diff options
| author | Harin Lee <me@harin.net> | 2025-11-25 03:04:57 +0900 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2025-11-25 08:02:16 +0100 |
| commit | 4b490e0d103cbd353bb136d67a6cdb0e94558a85 (patch) | |
| tree | 3ad24853a93214d5d096ce57e0457aad99b273bc | |
| parent | 5ebd054272718334c543998a6d0b77a9846c16d9 (diff) | |
ALSA: ctxfi: Add ADC helper functions for GPIO
Add helper functions hw_adc_stop(), hw_adc_start(), and hw_adc_reset()
to encapsulate ADC reset sequence operations. These functions reduce
duplication by centralizing the GPIO-based ADC control logic.
Signed-off-by: Harin Lee <me@harin.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://patch.msgid.link/20251124180501.2760421-3-me@harin.net
| -rw-r--r-- | sound/pci/ctxfi/cthw20k2.c | 37 |
1 files changed, 28 insertions, 9 deletions
diff --git a/sound/pci/ctxfi/cthw20k2.c b/sound/pci/ctxfi/cthw20k2.c index 1a085e7e5786..5d39bc943648 100644 --- a/sound/pci/ctxfi/cthw20k2.c +++ b/sound/pci/ctxfi/cthw20k2.c @@ -1826,6 +1826,32 @@ static int hw_adc_input_select(struct hw *hw, enum ADCSRC type) return 0; } +static void hw_adc_stop(struct hw *hw) +{ + u32 data; + /* Reset the ADC (reset is active low). */ + data = hw_read_20kx(hw, GPIO_DATA); + data &= ~(0x1 << 15); + hw_write_20kx(hw, GPIO_DATA, data); + usleep_range(10000, 11000); +} + +static void hw_adc_start(struct hw *hw) +{ + u32 data; + /* Return the ADC to normal operation. */ + data = hw_read_20kx(hw, GPIO_DATA); + data |= (0x1 << 15); + hw_write_20kx(hw, GPIO_DATA, data); + msleep(50); +} + +static void __maybe_unused hw_adc_reset(struct hw *hw) +{ + hw_adc_stop(hw); + hw_adc_start(hw); +} + static int hw_adc_init(struct hw *hw, const struct adc_conf *info) { int err; @@ -1843,10 +1869,7 @@ static int hw_adc_init(struct hw *hw, const struct adc_conf *info) goto error; } - /* Reset the ADC (reset is active low). */ - data = hw_read_20kx(hw, GPIO_DATA); - data &= ~(0x1 << 15); - hw_write_20kx(hw, GPIO_DATA, data); + hw_adc_stop(hw); if (hw->model == CTSB1270) { /* Set up the PCM4220 ADC on Titanium HD */ @@ -1860,11 +1883,7 @@ static int hw_adc_init(struct hw *hw, const struct adc_conf *info) hw_write_20kx(hw, GPIO_DATA, data); } - usleep_range(10000, 11000); - /* Return the ADC to normal operation. */ - data |= (0x1 << 15); - hw_write_20kx(hw, GPIO_DATA, data); - msleep(50); + hw_adc_start(hw); /* I2C write to register offset 0x0B to set ADC LRCLK polarity */ /* invert bit, interface format to I2S, word length to 24-bit, */ |