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authorRichard Fitzgerald <rf@opensource.wolfsonmicro.com>2015-10-02 13:29:10 +0100
committerLee Jones <lee.jones@linaro.org>2015-10-30 17:20:13 +0000
commite7811147aafb3d6364b8d60223cbe6c323cdf725 (patch)
tree85645af49ee68389f533790f37ae37171d2872e6 /drivers/mfd
parent18eb3f041addcdf8ef4a4b80547a67557c8826d6 (diff)
downloadlinux-e7811147aafb3d6364b8d60223cbe6c323cdf725.tar.bz2
mfd: arizona: Factor out DCVDD isolation control
Currently DCVDD isolation is enabled and disabled for runtime_suspend and runtime_resume. Future codecs will not have the isolation control so to prepare for these codecs this patch factors out the isolation control allowing it to be called as needed in the existing codec-specific switch cases. Signed-off-by: Richard Fitzgerald <rf@opensource.wolfsonmicro.com> Acked-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'drivers/mfd')
-rw-r--r--drivers/mfd/arizona-core.c108
1 files changed, 62 insertions, 46 deletions
diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c
index acf354875338..29be2628352c 100644
--- a/drivers/mfd/arizona-core.c
+++ b/drivers/mfd/arizona-core.c
@@ -460,6 +460,33 @@ static int wm5102_clear_write_sequencer(struct arizona *arizona)
}
#ifdef CONFIG_PM
+static int arizona_isolate_dcvdd(struct arizona *arizona)
+{
+ int ret;
+
+ ret = regmap_update_bits(arizona->regmap,
+ ARIZONA_ISOLATION_CONTROL,
+ ARIZONA_ISOLATE_DCVDD1,
+ ARIZONA_ISOLATE_DCVDD1);
+ if (ret != 0)
+ dev_err(arizona->dev, "Failed to isolate DCVDD: %d\n", ret);
+
+ return ret;
+}
+
+static int arizona_connect_dcvdd(struct arizona *arizona)
+{
+ int ret;
+
+ ret = regmap_update_bits(arizona->regmap,
+ ARIZONA_ISOLATION_CONTROL,
+ ARIZONA_ISOLATE_DCVDD1, 0);
+ if (ret != 0)
+ dev_err(arizona->dev, "Failed to connect DCVDD: %d\n", ret);
+
+ return ret;
+}
+
static int arizona_runtime_resume(struct device *dev)
{
struct arizona *arizona = dev_get_drvdata(dev);
@@ -499,14 +526,9 @@ static int arizona_runtime_resume(struct device *dev)
switch (arizona->type) {
case WM5102:
if (arizona->external_dcvdd) {
- ret = regmap_update_bits(arizona->regmap,
- ARIZONA_ISOLATION_CONTROL,
- ARIZONA_ISOLATE_DCVDD1, 0);
- if (ret != 0) {
- dev_err(arizona->dev,
- "Failed to connect DCVDD: %d\n", ret);
+ ret = arizona_connect_dcvdd(arizona);
+ if (ret != 0)
goto err;
- }
}
ret = wm5102_patch(arizona);
@@ -531,14 +553,9 @@ static int arizona_runtime_resume(struct device *dev)
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);
+ ret = arizona_connect_dcvdd(arizona);
+ if (ret != 0)
goto err;
- }
} else {
/*
* As this is only called for the internal regulator
@@ -569,14 +586,9 @@ static int arizona_runtime_resume(struct device *dev)
goto err;
if (arizona->external_dcvdd) {
- ret = regmap_update_bits(arizona->regmap,
- ARIZONA_ISOLATION_CONTROL,
- ARIZONA_ISOLATE_DCVDD1, 0);
- if (ret != 0) {
- dev_err(arizona->dev,
- "Failed to connect DCVDD: %d\n", ret);
+ ret = arizona_connect_dcvdd(arizona);
+ if (ret != 0)
goto err;
- }
}
break;
}
@@ -609,37 +621,36 @@ static int arizona_runtime_suspend(struct device *dev)
return ret;
}
- if (arizona->external_dcvdd) {
- ret = regmap_update_bits(arizona->regmap,
- ARIZONA_ISOLATION_CONTROL,
- ARIZONA_ISOLATE_DCVDD1,
- ARIZONA_ISOLATE_DCVDD1);
- if (ret != 0) {
- dev_err(arizona->dev, "Failed to isolate DCVDD: %d\n",
- ret);
- return ret;
- }
- }
-
switch (arizona->type) {
case WM5110:
case WM8280:
- if (arizona->external_dcvdd)
- break;
-
- /*
- * 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;
+ if (arizona->external_dcvdd) {
+ ret = arizona_isolate_dcvdd(arizona);
+ if (ret != 0)
+ return ret;
+ } 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,
+ 1175000, 1175000);
+ if (ret < 0) {
+ dev_err(arizona->dev,
+ "Failed to set suspend voltage: %d\n",
+ ret);
+ return ret;
+ }
}
break;
case WM5102:
+ if (arizona->external_dcvdd) {
+ ret = arizona_isolate_dcvdd(arizona);
+ if (ret != 0)
+ return ret;
+ }
+
if (!(val & ARIZONA_JD1_ENA)) {
ret = regmap_write(arizona->regmap,
ARIZONA_WRITE_SEQUENCER_CTRL_3, 0x0);
@@ -652,6 +663,11 @@ static int arizona_runtime_suspend(struct device *dev)
}
break;
default:
+ if (arizona->external_dcvdd) {
+ ret = arizona_isolate_dcvdd(arizona);
+ if (ret != 0)
+ return ret;
+ }
break;
}