mfd: Support configurable numbers of DCDCs and ISINKs on WM8350
Some WM8350 variants have fewer DCDCs and ISINKs. Identify these at
probe and refuse to use the absent DCDCs when running on these chips.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@openedhand.com>
diff --git a/drivers/mfd/wm8350-core.c b/drivers/mfd/wm8350-core.c
index 03af3b1..56c363c 100644
--- a/drivers/mfd/wm8350-core.c
+++ b/drivers/mfd/wm8350-core.c
@@ -1301,6 +1301,9 @@
switch (mask_rev) {
case 0:
+ wm8350->pmic.max_dcdc = WM8350_DCDC_6;
+ wm8350->pmic.max_isink = WM8350_ISINK_B;
+
switch (chip_rev) {
case WM8350_REV_E:
dev_info(wm8350->dev, "WM8350 Rev E\n");
@@ -1325,6 +1328,9 @@
break;
case 2:
+ wm8350->pmic.max_dcdc = WM8350_DCDC_6;
+ wm8350->pmic.max_isink = WM8350_ISINK_B;
+
switch (chip_rev) {
case 0:
dev_info(wm8350->dev, "WM8352 Rev A\n");
diff --git a/drivers/regulator/wm8350-regulator.c b/drivers/regulator/wm8350-regulator.c
index 1f44b17..c68c496 100644
--- a/drivers/regulator/wm8350-regulator.c
+++ b/drivers/regulator/wm8350-regulator.c
@@ -1380,6 +1380,13 @@
if (wm8350->pmic.pdev[reg])
return -EBUSY;
+ if (reg >= WM8350_DCDC_1 && reg <= WM8350_DCDC_6 &&
+ reg > wm8350->pmic.max_dcdc)
+ return -ENODEV;
+ if (reg >= WM8350_ISINK_A && reg <= WM8350_ISINK_B &&
+ reg > wm8350->pmic.max_isink)
+ return -ENODEV;
+
pdev = platform_device_alloc("wm8350-regulator", reg);
if (!pdev)
return -ENOMEM;
diff --git a/include/linux/mfd/wm8350/pmic.h b/include/linux/mfd/wm8350/pmic.h
index 69b69e0..96acbfc 100644
--- a/include/linux/mfd/wm8350/pmic.h
+++ b/include/linux/mfd/wm8350/pmic.h
@@ -701,6 +701,10 @@
struct regulator_init_data;
struct wm8350_pmic {
+ /* Number of regulators of each type on this device */
+ int max_dcdc;
+ int max_isink;
+
/* ISINK to DCDC mapping */
int isink_A_dcdc;
int isink_B_dcdc;