[PATCH 8/9] regulator: tps65218: do not disable DCDC3 during poweroff on broken PMICs

Keerthy
2016-06-20T08:50:38Z

From: Tero Kristo <t-kristo@ti.com>

Some versions of tps65218 do not seem to support poweroff modes properly
if DCDC3 regulator is shut-down. Thus, keep it enabled even during
poweroff if the version info matches the broken silicon revision.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
Signed-off-by: Keerthy <j-keerthy@ti.com>
---
drivers/regulator/tps65218-regulator.c | 8 ++++++++
include/linux/mfd/tps65218.h | 5 +++++
2 files changed, 13 insertions(+)

diff --git a/drivers/regulator/tps65218-regulator.c b/drivers/regulator/tps65218-regulator.c
index d1e631d..eb0f5b1 100644
--- a/drivers/regulator/tps65218-regulator.c
+++ b/drivers/regulator/tps65218-regulator.c
@@ -180,6 +180,14 @@ static int tps65218_pmic_set_suspend_disable(struct regulator_dev *dev)
if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)
return -EINVAL;

+ /*
+ * Certain revisions of TPS65218 will need to have DCDC3 regulator
+ * enabled always, otherwise an immediate system reboot will occur
+ * during poweroff.
+ */
+ if (rid == TPS65218_DCDC_3 && tps->rev == TPS65218_REV_2_1)
+ return 0;
+
if (!tps->info[rid]->strobe) {
if (rid == TPS65218_DCDC_3)
tps->info[rid]->strobe = 3;
diff --git a/include/linux/mfd/tps65218.h b/include/linux/mfd/tps65218.h
index 85e464e..d1db952 100644
--- a/include/linux/mfd/tps65218.h
+++ b/include/linux/mfd/tps65218.h
@@ -63,6 +63,11 @@
#define TPS65218_CHIPID_CHIP_MASK 0xF8
#define TPS65218_CHIPID_REV_MASK 0x07

+#define TPS65218_REV_1_0 0x0
+#define TPS65218_REV_1_1 0x1
+#define TPS65218_REV_2_0 0x2
+#define TPS65218_REV_2_1 0x3
+
#define TPS65218_INT1_VPRG BIT(5)
#define TPS65218_INT1_AC BIT(4)
#define TPS65218_INT1_PB BIT(3)
--
1.9.1