rtc: ds1307: add ds1308 variant

The ds1308 variant is very similar to the already supported ds1338
variant, it have more debug registers and a square wave clock output.

Signed-off-by: Sean Nyekjaer <sean.nyekjaer@prevas.dk>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>

diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c
index 922675281b7aee06c54e19115a35f9b16a632998..57ea25400ecd4438046b987daeae68ed888159da 100644 (file)
--- a/drivers/rtc/rtc-ds1307.c
+++ b/drivers/rtc/rtc-ds1307.c
@@ -34,6 +34,7 @@
  */
 enum ds_type {
        ds_1307,
+       ds_1308,
        ds_1337,
        ds_1338,
        ds_1339,
@@ -152,6 +153,10 @@ static struct chip_desc chips[last_ds_type] = {
                .nvram_offset   = 8,
                .nvram_size     = 56,
        },
+       [ds_1308] = {
+               .nvram_offset   = 8,
+               .nvram_size     = 56,
+       },
        [ds_1337] = {
                .alarm          = 1,
                .century_reg    = DS1307_REG_MONTH,
@@ -198,6 +203,7 @@ static struct chip_desc chips[last_ds_type] = {
 
 static const struct i2c_device_id ds1307_id[] = {
        { "ds1307", ds_1307 },
+       { "ds1308", ds_1308 },
        { "ds1337", ds_1337 },
        { "ds1338", ds_1338 },
        { "ds1339", ds_1339 },
@@ -222,6 +228,10 @@ static const struct of_device_id ds1307_of_match[] = {
                .compatible = "dallas,ds1307",
                .data = (void *)ds_1307
        },
+       {
+               .compatible = "dallas,ds1308",
+               .data = (void *)ds_1308
+       },
        {
                .compatible = "dallas,ds1337",
                .data = (void *)ds_1337
@@ -282,6 +292,7 @@ MODULE_DEVICE_TABLE(of, ds1307_of_match);
 #ifdef CONFIG_ACPI
 static const struct acpi_device_id ds1307_acpi_ids[] = {
        { .id = "DS1307", .driver_data = ds_1307 },
+       { .id = "DS1308", .driver_data = ds_1308 },
        { .id = "DS1337", .driver_data = ds_1337 },
        { .id = "DS1338", .driver_data = ds_1338 },
        { .id = "DS1339", .driver_data = ds_1339 },
@@ -1558,6 +1569,7 @@ read_rtc:
                        goto read_rtc;
                }
                break;
+       case ds_1308:
        case ds_1338:
                /* clock halted?  turn it on, so clock can tick. */
                if (tmp & DS1307_BIT_CH)