diff options
| -rw-r--r-- | drivers/rtc/Kconfig | 19 | ||||
| -rw-r--r-- | drivers/rtc/rtc-pcf2127.c | 118 |
2 files changed, 126 insertions, 11 deletions
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index d2cd206d2965..544bd3493852 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -379,15 +379,6 @@ config RTC_DRV_X1205 This driver can also be built as a module. If so, the module will be called rtc-x1205. -config RTC_DRV_PCF2127 - tristate "NXP PCF2127" - help - If you say yes here you get support for the NXP PCF2127/29 RTC - chips. - - This driver can also be built as a module. If so, the module - will be called rtc-pcf2127. - config RTC_DRV_PCF8523 tristate "NXP PCF8523" help @@ -776,6 +767,16 @@ config RTC_DRV_DS3232 This driver can also be built as a module. If so, the module will be called rtc-ds3232. +config RTC_DRV_PCF2127 + tristate "NXP PCF2127" + depends on RTC_I2C_AND_SPI + help + If you say yes here you get support for the NXP PCF2127/29 RTC + chips. + + This driver can also be built as a module. If so, the module + will be called rtc-pcf2127. + comment "Platform RTC drivers" # this 'CMOS' RTC driver is arch dependent because <asm-generic/rtc.h> diff --git a/drivers/rtc/rtc-pcf2127.c b/drivers/rtc/rtc-pcf2127.c index fa492cd84e2a..194c440f15d3 100644 --- a/drivers/rtc/rtc-pcf2127.c +++ b/drivers/rtc/rtc-pcf2127.c @@ -1,5 +1,5 @@ /* - * An I2C driver for the NXP PCF2127 RTC + * An I2C and SPI driver for the NXP PCF2127 RTC * Copyright 2013 Til-Technologies * * Author: Renaud Cerrato <r.cerrato@til-technologies.fr> @@ -14,6 +14,7 @@ */ #include <linux/i2c.h> +#include <linux/spi/spi.h> #include <linux/bcd.h> #include <linux/rtc.h> #include <linux/slab.h> @@ -200,6 +201,8 @@ static const struct of_device_id pcf2127_of_match[] = { MODULE_DEVICE_TABLE(of, pcf2127_of_match); #endif +#if IS_ENABLED(CONFIG_I2C) + static int pcf2127_i2c_write(void *context, const void *data, size_t count) { struct device *dev = context; @@ -311,7 +314,118 @@ static struct i2c_driver pcf2127_i2c_driver = { .probe = pcf2127_i2c_probe, .id_table = pcf2127_i2c_id, }; -module_i2c_driver(pcf2127_i2c_driver); + +static int pcf2127_i2c_register_driver(void) +{ + return i2c_add_driver(&pcf2127_i2c_driver); +} + +static void pcf2127_i2c_unregister_driver(void) +{ + i2c_del_driver(&pcf2127_i2c_driver); +} + +#else + +static int pcf2127_i2c_register_driver(void) +{ + return 0; +} + +static void pcf2127_i2c_unregister_driver(void) +{ +} + +#endif + +#if IS_ENABLED(CONFIG_SPI_MASTER) + +static struct spi_driver pcf2127_spi_driver; + +static int pcf2127_spi_probe(struct spi_device *spi) +{ + static const struct regmap_config config = { + .reg_bits = 8, + .val_bits = 8, + .read_flag_mask = 0xa0, + .write_flag_mask = 0x20, + }; + struct regmap *regmap; + + regmap = devm_regmap_init_spi(spi, &config); + if (IS_ERR(regmap)) { + dev_err(&spi->dev, "%s: regmap allocation failed: %ld\n", + __func__, PTR_ERR(regmap)); + return PTR_ERR(regmap); + } + + return pcf2127_probe(&spi->dev, regmap, pcf2127_spi_driver.driver.name); +} + +static const struct spi_device_id pcf2127_spi_id[] = { + { "pcf2127", 0 }, + { } +}; +MODULE_DEVICE_TABLE(spi, pcf2127_spi_id); + +static struct spi_driver pcf2127_spi_driver = { + .driver = { + .name = "rtc-pcf2127-spi", + .of_match_table = of_match_ptr(pcf2127_of_match), + }, + .probe = pcf2127_spi_probe, + .id_table = pcf2127_spi_id, +}; + +static int pcf2127_spi_register_driver(void) +{ + return spi_register_driver(&pcf2127_spi_driver); +} + +static void pcf2127_spi_unregister_driver(void) +{ + spi_unregister_driver(&pcf2127_spi_driver); +} + +#else + +static int pcf2127_spi_register_driver(void) +{ + return 0; +} + +static void pcf2127_spi_unregister_driver(void) +{ +} + +#endif + +static int __init pcf2127_init(void) +{ + int ret; + + ret = pcf2127_i2c_register_driver(); + if (ret) { + pr_err("Failed to register pcf2127 i2c driver: %d\n", ret); + return ret; + } + + ret = pcf2127_spi_register_driver(); + if (ret) { + pr_err("Failed to register pcf2127 spi driver: %d\n", ret); + pcf2127_i2c_unregister_driver(); + } + + return ret; +} +module_init(pcf2127_init) + +static void __exit pcf2127_exit(void) +{ + pcf2127_spi_unregister_driver(); + pcf2127_i2c_unregister_driver(); +} +module_exit(pcf2127_exit) MODULE_AUTHOR("Renaud Cerrato <r.cerrato@til-technologies.fr>"); MODULE_DESCRIPTION("NXP PCF2127 RTC driver"); |