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authorMylène Josserand <mylene.josserand@free-electrons.com>2016-05-03 11:54:34 +0200
committerAlexandre Belloni <alexandre.belloni@free-electrons.com>2016-05-21 17:06:52 +0200
commitc2a1c145401df063d1197ace5d3b5bd323e26f86 (patch)
treeb2da82521e97d411b442c9871ed62fa3545e7e9c
parente6e380821236b628a1379db97d777da3e36b8240 (diff)
rtc: rv3029: Add support of RV3049
Add support of Microcrystal RV3049 RTC (SPI) using regmap on the RV3029 (I2C) driver. Signed-off-by: Mylène Josserand <mylene.josserand@free-electrons.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
-rw-r--r--drivers/rtc/Kconfig37
-rw-r--r--drivers/rtc/rtc-rv3029c2.c108
2 files changed, 124 insertions, 21 deletions
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index f1e1f50..18639e0 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -573,24 +573,6 @@ config RTC_DRV_EM3027
This driver can also be built as a module. If so, the module
will be called rtc-em3027.
-config RTC_DRV_RV3029C2
- tristate "Micro Crystal RV3029"
- help
- If you say yes here you get support for the Micro Crystal
- RV3029 RTC chips.
-
- This driver can also be built as a module. If so, the module
- will be called rtc-rv3029c2.
-
-config RTC_DRV_RV3029_HWMON
- bool "HWMON support for RV3029"
- depends on RTC_DRV_RV3029C2 && HWMON
- depends on !(RTC_DRV_RV3029C2=y && HWMON=m)
- default y
- help
- Say Y here if you want to expose temperature sensor data on
- rtc-rv3029.
-
config RTC_DRV_RV8803
tristate "Micro Crystal RV8803"
help
@@ -786,6 +768,25 @@ config RTC_DRV_PCF2127
This driver can also be built as a module. If so, the module
will be called rtc-pcf2127.
+config RTC_DRV_RV3029C2
+ tristate "Micro Crystal RV3029/3049"
+ depends on RTC_I2C_AND_SPI
+ help
+ If you say yes here you get support for the Micro Crystal
+ RV3029 and RV3049 RTC chips.
+
+ This driver can also be built as a module. If so, the module
+ will be called rtc-rv3029c2.
+
+config RTC_DRV_RV3029_HWMON
+ bool "HWMON support for RV3029/3049"
+ depends on RTC_DRV_RV3029C2 && HWMON
+ depends on !(RTC_DRV_RV3029C2=y && HWMON=m)
+ default y
+ help
+ Say Y here if you want to expose temperature sensor data on
+ rtc-rv3029.
+
comment "Platform RTC drivers"
# this 'CMOS' RTC driver is arch dependent because <asm-generic/rtc.h>
diff --git a/drivers/rtc/rtc-rv3029c2.c b/drivers/rtc/rtc-rv3029c2.c
index 96dd166..1310646 100644
--- a/drivers/rtc/rtc-rv3029c2.c
+++ b/drivers/rtc/rtc-rv3029c2.c
@@ -1,5 +1,5 @@
/*
- * Micro Crystal RV-3029 rtc class driver
+ * Micro Crystal RV-3029 / RV-3049 rtc class driver
*
* Author: Gregory Hermant <gregory.hermant@calao-systems.com>
* Michael Buesch <m@bues.ch>
@@ -14,6 +14,7 @@
#include <linux/module.h>
#include <linux/i2c.h>
+#include <linux/spi/spi.h>
#include <linux/bcd.h>
#include <linux/rtc.h>
#include <linux/delay.h>
@@ -766,6 +767,8 @@ static int rv3029_probe(struct device *dev, struct regmap *regmap, int irq,
return PTR_ERR_OR_ZERO(rv3029->rtc);
}
+#if IS_ENABLED(CONFIG_I2C)
+
static int rv3029_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
@@ -799,9 +802,108 @@ static struct i2c_driver rv3029_driver = {
.id_table = rv3029_id,
};
-module_i2c_driver(rv3029_driver);
+static int rv3029_register_driver(void)
+{
+ return i2c_add_driver(&rv3029_driver);
+}
+
+static void rv3029_unregister_driver(void)
+{
+ i2c_del_driver(&rv3029_driver);
+}
+
+#else
+
+static int rv3029_register_driver(void)
+{
+ return 0;
+}
+
+static void rv3029_unregister_driver(void)
+{
+}
+
+#endif
+
+#if IS_ENABLED(CONFIG_SPI_MASTER)
+
+static int rv3049_probe(struct spi_device *spi)
+{
+ static const struct regmap_config config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ };
+ 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 rv3029_probe(&spi->dev, regmap, spi->irq, "rv3049");
+}
+
+static struct spi_driver rv3049_driver = {
+ .driver = {
+ .name = "rv3049",
+ },
+ .probe = rv3049_probe,
+};
+
+static int rv3049_register_driver(void)
+{
+ return spi_register_driver(&rv3049_driver);
+}
+
+static void rv3049_unregister_driver(void)
+{
+ spi_unregister_driver(&rv3049_driver);
+}
+
+#else
+
+static int rv3049_register_driver(void)
+{
+ return 0;
+}
+
+static void rv3049_unregister_driver(void)
+{
+}
+
+#endif
+
+static int __init rv30x9_init(void)
+{
+ int ret;
+
+ ret = rv3029_register_driver();
+ if (ret) {
+ pr_err("Failed to register rv3029 driver: %d\n", ret);
+ return ret;
+ }
+
+ ret = rv3049_register_driver();
+ if (ret) {
+ pr_err("Failed to register rv3049 driver: %d\n", ret);
+ rv3029_unregister_driver();
+ }
+
+ return ret;
+}
+module_init(rv30x9_init)
+
+static void __exit rv30x9_exit(void)
+{
+ rv3049_unregister_driver();
+ rv3029_unregister_driver();
+}
+module_exit(rv30x9_exit)
MODULE_AUTHOR("Gregory Hermant <gregory.hermant@calao-systems.com>");
MODULE_AUTHOR("Michael Buesch <m@bues.ch>");
-MODULE_DESCRIPTION("Micro Crystal RV3029 RTC driver");
+MODULE_DESCRIPTION("Micro Crystal RV3029/RV3049 RTC driver");
MODULE_LICENSE("GPL");
+MODULE_ALIAS("spi:rv3049");