diff options
Diffstat (limited to 'drivers/platform/x86/x86-android-tablets/lenovo.c')
| -rw-r--r-- | drivers/platform/x86/x86-android-tablets/lenovo.c | 124 |
1 files changed, 120 insertions, 4 deletions
diff --git a/drivers/platform/x86/x86-android-tablets/lenovo.c b/drivers/platform/x86/x86-android-tablets/lenovo.c index c1e68211283f..f1c66a61bfc5 100644 --- a/drivers/platform/x86/x86-android-tablets/lenovo.c +++ b/drivers/platform/x86/x86-android-tablets/lenovo.c @@ -12,6 +12,8 @@ #include <linux/efi.h> #include <linux/gpio/machine.h> +#include <linux/mfd/arizona/pdata.h> +#include <linux/mfd/arizona/registers.h> #include <linux/mfd/intel_soc_pmic.h> #include <linux/pinctrl/consumer.h> #include <linux/pinctrl/machine.h> @@ -32,12 +34,30 @@ * * To avoid having to have a similar hack in the mainline kernel program the * LP8557 to directly set the level and use the lp855x_bl driver for control. + * + * The LP8557 can either be configured to multiply its PWM input and + * the I2C register set level (requiring both to be at 100% for 100% output); + * or to only take the I2C register set level into account. + * + * Multiplying the 2 levels is useful because this will turn off the backlight + * when the panel goes off and turns off its PWM output. + * + * But on some models the panel's PWM output defaults to a duty-cycle of + * much less then 100%, severely limiting max brightness. In this case + * the LP8557 should be configured to only take the I2C register into + * account and the i915 driver must turn off the panel and the backlight + * separately using e.g. VBT MIPI sequences to turn off the backlight. */ -static struct lp855x_platform_data lenovo_lp8557_pdata = { +static struct lp855x_platform_data lenovo_lp8557_pwm_and_reg_pdata = { .device_control = 0x86, .initial_brightness = 128, }; +static struct lp855x_platform_data lenovo_lp8557_reg_only_pdata = { + .device_control = 0x85, + .initial_brightness = 128, +}; + /* Lenovo Yoga Book X90F / X90L's Android factory img has everything hardcoded */ static const struct property_entry lenovo_yb1_x90_wacom_props[] = { @@ -120,7 +140,7 @@ static const struct x86_i2c_client_info lenovo_yb1_x90_i2c_clients[] __initconst .type = "lp8557", .addr = 0x2c, .dev_name = "lp8557", - .platform_data = &lenovo_lp8557_pdata, + .platform_data = &lenovo_lp8557_pwm_and_reg_pdata, }, .adapter_path = "\\_SB_.PCI0.I2C4", }, { @@ -356,7 +376,7 @@ static struct x86_i2c_client_info lenovo_yoga_tab2_830_1050_i2c_clients[] __init .type = "lp8557", .addr = 0x2c, .dev_name = "lp8557", - .platform_data = &lenovo_lp8557_pdata, + .platform_data = &lenovo_lp8557_pwm_and_reg_pdata, }, .adapter_path = "\\_SB_.I2C3", }, @@ -653,12 +673,94 @@ static const struct x86_i2c_client_info lenovo_yt3_i2c_clients[] __initconst = { .type = "lp8557", .addr = 0x2c, .dev_name = "lp8557", - .platform_data = &lenovo_lp8557_pdata, + .platform_data = &lenovo_lp8557_reg_only_pdata, }, .adapter_path = "\\_SB_.PCI0.I2C1", } }; +/* + * The AOSP 3.5 mm Headset: Accessory Specification gives the following values: + * Function A Play/Pause: 0 ohm + * Function D Voice assistant: 135 ohm + * Function B Volume Up 240 ohm + * Function C Volume Down 470 ohm + * Minimum Mic DC resistance 1000 ohm + * Minimum Ear speaker impedance 16 ohm + * Note the first max value below must be less then the min. speaker impedance, + * to allow CTIA/OMTP detection to work. The other max values are the closest + * value from extcon-arizona.c:arizona_micd_levels halfway 2 button resistances. + */ +static const struct arizona_micd_range arizona_micd_aosp_ranges[] = { + { .max = 11, .key = KEY_PLAYPAUSE }, + { .max = 186, .key = KEY_VOICECOMMAND }, + { .max = 348, .key = KEY_VOLUMEUP }, + { .max = 752, .key = KEY_VOLUMEDOWN }, +}; + +/* YT3 WM5102 arizona_micd_config comes from Android kernel sources */ +static struct arizona_micd_config lenovo_yt3_wm5102_micd_config[] = { + { 0, 1, 0 }, + { ARIZONA_ACCDET_SRC, 2, 1 }, +}; + +static struct arizona_pdata lenovo_yt3_wm5102_pdata = { + .irq_flags = IRQF_TRIGGER_LOW, + .micd_detect_debounce = 200, + .micd_ranges = arizona_micd_aosp_ranges, + .num_micd_ranges = ARRAY_SIZE(arizona_micd_aosp_ranges), + .hpdet_channel = ARIZONA_ACCDET_MODE_HPL, + + /* Below settings come from Android kernel sources */ + .micd_bias_start_time = 1, + .micd_rate = 6, + .micd_configs = lenovo_yt3_wm5102_micd_config, + .num_micd_configs = ARRAY_SIZE(lenovo_yt3_wm5102_micd_config), + .micbias = { + [0] = { /* MICBIAS1 */ + .mV = 2800, + .ext_cap = 1, + .discharge = 1, + .soft_start = 0, + .bypass = 0, + }, + [1] = { /* MICBIAS2 */ + .mV = 2800, + .ext_cap = 1, + .discharge = 1, + .soft_start = 0, + .bypass = 0, + }, + [2] = { /* MICBIAS2 */ + .mV = 2800, + .ext_cap = 1, + .discharge = 1, + .soft_start = 0, + .bypass = 0, + }, + }, +}; + +static const struct x86_spi_dev_info lenovo_yt3_spi_devs[] __initconst = { + { + /* WM5102 codec */ + .board_info = { + .modalias = "wm5102", + .platform_data = &lenovo_yt3_wm5102_pdata, + .max_speed_hz = 5000000, + }, + .ctrl_path = "\\_SB_.PCI0.SPI1", + .irq_data = { + .type = X86_ACPI_IRQ_TYPE_GPIOINT, + .chip = "INT33FF:00", + .index = 91, + .trigger = ACPI_LEVEL_SENSITIVE, + .polarity = ACPI_ACTIVE_LOW, + .con_id = "wm5102_irq", + }, + } +}; + static int __init lenovo_yt3_init(void) { int ret; @@ -702,14 +804,28 @@ static struct gpiod_lookup_table lenovo_yt3_hideep_gpios = { }, }; +static struct gpiod_lookup_table lenovo_yt3_wm5102_gpios = { + .dev_id = "spi1.0", + .table = { + GPIO_LOOKUP("INT33FF:00", 75, "wlf,spkvdd-ena", GPIO_ACTIVE_HIGH), + GPIO_LOOKUP("INT33FF:00", 81, "wlf,ldoena", GPIO_ACTIVE_HIGH), + GPIO_LOOKUP("INT33FF:00", 82, "reset", GPIO_ACTIVE_HIGH), + GPIO_LOOKUP("arizona", 2, "wlf,micd-pol", GPIO_ACTIVE_HIGH), + { } + }, +}; + static struct gpiod_lookup_table * const lenovo_yt3_gpios[] = { &lenovo_yt3_hideep_gpios, + &lenovo_yt3_wm5102_gpios, NULL }; 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), + .spi_dev_info = lenovo_yt3_spi_devs, + .spi_dev_count = ARRAY_SIZE(lenovo_yt3_spi_devs), .gpiod_lookup_tables = lenovo_yt3_gpios, .init = lenovo_yt3_init, }; |