| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <acpi/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; |
| struct acpi_gpio irq_gpio; |
| |
| /* I2C Bus Frequency in Hertz (default 400kHz) */ |
| unsigned int bus_speed; |
| |
| /* Enable jack detection via JKDET pin */ |
| unsigned int jkdet_enable; |
| |
| /* Enable JKDET pin pull if set, otherwise high impedance state */ |
| unsigned int jkdet_pull_enable; |
| |
| /* Pull-up JKDET pin if set, otherwise pull down */ |
| unsigned int jkdet_pull_up; |
| |
| /* JKDET pin polarity, 0 => active high, 1 => active low */ |
| unsigned int jkdet_polarity; |
| |
| /* |
| * VREF Impedance selection |
| * 0 - Open |
| * 1 - 25 kOhm |
| * 2 - 125 kOhm |
| * 3 - 2.5 kOhm |
| */ |
| unsigned int vref_impedance; |
| |
| /* Button impedance measurement hysteresis */ |
| unsigned int 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 int micbias_voltage; |
| unsigned int sar_voltage; |
| |
| /* |
| * SAR compare time |
| * 0 - 500 ns |
| * 1 - 1 us |
| * 2 - 2 us |
| * 3 - 4 us |
| */ |
| unsigned int sar_compare_time; |
| |
| /* |
| * SAR sampling time |
| * 0 - 2 us |
| * 1 - 4 us |
| * 2 - 8 us |
| * 3 - 16 us |
| */ |
| unsigned int sar_sampling_time; |
| |
| /* |
| * Button short key press debounce time |
| * 0 - 30 ms |
| * 1 - 50 ms |
| * 2 - 100 ms |
| * 3 - 30 ms |
| */ |
| unsigned int short_key_debounce; |
| |
| /* Debounce time 2^(n+2) ms (0-7) for jack insert */ |
| unsigned int jack_insert_debounce; |
| |
| /* Debounce time 2^(n+2) ms (0-7) for jack eject */ |
| unsigned int jack_eject_debounce; |
| |
| /* Number of buttons supported, up to 8 */ |
| unsigned int 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]; |
| }; |