mfd: tps65218.c: Add input voltage options

These options apply to all regulators in this chip.

ti,strict-supply-voltage-supervision:
  Set STRICT flag in CONFIG1
ti,under-voltage-limit-microvolt:
  Select 2.75, 2.95, 3.25 or 3.35 V UVLO in CONFIG1
ti,under-voltage-hyst-microvolt:
  Select 200mV or 400mV UVLOHYS in CONFIG2

Signed-off-by: Christian Hohnstaedt <Christian.Hohnstaedt@wago.com>
Tested-by: Keerthy <j-keerthy@ti.com>
Reviewed-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

diff --git a/drivers/mfd/tps65218.c b/drivers/mfd/tps65218.c
index 8bcdecf494d050b5fc69290af8c908369fa9ed79..a62ea4cb8be7e6ecc52aba5b478c2eae036e06dd 100644 (file)
--- a/drivers/mfd/tps65218.c
+++ b/drivers/mfd/tps65218.c
@@ -211,6 +211,83 @@ static const struct of_device_id of_tps65218_match_table[] = {
 };
 MODULE_DEVICE_TABLE(of, of_tps65218_match_table);
 
+static int tps65218_voltage_set_strict(struct tps65218 *tps)
+{
+       u32 strict;
+
+       if (of_property_read_u32(tps->dev->of_node,
+                                "ti,strict-supply-voltage-supervision",
+                                &strict))
+               return 0;
+
+       if (strict != 0 && strict != 1) {
+               dev_err(tps->dev,
+                       "Invalid ti,strict-supply-voltage-supervision value\n");
+               return -EINVAL;
+       }
+
+       tps65218_update_bits(tps, TPS65218_REG_CONFIG1,
+                            TPS65218_CONFIG1_STRICT,
+                            strict ? TPS65218_CONFIG1_STRICT : 0,
+                            TPS65218_PROTECT_L1);
+       return 0;
+}
+
+static int tps65218_voltage_set_uv_hyst(struct tps65218 *tps)
+{
+       u32 hyst;
+
+       if (of_property_read_u32(tps->dev->of_node,
+                                "ti,under-voltage-hyst-microvolt", &hyst))
+               return 0;
+
+       if (hyst != 400000 && hyst != 200000) {
+               dev_err(tps->dev,
+                       "Invalid ti,under-voltage-hyst-microvolt value\n");
+               return -EINVAL;
+       }
+
+       tps65218_update_bits(tps, TPS65218_REG_CONFIG2,
+                            TPS65218_CONFIG2_UVLOHYS,
+                            hyst == 400000 ? TPS65218_CONFIG2_UVLOHYS : 0,
+                            TPS65218_PROTECT_L1);
+       return 0;
+}
+
+static int tps65218_voltage_set_uvlo(struct tps65218 *tps)
+{
+       u32 uvlo;
+       int uvloval;
+
+       if (of_property_read_u32(tps->dev->of_node,
+                                "ti,under-voltage-limit-microvolt", &uvlo))
+               return 0;
+
+       switch (uvlo) {
+       case 2750000:
+               uvloval = TPS65218_CONFIG1_UVLO_2750000;
+               break;
+       case 2950000:
+               uvloval = TPS65218_CONFIG1_UVLO_2950000;
+               break;
+       case 3250000:
+               uvloval = TPS65218_CONFIG1_UVLO_3250000;
+               break;
+       case 3350000:
+               uvloval = TPS65218_CONFIG1_UVLO_3350000;
+               break;
+       default:
+               dev_err(tps->dev,
+                       "Invalid ti,under-voltage-limit-microvolt value\n");
+               return -EINVAL;
+       }
+
+       tps65218_update_bits(tps, TPS65218_REG_CONFIG1,
+                            TPS65218_CONFIG1_UVLO_MASK, uvloval,
+                            TPS65218_PROTECT_L1);
+       return 0;
+}
+
 static int tps65218_probe(struct i2c_client *client,
                                const struct i2c_device_id *ids)
 {
@@ -249,6 +326,18 @@ static int tps65218_probe(struct i2c_client *client,
 
        tps->rev = chipid & TPS65218_CHIPID_REV_MASK;
 
+       ret = tps65218_voltage_set_strict(tps);
+       if (ret)
+               return ret;
+
+       ret = tps65218_voltage_set_uvlo(tps);
+       if (ret)
+               return ret;
+
+       ret = tps65218_voltage_set_uv_hyst(tps);
+       if (ret)
+               return ret;
+
        ret = mfd_add_devices(tps->dev, PLATFORM_DEVID_AUTO, tps65218_cells,
                              ARRAY_SIZE(tps65218_cells), NULL, 0,
                              regmap_irq_get_domain(tps->irq_data));

diff --git a/include/linux/mfd/tps65218.h b/include/linux/mfd/tps65218.h
index c204d9a79436f324523f8b3d21c65fce37bc359b..3cbe103495ab4a9e326b816dfaf169cca38398eb 100644 (file)
--- a/include/linux/mfd/tps65218.h
+++ b/include/linux/mfd/tps65218.h
@@ -137,6 +137,10 @@
 #define TPS65218_CONFIG1_PGDLY_MASK    0x18
 #define TPS65218_CONFIG1_STRICT                BIT(2)
 #define TPS65218_CONFIG1_UVLO_MASK     0x3
+#define TPS65218_CONFIG1_UVLO_2750000  0x0
+#define TPS65218_CONFIG1_UVLO_2950000  0x1
+#define TPS65218_CONFIG1_UVLO_3250000  0x2
+#define TPS65218_CONFIG1_UVLO_3350000  0x3
 
 #define TPS65218_CONFIG2_DC12_RST      BIT(7)
 #define TPS65218_CONFIG2_UVLOHYS       BIT(6)