Now that regmap_read_bypassed() has been added to the kernel it is preferable to wake the device with a read rather than a write as the utility function can be called at a time before the device has been identified.

Signed-off-by: Simon Trimmer simont@opensource.cirrus.com --- sound/soc/codecs/cs35l56-shared.c | 19 +++++-------------- 1 file changed, 5 insertions(+), 14 deletions(-)

diff --git a/sound/soc/codecs/cs35l56-shared.c b/sound/soc/codecs/cs35l56-shared.c index e7e8d617da94..91b3c1c8575c 100644 --- a/sound/soc/codecs/cs35l56-shared.c +++ b/sound/soc/codecs/cs35l56-shared.c @@ -450,32 +450,23 @@ static const struct reg_sequence cs35l56_hibernate_seq[] = { REG_SEQ0(CS35L56_DSP_VIRTUAL1_MBOX_1, CS35L56_MBOX_CMD_ALLOW_AUTO_HIBERNATE), };

-static const struct reg_sequence cs35l56_hibernate_wake_seq[] = { - REG_SEQ0(CS35L56_DSP_VIRTUAL1_MBOX_1, CS35L56_MBOX_CMD_WAKEUP), -}; - static void cs35l56_issue_wake_event(struct cs35l56_base *cs35l56_base) { + unsigned int val; + /* * Dummy transactions to trigger I2C/SPI auto-wake. Issue two * transactions to meet the minimum required time from the rising edge * to the last falling edge of wake. * - * It uses bypassed write because we must wake the chip before + * It uses bypassed read because we must wake the chip before * disabling regmap cache-only. - * - * This can NAK on I2C which will terminate the write sequence so the - * single-write sequence is issued twice. */ - regmap_multi_reg_write_bypassed(cs35l56_base->regmap, - cs35l56_hibernate_wake_seq, - ARRAY_SIZE(cs35l56_hibernate_wake_seq)); + regmap_read_bypassed(cs35l56_base->regmap, CS35L56_IRQ1_STATUS, &val);

usleep_range(CS35L56_WAKE_HOLD_TIME_US, 2 * CS35L56_WAKE_HOLD_TIME_US);

- regmap_multi_reg_write_bypassed(cs35l56_base->regmap, - cs35l56_hibernate_wake_seq, - ARRAY_SIZE(cs35l56_hibernate_wake_seq)); + regmap_read_bypassed(cs35l56_base->regmap, CS35L56_IRQ1_STATUS, &val);

cs35l56_wait_control_port_ready(); }