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

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>

diff --git a/sound/pci/oxygen/oxygen.c b/sound/pci/oxygen/oxygen.c
index 0a7c613..35b2601 100644 (file)
--- a/sound/pci/oxygen/oxygen.c
+++ b/sound/pci/oxygen/oxygen.c
@@ -166,7 +166,7 @@ static void ak4396_write(struct oxygen *chip, unsigned int codec,
        };
        oxygen_write_spi(chip, OXYGEN_SPI_TRIGGER |
                         OXYGEN_SPI_DATA_LENGTH_2 |
-                        OXYGEN_SPI_CLOCK_160 |
+                        OXYGEN_SPI_CLOCK_320 |
                         (codec_spi_map[codec] << OXYGEN_SPI_CODEC_SHIFT) |
                         OXYGEN_SPI_CEN_LATCH_CLOCK_HI,
                         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_SPI_DATA_LENGTH_2 |
-                        OXYGEN_SPI_CLOCK_160 |
+                        OXYGEN_SPI_CLOCK_320 |
                         (3 << OXYGEN_SPI_CODEC_SHIFT) |
                         OXYGEN_SPI_CEN_LATCH_CLOCK_LO,
                         (reg << 9) | value);

diff --git a/sound/pci/oxygen/oxygen_io.c b/sound/pci/oxygen/oxygen_io.c
index ebafc65..d0cdce0 100644 (file)
--- a/sound/pci/oxygen/oxygen_io.c
+++ b/sound/pci/oxygen/oxygen_io.c
@@ -174,7 +174,7 @@ void oxygen_write_spi(struct oxygen *chip, u8 control, unsigned int data)
 {
        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;
        while ((oxygen_read8(chip, OXYGEN_SPI_CONTROL) & OXYGEN_SPI_BUSY)
               && count > 0) {