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[ALSA] oxygen: reduce SPI clock frequency for AK4396/WM8785

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According to the datasheets, the SPI clock cycle must be at least 200 ns
for the AK4396 and the WM8785, so we cannot use the default 160 ns.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Clemens Ladisch 2008-01-21 08:51:19 +01:00 committed by Jaroslav Kysela
parent 71e22a4b77
commit 3b94253bc9
2 changed files with 3 additions and 3 deletions
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4
sound/pci/oxygen/oxygen.c
View file

@ -166,7 +166,7 @@ static void ak4396_write(struct oxygen *chip, unsigned int codec,
}; };
oxygen_write_spi(chip, OXYGEN_SPI_TRIGGER | oxygen_write_spi(chip, OXYGEN_SPI_TRIGGER |
OXYGEN_SPI_DATA_LENGTH_2 | OXYGEN_SPI_DATA_LENGTH_2 |
OXYGEN_SPI_CLOCK_160 | OXYGEN_SPI_CLOCK_320 |
(codec_spi_map[codec] << OXYGEN_SPI_CODEC_SHIFT) | (codec_spi_map[codec] << OXYGEN_SPI_CODEC_SHIFT) |
OXYGEN_SPI_CEN_LATCH_CLOCK_HI, OXYGEN_SPI_CEN_LATCH_CLOCK_HI,
AK4396_WRITE | (reg << 8) | value); AK4396_WRITE | (reg << 8) | value);
@ -176,7 +176,7 @@ static void wm8785_write(struct oxygen *chip, u8 reg, unsigned int value)
{ {
oxygen_write_spi(chip, OXYGEN_SPI_TRIGGER | oxygen_write_spi(chip, OXYGEN_SPI_TRIGGER |
OXYGEN_SPI_DATA_LENGTH_2 | OXYGEN_SPI_DATA_LENGTH_2 |
OXYGEN_SPI_CLOCK_160 | OXYGEN_SPI_CLOCK_320 |
(3 << OXYGEN_SPI_CODEC_SHIFT) | (3 << OXYGEN_SPI_CODEC_SHIFT) |
OXYGEN_SPI_CEN_LATCH_CLOCK_LO, OXYGEN_SPI_CEN_LATCH_CLOCK_LO,
(reg << 9) | value); (reg << 9) | value);

2
sound/pci/oxygen/oxygen_io.c
View file

@ -174,7 +174,7 @@ void oxygen_write_spi(struct oxygen *chip, u8 control, unsigned int data)
{ {
unsigned int count; unsigned int count;
/* should not need more than 3.84 us (24 * 160 ns) */ /* should not need more than 7.68 us (24 * 320 ns) */
count = 10; count = 10;
while ((oxygen_read8(chip, OXYGEN_SPI_CONTROL) & OXYGEN_SPI_BUSY) while ((oxygen_read8(chip, OXYGEN_SPI_CONTROL) & OXYGEN_SPI_BUSY)
&& count > 0) { && count > 0) {