diff options
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/pci/oxygen/oxygen.h | 2 | ||||
| -rw-r--r-- | sound/pci/oxygen/oxygen_io.c | 17 |
2 files changed, 7 insertions, 12 deletions
diff --git a/sound/pci/oxygen/oxygen.h b/sound/pci/oxygen/oxygen.h index 09a24b24958..c10ab077afd 100644 --- a/sound/pci/oxygen/oxygen.h +++ b/sound/pci/oxygen/oxygen.h @@ -198,7 +198,7 @@ void oxygen_write_ac97(struct oxygen *chip, unsigned int codec, void oxygen_write_ac97_masked(struct oxygen *chip, unsigned int codec, unsigned int index, u16 data, u16 mask); -void oxygen_write_spi(struct oxygen *chip, u8 control, unsigned int data); +int oxygen_write_spi(struct oxygen *chip, u8 control, unsigned int data); void oxygen_write_i2c(struct oxygen *chip, u8 device, u8 map, u8 data); void oxygen_reset_uart(struct oxygen *chip); diff --git a/sound/pci/oxygen/oxygen_io.c b/sound/pci/oxygen/oxygen_io.c index 4b88c7a332e..3274907189f 100644 --- a/sound/pci/oxygen/oxygen_io.c +++ b/sound/pci/oxygen/oxygen_io.c @@ -212,23 +212,18 @@ static int oxygen_wait_spi(struct oxygen *chip) return -EIO; } -void oxygen_write_spi(struct oxygen *chip, u8 control, unsigned int data) +int oxygen_write_spi(struct oxygen *chip, u8 control, unsigned int data) { - unsigned int count; - - /* should not need more than 30.72 us (24 * 1.28 us) */ - count = 10; - while ((oxygen_read8(chip, OXYGEN_SPI_CONTROL) & OXYGEN_SPI_BUSY) - && count > 0) { - udelay(4); - --count; - } - + /* + * We need to wait AFTER initiating the SPI transaction, + * otherwise read operations will not work. + */ oxygen_write8(chip, OXYGEN_SPI_DATA1, data); oxygen_write8(chip, OXYGEN_SPI_DATA2, data >> 8); if (control & OXYGEN_SPI_DATA_LENGTH_3) oxygen_write8(chip, OXYGEN_SPI_DATA3, data >> 16); oxygen_write8(chip, OXYGEN_SPI_CONTROL, control); + return oxygen_wait_spi(chip); } EXPORT_SYMBOL(oxygen_write_spi); |