The twl-rtc has the following dependencies from other drivers during the boot:
pinctrl
|-i2c-omap
|- twl-core
|- twl-rtc
The i2c-omap probe may be deferred because pinctrl iss not ready yet. As result,
i2c-omap will be probed at late init time. Which, in turn, will delay twl-core
initialization till late init time too.
But, the twl-rtc driver is registered from finction twl_rtc_init() at
module(device) init time and contains part of its initialization code within it.
Unfortunatelly, this code depends on twl-core which may be not ready at that
moment and, as result, wrong register map will be selected
(on OMAP3 twl6030_rtc_reg_map will be selected instead of twl4030_rtc_reg_map).
static int __init twl_rtc_init(void)
{
if (twl_class_is_4030()) <--- twl-core might be not ready here
<--- and twl_class_is_4030() will return 0
rtc_reg_map = (u8 *) twl4030_rtc_reg_map;
else
rtc_reg_map = (u8 *) twl6030_rtc_reg_map;
return platform_driver_register(&twl4030rtc_driver);
}
Hence, move register map selection code in twl_rtc_probe() to solve this issue.
Cc: Alessandro Zummo <a.zummo@xxxxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Tony Lindgren <tony@xxxxxxxxxxx>
Signed-off-by: Grygorii Strashko <grygorii.strashko@xxxxxx>
---
drivers/rtc/rtc-twl.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/rtc/rtc-twl.c b/drivers/rtc/rtc-twl.c
index bbda0fd..1698115 100644
--- a/drivers/rtc/rtc-twl.c
+++ b/drivers/rtc/rtc-twl.c
@@ -481,6 +481,11 @@ static int twl_rtc_probe(struct platform_device *pdev)
if (irq <= 0)
goto out1;
+ if (twl_class_is_4030())
+ rtc_reg_map = (u8 *) twl4030_rtc_reg_map;
+ else
+ rtc_reg_map = (u8 *) twl6030_rtc_reg_map;
+
ret = twl_rtc_read_u8(&rd_reg, REG_RTC_STATUS_REG);
if (ret < 0)
goto out1;
@@ -622,11 +627,6 @@ static struct platform_driver twl4030rtc_driver = {
static int __init twl_rtc_init(void)
{
- if (twl_class_is_4030())
- rtc_reg_map = (u8 *) twl4030_rtc_reg_map;
- else
- rtc_reg_map = (u8 *) twl6030_rtc_reg_map;
-
return platform_driver_register(&twl4030rtc_driver);
}
module_init(twl_rtc_init);
--
1.7.9.5
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