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rtc: pcf85363: Add support for NXP pcf85263 rtc 

Add support for NXP pcf85263 real-time clock. pcf85263 rtc is compatible
with pcf85363,except that pcf85363 has additional 64 bytes of RAM.

1 byte of nvmem is supported and exposed in sysfs (# is the instance
number,starting with 0): /sys/bus/nvmem/devices/pcf85x63-#/nvmem

Signed-off-by: Biju Das <biju.das@bp.renesas.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Biju Das 2018-12-07 11:27:44 +00:00 committed by Alexandre Belloni
parent bae5e94bea
commit fc979933bc
1 changed files with 76 additions and 18 deletions
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94
drivers/rtc/rtc-pcf85363.c
View File

@ -120,6 +120,11 @@ struct pcf85363 {
struct regmap *regmap;
};
struct pcf85x63_config {
struct regmap_config regmap;
unsigned int num_nvram;
};
static int pcf85363_rtc_read_time(struct device *dev, struct rtc_time *tm)
{
struct pcf85363 *pcf85363 = dev_get_drvdata(dev);
@ -311,25 +316,75 @@ static int pcf85363_nvram_write(void *priv, unsigned int offset, void *val,
val, bytes);
}
static const struct regmap_config regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = 0x7f,
static int pcf85x63_nvram_read(void *priv, unsigned int offset, void *val,
size_t bytes)
{
struct pcf85363 *pcf85363 = priv;
unsigned int tmp_val;
int ret;
ret = regmap_read(pcf85363->regmap, CTRL_RAMBYTE, &tmp_val);
(*(unsigned char *) val) = (unsigned char) tmp_val;
return ret;
}
static int pcf85x63_nvram_write(void *priv, unsigned int offset, void *val,
size_t bytes)
{
struct pcf85363 *pcf85363 = priv;
unsigned char tmp_val;
tmp_val = *((unsigned char *)val);
return regmap_write(pcf85363->regmap, CTRL_RAMBYTE,
(unsigned int)tmp_val);
}
static const struct pcf85x63_config pcf_85263_config = {
.regmap = {
.reg_bits = 8,
.val_bits = 8,
.max_register = 0x2f,
},
.num_nvram = 1
};
static const struct pcf85x63_config pcf_85363_config = {
.regmap = {
.reg_bits = 8,
.val_bits = 8,
.max_register = 0x7f,
},
.num_nvram = 2
};
static int pcf85363_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct pcf85363 *pcf85363;
struct nvmem_config nvmem_cfg = {
.name = "pcf85363-",
.word_size = 1,
.stride = 1,
.size = NVRAM_SIZE,
.reg_read = pcf85363_nvram_read,
.reg_write = pcf85363_nvram_write,
const struct pcf85x63_config *config = &pcf_85363_config;
const void *data = of_device_get_match_data(&client->dev);
static struct nvmem_config nvmem_cfg[] = {
{
.name = "pcf85x63-",
.word_size = 1,
.stride = 1,
.size = 1,
.reg_read = pcf85x63_nvram_read,
.reg_write = pcf85x63_nvram_write,
}, {
.name = "pcf85363-",
.word_size = 1,
.stride = 1,
.size = NVRAM_SIZE,
.reg_read = pcf85363_nvram_read,
.reg_write = pcf85363_nvram_write,
},
};
int ret;
int ret, i;
if (data)
config = data;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
return -ENODEV;
@ -339,7 +394,7 @@ static int pcf85363_probe(struct i2c_client *client,
if (!pcf85363)
return -ENOMEM;
pcf85363->regmap = devm_regmap_init_i2c(client, &regmap_config);
pcf85363->regmap = devm_regmap_init_i2c(client, &config->regmap);
if (IS_ERR(pcf85363->regmap)) {
dev_err(&client->dev, "regmap allocation failed\n");
return PTR_ERR(pcf85363->regmap);
@ -370,15 +425,18 @@ static int pcf85363_probe(struct i2c_client *client,
ret = rtc_register_device(pcf85363->rtc);
nvmem_cfg.priv = pcf85363;
rtc_nvmem_register(pcf85363->rtc, &nvmem_cfg);
for (i = 0; i < config->num_nvram; i++) {
nvmem_cfg[i].priv = pcf85363;
rtc_nvmem_register(pcf85363->rtc, &nvmem_cfg[i]);
}
return ret;
}
static const struct of_device_id dev_ids[] = {
{ .compatible = "nxp,pcf85363" },
{}
{ .compatible = "nxp,pcf85263", .data = &pcf_85263_config },
{ .compatible = "nxp,pcf85363", .data = &pcf_85363_config },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, dev_ids);
@ -393,5 +451,5 @@ static struct i2c_driver pcf85363_driver = {
module_i2c_driver(pcf85363_driver);
MODULE_AUTHOR("Eric Nelson");
MODULE_DESCRIPTION("pcf85363 I2C RTC driver");
MODULE_DESCRIPTION("pcf85263/pcf85363 I2C RTC driver");
MODULE_LICENSE("GPL");