Skip to content

Commit

Permalink
rtc: pcf85063: add nvram support
Browse files Browse the repository at this point in the history
The pcf85063 has one byte of nvram.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
  • Loading branch information
Alexandre Belloni committed Apr 4, 2019
1 parent 5b3a3ad commit fadfd09
Showing 1 changed file with 24 additions and 0 deletions.
24 changes: 24 additions & 0 deletions drivers/rtc/rtc-pcf85063.c
Original file line number Diff line number Diff line change
Expand Up @@ -38,6 +38,8 @@
#define PCF85063_CTRL2_AF BIT(6)
#define PCF85063_CTRL2_AIE BIT(7)

#define PCF85063_REG_RAM 0x03

#define PCF85063_REG_SC 0x04 /* datetime */
#define PCF85063_REG_SC_OS 0x80

Expand Down Expand Up @@ -236,6 +238,18 @@ static const struct rtc_class_ops pcf85063_rtc_ops_alarm = {
.alarm_irq_enable = pcf85063_rtc_alarm_irq_enable,
};

static int pcf85063_nvmem_read(void *priv, unsigned int offset,
void *val, size_t bytes)
{
return regmap_read(priv, PCF85063_REG_RAM, val);
}

static int pcf85063_nvmem_write(void *priv, unsigned int offset,
void *val, size_t bytes)
{
return regmap_write(priv, PCF85063_REG_RAM, *(u8 *)val);
}

static int pcf85063_load_capacitance(struct pcf85063 *pcf85063,
const struct device_node *np,
unsigned int force_cap)
Expand Down Expand Up @@ -298,6 +312,13 @@ static int pcf85063_probe(struct i2c_client *client)
int err;
const struct pcf85063_config *config = &pcf85063tp_config;
const void *data = of_device_get_match_data(&client->dev);
struct nvmem_config nvmem_cfg = {
.name = "pcf85063_nvram",
.reg_read = pcf85063_nvmem_read,
.reg_write = pcf85063_nvmem_write,
.type = NVMEM_TYPE_BATTERY_BACKED,
.size = 1,
};

dev_dbg(&client->dev, "%s\n", __func__);

Expand Down Expand Up @@ -354,6 +375,9 @@ static int pcf85063_probe(struct i2c_client *client)
}
}

nvmem_cfg.priv = pcf85063->regmap;
rtc_nvmem_register(pcf85063->rtc, &nvmem_cfg);

return rtc_register_device(pcf85063->rtc);
}

Expand Down

0 comments on commit fadfd09

Please sign in to comment.