platform/x86: x86-android-tablets: Move Lenovo tablets to their own file (7bf974f6) · Commits · EulixOS / Software / Kernel

drivers/platform/x86/x86-android-tablets/Makefile

+2 −1

Original line number	Diff line number	Diff line
		@@ -5,4 +5,5 @@

		obj-$(CONFIG_X86_ANDROID_TABLETS) += x86-android-tablets.o

		x86-android-tablets-y := core.o dmi.o shared-psy-info.o asus.o x86-android-tablets-main.o
		x86-android-tablets-y := core.o dmi.o shared-psy-info.o \
		asus.o lenovo.o x86-android-tablets-main.o

drivers/platform/x86/x86-android-tablets/lenovo.c

0 → 100644

+419 −0

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0-or-later
		/*
		* Board info for Lenovo X86 tablets which ship with Android as the factory image
		* and which have broken DSDT tables. The factory kernels shipped on these
		* devices typically have a bunch of things hardcoded, rather than specified
		* in their DSDT.
		*
		* Copyright (C) 2021-2023 Hans de Goede <hdegoede@redhat.com>
		*/

		#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

		#include <linux/efi.h>
		#include <linux/gpio/machine.h>
		#include <linux/pinctrl/consumer.h>
		#include <linux/pinctrl/machine.h>
		#include <linux/platform_data/lp855x.h>
		#include <linux/platform_device.h>
		#include <linux/reboot.h>
		#include <linux/rmi.h>
		#include <linux/spi/spi.h>

		#include "shared-psy-info.h"
		#include "x86-android-tablets.h"

		/* Lenovo Yoga Book X90F / X91F / X91L need manual instantiation of the fg client */
		static const struct x86_i2c_client_info lenovo_yogabook_x9x_i2c_clients[] __initconst = {
		{
		/* BQ27542 fuel-gauge */
		.board_info = {
		.type = "bq27542",
		.addr = 0x55,
		.dev_name = "bq27542",
		.swnode = &fg_bq25890_supply_node,
		},
		.adapter_path = "\\_SB_.PCI0.I2C1",
		},
		};

		const struct x86_dev_info lenovo_yogabook_x9x_info __initconst = {
		.i2c_client_info = lenovo_yogabook_x9x_i2c_clients,
		.i2c_client_count = ARRAY_SIZE(lenovo_yogabook_x9x_i2c_clients),
		};

		/* Lenovo Yoga Tablet 2 1050F/L's Android factory img has everything hardcoded */
		static const struct property_entry lenovo_yoga_tab2_830_1050_bq24190_props[] = {
		PROPERTY_ENTRY_STRING_ARRAY_LEN("supplied-from", tusb1211_chg_det_psy, 1),
		PROPERTY_ENTRY_REF("monitored-battery", &generic_lipo_hv_4v35_battery_node),
		PROPERTY_ENTRY_BOOL("omit-battery-class"),
		PROPERTY_ENTRY_BOOL("disable-reset"),
		{ }
		};

		static const struct software_node lenovo_yoga_tab2_830_1050_bq24190_node = {
		.properties = lenovo_yoga_tab2_830_1050_bq24190_props,
		};

		/* This gets filled by lenovo_yoga_tab2_830_1050_init() */
		static struct rmi_device_platform_data lenovo_yoga_tab2_830_1050_rmi_pdata = { };

		static struct lp855x_platform_data lenovo_yoga_tab2_830_1050_lp8557_pdata = {
		.device_control = 0x86,
		.initial_brightness = 128,
		};

		static const struct x86_i2c_client_info lenovo_yoga_tab2_830_1050_i2c_clients[] __initconst = {
		{
		/* bq24292i battery charger */
		.board_info = {
		.type = "bq24190",
		.addr = 0x6b,
		.dev_name = "bq24292i",
		.swnode = &lenovo_yoga_tab2_830_1050_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_HIGH,
		},
		}, {
		/* BQ27541 fuel-gauge */
		.board_info = {
		.type = "bq27541",
		.addr = 0x55,
		.dev_name = "bq27541",
		.swnode = &fg_bq24190_supply_node,
		},
		.adapter_path = "\\_SB_.I2C1",
		}, {
		/* Synaptics RMI touchscreen */
		.board_info = {
		.type = "rmi4_i2c",
		.addr = 0x38,
		.dev_name = "rmi4_i2c",
		.platform_data = &lenovo_yoga_tab2_830_1050_rmi_pdata,
		},
		.adapter_path = "\\_SB_.I2C6",
		.irq_data = {
		.type = X86_ACPI_IRQ_TYPE_APIC,
		.index = 0x45,
		.trigger = ACPI_EDGE_SENSITIVE,
		.polarity = ACPI_ACTIVE_HIGH,
		},
		}, {
		/* LP8557 Backlight controller */
		.board_info = {
		.type = "lp8557",
		.addr = 0x2c,
		.dev_name = "lp8557",
		.platform_data = &lenovo_yoga_tab2_830_1050_lp8557_pdata,
		},
		.adapter_path = "\\_SB_.I2C3",
		},
		};

		static struct gpiod_lookup_table lenovo_yoga_tab2_830_1050_int3496_gpios = {
		.dev_id = "intel-int3496",
		.table = {
		GPIO_LOOKUP("INT33FC:02", 1, "mux", GPIO_ACTIVE_LOW),
		GPIO_LOOKUP("INT33FC:02", 24, "id", GPIO_ACTIVE_HIGH),
		{ }
		},
		};

