This is not a proper WD driver because it's not planned to
support WD driver for PMIC in u-boot at any time.
The purpose is just WD disable.
Signed-off-by: Jerome Neanne <jnea...@baylibre.com>
---
drivers/power/pmic/tps65941.c | 36 +++++++++++++++++++++++++++++++++++
include/power/tps65941.h | 25 ++++++++++++++++++++++--
2 files changed, 59 insertions(+), 2 deletions(-)
diff --git a/drivers/power/pmic/tps65941.c b/drivers/power/pmic/tps65941.c
index 83d0f83c64..643ea6179c 100644
--- a/drivers/power/pmic/tps65941.c
+++ b/drivers/power/pmic/tps65941.c
@@ -47,6 +47,9 @@ static int tps65941_bind(struct udevice *dev)
ofnode regulators_node;
int children;
+ if (dev->driver_data == TPS65941_WD)
+ return 0;
+
regulators_node = dev_read_subnode(dev, "regulators");
if (!ofnode_valid(regulators_node)) {
debug("%s: %s regulators subnode not found!\n", __func__,
@@ -64,6 +67,36 @@ static int tps65941_bind(struct udevice *dev)
return dm_scan_fdt_dev(dev);
}
+static int stop_watchdog(struct udevice *wd_i2c_dev)
+{
+ int ret;
+
+ ret = dm_i2c_reg_read(wd_i2c_dev, TPS65941_WD_MODE_REG);
+ if (ret < 0) {
+ debug("failed to write i2c reg (%d)\n", ret);
+ return 0;
+ }
+
+ ret &= ~TPS65941_WD_PWRHOLD_MASK;
+ ret |= TPS65941_WD_PWRHOLD_MASK;
+ ret = dm_i2c_reg_write(wd_i2c_dev, TPS65941_WD_MODE_REG, ret);
+ if (ret)
+ debug("%s: %s write WD disable fail!\n", __func__,
wd_i2c_dev->name);
+ ret = dm_i2c_reg_read(wd_i2c_dev, TPS65941_WD_MODE_REG);
+ if (ret < 0) {
+ debug("failed to read back i2c reg (%d)\n", ret);
+ return 0;
+ }
+ return 0;
+}
+
+static int tps65941_probe(struct udevice *dev)
+{
+ if (dev->driver_data == TPS65941_WD)
+ return stop_watchdog(dev);
+ return 0;
+}
+
static struct dm_pmic_ops tps65941_ops = {
.read = tps65941_read,
.write = tps65941_write,
@@ -73,7 +106,9 @@ static const struct udevice_id tps65941_ids[] = {
{ .compatible = "ti,tps659411", .data = TPS659411 },
{ .compatible = "ti,tps659412", .data = TPS659411 },
{ .compatible = "ti,tps659413", .data = TPS659413 },
+ { .compatible = "ti,tps659312", .data = TPS659312 },
{ .compatible = "ti,lp876441", .data = LP876441 },
+ { .compatible = "ti,tps65941_watchdog", .data = TPS65941_WD },
{ }
};
@@ -82,5 +117,6 @@ U_BOOT_DRIVER(pmic_tps65941) = {
.id = UCLASS_PMIC,
.of_match = tps65941_ids,
.bind = tps65941_bind,
+ .probe = tps65941_probe,
.ops = &tps65941_ops,
};
diff --git a/include/power/tps65941.h b/include/power/tps65941.h
index a2bc6814ba..70c7274355 100644
--- a/include/power/tps65941.h
+++ b/include/power/tps65941.h
@@ -2,7 +2,9 @@
#define TPS659412 0x1
#define TPS659413 0x2
#define TPS659414 0x3
-#define LP876441 0x4
+#define TPS659312 0x4
+#define LP876441 0x5
+#define TPS65941_WD 0x20
/* I2C device address for pmic tps65941 */
#define TPS65941_I2C_ADDR (0x12 >> 1)
@@ -18,10 +20,29 @@
#define TPS65941_BUCK_VOLT_MAX 3340000
#define TPS65941_BUCK_MODE_MASK 0x1
-#define TPS65941_LDO_VOLT_MASK 0x3E
+#define TPS65941_LDO_VOLT_MASK 0x7F
#define TPS65941_LDO_VOLT_MAX_HEX 0x3A
#define TPS65941_LDO_VOLT_MIN_HEX 0x4
#define TPS65941_LDO_VOLT_MAX 3300000
#define TPS65941_LDO_MODE_MASK 0x1
#define TPS65941_LDO_BYPASS_EN 0x80
#define TP65941_BUCK_CONF_SLEW_MASK 0x7
+
+/* BYPASS is bit7 of VOUT TPS65941_LDO_BYP_MASK */
+#define TPS65941_LDO123_BYP_CONFIG 7
+
+#define TPS65941_LDO123_VOLT_BYP_MIN 1700000
+#define TPS65941_LDO123_VOLT_BYP_MAX 3600000
+#define TPS65941_LDO123_VOLT_MIN 600000
+#define TPS65941_LDO4_VOLT_MIN 1200000
+#define TPS65941_LDO4_VOLT_MIN 1200000
+#define TPS65941_LDO123_VSET_MIN 0x04
+#define TPS65941_LDO4_VSET_MIN 0x20
+#define TPS65941_LDO123_VSET_MAX 0x3A
+#define TPS65941_LDO4_VSET_MAX 0x74
+#define TPS65941_LDO123_STEP 50000
+#define TPS65941_LDO4_STEP 25000
+
+#define TPS65941_WD_MODE_REG 0x406
+#define TPS65941_WD_PWRHOLD_MASK BIT(2)
+
--
2.25.1
