[PATCH 4/4] platform/x86: x86-android-tablets: Add audio codec info for Lenovo Yoga Tab 3 Pro YT3-X90F

[Hans de Goede <hdegoede@redhat.com>]

The SPI attached WM5102 codec on the Lenovo Yoga Tab 3 Pro YT3-X90F
is not described in the ACPI tables.

Add info to instantiate the SPI device for the codec manually.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 .../platform/x86/x86-android-tablets/lenovo.c | 99 +++++++++++++++++++
 1 file changed, 99 insertions(+)

diff --git a/drivers/platform/x86/x86-android-tablets/lenovo.c b/drivers/platform/x86/x86-android-tablets/lenovo.c
index 585f10a57810..d5d815940ce1 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>
@@ -677,6 +679,89 @@ static const struct x86_i2c_client_info lenovo_yt3_i2c_clients[] __initconst = {
 	}
 };
 
+/*
+ * 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_force_micbias = 1,
+	.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]={ /*MICBIAS3*/
+                 .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;
@@ -720,14 +805,28 @@ 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,
 };
-- 
2.41.0