diff options
| author | Bastian Krause <bst@pengutronix.de> | 2020-09-17 20:32:46 +0200 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2020-09-24 09:56:04 +0200 |
| commit | 0026f1604c9ba1ae8108d4977da0366c283552bc (patch) | |
| tree | 1d408e8a6b338d0b955626ad1222359851b34edc /drivers/rtc | |
| parent | 0874734e09af5cc05439dbe2c8ff704f14d679f5 (diff) | |
| download | linux-0026f1604c9ba1ae8108d4977da0366c283552bc.tar.bz2 | |
rtc: ds1307: enable rx8130's backup battery, make it chargeable optionally
The ds1307 charger infrastructure now allows to add a rx8130 charger
setup that..
- does not depend on trickle-resistor-ohms
- does not use DS13XX_TRICKLE_CHARGER_MAGIC trickle-charge select (TCS)
bits
- keeps previous no-charge behavior for device trees without
aux-voltage-chargeable
Make that happen.
Signed-off-by: Bastian Krause <bst@pengutronix.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20200917183246.19446-9-bst@pengutronix.de
Diffstat (limited to 'drivers/rtc')
| -rw-r--r-- | drivers/rtc/rtc-ds1307.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c index 03e166d2b0f8..9f5f54ca039d 100644 --- a/drivers/rtc/rtc-ds1307.c +++ b/drivers/rtc/rtc-ds1307.c @@ -122,6 +122,9 @@ enum ds_type { #define RX8130_REG_FLAG_AF BIT(3) #define RX8130_REG_CONTROL0 0x1e #define RX8130_REG_CONTROL0_AIE BIT(3) +#define RX8130_REG_CONTROL1 0x1f +#define RX8130_REG_CONTROL1_INIEN BIT(4) +#define RX8130_REG_CONTROL1_CHGEN BIT(5) #define MCP794XX_REG_CONTROL 0x07 # define MCP794XX_BIT_ALM0_EN 0x10 @@ -541,6 +544,16 @@ static u8 do_trickle_setup_ds1339(struct ds1307 *ds1307, u32 ohms, bool diode) return setup; } +static u8 do_trickle_setup_rx8130(struct ds1307 *ds1307, u32 ohms, bool diode) +{ + /* make sure that the backup battery is enabled */ + u8 setup = RX8130_REG_CONTROL1_INIEN; + if (diode) + setup |= RX8130_REG_CONTROL1_CHGEN; + + return setup; +} + static irqreturn_t rx8130_irq(int irq, void *dev_id) { struct ds1307 *ds1307 = dev_id; @@ -1029,6 +1042,8 @@ static const struct chip_desc chips[last_ds_type] = { .offset = 0x10, .irq_handler = rx8130_irq, .rtc_ops = &rx8130_rtc_ops, + .trickle_charger_reg = RX8130_REG_CONTROL1, + .do_trickle_setup = &do_trickle_setup_rx8130, }, [m41t0] = { .rtc_ops = &m41txx_rtc_ops, |