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-rw-r--r--src/drivers/i2c/nau8825/chip.h96
1 files changed, 96 insertions, 0 deletions
diff --git a/src/drivers/i2c/nau8825/chip.h b/src/drivers/i2c/nau8825/chip.h
new file mode 100644
index 0000000000..e6c88bc4e7
--- /dev/null
+++ b/src/drivers/i2c/nau8825/chip.h
@@ -0,0 +1,96 @@
+#include <arch/acpi_device.h>
+
+#define NAU8825_MAX_BUTTONS 8
+
+/*
+ * Nuvoton NAU8825 audio codec devicetree bindings
+ * linux/Documentation/devicetree/bindings/sound/nau8825.txt
+ */
+struct drivers_i2c_nau8825_config {
+ /* Interrupt configuration */
+ struct acpi_irq irq;
+
+ /* I2C Bus Frequency in Hertz (default 400kHz) */
+ unsigned bus_speed;
+
+ /* Enable jack detection via JKDET pin */
+ unsigned jkdet_enable;
+
+ /* Enable JKDET pin pull if set, otherwise high impedance state */
+ unsigned jkdet_pull_enable;
+
+ /* Pull-up JKDET pin if set, otherwise pull down */
+ unsigned jkdet_pull_up;
+
+ /* JKDET pin polarity, 0 => active high, 1 => active low */
+ unsigned jkdet_polarity;
+
+ /*
+ * VREF Impedance selection
+ * 0 - Open
+ * 1 - 25 kOhm
+ * 2 - 125 kOhm
+ * 3 - 2.5 kOhm
+ */
+ unsigned vref_impedance;
+
+ /* Button impedance measurement hysteresis */
+ unsigned sar_hysteresis;
+
+ /*
+ * Reference voltage for button impedance measurement and micbias
+ * 0 - VDDA
+ * 1 - VDDA
+ * 2 - VDDA * 1.1
+ * 3 - VDDA * 1.2
+ * 4 - VDDA * 1.3
+ * 5 - VDDA * 1.4
+ * 6 - VDDA * 1.53
+ * 7 - VDDA * 1.53
+ */
+ unsigned micbias_voltage;
+ unsigned sar_voltage;
+
+ /*
+ * SAR compare time
+ * 0 - 500 ns
+ * 1 - 1 us
+ * 2 - 2 us
+ * 3 - 4 us
+ */
+ unsigned sar_compare_time;
+
+ /*
+ * SAR sampling time
+ * 0 - 2 us
+ * 1 - 4 us
+ * 2 - 8 us
+ * 3 - 16 us
+ */
+ unsigned sar_sampling_time;
+
+ /*
+ * Button short key press debounce time
+ * 0 - 30 ms
+ * 1 - 50 ms
+ * 2 - 100 ms
+ * 3 - 30 ms
+ */
+ unsigned short_key_debounce;
+
+ /* Debounce time 2^(n+2) ms (0-7) for jack insert */
+ unsigned jack_insert_debounce;
+
+ /* Debounce time 2^(n+2) ms (0-7) for jack eject */
+ unsigned jack_eject_debounce;
+
+ /* Number of buttons supported, up to 8 */
+ unsigned sar_threshold_num;
+
+ /*
+ * Impedance threshold for each button, up to 8
+ * SAR = 255 * micbias_voltage / sar_voltage * R / (2000 + R)
+ * R is Button impedance
+ */
+ uint64_t sar_threshold[NAU8825_MAX_BUTTONS];
+};