rtc: pcf2127: set regmap max_register

Set regmap max_register to ease debugging and enforce the register range.

Link: https://lore.kernel.org/r/20200505201310.255145-4-alexandre.belloni@bootlin.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

diff --git a/drivers/rtc/rtc-pcf2127.c b/drivers/rtc/rtc-pcf2127.c
index 5ac9965..0390780 100644 (file)
--- a/drivers/rtc/rtc-pcf2127.c
+++ b/drivers/rtc/rtc-pcf2127.c
@@ -634,6 +634,7 @@ static int pcf2127_i2c_probe(struct i2c_client *client,
        static const struct regmap_config config = {
                .reg_bits = 8,
                .val_bits = 8,
+               .max_register = 0x1d,
        };
 
        if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
@@ -701,6 +702,7 @@ static int pcf2127_spi_probe(struct spi_device *spi)
                .val_bits = 8,
                .read_flag_mask = 0xa0,
                .write_flag_mask = 0x20,
+               .max_register = 0x1d,
        };
        struct regmap *regmap;