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-rw-r--r--sound/pci/oxygen/oxygen.h2
-rw-r--r--sound/pci/oxygen/oxygen_io.c17
2 files changed, 7 insertions, 12 deletions
diff --git a/sound/pci/oxygen/oxygen.h b/sound/pci/oxygen/oxygen.h
index 09a24b24958b..c10ab077afd8 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 4b88c7a332e4..3274907189fe 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);