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Commit 3b94253b authored by Clemens Ladisch's avatar Clemens Ladisch Committed by Jaroslav Kysela
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[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: default avatarClemens Ladisch <clemens@ladisch.de>
Signed-off-by: default avatarJaroslav Kysela <perex@perex.cz>
parent 71e22a4b

sound/pci/oxygen/oxygen.c

+2 −2
Original line number Diff line number Diff line
@@ -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);

sound/pci/oxygen/oxygen_io.c

+1 −1
Original line number Diff line number Diff line
@@ -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) {