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>
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 @@
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 @@
.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");