The Lenovo Yoga Tab 3 (YT3-X90F) is an Intel Cherry Trail based tablet
which ships with Android as Factory OS. Its DSDT contains a bunch of I2C
devices which are not actually there, causing various resource conflicts.
Use acpi_quirk_skip_i2c_client_enumeration() to not enumerate these.
The YT3-X90F has quite a bit of exotic hardware, this adds initial
support by manually instantiating the i2c-clients for the 2 charger +
2 fuel-gauge chips used for the 2 batteries.
Support for other parts of the hw will be added by follow-up patches.
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
---
drivers/platform/x86/x86-android-tablets.c | 129 ++++++++++++++++++++-
1 file changed, 128 insertions(+), 1 deletion(-)
diff --git a/drivers/platform/x86/x86-android-tablets.c b/drivers/platform/x86/x86-android-tablets.c
index f04e06eeb958..dd933cf32b38 100644
--- a/drivers/platform/x86/x86-android-tablets.c
+++ b/drivers/platform/x86/x86-android-tablets.c
@@ -5,7 +5,7 @@
* devices typically have a bunch of things hardcoded, rather than specified
* in their DSDT.
*
- * Copyright (C) 2021 Hans de Goede <hdegoede@xxxxxxxxxx>
+ * Copyright (C) 2021-2022 Hans de Goede <hdegoede@xxxxxxxxxx>
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
@@ -987,6 +987,124 @@ static void lenovo_yoga_tab2_830_1050_exit(void)
}
}
+/* Lenovo Yoga Tab 3 Pro YT3-X90F */
+
+/*
+ * There are 2 batteries, with 2 bq27500 fuel-gauges and 2 bq25892 chargers,
+ * "bq25890-charger-1" is instantiated from: drivers/i2c/busses/i2c-cht-wc.c.
+ */
+static const char * const lenovo_yt3_bq25892_0_suppliers[] = { "cht_wcove_pwrsrc" };
+static const char * const bq25890_1_psy[] = { "bq25890-charger-1" };
+
+static const struct property_entry fg_bq25890_1_supply_props[] = {
+ PROPERTY_ENTRY_STRING_ARRAY("supplied-from", bq25890_1_psy),
+ { }
+};
+
+static const struct software_node fg_bq25890_1_supply_node = {
+ .properties = fg_bq25890_1_supply_props,
+};
+
+/* bq25892 charger settings for the flat lipo battery behind the screen */
+static const struct property_entry lenovo_yt3_bq25892_0_props[] = {
+ PROPERTY_ENTRY_STRING_ARRAY("supplied-from", lenovo_yt3_bq25892_0_suppliers),
+ PROPERTY_ENTRY_STRING("linux,power-supply-name", "bq25892-second-chrg"),
+ PROPERTY_ENTRY_U32("linux,iinlim-percentage", 40),
+ PROPERTY_ENTRY_BOOL("linux,skip-reset"),
+ /* Values taken from Android Factory Image */
+ PROPERTY_ENTRY_U32("ti,charge-current", 2048000),
+ PROPERTY_ENTRY_U32("ti,battery-regulation-voltage", 4352000),
+ PROPERTY_ENTRY_U32("ti,termination-current", 128000),
+ PROPERTY_ENTRY_U32("ti,precharge-current", 128000),
+ PROPERTY_ENTRY_U32("ti,minimum-sys-voltage", 3700000),
+ PROPERTY_ENTRY_U32("ti,boost-voltage", 4998000),
+ PROPERTY_ENTRY_U32("ti,boost-max-current", 500000),
+ PROPERTY_ENTRY_BOOL("ti,use-ilim-pin"),
+ { }
+};
+
+static const struct software_node lenovo_yt3_bq25892_0_node = {
+ .properties = lenovo_yt3_bq25892_0_props,
+};
+
+static const struct x86_i2c_client_info lenovo_yt3_i2c_clients[] __initconst = {
+ {
+ /* bq27500 fuel-gauge for the flat lipo battery behind the screen */
+ .board_info = {
+ .type = "bq27500",
+ .addr = 0x55,
+ .dev_name = "bq27500_0",
+ .swnode = &fg_bq25890_supply_node,
+ },
+ .adapter_path = "\\_SB_.PCI0.I2C1",
+ }, {
+ /* bq25892 charger for the flat lipo battery behind the screen */
+ .board_info = {
+ .type = "bq25892",
+ .addr = 0x6b,
+ .dev_name = "bq25892_0",
+ .swnode = &lenovo_yt3_bq25892_0_node,
+ },
+ .adapter_path = "\\_SB_.PCI0.I2C1",
+ .irq_data = {
+ .type = X86_ACPI_IRQ_TYPE_GPIOINT,
+ .chip = "INT33FF:01",
+ .index = 5,
+ .trigger = ACPI_EDGE_SENSITIVE,
+ .polarity = ACPI_ACTIVE_LOW,
+ },
+ }, {
+ /* bq27500 fuel-gauge for the round li-ion cells in the hinge */
+ .board_info = {
+ .type = "bq27500",
+ .addr = 0x55,
+ .dev_name = "bq27500_1",
+ .swnode = &fg_bq25890_1_supply_node,
+ },
+ .adapter_path = "\\_SB_.PCI0.I2C2",
+ }
+};
+
+static int __init lenovo_yt3_init(void)
+{
+ struct gpio_desc *gpiod;
+ int ret;
+
+ /*
+ * The "bq25892_0" charger IC has its /CE (Charge-Enable) and OTG pins
+ * connected to GPIOs, rather then having them hardwired to the correct
+ * values as is normally done.
+ *
+ * The bq25890_charger driver controls these through I2C, but this only
+ * works if not overridden by the pins. Set these pins here:
+ * 1. Set /CE to 0 to allow charging.
+ * 2. Set OTG to 0 disable V5 boost output since the 5V boost output of
+ * the main "bq25892_1" charger is used when necessary.
+ */
+
+ /* /CE pin */
+ ret = x86_android_tablet_get_gpiod("INT33FF:02", 22, &gpiod);
+ if (ret < 0)
+ return ret;
+
+ gpiod_set_value(gpiod, 0);
+
+ /* OTG pin */
+ ret = x86_android_tablet_get_gpiod("INT33FF:03", 19, &gpiod);
+ if (ret < 0)
+ return ret;
+
+ gpiod_set_value(gpiod, 0);
+
+ return 0;
+}
+
+static const struct x86_dev_info lenovo_yt3_info __initconst = {
+ .i2c_client_info = lenovo_yt3_i2c_clients,
+ .i2c_client_count = ARRAY_SIZE(lenovo_yt3_i2c_clients),
+ .init = lenovo_yt3_init,
+};
+
/* Medion Lifetab S10346 tablets have an Android factory img with everything hardcoded */
static const char * const medion_lifetab_s10346_accel_mount_matrix[] = {
"0", "1", "0",
@@ -1327,6 +1445,15 @@ static const struct dmi_system_id x86_android_tablet_ids[] __initconst = {
},
.driver_data = (void *)&lenovo_yoga_tab2_830_1050_info,
},
+ {
+ /* Lenovo Yoga Tab 3 Pro YT3-X90F */
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Intel Corporation"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "CHERRYVIEW D1 PLATFORM"),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "Blade3-10A-001"),
+ },
+ .driver_data = (void *)&lenovo_yt3_info,
+ },
{
/* Medion Lifetab S10346 */
.matches = {
--
2.38.1
