq25890_init_data *init = &bq->init_data; + bq->skip_reset = device_property_read_bool(bq->dev, "linux,skip-reset"); + ret = bq25890_fw_read_u32_props(bq); if (ret < 0) return ret;
@@ -1089,8 +1094,10 @@ static int bq25890_remove(struct i2c_client *client) if (!IS_ERR_OR_NULL(bq->usb_phy)) usb_unregister_notifier(bq->usb_phy, &bq->usb_nb); - /* reset all registers to default values */ - bq25890_chip_reset(bq); + if (!bq->skip_reset) { + /* reset all registers to default values */ + bq25890_chip_reset(bq); + } return 0; }
--
2.33.1