+ * power management
+ */
+#ifdef CONFIG_PM
+void snd_ak4531_suspend(struct snd_ak4531 *ak4531)
+{
+ /* mute */
+ ak4531->write(ak4531, AK4531_LMASTER, 0x9f);
+ ak4531->write(ak4531, AK4531_RMASTER, 0x9f);
+ /* powerdown */
+ ak4531->write(ak4531, AK4531_RESET, 0x01);
+}
+
+void snd_ak4531_resume(struct snd_ak4531 *ak4531)
+{
+ int idx;
+
+ /* initialize */
+ ak4531->write(ak4531, AK4531_RESET, 0x03);
+ udelay(100);
+ ak4531->write(ak4531, AK4531_CLOCK, 0x00);
+ /* restore mixer registers */
+ for (idx = 0; idx <= 0x19; idx++) {
+ if (idx == AK4531_RESET || idx == AK4531_CLOCK)
+ continue;
+ ak4531->write(ak4531, idx, ak4531->regs[idx]);
+ }
+}
+#endif