Commit d57f7287 authored by Christian Hohnstaedt's avatar Christian Hohnstaedt Committed by Lee Jones
Browse files

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: default avatarChristian Hohnstaedt <Christian.Hohnstaedt@wago.com>
Tested-by: default avatarKeerthy <j-keerthy@ti.com>
Reviewed-by: default avatarKeerthy <j-keerthy@ti.com>
Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
parent b2b65875

drivers/mfd/tps65218.c

+89 −0
Original line number Diff line number Diff line
@@ -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));

include/linux/mfd/tps65218.h

+4 −0
Original line number Diff line number Diff line
@@ -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)

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