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path: root/drivers/rtc/rtc-rx6110.c
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Diffstat (limited to 'drivers/rtc/rtc-rx6110.c')
-rw-r--r--drivers/rtc/rtc-rx6110.c165
1 files changed, 142 insertions, 23 deletions
diff --git a/drivers/rtc/rtc-rx6110.c b/drivers/rtc/rtc-rx6110.c
index 3a9eb7043f01..a7b671a21022 100644
--- a/drivers/rtc/rtc-rx6110.c
+++ b/drivers/rtc/rtc-rx6110.c
@@ -16,6 +16,7 @@
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/spi/spi.h>
+#include <linux/i2c.h>
/* RX-6110 Register definitions */
#define RX6110_REG_SEC 0x10
@@ -310,6 +311,27 @@ static const struct rtc_class_ops rx6110_rtc_ops = {
.set_time = rx6110_set_time,
};
+static int rx6110_probe(struct rx6110_data *rx6110, struct device *dev)
+{
+ int err;
+
+ rx6110->rtc = devm_rtc_device_register(dev,
+ RX6110_DRIVER_NAME,
+ &rx6110_rtc_ops, THIS_MODULE);
+
+ if (IS_ERR(rx6110->rtc))
+ return PTR_ERR(rx6110->rtc);
+
+ err = rx6110_init(rx6110);
+ if (err)
+ return err;
+
+ rx6110->rtc->max_user_freq = 1;
+
+ return 0;
+}
+
+#ifdef CONFIG_SPI_MASTER
static struct regmap_config regmap_spi_config = {
.reg_bits = 8,
.val_bits = 8,
@@ -318,13 +340,12 @@ static struct regmap_config regmap_spi_config = {
};
/**
- * rx6110_probe - initialize rtc driver
+ * rx6110_spi_probe - initialize rtc driver
* @spi: pointer to spi device
*/
-static int rx6110_probe(struct spi_device *spi)
+static int rx6110_spi_probe(struct spi_device *spi)
{
struct rx6110_data *rx6110;
- int err;
if ((spi->bits_per_word && spi->bits_per_word != 8) ||
(spi->max_speed_hz > 2000000) ||
@@ -346,27 +367,14 @@ static int rx6110_probe(struct spi_device *spi)
spi_set_drvdata(spi, rx6110);
- rx6110->rtc = devm_rtc_device_register(&spi->dev,
- RX6110_DRIVER_NAME,
- &rx6110_rtc_ops, THIS_MODULE);
-
- if (IS_ERR(rx6110->rtc))
- return PTR_ERR(rx6110->rtc);
-
- err = rx6110_init(rx6110);
- if (err)
- return err;
-
- rx6110->rtc->max_user_freq = 1;
-
- return 0;
+ return rx6110_probe(rx6110, &spi->dev);
}
-static const struct spi_device_id rx6110_id[] = {
+static const struct spi_device_id rx6110_spi_id[] = {
{ "rx6110", 0 },
{ }
};
-MODULE_DEVICE_TABLE(spi, rx6110_id);
+MODULE_DEVICE_TABLE(spi, rx6110_spi_id);
static const struct of_device_id rx6110_spi_of_match[] = {
{ .compatible = "epson,rx6110" },
@@ -374,16 +382,127 @@ static const struct of_device_id rx6110_spi_of_match[] = {
};
MODULE_DEVICE_TABLE(of, rx6110_spi_of_match);
-static struct spi_driver rx6110_driver = {
+static struct spi_driver rx6110_spi_driver = {
.driver = {
.name = RX6110_DRIVER_NAME,
.of_match_table = of_match_ptr(rx6110_spi_of_match),
},
- .probe = rx6110_probe,
- .id_table = rx6110_id,
+ .probe = rx6110_spi_probe,
+ .id_table = rx6110_spi_id,
+};
+
+static int rx6110_spi_register(void)
+{
+ return spi_register_driver(&rx6110_spi_driver);
+}
+
+static void rx6110_spi_unregister(void)
+{
+ spi_unregister_driver(&rx6110_spi_driver);
+}
+#else
+static int rx6110_spi_register(void)
+{
+ return 0;
+}
+
+static void rx6110_spi_unregister(void)
+{
+}
+#endif /* CONFIG_SPI_MASTER */
+
+#ifdef CONFIG_I2C
+static struct regmap_config regmap_i2c_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = RX6110_REG_IRQ,
+ .read_flag_mask = 0x80,
};
-module_spi_driver(rx6110_driver);
+static int rx6110_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
+ struct rx6110_data *rx6110;
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA
+ | I2C_FUNC_SMBUS_I2C_BLOCK)) {
+ dev_err(&adapter->dev,
+ "doesn't support required functionality\n");
+ return -EIO;
+ }
+
+ rx6110 = devm_kzalloc(&client->dev, sizeof(*rx6110), GFP_KERNEL);
+ if (!rx6110)
+ return -ENOMEM;
+
+ rx6110->regmap = devm_regmap_init_i2c(client, &regmap_i2c_config);
+ if (IS_ERR(rx6110->regmap)) {
+ dev_err(&client->dev, "regmap init failed for rtc rx6110\n");
+ return PTR_ERR(rx6110->regmap);
+ }
+
+ i2c_set_clientdata(client, rx6110);
+
+ return rx6110_probe(rx6110, &client->dev);
+}
+
+static const struct i2c_device_id rx6110_i2c_id[] = {
+ { "rx6110", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, rx6110_i2c_id);
+
+static struct i2c_driver rx6110_i2c_driver = {
+ .driver = {
+ .name = RX6110_DRIVER_NAME,
+ },
+ .probe = rx6110_i2c_probe,
+ .id_table = rx6110_i2c_id,
+};
+
+static int rx6110_i2c_register(void)
+{
+ return i2c_add_driver(&rx6110_i2c_driver);
+}
+
+static void rx6110_i2c_unregister(void)
+{
+ i2c_del_driver(&rx6110_i2c_driver);
+}
+#else
+static int rx6110_i2c_register(void)
+{
+ return 0;
+}
+
+static void rx6110_i2c_unregister(void)
+{
+}
+#endif /* CONFIG_I2C */
+
+static int __init rx6110_module_init(void)
+{
+ int ret;
+
+ ret = rx6110_spi_register();
+ if (ret)
+ return ret;
+
+ ret = rx6110_i2c_register();
+ if (ret)
+ rx6110_spi_unregister();
+
+ return ret;
+}
+module_init(rx6110_module_init);
+
+static void __exit rx6110_module_exit(void)
+{
+ rx6110_spi_unregister();
+ rx6110_i2c_unregister();
+}
+module_exit(rx6110_module_exit);
MODULE_AUTHOR("Val Krutov <val.krutov@erd.epson.com>");
MODULE_DESCRIPTION("RX-6110 SA RTC driver");