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mfd: arizona: Mark additional registers as volatile

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Mark some additional registers as volatile. The write sequencer control
registers should not be cached, as we don't ever want their value
synchronised as this might cause a write sequence to be accidentally
initiated.

Additionally, the DAC_COMP registers require special preconditions to
write so there values wouldn't be updated accurately during a register
sync.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Charles Keepax
2014-08-13 11:42:47 +01:00
committed by Lee Jones
parent 48018943eb
commit e569d937af
2 changed files with 11 additions and 6 deletions
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6
drivers/mfd/wm5110-tables.c
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@@ -666,9 +666,6 @@ static const struct reg_default wm5110_reg_default[] = {
{ 0x0000000A, 0x0001 }, /* R10 - Ctrl IF I2C2 CFG 1 */
{ 0x0000000B, 0x0036 }, /* R11 - Ctrl IF I2C1 CFG 2 */
{ 0x0000000C, 0x0036 }, /* R12 - Ctrl IF I2C2 CFG 2 */
{ 0x00000016, 0x0000 }, /* R22 - Write Sequencer Ctrl 0 */
{ 0x00000017, 0x0000 }, /* R23 - Write Sequencer Ctrl 1 */
{ 0x00000018, 0x0000 }, /* R24 - Write Sequencer Ctrl 2 */
{ 0x00000020, 0x0000 }, /* R32 - Tone Generator 1 */
{ 0x00000021, 0x1000 }, /* R33 - Tone Generator 2 */
{ 0x00000022, 0x0000 }, /* R34 - Tone Generator 3 */
@@ -2815,6 +2812,9 @@ static bool wm5110_volatile_register(struct device *dev, unsigned int reg)
switch (reg) {
case ARIZONA_SOFTWARE_RESET:
case ARIZONA_DEVICE_REVISION:
case ARIZONA_WRITE_SEQUENCER_CTRL_0:
case ARIZONA_WRITE_SEQUENCER_CTRL_1:
case ARIZONA_WRITE_SEQUENCER_CTRL_2:
case ARIZONA_HAPTICS_STATUS:
case ARIZONA_SAMPLE_RATE_1_STATUS:
case ARIZONA_SAMPLE_RATE_2_STATUS: