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rtc: ds1307: add ds1308 variant

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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>
This commit is contained in:
Sean Nyekjaer 2017-06-08 12:36:54 +02:00 committed by Alexandre Belloni
parent c35c4195f9
commit 300a7735be
1 changed files with 12 additions and 0 deletions
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12
drivers/rtc/rtc-ds1307.c
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@ -34,6 +34,7 @@
*/ */
enum ds_type { enum ds_type {
ds_1307, ds_1307,
ds_1308,
ds_1337, ds_1337,
ds_1338, ds_1338,
ds_1339, ds_1339,
@ -152,6 +153,10 @@ static struct chip_desc chips[last_ds_type] = {
.nvram_offset = 8, .nvram_offset = 8,
.nvram_size = 56, .nvram_size = 56,
}, },
[ds_1308] = {
.nvram_offset = 8,
.nvram_size = 56,
},
[ds_1337] = { [ds_1337] = {
.alarm = 1, .alarm = 1,
.century_reg = DS1307_REG_MONTH, .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[] = { static const struct i2c_device_id ds1307_id[] = {
{ "ds1307", ds_1307 }, { "ds1307", ds_1307 },
{ "ds1308", ds_1308 },
{ "ds1337", ds_1337 }, { "ds1337", ds_1337 },
{ "ds1338", ds_1338 }, { "ds1338", ds_1338 },
{ "ds1339", ds_1339 }, { "ds1339", ds_1339 },
@ -222,6 +228,10 @@ static const struct of_device_id ds1307_of_match[] = {
.compatible = "dallas,ds1307", .compatible = "dallas,ds1307",
.data = (void *)ds_1307 .data = (void *)ds_1307
}, },
{
.compatible = "dallas,ds1308",
.data = (void *)ds_1308
},
{ {
.compatible = "dallas,ds1337", .compatible = "dallas,ds1337",
.data = (void *)ds_1337 .data = (void *)ds_1337
@ -282,6 +292,7 @@ MODULE_DEVICE_TABLE(of, ds1307_of_match);
#ifdef CONFIG_ACPI #ifdef CONFIG_ACPI
static const struct acpi_device_id ds1307_acpi_ids[] = { static const struct acpi_device_id ds1307_acpi_ids[] = {
{ .id = "DS1307", .driver_data = ds_1307 }, { .id = "DS1307", .driver_data = ds_1307 },
{ .id = "DS1308", .driver_data = ds_1308 },
{ .id = "DS1337", .driver_data = ds_1337 }, { .id = "DS1337", .driver_data = ds_1337 },
{ .id = "DS1338", .driver_data = ds_1338 }, { .id = "DS1338", .driver_data = ds_1338 },
{ .id = "DS1339", .driver_data = ds_1339 }, { .id = "DS1339", .driver_data = ds_1339 },
@ -1558,6 +1569,7 @@ read_rtc:
goto read_rtc; goto read_rtc;
} }
break; break;
case ds_1308:
case ds_1338: case ds_1338:
/* clock halted? turn it on, so clock can tick. */ /* clock halted? turn it on, so clock can tick. */
if (tmp & DS1307_BIT_CH) if (tmp & DS1307_BIT_CH)