		#define LENOVO_YOGA_TAB2_830_1050_CODEC_NAME "spi-10WM5102:00"

		static struct gpiod_lookup_table lenovo_yoga_tab2_830_1050_codec_gpios = {
		.dev_id = LENOVO_YOGA_TAB2_830_1050_CODEC_NAME,
		.table = {
		GPIO_LOOKUP("gpio_crystalcove", 3, "reset", GPIO_ACTIVE_HIGH),
		GPIO_LOOKUP("INT33FC:01", 23, "wlf,ldoena", GPIO_ACTIVE_HIGH),
		GPIO_LOOKUP("arizona", 2, "wlf,spkvdd-ena", GPIO_ACTIVE_HIGH),
		GPIO_LOOKUP("arizona", 4, "wlf,micd-pol", GPIO_ACTIVE_LOW),
		{ }
		},
		};

		static struct gpiod_lookup_table * const lenovo_yoga_tab2_830_1050_gpios[] = {
		&lenovo_yoga_tab2_830_1050_int3496_gpios,
		&lenovo_yoga_tab2_830_1050_codec_gpios,
		NULL
		};

		static int __init lenovo_yoga_tab2_830_1050_init(void);
		static void lenovo_yoga_tab2_830_1050_exit(void);

		struct x86_dev_info lenovo_yoga_tab2_830_1050_info __initdata = {
		.i2c_client_info = lenovo_yoga_tab2_830_1050_i2c_clients,
		/* i2c_client_count gets set by lenovo_yoga_tab2_830_1050_init() */
		.pdev_info = int3496_pdevs,
		.pdev_count = 1,
		.gpiod_lookup_tables = lenovo_yoga_tab2_830_1050_gpios,
		.bat_swnode = &generic_lipo_hv_4v35_battery_node,
		.modules = bq24190_modules,
		.init = lenovo_yoga_tab2_830_1050_init,
		.exit = lenovo_yoga_tab2_830_1050_exit,
		};

		/*
		* The Lenovo Yoga Tablet 2 830 and 1050 (8" vs 10") versions use the same
		* mainboard, but they need some different treatment related to the display:
		* 1. The 830 uses a portrait LCD panel with a landscape touchscreen, requiring
		* the touchscreen driver to adjust the touch-coords to match the LCD.
		* 2. Both use an TI LP8557 LED backlight controller. On the 1050 the LP8557's
		* PWM input is connected to the PMIC's PWM output and everything works fine
		* with the defaults programmed into the LP8557 by the BIOS.
		* But on the 830 the LP8557's PWM input is connected to a PWM output coming
		* from the LCD panel's controller. The Android code has a hack in the i915
		* driver to write the non-standard DSI reg 0x9f with the desired backlight
		* level to set the duty-cycle of the LCD's PWM output.
		*
		* To avoid having to have a similar hack in the mainline kernel the LP8557
		* entry in lenovo_yoga_tab2_830_1050_i2c_clients instead just programs the
		* LP8557 to directly set the level, ignoring the PWM input. This means that
		* the LP8557 i2c_client should only be instantiated on the 830.
		*/
		static int __init lenovo_yoga_tab2_830_1050_init_display(void)
		{
		struct gpio_desc *gpiod;
		int ret;

		/* Use PMIC GPIO 10 bootstrap pin to differentiate 830 vs 1050 */
		ret = x86_android_tablet_get_gpiod("gpio_crystalcove", 10, &gpiod);
		if (ret)
		return ret;

		ret = gpiod_get_value_cansleep(gpiod);
		if (ret) {
		pr_info("detected Lenovo Yoga Tablet 2 1050F/L\n");
		lenovo_yoga_tab2_830_1050_info.i2c_client_count =
		ARRAY_SIZE(lenovo_yoga_tab2_830_1050_i2c_clients) - 1;
		} else {
		pr_info("detected Lenovo Yoga Tablet 2 830F/L\n");
		lenovo_yoga_tab2_830_1050_rmi_pdata.sensor_pdata.axis_align.swap_axes = true;
		lenovo_yoga_tab2_830_1050_rmi_pdata.sensor_pdata.axis_align.flip_y = true;
		lenovo_yoga_tab2_830_1050_info.i2c_client_count =
		ARRAY_SIZE(lenovo_yoga_tab2_830_1050_i2c_clients);
		}

