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rtc: ds1307: consider aux-voltage-chargeable

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Prefer aux-voltage-chargeable over trickle-diode-disable and set diode
accordingly. This is then passed to the chip's appropriate charge setup
function.

Signed-off-by: Bastian Krause <bst@pengutronix.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20200917183246.19446-8-bst@pengutronix.de
This commit is contained in:
Bastian Krause 2020-09-17 20:32:45 +02:00 committed by Alexandre Belloni
parent 95a74cbb21
commit 0874734e09
1 changed files with 21 additions and 2 deletions
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23
drivers/rtc/rtc-ds1307.c
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@ -1313,7 +1313,7 @@ static int ds1307_nvram_write(void *priv, unsigned int offset, void *val,
static u8 ds1307_trickle_init(struct ds1307 *ds1307,
const struct chip_desc *chip)
{
u32 ohms;
u32 ohms, chargeable;
bool diode = chip->charge_default;
if (!chip->do_trickle_setup)
@ -1323,8 +1323,27 @@ static u8 ds1307_trickle_init(struct ds1307 *ds1307,
&ohms) && chip->requires_trickle_resistor)
return 0;
if (device_property_read_bool(ds1307->dev, "trickle-diode-disable"))
/* aux-voltage-chargeable takes precedence over the deprecated
* trickle-diode-disable
*/
if (!device_property_read_u32(ds1307->dev, "aux-voltage-chargeable",
&chargeable)) {
switch (chargeable) {
case 0:
diode = false;
break;
case 1:
diode = true;
break;
default:
dev_warn(ds1307->dev,
"unsupported aux-voltage-chargeable value\n");
break;
}
} else if (device_property_read_bool(ds1307->dev,
"trickle-diode-disable")) {
diode = false;
}
return chip->do_trickle_setup(ds1307, ohms, diode);
}