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Subject[PATCH 2/2] mfd: tps65218.c: Add input voltage options
Date
These options apply to all regulators in this chip.

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

Signed-off-by: Christian Hohnstaedt <Christian.Hohnstaedt@wago.com>
---
drivers/mfd/tps65218.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 46 insertions(+)

diff --git a/drivers/mfd/tps65218.c b/drivers/mfd/tps65218.c
index 8bcdecf..f5e559b 100644
--- a/drivers/mfd/tps65218.c
+++ b/drivers/mfd/tps65218.c
@@ -211,6 +211,50 @@ static const struct of_device_id of_tps65218_match_table[] = {
};
MODULE_DEVICE_TABLE(of, of_tps65218_match_table);

+static void tps65218_options(struct tps65218 *tps)
+{
+ struct device *dev = tps->dev;
+ struct device_node *np = dev->of_node;
+ u32 pval;
+
+ if (!of_property_read_u32(np, "strict-supply-voltage", &pval)) {
+ tps65218_update_bits(tps, TPS65218_REG_CONFIG1,
+ TPS65218_CONFIG1_STRICT,
+ pval ? TPS65218_CONFIG1_STRICT : 0,
+ TPS65218_PROTECT_L1);
+ dev_dbg(dev, "tps65218 strict-supply-voltage: %d\n", pval);
+ }
+ if (!of_property_read_u32(np, "under-voltage-hysteresis", &pval)) {
+ if (pval != 400000 && pval != 200000) {
+ dev_err(dev,
+ "under-voltage-hysteresis must be %d or %d\n",
+ 200000, 400000);
+ } else {
+ tps65218_update_bits(tps, TPS65218_REG_CONFIG2,
+ TPS65218_CONFIG2_UVLOHYS,
+ pval == 400000 ? TPS65218_CONFIG2_UVLOHYS : 0,
+ TPS65218_PROTECT_L1);
+ }
+ dev_dbg(dev, "tps65218 under-voltage-hysteresis: %d\n", pval);
+ }
+ if (!of_property_read_u32(np, "under-voltage-limit", &pval)) {
+ int i, vals[] = { 275, 295, 325, 335 };
+
+ for (i = 0; i < ARRAY_SIZE(vals); i++) {
+ if (pval == vals[i] * 10000)
+ break;
+ }
+ if (i < ARRAY_SIZE(vals)) {
+ tps65218_update_bits(tps, TPS65218_REG_CONFIG1,
+ TPS65218_CONFIG1_UVLO_MASK, i,
+ TPS65218_PROTECT_L1);
+ } else {
+ dev_err(dev, "Invalid under-voltage-limit: %d\n", pval);
+ }
+ dev_dbg(dev, "tps65218 under-voltage-limit: %d=%d\n", pval, i);
+ }
+}
+
static int tps65218_probe(struct i2c_client *client,
const struct i2c_device_id *ids)
{
@@ -249,6 +293,8 @@ static int tps65218_probe(struct i2c_client *client,

tps->rev = chipid & TPS65218_CHIPID_REV_MASK;

+ tps65218_options(tps);
+
ret = mfd_add_devices(tps->dev, PLATFORM_DEVID_AUTO, tps65218_cells,
ARRAY_SIZE(tps65218_cells), NULL, 0,
regmap_irq_get_domain(tps->irq_data));
--
2.7.4
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