		return 0;
		}

		/* SUS (INT33FC:02) pin 6 needs to be configured as pmu_clk for the audio codec */
		static const struct pinctrl_map lenovo_yoga_tab2_830_1050_codec_pinctrl_map =
		PIN_MAP_MUX_GROUP(LENOVO_YOGA_TAB2_830_1050_CODEC_NAME, "codec_32khz_clk",
		"INT33FC:02", "pmu_clk2_grp", "pmu_clk");

		static struct pinctrl *lenovo_yoga_tab2_830_1050_codec_pinctrl;
		static struct sys_off_handler *lenovo_yoga_tab2_830_1050_sys_off_handler;

		static int __init lenovo_yoga_tab2_830_1050_init_codec(void)
		{
		struct device *codec_dev;
		struct pinctrl *pinctrl;
		int ret;

		codec_dev = bus_find_device_by_name(&spi_bus_type, NULL,
		LENOVO_YOGA_TAB2_830_1050_CODEC_NAME);
		if (!codec_dev) {
		pr_err("error cannot find %s device\n", LENOVO_YOGA_TAB2_830_1050_CODEC_NAME);
		return -ENODEV;
		}

		ret = pinctrl_register_mappings(&lenovo_yoga_tab2_830_1050_codec_pinctrl_map, 1);
		if (ret)
		goto err_put_device;

		pinctrl = pinctrl_get_select(codec_dev, "codec_32khz_clk");
		if (IS_ERR(pinctrl)) {
		ret = dev_err_probe(codec_dev, PTR_ERR(pinctrl), "selecting codec_32khz_clk\n");
		goto err_unregister_mappings;
		}

		/* We're done with the codec_dev now */
		put_device(codec_dev);

		lenovo_yoga_tab2_830_1050_codec_pinctrl = pinctrl;
		return 0;

		err_unregister_mappings:
		pinctrl_unregister_mappings(&lenovo_yoga_tab2_830_1050_codec_pinctrl_map);
		err_put_device:
		put_device(codec_dev);
		return ret;
		}

		/*
		* These tablet's DSDT does not set acpi_gbl_reduced_hardware, so acpi_power_off
		* gets used as pm_power_off handler. This causes "poweroff" on these tablets
		* to hang hard. Requiring pressing the powerbutton for 30 seconds twice
		* followed by a normal 3 second press to recover. Avoid this by doing an EFI
		* poweroff instead.
		*/
		static int lenovo_yoga_tab2_830_1050_power_off(struct sys_off_data *data)
		{
		efi.reset_system(EFI_RESET_SHUTDOWN, EFI_SUCCESS, 0, NULL);

		return NOTIFY_DONE;
		}

		static int __init lenovo_yoga_tab2_830_1050_init(void)
		{
		int ret;

		ret = lenovo_yoga_tab2_830_1050_init_display();
		if (ret)
		return ret;

		ret = lenovo_yoga_tab2_830_1050_init_codec();
		if (ret)
		return ret;

		/* SYS_OFF_PRIO_FIRMWARE + 1 so that it runs before acpi_power_off */
		lenovo_yoga_tab2_830_1050_sys_off_handler =
		register_sys_off_handler(SYS_OFF_MODE_POWER_OFF, SYS_OFF_PRIO_FIRMWARE + 1,
		lenovo_yoga_tab2_830_1050_power_off, NULL);
		if (IS_ERR(lenovo_yoga_tab2_830_1050_sys_off_handler))
		return PTR_ERR(lenovo_yoga_tab2_830_1050_sys_off_handler);

		return 0;
		}

		static void lenovo_yoga_tab2_830_1050_exit(void)
		{
		unregister_sys_off_handler(lenovo_yoga_tab2_830_1050_sys_off_handler);

		if (lenovo_yoga_tab2_830_1050_codec_pinctrl) {
		pinctrl_put(lenovo_yoga_tab2_830_1050_codec_pinctrl);
		pinctrl_unregister_mappings(&lenovo_yoga_tab2_830_1050_codec_pinctrl_map);
		}
		}

		/* 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;

		/*
		* The gpio_desc returned by x86_android_tablet_get_gpiod() is a "raw"
		* gpio_desc, that is there is no way to pass lookup-flags like
		* GPIO_ACTIVE_LOW. Set the GPIO to 0 here to enable charging since
		* the /CE pin is active-low, but not marked as such in the gpio_desc.
		*/
		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;
		}

		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,
		};

drivers/platform/x86/x86-android-tablets/x86-android-tablets-main.c

+1 −405

File changed.

Preview size limit exceeded, changes collapsed.