From: Hans de Goede Date: Sat, 20 Sep 2025 20:07:10 +0000 (+0200) Subject: platform/x86: x86-android-tablets: Add support for Acer A1-840 tablet X-Git-Tag: v6.18-rc1~82^2~6 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6564d3e1a46b12990a02dafa948b311a45bc4991;p=thirdparty%2Fkernel%2Flinux.git platform/x86: x86-android-tablets: Add support for Acer A1-840 tablet Add support for the Acer Iconia One 8 A1-840 (non FHD version) tablet. This tablet has the usual issues for tablets shipped with Android as factory OS. The DSDT is broken in various ways, so i2c_clients for various devices as well as the INT3496 platform-device for OTG extcon handling need to be instantiated manually by x86-android-tablets. This tablet is special in that it is the first time a Bay Trail device has been found to use the Dollar Cove TI PMIC and the first time that the PMIC's Coulomb Counter is used as fuel-gauge. So far this PMIC has only been used together with Cherry Trail SoCs and always in combination with a separate full-featured fuel-gauge IC. Reviewed-by: Andy Shevchenko Signed-off-by: Hans de Goede Link: https://patch.msgid.link/20250920200713.20193-18-hansg@kernel.org Signed-off-by: Ilpo Järvinen --- diff --git a/drivers/platform/x86/x86-android-tablets/acer.c b/drivers/platform/x86/x86-android-tablets/acer.c index e5850da8037aa..d48c70ffd9925 100644 --- a/drivers/platform/x86/x86-android-tablets/acer.c +++ b/drivers/platform/x86/x86-android-tablets/acer.c @@ -16,6 +16,166 @@ #include "shared-psy-info.h" #include "x86-android-tablets.h" +/* Acer Iconia One 8 A1-840 (non FHD version) */ +static const struct property_entry acer_a1_840_bq24190_props[] = { + PROPERTY_ENTRY_REF("monitored-battery", &generic_lipo_4v2_battery_node), + PROPERTY_ENTRY_BOOL("omit-battery-class"), + PROPERTY_ENTRY_BOOL("disable-reset"), + { } +}; + +static const struct software_node acer_a1_840_bq24190_node = { + .properties = acer_a1_840_bq24190_props, +}; + +static const struct property_entry acer_a1_840_touchscreen_props[] = { + PROPERTY_ENTRY_U32("touchscreen-size-x", 800), + PROPERTY_ENTRY_U32("touchscreen-size-y", 1280), + PROPERTY_ENTRY_GPIO("reset-gpios", &baytrail_gpiochip_nodes[1], 26, GPIO_ACTIVE_LOW), + { } +}; + +static const struct software_node acer_a1_840_touchscreen_node = { + .properties = acer_a1_840_touchscreen_props, +}; + +static const struct x86_i2c_client_info acer_a1_840_i2c_clients[] __initconst = { + { + /* BQ24297 charger IC */ + .board_info = { + .type = "bq24297", + .addr = 0x6b, + .dev_name = "bq24297", + .swnode = &acer_a1_840_bq24190_node, + .platform_data = &bq24190_pdata, + }, + .adapter_path = "\\_SB_.I2C1", + .irq_data = { + .type = X86_ACPI_IRQ_TYPE_GPIOINT, + .chip = "INT33FC:02", + .index = 2, + .trigger = ACPI_EDGE_SENSITIVE, + .polarity = ACPI_ACTIVE_LOW, + .con_id = "bq24297_irq", + }, + }, { + /* MPU6515 sensors */ + .board_info = { + .type = "mpu6515", + .addr = 0x69, + .dev_name = "mpu6515", + }, + .adapter_path = "\\_SB_.I2C3", + .irq_data = { + .type = X86_ACPI_IRQ_TYPE_APIC, + .index = 0x47, + .trigger = ACPI_EDGE_SENSITIVE, + .polarity = ACPI_ACTIVE_HIGH, + }, + }, { + /* FT5416 touchscreen controller */ + .board_info = { + .type = "edt-ft5x06", + .addr = 0x38, + .dev_name = "ft5416", + .swnode = &acer_a1_840_touchscreen_node, + }, + .adapter_path = "\\_SB_.I2C4", + .irq_data = { + .type = X86_ACPI_IRQ_TYPE_APIC, + .index = 0x45, + .trigger = ACPI_EDGE_SENSITIVE, + .polarity = ACPI_ACTIVE_HIGH, + }, + } +}; + +static const struct property_entry acer_a1_840_int3496_props[] __initconst = { + PROPERTY_ENTRY_GPIO("mux-gpios", &baytrail_gpiochip_nodes[2], 1, GPIO_ACTIVE_HIGH), + PROPERTY_ENTRY_GPIO("id-gpios", &baytrail_gpiochip_nodes[2], 18, GPIO_ACTIVE_HIGH), + { } +}; + +static const struct platform_device_info acer_a1_840_pdevs[] __initconst = { + { + /* For micro USB ID pin handling */ + .name = "intel-int3496", + .id = PLATFORM_DEVID_NONE, + .properties = acer_a1_840_int3496_props, + }, +}; + +/* Properties for the Dollar Cove TI PMIC battery MFD child used as fuel-gauge */ +static const struct property_entry acer_a1_840_fg_props[] = { + PROPERTY_ENTRY_REF("monitored-battery", &generic_lipo_4v2_battery_node), + PROPERTY_ENTRY_STRING_ARRAY_LEN("supplied-from", bq24190_psy, 1), + PROPERTY_ENTRY_GPIO("charged-gpios", &baytrail_gpiochip_nodes[2], 10, GPIO_ACTIVE_HIGH), + { } +}; + +static struct device *acer_a1_840_fg_dev; +static struct fwnode_handle *acer_a1_840_fg_node; + +static int __init acer_a1_840_init(struct device *dev) +{ + int ret; + + acer_a1_840_fg_dev = bus_find_device_by_name(&platform_bus_type, NULL, "chtdc_ti_battery"); + if (!acer_a1_840_fg_dev) + return dev_err_probe(dev, -EPROBE_DEFER, "getting chtdc_ti_battery dev\n"); + + acer_a1_840_fg_node = fwnode_create_software_node(acer_a1_840_fg_props, NULL); + if (IS_ERR(acer_a1_840_fg_node)) { + ret = PTR_ERR(acer_a1_840_fg_node); + goto err_put; + } + + ret = device_add_software_node(acer_a1_840_fg_dev, + to_software_node(acer_a1_840_fg_node)); + if (ret) + goto err_put; + + return 0; + +err_put: + fwnode_handle_put(acer_a1_840_fg_node); + acer_a1_840_fg_node = NULL; + put_device(acer_a1_840_fg_dev); + acer_a1_840_fg_dev = NULL; + return ret; +} + +static void acer_a1_840_exit(void) +{ + device_remove_software_node(acer_a1_840_fg_dev); + /* + * Skip fwnode_handle_put(acer_a1_840_fg_node), instead leak the node. + * The intel_dc_ti_battery driver may still reference the strdup-ed + * "supplied-from" string. This string will be free-ed if the node + * is released. + */ + acer_a1_840_fg_node = NULL; + put_device(acer_a1_840_fg_dev); + acer_a1_840_fg_dev = NULL; +} + +static const char * const acer_a1_840_modules[] __initconst = { + "bq24190_charger", /* For the Vbus regulator for intel-int3496 */ + NULL +}; + +const struct x86_dev_info acer_a1_840_info __initconst = { + .i2c_client_info = acer_a1_840_i2c_clients, + .i2c_client_count = ARRAY_SIZE(acer_a1_840_i2c_clients), + .pdev_info = acer_a1_840_pdevs, + .pdev_count = ARRAY_SIZE(acer_a1_840_pdevs), + .gpiochip_type = X86_GPIOCHIP_BAYTRAIL, + .swnode_group = generic_lipo_4v2_battery_swnodes, + .modules = acer_a1_840_modules, + .init = acer_a1_840_init, + .exit = acer_a1_840_exit, +}; + /* Acer Iconia One 7 B1-750 has an Android factory image with everything hardcoded */ static const char * const acer_b1_750_mount_matrix[] = { "-1", "0", "0", diff --git a/drivers/platform/x86/x86-android-tablets/dmi.c b/drivers/platform/x86/x86-android-tablets/dmi.c index ebba7400d5c91..4a5720d6fc1d4 100644 --- a/drivers/platform/x86/x86-android-tablets/dmi.c +++ b/drivers/platform/x86/x86-android-tablets/dmi.c @@ -16,6 +16,16 @@ #include "x86-android-tablets.h" const struct dmi_system_id x86_android_tablet_ids[] __initconst = { + { + /* Acer Iconia One 8 A1-840 (non FHD version) */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Insyde"), + DMI_MATCH(DMI_PRODUCT_NAME, "BayTrail"), + /* Above strings are too generic also match BIOS date */ + DMI_MATCH(DMI_BIOS_DATE, "04/01/2014"), + }, + .driver_data = (void *)&acer_a1_840_info, + }, { /* Acer Iconia One 7 B1-750 */ .matches = { diff --git a/drivers/platform/x86/x86-android-tablets/x86-android-tablets.h b/drivers/platform/x86/x86-android-tablets/x86-android-tablets.h index 8e7d04bcb3f84..2498390958ad4 100644 --- a/drivers/platform/x86/x86-android-tablets/x86-android-tablets.h +++ b/drivers/platform/x86/x86-android-tablets/x86-android-tablets.h @@ -111,6 +111,7 @@ extern const struct software_node cherryview_gpiochip_nodes[]; * Extern declarations of x86_dev_info structs so there can be a single * MODULE_DEVICE_TABLE(dmi, ...), while splitting the board descriptions. */ +extern const struct x86_dev_info acer_a1_840_info; extern const struct x86_dev_info acer_b1_750_info; extern const struct x86_dev_info advantech_mica_071_info; extern const struct x86_dev_info asus_me176c_info;