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rtc: pcf85063: add nvram support

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The pcf85063 has one byte of nvram.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Alexandre Belloni 2019-04-01 18:08:14 +02:00
parent 5b3a3ade02
commit fadfd092ee
1 changed files with 24 additions and 0 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

24
drivers/rtc/rtc-pcf85063.c
View file

@ -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
@ -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)
@ -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__);
@ -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);
}