From fadfd092ee9138825d8c2a4f95719d2e2e3202b9 Mon Sep 17 00:00:00 2001 From: Alexandre Belloni Date: Mon, 1 Apr 2019 18:08:14 +0200 Subject: rtc: pcf85063: add nvram support The pcf85063 has one byte of nvram. Signed-off-by: Alexandre Belloni --- drivers/rtc/rtc-pcf85063.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) (limited to 'drivers/rtc/rtc-pcf85063.c') diff --git a/drivers/rtc/rtc-pcf85063.c b/drivers/rtc/rtc-pcf85063.c index ba4e75fbf258..0a03a60bc31f 100644 --- a/drivers/rtc/rtc-pcf85063.c +++ b/drivers/rtc/rtc-pcf85063.c @@ -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); } -- cgit