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b8b1a4cb68
The driver was using an initial value for the clock on the SPI bus which was read from ICE1712 EEPROM, ice->eeprom.data[ICE_EEP1_GPIO_STATE] & ICE1712_DELTA_AP_CCLK (0x02) It appears some cards have it default high, some cards have it default low. On my Delta 66 rev. E: $ cat /proc/asound/M66/ice1712 | grep 'GPIO state' GPIO state : 0x70 /* ICE1712_DELTA_AP_CCLK bit is zero */ On my Audiophile 2496: $ cat /proc/asound/M2496/ice1712 | grep 'GPIO state' GPIO state : 0xfe /* ICE1712_DELTA_AP_CCLK bit is one */ It must be raised before the first SPI write happens, or the write will fail, leading to: [ 23.248721] invalid CS8427 signature 0x0: let me try again... I theorize that 4eb4550ab37d351ab0973ccec921a5a2d8560ec7 is no longer needed, it was a different way to workaround the problem. [fixed variable decleration by tiwai] Signed-off-by: Brian Bloniarz <brian.bloniarz@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>