mfd: wm5110: Set DCVDD voltage to 1.175V before entering sleep mode
The low power sleep mode on wm5110 requires that the LDO1 regulator be
set to 1.175V prior to entering sleep, then returned to 1.2V after
exiting sleep mode. This patch apply these regulator settings.
Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Acked-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c
index c80ab79..93024ac 100644
--- a/drivers/mfd/arizona-core.c
+++ b/drivers/mfd/arizona-core.c
@@ -478,6 +478,37 @@
goto err;
}
break;
+ case WM5110:
+ case WM8280:
+ ret = arizona_wait_for_boot(arizona);
+ if (ret)
+ goto err;
+
+ if (arizona->external_dcvdd) {
+ ret = regmap_update_bits(arizona->regmap,
+ ARIZONA_ISOLATION_CONTROL,
+ ARIZONA_ISOLATE_DCVDD1, 0);
+ if (ret) {
+ dev_err(arizona->dev,
+ "Failed to connect DCVDD: %d\n", ret);
+ goto err;
+ }
+ } else {
+ /*
+ * As this is only called for the internal regulator
+ * (where we know voltage ranges available) it is ok
+ * to request an exact range.
+ */
+ ret = regulator_set_voltage(arizona->dcvdd,
+ 1200000, 1200000);
+ if (ret < 0) {
+ dev_err(arizona->dev,
+ "Failed to set resume voltage: %d\n",
+ ret);
+ goto err;
+ }
+ }
+ break;
default:
ret = arizona_wait_for_boot(arizona);
if (ret != 0) {
@@ -528,6 +559,27 @@
ret);
return ret;
}
+ } else {
+ switch (arizona->type) {
+ case WM5110:
+ case WM8280:
+ /*
+ * As this is only called for the internal regulator
+ * (where we know voltage ranges available) it is ok
+ * to request an exact range.
+ */
+ ret = regulator_set_voltage(arizona->dcvdd,
+ 1175000, 1175000);
+ if (ret < 0) {
+ dev_err(arizona->dev,
+ "Failed to set suspend voltage: %d\n",
+ ret);
+ return ret;
+ }
+ break;
+ default:
+ break;
+ }
}
regcache_cache_only(arizona->regmap, true);