Commit fadfd092 authored by Alexandre Belloni's avatar Alexandre Belloni
Browse files

rtc: pcf85063: add nvram support 



The pcf85063 has one byte of nvram.

Signed-off-by: default avatarAlexandre Belloni <alexandre.belloni@bootlin.com>
parent 5b3a3ade

drivers/rtc/rtc-pcf85063.c

+24 −0
Original line number Diff line number Diff line
@@ -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);

}