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 <[email protected]> --- V1-->V2 Incorporated Alexandre and Geert's review comment. --- drivers/rtc/rtc-pcf85363.c | 72 ++++++++++++++++++++++++++++++++++++---------- 1 file changed, 57 insertions(+), 15 deletions(-) diff --git a/drivers/rtc/rtc-pcf85363.c b/drivers/rtc/rtc-pcf85363.c index c04a1ed..9c567c8 100644 --- a/drivers/rtc/rtc-pcf85363.c +++ b/drivers/rtc/rtc-pcf85363.c @@ -311,7 +311,30 @@ static int pcf85363_nvram_write(void *priv, unsigned int offset, void *val, val, bytes); } -static const struct regmap_config regmap_config = { +static int pcf85x63_nvram_read(void *priv, unsigned int offset, void *val, + size_t bytes) +{ + struct pcf85363 *pcf85363 = priv; + + return regmap_read(pcf85363->regmap, CTRL_RAMBYTE, val); +} + +static int pcf85x63_nvram_write(void *priv, unsigned int offset, void *val, + size_t bytes) +{ + struct pcf85363 *pcf85363 = priv; + + return regmap_write(pcf85363->regmap, CTRL_RAMBYTE, + *((unsigned int *)val)); +} + +static const struct regmap_config pcf_85263_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = 0x2f, +}; + +static const struct regmap_config pcf_85363_regmap_config = { .reg_bits = 8, .val_bits = 8, .max_register = 0x7f, @@ -321,15 +344,25 @@ 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 regmap_config *regmap_config = &pcf_85363_regmap_config; + 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, num_nvmem = 2; if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) return -ENODEV; @@ -339,7 +372,13 @@ static int pcf85363_probe(struct i2c_client *client, if (!pcf85363) return -ENOMEM; - pcf85363->regmap = devm_regmap_init_i2c(client, ®map_config); + if (of_device_get_match_data(&client->dev) == + &pcf_85263_regmap_config) { + regmap_config = &pcf_85263_regmap_config; + num_nvmem = 1; + } + + pcf85363->regmap = devm_regmap_init_i2c(client, regmap_config); if (IS_ERR(pcf85363->regmap)) { dev_err(&client->dev, "regmap allocation failed\n"); return PTR_ERR(pcf85363->regmap); @@ -370,15 +409,18 @@ 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 < num_nvmem ; 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_regmap_config }, + { .compatible = "nxp,pcf85363", .data = &pcf_85363_regmap_config }, + { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, dev_ids); @@ -393,5 +435,5 @@ 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"); -- 2.7.4
