This will reduce the number of writes done on resume, allowing that to complete faster (especially on systems with very slow I2C like the current Samsung driver).
Signed-off-by: Mark Brown broonie@opensource.wolfsonmicro.com --- sound/soc/codecs/wm8753.c | 5 +++++ 1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/sound/soc/codecs/wm8753.c b/sound/soc/codecs/wm8753.c index bc29558..2241204 100644 --- a/sound/soc/codecs/wm8753.c +++ b/sound/soc/codecs/wm8753.c @@ -1526,6 +1526,11 @@ static int wm8753_resume(struct platform_device *pdev) for (i = 0; i < ARRAY_SIZE(wm8753_reg); i++) { if (i + 1 == WM8753_RESET) continue; + + /* No point in writing hardware default values back */ + if (cache[i] == wm8753_reg[i]) + continue; + data[0] = ((i + 1) << 1) | ((cache[i] >> 8) & 0x0001); data[1] = cache[i] & 0x00ff; codec->hw_write(codec->control_data, data, 2);